:root {
  color-scheme: light dark;
  --bg: #f7f9f7;
  --surface: #ffffff;
  --surface-soft: #eef4f0;
  --text: #151917;
  --muted: #65716b;
  --border: #dce8e1;
  --accent: #5b8a72;
  --accent-strong: #2f6f58;
  --mint: #8fbcab;
  --sand: #c4a882;
  --shadow: 0 18px 55px rgba(30, 48, 39, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101412;
    --surface: #171d1a;
    --surface-soft: #1d2823;
    --text: #f2f7f4;
    --muted: #a3b1aa;
    --border: #2a3832;
    --accent: #8fbcab;
    --accent-strong: #a9d5c5;
    --shadow: 0 18px 55px rgba(0, 0, 0, 0.34);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 14% 10%, rgba(143, 188, 171, 0.22), transparent 30%),
    linear-gradient(180deg, var(--bg), var(--surface-soft));
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

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

.shell {
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: 0 10px 28px rgba(47, 111, 88, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(300px, 0.94fr);
  gap: 40px;
  align-items: center;
  padding: 52px 0 64px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
}

h1 {
  max-width: 720px;
  margin: 18px 0 16px;
  font-size: clamp(42px, 8vw, 78px);
  line-height: 0.96;
  letter-spacing: 0;
}

.lead {
  max-width: 650px;
  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: 46px;
  padding: 0 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-weight: 750;
}

.button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--mint));
  color: white;
}

.phone {
  position: relative;
  min-height: 540px;
  border: 1px solid var(--border);
  border-radius: 42px;
  background:
    linear-gradient(160deg, rgba(143, 188, 171, 0.24), transparent 35%),
    var(--surface);
  box-shadow: var(--shadow);
  padding: 22px;
  overflow: hidden;
}

.phone::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 50%;
  width: 110px;
  height: 28px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: #070908;
}

.phone-card {
  margin-top: 72px;
  padding: 22px;
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 18px 46px rgba(26, 51, 39, 0.13);
}

.session-ring {
  width: 210px;
  height: 210px;
  margin: 22px auto 18px;
  border-radius: 999px;
  background:
    radial-gradient(circle at center, var(--surface) 0 46%, transparent 47%),
    conic-gradient(var(--accent) 0 74%, rgba(91, 138, 114, 0.15) 74% 100%);
  display: grid;
  place-items: center;
}

.session-ring img {
  width: 74px;
  height: 74px;
  border-radius: 18px;
}

.timer {
  text-align: center;
  color: var(--accent);
  font-size: 58px;
  font-weight: 300;
  line-height: 1;
}

.section {
  padding: 54px 0;
}

.section h2 {
  margin: 0 0 12px;
  font-size: 34px;
  letter-spacing: 0;
}

.section p {
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.card {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
}

.card h3 {
  margin: 0 0 8px;
}

.legal {
  max-width: 840px;
  padding: 34px 0 70px;
}

.legal h1 {
  font-size: clamp(36px, 6vw, 58px);
}

.legal h2 {
  margin-top: 32px;
  font-size: 22px;
}

.legal p,
.legal li {
  color: var(--muted);
}

.notice {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 30px 0 42px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

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

@media (max-width: 820px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 24px;
  }

  .phone {
    min-height: 480px;
  }

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

@media (max-width: 520px) {
  .shell {
    width: min(100% - 28px, 1040px);
  }

  .nav-links {
    gap: 12px;
    font-size: 13px;
  }

  .lead {
    font-size: 17px;
  }

  .phone {
    border-radius: 30px;
    padding: 16px;
  }

  .timer {
    font-size: 46px;
  }
}