:root {
  --bg: #0a0f1d;
  --surface: #161f36;
  --surface-2: #1b2643;
  --text: #e9eefb;
  --muted: #b2bde0;
  --accent: #4e8dff;
  --accent-2: #8b5cf6;
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

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

body {
  font-family: Inter, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 80% 0%, rgba(78, 141, 255, 0.16), transparent 40%),
    radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.18), transparent 35%),
    var(--bg);
  line-height: 1.7;
}

.container {
  width: min(920px, 92%);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(10, 15, 29, 0.76);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.brand {
  font-family: Poppins, sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

.brand span {
  color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 0.72rem 1.05rem;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
}

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.hero {
  padding: 4rem 0 1.2rem;
}

.kicker {
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 700;
}

h1,
h2,
h3 {
  font-family: Poppins, sans-serif;
  line-height: 1.2;
}

h1 {
  margin-top: 0.8rem;
  font-size: clamp(2rem, 3.6vw, 2.8rem);
}

.meta {
  margin-top: 0.95rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.content {
  padding: 1rem 0 3rem;
}

.content h2 {
  margin: 1.7rem 0 0.75rem;
  font-size: clamp(1.3rem, 2.8vw, 1.9rem);
}

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

.content ul {
  margin-top: 0.5rem;
  list-style: none;
}

.content li {
  margin: 0.5rem 0;
}

.content li i {
  color: var(--accent);
  margin-right: 0.45rem;
}

.note {
  margin-top: 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
}

.bottom-nav {
  margin: 2rem 0 3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

@media (max-width: 760px) {
  .topbar-inner {
    min-height: 64px;
  }
}