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

:root {
  --bg: #0a0e1a;
  --surface: #141b2d;
  --text: #e8ecf4;
  --muted: #8b95a8;
  --accent: #6366f1;
  --accent-glow: #818cf8;
  --star: #fbbf24;
}

html,
body {
  margin: 0;
  min-height: 100dvh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

body {
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.25), transparent),
    radial-gradient(circle at 20% 80%, rgba(251, 191, 36, 0.08), transparent 40%),
    var(--bg);
}

.stars {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255, 255, 255, 0.6), transparent),
    radial-gradient(1px 1px at 30% 70%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1px 1px at 70% 30%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 90% 60%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 50% 50%, rgba(255, 255, 255, 0.35), transparent);
  opacity: 0.8;
}

.page {
  position: relative;
  z-index: 1;
  max-width: 420px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.logo {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  margin: 0 0 0.25rem;
  background: linear-gradient(135deg, var(--accent-glow), var(--star));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-left-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 0 auto 1.25rem;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loader-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.fallback-ui {
  margin-top: 1.5rem;
}

.fallback-ui[hidden] {
  display: none;
}

.fallback-ui p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.85rem 1.5rem;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #4f46e5);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.btn:active {
  transform: scale(0.98);
}

.card {
  width: 100%;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 1.5rem;
  margin-top: 1.5rem;
  text-align: left;
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.install-banner {
  display: none;
  width: 100%;
  margin-top: 1.5rem;
  padding: 1rem;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 12px;
}

.install-banner.visible {
  display: block;
}

.install-banner p {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
}

.status {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.status.ok {
  color: #34d399;
}