:root {
  color-scheme: dark;
  --bg: #030712;
  --surface: #0b1020;
  --surface-2: #10172a;
  --text: #f8fafc;
  --muted: #94a3b8;
  --border: rgba(148, 163, 184, 0.2);
  --violet: #a855f7;
  --cyan: #22d3ee;
  --pink: #ec4899;
  --danger: #fb7185;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 0%, rgba(168, 85, 247, 0.12), transparent 32rem),
    radial-gradient(circle at 90% 15%, rgba(34, 211, 238, 0.08), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: #67e8f9; text-decoration: none; }
a:hover { text-decoration: underline; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(3, 7, 18, 0.88);
  backdrop-filter: blur(16px);
}

.nav-inner, .container, .footer-inner {
  width: min(100% - 32px, 980px);
  margin: 0 auto;
}

.nav-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.brand span { background: linear-gradient(90deg, var(--text) 30%, var(--violet), var(--cyan)); -webkit-background-clip: text; color: transparent; }
.links { display: flex; flex-wrap: wrap; gap: 16px; font-size: 0.9rem; }
.links a { color: var(--muted); }

.container { padding: 64px 0 80px; }
.hero { padding: 32px 0 42px; }
.eyebrow { color: var(--cyan); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
h1 { max-width: 780px; margin: 10px 0 14px; font-size: clamp(2.25rem, 6vw, 4.5rem); line-height: 1.05; letter-spacing: 0; }
.lead { max-width: 760px; color: var(--muted); font-size: 1.1rem; }
.effective { margin-top: 18px; color: var(--muted); font-size: 0.9rem; }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.card, .section {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(16, 23, 42, 0.92), rgba(7, 12, 25, 0.96));
}
.card { padding: 24px; min-height: 170px; }
.card h2 { margin-top: 0; font-size: 1.2rem; }
.card p { color: var(--muted); }
.section { margin: 16px 0; padding: 28px; }
.section h2 { margin: 0 0 12px; font-size: 1.35rem; }
.section h3 { margin: 24px 0 8px; font-size: 1rem; color: #c4b5fd; }
.section p, .section li { color: #cbd5e1; }
.section li + li { margin-top: 7px; }
.notice { border-left: 3px solid var(--cyan); }
.warning { border-left: 3px solid var(--danger); }
.tr-summary { border-left: 3px solid var(--violet); }
.button { display: inline-flex; align-items: center; min-height: 48px; padding: 0 20px; border-radius: 8px; background: linear-gradient(90deg, var(--violet), var(--pink)); color: white; font-weight: 800; }
.button:hover { text-decoration: none; filter: brightness(1.08); }
code { color: #bae6fd; }

footer { border-top: 1px solid var(--border); color: var(--muted); }
.footer-inner { padding: 28px 0 44px; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

@media (max-width: 720px) {
  .nav-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; gap: 10px; }
  .links { gap: 12px; }
  .container { padding-top: 36px; }
  .grid { grid-template-columns: 1fr; }
  .section { padding: 22px; }
}