/* Reef — reef-media.app
   One stylesheet for every page. Light by default, dark via the system
   setting. Palette lifted from the app icon: navy depths, teal water,
   sunlit aqua. */

:root {
  color-scheme: light dark;
  --ink: #0b2a4a;
  --ink-soft: #35536f;
  --ink-mute: #5f7a92;
  --water-top: #cfeff3;
  --water-mid: #8fd3de;
  --water-deep: #1b7fa0;
  --sea: #0f5f7a;
  --sea-bright: #1798b8;
  --accent: #1e88c7;
  --accent-ink: #ffffff;
  --glass: rgba(255, 255, 255, 0.62);
  --glass-strong: rgba(255, 255, 255, 0.86);
  --glass-line: rgba(255, 255, 255, 0.75);
  --line: rgba(11, 42, 74, 0.12);
  --shadow: 0 18px 50px rgba(11, 42, 74, 0.16);
  --radius: 22px;
  --radius-sm: 14px;
  --max: 1100px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Inter, Segoe UI, Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e6f2f7;
    --ink-soft: #b9d0dc;
    --ink-mute: #8aa6b8;
    --water-top: #0c3552;
    --water-mid: #0a2540;
    --water-deep: #061729;
    --sea: #9fdcef;
    --sea-bright: #6cc7e3;
    --accent: #5ab8e8;
    --accent-ink: #06202f;
    --glass: rgba(16, 52, 80, 0.55);
    --glass-strong: rgba(16, 52, 80, 0.82);
    --glass-line: rgba(160, 214, 232, 0.22);
    --line: rgba(160, 214, 232, 0.14);
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--water-deep);
  background-image:
    radial-gradient(120% 70% at 50% -10%, var(--water-top) 0%, var(--water-mid) 45%, var(--water-deep) 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip {
  position: absolute; left: -999px; top: 8px;
  background: var(--glass-strong); padding: 8px 14px; border-radius: 10px; z-index: 10;
}
.skip:focus { left: 8px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

/* Header ---------------------------------------------------------------- */

.top {
  position: sticky; top: 0; z-index: 5;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background: color-mix(in srgb, var(--glass) 80%, transparent);
  border-bottom: 1px solid var(--glass-line);
}
.top .wrap { display: flex; align-items: center; gap: 18px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 18px; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.top nav { margin-left: auto; display: flex; gap: 4px; }
.top nav a {
  color: var(--ink-soft); padding: 8px 12px; border-radius: 999px; font-weight: 500;
}
.top nav a:hover, .top nav a[aria-current="page"] { background: var(--glass); color: var(--ink); text-decoration: none; }

/* Hero ------------------------------------------------------------------ */

.hero { padding: 72px 0 40px; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(38px, 6vw, 62px); line-height: 1.04; letter-spacing: -0.02em; margin: 0 0 18px; }
.hero p.lead { font-size: 21px; color: var(--ink-soft); margin: 0 0 28px; max-width: 34em; }
.hero .icon { width: 84px; height: 84px; border-radius: 20px; box-shadow: var(--shadow); margin-bottom: 26px; }
.phone {
  justify-self: center; width: min(100%, 320px);
  border-radius: 40px; box-shadow: var(--shadow); overflow: hidden;
  border: 1px solid var(--glass-line);
}
.phone img { display: block; width: 100%; height: auto; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--accent); color: var(--accent-ink);
  padding: 13px 20px; border-radius: 999px; font-weight: 600;
}
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.btn.ghost { background: var(--glass); color: var(--ink); border: 1px solid var(--glass-line); }
.note { color: var(--ink-soft); font-size: 15px; }

/* Cards ----------------------------------------------------------------- */

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.card {
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: 0 8px 30px rgba(11, 42, 74, 0.08);
}
.card h3 { margin: 0 0 8px; font-size: 20px; }
.card p, .card li { color: var(--ink-soft); margin: 0; }
.card ul { padding-left: 18px; margin: 8px 0 0; }
.card li { margin-bottom: 4px; }
.card .glyph { font-size: 26px; line-height: 1; margin-bottom: 14px; display: block; }

section { padding: 44px 0; }
section h2 { font-size: clamp(28px, 4vw, 38px); letter-spacing: -0.015em; margin: 0 0 8px; }
section .sub { color: var(--ink-soft); font-size: 19px; margin: 0 0 28px; max-width: 40em; }

.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: start; }
.shots figure { margin: 0; }
.shots img { width: 100%; height: auto; border-radius: 28px; box-shadow: var(--shadow); border: 1px solid var(--glass-line); }
.shots figcaption { text-align: center; color: var(--ink-mute); font-size: 15px; margin-top: 10px; }

/* Documents (privacy, support) ----------------------------------------- */

.doc { max-width: 760px; margin: 0 auto; padding: 52px 22px 80px; }
.doc .card { padding: 36px; }
.doc h1 { font-size: clamp(32px, 5vw, 44px); letter-spacing: -0.02em; margin: 0 0 6px; }
.doc .meta { color: var(--ink-mute); margin: 0 0 26px; }
.doc h2 { font-size: 24px; margin: 34px 0 10px; }
.doc h3 { font-size: 19px; margin: 24px 0 6px; }
.doc p, .doc li { color: var(--ink-soft); }
.doc ul { padding-left: 20px; }
.doc li { margin-bottom: 6px; }
.doc code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.92em; background: var(--line); padding: 2px 6px; border-radius: 6px; }
.doc .summary {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border-left: 4px solid var(--accent);
  border-radius: 10px; padding: 14px 18px; margin: 0 0 20px;
}
.doc .summary p { margin: 0; color: var(--ink); }
.doc details { border-top: 1px solid var(--line); padding: 12px 0; }
.doc details:last-of-type { border-bottom: 1px solid var(--line); }
.doc summary { cursor: pointer; font-weight: 600; color: var(--ink); font-size: 18px; padding: 4px 0; }
.doc details p { margin: 8px 0 0; }

/* Footer ---------------------------------------------------------------- */

footer { padding: 40px 0 60px; color: var(--ink-mute); font-size: 15px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; }
footer a { color: var(--ink-soft); }
footer .legal { flex-basis: 100%; margin-top: 8px; }

/* Responsive ------------------------------------------------------------ */

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 44px; }
  .phone { width: min(100%, 280px); }
  .shots { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
  .top nav a { padding: 8px 10px; }
}