:root {
  --bg: #050816;
  --bg-elevated: rgba(12, 18, 32, 0.9);
  --accent: #8b5cf6;
  --accent-soft: rgba(139, 92, 246, 0.12);
  --text-main: #f9fafb;
  --text-sub: #9ca3af;
  --border-subtle: rgba(148, 163, 184, 0.25);
  --radius-lg: 18px;
  --shadow-card: 0 18px 40px rgba(15, 23, 42, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo',
    'Noto Sans KR', sans-serif;
  background: radial-gradient(circle at top, #1d2438 0, #020617 60%, #000 100%);
  color: var(--text-main);
}

a {
  color: inherit;
  text-decoration: none;
}

.hero {
  padding: 32px 16px 24px;
}

.hero-inner {
  max-width: 420px;
  margin: 0 auto;
  padding: 18px 20px 22px;
  border-radius: 32px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background:
    radial-gradient(circle at 40% 0%, rgba(79, 70, 229, 0.85) 0%, rgba(15, 23, 42, 0.4) 45%, transparent 70%),
    linear-gradient(135deg, #020617 0%, #020617 55%, #020617 100%);
  box-shadow: 0 32px 80px rgba(15, 23, 42, 0.85);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.8);
  color: rgba(209, 213, 219, 0.9);
  border: 1px solid rgba(129, 140, 248, 0.7);
}

.hero h1 {
  margin: 10px 0 4px;
  font-size: clamp(28px, 4vw, 34px);
  letter-spacing: -0.04em;
}

.hero-sub {
  margin: 4px 0 16px;
  font-size: 14px;
  color: rgba(229, 231, 235, 0.9);
}

.hero-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.hero-nav a {
  font-size: 12px;
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.75);
  color: rgba(229, 231, 235, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.6);
  transition: background 0.18s ease, transform 0.18s ease, border-color 0.18s ease;
}

.hero-nav a:hover {
  background: rgba(129, 140, 248, 0.35);
  border-color: rgba(129, 140, 248, 0.9);
  transform: translateY(-1px);
}

.page {
  max-width: 420px;
  margin: 0 auto 40px;
  padding: 0 16px 32px;
}

.section {
  margin-top: 32px;
}

.section h2 {
  font-size: 18px;
  margin: 0 0 12px;
  letter-spacing: -0.03em;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

@media (min-width: 768px) {
  .section-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .section-grid .wide {
    grid-column: 1 / -1;
  }
}

.card {
  border-radius: var(--radius-lg);
  padding: 16px 16px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

.card p {
  margin: 4px 0;
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}

.card ul,
.card ol {
  margin: 6px 0 4px 18px;
  padding: 0;
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.55;
}

.card li + li {
  margin-top: 2px;
}

.card strong {
  color: #e5e7eb;
}

.card.wide {
  border: 1px solid rgba(129, 140, 248, 0.7);
  background: radial-gradient(circle at 35% 0%, rgba(79, 70, 229, 0.45), rgba(15, 23, 42, 0.96));
}

.note {
  margin-top: 8px;
  padding: 6px 9px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.6);
  font-size: 12px;
  color: rgba(209, 213, 219, 0.95);
}

.footer {
  border-top: 1px solid rgba(31, 41, 55, 1);
  padding: 12px 16px 20px;
  text-align: center;
  font-size: 11px;
  color: rgba(148, 163, 184, 0.9);
}