/* Water Tracker — mirrors the app's Theme (WaterKit/UI/Theme.swift). */
:root {
  --water-light: #6fdcff;
  --water-deep: #1673ff;
  --accent: #1a8cff;
  --success: #22c993;
  --bg: #f1f6fb;
  --card: #ffffff;
  --text: #0b1726;
  --muted: #5b6b7d;
  --line: #dde7f1;
  --water: linear-gradient(180deg, var(--water-light), var(--water-deep));
  --radius: 28px;
  --font: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #050e19;
    --card: #0d1b2b;
    --text: #eef4fb;
    --muted: #97a8bb;
    --line: #17293d;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1, h2 { line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 16px; }
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
.lead { font-size: 1.2rem; color: var(--muted); margin: 0 0 28px; }
.small { font-size: 0.92rem; color: var(--muted); }

/* Header */
.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px max(20px, calc((100% - 1120px) / 2));
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); font-size: 1.1rem; }
.brand img { border-radius: 9px; }
.top nav { display: flex; gap: 22px; font-weight: 600; font-size: 0.98rem; }
.top nav a { color: var(--muted); }
.top nav a:hover { color: var(--text); text-decoration: none; }

main { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* Hero */
.hero {
  display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 48px;
  padding: 72px 0 40px;
}
.hero .icon { border-radius: 22px; margin-bottom: 24px; box-shadow: 0 12px 32px rgb(22 115 255 / 0.3); }
.hero .media { position: relative; height: 640px; }
.hero .phone { position: absolute; width: 290px; }
.hero .phone.front { right: 40px; top: 0; }
.hero .phone.back { right: 250px; top: 70px; transform: rotate(-6deg); opacity: 0.95; }
.badge { display: inline-block; margin: 4px 0 12px; }
.badge img { height: 54px; width: auto; }

/* Device frames */
.phone {
  margin: 0; padding: 10px; background: #0c0e12; border-radius: 46px;
  box-shadow: 0 30px 60px rgb(0 40 110 / 0.25);
}
.phone img { border-radius: 37px; width: 100%; }
.watch {
  margin: 0 auto; width: 230px; padding: 16px; background: #0c0e12; border-radius: 64px;
  box-shadow: 0 30px 60px rgb(0 40 110 / 0.25);
}
.watch img { border-radius: 48px; }
@media (prefers-color-scheme: dark) {
  /* Keep the black device bodies visible on the dark background. */
  .phone, .watch { box-shadow: 0 0 0 1.5px rgb(255 255 255 / 0.12), 0 30px 60px rgb(0 0 0 / 0.5); }
}

/* Features */
.feature {
  display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 56px;
  padding: 56px 0; border-top: 1px solid var(--line);
}
.feature:nth-child(even) .copy { order: 2; }
.feature .media .phone { width: 300px; margin: 0 auto; }
.feature ul { padding: 0; margin: 0; list-style: none; }
.feature li { position: relative; padding: 8px 0 8px 34px; font-size: 1.08rem; }
.feature li::before {
  content: ""; position: absolute; left: 0; top: 14px; width: 18px; height: 18px;
  background: var(--water); border-radius: 50% 50% 50% 0; transform: rotate(-45deg);
}
.feature.text-only { grid-template-columns: 1fr; text-align: center; }
.feature.text-only .copy {
  max-width: 720px; margin: 0 auto; padding: 40px; background: var(--card); border-radius: var(--radius);
}
.feature p { font-size: 1.1rem; color: var(--muted); }

/* Gallery */
.gallery { padding: 56px 0; border-top: 1px solid var(--line); }
.gallery ul {
  display: grid; grid-auto-flow: column; grid-auto-columns: 250px; gap: 28px;
  overflow-x: auto; scroll-snap-type: x mandatory; padding: 8px 4px 32px; margin: 0; list-style: none;
}
.gallery li { scroll-snap-align: start; }
.gallery li p { font-weight: 700; min-height: 3.2em; margin: 0 0 12px; }

/* What's new + CTA */
.news { padding: 48px; background: var(--card); border-radius: var(--radius); margin: 24px 0 56px; }
.news ul { columns: 2; column-gap: 40px; padding-left: 20px; }
.news li { break-inside: avoid; padding: 4px 0; }
.news p { color: var(--muted); margin-bottom: 0; }
.cta {
  text-align: center; padding: 64px 24px; margin-bottom: 64px; border-radius: var(--radius);
  background: var(--water); color: #fff;
}
.cta .badge img { margin: 0 auto; }

/* Docs (support, privacy) */
.doc { max-width: 760px; padding-top: 64px; padding-bottom: 64px; }
.doc h2 { font-size: 1.35rem; margin-top: 36px; }
.doc p { font-size: 1.06rem; }
.faq details {
  background: var(--card); border-radius: 18px; padding: 18px 22px; margin: 12px 0;
}
.faq summary { font-weight: 700; cursor: pointer; font-size: 1.08rem; }
.faq details p { color: var(--muted); margin: 12px 0 0; }
.button {
  display: inline-block; padding: 12px 22px; border-radius: 999px; font-weight: 700;
  background: var(--water); color: #fff;
}
.button:hover { text-decoration: none; filter: brightness(1.05); }

/* Footer */
footer {
  border-top: 1px solid var(--line); padding: 28px 20px 40px; text-align: center; color: var(--muted); font-size: 0.92rem;
}
.languages { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 18px; margin-bottom: 12px; }
.languages a[aria-current] { color: var(--text); font-weight: 700; }

@media (max-width: 860px) {
  .hero, .feature { grid-template-columns: 1fr; text-align: center; gap: 32px; }
  .feature:nth-child(even) .copy { order: 0; }
  .feature ul { display: inline-block; text-align: left; }
  .hero { padding-top: 40px; }
  .hero .icon, .hero .badge img { margin-left: auto; margin-right: auto; }
  .hero .media { height: 520px; }
  .hero .phone { width: 230px; }
  .hero .phone.front { right: 50%; transform: translateX(65%); }
  .hero .phone.back { right: 50%; transform: translateX(-10%) rotate(-6deg); }
  .news { padding: 28px; }
  .news ul { columns: 1; }
  .top nav { gap: 14px; font-size: 0.9rem; }
}
@media (max-width: 480px) {
  .brand span, .top .brand { font-size: 0; }
  .brand img { width: 32px; height: 32px; }
}