/* Phone Mouse — phonemouse.app
 * Vanilla CSS. Apple/iOS aesthetic — mirrors Flutter app tokens
 * (docs/05-design-system.md) so the website and app feel like one product.
 */

:root {
  /* Color tokens — light mode */
  --bg-canvas: #FFFFFF;
  --bg-surface: #F2F2F7;
  --bg-elevated: #FFFFFF;
  --text-primary: #000000;
  --text-secondary: rgba(60, 60, 67, 0.6);
  --text-tertiary: rgba(60, 60, 67, 0.3);
  --divider: rgba(60, 60, 67, 0.18);
  --accent: #007AFF;
  --on-accent: #FFFFFF;
  --success: #34C759;

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-xxl: 48px;
  --space-section: 96px;

  /* Radii */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 22px;

  /* Typography */
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-canvas: #000000;
    --bg-surface: #1C1C1E;
    --bg-elevated: #2C2C2E;
    --text-primary: #FFFFFF;
    --text-secondary: rgba(235, 235, 245, 0.6);
    --text-tertiary: rgba(235, 235, 245, 0.3);
    --divider: rgba(84, 84, 88, 0.6);
    --accent: #0A84FF;
  }
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-system);
  font-size: 17px;
  line-height: 1.5;
  scroll-behavior: smooth;
}

h1, h2, h3 {
  margin: 0;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(40px, 6vw, 64px); font-weight: 700; line-height: 1.05; }
h2 { font-size: clamp(28px, 4vw, 44px); font-weight: 700; line-height: 1.1; }
h3 { font-size: 20px; font-weight: 600; }

p { margin: 0; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 150ms ease;
}
a:hover { opacity: 0.7; }

/* ---- NAV --------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  background: color-mix(in srgb, var(--bg-canvas) 90%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--divider);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-primary);
  font-weight: 600;
}
.brand-mark { color: var(--accent); font-size: 22px; line-height: 1; }
.brand-name { font-size: 17px; }
.nav-links {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}
.nav-links a {
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
}
.store-badge {
  background: var(--accent);
  color: var(--on-accent) !important;
  padding: 6px 14px;
  border-radius: var(--r-sm);
}

/* ---- HERO -------------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-xxl);
  align-items: center;
  padding: var(--space-section) var(--space-xl);
  max-width: 1200px;
  margin: 0 auto;
}
.hero h1 { margin-bottom: var(--space-lg); }
.lede {
  font-size: 22px;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}
.cta-row {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--text-primary);
  color: var(--bg-canvas) !important;
  padding: 12px 22px;
  border-radius: var(--r-md);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.2;
  transition: transform 200ms ease;
}
.cta strong { font-size: 16px; font-weight: 600; }
.cta-small { opacity: 0.8; }
.cta:hover { transform: scale(1.02); opacity: 1; }
.cta-glyph { font-size: 24px; }

.hero-video {
  aspect-ratio: 9 / 16;
  background: var(--bg-surface);
  border-radius: var(--r-lg);
  overflow: hidden;
  max-width: 320px;
  margin: 0 auto;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}
.hero-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; padding: var(--space-xxl) var(--space-lg); }
}

/* ---- SECTIONS ---------------------------------------------------------- */
section {
  padding: var(--space-section) var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
}
section h2 { margin-bottom: var(--space-xl); }

/* ---- HOW IT WORKS ------------------------------------------------------ */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  counter-reset: step;
}
.steps li {
  background: var(--bg-surface);
  border-radius: var(--r-lg);
  padding: var(--space-xl);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  margin-bottom: var(--space-md);
}
.steps h3 { margin-bottom: var(--space-sm); }
.steps p { color: var(--text-secondary); font-size: 15px; }

@media (max-width: 720px) {
  .steps { grid-template-columns: 1fr; }
}

/* ---- FEATURE GRID ------------------------------------------------------ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}
.feature {
  background: var(--bg-surface);
  border-radius: var(--r-lg);
  padding: var(--space-xl);
}
.feature h3 { margin-bottom: var(--space-sm); }
.feature p { color: var(--text-secondary); font-size: 15px; }

@media (max-width: 720px) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* ---- DOWNLOAD ---------------------------------------------------------- */
.download .subhead {
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}
.dl-card {
  display: block;
  text-align: center;
  background: var(--bg-surface);
  border-radius: var(--r-lg);
  padding: var(--space-xxl) var(--space-lg);
  color: var(--text-primary) !important;
  text-decoration: none;
  transition: transform 200ms ease, background 200ms ease;
}
.dl-card:hover {
  transform: translateY(-4px);
  background: var(--bg-elevated);
}
.dl-glyph {
  font-size: 48px;
  margin-bottom: var(--space-md);
}
.dl-meta {
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: var(--space-xs);
}

@media (max-width: 720px) {
  .download-grid { grid-template-columns: 1fr; }
}

/* ---- PRIVACY ----------------------------------------------------------- */
.privacy-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-md);
  font-size: 18px;
}
.privacy-list li {
  background: var(--bg-surface);
  border-radius: var(--r-md);
  padding: var(--space-lg) var(--space-xl);
}

/* ---- FAQ --------------------------------------------------------------- */
.faq details {
  background: var(--bg-surface);
  border-radius: var(--r-md);
  margin-bottom: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
}
.faq summary {
  font-weight: 600;
  cursor: pointer;
  padding: var(--space-sm) 0;
  list-style: none;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  font-size: 22px;
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1;
}
.faq details[open] summary::after { content: "−"; }
.faq p {
  margin-top: var(--space-sm);
  color: var(--text-secondary);
  font-size: 15px;
}

/* ---- FOOTER ------------------------------------------------------------ */
.footer {
  padding: var(--space-xxl) var(--space-xl);
  text-align: center;
  border-top: 1px solid var(--divider);
  color: var(--text-secondary);
  font-size: 13px;
}
.footer a { color: var(--text-secondary); }

/* ---- LEGAL / GET PAGES (shared) ---------------------------------------- */
.page-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-section) var(--space-xl);
}
.page-narrow h1 { font-size: 40px; margin-bottom: var(--space-xl); }
.page-narrow h2 { font-size: 22px; margin: var(--space-xl) 0 var(--space-sm); }
.page-narrow p, .page-narrow ul { margin-bottom: var(--space-md); }
.page-narrow ul { padding-left: var(--space-xl); }
.page-narrow .updated { color: var(--text-secondary); font-size: 13px; }