/* Marrow — landing page
 * Colors mirror composeApp/.../ui/theme/Color.kt
 * Fonts: DM Sans (display) + Literata (body)
 */

:root {
  /* Light theme — from Color.kt */
  --bg: #FFFBF8;
  --surface: #FAFAF8;
  --surface-variant: #F0E6DB;
  --on-bg: #1F1B16;
  --on-surface-variant: #504539;
  --primary: #6B5638;          /* Umber */
  --primary-hover: #5A4729;
  --on-primary: #FFFFFF;
  --primary-container: #EDE0D4;
  --on-primary-container: #2C1E0F;
  --secondary: #6F5D4B;
  --tertiary: #5A6340;
  --outline: #827568;
  --outline-variant: #D4C5B5;

  /* Brand accents */
  --umber: #6B5638;
  --warm-brown: #8B6F47;
  --dusty-rose: #A0826D;

  /* Type & layout */
  --font-display: 'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: 'Literata', Georgia, 'Times New Roman', serif;
  --radius-pill: 9999px;
  --radius-card: 14px;
  --radius-sm: 10px;
  --max-w: 1100px;
  --pad-x: clamp(1.25rem, 4vw, 2.5rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1A1816;
    --surface: #23201D;
    --surface-variant: #2D2A26;
    --on-bg: #F5F0EB;
    --on-surface-variant: #D4C5B5;
    --primary: #D4B896;          /* DarkPrimary */
    --primary-hover: #E5CAA8;
    --on-primary: #3D2A14;
    --primary-container: #4A3828;
    --on-primary-container: #EDE0D4;
    --secondary: #DBC4AB;
    --tertiary: #CBBFA0;
    --outline: #9D8E80;
    --outline-variant: #504539;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--on-bg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
  line-height: 1.15;
}

p { margin: 0 0 1em; }

a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease, color 160ms ease;
}
a:hover { border-bottom-color: currentColor; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* Hero */
.hero {
  padding: clamp(4rem, 10vw, 7rem) 0 clamp(3rem, 7vw, 5rem);
  text-align: center;
}

.hero-logo {
  width: clamp(96px, 18vw, 144px);
  height: clamp(96px, 18vw, 144px);
  margin: 0 auto 2rem;
  display: block;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 0.75rem;
}

.hero .tagline {
  font-size: clamp(1.125rem, 2.2vw, 1.375rem);
  color: var(--on-surface-variant);
  max-width: 36ch;
  margin: 0 auto 2.5rem;
}

.cta-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.875rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.95rem 1.75rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: 1px solid transparent;
  background: var(--primary);
  color: var(--on-primary);
  transition: background-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
  text-decoration: none;
}
.btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px -8px rgba(107, 86, 56, 0.5);
  border-bottom: 1px solid transparent;
}
.btn:active { transform: translateY(0); }

.btn-ghost {
  background: transparent;
  color: var(--on-bg);
  border: 1px solid var(--outline-variant);
  font-size: 0.95rem;
}
.btn-ghost:hover {
  background: var(--surface);
  color: var(--on-bg);
  box-shadow: none;
}

.platform-note {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  margin-top: 0.25rem;
}

/* Section scaffolding */
.section {
  padding: clamp(3rem, 7vw, 5rem) 0;
}

.section-eyebrow {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.75rem;
}

.section h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 2.5rem;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-card);
  padding: 1.75rem 1.5rem;
  transition: transform 200ms ease, border-color 200ms ease;
}
.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.feature-icon {
  width: 36px;
  height: 36px;
  margin-bottom: 1rem;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--on-surface-variant);
  margin: 0;
}

/* Screenshots */
.shots {
  background: var(--surface-variant);
  border-radius: var(--radius-card);
  padding: clamp(2rem, 5vw, 3.5rem);
  text-align: center;
  border: 1px dashed var(--outline-variant);
}

.shots p {
  color: var(--on-surface-variant);
  margin: 0;
  font-style: italic;
}

/* Footer */
.footer {
  border-top: 1px solid var(--outline-variant);
  padding: 2.5rem 0 3rem;
  margin-top: 4rem;
  font-size: 0.875rem;
  color: var(--on-surface-variant);
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer a { color: var(--on-surface-variant); }
.footer a:hover { color: var(--primary); }

/* Logo animation — staggered pulse */
@media (prefers-reduced-motion: no-preference) {
  .ring-outer { animation: pulse 4s ease-in-out infinite; }
  .ring-mid   { animation: pulse 4s ease-in-out infinite 0.4s; }
  .ring-inner { animation: pulse 4s ease-in-out infinite 0.8s; }
}

@keyframes pulse {
  0%, 100% { transform-origin: center; transform: scale(1); }
  50%      { transform-origin: center; transform: scale(1.04); }
}

/* Site header (shared by prose pages) */
.site-header {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--outline-variant);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-header a.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--on-bg);
  font-size: 1.05rem;
}
.site-header a.brand:hover { border-bottom-color: transparent; color: var(--primary); }

.brand-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

/* Prose / legal pages */
.prose {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4rem) var(--pad-x) clamp(3rem, 7vw, 5rem);
}

.prose h1 {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  margin-bottom: 0.25rem;
}

.prose .updated {
  color: var(--on-surface-variant);
  font-size: 0.9rem;
  font-family: var(--font-display);
  margin-bottom: 2rem;
}

.prose h2 {
  font-size: 1.375rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.prose h3 {
  font-size: 1.05rem;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

.prose p, .prose li { font-size: 1rem; line-height: 1.7; }

.prose ul, .prose ol { padding-left: 1.25rem; }
.prose li { margin-bottom: 0.4rem; }

.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: var(--surface-variant);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.95rem;
}
.prose th, .prose td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--outline-variant);
  text-align: left;
  vertical-align: top;
}
.prose th {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--on-surface-variant);
}

.draft-banner {
  background: var(--primary-container);
  color: var(--on-primary-container);
  border-radius: var(--radius-card);
  padding: 0.875rem 1.125rem;
  margin: 0 0 2rem;
  font-size: 0.925rem;
  border: 1px solid var(--outline-variant);
}

.draft-banner strong {
  font-family: var(--font-display);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.75rem;
  display: block;
  margin-bottom: 0.25rem;
  color: var(--primary);
}

/* Mobile */
@media (max-width: 600px) {
  body { font-size: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-row { flex-direction: column; align-items: flex-start; }
}