:root {
  --bg-0: #050710;
  --bg-1: #0a1330;
  --bg-2: #111f45;
  --ink: #edf4ff;
  --muted: #9cb5d6;
  --accent: #54e8ff;
  --accent-2: #98ff7a;
  --line: rgba(84, 232, 255, 0.28);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  min-height: 100vh;
  color: var(--ink);
  font-family: 'Space Mono', monospace;
  background:
    radial-gradient(circle at 20% 20%, rgba(84, 232, 255, 0.18), transparent 35%),
    radial-gradient(circle at 80% 10%, rgba(152, 255, 122, 0.16), transparent 28%),
    linear-gradient(155deg, var(--bg-0), var(--bg-1) 48%, var(--bg-2));
}
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}
.hero {
  border: 1px solid var(--line);
  background: rgba(5, 12, 32, 0.75);
  backdrop-filter: blur(4px);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 18px 60px rgba(2, 7, 26, 0.5);
}
.title {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  letter-spacing: 1px;
}
.title span { color: var(--accent); }
.subtitle {
  margin-top: 10px;
  color: var(--muted);
  max-width: 70ch;
  line-height: 1.6;
}
.actions {
  margin-top: 22px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--line);
  font-family: 'Orbitron', sans-serif;
  color: var(--ink);
}
.btn.primary {
  background: linear-gradient(90deg, #0f7ea7, #2db0d3);
  border-color: #3dd2f8;
}
.btn.secondary {
  background: rgba(10, 25, 55, 0.75);
}
.grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  background: rgba(8, 18, 45, 0.72);
}
.card h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.92rem;
  margin-bottom: 8px;
  color: var(--accent-2);
}
.card p, .tips li {
  color: var(--muted);
  line-height: 1.55;
  font-size: 0.94rem;
}
.tips {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  background: rgba(9, 21, 49, 0.75);
}
.tips h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem;
  margin-bottom: 8px;
}
.tips ul { padding-left: 18px; display: grid; gap: 6px; }
footer {
  margin-top: 24px;
  color: #7896be;
  font-size: 0.8rem;
  text-align: center;
}
@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
}