:root {
  --bg: #2B2F36;
  --card: #1F2329;
  --display: #4446C9;
  --primary: #F28C28;
  --secondary: #3A8DDE;
  --text: #FFFFFF;
  --muted: #C8CCD2;
  --border: #1C1F24;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at top, rgba(68, 70, 201, 0.35), transparent 35%), var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.site-header {
  border-bottom: 4px solid var(--border);
  background: rgba(31, 35, 41, 0.92);
  position: sticky;
  top: 0;
  backdrop-filter: blur(12px);
  z-index: 10;
}

.nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.nav-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--primary);
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 44px 20px 64px;
}

.hero {
  background: var(--card);
  border: 4px solid var(--border);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.25);
  padding: 34px;
  margin-bottom: 28px;
}

.card {
  background: rgba(31, 35, 41, 0.94);
  border: 3px solid var(--border);
  padding: 26px;
  margin: 18px 0;
}

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

h1 {
  font-size: clamp(32px, 6vw, 54px);
  margin-bottom: 12px;
}

h2 {
  font-size: 24px;
  color: var(--primary);
  margin-top: 30px;
}

p, li {
  color: var(--muted);
}

strong {
  color: var(--text);
}

.badge {
  display: inline-block;
  color: var(--card);
  background: var(--primary);
  font-weight: 800;
  padding: 6px 10px;
  margin-bottom: 14px;
  border: 2px solid var(--text);
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.button {
  display: inline-block;
  color: var(--card);
  background: var(--primary);
  text-decoration: none;
  font-weight: 800;
  padding: 12px 16px;
  border: 2px solid var(--text);
}

.button.secondary {
  color: var(--text);
  background: var(--display);
}

.notice {
  border-left: 6px solid var(--primary);
  padding: 14px 18px;
  background: rgba(242, 140, 40, 0.08);
  color: var(--text);
}

.footer {
  border-top: 4px solid var(--border);
  background: var(--card);
  padding: 24px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

code {
  background: rgba(255,255,255,0.08);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .card {
    padding: 22px;
  }
}