:root {
  --bg: #1B1F22;
  --surface: #2A3238;
  --accent: #00CFE0;
  --eco: #62D26F;
  --text: #F2F4F6;
  --muted: #9aa7ae;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(0, 207, 224, 0.12), transparent 55%),
    radial-gradient(900px 400px at 100% 0%, rgba(98, 210, 111, 0.08), transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
header, main, footer {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 20px;
}
header {
  padding-top: 36px;
  padding-bottom: 0;
}
.brand {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
h1 {
  margin: 0.35em 0 0.4em;
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  line-height: 1.2;
  color: var(--text);
}
.lead { color: var(--muted); font-size: 1.05rem; max-width: 42em; }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  margin: 1.25rem 0 0;
  font-size: 0.95rem;
}
.card-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  display: grid;
  gap: 0.75rem;
}
.card-list a {
  display: block;
  padding: 1rem 1.1rem;
  background: rgba(42, 50, 56, 0.85);
  border-left: 3px solid var(--accent);
}
.card-list a:hover {
  background: rgba(42, 50, 56, 1);
  text-decoration: none;
}
.card-list strong { display: block; color: var(--text); }
.card-list span { color: var(--muted); font-size: 0.92rem; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 0.65rem 0.55rem;
  border-bottom: 1px solid rgba(242, 244, 246, 0.12);
  vertical-align: top;
}
th { color: var(--accent); font-weight: 600; }
.note {
  background: rgba(0, 207, 224, 0.08);
  border: 1px solid rgba(0, 207, 224, 0.25);
  padding: 0.9rem 1rem;
  margin: 1.25rem 0;
}
.ok { color: var(--eco); }
.muted { color: var(--muted); }
code { color: var(--accent); font-size: 0.92em; }
footer {
  padding-top: 0;
  padding-bottom: 48px;
  color: var(--muted);
  font-size: 0.9rem;
}
ul.plain { padding-left: 1.2rem; }