/* ─── Brand tokens ─────────────────────────────────────────── */
@font-face {
  font-family: "PP Editorial New";
  src: url("fonts/PPEditorialNew-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "PP Editorial New";
  src: url("fonts/PPEditorialNew-Italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Helvetica";
  src: url("fonts/helvetica/helvetica-light-587ebe5a59211.ttf") format("truetype");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Helvetica";
  src: url("fonts/helvetica/Helvetica.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Helvetica";
  src: url("fonts/helvetica/Helvetica-Oblique.ttf") format("truetype");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Helvetica";
  src: url("fonts/helvetica/Helvetica-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Helvetica";
  src: url("fonts/helvetica/Helvetica-BoldOblique.ttf") format("truetype");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

:root {
  /* Core palette */
  --color-bg: #f8f3ef;
  --color-surface: #ffffff;
  --color-text: #481701;
  --color-text-secondary: #6b4423;
  --color-text-muted: #9a7b63;
  --color-accent-soft: #9ec6f1;
  --color-accent: #4a7fa8;
  --color-accent-hover: #6a9bc4;
  /* Surface contrast — on white/cream/light fills, readable blue is always deep sky */
  --color-accent-on-light: var(--color-accent);
  --color-accent-on-dark: var(--color-accent-soft);
  --color-border: #e8dfd6;
  --color-dark: #2e1200;

  /* Blue scale — 1 (lightest) → 9 (darkest) */
  --color-blue-1: #f3f8fc;
  --color-blue-2: #e4eff9;
  --color-blue-3: #d1e4f6;
  --color-blue-4: #bad6f2;
  --color-blue-5: #9ec6f1;
  --color-blue-6: #79b0e8;
  --color-blue-7: #4a7fa8;
  --color-blue-8: #2e5a7a;
  --color-blue-9: #162e3f;

  /* Brown scale — 1 (lightest) → 9 (darkest) */
  --color-brown-1: #f8f3ef;
  --color-brown-2: #ede5dc;
  --color-brown-3: #e0d5c8;
  --color-brown-4: #cfbeaa;
  --color-brown-5: #b89978;
  --color-brown-6: #926947;
  --color-brown-7: #6b4423;
  --color-brown-8: #481701;
  --color-brown-9: #2e1200;

  /* Typography */
  --font-heading: "PP Editorial New", "Times New Roman", Georgia, serif;
  --font-body: "Helvetica", "Helvetica Neue", Arial, sans-serif;

  /* Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: clamp(2.5rem, 5vw, 3.75rem);
  --text-5xl: clamp(3rem, 7vw, 5.5rem);

  /* Spacing (8pt grid) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Card spacing — 8pt grid, fluid between breakpoints (shared UI lab + marketing cards) */
  --card-padding: clamp(0.75rem, 0.625rem + 0.5vw, 1rem); /* 12–16px */
  --card-padding-sm: clamp(0.625rem, 0.5rem + 0.35vw, 0.75rem); /* 10–12px */
  --card-padding-lg: clamp(1rem, 0.75rem + 0.85vw, 1.5rem); /* 16–24px */
  --card-gap: clamp(0.625rem, 0.5rem + 0.35vw, 0.75rem); /* 10–12px */
  --card-gap-sm: clamp(0.375rem, 0.3rem + 0.25vw, 0.5rem); /* 6–8px */
  --card-grid-gap: clamp(0.625rem, 0.5rem + 0.35vw, 0.75rem); /* 10–12px */

  /* Layout */
  --max-width: 72rem;
  --content-width: 42rem;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --duration-fast: 180ms;
  --duration-base: 280ms;
  --duration-slow: 480ms;

  /* Shadows — warm, not gray */
  --shadow-sm: 0 1px 2px rgba(72, 23, 1, 0.04);
  --shadow-md: 0 8px 24px rgba(72, 23, 1, 0.08);
  --shadow-lg: 0 20px 48px rgba(72, 23, 1, 0.1);
}

/* ─── Reset & base ─────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--color-accent-hover);
}

::selection {
  background: rgba(158, 198, 241, 0.45);
  color: var(--color-text);
}

/* ─── Layout shell ─────────────────────────────────────────── */
.page {
  min-height: 100dvh;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 15rem;
  height: 100dvh;
  padding: var(--space-8) var(--space-6);
  border-right: 1px solid var(--color-border);
  background: rgba(248, 243, 239, 0.92);
  backdrop-filter: blur(12px);
  z-index: 20;
  overflow-y: auto;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: inherit;
}

.brand-name__first {
  font-style: normal;
  color: inherit;
}

.brand-name__last {
  font-style: italic;
  color: var(--color-accent-soft);
}

.sidebar__brand {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: 1.15;
  color: var(--color-text);
  margin: 0 0 var(--space-8);
}

.sidebar__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4);
}

.sidebar__nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.sidebar__nav a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.sidebar__nav a:hover,
.sidebar__nav a.is-active {
  background: var(--color-surface);
  color: var(--color-text);
}

.main {
  margin-left: 15rem;
}

.section {
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  padding-inline: clamp(var(--space-5), 4vw, var(--space-10));
  border-bottom: 1px solid var(--color-border);
}

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-4);
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-6);
  max-width: 18ch;
}

.section__lead {
  font-size: clamp(var(--text-base), 1.5vw + 0.75rem, var(--text-lg));
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: var(--content-width);
  margin: 0 0 clamp(var(--space-8), 5vw, var(--space-12));
}

/* ─── Hero ─────────────────────────────────────────────────── */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: var(--space-20) var(--space-10);
  background:
    radial-gradient(ellipse 80% 60% at 100% 0%, rgba(158, 198, 241, 0.35), transparent 55%),
    radial-gradient(ellipse 60% 50% at 0% 100%, rgba(72, 23, 1, 0.06), transparent 50%),
    var(--color-bg);
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.hero__tag {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.6);
  color: var(--color-text-secondary);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0 0 var(--space-8);
  max-width: 16ch;
}

.hero__title em {
  font-style: italic;
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: var(--text-xl);
  line-height: 1.55;
  color: var(--color-text-secondary);
  max-width: 34ch;
  margin: 0 0 var(--space-10);
}

.hero__palette {
  display: flex;
  gap: var(--space-3);
}

.hero__swatch {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(72, 23, 1, 0.08);
  box-shadow: var(--shadow-sm);
}

/* ─── Reveal animation ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ─── Psychology cards ───────────────────────────────────────── */
.psych-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: var(--space-6);
}

.psych-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.psych-card__principle {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-3);
}

.psych-card__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.15;
  margin: 0 0 var(--space-4);
}

.psych-card__body {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.65;
}

/* ─── Color system ───────────────────────────────────────────── */
.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-6);
}

.color-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.color-card__swatch {
  height: 8rem;
  position: relative;
}

.color-card__swatch--light {
  border-bottom: 1px solid var(--color-border);
}

.color-card__body {
  padding: var(--space-5);
}

.color-card__name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  margin: 0 0 var(--space-2);
}

.color-card__hex {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}

.color-card__role {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-4);
  line-height: 1.5;
}

.color-card__copy {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.color-card__copy:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.color-card__copy:active {
  transform: scale(0.97);
}

.color-card__copy.is-copied {
  color: var(--color-accent);
  border-color: var(--color-accent-soft);
  background: rgba(158, 198, 241, 0.15);
}

/* ─── Tonal scales (9 steps) ─────────────────────────────────── */
.scale-section {
  margin-top: var(--space-16);
}

.scale-section + .scale-section {
  margin-top: var(--space-12);
}

.scale-section__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-2);
}

.scale-section__lead {
  margin: 0 0 var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 52ch;
}

.scale-ramp {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.scale-ramp__strip {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
}

.scale-ramp__step {
  position: relative;
  min-height: 7rem;
  padding: var(--space-3);
  border: none;
  border-right: 1px solid rgba(72, 23, 1, 0.06);
  background: var(--step-color);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  gap: var(--space-1);
  text-align: left;
  font-family: inherit;
  transition: transform var(--duration-fast) var(--ease-out);
}

.scale-ramp__step:last-child {
  border-right: none;
}

.scale-ramp__step:hover {
  transform: scale(1.03);
  z-index: 1;
  box-shadow: var(--shadow-md);
}

.scale-ramp__step:active {
  transform: scale(0.98);
}

.scale-ramp__step.is-copied::after {
  content: "Copied";
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.85);
  color: var(--color-blue-7);
}

.scale-ramp__index {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.scale-ramp__hex {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.625rem;
  opacity: 0.9;
  word-break: break-all;
}

.scale-ramp__step--light {
  color: var(--color-brown-8);
}

.scale-ramp__step--dark {
  color: var(--color-brown-1);
}

.scale-ramp__legend {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.scale-ramp__legend-item {
  font-size: 0.625rem;
  text-align: center;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.scale-ramp__legend-item strong {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}

@media (max-width: 960px) {
  .scale-ramp__strip,
  .scale-ramp__legend {
    grid-template-columns: repeat(3, 1fr);
  }

  .scale-ramp__step {
    min-height: 5.5rem;
  }

  .scale-ramp__step:nth-child(3n) {
    border-right: none;
  }
}

@media (max-width: 520px) {
  .scale-ramp__strip,
  .scale-ramp__legend {
    grid-template-columns: repeat(2, 1fr);
  }

  .scale-ramp__step:nth-child(3n) {
    border-right: 1px solid rgba(72, 23, 1, 0.06);
  }

  .scale-ramp__step:nth-child(2n) {
    border-right: none;
  }
}

/* Usage matrix */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: clamp(var(--space-8), 5vw, var(--space-12));
  max-width: 100%;
}

.usage-table {
  width: 100%;
  min-width: min(100%, 32rem);
  border-collapse: collapse;
  font-size: clamp(var(--text-xs), 1.5vw + 0.65rem, var(--text-sm));
}

.usage-table th,
.usage-table td {
  padding: clamp(var(--space-2), 2vw, var(--space-4)) clamp(var(--space-3), 2.5vw, var(--space-5));
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.usage-table th {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.usage-table td:first-child {
  font-weight: 600;
  color: var(--color-text);
}

.usage-table .dot {
  display: inline-block;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  margin-right: var(--space-2);
  vertical-align: middle;
  border: 1px solid rgba(72, 23, 1, 0.1);
}

/* ─── Typography ─────────────────────────────────────────────── */
.type-specimen {
  padding: var(--space-10);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-8);
}

.type-specimen__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-6);
}

.type-specimen__sample--heading {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-4);
}

.type-specimen__sample--heading-italic {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.1;
  color: var(--color-text-secondary);
  margin: 0;
}

.type-specimen__sample--body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: 52ch;
  margin: 0;
}

.type-weights {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.type-weights__row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: var(--space-5);
  align-items: baseline;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

.type-weights__row:last-child {
  border-bottom: none;
}

.type-weights__meta {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.type-weights__sample {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: 1.4;
  color: var(--color-text);
}

.type-weights__sample--light {
  font-weight: 300;
}

.type-weights__sample--regular {
  font-weight: 400;
}

.type-weights__sample--regular-italic {
  font-weight: 400;
  font-style: italic;
}

.type-weights__sample--bold {
  font-weight: 700;
}

.type-weights__sample--bold-italic {
  font-weight: 700;
  font-style: italic;
}

.type-specimen__note {
  margin: var(--space-6) 0 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 52ch;
  line-height: 1.6;
}

.type-scale {
  display: grid;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.type-scale__row {
  display: grid;
  grid-template-columns: 7rem 1fr 5rem;
  align-items: baseline;
  gap: var(--space-6);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.type-scale__row:last-child {
  border-bottom: none;
}

.type-scale__meta {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.type-scale__size {
  font-size: var(--text-xs);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  color: var(--color-text-muted);
  text-align: right;
}

/* ─── Brand assets gallery ─────────────────────────────────────── */
.asset-group__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin: var(--space-16) 0 var(--space-6);
}

.asset-group__title:first-of-type {
  margin-top: 0;
}

.asset-group__lead {
  margin: calc(var(--space-4) * -1) 0 var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 42ch;
  line-height: 1.6;
}

.asset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.asset-card {
  margin: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.asset-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  background: var(--color-bg);
}

.asset-card figcaption {
  padding: var(--space-5);
  display: grid;
  gap: var(--space-1);
}

.asset-card figcaption strong {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
}

.asset-card figcaption span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

@media (max-width: 960px) {
  .asset-grid {
    grid-template-columns: 1fr;
  }
}

/* ─── Components ─────────────────────────────────────────────── */
.component-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: clamp(var(--space-5), 4vw, var(--space-8));
}

.component-panel {
  padding: clamp(var(--space-5), 4vw, var(--space-8));
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  min-width: 0;
}

.component-panel__title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-6);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--color-text);
  color: var(--color-bg);
}

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

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-text-muted);
  background: var(--color-bg);
}

.btn--accent {
  background: var(--color-accent);
  color: var(--color-surface);
}

.btn--accent:hover {
  background: var(--color-accent-hover);
  color: var(--color-surface);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.sample-card {
  padding: var(--card-padding-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.sample-card__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-3);
}

.sample-card__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  line-height: 1.1;
  margin: 0 0 var(--space-3);
}

.sample-card__body {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: rgba(158, 198, 241, 0.35);
  color: var(--color-text);
}

.tag--muted {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

/* Card padding spec (components section) */
.card-padding-spec {
  container-type: inline-size;
  container-name: padding-spec;
  padding: clamp(var(--space-5), 4vw, var(--space-8));
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: clamp(var(--space-6), 4vw, var(--space-8));
  min-width: 0;
}

.card-padding-spec__title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-2);
}

.card-padding-spec__lead {
  margin: 0 0 clamp(var(--space-6), 4vw, var(--space-8));
  font-size: clamp(var(--text-xs), 1.5vw + 0.65rem, var(--text-sm));
  color: var(--color-text-secondary);
  line-height: 1.65;
  max-width: 58ch;
}

.card-padding-spec__lead code {
  word-break: break-word;
}

.card-padding-spec__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  gap: clamp(var(--space-5), 4vw, var(--space-10));
  align-items: start;
}

.card-padding-spec__demo {
  position: relative;
  padding: var(--card-padding-lg);
  background: var(--color-brown-4);
  border-radius: var(--radius-md);
  min-height: clamp(11rem, 38cqi, 16rem);
  min-width: 0;
}

.card-padding-spec__demo::before {
  content: "";
  position: absolute;
  inset: var(--card-padding-lg);
  border: 1px dashed rgba(74, 127, 168, 0.55);
  border-radius: calc(var(--radius-md) - 4px);
  pointer-events: none;
}

.card-padding-spec__photo {
  width: 100%;
  height: clamp(4.5rem, 28cqi, 6.5rem);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, var(--color-blue-5), var(--color-brown-3));
  margin-bottom: var(--card-gap);
}

.card-padding-spec__display {
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 5cqi + 0.5rem, var(--text-2xl));
  line-height: 1.05;
  margin: 0;
  color: var(--color-brown-9);
}

.card-padding-spec__callouts {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.card-padding-spec__callout {
  position: absolute;
  font-size: clamp(0.5rem, 2cqi + 0.35rem, 0.625rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  white-space: nowrap;
}

.card-padding-spec__callout--top {
  top: calc(var(--card-padding-lg) * 0.35);
  left: 50%;
  transform: translateX(-50%);
}

.card-padding-spec__callout--left {
  left: calc(var(--card-padding-lg) * 0.2);
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  transform-origin: center;
}

.card-padding-spec__callout--bottom {
  bottom: calc(var(--card-padding-lg) * 0.35);
  left: calc(var(--card-padding-lg) + var(--card-gap));
  max-width: calc(100% - var(--card-padding-lg) * 2);
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-padding-spec__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  min-width: 0;
}

.card-padding-spec__table {
  width: 100%;
  min-width: min(100%, 18rem);
  border-collapse: collapse;
  font-size: clamp(var(--text-xs), 1.5vw + 0.65rem, var(--text-sm));
}

.card-padding-spec__table th,
.card-padding-spec__table td {
  padding: clamp(var(--space-2), 2vw, var(--space-3)) clamp(var(--space-2), 2vw, var(--space-4));
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.card-padding-spec__table th {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.card-padding-spec__table code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.85em;
  word-break: break-word;
}

@container padding-spec (max-width: 22rem) {
  .card-padding-spec__callout--left {
    display: none;
  }
}

@container padding-spec (max-width: 28rem) {
  .card-padding-spec__callout--bottom {
    left: var(--card-padding-lg);
    white-space: normal;
    max-width: 8rem;
    line-height: 1.2;
  }
}

@supports not (container-type: inline-size) {
  @media (max-width: 520px) {
    .card-padding-spec__callout--left {
      display: none;
    }
  }
}

/* ─── Voice & principles ───────────────────────────────────────── */
.principle-list {
  display: grid;
  gap: var(--space-6);
  max-width: var(--content-width);
}

.principle-item {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: var(--space-5);
  align-items: start;
}

.principle-item__num {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  color: var(--color-accent-on-light);
  line-height: 1;
}

.principle-item__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  margin: 0 0 var(--space-2);
}

.principle-item__body {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.65;
}

/* ─── Do / Don't ─────────────────────────────────────────────── */
.dodont-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: clamp(var(--space-4), 3vw, var(--space-6));
}

.dodont {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  min-width: 0;
}

.dodont__header {
  padding: clamp(var(--space-3), 2.5vw, var(--space-4)) clamp(var(--space-4), 3vw, var(--space-6));
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dodont--do .dodont__header {
  background: rgba(158, 198, 241, 0.25);
  color: var(--color-accent);
}

.dodont--dont .dodont__header {
  background: rgba(72, 23, 1, 0.08);
  color: var(--color-text);
}

.dodont__body {
  padding: clamp(var(--space-4), 3.5vw, var(--space-6));
  background: var(--color-surface);
}

.dodont__body ul {
  margin: 0;
  padding-left: clamp(var(--space-4), 3vw, var(--space-5));
  color: var(--color-text-secondary);
  font-size: clamp(var(--text-xs), 1.5vw + 0.65rem, var(--text-sm));
  line-height: 1.7;
}

.dodont__body code {
  word-break: break-word;
}

.dodont__body li + li {
  margin-top: var(--space-2);
}

/* ─── Dark section demo ────────────────────────────────────────── */
.dark-band {
  margin-top: var(--space-12);
  padding: var(--space-12);
  background: var(--color-dark);
  border-radius: var(--radius-lg);
  color: var(--color-bg);
}

.dark-band__title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  margin: 0 0 var(--space-4);
}

.dark-band__body {
  color: rgba(248, 243, 239, 0.75);
  max-width: 42ch;
  margin: 0 0 var(--space-6);
  line-height: 1.65;
}

.dark-band a {
  color: var(--color-accent-on-dark);
}

/* Light-surface accent rule (colors section) */
.surface-contrast-rule {
  container-type: inline-size;
  container-name: surface-rule;
  margin-top: clamp(var(--space-8), 5vw, var(--space-10));
  padding: clamp(var(--space-5), 4vw, var(--space-8));
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  min-width: 0;
}

.surface-contrast-rule__title {
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 2.5vw + 0.75rem, var(--text-xl));
  margin: 0 0 var(--space-3);
  color: var(--color-text);
}

.surface-contrast-rule__body {
  margin: 0 0 clamp(var(--space-4), 3vw, var(--space-6));
  font-size: clamp(var(--text-xs), 1.5vw + 0.65rem, var(--text-sm));
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: 58ch;
}

.surface-contrast-rule__body code {
  word-break: break-word;
}

.surface-contrast-rule__swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: clamp(var(--space-3), 2.5vw, var(--space-4));
}

.surface-contrast-chip {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-2), 2vw, var(--space-3));
  padding: clamp(var(--space-2), 2vw, var(--space-3)) clamp(var(--space-3), 2.5vw, var(--space-4));
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  font-size: clamp(var(--text-xs), 1.5vw + 0.6rem, var(--text-sm));
  min-width: 0;
}

.surface-contrast-chip--do {
  background: var(--color-bg);
  color: var(--color-accent-on-light);
  font-weight: 600;
}

.surface-contrast-chip--dont {
  background: var(--color-bg);
  color: var(--color-accent-soft);
  font-weight: 600;
  opacity: 0.85;
}

.surface-contrast-chip__dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ─── Footer ─────────────────────────────────────────────────── */
.footer {
  padding: var(--space-16) var(--space-10) var(--space-8);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: var(--space-12);
  align-items: start;
}

.footer__brand {
  display: grid;
  gap: var(--space-3);
}

.footer__wordmark {
  font-size: var(--text-3xl);
  line-height: 1;
  margin: 0;
}

.footer__tagline {
  margin: 0;
  font-style: italic;
  font-family: var(--font-heading);
  color: var(--color-text-muted);
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-8);
}

.footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.footer__col a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.footer__col a:hover {
  color: var(--color-text);
}

.footer__col li span {
  color: var(--color-text-muted);
}

.footer__heading {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.footer__meta {
  max-width: var(--max-width);
  margin: var(--space-12) auto 0;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.footer__meta a {
  color: var(--color-text);
  text-decoration: none;
}

.footer__meta a:hover {
  color: var(--color-accent);
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 960px) {
  .sidebar {
    position: static;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-5) var(--space-6);
  }

  .sidebar__brand {
    margin-bottom: var(--space-4);
  }

  .sidebar__nav {
    grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  }

  .main {
    margin-left: 0;
  }

  .hero {
    min-height: auto;
    padding: var(--space-12) var(--space-6);
  }

  .type-scale__row {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .type-scale__size {
    text-align: left;
  }

  .type-weights__row {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__cols {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .footer__meta {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ─── A11y: skip link & focus rings ─────────────────────────── */
.skip-link {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-3) var(--space-5);
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--duration-base) var(--ease-out);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--color-accent-soft);
  outline-offset: 2px;
}

:where(a, button, [role="button"], [tabindex]):focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ─── Reading progress bar ──────────────────────────────────── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  z-index: 30;
  pointer-events: none;
}

.reading-progress span {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent-soft), var(--color-accent));
  transition: width 80ms linear;
}

/* ─── Scroll anchor offset (under sticky bar) ───────────────── */
:where(.section, .hero) {
  scroll-margin-top: var(--space-6);
}

/* ─── Sidebar polish ────────────────────────────────────────── */
.sidebar__brand {
  display: block;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.sidebar__brand:hover {
  color: var(--color-accent);
}

.sidebar__footer {
  margin: var(--space-8) 0 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ─── Hero actions ─────────────────────────────────────────── */
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: 0 0 var(--space-10);
}

/* ─── Wordmark lockup ──────────────────────────────────────── */
.lockup {
  margin-top: var(--space-12);
  padding: var(--space-10);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.lockup__label {
  margin: 0 0 var(--space-8);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.lockup__demo {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--space-10);
  align-items: center;
}

.lockup__mark {
  position: relative;
  padding: clamp(3rem, 6vw, 5rem);
  background: var(--color-bg);
  border: 1px dashed rgba(72, 23, 1, 0.18);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 12rem;
}

.lockup__wordmark {
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  line-height: 1;
  margin: 0;
}

.lockup__guide {
  position: absolute;
  background: rgba(74, 127, 168, 0.35);
  pointer-events: none;
}

.lockup__guide--top,
.lockup__guide--bottom {
  left: clamp(1.5rem, 3vw, 2.5rem);
  right: clamp(1.5rem, 3vw, 2.5rem);
  height: 1px;
}

.lockup__guide--top { top: clamp(1.5rem, 3vw, 2.5rem); }
.lockup__guide--bottom { bottom: clamp(1.5rem, 3vw, 2.5rem); }

.lockup__guide--left,
.lockup__guide--right {
  top: clamp(1.5rem, 3vw, 2.5rem);
  bottom: clamp(1.5rem, 3vw, 2.5rem);
  width: 1px;
}

.lockup__guide--left { left: clamp(1.5rem, 3vw, 2.5rem); }
.lockup__guide--right { right: clamp(1.5rem, 3vw, 2.5rem); }

.lockup__cap {
  position: absolute;
  top: var(--space-3);
  left: var(--space-4);
  font-family: var(--font-heading);
  font-style: italic;
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.lockup__rules {
  margin: 0;
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-3);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.65;
}

.lockup__rules strong {
  color: var(--color-text);
  font-weight: 600;
  margin-right: var(--space-1);
}

.lockup__rules code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.85em;
  padding: 0.05em 0.35em;
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-text);
}

@media (max-width: 760px) {
  .lockup__demo {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ─── Print stylesheet (for PDF export) ─────────────────────── */
@media print {
  .sidebar,
  .reading-progress,
  .skip-link,
  .hero__actions,
  .color-card__copy,
  .scale-ramp__step.is-copied::after,
  #ui-previews {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .main {
    margin-left: 0;
  }

  .section,
  .hero {
    padding: 2rem 1.5rem;
    page-break-inside: avoid;
    border-bottom: 1px solid #ddd;
  }

  .hero {
    min-height: auto;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }

  .footer {
    background: transparent;
    border-top: 1px solid #ddd;
  }
}