:root {
  color-scheme: light;
  --bg: #f8fafc;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #dbe3ef;
  --blue: #1479d2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  background: linear-gradient(135deg, #0ea5e9, #1d4ed8);
  color: #fff;
  padding: 42px 24px;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.brand img { width: 48px; height: 48px; }
.brand strong { font-size: 20px; }

nav {
  margin-left: auto;
  display: flex;
  gap: 14px;
}

nav a {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  font-weight: 700;
}

h1 {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.02;
  margin: 0 0 16px;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 24px;
  margin: 34px 0 10px;
}

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

header p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
  max-width: 680px;
}

main { padding: 36px 0 56px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 14px 45px rgba(15, 23, 42, 0.06);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}

.card strong {
  display: block;
  margin-bottom: 6px;
}

a { color: var(--blue); }
ul { padding-left: 22px; }
li { margin: 8px 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 14px;
}

th, td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th { background: #f1f5f9; }

footer {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  color: #64748b;
  font-size: 14px;
}

code {
  background: #eef2f7;
  border-radius: 4px;
  padding: 2px 5px;
}