/* =============================================================================
   CASA HACKER DESIGN SYSTEM · v1.0
   Forked from IBM Carbon · Reskinned with Casa Hacker brand identity
   ─────────────────────────────────────────────────────────────────────────────
   Organização:
   01 · Fonts
   02 · Tokens (light + dark)
   03 · Reset & base
   04 · Shell (header, sidebar, main, footer)
   05 · Typography utilities
   06 · Page structure (header, TOC, sections)
   07 · Components — buttons, tags, tiles, forms, notifications, code, tables,
                     tabs, accordion, modal, dropdown, tooltip, loading, link,
                     breadcrumb, pagination, search, checkbox, radio
   08 · Documentation helpers (demo, anatomy, api-table, swatches, do/don't)
   09 · Patterns (BIT divider, hero-h symbol)
   10 · Utilities (grid, stack, row, spacing)
   11 · Theme toggle, skip-link
   12 · Print
   13 · Responsive
   ============================================================================= */

/* -----------------------------------------------------------------------------
   01 · FONTS · self-hosted WOFF2
   ----------------------------------------------------------------------------- */
@font-face { font-family: 'IBM Plex Mono'; src: url('./fonts/IBM_Plex_Mono/IBMPlexMono-Light.woff2') format('woff2'); font-weight: 300; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('./fonts/IBM_Plex_Mono/IBMPlexMono-Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('./fonts/IBM_Plex_Mono/IBMPlexMono-Italic.woff2') format('woff2'); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('./fonts/IBM_Plex_Mono/IBMPlexMono-Medium.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('./fonts/IBM_Plex_Mono/IBMPlexMono-SemiBold.woff2') format('woff2'); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: 'IBM Plex Mono'; src: url('./fonts/IBM_Plex_Mono/IBMPlexMono-Bold.woff2') format('woff2'); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: 'Roboto Flex'; src: url('./fonts/Roboto_Flex/RobotoFlex-Variable.woff2') format('woff2-variations'), url('./fonts/Roboto_Flex/RobotoFlex-Variable.woff2') format('woff2'); font-weight: 100 1000; font-stretch: 25% 151%; font-style: normal; font-display: swap; }
@font-face { font-family: 'VT323'; src: url('./fonts/VT323/VT323-Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }

/* -----------------------------------------------------------------------------
   02 · DESIGN TOKENS
   ----------------------------------------------------------------------------- */
:root {
  /* Brand · primary */
  --ch-code:           #32FA96;
  --ch-code-hover:     #2BE085;
  --ch-code-active:    #24C775;
  /* a11y · variantes do Code Green para uso como TEXTO sobre fundo claro.
     #32FA96 contra branco/--ch-css dá ~2.3:1 (falha WCAG AA 4.5:1).
     Use --ch-code-text em links, success-text, status — qualquer Code
     usado como foreground informativo sobre fundos claros. Para fundos
     escuros, continue usando --ch-code (contraste sobra). */
  --ch-code-text:      #0E7D45;        /* 4.85:1 em #FFFFFF · AA ok */
  --ch-code-text-soft: #137A47;        /* 4.55:1 · uso em headings/labels */
  --ch-dos:            #3C433C;
  --ch-dos-hover:      #4A524A;
  --ch-java:           #91938C;
  --ch-inspect:        #D7DCD7;
  --ch-console:        #F0F5F0;
  --ch-css:            #F8FCF8;

  /* Brand · secondary */
  --ch-sec-g:          #E1FFDE;
  --ch-sec-b:          #B3D9FE;
  --ch-sec-r:          #FF9ECF;
  --ch-script:         #D79B2E;
  --ch-yellow:         #E8D048;            /* Internet Segura · atenção informal */
  --ch-yellow-light:   #F7E36D;

  /* Brand · extended (submarcas) */
  --ch-purple:         #AA78E6;            /* PerifaImpacto */
  --ch-purple-light:   #D3BAF5;
  --ch-purple-dark:    #6C44A0;

  /* DS Section accent colors · cada seção do site herda uma cor da paleta */
  /* secundária pra criar diferenciação visual + uso real da paleta completa */
  --sec-foundations: var(--ch-code);        /* verde · raiz/base */
  --sec-foundations-soft: var(--ch-sec-g);  /* light bg */
  --sec-guidelines:  var(--ch-sec-b);       /* sky blue · normativo */
  --sec-guidelines-soft: rgba(179, 217, 254, 0.18);
  --sec-components:  var(--ch-purple);      /* purple · construção */
  --sec-components-soft: rgba(170, 120, 230, 0.16);
  --sec-patterns:    var(--ch-sec-r);       /* pink · composição */
  --sec-patterns-soft: rgba(255, 158, 207, 0.18);
  --sec-dataviz:     var(--ch-script);      /* orange · analítico */
  --sec-dataviz-soft: rgba(215, 155, 46, 0.16);
  --sec-brand:       var(--ch-code);        /* code green · identidade */
  --sec-brand-soft:  rgba(50, 250, 150, 0.12);
  --sec-help:        var(--ch-java);        /* neutro · suporte */
  --sec-help-soft:   rgba(145, 147, 140, 0.18);

  /* Submarca signature colors (auditado contra assets reais · 2026-05) */
  --ch-sub-hackerclubes:    #B3D9FE;       /* Sec Blue · tech educacional (azul claro) */
  --ch-sub-hackerclubes-fg: #0E3A6B;
  --ch-sub-inclusao-tech:   #E1FFDE;       /* Sec Green Light · acolhimento */
  --ch-sub-inclusao-tech-fg:#0F5A33;
  --ch-sub-internet-segura: #E8D048;       /* Amarelo signature · "internet que joga junto" */
  --ch-sub-internet-segura-fg:#3B443C;
  --ch-sub-minas-em-tech:   #FF9ECF;       /* Pink · mulheres na tech (signature real) */
  --ch-sub-minas-em-tech-fg:#7A2752;
  --ch-sub-mao-na-massa:    #D79B2E;       /* Script orange · DIY energia */
  --ch-sub-mao-na-massa-fg: #FFFFFF;
  --ch-sub-perifa-impacto:  #AA78E6;       /* Purple · periferia + IA */
  --ch-sub-perifa-impacto-fg:#FFFFFF;

  /* Carbon · backgrounds */
  --background:           var(--ch-css);
  --background-hover:     var(--ch-console);
  --background-active:    var(--ch-inspect);
  --background-selected:  rgba(50, 250, 150, 0.12);
  --background-inverse:   var(--ch-dos);
  --background-brand:     var(--ch-code);

  /* Carbon · layers */
  --layer-01:             #FFFFFF;
  --layer-02:             var(--ch-console);
  --layer-03:             var(--ch-inspect);
  --layer-hover-01:       var(--ch-console);
  --layer-hover-02:       var(--ch-inspect);
  --layer-hover-03:       #C5CCC5;
  --layer-selected-01:    var(--ch-inspect);
  --layer-active-01:      #C5CCC5;

  /* Carbon · fields */
  --field-01:             var(--ch-console);
  --field-02:             #FFFFFF;
  --field-03:             var(--ch-inspect);
  --field-hover-01:       var(--ch-inspect);
  --field-hover-02:       var(--ch-console);

  /* Carbon · borders */
  --border-subtle-00:     var(--ch-inspect);
  --border-subtle-01:     #C8CEC8;
  --border-subtle-02:     #B5BBB5;
  --border-strong-01:     var(--ch-java);
  --border-strong-02:     var(--ch-dos);
  --border-interactive:   var(--ch-code);
  --border-disabled:      #C8CEC8;
  --border-tile-01:       var(--ch-inspect);

  /* Carbon · text */
  --text-primary:         var(--ch-dos);
  --text-secondary:       #5C625C;
  --text-tertiary:        var(--ch-java);
  --text-placeholder:     var(--ch-java);
  --text-helper:          var(--ch-java);
  --text-on-color:        var(--ch-dos);
  --text-on-color-disabled: rgba(60, 67, 60, 0.5);
  --text-inverse:         var(--ch-css);
  --text-disabled:        #BFC4BF;
  --text-error:           #DA1E28;

  /* Carbon · link · light theme usa variante AA-safe (--ch-code-text) */
  --link-primary:         var(--ch-dos);
  --link-primary-hover:   var(--ch-code-text);
  --link-secondary:       var(--ch-code-text);
  --link-inverse:         var(--ch-code);
  --link-visited:         #6C44A0;

  /* Carbon · icon */
  --icon-primary:         var(--ch-dos);
  --icon-secondary:       var(--ch-java);
  --icon-on-color:        var(--ch-dos);
  --icon-inverse:         var(--ch-css);
  --icon-disabled:        #BFC4BF;

  /* Carbon · interactive */
  --interactive:          var(--ch-code);
  --focus:                var(--ch-code-active);
  --focus-inset:          var(--ch-dos);
  --focus-inverse:        var(--ch-css);

  /* Carbon · support · success precisa AA pra texto de status */
  --support-error:        #DA1E28;
  --support-success:      var(--ch-code-text);
  --support-warning:      var(--ch-script);
  --support-info:         #0F62FE;
  --support-error-inverse:#FF8389;
  --support-success-inverse: #5CFFAA;

  /* Tags (chips) */
  --tag-code-bg:    #C2F5DA;    --tag-code-fg:    #0F5A33;
  --tag-blue-bg:    #B3D9FE;    --tag-blue-fg:    #0E3A6B;
  --tag-pink-bg:    #FFCCE3;    --tag-pink-fg:    #7A2752;
  --tag-script-bg:  #F5E4C2;    --tag-script-fg:  #5C3F0A;
  --tag-purple-bg:  #E5D6FA;    --tag-purple-fg:  #4A2A7A;
  --tag-red-bg:     #FFB3B3;    --tag-red-fg:     #6B0000;
  --tag-default-bg: var(--ch-console);
  --tag-default-fg: var(--ch-dos);
  --tag-outline-border: var(--ch-dos);
  --tag-outline-fg:     var(--ch-dos);

  /* Buttons */
  --btn-primary-bg:         var(--ch-code);
  --btn-primary-bg-hover:   var(--ch-code-hover);
  --btn-primary-bg-active:  var(--ch-code-active);
  --btn-primary-fg:         var(--ch-dos);

  --btn-secondary-bg:       var(--ch-dos);
  --btn-secondary-bg-hover: var(--ch-dos-hover);
  --btn-secondary-bg-active:#2B302B;
  --btn-secondary-fg:       var(--ch-css);

  --btn-tertiary-border:    var(--ch-dos);
  --btn-tertiary-fg:        var(--ch-dos);
  --btn-tertiary-hover-bg:  var(--ch-dos);
  --btn-tertiary-hover-fg:  var(--ch-css);

  --btn-danger-bg:          #DA1E28;
  --btn-danger-bg-hover:    #B81921;
  --btn-danger-fg:          var(--ch-css);

  --btn-disabled-bg:        var(--ch-inspect);
  --btn-disabled-fg:        var(--text-disabled);

  /* Code snippet */
  --code-snippet-bg:        var(--ch-dos);
  --code-snippet-fg:        var(--ch-inspect);

  /* Spacing · BIT-aligned (8px = 1 BIT) */
  --spacing-01: 2px;    --spacing-02: 4px;    --spacing-03: 8px;    --spacing-04: 12px;
  --spacing-05: 16px;   --spacing-06: 24px;   --spacing-07: 32px;   --spacing-08: 40px;
  --spacing-09: 48px;   --spacing-10: 64px;   --spacing-11: 80px;   --spacing-12: 96px;
  --spacing-13: 160px;
  --bit: 8px;

  /* Sizing */
  --size-xs: 24px;  --size-sm: 32px;  --size-md: 40px;  --size-lg: 48px;
  --size-xl: 64px;  --size-2xl: 80px; --size-3xl: 96px;

  /* Container */
  --container-sm:  640px;
  --container-md:  800px;
  --container-lg:  1024px;
  --container-xl:  1280px;
  --container-2xl: 1440px;

  /* Type families */
  --font-mono:  'IBM Plex Mono', ui-monospace, monospace;
  --font-sans:  'Roboto Flex', system-ui, sans-serif;
  --font-pixel: 'VT323', monospace;

  /* Type scale (Carbon-like) */
  --code-01:       400 12px/16px var(--font-mono);
  --code-02:       400 14px/20px var(--font-mono);
  --label-01:      500 12px/16px var(--font-mono);
  --label-02:      500 14px/18px var(--font-mono);
  --helper-text-01:400 12px/16px var(--font-mono);
  --helper-text-02:400 14px/18px var(--font-mono);
  --body-01:       400 14px/20px var(--font-sans);
  --body-02:       400 16px/24px var(--font-sans);
  --heading-01:    600 14px/18px var(--font-sans);
  --heading-02:    600 16px/22px var(--font-sans);
  --heading-03:    400 20px/28px var(--font-sans);
  --heading-04:    400 28px/36px var(--font-sans);
  --heading-05:    400 32px/40px var(--font-sans);
  --heading-06:    300 42px/50px var(--font-sans);
  --heading-07:    300 54px/64px var(--font-sans);

  /* Motion */
  --duration-fast-01:     70ms;
  --duration-fast-02:     110ms;
  --duration-moderate-01: 150ms;
  --duration-moderate-02: 240ms;
  --duration-slow-01:     400ms;
  --duration-slow-02:     700ms;

  --ease-productive: cubic-bezier(0.2, 0, 0.38, 0.9);
  --ease-expressive: cubic-bezier(0.4, 0.14, 0.3, 1);
  --ease-entrance:   cubic-bezier(0, 0, 0.38, 0.9);
  --ease-exit:       cubic-bezier(0.2, 0, 1, 0.9);
  --ease-standard:   cubic-bezier(0.5, 0, 0.1, 1);

  /* Shadows */
  --shadow-01: 0 1px 2px rgba(60, 67, 60, 0.08);
  --shadow-02: 0 2px 6px rgba(60, 67, 60, 0.10);
  --shadow-03: 0 4px 12px rgba(60, 67, 60, 0.14);
  --shadow-04: 0 8px 24px rgba(60, 67, 60, 0.18);

  /* Z-index scale */
  --z-base:     1;
  --z-dropdown: 100;
  --z-sticky:   200;
  --z-overlay:  500;
  --z-modal:    700;
  --z-tooltip:  900;
  --z-toast:    1000;

  /* Brand display */
  --logo-stage-bg:    var(--ch-console);
  --logo-stage-border:var(--ch-inspect);
  --hero-dark-bg:     var(--ch-dos);
  --hero-dark-border: transparent;

  /* ---- Data visualization tokens ---- */
  /* Categorical · 8 cores (séries sem ordem) */
  --dv-cat-1: #32FA96;  --dv-cat-2: #AA78E6;  --dv-cat-3: #D79B2E;  --dv-cat-4: #B3D9FE;
  --dv-cat-5: #FF9ECF;  --dv-cat-6: #3C433C;  --dv-cat-7: #5CFFAA;  --dv-cat-8: #D3BAF5;
  /* Sequential · 7 steps · verde (do claro ao escuro) */
  --dv-seq-1: #E1FFDE;  --dv-seq-2: #C2F5DA;  --dv-seq-3: #9BE5BF;  --dv-seq-4: #5CFFAA;
  --dv-seq-5: #32FA96;  --dv-seq-6: #24C775;  --dv-seq-7: #0F5A33;
  /* Divergente · 7 steps · vermelho→neutro→verde */
  --dv-div-1: #DA1E28;  --dv-div-2: #FF8389;  --dv-div-3: #FFCCE3;  --dv-div-4: #F0F5F0;
  --dv-div-5: #C2F5DA;  --dv-div-6: #5CFFAA;  --dv-div-7: #24C775;
  /* Chart UI */
  --dv-axis:        var(--text-helper);
  --dv-axis-line:   var(--border-subtle-01);
  --dv-gridline:    var(--border-subtle-00);
  --dv-tooltip-bg:  var(--ch-dos);
  --dv-tooltip-fg:  var(--ch-css);
}

[data-theme="dark"] {
  --background:           var(--ch-dos);
  --background-hover:     #444B44;
  --background-active:    #525952;
  --background-selected:  rgba(50, 250, 150, 0.16);
  --background-inverse:   var(--ch-css);

  --layer-01:             #2C322C;
  --layer-02:             #383E38;
  --layer-03:             #444B44;
  --layer-hover-01:       #383E38;
  --layer-hover-02:       #444B44;
  --layer-hover-03:       #525952;
  --layer-selected-01:    #525952;
  --layer-active-01:      #5C625C;

  --field-01:             #2C322C;
  --field-02:             #383E38;
  --field-03:             #444B44;
  --field-hover-01:       #383E38;
  --field-hover-02:       #444B44;

  --border-subtle-00:     #4A524A;
  --border-subtle-01:     #5C625C;
  --border-subtle-02:     #6E756E;
  --border-strong-01:     var(--ch-inspect);
  --border-strong-02:     var(--ch-css);
  --border-disabled:      #4A524A;
  --border-tile-01:       #4A524A;

  --text-primary:         var(--ch-css);
  --text-secondary:       var(--ch-inspect);
  --text-tertiary:        #ADB1A9;
  --text-placeholder:     #ADB1A9;
  --text-helper:          #ADB1A9;
  --text-on-color:        var(--ch-dos);
  --text-inverse:         var(--ch-dos);
  --text-disabled:        #5C625C;
  --text-error:           #FF8389;

  --link-primary:         var(--ch-code);
  --link-primary-hover:   var(--ch-code-hover);
  --link-secondary:       var(--ch-code-hover);
  --link-visited:         var(--ch-purple-light);

  --icon-primary:         var(--ch-css);
  --icon-secondary:       var(--ch-inspect);
  --icon-on-color:        var(--ch-dos);
  --icon-inverse:         var(--ch-dos);
  --icon-disabled:        #5C625C;

  --focus:                var(--ch-code);
  --focus-inset:          var(--ch-dos);
  --focus-inverse:        var(--ch-code);

  --tag-code-bg:    rgba(50, 250, 150, 0.16);   --tag-code-fg:    #5CFFAA;
  --tag-blue-bg:    rgba(179, 217, 254, 0.18);  --tag-blue-fg:    #D6E9FF;
  --tag-pink-bg:    rgba(255, 158, 207, 0.18);  --tag-pink-fg:    #FFCFE3;
  --tag-script-bg:  rgba(215, 155, 46, 0.22);   --tag-script-fg:  #F2C97B;
  --tag-purple-bg:  rgba(170, 120, 230, 0.22);  --tag-purple-fg:  #D3BAF5;
  --tag-red-bg:     rgba(255, 100, 100, 0.20);  --tag-red-fg:     #FFB3B3;
  --tag-default-bg: #444B44;                    --tag-default-fg: var(--ch-css);
  --tag-outline-border: var(--ch-inspect);      --tag-outline-fg: var(--ch-css);

  --btn-secondary-bg:        var(--ch-inspect);
  --btn-secondary-bg-hover:  var(--ch-css);
  --btn-secondary-bg-active: #B5BBB5;
  --btn-secondary-fg:        var(--ch-dos);
  --btn-tertiary-border:     var(--ch-inspect);
  --btn-tertiary-fg:         var(--ch-css);
  --btn-tertiary-hover-bg:   var(--ch-inspect);
  --btn-tertiary-hover-fg:   var(--ch-dos);
  --btn-disabled-bg:         #4A524A;

  --code-snippet-bg:         #1F231F;

  --shadow-01: 0 1px 2px rgba(0, 0, 0, 0.30);
  --shadow-02: 0 2px 6px rgba(0, 0, 0, 0.40);
  --shadow-03: 0 4px 12px rgba(0, 0, 0, 0.50);
  --shadow-04: 0 8px 24px rgba(0, 0, 0, 0.55);

  --logo-stage-bg:    #F0F5F0;
  --logo-stage-border:var(--border-subtle-00);
  --hero-dark-bg:     #1F231F;
  --hero-dark-border: var(--border-subtle-00);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* -----------------------------------------------------------------------------
   03 · RESET & BASE
   ----------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body {
  background: var(--background);
  color: var(--text-primary);
  font: var(--body-02);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}
a { color: var(--link-primary); transition: color var(--duration-fast-02); }
a:hover { color: var(--link-primary-hover); }
a:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

img, svg { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; }
button:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

::selection { background: var(--ch-code); color: var(--ch-dos); }

/* Skip-link for a11y */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--ch-code);
  color: var(--ch-dos);
  padding: var(--spacing-04) var(--spacing-05);
  font: var(--label-02);
  text-decoration: none;
  z-index: var(--z-toast);
  transition: top var(--duration-fast-02);
}
.skip-link:focus { top: 0; color: var(--ch-dos); }

/* -----------------------------------------------------------------------------
   04 · SHELL · header, sidebar, main, footer
   ----------------------------------------------------------------------------- */
.shell-header {
  height: 48px;
  background: var(--ch-dos);
  color: var(--ch-css);
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-05);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  gap: var(--spacing-05);
}
.shell-header .menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--ch-css);
  cursor: pointer;
  padding: var(--spacing-03);
  font-size: 18px;
  line-height: 1;
}
.shell-header .menu-toggle:hover { background: rgba(255,255,255,0.08); }

.shell-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-04);
  color: var(--ch-css);
  text-decoration: none;
}
.shell-brand:hover { color: var(--ch-css); }

.h-mini {
  width: 18px; height: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  flex-shrink: 0;
}
.h-mini span { background: transparent; }
.h-mini span.on { background: var(--ch-code); }

/* Header brand · logotipo Casa Hacker (mask + currentColor) */
.shell-brand-logo {
  display: inline-block;
  width: 140px;
  height: 18px;
  flex-shrink: 0;
  background-color: currentColor;
  -webkit-mask: var(--logo) center / contain no-repeat;
          mask: var(--logo) center / contain no-repeat;
  transition: opacity var(--duration-fast-02), transform var(--duration-fast-02);
}
.shell-brand:hover .shell-brand-logo { opacity: 0.85; }
.shell-brand-logo--glitch {
  animation: ch-brand-glitch 0.28s steps(2, end) 1;
}
@keyframes ch-brand-glitch {
  0%   { transform: translate(0, 0);   filter: none; }
  20%  { transform: translate(-1px, 1px); filter: hue-rotate(45deg); }
  40%  { transform: translate(2px, -1px); filter: hue-rotate(-30deg); }
  60%  { transform: translate(-2px, 0);   filter: hue-rotate(15deg); }
  80%  { transform: translate(1px, 1px);  filter: none; }
  100% { transform: translate(0, 0); }
}
@media (max-width: 600px) {
  .shell-brand-logo { width: 108px; height: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  .shell-brand-logo--glitch { animation: none; }
}

.shell-brand-name {
  font: var(--label-02);
  letter-spacing: 0.04em;
}
.shell-brand-name .ds {
  color: var(--ch-java);
  margin-left: var(--spacing-03);
}

.shell-actions {
  margin-left: auto;
  display: flex;
  gap: var(--spacing-03);
  align-items: center;
}
.shell-link {
  color: var(--ch-inspect);
  text-decoration: none;
  font: var(--label-01);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--spacing-03) var(--spacing-04);
  transition: color var(--duration-fast-02);
}
.shell-link:hover { color: var(--ch-code); }

.shell-container {
  display: grid;
  grid-template-columns: 256px 1fr;
  min-height: calc(100vh - 48px);
}

.sidebar {
  background: var(--layer-01);
  border-right: 1px solid var(--border-subtle-00);
  padding: var(--spacing-05) 0 var(--spacing-09);
  position: sticky;
  top: 48px;
  height: calc(100vh - 48px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-subtle-01) transparent;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-subtle-01); }

.sidebar-search-wrap {
  position: relative;
  margin: 0 var(--spacing-05) var(--spacing-04);
}
.sidebar-search {
  width: 100%;
  padding: var(--spacing-03) var(--spacing-04);
  background: var(--field-01);
  border: none;
  border-bottom: 1px solid var(--border-strong-01);
  font: var(--code-02);
  color: var(--text-primary);
  outline: none;
}
.sidebar-search:focus { border-bottom-color: var(--ch-code); }
.sidebar-search::placeholder { color: var(--text-placeholder); }
.sidebar-search-kbd {
  position: absolute;
  right: var(--spacing-03);
  top: 50%;
  transform: translateY(-50%);
  font: var(--code-01);
  color: var(--text-helper);
  background: var(--layer-02);
  padding: 1px 6px;
  border: 1px solid var(--border-subtle-01);
  pointer-events: none;
}

.nav-section { padding: var(--spacing-02) 0; }
.nav-section-toggle {
  width: 100%;
  background: transparent;
  border: none;
  font: var(--label-01);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-helper);
  padding: var(--spacing-03) var(--spacing-06);
  display: flex;
  align-items: center;
  gap: var(--spacing-03);
  cursor: pointer;
  text-align: left;
}
.nav-section-toggle::before { content: '//'; color: var(--ch-code); transition: color var(--duration-fast-02); }

/* Cada seção tem cor de acento própria (paleta secundária ativa) */
.nav-section[data-section-id="foundation"]   .nav-section-toggle::before { color: var(--sec-foundations); }
.nav-section[data-section-id="guidelines"]   .nav-section-toggle::before { color: var(--sec-guidelines); }
.nav-section[data-section-id="components"]   .nav-section-toggle::before { color: var(--sec-components); }
.nav-section[data-section-id="patterns"]     .nav-section-toggle::before { color: var(--sec-patterns); }
.nav-section[data-section-id="dataviz"]      .nav-section-toggle::before { color: var(--sec-dataviz); }
.nav-section[data-section-id="brand"]        .nav-section-toggle::before { color: var(--sec-brand); }
.nav-section[data-section-id="help"]         .nav-section-toggle::before { color: var(--sec-help); }
.nav-section[data-section-id="contributing"] .nav-section-toggle::before { color: var(--sec-help); }
/* Active link border-left segue a cor da seção */
.nav-section[data-section-id="foundation"]   a.active { border-left-color: var(--sec-foundations); }
.nav-section[data-section-id="guidelines"]   a.active { border-left-color: var(--sec-guidelines); }
.nav-section[data-section-id="components"]   a.active { border-left-color: var(--sec-components); }
.nav-section[data-section-id="patterns"]     a.active { border-left-color: var(--sec-patterns); }
.nav-section[data-section-id="dataviz"]      a.active { border-left-color: var(--sec-dataviz); }
.nav-section[data-section-id="brand"]        a.active { border-left-color: var(--sec-brand); }
.nav-section[data-section-id="help"]         a.active { border-left-color: var(--sec-help); }
.nav-section[data-section-id="contributing"] a.active { border-left-color: var(--sec-help); }
.nav-section-toggle .chevron {
  margin-left: auto;
  transition: transform var(--duration-fast-02);
  color: var(--text-helper);
  font-size: 10px;
}
.nav-section.collapsed .chevron { transform: rotate(-90deg); }
.nav-section.collapsed .nav-section-items { display: none; }
.nav-section-toggle:hover { color: var(--text-primary); }

.nav-section a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-03) var(--spacing-06);
  font: var(--body-01);
  color: var(--text-primary);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all var(--duration-fast-02) var(--ease-productive);
}
.nav-section a:hover {
  background: var(--background-hover);
  border-left-color: var(--ch-code);
  color: var(--text-primary);
}
.nav-section a.active {
  background: var(--background-selected);
  border-left-color: var(--ch-code);
  font-weight: 500;
}
.nav-section a .nav-tag {
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
}
.nav-section a.active .nav-tag { color: var(--ch-code-text); }
[data-theme="dark"] .nav-section a.active .nav-tag { color: var(--ch-code); }

.main {
  padding: var(--spacing-09) var(--spacing-10);
  max-width: var(--container-xl);
  width: 100%;
}

.shell-footer {
  margin-top: var(--spacing-12);
  padding-top: var(--spacing-07);
  border-top: 1px solid var(--border-subtle-00);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font: var(--code-01);
  color: var(--text-helper);
  flex-wrap: wrap;
  gap: var(--spacing-04);
}
.shell-footer .left::before { content: '// '; color: var(--ch-code); }
.shell-footer a { color: var(--text-helper); text-decoration: none; }
.shell-footer a:hover { color: var(--ch-code-text); }

/* Sidebar mobile backdrop — fica oculto no desktop, ativado dentro da media query */
.sidebar-backdrop { display: none; }

/* -----------------------------------------------------------------------------
   14 · DATA VIZ · cartões, charts inline, legenda, tooltip
   ----------------------------------------------------------------------------- */
.chart {
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  padding: var(--spacing-06);
  position: relative;
}
.chart-title {
  font: var(--heading-02);
  color: var(--text-primary);
  margin-bottom: var(--spacing-02);
}
.chart-subtitle {
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-05);
}
.chart-subtitle::before { content: '// '; color: var(--ch-code); }
.chart-source {
  font: var(--code-01);
  color: var(--text-helper);
  margin-top: var(--spacing-04);
  padding-top: var(--spacing-03);
  border-top: 1px solid var(--border-subtle-00);
}
.chart-source::before { content: 'fonte · '; color: var(--ch-code-text); }
[data-theme="dark"] .chart-source::before { color: var(--ch-code); }

.chart-svg { width: 100%; height: auto; display: block; }
.chart-svg text { font-family: var(--font-mono); font-size: 10px; fill: var(--dv-axis); }
.chart-svg .axis-line { stroke: var(--dv-axis-line); stroke-width: 1; }
.chart-svg .grid-line { stroke: var(--dv-gridline); stroke-width: 1; stroke-dasharray: 2 2; }
.chart-svg .bar { transition: opacity var(--duration-fast-02); }
.chart-svg .bar:hover { opacity: 0.7; }
.chart-svg .line { fill: none; stroke-width: 2; }
.chart-svg .area { opacity: 0.18; }
.chart-svg .point { transition: r var(--duration-fast-02); }
.chart-svg .point:hover { r: 6; }
.chart-svg .label { font-size: 9px; fill: var(--text-secondary); }

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-04);
  margin-top: var(--spacing-04);
  font: var(--code-01);
  color: var(--text-secondary);
}
.chart-legend-item { display: inline-flex; align-items: center; gap: var(--spacing-02); }
.chart-legend-item .dot {
  width: 10px; height: 10px; flex-shrink: 0;
  border-radius: 1px;
}
.chart-legend-item .line {
  width: 16px; height: 2px; flex-shrink: 0;
}

.chart-kpi {
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  border-left: 3px solid var(--ch-code);
  padding: var(--spacing-05) var(--spacing-06);
}
.chart-kpi .label {
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-03);
}
.chart-kpi .value {
  font: 600 36px/1 var(--font-mono);
  color: var(--text-primary);
}
.chart-kpi .delta {
  font: var(--code-02);
  margin-top: var(--spacing-02);
}
.chart-kpi .delta.up { color: var(--ch-code-text); }
[data-theme="dark"] .chart-kpi .delta.up { color: var(--ch-code); }
.chart-kpi .delta.down { color: var(--support-error); }

.chart-palette-row {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 1px;
  margin-bottom: var(--spacing-03);
}
.chart-palette-row .swatch {
  aspect-ratio: 2 / 1;
  display: flex; align-items: flex-end; justify-content: flex-start;
  padding: var(--spacing-02);
  font: var(--code-01);
  color: rgba(0,0,0,0.5);
}
.chart-palette-row .swatch.on-dark { color: rgba(255,255,255,0.6); }

.chart-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-05);
}
@media (max-width: 800px) {
  .chart-grid { grid-template-columns: 1fr; }
  .chart-palette-row { grid-template-columns: repeat(4, 1fr); }
}

/* Hover tooltip dentro de SVG (CSS-only via :hover de <g>) */
.chart-svg .tip { opacity: 0; pointer-events: none; transition: opacity var(--duration-fast-02); }
.chart-svg .bar-group:hover .tip,
.chart-svg .point-group:hover .tip { opacity: 1; }
.chart-svg .tip rect { fill: var(--dv-tooltip-bg); }
.chart-svg .tip text { fill: var(--dv-tooltip-fg); font-size: 10px; }

/* -----------------------------------------------------------------------------
   ACCESSIBILITY BAR · override visual pra alinhar com identidade Casa Hacker
   ─────────────────────────────────────────────────────────────────────────────
   A barra original usa cores hardcoded (fundo #21272a, ativo IBM blue #0F62FE).
   Aqui sobrescrevemos pros tokens Casa Hacker — fundo --ch-dos, ativo --ch-code
   verde. Mantém a estrutura e features (a barra é upstream em github.com/
   casahacker/barra-acessibilidade), só repinta com !important pq o CSS dela
   usa valores cruos sem variáveis.
   ----------------------------------------------------------------------------- */
.ch-a11y-bar {
  background: var(--ch-dos) !important;
  font-family: var(--font-mono) !important;
}
.ch-a11y-brand,
.ch-a11y-section-label {
  letter-spacing: 0.08em !important;
}
.ch-a11y-btn--active {
  background: var(--ch-code) !important;
  color: var(--ch-dos) !important;
  font-weight: 600 !important;
}
.ch-a11y-btn--active:hover {
  background: var(--ch-code-hover) !important;
}
.ch-a11y-btn:focus-visible {
  outline: 2px solid var(--ch-code) !important;
  outline-offset: -2px !important;
}
.ch-a11y-ruler {
  background: var(--ch-code) !important;
}

/* Empurra todo o resto pra baixo do offset de 32px da barra */
body { padding-top: 32px; }
.shell-header { top: 32px; }
.sidebar { top: 80px; height: calc(100vh - 80px); }
.skip-link { top: -100px; }
.skip-link:focus { top: 32px; }
@media (max-width: 1024px) {
  .sidebar { top: 80px; height: calc(100vh - 80px); }
  .sidebar-backdrop { inset: 80px 0 0 0; }
}

/* -----------------------------------------------------------------------------
   05 · TYPOGRAPHY UTILITIES
   ----------------------------------------------------------------------------- */
.t-code-01  { font: var(--code-01); }
.t-code-02  { font: var(--code-02); }
.t-label-01 { font: var(--label-01); text-transform: uppercase; letter-spacing: 0.08em; }
.t-label-02 { font: var(--label-02); }
.t-helper   { font: var(--helper-text-01); color: var(--text-helper); }
.t-body-01  { font: var(--body-01); }
.t-body-02  { font: var(--body-02); }
.t-h01 { font: var(--heading-01); }
.t-h02 { font: var(--heading-02); }
.t-h03 { font: var(--heading-03); }
.t-h04 { font: var(--heading-04); }
.t-h05 { font: var(--heading-05); letter-spacing: -0.02em; }
.t-h06 { font: var(--heading-06); letter-spacing: -0.025em; }
.t-h07 { font: var(--heading-07); letter-spacing: -0.03em; }

.t-secondary { color: var(--text-secondary); }
.t-tertiary  { color: var(--text-tertiary); }
.t-mono      { font-family: var(--font-mono); }
.t-pixel     { font-family: var(--font-pixel); }

.t-comment::before { content: '('; color: var(--ch-code); font-weight: 600; }
.t-comment::after  { content: ')'; color: var(--ch-code); font-weight: 600; }
.t-comment         { color: var(--text-helper); font: var(--code-02); }

.t-slash::before { content: '// '; color: var(--ch-code); }
.t-arrow::before { content: '→ '; color: var(--ch-code); }

/* -----------------------------------------------------------------------------
   06 · PAGE STRUCTURE
   ----------------------------------------------------------------------------- */
.page-header {
  border-bottom: 1px solid var(--border-subtle-00);
  padding-bottom: var(--spacing-07);
  margin-bottom: var(--spacing-09);
}
.page-breadcrumb {
  font: var(--label-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-04);
}
.page-breadcrumb a { color: var(--text-helper); text-decoration: none; }
.page-breadcrumb a:hover { color: var(--ch-code-text); }
[data-theme="dark"] .page-breadcrumb a:hover { color: var(--ch-code); }
.page-breadcrumb .sep { margin: 0 var(--spacing-03); color: var(--ch-code); }

.page-title {
  font: var(--heading-07);
  letter-spacing: -0.025em;
  margin-bottom: var(--spacing-05);
}
.page-title .green { color: var(--ch-code-text); }
[data-theme="dark"] .page-title .green { color: var(--ch-code); }
.page-intro {
  font: var(--body-02);
  color: var(--text-secondary);
  max-width: 720px;
  line-height: 1.55;
}
.page-tags {
  display: flex;
  gap: var(--spacing-03);
  margin-top: var(--spacing-05);
  flex-wrap: wrap;
}

.toc {
  background: var(--layer-02);
  border-left: 2px solid var(--ch-code);
  padding: var(--spacing-05) var(--spacing-06);
  margin: var(--spacing-07) 0;
}
.toc h5 {
  font: var(--label-01);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-helper);
  margin-bottom: var(--spacing-03);
}
.toc h5::before { content: '// '; color: var(--ch-code); }
.toc ol { list-style: none; counter-reset: toc; padding: 0; }
.toc li { counter-increment: toc; padding: var(--spacing-02) 0; }
.toc li::before {
  content: counter(toc, decimal-leading-zero);
  font: var(--code-01);
  color: var(--ch-code-text);
  margin-right: var(--spacing-04);
}
[data-theme="dark"] .toc li::before { color: var(--ch-code); }
.toc a {
  font: var(--body-01);
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--duration-fast-02);
}
.toc a:hover { color: var(--ch-code-text); }
[data-theme="dark"] .toc a:hover { color: var(--ch-code); }
.toc a.toc-active {
  color: var(--ch-code-text);
  font-weight: 500;
}
[data-theme="dark"] .toc a.toc-active { color: var(--ch-code); }
.toc li:has(a.toc-active)::before { color: var(--ch-code-text); font-weight: 600; }
[data-theme="dark"] .toc li:has(a.toc-active)::before { color: var(--ch-code); }

.section { margin-bottom: var(--spacing-12); scroll-margin-top: 72px; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: var(--spacing-04);
  margin-bottom: var(--spacing-07);
  border-bottom: 1px solid var(--border-subtle-00);
  gap: var(--spacing-05);
  flex-wrap: wrap;
}
.section-head h2 { font: var(--heading-04); letter-spacing: -0.02em; }
.section-head .meta {
  font: var(--label-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.subsection { margin-bottom: var(--spacing-09); }
.subsection h3 { font: var(--heading-02); margin-bottom: var(--spacing-02); }
.subsection > p { font: var(--body-01); color: var(--text-secondary); margin-bottom: var(--spacing-05); max-width: 720px; line-height: 1.55; }
.subsection h3 + .t-comment { display: block; margin-bottom: var(--spacing-05); }

/* -----------------------------------------------------------------------------
   07 · COMPONENTS
   ----------------------------------------------------------------------------- */

/* --- 07.1 · Buttons --- */
.btn {
  font: var(--label-02);
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-09);
  min-height: var(--size-lg);
  padding: 0 var(--spacing-05);
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration-fast-02) var(--ease-productive);
  outline: none;
  white-space: nowrap;
}
.btn::after { content: '→'; font: var(--code-02); }
.btn:focus-visible { box-shadow: inset 0 0 0 2px var(--focus); }
.btn[disabled], .btn.disabled {
  background: var(--btn-disabled-bg);
  color: var(--btn-disabled-fg);
  border-color: transparent;
  cursor: not-allowed;
}

.btn--primary { background: var(--btn-primary-bg); color: var(--btn-primary-fg); }
.btn--primary:hover { background: var(--btn-primary-bg-hover); color: var(--btn-primary-fg); }
.btn--primary:active { background: var(--btn-primary-bg-active); }

.btn--secondary { background: var(--btn-secondary-bg); color: var(--btn-secondary-fg); }
.btn--secondary:hover { background: var(--btn-secondary-bg-hover); color: var(--btn-secondary-fg); }
.btn--secondary:active { background: var(--btn-secondary-bg-active); }

.btn--tertiary { background: transparent; color: var(--btn-tertiary-fg); border-color: var(--btn-tertiary-border); }
.btn--tertiary:hover { background: var(--btn-tertiary-hover-bg); color: var(--btn-tertiary-hover-fg); }

.btn--ghost { background: transparent; color: var(--text-primary); }
.btn--ghost::after { content: ''; }
.btn--ghost:hover { background: var(--background-hover); color: var(--link-primary-hover); }

.btn--danger { background: var(--btn-danger-bg); color: var(--btn-danger-fg); }
.btn--danger:hover { background: var(--btn-danger-bg-hover); color: var(--btn-danger-fg); }

.btn--sm { min-height: var(--size-sm); font-size: 12px; padding: 0 var(--spacing-04); gap: var(--spacing-05); }
.btn--md { min-height: var(--size-md); padding: 0 var(--spacing-04); }
.btn--lg { min-height: var(--size-xl); gap: var(--spacing-10); padding: var(--spacing-04) var(--spacing-05); align-items: flex-start; padding-top: var(--spacing-04); }
.btn--xl { min-height: var(--size-2xl); font-size: 16px; gap: var(--spacing-11); padding: var(--spacing-05); align-items: flex-start; }

.btn--icon { gap: var(--spacing-03); padding: 0 var(--spacing-04); width: var(--size-lg); justify-content: center; }
.btn--icon::after { content: ''; }
.btn--icon svg { width: 16px; height: 16px; }

/* Icon leading / trailing variants */
.btn--icon-leading { justify-content: flex-start; gap: var(--spacing-03); }
.btn--icon-leading::after { content: ''; }
.btn--icon-leading > svg, .btn--icon-leading > .glyph { width: 16px; height: 16px; flex-shrink: 0; }
.btn--icon-trailing { justify-content: space-between; }
.btn--icon-trailing::after { content: ''; }
.btn--icon-trailing > svg, .btn--icon-trailing > .glyph { width: 16px; height: 16px; flex-shrink: 0; margin-left: var(--spacing-03); }

/* Block (full-width) */
.btn--block { width: 100%; justify-content: center; }
.btn--block::after { content: ''; }

/* Loading state */
.btn--loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}
.btn--loading::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 16px; height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  color: var(--ch-dos);
  animation: ch-spin 700ms linear infinite;
}
.btn--loading::after { display: none; }

/* --- 07.2 · Tags --- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-02);
  height: 24px;
  padding: 0 var(--spacing-04);
  border-radius: 999px;
  font: var(--label-01);
  background: var(--tag-default-bg);
  color: var(--tag-default-fg);
  border: 1px solid transparent;
}
/* ----- Mockup · displays inline SVG mockups de impressos --------------- */
.mockup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-05);
  margin-bottom: var(--spacing-06);
}
.mockup {
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  padding: var(--spacing-05);
  transition: all var(--duration-fast-02);
}
.mockup:hover { border-color: var(--ch-code); }
.mockup-stage {
  background: var(--layer-02);
  padding: var(--spacing-06);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-04);
  min-height: 180px;
}
.mockup-stage svg { max-width: 100%; max-height: 240px; height: auto; }
.mockup-meta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-01);
}
.mockup-label {
  font: var(--label-02);
  color: var(--text-primary);
  text-transform: lowercase;
}
.mockup-sub {
  font: var(--code-01);
  color: var(--text-helper);
}
.mockup-sub::before { content: '// '; color: var(--ch-code); }

@media (max-width: 600px) {
  .mockup-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-04); }
  .mockup { padding: var(--spacing-04); }
  .mockup-stage { padding: var(--spacing-04); min-height: 120px; }
}
@media (max-width: 380px) {
  .mockup-grid { grid-template-columns: 1fr; }
}

/* ----- Playground · interactive props editor ---------------------------- */
.playground {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--spacing-04);
  background: var(--layer-02);
  border: 1px solid var(--border-subtle-00);
  margin-bottom: var(--spacing-05);
}
.playground-preview {
  padding: var(--spacing-09) var(--spacing-07);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  border-right: 1px solid var(--border-subtle-00);
}
.playground-controls {
  padding: var(--spacing-05);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-04);
  background: var(--layer-01);
}
.playground-control {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-02);
}
.playground-control > span {
  font: var(--label-01);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-helper);
}
.playground-control select,
.playground-control input {
  height: 32px;
  padding: 0 var(--spacing-03);
  background: var(--field-01);
  border: 1px solid var(--border-subtle-01);
  font: var(--code-02);
  color: var(--text-primary);
  outline: none;
}
.playground-control select:focus,
.playground-control input:focus { border-color: var(--ch-code); }

.playground-output { grid-column: 1 / -1; border-top: 1px solid var(--border-subtle-00); }
.playground-output summary {
  padding: var(--spacing-03) var(--spacing-05);
  cursor: pointer;
  font: var(--label-02);
  color: var(--text-secondary);
  list-style: none;
}
.playground-output summary::before {
  content: '▸ '; color: var(--ch-code-text);
  display: inline-block;
  transition: transform var(--duration-fast-02);
}
[data-theme="dark"] .playground-output summary::before { color: var(--ch-code); }
.playground-output[open] summary::before { transform: rotate(90deg); }
.playground-output .code-snippet { margin: 0; border: none; }

@media (max-width: 800px) {
  .playground { grid-template-columns: 1fr; }
  .playground-preview { border-right: none; border-bottom: 1px solid var(--border-subtle-00); min-height: 120px; padding: var(--spacing-07); }
}

/* ----- Icon cell · galeria de iconography ------------------------------- */
.icon-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-02);
  padding: var(--spacing-04);
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  transition: all 110ms;
  cursor: pointer;
}
.icon-cell:hover { background: var(--background-hover); border-color: var(--ch-code); }
.icon-cell .icon-name {
  font: var(--code-01);
  color: var(--text-helper);
}

/* ----- Motion demo card · página motion --------------------------------- */
.motion-demo {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-03);
  padding: var(--spacing-04);
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
}
.motion-demo-label {
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.motion-demo-var {
  font: var(--code-02);
  color: var(--text-tertiary);
}
.motion-demo-stage {
  position: relative;
  height: 48px;
  background: var(--layer-02);
  border: 1px dashed var(--border-subtle-01);
  overflow: hidden;
  cursor: pointer;
  padding: 0;
  text-align: left;
}
.motion-demo-box {
  position: absolute;
  left: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  background: var(--ch-code);
}
.motion-demo-play {
  position: absolute;
  right: var(--spacing-04);
  top: 50%;
  transform: translateY(-50%);
  font: var(--code-01);
  color: var(--text-helper);
}

/* ----- Common utilities adicionais -------------------------------------- */
.mt-03 { margin-top: var(--spacing-03); }
.mb-03 { margin-bottom: var(--spacing-03); }
.relative-z1 { position: relative; z-index: 1; }
.t-helper-uc {
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ----- Icon utility · uso de sprite SVG --------------------------------- */
.ico {
  width: 16px; height: 16px;
  display: inline-block;
  vertical-align: -3px;
  fill: none;
  stroke: currentColor;
  flex-shrink: 0;
}
.ico--12 { width: 12px; height: 12px; vertical-align: -2px; }
.ico--20 { width: 20px; height: 20px; vertical-align: -4px; }
.ico--24 { width: 24px; height: 24px; vertical-align: -5px; }
.ico--32 { width: 32px; height: 32px; vertical-align: -7px; }
.ico--inherit { color: currentColor; }
.ico--code  { color: var(--ch-code-text); }
[data-theme="dark"] .ico--code { color: var(--ch-code); }
.ico--muted { color: var(--text-helper); }

.tag--sm { height: 20px; padding: 0 var(--spacing-03); font-size: 11px; }
.tag--code   { background: var(--tag-code-bg);   color: var(--tag-code-fg); }
.tag--blue   { background: var(--tag-blue-bg);   color: var(--tag-blue-fg); }
.tag--pink   { background: var(--tag-pink-bg);   color: var(--tag-pink-fg); }
.tag--script { background: var(--tag-script-bg); color: var(--tag-script-fg); }
.tag--yellow { background: rgba(232, 208, 72, 0.20); color: #5A4F0C; }
[data-theme="dark"] .tag--yellow { background: rgba(232, 208, 72, 0.22); color: #F7E36D; }
.tag--purple { background: var(--tag-purple-bg); color: var(--tag-purple-fg); }
.tag--purple-ai { background: var(--tag-purple-bg); color: var(--tag-purple-fg); }
.tag--purple-ai::before { content: '◆ '; }
.tag--red    { background: var(--tag-red-bg);    color: var(--tag-red-fg); }
.tag--outline{ background: transparent; border-color: var(--tag-outline-border); color: var(--tag-outline-fg); }
.tag--dismissible button {
  background: none; border: none; color: inherit; cursor: pointer;
  padding: 0; margin-left: var(--spacing-02); font-size: 14px; line-height: 1;
}

/* --- 07.3 · Tiles --- */
.tile {
  background: var(--layer-01);
  padding: var(--spacing-06);
  border: 1px solid transparent;
  transition: all var(--duration-fast-02);
  position: relative;
}
.tile--bordered { border-color: var(--border-tile-01); }
.tile--clickable { cursor: pointer; text-decoration: none; color: inherit; display: block; }
.tile--clickable:hover { background: var(--layer-hover-01); border-color: var(--border-subtle-01); color: inherit; }
.tile--clickable:hover::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--ch-code);
}
.tile--selected { border-color: var(--ch-code); background: var(--background-selected); }
.tile--selected::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--ch-code);
}
.tile h4 { font: var(--heading-02); margin-bottom: var(--spacing-03); }
.tile p { font: var(--body-01); color: var(--text-secondary); line-height: 1.5; }

/* --- 07.4 · Form --- */
.form-group { margin-bottom: var(--spacing-06); }
.form-label { font: var(--label-01); display: block; margin-bottom: var(--spacing-02); color: var(--text-primary); }
.form-label .req { color: var(--support-error); margin-left: 2px; }
.form-helper { font: var(--helper-text-01); color: var(--text-helper); margin-top: var(--spacing-02); }
.form-helper::before { content: '// '; color: var(--ch-code); }
.form-error   { font: var(--helper-text-01); color: var(--support-error); margin-top: var(--spacing-02); }
.form-error::before   { content: '⚠ '; }
.form-success { font: var(--helper-text-01); color: var(--ch-code-text); margin-top: var(--spacing-02); }
[data-theme="dark"] .form-success { color: var(--ch-code); }
.form-success::before { content: '✓ '; }
.form-warning { font: var(--helper-text-01); color: var(--support-warning); margin-top: var(--spacing-02); }
.form-warning::before { content: '! '; }
.form-disabled-hint { font: var(--helper-text-01); color: var(--text-tertiary); margin-top: var(--spacing-02); font-style: italic; }

.input, .select, .textarea {
  width: 100%;
  height: var(--size-md);
  padding: 0 var(--spacing-04);
  border: none;
  border-bottom: 1px solid var(--border-strong-01);
  background: var(--field-01);
  color: var(--text-primary);
  font: var(--body-01);
  transition: all var(--duration-fast-02);
  outline: none;
}
.input:hover, .select:hover { background: var(--field-hover-01); }
.input:focus, .select:focus, .textarea:focus {
  border-bottom-color: var(--ch-code);
  outline: 2px solid var(--ch-code);
  outline-offset: -2px;
}
.input[disabled], .select[disabled], .textarea[disabled] {
  background: var(--field-01);
  color: var(--text-disabled);
  cursor: not-allowed;
  border-bottom-color: var(--border-disabled);
}
.input.invalid, .select.invalid, .textarea.invalid {
  border-bottom-color: var(--support-error);
  outline: 1px solid var(--support-error);
  outline-offset: -1px;
}
.input.valid, .select.valid, .textarea.valid {
  border-bottom-color: var(--ch-code-text);
  background-image:
    radial-gradient(circle, var(--ch-code-active) 8%, transparent 9%);
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px 16px;
  padding-right: var(--spacing-08);
}
[data-theme="dark"] .input.valid, [data-theme="dark"] .select.valid, [data-theme="dark"] .textarea.valid {
  border-bottom-color: var(--ch-code);
  background-image: radial-gradient(circle, var(--ch-code) 8%, transparent 9%);
}
.input.warning, .select.warning, .textarea.warning {
  border-bottom-color: var(--support-warning);
}
.textarea { height: 120px; padding: var(--spacing-03) var(--spacing-04); resize: vertical; line-height: 1.5; }
.input::placeholder { color: var(--text-placeholder); }
.select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--icon-secondary) 50%), linear-gradient(135deg, var(--icon-secondary) 50%, transparent 50%); background-position: calc(100% - 16px) center, calc(100% - 11px) center; background-size: 5px 5px; background-repeat: no-repeat; padding-right: var(--spacing-08); }

.checkbox-row, .radio-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-03);
  cursor: pointer;
  font: var(--body-01);
  padding: var(--spacing-02) 0;
}
.checkbox-row input, .radio-row input {
  width: 18px; height: 18px;
  accent-color: var(--ch-code);
  cursor: pointer;
  flex-shrink: 0;
}

/* --- 07.5 · Notification --- */
.notification {
  display: flex;
  background: var(--layer-01);
  border-left: 3px solid;
  box-shadow: var(--shadow-01);
  min-width: 280px;
}
.notification-icon {
  padding: var(--spacing-04);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  font: var(--code-02);
  font-weight: 700;
  flex-shrink: 0;
}
.notification-body { padding: var(--spacing-04) var(--spacing-05); flex: 1; }
.notification-body strong { font: var(--heading-01); display: block; margin-bottom: var(--spacing-01); color: var(--text-primary); }
.notification-body p { font: var(--body-01); color: var(--text-secondary); }
.notification-close {
  padding: 0 var(--spacing-04);
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text-helper);
  font-size: 18px;
  line-height: 1;
  align-self: flex-start;
  margin-top: var(--spacing-04);
}
.notification-close:hover { color: var(--text-primary); }
.notification--success { border-left-color: var(--ch-code); }
.notification--success .notification-icon { color: var(--ch-code-text); }
[data-theme="dark"] .notification--success .notification-icon { color: var(--ch-code); }
.notification--error { border-left-color: var(--support-error); }
.notification--error .notification-icon { color: var(--support-error); }
.notification--warning { border-left-color: var(--support-warning); }
.notification--warning .notification-icon { color: var(--support-warning); }
.notification--info { border-left-color: var(--border-strong-02); }
.notification--info .notification-icon { color: var(--text-primary); }
.notification.is-dismissing { opacity: 0; transform: translateX(20px); transition: all var(--duration-moderate-01); }

.toast-stack {
  position: fixed;
  bottom: var(--spacing-05);
  right: var(--spacing-05);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-03);
  z-index: var(--z-toast);
  max-width: calc(100vw - var(--spacing-10));
}

/* --- 07.6 · Code snippet --- */
.code-snippet {
  background: var(--code-snippet-bg);
  color: var(--code-snippet-fg);
  padding: var(--spacing-05);
  font: var(--code-02);
  position: relative;
  overflow-x: auto;
  border: 1px solid var(--border-subtle-00);
  white-space: pre;
  margin-bottom: var(--spacing-04);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--ch-java) transparent;
}
.code-snippet::-webkit-scrollbar { height: 6px; }
.code-snippet::-webkit-scrollbar-thumb { background: var(--ch-java); }

/* Gradient indicador de scroll horizontal (mobile) */
.code-snippet.has-overflow::after {
  content: '';
  position: sticky;
  position: -webkit-sticky;
  right: 0; top: 0; bottom: 0;
  width: 40px;
  display: block;
  pointer-events: none;
  background: linear-gradient(to right, transparent, var(--code-snippet-bg));
  margin-left: -40px;
  align-self: stretch;
  flex-shrink: 0;
}
@media (max-width: 600px) {
  .code-snippet {
    font-size: 12px;
    padding: var(--spacing-04);
  }
  .code-snippet::before {
    content: '◀ scroll horizontal ▶';
    display: block;
    font: var(--code-01);
    color: var(--ch-java);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-03);
    opacity: 0.5;
  }
  /* Esconde quando snippet cabe inteiro */
  .code-snippet:not(.has-overflow)::before { display: none; }
}
.code-snippet .k { color: var(--ch-code); }
.code-snippet .s { color: var(--ch-sec-r); }
.code-snippet .c { color: var(--ch-java); font-style: italic; }
.code-snippet .v { color: var(--ch-sec-b); }
.code-snippet .n { color: var(--ch-script); }

.code-copy {
  position: absolute;
  top: var(--spacing-03);
  right: var(--spacing-03);
  background: rgba(255,255,255,0.08);
  color: var(--ch-css);
  border: 1px solid rgba(255,255,255,0.15);
  padding: var(--spacing-02) var(--spacing-04);
  font: var(--code-01);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all var(--duration-fast-02);
  font-family: var(--font-mono);
}
.code-copy:hover { background: rgba(255,255,255,0.16); }
.code-copy.is-copied { background: var(--ch-code); color: var(--ch-dos); border-color: var(--ch-code); }

.code-inline {
  background: var(--layer-02);
  color: var(--text-primary);
  padding: 1px 6px;
  font: var(--code-02);
  border: 1px solid var(--border-subtle-00);
  white-space: nowrap;
}

/* --- 07.7 · Table --- */
.data-table { width: 100%; border-collapse: collapse; background: var(--layer-01); }
.data-table thead { background: var(--layer-02); border-bottom: 1px solid var(--border-subtle-01); }
.data-table th {
  font: var(--heading-01);
  text-align: left;
  padding: var(--spacing-04) var(--spacing-05);
  color: var(--text-primary);
  white-space: nowrap;
}
.data-table td {
  padding: var(--spacing-04) var(--spacing-05);
  font: var(--body-01);
  border-bottom: 1px solid var(--border-subtle-00);
  color: var(--text-primary);
  vertical-align: top;
}
.data-table tr:hover td { background: var(--background-hover); }
.data-table--compact th { padding: var(--spacing-03) var(--spacing-04); font: var(--label-01); }
.data-table--compact td { padding: var(--spacing-03) var(--spacing-04); font: var(--code-02); }
.data-table--zebra tbody tr:nth-child(odd) td { background: var(--layer-02); }

/* Sortable headers */
.data-table th[data-sort] {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 28px;
}
.data-table th[data-sort]:hover { background: var(--layer-hover-02); }
.data-table th[data-sort]::after {
  content: '↕';
  position: absolute;
  right: var(--spacing-04);
  top: 50%; transform: translateY(-50%);
  color: var(--text-helper);
  font: var(--code-01);
}
.data-table th[data-sort="asc"]::after { content: '↑'; color: var(--ch-code-text); }
.data-table th[data-sort="desc"]::after { content: '↓'; color: var(--ch-code-text); }
[data-theme="dark"] .data-table th[data-sort="asc"]::after,
[data-theme="dark"] .data-table th[data-sort="desc"]::after { color: var(--ch-code); }

/* Row selection */
.data-table tr.selected td { background: var(--background-selected); }
.data-table--selectable tbody tr { cursor: pointer; }

/* --- 07.8 · Tabs --- */
.tabs { display: flex; border-bottom: 1px solid var(--border-subtle-00); flex-wrap: wrap; }
.tab {
  padding: var(--spacing-04) var(--spacing-05);
  font: var(--label-02);
  color: var(--text-secondary);
  cursor: pointer;
  border: none;
  background: transparent;
  position: relative;
  transition: color var(--duration-fast-02);
}
.tab:hover { color: var(--text-primary); background: var(--background-hover); }
.tab.active { color: var(--text-primary); }
.tab.active::after {
  content: ''; position: absolute; bottom: -1px; left: 0; width: 100%; height: 2px;
  background: var(--ch-code);
}
.tab[disabled] { color: var(--text-disabled); cursor: not-allowed; }
.tab-panel { padding: var(--spacing-06) 0; }
.tab-panel[hidden] { display: none; }

/* --- 07.9 · Accordion --- */
.accordion { border: 1px solid var(--border-subtle-00); background: var(--layer-01); }
.accordion-item + .accordion-item { border-top: 1px solid var(--border-subtle-00); }
.accordion-header {
  width: 100%;
  background: transparent;
  border: none;
  padding: var(--spacing-04) var(--spacing-05);
  font: var(--heading-02);
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-04);
}
.accordion-header:hover { background: var(--background-hover); }
.accordion-header .chevron { transition: transform var(--duration-fast-02); color: var(--ch-code-text); font-size: 14px; }
[data-theme="dark"] .accordion-header .chevron { color: var(--ch-code); }
.accordion-item.open .chevron { transform: rotate(90deg); }
.accordion-body {
  padding: 0 var(--spacing-05) var(--spacing-05);
  font: var(--body-01);
  color: var(--text-secondary);
  line-height: 1.5;
  display: none;
}
.accordion-item.open .accordion-body { display: block; }

/* --- 07.10 · Modal --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(60, 67, 60, 0.5);
  z-index: var(--z-overlay);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-05);
  animation: ch-fade-in var(--duration-moderate-01);
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--layer-01);
  width: 100%;
  max-width: 640px;
  max-height: calc(100vh - var(--spacing-10));
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-04);
  border: 1px solid var(--border-subtle-00);
  animation: ch-slide-up var(--duration-moderate-02) var(--ease-entrance);
}
.modal-header {
  padding: var(--spacing-05) var(--spacing-06);
  border-bottom: 1px solid var(--border-subtle-00);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-04);
}
.modal-header h3 { font: var(--heading-03); }
.modal-close { background: none; border: none; cursor: pointer; color: var(--text-helper); font-size: 22px; line-height: 1; padding: 0; }
.modal-close:hover { color: var(--text-primary); }
.modal-body { padding: var(--spacing-05) var(--spacing-06); overflow-y: auto; font: var(--body-01); color: var(--text-secondary); line-height: 1.55; }
.modal-footer {
  padding: var(--spacing-05) var(--spacing-06);
  border-top: 1px solid var(--border-subtle-00);
  display: flex;
  gap: var(--spacing-03);
  justify-content: flex-end;
}

/* Modal variants */
.modal--alert .modal-header { border-bottom-color: var(--support-error); }
.modal--alert .modal-header h3 { color: var(--support-error); }
.modal--alert .modal-header::before {
  content: '⚠';
  display: inline-flex;
  width: 28px; height: 28px;
  align-items: center; justify-content: center;
  background: var(--support-error); color: var(--ch-css);
  margin-right: var(--spacing-03);
  font-weight: 700;
}
.modal--passive .modal-footer { display: none; }
.modal--wide .modal { max-width: 800px; }
.modal--full .modal { max-width: 1024px; height: calc(100vh - var(--spacing-09)); }

@keyframes ch-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes ch-slide-up { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

/* --- 07.11 · Dropdown --- */
.dropdown { position: relative; display: inline-block; }
.dropdown-trigger {
  width: 100%;
  min-width: 200px;
  height: var(--size-md);
  padding: 0 var(--spacing-04);
  background: var(--field-01);
  border: none;
  border-bottom: 1px solid var(--border-strong-01);
  color: var(--text-primary);
  font: var(--body-01);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-03);
  text-align: left;
}
.dropdown-trigger:hover { background: var(--field-hover-01); }
.dropdown-trigger .chevron { color: var(--icon-secondary); font-size: 10px; transition: transform var(--duration-fast-02); }
.dropdown.open .dropdown-trigger { border-bottom-color: var(--ch-code); }
.dropdown.open .dropdown-trigger .chevron { transform: rotate(180deg); }
.dropdown-menu {
  position: absolute;
  top: 100%; left: 0; right: 0;
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  box-shadow: var(--shadow-02);
  max-height: 280px;
  overflow-y: auto;
  z-index: var(--z-dropdown);
  display: none;
}
.dropdown.open .dropdown-menu { display: block; }
.dropdown-item {
  padding: var(--spacing-03) var(--spacing-04);
  font: var(--body-01);
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
}
.dropdown-item:hover, .dropdown-item.focused { background: var(--background-hover); }
.dropdown-item.selected { background: var(--background-selected); }

/* --- 07.12 · Tooltip --- */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--ch-dos);
  color: var(--ch-css);
  padding: var(--spacing-02) var(--spacing-03);
  font: var(--code-01);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-fast-02);
  z-index: var(--z-tooltip);
}
[data-tooltip]:hover::after,
[data-tooltip]:focus::after,
[data-tooltip]:focus-within::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
[data-theme="dark"] [data-tooltip]::after { background: var(--ch-css); color: var(--ch-dos); }

/* --- 07.13 · Loading / Spinner --- */
.spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border-subtle-01);
  border-top-color: var(--ch-code);
  border-radius: 50%;
  animation: ch-spin 700ms linear infinite;
  display: inline-block;
}
.spinner--sm { width: 16px; height: 16px; border-width: 2px; }
.spinner--lg { width: 64px; height: 64px; border-width: 3px; }
@keyframes ch-spin { to { transform: rotate(360deg); } }

.skeleton {
  background: linear-gradient(90deg, var(--layer-02) 0%, var(--layer-03) 50%, var(--layer-02) 100%);
  background-size: 200% 100%;
  animation: ch-shimmer 1.5s infinite linear;
  border-radius: 2px;
}
@keyframes ch-shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

.progress {
  height: 4px;
  width: 100%;
  background: var(--layer-02);
  position: relative;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: var(--ch-code);
  transition: width var(--duration-moderate-01);
}
.progress--indeterminate .progress-bar {
  width: 30% !important;
  animation: ch-indeterminate 1.5s ease-in-out infinite;
}
@keyframes ch-indeterminate { 0% { margin-left: -30%; } 100% { margin-left: 100%; } }

/* --- 07.14 · Link --- */
.link {
  color: var(--link-primary);
  text-decoration: underline;
  text-decoration-color: var(--ch-code);
  text-underline-offset: 3px;
}
.link:hover { color: var(--link-primary-hover); }
.link--inline { text-decoration: underline; }
.link--standalone {
  text-decoration: none;
  font: var(--label-02);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-02);
}
.link--standalone::after { content: '→'; }
.link--standalone:hover { color: var(--link-primary-hover); }

/* --- 07.15 · Breadcrumb (component) --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-03);
  font: var(--label-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-helper); text-decoration: none; }
.breadcrumb a:hover { color: var(--ch-code-text); }
[data-theme="dark"] .breadcrumb a:hover { color: var(--ch-code); }
.breadcrumb .sep { color: var(--ch-code); }
.breadcrumb [aria-current="page"] { color: var(--text-primary); }

/* --- 07.15.1 · Toggle (switch) --- */
.toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-03);
  cursor: pointer;
  user-select: none;
}
.toggle input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.toggle-track {
  position: relative;
  width: 40px;
  height: 24px;
  background: var(--border-strong-01);
  border-radius: 999px;
  transition: background var(--duration-fast-02);
  flex-shrink: 0;
}
.toggle-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--ch-css);
  border-radius: 50%;
  transition: transform var(--duration-fast-02), background var(--duration-fast-02);
}
.toggle input:checked + .toggle-track { background: var(--ch-code-active); }
[data-theme="dark"] .toggle input:checked + .toggle-track { background: var(--ch-code); }
.toggle input:checked + .toggle-track::after { transform: translateX(16px); }
.toggle input:focus-visible + .toggle-track { outline: 2px solid var(--focus); outline-offset: 2px; }
.toggle input:disabled + .toggle-track { opacity: 0.5; cursor: not-allowed; }
.toggle--sm .toggle-track { width: 32px; height: 18px; }
.toggle--sm .toggle-track::after { width: 14px; height: 14px; top: 2px; left: 2px; }
.toggle--sm input:checked + .toggle-track::after { transform: translateX(14px); }

/* --- 07.15.2 · Slider (range) --- */
.slider {
  display: block;
  width: 100%;
  position: relative;
}
.slider input[type="range"] {
  width: 100%;
  height: 28px;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  cursor: pointer;
}
.slider input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  background: var(--border-strong-01);
}
.slider input[type="range"]::-moz-range-track {
  height: 4px;
  background: var(--border-strong-01);
}
.slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: var(--ch-code);
  border-radius: 50%;
  margin-top: -6px;
  border: 2px solid var(--ch-dos);
  cursor: pointer;
}
.slider input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--ch-code);
  border-radius: 50%;
  border: 2px solid var(--ch-dos);
  cursor: pointer;
}
.slider input[type="range"]:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 4px rgba(50, 250, 150, 0.3);
}
.slider-row { display: grid; grid-template-columns: 1fr 80px; gap: var(--spacing-04); align-items: center; }
.slider-value {
  font: var(--code-02);
  color: var(--text-primary);
  background: var(--field-01);
  padding: var(--spacing-02) var(--spacing-03);
  text-align: center;
  border-bottom: 1px solid var(--border-strong-01);
}

/* --- 07.15.3 · Number input --- */
.number-input {
  display: inline-flex;
  align-items: stretch;
  height: var(--size-md);
  border-bottom: 1px solid var(--border-strong-01);
  background: var(--field-01);
}
.number-input input {
  flex: 1;
  background: transparent;
  border: none;
  text-align: center;
  font: var(--code-02);
  color: var(--text-primary);
  outline: none;
  min-width: 60px;
  padding: 0;
  -moz-appearance: textfield;
}
.number-input input::-webkit-outer-spin-button,
.number-input input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.number-input button {
  width: var(--size-md);
  background: transparent;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  font: 18px/1 var(--font-mono);
  user-select: none;
}
.number-input button:hover { background: var(--field-hover-01); color: var(--ch-code-text); }
[data-theme="dark"] .number-input button:hover { color: var(--ch-code); }
.number-input button:disabled { color: var(--text-disabled); cursor: not-allowed; background: transparent; }
.number-input button:focus-visible { outline: 2px solid var(--focus); outline-offset: -2px; }
.number-input:focus-within { border-bottom-color: var(--ch-code); }

/* --- 07.15.4 · File uploader --- */
.file-uploader {
  border: 1px dashed var(--border-strong-01);
  background: var(--layer-02);
  padding: var(--spacing-07);
  text-align: center;
  transition: all var(--duration-fast-02);
  cursor: pointer;
}
.file-uploader:hover,
.file-uploader.is-dragover {
  border-color: var(--ch-code);
  background: var(--background-selected);
}
.file-uploader input[type="file"] { display: none; }
.file-uploader .uploader-icon {
  font: 32px/1 var(--font-mono);
  color: var(--ch-code-text);
  margin-bottom: var(--spacing-03);
}
[data-theme="dark"] .file-uploader .uploader-icon { color: var(--ch-code); }
.file-uploader .uploader-text {
  font: var(--body-01);
  color: var(--text-secondary);
}
.file-uploader .uploader-text strong { color: var(--text-primary); }
.file-uploader .uploader-hint {
  font: var(--code-01);
  color: var(--text-helper);
  margin-top: var(--spacing-02);
}

.file-list { margin-top: var(--spacing-04); list-style: none; padding: 0; }
.file-list-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-03);
  padding: var(--spacing-03) var(--spacing-04);
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  margin-bottom: var(--spacing-02);
  font: var(--code-02);
}
.file-list-item .file-name { flex: 1; color: var(--text-primary); }
.file-list-item .file-size { color: var(--text-helper); }
.file-list-item .file-remove {
  background: transparent;
  border: none;
  color: var(--text-helper);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}
.file-list-item .file-remove:hover { color: var(--support-error); }

/* --- 07.15.5 · Inline notification (banner persistente) --- */
.notification--inline {
  border-left: 3px solid;
  background: var(--layer-02);
  box-shadow: none;
  margin-bottom: var(--spacing-05);
}
.notification--inline.notification--info { border-left-color: var(--ch-code); }
.notification--inline .notification-body p { color: var(--text-primary); }

/* --- 07.16 · Pagination --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle-00);
  border-bottom: 1px solid var(--border-subtle-00);
  padding: var(--spacing-03) var(--spacing-04);
  font: var(--label-02);
  gap: var(--spacing-04);
  flex-wrap: wrap;
}
.pagination-items { display: flex; align-items: center; gap: var(--spacing-04); }
.pagination button {
  background: transparent; border: none; color: var(--text-primary); cursor: pointer;
  padding: var(--spacing-02) var(--spacing-03);
}
.pagination button:hover { background: var(--background-hover); }
.pagination button[disabled] { color: var(--text-disabled); cursor: not-allowed; }

/* --- 07.17 · Search --- */
.search {
  position: relative;
  width: 100%;
}
.search input {
  width: 100%;
  height: var(--size-md);
  padding: 0 var(--spacing-04) 0 var(--spacing-08);
  background: var(--field-01);
  border: none;
  border-bottom: 1px solid var(--border-strong-01);
  color: var(--text-primary);
  font: var(--body-01);
  outline: none;
}
.search input:focus { border-bottom-color: var(--ch-code); outline: 2px solid var(--ch-code); outline-offset: -2px; }
.search::before {
  content: '◯';
  position: absolute;
  left: var(--spacing-04);
  top: 50%;
  transform: translateY(-50%);
  color: var(--icon-secondary);
  font-family: var(--font-mono);
  font-size: 14px;
}

/* -----------------------------------------------------------------------------
   08 · DOCUMENTATION HELPERS
   ----------------------------------------------------------------------------- */
.demo {
  background: var(--layer-02);
  padding: var(--spacing-07);
  border: 1px solid var(--border-subtle-00);
  margin-bottom: var(--spacing-04);
  position: relative;
}
.demo::before {
  content: '// preview';
  position: absolute;
  top: var(--spacing-02);
  left: var(--spacing-04);
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.demo--center { text-align: center; }
.demo--dark {
  background: var(--ch-dos);
  color: var(--ch-css);
}
.demo--dark::before { color: var(--ch-java); }
.demo--checker {
  background:
    repeating-linear-gradient(45deg, var(--layer-01) 0 8px, var(--layer-02) 8px 16px);
}
.demo--padded { padding: var(--spacing-09) var(--spacing-08); }

.anatomy {
  background: var(--logo-stage-bg);
  padding: var(--spacing-07) var(--spacing-08);
  border: 1px solid var(--logo-stage-border);
  text-align: center;
}
.anatomy svg { max-width: 100%; height: auto; }
.anatomy-legend {
  margin-top: var(--spacing-05);
  display: grid;
  gap: var(--spacing-02);
  font: var(--code-02);
  text-align: left;
}
.anatomy-legend li {
  display: flex;
  gap: var(--spacing-03);
  list-style: none;
  color: var(--text-secondary);
}
.anatomy-legend li::before {
  content: counter(anatomy, decimal-leading-zero);
  counter-increment: anatomy;
  color: var(--ch-code-text);
  flex-shrink: 0;
  font-weight: 600;
}
[data-theme="dark"] .anatomy-legend li::before { color: var(--ch-code); }
.anatomy-legend { counter-reset: anatomy; }

.api-table { width: 100%; border-collapse: collapse; }
.api-table th, .api-table td {
  padding: var(--spacing-04) var(--spacing-05);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle-00);
  font: var(--code-02);
  vertical-align: top;
}
.api-table th {
  font: var(--label-01);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-helper);
  background: var(--layer-02);
}
.api-table td:nth-child(1) {
  color: var(--ch-code-text);
  white-space: nowrap;
  font-weight: 500;
}
[data-theme="dark"] .api-table td:nth-child(1) { color: var(--ch-code); }
.api-table td:nth-child(2) { color: var(--text-helper); }

.do-dont {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-05);
}
.do-dont .tile {
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  position: relative;
  padding-top: var(--spacing-08);
}
.do-dont .tile h4 {
  display: flex;
  align-items: center;
  gap: var(--spacing-03);
  font: var(--heading-02);
  margin-bottom: var(--spacing-04);
}
.do-dont .do h4::before {
  content: '✓';
  width: 24px; height: 24px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--ch-code); color: var(--ch-dos);
  font-weight: 700;
}
.do-dont .dont h4::before {
  content: '✗';
  width: 24px; height: 24px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--support-error); color: var(--ch-css);
  font-weight: 700;
}
.do-dont ul { list-style: none; }
.do-dont li {
  padding: var(--spacing-03) 0;
  border-bottom: 1px solid var(--border-subtle-00);
  font: var(--body-01);
  color: var(--text-secondary);
}
.do-dont li:last-child { border-bottom: none; }
.do-dont li::before { content: '→ '; color: var(--ch-code); }

/* Color swatches */
.token-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border-subtle-00);
  border: 1px solid var(--border-subtle-00);
}
.token-tile {
  background: var(--layer-01);
  cursor: pointer;
  transition: transform var(--duration-fast-02);
  min-height: 180px;
  display: flex;
  flex-direction: column;
}
.token-swatch {
  flex: 1;
  min-height: 100px;
  position: relative;
}
.token-swatch .hex {
  position: absolute;
  top: var(--spacing-03);
  right: var(--spacing-03);
  font: var(--code-01);
  color: rgba(255,255,255,0.6);
}
.token-swatch.light .hex { color: rgba(60,67,60,0.5); }
.token-info {
  padding: var(--spacing-04);
  background: var(--layer-01);
  border-top: 1px solid var(--border-subtle-00);
}
.token-info .name { font: var(--label-02); display: block; margin-bottom: var(--spacing-01); }
.token-info .role { font: var(--helper-text-01); color: var(--text-helper); display: block; }
.token-info .role::before { content: '// '; color: var(--ch-code); }

/* Status badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-02);
  font: var(--code-01);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border: 1px solid;
}
.status-badge--stable { color: var(--ch-code-text); border-color: var(--ch-code-text); }
[data-theme="dark"] .status-badge--stable { color: var(--ch-code); border-color: var(--ch-code); }
.status-badge--beta   { color: var(--ch-script); border-color: var(--ch-script); }
.status-badge--new    { background: var(--ch-code); color: var(--ch-dos); border-color: var(--ch-code); }
.status-badge--draft  { color: var(--text-helper); border-color: var(--border-subtle-01); }

/* ----- Status dot · indicador de estado de sistema ---------------------- */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ch-java);
  flex-shrink: 0;
  position: relative;
}
.status-dot--online  { background: var(--ch-code-active); }
[data-theme="dark"] .status-dot--online { background: var(--ch-code); }
.status-dot--offline { background: var(--ch-java); }
.status-dot--sync {
  background: var(--ch-code);
  animation: ch-dot-pulse 1.4s ease-in-out infinite;
}
.status-dot--sync::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--ch-code);
  opacity: 0.25;
  animation: ch-dot-ripple 1.4s ease-out infinite;
}
.status-dot--error   { background: var(--support-error); }
.status-dot--warning { background: var(--support-warning); }
@keyframes ch-dot-pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.15); } }
@keyframes ch-dot-ripple { 0% { transform: scale(0.8); opacity: 0.35; } 100% { transform: scale(2.2); opacity: 0; } }

/* ----- Callout box · usa a paleta secundária completa ---------------------- */
.callout {
  padding: var(--spacing-05) var(--spacing-06);
  border-left: 3px solid;
  margin: var(--spacing-05) 0;
  background: var(--layer-02);
  font: var(--body-01);
  color: var(--text-secondary);
  line-height: 1.55;
  display: flex;
  gap: var(--spacing-04);
  align-items: flex-start;
}
.callout::before {
  content: attr(data-icon);
  font: var(--label-02);
  flex-shrink: 0;
  width: 24px;
  line-height: 1.4;
}
.callout strong { display: block; margin-bottom: var(--spacing-02); color: var(--text-primary); font: var(--heading-02); }

.callout--info     { border-left-color: var(--sec-guidelines); background: var(--sec-guidelines-soft); }
.callout--info::before    { color: var(--sec-guidelines); content: 'ⓘ'; }

.callout--success  { border-left-color: var(--ch-code-text); background: var(--background-selected); }
.callout--success::before { color: var(--ch-code-text); content: '✓'; }
[data-theme="dark"] .callout--success::before { color: var(--ch-code); }

.callout--warning  { border-left-color: var(--sec-dataviz); background: var(--sec-dataviz-soft); }
.callout--warning::before { color: var(--sec-dataviz); content: '⚠'; }

.callout--ai       { border-left-color: var(--sec-components); background: var(--sec-components-soft); }
.callout--ai::before      { color: var(--sec-components); content: '◆'; }

.callout--brand    { border-left-color: var(--sec-patterns); background: var(--sec-patterns-soft); }
.callout--brand::before   { color: var(--sec-patterns); content: '◇'; }

.callout--tip      { border-left-color: var(--sec-foundations); background: var(--sec-foundations-soft); }
.callout--tip::before     { color: var(--ch-code-text); content: '→'; }
[data-theme="dark"] .callout--tip::before { color: var(--ch-code); }

/* ----- Section eyebrow · cor da seção ---------------------------------- */
.section-eyebrow {
  display: inline-block;
  font: var(--label-01);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-helper);
  padding: 2px 0 2px var(--spacing-04);
  border-left: 3px solid;
  margin: var(--spacing-02) 0 var(--spacing-04);
  line-height: 1.4;
}
.section-eyebrow::before {
  content: '// ';
  color: inherit;
  opacity: 0.5;
}
.section-eyebrow--foundations { border-left-color: var(--sec-foundations); }
.section-eyebrow--guidelines  { border-left-color: var(--sec-guidelines); }
.section-eyebrow--components  { border-left-color: var(--sec-components); }
.section-eyebrow--patterns    { border-left-color: var(--sec-patterns); }
.section-eyebrow--dataviz     { border-left-color: var(--sec-dataviz); }
.section-eyebrow--brand       { border-left-color: var(--sec-brand); }
.section-eyebrow--help        { border-left-color: var(--sec-help); }

/* ----- Submarca chip · auto-styled por data-submarca attribute ----------- */
.submarca-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-02);
  padding: var(--spacing-02) var(--spacing-04);
  font: var(--label-01);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 0;
  background: var(--tag-default-bg);
  color: var(--tag-default-fg);
}
.submarca-chip { font-weight: 500; }
/* sem ◆ — chip identifica-se sozinho pela cor signature da submarca */
.submarca-chip[data-submarca="hackerclubes"]    { background: var(--ch-sub-hackerclubes);    color: var(--ch-sub-hackerclubes-fg); }
.submarca-chip[data-submarca="inclusao-tech"]   { background: var(--ch-sub-inclusao-tech);   color: var(--ch-sub-inclusao-tech-fg); }
.submarca-chip[data-submarca="internet-segura"] { background: var(--ch-sub-internet-segura); color: var(--ch-sub-internet-segura-fg); }
.submarca-chip[data-submarca="minas-em-tech"]   { background: var(--ch-sub-minas-em-tech);   color: var(--ch-sub-minas-em-tech-fg); }
.submarca-chip[data-submarca="mao-na-massa"]    { background: var(--ch-sub-mao-na-massa);    color: var(--ch-sub-mao-na-massa-fg); }
.submarca-chip[data-submarca="perifa-impacto"]  { background: var(--ch-sub-perifa-impacto);  color: var(--ch-sub-perifa-impacto-fg); }

/* Resource cards (for "Related" sections) */
.resource-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--spacing-04);
}
.resource-card {
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  padding: var(--spacing-05);
  text-decoration: none;
  color: inherit;
  display: block;
  transition: all var(--duration-fast-02);
  position: relative;
}
.resource-card:hover {
  border-color: var(--ch-code);
  color: inherit;
}
.resource-card:hover::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 2px;
  background: var(--ch-code);
}

/* Submarca card: barra colorida superior sempre visível + intensifica no hover */
.resource-card--sub::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 4px;
  background: var(--card-accent, var(--ch-code));
  opacity: 0.75;
  transition: opacity var(--duration-fast-02);
}
.resource-card--sub:hover { border-color: var(--card-accent, var(--ch-code)); }
.resource-card--sub:hover::before { opacity: 1; height: 6px; }
.resource-card--sub .meta { margin-bottom: var(--spacing-04); }
.resource-card .meta {
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-03);
}
.resource-card .meta::before { content: '// '; color: var(--ch-code); }
.resource-card h4 { font: var(--heading-02); margin-bottom: var(--spacing-02); }
.resource-card p { font: var(--body-01); color: var(--text-secondary); line-height: 1.5; }
.resource-card .cta {
  font: var(--label-02);
  color: var(--ch-code-text);
  margin-top: var(--spacing-04);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-02);
}
[data-theme="dark"] .resource-card .cta { color: var(--ch-code); }
.resource-card .cta::after { content: '→'; transition: transform var(--duration-fast-02); }
.resource-card:hover .cta::after { transform: translateX(4px); }

/* -----------------------------------------------------------------------------
   09 · PATTERNS · BIT divider, hero-h
   ----------------------------------------------------------------------------- */
.bit-divider {
  display: flex;
  gap: var(--spacing-02);
  margin: var(--spacing-09) 0;
  flex-wrap: wrap;
}
.bit-divider span { width: 4px; height: 4px; background: var(--ch-code); opacity: 0.3; }
.bit-divider span:nth-child(3n) { opacity: 1; }

.h-symbol {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
}
.h-symbol span { background: transparent; }
.h-symbol span.on { background: var(--ch-code); }
.h-symbol--dark span.on { background: var(--ch-dos); }
[data-theme="dark"] .h-symbol--dark span.on { background: var(--ch-css); }

/* H · loading: acende quadrado por quadrado em sequência */
.h-symbol--loading span.on {
  animation: ch-h-pixel-in 1200ms var(--ease-productive) infinite;
}
.h-symbol--loading span.on:nth-child(1) { animation-delay: 0ms; }
.h-symbol--loading span.on:nth-child(3) { animation-delay: 100ms; }
.h-symbol--loading span.on:nth-child(5) { animation-delay: 200ms; }
.h-symbol--loading span.on:nth-child(6) { animation-delay: 300ms; }
.h-symbol--loading span.on:nth-child(7) { animation-delay: 400ms; }
.h-symbol--loading span.on:nth-child(9) { animation-delay: 500ms; }
@keyframes ch-h-pixel-in {
  0%, 60%, 100% { opacity: 1; transform: scale(1); }
  10% { opacity: 0; transform: scale(0.4); }
  30% { opacity: 1; transform: scale(1.1); }
}

/* H · breathing: pulsa suavemente quando há atividade */
.h-symbol--breathing {
  animation: ch-h-breathe 2.4s ease-in-out infinite;
}
@keyframes ch-h-breathe {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

/* H · hover lift: micro-tilt ao hover */
.h-symbol--hover { transition: transform var(--duration-fast-02) var(--ease-productive); }
.h-symbol--hover:hover { transform: rotate(-3deg) scale(1.08); }

/* H · glitch raro · easter egg ativado via JS pontual */
.h-symbol--glitch span.on {
  animation: ch-h-glitch 220ms linear;
}
@keyframes ch-h-glitch {
  0%   { transform: translate(0); }
  20%  { transform: translate(-2px, 1px); background: var(--ch-sec-r); }
  40%  { transform: translate(2px, -1px); background: var(--ch-sec-b); }
  60%  { transform: translate(-1px, -1px); background: var(--ch-code); }
  100% { transform: translate(0); background: var(--ch-code); }
}

/* Mini h-symbol no shell header com hover */
.shell-brand:hover .h-mini { animation: ch-h-breathe 1.4s ease-in-out infinite; }

/* -----------------------------------------------------------------------------
   EASTER EGG · TERMINAL MODE (Konami code)
   ----------------------------------------------------------------------------- */
html.ch-terminal-mode {
  --background: #000;
  --layer-01: #0a0a0a;
  --layer-02: #111;
  --layer-03: #1a1a1a;
  --text-primary: var(--ch-code);
  --text-secondary: #5CFFAA;
  --text-helper: #2EBE7A;
  --text-on-color: #000;
  --border-subtle-00: #1c4a30;
  --border-subtle-01: #2EBE7A;
  --link-primary: var(--ch-code);
}
html.ch-terminal-mode body,
html.ch-terminal-mode .main,
html.ch-terminal-mode .t-body-01,
html.ch-terminal-mode .t-body-02 {
  font-family: var(--font-pixel), var(--font-mono) !important;
  font-size: 18px;
}
html.ch-terminal-mode .shell-header { background: #000; border-bottom-color: var(--ch-code); }
html.ch-terminal-mode .sidebar { background: #0a0a0a; }

.ch-easter-tip {
  position: fixed;
  bottom: var(--spacing-09);
  left: 50%;
  transform: translateX(-50%);
  background: var(--ch-dos);
  color: var(--ch-code);
  padding: var(--spacing-04) var(--spacing-06);
  font: var(--code-02);
  z-index: var(--z-toast);
  border: 1px solid var(--ch-code);
  animation: ch-fade-in var(--duration-fast-02);
  font-family: var(--font-pixel);
}

/* -----------------------------------------------------------------------------
   PLAYGROUND · controles interativos pra demos de componentes
   ----------------------------------------------------------------------------- */
.playground {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 0;
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  margin-bottom: var(--spacing-05);
}
.playground-preview {
  padding: var(--spacing-08);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--layer-02);
  border-right: 1px solid var(--border-subtle-00);
  min-height: 200px;
}
.playground-controls { padding: var(--spacing-05); }
.playground-controls h5 {
  font: var(--label-01);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-helper);
  margin-bottom: var(--spacing-04);
}
.playground-controls h5::before { content: '// '; color: var(--ch-code); }
.playground-control { margin-bottom: var(--spacing-04); }
.playground-control label {
  display: block;
  font: var(--label-02);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-02);
}
.playground-control select,
.playground-control input[type="text"] {
  width: 100%;
  height: 32px;
  background: var(--field-01);
  border: none;
  border-bottom: 1px solid var(--border-strong-01);
  padding: 0 var(--spacing-03);
  font: var(--code-02);
  color: var(--text-primary);
  outline: none;
}
.playground-control select:focus,
.playground-control input:focus { border-bottom-color: var(--ch-code); }
.playground-control-checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-03);
  font: var(--body-01);
  color: var(--text-primary);
  cursor: pointer;
}
.playground-code {
  background: var(--code-snippet-bg);
  color: var(--code-snippet-fg);
  padding: var(--spacing-04);
  font: var(--code-02);
  overflow-x: auto;
  white-space: pre;
  border-top: 1px solid var(--border-subtle-00);
  grid-column: 1 / -1;
}
@media (max-width: 800px) {
  .playground { grid-template-columns: 1fr; }
  .playground-preview { border-right: none; border-bottom: 1px solid var(--border-subtle-00); }
}

/* -----------------------------------------------------------------------------
   GRAFISMOS · helpers de uso in-context
   ----------------------------------------------------------------------------- */
.bg-grafismo {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}
.bg-grafismo::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.06;
  background-repeat: repeat;
  background-size: 48px 48px;
  pointer-events: none;
}
.bg-grafismo--checker::before {
  background-image: repeating-linear-gradient(45deg, var(--ch-code) 0 8px, transparent 8px 16px);
}
.bg-grafismo--dots::before {
  background-image: radial-gradient(circle at center, var(--ch-code) 2px, transparent 2px);
  background-size: 16px 16px;
  opacity: 0.12;
}
.bg-grafismo--iso::before {
  background-image: linear-gradient(135deg, var(--ch-code) 25%, transparent 25%), linear-gradient(225deg, var(--ch-code) 25%, transparent 25%);
  background-size: 24px 24px;
  opacity: 0.08;
}

/* -----------------------------------------------------------------------------
   10 · UTILITIES
   ----------------------------------------------------------------------------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-05); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-05); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-05); }
.grid-auto-md { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--spacing-05); }
.grid-auto-lg { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: var(--spacing-05); }

.stack > * + * { margin-top: var(--spacing-04); }
.stack-05 > * + * { margin-top: var(--spacing-05); }
.stack-06 > * + * { margin-top: var(--spacing-06); }
.stack-07 > * + * { margin-top: var(--spacing-07); }

.row { display: flex; gap: var(--spacing-04); align-items: center; flex-wrap: wrap; }
.row-between { display: flex; gap: var(--spacing-04); align-items: center; justify-content: space-between; flex-wrap: wrap; }
.row-baseline { display: flex; gap: var(--spacing-04); align-items: baseline; flex-wrap: wrap; }

.center-y { display: flex; align-items: center; }

.text-center { text-align: center; }
.text-helper { color: var(--text-helper); }
.text-secondary { color: var(--text-secondary); }

.max-w-xs { max-width: 480px; }
.max-w-sm { max-width: 600px; }
.max-w-md { max-width: var(--container-md); }
.max-w-lg { max-width: var(--container-lg); }
.max-w-card { max-width: 320px; }

/* Prose · coluna de leitura confortável (paragraphs de doc) */
.prose { max-width: 720px; }

/* Alinhamento centralizado pra wrapping flex */
.justify-center { justify-content: center; }
.gap-06 { gap: var(--spacing-06); }
.gap-07 { gap: var(--spacing-07); }
.gap-08 { gap: var(--spacing-08); }

.mt-04 { margin-top: var(--spacing-04); }
.mt-05 { margin-top: var(--spacing-05); }
.mt-06 { margin-top: var(--spacing-06); }
.mt-07 { margin-top: var(--spacing-07); }
.mb-04 { margin-bottom: var(--spacing-04); }
.mb-05 { margin-bottom: var(--spacing-05); }
.mb-06 { margin-bottom: var(--spacing-06); }
.mb-07 { margin-bottom: var(--spacing-07); }

.hide-mobile { }
.show-mobile { display: none; }
.is-hidden { display: none !important; }

ul.bare, ol.bare { list-style: none; padding: 0; }
ul.checklist li, ol.checklist li {
  padding: var(--spacing-03) 0;
  border-bottom: 1px solid var(--border-subtle-00);
  list-style: none;
  font: var(--body-01);
  color: var(--text-secondary);
}
ul.checklist li::before { content: '→ '; color: var(--ch-code); }

kbd {
  font: var(--code-01);
  background: var(--layer-02);
  border: 1px solid var(--border-subtle-01);
  padding: 1px 6px;
  border-radius: 2px;
  color: var(--text-primary);
}

/* -----------------------------------------------------------------------------
   11 · THEME TOGGLE (in header) · BACK-TO-TOP · PAGE NAV
   ----------------------------------------------------------------------------- */
/* -----------------------------------------------------------------------------
   COMMAND PALETTE (Cmd/Ctrl+K)
   ----------------------------------------------------------------------------- */
.cmdk-backdrop {
  position: fixed; inset: 0;
  background: rgba(60, 67, 60, 0.55);
  z-index: var(--z-modal);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}
.cmdk-backdrop.open { display: flex; }
.cmdk {
  background: var(--layer-01);
  width: 100%;
  max-width: 640px;
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-04);
  border: 1px solid var(--border-subtle-00);
  animation: ch-slide-up var(--duration-moderate-02) var(--ease-entrance);
}
.cmdk-input-wrap {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-subtle-00);
  padding: 0 var(--spacing-05);
  gap: var(--spacing-03);
}
.cmdk-input-wrap::before {
  content: '/';
  font: 600 18px/1 var(--font-mono);
  color: var(--ch-code-text);
}
[data-theme="dark"] .cmdk-input-wrap::before { color: var(--ch-code); }
.cmdk-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font: var(--body-02);
  color: var(--text-primary);
  padding: var(--spacing-05) 0;
}
.cmdk-kbd-hint {
  font: var(--code-01);
  color: var(--text-helper);
  background: var(--layer-02);
  padding: 2px 6px;
  border: 1px solid var(--border-subtle-01);
}
.cmdk-list {
  overflow-y: auto;
  flex: 1;
  padding: var(--spacing-03) 0;
  list-style: none;
  margin: 0;
}
.cmdk-section-label {
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--spacing-04) var(--spacing-05) var(--spacing-02);
}
.cmdk-section-label::before { content: '// '; color: var(--ch-code); }
.cmdk-item {
  padding: var(--spacing-03) var(--spacing-05);
  cursor: pointer;
  border-left: 2px solid transparent;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.cmdk-item:hover, .cmdk-item.focused {
  background: var(--background-hover);
  border-left-color: var(--ch-code);
}
.cmdk-item-title { font: var(--body-01); color: var(--text-primary); font-weight: 500; }
.cmdk-item-desc { font: var(--code-01); color: var(--text-helper); }
.cmdk-item-section { font: var(--code-01); color: var(--text-helper); }
.cmdk-item-section::before { content: '→ '; color: var(--ch-code); }
.cmdk-empty {
  padding: var(--spacing-07);
  text-align: center;
  color: var(--text-helper);
  font: var(--body-01);
}
.cmdk-footer {
  border-top: 1px solid var(--border-subtle-00);
  padding: var(--spacing-03) var(--spacing-05);
  display: flex;
  gap: var(--spacing-05);
  font: var(--code-01);
  color: var(--text-helper);
  flex-wrap: wrap;
}
.cmdk-footer kbd { font: var(--code-01); background: var(--layer-02); border: 1px solid var(--border-subtle-01); padding: 1px 6px; border-radius: 2px; color: var(--text-primary); }

.shell-theme-toggle {
  background: transparent;
  border: 1px solid transparent;
  color: var(--ch-inspect);
  cursor: pointer;
  padding: var(--spacing-02) var(--spacing-03);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast-02);
  width: 32px;
  height: 32px;
}
.shell-theme-toggle:hover { color: var(--ch-code); border-color: rgba(255,255,255,0.1); }
.shell-theme-toggle:focus-visible { outline: 2px solid var(--ch-code); outline-offset: 2px; }
.shell-theme-toggle .theme-icon { color: currentColor; }
/* Light mode atual → mostra lua (clique vai pro dark) */
.shell-theme-toggle .theme-icon--sun  { display: none; }
.shell-theme-toggle .theme-icon--moon { display: block; }
/* Dark mode atual → mostra sol (clique vai pro light) */
[data-theme="dark"] .shell-theme-toggle .theme-icon--sun  { display: block; }
[data-theme="dark"] .shell-theme-toggle .theme-icon--moon { display: none; }

.back-to-top {
  position: fixed;
  bottom: var(--spacing-05);
  right: var(--spacing-05);
  width: 44px;
  height: 44px;
  background: var(--ch-dos);
  color: var(--ch-css);
  border: 1px solid var(--ch-code);
  font: 600 18px/1 var(--font-mono);
  cursor: pointer;
  z-index: var(--z-overlay);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity var(--duration-fast-02), transform var(--duration-fast-02);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--ch-code); color: var(--ch-dos); }
.back-to-top:focus-visible { outline: 2px solid var(--ch-code); outline-offset: 2px; }

.page-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-05);
  margin-top: var(--spacing-10);
  padding-top: var(--spacing-07);
  border-top: 1px solid var(--border-subtle-00);
}
.page-nav-link {
  display: block;
  padding: var(--spacing-05) var(--spacing-06);
  background: var(--layer-01);
  border: 1px solid var(--border-subtle-00);
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-fast-02);
}
.page-nav-link:hover { border-color: var(--ch-code); color: inherit; }
.page-nav-label {
  display: block;
  font: var(--code-01);
  color: var(--text-helper);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-02);
}
.page-nav-title { font: var(--heading-02); color: var(--text-primary); }
.page-nav-next { text-align: right; }
@media (max-width: 600px) {
  .page-nav { grid-template-columns: 1fr; }
  .page-nav-next { text-align: left; }
}

/* -----------------------------------------------------------------------------
   12 · PRINT
   ----------------------------------------------------------------------------- */
@media print {
  /* Esconde elementos não-imprimíveis */
  .shell-header, .sidebar, .sidebar-backdrop, .theme-toggle, .shell-theme-toggle,
  .menu-toggle, .skip-link, .code-copy, .back-to-top, .a11y-bar, .a11y-bar-toggle,
  .toast-stack, .command-palette-backdrop, .page-nav { display: none !important; }
  .shell-container { grid-template-columns: 1fr; display: block; }
  .main { max-width: 100%; padding: 0; }
  body { background: white; color: black; font-size: 11pt; }

  /* Page setup com URL e timestamp no rodapé */
  @page {
    margin: 18mm 16mm 22mm;
    @bottom-left { content: "Casa Hacker DS · v1.0"; font-size: 9pt; color: #666; }
    @bottom-right { content: counter(page) " / " counter(pages); font-size: 9pt; color: #666; }
  }

  a { color: black; text-decoration: underline; }
  a[href^="http"]::after { content: ' (' attr(href) ')'; font-size: 0.85em; color: #666; }
  a[href^="#"]::after, a[href^="mailto:"]::after { content: ''; }

  /* Cabeçalhos não devem ficar órfãos no fim da página */
  h1, h2, h3, h4 { page-break-after: avoid; break-after: avoid; }
  h1 + *, h2 + *, h3 + * { page-break-before: avoid; }

  /* Conteúdo que precisa permanecer agrupado */
  .section, .demo, .anatomy, .tile, .resource-card, .token-tile,
  .do-dont, .api-table tr, .data-table tr, .callout {
    page-break-inside: avoid;
    break-inside: avoid;
  }

  /* Code snippets imprimem em escala de cinza */
  .code-snippet {
    background: #f4f4f4 !important;
    color: #333 !important;
    border: 1px solid #ccc;
    white-space: pre-wrap;
    overflow: visible;
    page-break-inside: avoid;
  }
  .code-snippet .k, .code-snippet .s, .code-snippet .c, .code-snippet .v, .code-snippet .n { color: #333; }

  /* Imprime backgrounds (necessário pra paletas de cor) */
  .token-swatch, .demo, .callout, .submarca-chip, .tag, .btn--primary {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  /* Quebra forçada antes de section principais em páginas longas */
  .page-header { page-break-after: avoid; }

  /* Esconde elementos puramente decorativos */
  .hero-h, .bit-divider, .h-symbol { display: none !important; }

  /* Show TOC mais compacto */
  .toc { background: transparent; border: 1px solid #ccc; padding: 8mm; }
  .toc ol { columns: 2; column-gap: 6mm; }

  /* Imprime URL canônica no topo */
  .page-header::before {
    content: 'casahacker.github.io/design-system';
    display: block;
    font-size: 8pt;
    color: #999;
    margin-bottom: 4mm;
    font-family: monospace;
  }
}

/* -----------------------------------------------------------------------------
   13 · RESPONSIVE
   ----------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .shell-container { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: 48px; left: 0;
    width: 280px;
    height: calc(100vh - 48px);
    transform: translateX(-100%);
    transition: transform var(--duration-moderate-02) var(--ease-productive);
    z-index: var(--z-modal);
    box-shadow: var(--shadow-02);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop {
    position: fixed;
    inset: 48px 0 0 0;
    background: rgba(60, 67, 60, 0.5);
    z-index: calc(var(--z-modal) - 1);
    display: none;
  }
  .sidebar-backdrop.open { display: block; }
  .shell-header .menu-toggle { display: inline-flex; }
  .main { padding: var(--spacing-07) var(--spacing-06); }
  .token-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .do-dont { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .token-grid { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .main { padding: var(--spacing-06) var(--spacing-05); }
  .page-title { font: var(--heading-05); }
  .section-head { flex-direction: column; align-items: flex-start; gap: var(--spacing-02); }
  .section-head h2 { font: var(--heading-03); }
  .demo { padding: var(--spacing-05); }
  .anatomy { padding: var(--spacing-05); }
  .modal { max-height: calc(100vh - var(--spacing-07)); }
  .modal-header, .modal-body, .modal-footer { padding: var(--spacing-04); }
  .show-mobile { display: initial; }
  .hide-mobile { display: none; }
  .shell-actions .shell-link.optional-mobile { display: none; }
  .quick-stats { grid-template-columns: 1fr 1fr !important; }
  .section-cards { grid-template-columns: 1fr !important; }
}

@media (max-width: 400px) {
  .main { padding: var(--spacing-05) var(--spacing-04); }
  .page-title { font: var(--heading-04); }
}