:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #111827;
  --muted: #5f6b7a;
  --line: #dfe5ee;
  --accent: #007aff;
  --accent-soft: #e8f2ff;
  --shadow: 0 24px 60px rgba(18, 31, 53, 0.10);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 16%, rgba(0, 122, 255, 0.10), transparent 34rem),
    radial-gradient(circle at 88% 10%, rgba(45, 212, 191, 0.12), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
}

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

.shell {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 96px;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 18px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.15;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(42px, 7vw, 76px);
  letter-spacing: 0;
}

h2 {
  margin: 44px 0 14px;
  font-size: 28px;
}

h3 {
  margin: 28px 0 10px;
  font-size: 20px;
}

.lead {
  max-width: 760px;
  margin: 0 0 36px;
  color: var(--muted);
  font-size: 21px;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 32px 0 42px;
}

.top-nav a,
.pill {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
}

.panel,
.app-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
}

.panel {
  padding: clamp(24px, 5vw, 44px);
}

.card-list {
  display: grid;
  gap: 16px;
}

.app-card {
  display: flex;
  gap: 18px;
  align-items: center;
  padding: 22px;
  color: var(--text);
  text-decoration: none;
}

.app-card small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
}

.app-icon {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 54px;
  height: 54px;
  border-radius: 15px;
  background: var(--accent);
  color: white;
  font-size: 28px;
  font-weight: 800;
}

.doc-meta {
  color: var(--muted);
  font-size: 15px;
}

.notice {
  margin: 24px 0;
  padding: 16px 18px;
  border: 1px solid #b8d7ff;
  border-radius: 14px;
  background: var(--accent-soft);
}

ul {
  padding-left: 22px;
}

li + li {
  margin-top: 6px;
}

.footer {
  margin-top: 52px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 28px, 980px);
    padding-top: 42px;
  }

  .lead {
    font-size: 18px;
  }
}