/* Motum — shared site styles.
 *
 * Palette mirrors the iOS onboarding screens (Shared/Theme):
 *   sunrise   — primary brand gradient (motumOrange → motumPink → motumPurple)
 *   ocean     — secondary accent (motumTeal → motumBlue → motumIndigo)
 *   night     — dark-mode background (motumDarkNavy → motumIndigo)
 *
 * Light mode is the default; dark mode auto-activates from the OS via
 * prefers-color-scheme. Every page links to this stylesheet to stay in
 * sync — no per-page CSS duplication.
 */

:root {
  /* Brand stops — match Shared/Theme/ColorPalette.swift to 4-decimal precision */
  --motum-orange:   #FF7326;   /* rgb(255, 115, 38)   */
  --motum-pink:     #F24D80;   /* rgb(242, 77, 128)   */
  --motum-purple:   #8C40D9;   /* rgb(140, 64, 217)   */
  --motum-indigo:   #4D33B3;   /* rgb(77, 51, 179)    */
  --motum-blue:     #3380F2;   /* rgb(51, 128, 242)   */
  --motum-teal:     #1ABFB3;   /* rgb(26, 191, 179)   */
  --motum-darknavy: #141426;   /* rgb(20, 20, 38)     */

  /* Gradients */
  --gradient-sunrise: linear-gradient(135deg, var(--motum-orange) 0%, var(--motum-pink) 50%, var(--motum-purple) 100%);
  --gradient-ocean:   linear-gradient(135deg, var(--motum-teal)   0%, var(--motum-blue) 50%, var(--motum-indigo) 100%);
  --gradient-night:   linear-gradient(180deg, var(--motum-darknavy) 0%, #2a1f5a 60%, var(--motum-indigo) 100%);
  --strip-sunrise:    linear-gradient(90deg,  var(--motum-orange), var(--motum-pink), var(--motum-purple));

  /* Light-mode surfaces & text */
  --bg:             #ffffff;
  --bg-elevated:    #f5f5f7;
  --text:           #141426;
  --text-secondary: #6e6e73;
  --border:         #d2d2d7;

  /* Link colour — darkened pink (WCAG AA on white, ~4.6:1) */
  --link:       #C73564;
  --link-hover: #A82A50;

  /* Layout tokens */
  --max-width: 720px;
  --max-width-wide: 960px;
  --radius:    16px;
  --radius-sm: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:             var(--motum-darknavy);
    --bg-elevated:    #1f1f33;
    --text:           #f5f5f7;
    --text-secondary: rgba(255, 255, 255, 0.62);
    --border:         rgba(255, 255, 255, 0.10);

    /* Lighter sunrise-orange so it pops against #141426 */
    --link:       #FF9F66;
    --link-hover: #FFB888;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

/* 3px brand strip rendered at the very top of every page */
.brand-strip {
  height: 3px;
  background: var(--strip-sunrise);
}

/* Sticky translucent header */
header.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

@media (prefers-color-scheme: dark) {
  header.site-header { background: rgba(20, 20, 38, 0.82); }
}

.nav {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-weight: 600;
  font-size: 17px;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand:hover { text-decoration: none; color: var(--text); }

.nav-links {
  display: flex;
  gap: 22px;
  font-size: 14px;
}

.nav-links a { color: var(--text-secondary); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 72px 24px 96px;
}

main.wide { max-width: var(--max-width-wide); }

/* Typography */
h1 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 16px;
  color: var(--text);
}

h2 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 56px 0 16px;
  color: var(--text);
}

h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 8px;
  color: var(--text);
}

p { margin: 0 0 16px; }

ul { margin: 0 0 16px; padding-left: 24px; }
li { margin-bottom: 8px; }

.lede {
  font-size: 21px;
  color: var(--text-secondary);
  font-weight: 400;
  margin: 0 0 24px;
  max-width: 560px;
}

.updated {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 0 0 48px;
}

/* Surface cards */
.card {
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin: 32px 0;
}

.callout {
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin: 32px 0;
}

.callout p:last-child { margin-bottom: 0; }

/* Feature grid (used on landing + about) */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 32px 0;
}

.feature {
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 24px;
}

.feature h3 { font-size: 17px; font-weight: 600; margin: 0 0 8px; }
.feature p  { font-size: 15px; color: var(--text-secondary); margin: 0; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--gradient-sunrise);
  color: #ffffff;
}
.btn-primary:hover { color: #ffffff; opacity: 0.95; }

.btn-ghost {
  background: transparent;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.30);
}
.btn-ghost:hover { color: #ffffff; background: rgba(255, 255, 255, 0.08); }

/* Hero — used on landing page only */
.hero {
  background:
    radial-gradient(ellipse 900px 500px at 18% 22%, rgba(255, 115, 38, 0.22), transparent 60%),
    radial-gradient(ellipse 800px 600px at 85% 70%, rgba(242, 77, 128, 0.20), transparent 60%),
    var(--gradient-night);
  color: #ffffff;
  padding: 96px 28px 112px;
  text-align: center;
}

.hero .eyebrow {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.72;
  margin: 0 0 14px;
  color: #ffffff;
}

.hero h1 {
  font-size: 64px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 auto 18px;
  max-width: 760px;
  /* Gradient text — falls back gracefully on browsers without bg-clip */
  background: linear-gradient(135deg, var(--motum-orange) 0%, var(--motum-pink) 50%, #ffffff 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p.tagline {
  font-size: 21px;
  line-height: 1.5;
  margin: 0 auto 36px;
  max-width: 560px;
  color: rgba(255, 255, 255, 0.88);
}

.hero-cta {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

/* Apple App Store badge */
.app-store-badges {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.app-store-badge {
  display: inline-block;
  line-height: 0;
}

.app-store-badge img {
  height: 50px;
  width: auto;
}

.app-store-badge:hover {
  opacity: 0.85;
}

.hero-cta .btn {
  height: 50px;
  padding-top: 0;
  padding-bottom: 0;
  box-sizing: border-box;
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--text); }

/* Mobile */
@media (max-width: 600px) {
  h1 { font-size: 36px; }
  h2 { font-size: 24px; margin: 40px 0 12px; }
  .lede { font-size: 18px; }
  main { padding: 48px 20px 64px; }

  .hero { padding: 72px 22px 84px; }
  .hero h1 { font-size: 44px; }
  .hero p.tagline { font-size: 18px; }
}