:root {
  --ink: #10221b;
  --muted: #63716b;
  --soft: #eef7f1;
  --paper: #fffdf7;
  --line: rgba(16, 34, 27, 0.12);
  --green: #31c765;
  --green-deep: #0d4f2a;
  --aqua: #3cc9d8;
  --sun: #f5d66b;
  --shadow: 0 24px 80px rgba(16, 34, 27, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: ui-rounded, "SF Pro Rounded", "SF Pro Display", "PingFang SC", "Hiragino Sans", system-ui, sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(245, 214, 107, 0.34), transparent 28%),
    radial-gradient(circle at 88% 14%, rgba(60, 201, 216, 0.22), transparent 30%),
    linear-gradient(180deg, #f8fbf6 0%, #edf8f0 58%, #fffdf7 100%);
  line-height: 1.55;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(248, 251, 246, 0.82);
  border-bottom: 1px solid rgba(16, 34, 27, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: 0 10px 22px rgba(16, 34, 27, 0.18);
}

.nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
}

.nav a {
  text-decoration: none;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 430px);
  gap: clamp(32px, 6vw, 74px);
  align-items: center;
  min-height: 74vh;
  padding: clamp(56px, 8vw, 104px) clamp(20px, 5vw, 72px) 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--green-deep);
  font-size: 15px;
  font-weight: 800;
}

.eyebrow::before {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--green);
  content: "";
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.08;
}

h1 {
  max-width: 820px;
  font-size: clamp(48px, 8vw, 96px);
}

.hero-copy {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(19px, 2.3vw, 25px);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 850;
}

.button.primary {
  color: white;
  background: linear-gradient(135deg, var(--green), #19a84f);
  box-shadow: 0 16px 34px rgba(49, 199, 101, 0.28);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--line);
}

.watch-card {
  position: relative;
  min-height: 520px;
  border-radius: 56px;
  background:
    radial-gradient(circle at 64% 4%, rgba(49, 199, 101, 0.28), transparent 27%),
    linear-gradient(160deg, #091610, #06110d 68%, #10291b);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.watch-card::before {
  position: absolute;
  inset: 34px 28px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 44px;
  content: "";
}

.watch-screen {
  position: absolute;
  inset: 54px 42px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 22px;
  color: white;
}

.watch-screen img {
  width: 92px;
  height: 92px;
  border-radius: 24px;
}

.rounds {
  font-size: 72px;
  font-weight: 900;
  line-height: 1;
}

.rhythm {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
}

.rhythm span {
  padding: 12px 8px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
  text-align: center;
  font-weight: 850;
}

.section {
  padding: 42px clamp(20px, 5vw, 72px);
}

.section-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.section-title {
  max-width: 760px;
  margin-bottom: 26px;
  font-size: clamp(34px, 5vw, 56px);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.tile,
.content-card {
  border: 1px solid rgba(16, 34, 27, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 16px 44px rgba(16, 34, 27, 0.08);
}

.tile {
  padding: 26px;
}

.tile-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: var(--soft);
  color: var(--green-deep);
  font-size: 24px;
  font-weight: 900;
}

.tile h3 {
  font-size: 22px;
}

.tile p,
.content-card p,
.content-card li {
  color: var(--muted);
}

.content-card {
  max-width: 920px;
  padding: clamp(24px, 4vw, 42px);
}

.content-card h1 {
  font-size: clamp(40px, 6vw, 72px);
}

.content-card h2 {
  margin-top: 36px;
  font-size: 28px;
}

.content-card h3 {
  margin-top: 24px;
  font-size: 20px;
}

.content-card ul {
  padding-left: 20px;
}

.content-card .lead {
  color: var(--muted);
  font-size: 20px;
}

.lang-block {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.support-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.support-item {
  padding: 18px 20px;
  border-radius: 8px;
  background: rgba(238, 247, 241, 0.74);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  padding: 48px clamp(20px, 5vw, 72px);
  color: var(--muted);
}

.footer a {
  margin-left: 18px;
  text-decoration: none;
}

@media (max-width: 840px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .watch-card {
    min-height: 430px;
  }

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

@media (max-width: 520px) {
  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    font-size: 14px;
  }

  .actions .button {
    width: 100%;
  }

  .watch-card {
    border-radius: 38px;
  }

  .watch-screen {
    inset: 42px 28px;
  }

  .rounds {
    font-size: 58px;
  }
}