:root {
  --bg: #0f1419;
  --surface: #1e2630;
  --text: #f4f7fb;
  --muted: #9aa8b8;
  --blue: #009dff;
  --border: rgba(255, 255, 255, 0.08);
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(circle at top, #17202a 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.6;
}

.container {
  width: min(720px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 4rem 0;
}

.card {
  background: rgba(30, 38, 48, 0.72);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(12px);
}

.eyebrow {
  color: var(--blue);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0.5rem 0 1rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.75rem;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--blue);
  color: #041018;
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
}

.btn:hover {
  text-decoration: none;
  filter: brightness(1.05);
}

footer {
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}