:root {
  --bg: #060916;
  --card: rgba(18, 28, 56, 0.68);
  --line: rgba(255, 255, 255, 0.12);
  --text: #eff5ff;
  --muted: #9cb0d5;
  --accent: linear-gradient(135deg, #66c4ff 0%, #8b6bff 60%, #ff5fcf 100%);
  --danger: linear-gradient(135deg, #ff7d8e, #ff4a4a);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { min-height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(89, 145, 255, 0.25), transparent 70%),
    radial-gradient(900px 420px at 110% 0%, rgba(255, 94, 201, 0.22), transparent 70%),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 45%, rgba(81, 160, 255, 0.08), transparent 45%);
}

.app {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  position: relative;
  z-index: 1;
}

.hero {
  text-align: center;
  margin-bottom: 12px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 48px);
  letter-spacing: 0.4px;
}
.hero p { margin: 8px 0 0; color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
  border-radius: 18px;
  padding: 14px;
  box-shadow: 0 20px 44px rgba(2, 9, 24, 0.35);
}

.auth { max-width: 460px; margin: 0 auto; }
label { display: block; font-size: 14px; color: var(--muted); }
input {
  width: 100%;
  margin-top: 8px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(9, 15, 31, 0.75);
  color: var(--text);
  border-radius: 14px;
  padding: 13px 14px;
  font-size: 16px;
}

button {
  width: 100%;
  border: none;
  color: white;
  font-weight: 700;
  border-radius: 14px;
  padding: 12px;
  margin-top: 10px;
  cursor: pointer;
  background: var(--accent);
  transition: transform .12s ease, filter .12s ease;
}
button:hover { filter: brightness(1.06); }
button:active { transform: translateY(1px) scale(0.99); }
button:disabled { opacity: .55; cursor: not-allowed; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
@media (min-width: 760px) {
  .stats-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.stat span {
  color: var(--muted);
  font-size: 12px;
}
.stat strong {
  margin-top: 6px;
  display: block;
  font-size: 22px;
}

.tap-wrap {
  margin: 22px 0 8px;
  text-align: center;
}

.rocket-btn {
  width: auto;
  margin: 0 auto;
  display: grid;
  place-items: center;
  padding: 0;
  background: transparent;
  box-shadow: none;
  border: 0;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}
.rocket-btn:focus,
.rocket-btn:focus-visible {
  outline: none;
  box-shadow: none;
}
.rocket-btn.tap-hit { transform: scale(0.92); }
.rocket {
  font-size: clamp(140px, 34vw, 260px);
  line-height: 1;
  filter: drop-shadow(0 12px 22px rgba(0,0,0,.35));
  animation: rocketFloat 2.2s infinite ease-in-out;
  user-select: none;
  -webkit-user-select: none;
  pointer-events: none;
}

@keyframes rocketFloat {
  0%,100% { transform: translateY(-2px) rotate(-3deg); }
  50% { transform: translateY(4px) rotate(3deg); }
}

.upgrades, .referral, .leaderboards { margin-top: 12px; }
h2 { margin: 2px 0 8px; font-size: 18px; }
.upgrade-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.up-item {
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  padding: 10px;
  background: rgba(9, 15, 31, 0.45);
}
.up-item .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.up-item .name {
  font-weight: 700;
}
.up-item .desc {
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}
.up-item button {
  margin-top: 8px;
}
code {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 8px;
  padding: 2px 8px;
}

.leaderboards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 860px) {
  .leaderboards { grid-template-columns: 1fr 1fr; }
}

.board ol {
  margin: 6px 0 0;
  padding-left: 20px;
}
.board li {
  margin: 7px 0;
  color: #dce8ff;
}
.board .meta {
  color: var(--muted);
  font-size: 13px;
}

.toast, .hint {
  color: var(--muted);
  font-size: 14px;
  min-height: 20px;
}

.danger { background: var(--danger); }
.hidden { display: none; }