:root {
  --sky-top: #0b1030;
  --sky-mid: #1a2150;
  --sky-low: #2c3a75;
  --ink: rgba(255, 255, 255, 0.92);
  --ink-soft: rgba(255, 255, 255, 0.66);
  --ink-faint: rgba(255, 255, 255, 0.42);
  --glass: rgba(255, 255, 255, 0.07);
  --glass-edge: rgba(255, 255, 255, 0.14);
}

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

body {
  font-family: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 55%, var(--sky-low) 100%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.bubble {
  width: 88px;
  height: 88px;
  margin: 24px auto 8px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 30%, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.06) 42%),
    radial-gradient(circle at 68% 72%, rgba(140, 180, 255, 0.35), transparent 55%),
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.02) 70%);
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow: 0 0 40px rgba(150, 180, 255, 0.25), inset 0 0 24px rgba(255, 255, 255, 0.08);
  animation: breathe 6s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); }
  45% { transform: scale(1.12); }
  60% { transform: scale(1.12); }
}

@media (prefers-reduced-motion: reduce) {
  .bubble { animation: none; }
}

header {
  text-align: center;
  margin-bottom: 40px;
}

h1 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.tagline {
  color: var(--ink-soft);
  font-size: 16px;
  font-weight: 300;
  margin-top: 6px;
}

.card {
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  border-radius: 20px;
  padding: 28px;
  backdrop-filter: blur(12px);
  margin-bottom: 20px;
}

h2 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
}

.card + .card h2 {
  margin-top: 0;
}

p {
  color: var(--ink-soft);
  margin-bottom: 12px;
}

p:last-child {
  margin-bottom: 0;
}

ul {
  color: var(--ink-soft);
  padding-left: 22px;
  margin-bottom: 12px;
}

li {
  margin-bottom: 6px;
}

a {
  color: #a8c4ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.updated {
  color: var(--ink-faint);
  font-size: 13px;
  text-align: center;
  margin-bottom: 28px;
}

nav.footer {
  display: flex;
  justify-content: center;
  gap: 22px;
  margin-top: 44px;
  font-size: 14px;
  color: var(--ink-faint);
}

nav.footer a {
  color: var(--ink-faint);
}

.store-link {
  display: inline-block;
  margin-top: 20px;
  padding: 13px 28px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  color: var(--ink);
  font-weight: 600;
  font-size: 15px;
}

.store-link:hover {
  background: rgba(255, 255, 255, 0.12);
  text-decoration: none;
}