*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --accent: #2f81f7;
  --accent-hover: #388bfd;
  --text: #e6edf3;
  --muted: #8b949e;
  --radius: 12px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Nav ── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  z-index: 100;
}

.nav-brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.nav-links { display: flex; gap: 24px; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 96px 24px 72px;
  max-width: 680px;
  margin: 0 auto;
}

.hero-icon { font-size: 4rem; margin-bottom: 16px; }

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #e6edf3 0%, #8b949e 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.tagline {
  font-size: 1.15rem;
  color: var(--muted);
  margin-bottom: 36px;
}

.cta-button {
  display: inline-block;
  padding: 14px 32px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s, transform 0.1s;
}
.cta-button:hover { background: var(--accent-hover); transform: translateY(-1px); }

/* ── Features ── */
.features {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.15s;
}
.feature-card:hover { border-color: #484f58; }

.feature-icon { font-size: 1.8rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; color: var(--muted); }

/* ── Info sections ── */
.info-section {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px;
  border-top: 1px solid var(--border);
}

.info-section.alt { background: transparent; }

.info-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.info-section p { color: var(--muted); margin-bottom: 12px; }
.info-section p:last-child { margin-bottom: 0; }

.info-section code {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.85em;
  font-family: "SF Mono", ui-monospace, monospace;
}

.requirements-list {
  list-style: none;
  color: var(--muted);
}
.requirements-list li {
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}
.requirements-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ── Legal pages ── */
.page-header {
  text-align: center;
  padding: 72px 24px 48px;
  border-bottom: 1px solid var(--border);
}
.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.page-header .updated { font-size: 0.85rem; color: var(--muted); }

.legal-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.legal-content h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 36px 0 10px;
  color: var(--text);
}
.legal-content h2:first-child { margin-top: 0; }

.legal-content p, .legal-content li {
  color: var(--muted);
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.legal-content ul, .legal-content ol {
  padding-left: 20px;
}

.legal-content a { color: var(--accent); text-decoration: none; }
.legal-content a:hover { text-decoration: underline; }

/* ── Footer ── */
footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); }

/* ── Responsive ── */
@media (max-width: 600px) {
  .nav { padding: 14px 20px; }
  .hero { padding: 64px 20px 48px; }
  .features, .info-section, .legal-content { padding-left: 20px; padding-right: 20px; }
}