:root {
  --bg: #0b1020;
  --panel: #131a2e;
  --panel-2: #18213a;
  --text: #edf2ff;
  --muted: #a9b6d3;
  --accent: #7cc4ff;
  --accent-2: #8ef0c1;
  --border: #2a365c;
  --warn: #ffd28a;
  --max: 880px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, #0a0f1d 0%, #0f1730 100%);
  color: var(--text);
  font: 16px/1.6 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: var(--accent); }
a:hover { color: #b0dcff; }

.container {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

header {
  padding: 28px 0 10px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}

nav a {
  text-decoration: none;
  color: var(--muted);
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 10px;
}

nav a:hover {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255,255,255,0.03);
}

.hero, .card {
  background: rgba(19, 26, 46, 0.88);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
  margin: 18px 0;
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}

.hero h1, h2, h3 {
  line-height: 1.2;
  margin-top: 0;
}

.lead {
  font-size: 1.1rem;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.badge {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--accent-2);
  background: rgba(142, 240, 193, 0.08);
  font-size: 0.92rem;
}

.note {
  border-left: 4px solid var(--accent);
  padding: 14px 16px;
  background: rgba(124, 196, 255, 0.08);
  border-radius: 12px;
  color: var(--text);
}

.warn {
  border-left: 4px solid var(--warn);
  padding: 14px 16px;
  background: rgba(255, 210, 138, 0.08);
  border-radius: 12px;
}

.form-demo {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}

label {
  display: block;
  margin-top: 14px;
  margin-bottom: 6px;
  font-weight: 600;
}

input, textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
}

textarea { min-height: 120px; }

.checkrow {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 16px;
}

.checkrow input {
  width: auto;
  margin-top: 4px;
}

button {
  margin-top: 16px;
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  background: linear-gradient(90deg, var(--accent), #9fbbff);
  color: #08111f;
  font-weight: 700;
}

.small {
  color: var(--muted);
  font-size: 0.94rem;
}

ul, ol { padding-left: 20px; }
footer {
  padding: 18px 0 40px;
  color: var(--muted);
}

code {
  background: rgba(255,255,255,0.06);
  padding: 2px 6px;
  border-radius: 6px;
}