:root {
  color-scheme: light dark;
  --bg: #f8faf8;
  --text: #111814;
  --muted: #55625a;
  --line: #d9e2dc;
  --panel: #ffffff;
  --accent: #12a150;
  --accent-strong: #08783a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d120f;
    --text: #f3f7f4;
    --muted: #aab7af;
    --line: #26342b;
    --panel: #141c17;
    --accent: #39d77a;
    --accent-strong: #80efa9;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--accent-strong);
}

.site-header,
.site-main,
.site-footer {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0;
}

.brand {
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1.1fr) minmax(220px, 0.7fr);
  align-items: center;
  min-height: 58vh;
  padding: 40px 0 56px;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 720px;
  margin: 10px 0 16px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 0.98;
}

h2 {
  margin: 0 0 14px;
  font-size: 28px;
  line-height: 1.15;
}

h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

p {
  margin: 0 0 16px;
}

.lede {
  max-width: 620px;
  color: var(--muted);
  font-size: 20px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #061109;
}

.watch-preview {
  display: grid;
  place-items: center;
}

.watch-case {
  display: grid;
  place-items: center;
  width: min(270px, 72vw);
  aspect-ratio: 0.82;
  border: 10px solid #202720;
  border-radius: 34%;
  background: #050805;
  box-shadow: inset 0 0 0 2px #3b453d, 0 24px 70px rgba(0, 0, 0, 0.24);
}

.watch-screen {
  display: grid;
  place-items: center;
  width: 78%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, #162218 0 58%, #0a0f0b 59% 100%);
}

.ring {
  display: grid;
  place-items: center;
  width: 82%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    conic-gradient(from -90deg, #39d77a 0 68%, rgba(255, 255, 255, 0.14) 68% 100%);
}

.ring-inner {
  display: grid;
  place-items: center;
  width: 78%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #050805;
  color: #f6fff8;
  font-size: 30px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.section {
  padding: 46px 0;
  border-top: 1px solid var(--line);
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  min-height: 150px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.card p,
.section p,
.site-footer {
  color: var(--muted);
}

.content {
  max-width: 720px;
  padding: 34px 0 56px;
}

.content ul {
  padding-left: 22px;
}

.content li {
  margin: 8px 0;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 24px;
  }

  .watch-preview {
    justify-content: start;
  }
}