:root {
  --bg: #0b0b0f;
  --panel: #11131b;
  --panel-2: #161925;
  --text: #f0f2ff;
  --muted: #9aa0b8;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.12);
  --danger: #ff5050;
  --danger-bg: rgba(255, 80, 80, 0.12);
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

.app {
  max-width: 520px;
  margin: 0 auto;
  padding: 16px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #0077ff);
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #fff;
  font-size: 18px;
}

h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.2px;
}

.tagline {
  font-size: 12px;
  color: var(--muted);
}

.privacy {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--panel);
}

.privacy:hover { color: var(--accent); }

.main { display: grid; gap: 16px; }

.hero {
  background: var(--panel);
  border-radius: var(--radius);
  padding: 18px;
  border: 1px solid rgba(255,255,255,0.06);
}

.hero h2 {
  margin: 0 0 8px;
  font-size: 20px;
  color: var(--accent);
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.alert {
  background: var(--danger-bg);
  border-left: 4px solid var(--danger);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 13px;
  color: #ffd6d6;
}

.alert strong { color: var(--danger); }

.cards {
  display: grid;
  gap: 12px;
}

.card {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--radius);
  padding: 16px;
  transition: transform .08s ease, border-color .08s ease;
}

.card:hover {
  border-color: rgba(0, 212, 255, 0.25);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.checklist {
  background: var(--panel-2);
  border-radius: var(--radius);
  padding: 18px;
  border: 1px solid rgba(255,255,255,0.05);
}

.checklist h3 {
  margin: 0 0 12px;
  font-size: 15px;
}

.checklist ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13px;
}

.checklist li { margin-bottom: 6px; }

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 10px 0 20px;
}

.footer a { color: var(--accent); text-decoration: none; }

@media (min-width: 640px) {
  .app { max-width: 640px; padding: 24px; }
  .cards { grid-template-columns: 1fr 1fr; }
  .hero h2 { font-size: 24px; }
}