/* Hallmark · genre: modern-minimal · macrostructure: Workbench · theme: Cobalt · enrichment: none · nav: N5 · footer: Ft2 */
/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V5 */

:root {
  /* Paper — cool engineered near-white */
  --color-paper: oklch(98.5% 0.002 240);
  --color-paper-2: oklch(96% 0.003 240);
  --color-paper-3: oklch(92% 0.004 240);

  /* Ink */
  --color-ink: oklch(18% 0.01 260);
  --color-ink-muted: oklch(42% 0.01 260);
  --color-ink-faint: oklch(65% 0.008 260);

  /* Accent — electric cobalt */
  --color-accent: oklch(55% 0.22 265);
  --color-accent-hover: oklch(50% 0.24 265);
  --color-accent-soft: oklch(92% 0.04 265);

  /* Surfaces */
  --color-surface: oklch(100% 0 0);
  --color-surface-raised: oklch(100% 0 0);
  --color-border: oklch(88% 0.005 250);
  --color-border-hairline: oklch(91% 0.003 250);

  /* Code */
  --color-code-bg: oklch(22% 0.015 260);
  --color-code-fg: oklch(92% 0.005 240);
  --color-code-accent: oklch(72% 0.18 265);
  --color-code-string: oklch(68% 0.14 160);
  --color-code-keyword: oklch(70% 0.16 300);
  --color-code-comment: oklch(55% 0.01 260);

  /* Typography */
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;

  /* Spacing — 4pt scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.04);
  --shadow-md: 0 4px 12px oklch(0% 0 0 / 0.06);
  --shadow-lg: 0 8px 32px oklch(0% 0 0 / 0.08);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: clip;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-paper);
}

/* Nav — N1b full-width fixed top bar */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-xl);
  background: oklch(100% 0 0 / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-hairline);
}

.nav-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav-links a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-links a:hover {
  color: var(--color-ink);
}

.nav-links a.active {
  color: var(--color-accent);
}

.nav-cta {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-out);
}

.nav-cta:hover {
  background: var(--color-accent-hover);
}

/* Hero */
.hero {
  padding: var(--space-4xl) var(--space-xl) var(--space-3xl);
  max-width: 800px;
  margin: 0 auto;
  text-align: left;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.02em;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw + 0.5rem, 3.75rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.hero h1 em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-lede {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--color-ink-muted);
  max-width: 600px;
  margin: 0 0 var(--space-xl);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.btn-primary {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: var(--space-sm) var(--space-xl);
  background: var(--color-ink);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.btn-primary:hover {
  background: oklch(12% 0.01 260);
}

.btn-secondary {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: var(--space-sm) var(--space-xl);
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: border-color var(--duration-fast) var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.btn-secondary:hover {
  border-color: var(--color-ink-muted);
}

/* Workbench sections */
.workbench {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-xl) var(--space-4xl);
}

.workbench-section {
  margin-bottom: var(--space-3xl);
}

.workbench-section:last-child {
  margin-bottom: 0;
}

.workbench-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}

.workbench-section h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
}

.workbench-section p {
  font-size: 0.9375rem;
  color: var(--color-ink-muted);
  line-height: 1.65;
  margin-bottom: var(--space-md);
  max-width: 600px;
}

/* Code block — the "screenshot" */
.code-frame {
  background: var(--color-code-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid oklch(28% 0.01 260);
}

.code-frame-header {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: oklch(18% 0.01 260);
  border-bottom: 1px solid oklch(28% 0.01 260);
}

.code-frame-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-frame-dot:nth-child(1) { background: oklch(65% 0.18 20); }
.code-frame-dot:nth-child(2) { background: oklch(70% 0.16 100); }
.code-frame-dot:nth-child(3) { background: oklch(60% 0.16 160); }

.code-frame-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-code-comment);
  margin-left: var(--space-sm);
}

.code-frame-body {
  padding: var(--space-md);
  overflow-x: auto;
}

.code-frame-body pre {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-code-fg);
  white-space: pre;
  tab-size: 2;
}

.code-frame-body .kw { color: var(--color-code-keyword); }
.code-frame-body .str { color: var(--color-code-string); }
.code-frame-body .fn { color: var(--color-code-accent); }
.code-frame-body .cm { color: var(--color-code-comment); }

/* Response block */
.response-block {
  margin-top: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.response-block-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-sm);
}

.response-block pre {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--color-ink);
  white-space: pre-wrap;
  word-break: break-word;
}

/* SDK section */
.sdk-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

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

.sdk-card h3 {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin-bottom: var(--space-xs);
}

.sdk-card p {
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
  margin-bottom: 0;
}

/* Page grid — home page cards */
.page-grid {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-xl) var(--space-3xl);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.page-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);
}

.page-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.page-card-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-card h2 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.page-card p {
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
  line-height: 1.55;
  flex: 1;
}

.page-card-arrow {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent);
  align-self: flex-end;
}

/* Page hero — sub-page header */
.page-hero {
  padding: var(--space-3xl) var(--space-xl) var(--space-2xl);
  max-width: 800px;
  margin: 0 auto;
  text-align: left;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw + 0.5rem, 2.75rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}

/* Page nav — prev/next */
.page-nav {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-xl) var(--space-3xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* HTTP method badges */
.method-get {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: oklch(55% 0.16 160);
  background: oklch(94% 0.06 160);
  padding: 2px var(--space-xs);
  border-radius: var(--radius-sm);
  margin-right: var(--space-xs);
}

.method-post {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: oklch(55% 0.22 265);
  background: var(--color-accent-soft);
  padding: 2px var(--space-xs);
  border-radius: var(--radius-sm);
  margin-right: var(--space-xs);
}

/* Sub-headings in workbench */
.workbench-section h3 {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}
.cta-strip {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  border-top: 1px solid var(--color-border-hairline);
}

.cta-strip h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--space-md);
}

.cta-strip p {
  font-size: 0.9375rem;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-lg);
}

/* Footer — Ft2 Inline single line */
.footer {
  text-align: center;
  padding: var(--space-xl);
  border-top: 1px solid var(--color-border-hairline);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-ink);
}

.footer-tagline {
  font-size: 0.8125rem;
  color: var(--color-ink-faint);
}

.footer-credit {
  font-size: 0.75rem;
  color: var(--color-ink-faint);
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    padding: var(--space-xs) var(--space-md);
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding: var(--space-3xl) var(--space-md) var(--space-2xl);
  }

  .hero h1 {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }

  .workbench {
    padding: 0 var(--space-md) var(--space-3xl);
  }

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

  .code-frame-body {
    padding: var(--space-sm);
  }

  .code-frame-body pre {
    font-size: 0.6875rem;
  }
}

@media (max-width: 414px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .nav {
    padding: var(--space-xs) var(--space-md);
  }
}

@media (max-width: 320px) {
  .hero h1 {
    font-size: 1.5rem;
  }

  .workbench-section h2 {
    font-size: 1.25rem;
  }
}