:root {
  --bg: #080a0f;
  --bg-soft: #111522;
  --card: rgba(22, 28, 43, 0.82);
  --line: rgba(106, 166, 255, 0.22);
  --text: #eef3ff;
  --muted: #a6b4d3;
  --accent: #5fb0ff;
  --accent-2: #4de5bd;
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 500px at 0% 0%, rgba(95, 176, 255, 0.18), transparent 65%),
    radial-gradient(800px 450px at 100% 100%, rgba(77, 229, 189, 0.14), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  min-height: 100vh;
}

.wrap {
  width: min(980px, 92%);
  margin: 0 auto;
  padding: 30px 0 40px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.logo {
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--accent);
  font-weight: 700;
}

.back-link {
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.02);
  transition: 0.2s ease;
}

.back-link:hover { border-color: var(--accent); }

.hero {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  background: linear-gradient(140deg, rgba(24, 32, 52, 0.9), rgba(18, 22, 36, 0.9));
  box-shadow: var(--shadow);
}

h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.05;
}

.subtitle {
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.6;
  max-width: 760px;
}

.nav-pills {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-pills a {
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  border: 1px solid var(--line);
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
}

.grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  padding: 18px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.card p, .card li {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

.highlight {
  color: var(--text);
  font-weight: 600;
}

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

.notice {
  margin-top: 14px;
  font-size: 13px;
  color: #90a2ca;
}

@media (max-width: 800px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 20px; }
}