/* ══════════════════════════════════════════════════════════════════
   Jidoka — Brand Layer
   Tokens, fonts, brand-specific surfaces, and scroll-section styles.
   Loaded after the shared base/layout/components stylesheets.

   Metaphor: instruction layers — a stepped stack, most general at the
   base, most specific at the top. Cool indigo signal (blueprint ink).
   ══════════════════════════════════════════════════════════════════ */

@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap");

/* ── Design Tokens ─────────────────────────────────────────────── */

:root {
  /* Surfaces — cool paper */
  --bg-page: #ffffff;
  --bg-warm: #f4f5fb;
  --bg-elevated: #eef0f8;
  --bg-hover: #e2e5f3;
  --bg-inverted: #13141b;

  /* Indigo (cool signal — blueprint ink) */
  --ink-50: #eef1fc;
  --ink-100: #dde3f8;
  --ink-200: #b6c2ef;
  --ink-400: #5161d6;
  --ink-600: #343ca0;

  /* Family alias — shared layout.css reads --accent-warm-* */
  --accent-warm-50: var(--ink-50);
  --accent-warm-100: var(--ink-100);
  --accent-warm-200: var(--ink-200);
  --accent-warm-400: var(--ink-400);
  --accent-warm-600: var(--ink-600);

  /* Text */
  --text-primary: #06070c;
  --text-heading: #13141b;
  --text-body: #585a66;
  --text-secondary: #6e7080;
  --text-tertiary: #a6a8b8;
  --text-on-dark: #e7e8ef;

  /* Grays — cool-leaning */
  --gray-50: #f1f2f8;
  --gray-100: #e2e5f0;
  --gray-200: #cbcedd;
  --gray-300: #a6a8b8;
  --gray-400: #6e7080;
  --gray-500: #585a66;
  --gray-700: #33343f;
  --gray-900: #13141b;
  --black: #06070c;

  /* Borders */
  --border-default: #e2e5f0;
  --border-strong: #cbcedd;

  /* Radii — crisp, architectural */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* Typography */
  --font-display:
    "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-sans:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono:
    "IBM Plex Mono", "SF Mono", Consolas, "Liberation Mono", monospace;

  --text-hero-size: 4.5rem;
  --text-hero-weight: 700;
  --text-display-size: 2.75rem;
  --text-h1-size: 2rem;
  --text-h2-size: 1.5rem;
  --text-h3-size: 1.25rem;
  --text-body-size: 1rem;
  --text-small-size: 0.875rem;
  --text-badge-size: 0.75rem;

  /* Transitions */
  --ease-default: cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration-fast: 150ms;
  --duration-normal: 200ms;
  --duration-slow: 400ms;
}

/* ── Layout: Home ──────────────────────────────────────────────── */

.layout-home .page-content {
  max-width: none;
  padding: 0;
}

.layout-home .page-title {
  display: none;
}

.layout-home .page-content > .jidoka-section {
  padding: var(--space-24) var(--space-6);
}

/* ── Header ────────────────────────────────────────────────────── */

.site-header {
  background: transparent;
  border-bottom: none;
  transition:
    background var(--duration-normal) var(--ease-default),
    border-color var(--duration-normal) var(--ease-default);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border-default);
}

.brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-github {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  opacity: 0.5;
  transition: opacity var(--duration-fast) var(--ease-default);
}

.nav-github:hover {
  opacity: 1;
}

.nav-spacer {
  flex: 1;
}

/* ── Hero ──────────────────────────────────────────────────────── */

.jidoka-hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 56px !important;
  padding-bottom: var(--space-16) !important;
  position: relative;
}

.jidoka-hero .layer-stack-hero {
  width: 72px;
  height: 72px;
  margin-bottom: var(--space-8);
  animation: fadeUp 600ms var(--ease-default) 100ms backwards;
}

.jidoka-hero .hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-hero-size);
  line-height: 1.05;
  color: var(--black);
  letter-spacing: -0.02em;
  max-width: 880px;
  margin: 0 auto var(--space-6);
  animation: fadeUp 600ms var(--ease-default) 200ms backwards;
}

.jidoka-hero .hero-subtitle {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--gray-400);
  max-width: 560px;
  margin: 0 auto;
  animation: fadeUp 600ms var(--ease-default) 300ms backwards;
}

.scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  animation: fadeUp 600ms var(--ease-default) 500ms backwards;
}

.scroll-hint span {
  font-family: var(--font-mono);
  font-size: var(--text-badge-size);
  color: var(--gray-300);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 32px;
  background: var(--gray-200);
  animation: scrollPulse 2s var(--ease-default) infinite;
}

@keyframes scrollPulse {
  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(0.6);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Sections ──────────────────────────────────────────────────── */

.jidoka-section-cool {
  background: var(--bg-warm);
}

.section-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-small-size);
  font-weight: 500;
  color: var(--ink-400);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-display-size);
  line-height: 1.1;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  max-width: 660px;
  margin-bottom: var(--space-6);
}

.section-body {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--gray-400);
  max-width: 580px;
  margin-bottom: var(--space-12);
}

.section-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--ink-600);
  background: var(--ink-50);
  padding: 1px 5px;
  border-radius: var(--radius-sm);
}

/* ── Stats ─────────────────────────────────────────────────────── */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.stat-card {
  background: var(--bg-page);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
}

.stat-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 3.5rem;
  line-height: 1;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-family: var(--font-sans);
  font-size: var(--text-small-size);
  font-weight: 500;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-detail {
  font-family: var(--font-sans);
  font-size: var(--text-small-size);
  color: var(--gray-300);
  margin-top: var(--space-2);
}

/* ── The Layers ────────────────────────────────────────────────── */

.layers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.layer-card {
  padding: var(--space-6);
  border-top: 3px solid var(--gray-200);
  transition: border-color var(--duration-normal) var(--ease-default);
}

.layer-card:hover {
  border-top-color: var(--ink-400);
}

.layer-card .layer-tag {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-small-size);
  color: var(--ink-400);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.layer-card .layer-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-body-size);
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.layer-card .layer-desc {
  font-size: var(--text-small-size);
  color: var(--gray-400);
  line-height: 1.55;
}

/* ── Duo cards (foundations, gates) ────────────────────────────── */

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

.foundation-card,
.gate-card {
  background: var(--bg-page);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition:
    border-color var(--duration-normal) var(--ease-default),
    transform var(--duration-normal) var(--ease-default);
}

.foundation-card:hover,
.gate-card:hover {
  border-color: var(--ink-200);
  transform: translateY(-2px);
}

.foundation-source,
.gate-kind {
  font-family: var(--font-mono);
  font-size: var(--text-badge-size);
  color: var(--ink-400);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.foundation-name,
.gate-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-h3-size);
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.foundation-desc,
.gate-desc {
  font-size: var(--text-body-size);
  color: var(--gray-400);
  line-height: 1.6;
}

.gate-find {
  display: inline-block;
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-600);
  background: var(--ink-50);
  border: 1px solid var(--ink-100);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
}

/* ── Getting Started ───────────────────────────────────────────── */

.getting-started-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-display-size);
  line-height: 1.1;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: var(--space-2);
}

.getting-started-sub {
  font-size: 1.125rem;
  color: var(--gray-400);
  text-align: center;
  margin-bottom: var(--space-12);
}

.terminal {
  background: var(--bg-inverted);
  border-radius: var(--radius-lg);
  padding: 0;
  max-width: 680px;
  margin: 0 auto;
  overflow: hidden;
  box-shadow:
    0 24px 80px rgba(6, 7, 12, 0.15),
    0 8px 24px rgba(6, 7, 12, 0.1);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.terminal-title {
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-badge-size);
  color: var(--gray-400);
}

.terminal-lines {
  padding: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-small-size);
  line-height: 2;
}

.terminal-line {
  opacity: 0;
  transform: translateY(4px);
  transition:
    opacity 300ms var(--ease-default),
    transform 300ms var(--ease-default);
  white-space: nowrap;
  overflow-x: auto;
}

.terminal-lines.typing .terminal-line:nth-child(1) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0ms;
}

.terminal-lines.typing .terminal-line:nth-child(2) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 400ms;
}

.terminal-lines.typing .terminal-line:nth-child(3) {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 800ms;
}

.terminal-prompt {
  color: var(--ink-400);
  user-select: none;
}

.terminal-cmd {
  color: var(--text-on-dark);
}

.terminal-string {
  color: var(--ink-200);
}

.closing-note {
  text-align: center;
  font-size: var(--text-small-size);
  color: var(--gray-400);
  max-width: 540px;
  margin: var(--space-12) auto 0;
}

.closing-note code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-600);
  background: var(--ink-50);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* ── Stagger Reveal ────────────────────────────────────────────── */

.stagger-item {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 400ms var(--ease-default),
    transform 400ms var(--ease-default);
}

.stagger-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Layer-stack SVG ───────────────────────────────────────────── */

.layer-stack-hero .layer-bar,
.layer-divider .layer-bar {
  stroke: var(--gray-300);
  stroke-width: 1.5;
  fill: none;
}

.layer-stack-hero .layer-bar-top,
.layer-divider .layer-bar-top {
  stroke: var(--ink-400);
  fill: var(--ink-50);
}

/* ── Footer Brand ──────────────────────────────────────────────── */

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-on-dark);
}

.footer-tagline {
  font-family: var(--font-sans);
  font-size: var(--text-small-size);
  color: var(--gray-400);
}

.site-footer {
  margin-top: 0;
}

/* ── Divider ───────────────────────────────────────────────────── */

.layer-divider {
  display: flex;
  justify-content: center;
  padding: var(--space-16) 0;
}

.layer-divider svg {
  width: 20px;
  height: 20px;
}

/* ── Responsive ────────────────────────────────────────────────── */

@media (max-width: 768px) {
  :root {
    --text-hero-size: 2.75rem;
    --text-display-size: 2rem;
    --text-h1-size: 1.75rem;
    --text-h2-size: 1.375rem;
    --space-24: 64px;
    --space-16: 48px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .layers-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .duo-grid {
    grid-template-columns: 1fr;
  }

  .stat-number {
    font-size: 2.5rem;
  }

  .terminal {
    margin: 0 calc(-1 * var(--space-4));
    border-radius: var(--radius-md);
  }
}

@media (max-width: 480px) {
  .layers-grid {
    grid-template-columns: 1fr;
  }
}