:root {
  --bg-1: #07182f;
  --bg-2: #162b4d;
  --panel: rgba(9, 18, 36, 0.68);
  --panel-strong: rgba(13, 23, 43, 0.9);
  --card: rgba(15, 29, 58, 0.9);
  --line: rgba(255, 255, 255, 0.12);
  --text: #eef7ff;
  --muted: #b4c8de;
  --accent: #7cf7d4;
  --accent-2: #78d7ff;
  --warning: #ffcf5c;
  --danger: #ff6c8d;
  --shadow: rgba(8, 13, 27, 0.4);
  --ground: #1b8f69;
  --pipe: #5bda9a;
  --pipe-shadow: #164d44;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top, #1d386b 0%, var(--bg-1) 32%, #050d1a 100%);
  color: var(--text);
  font-family: Segoe UI, Tahoma, Geneva, Verdana, sans-serif;
  overscroll-behavior: none;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

button {
  font: inherit;
}

.page-shell {
  width: min(100%, 1100px);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

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

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #041a2e;
  font-weight: 900;
  font-size: 22px;
  box-shadow: 0 12px 24px rgba(124, 247, 212, 0.28);
}

.eyebrow {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.eyebrow.accent {
  color: var(--accent);
}

h1, h2, h3, p {
  margin: 0;
}

h1 {
  font-size: clamp(1.5rem, 2vw, 2.2rem);
}

.topbar-actions {
  display: flex;
  gap: 10px;
}

.icon-button,
.primary-button,
.secondary-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.icon-button:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
  border-color: rgba(255,255,255,0.2);
}

.icon-button {
  width: 46px;
  height: 46px;
  font-size: 1.25rem;
}

.game-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: 18px;
  align-items: start;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 42px var(--shadow);
  backdrop-filter: blur(10px);
}

.hud {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 0 4px 12px;
}

.badge {
  min-width: 120px;
  padding: 12px 16px;
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.badge.secondary {
  align-items: flex-end;
}

.label {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.badge strong {
  font-size: clamp(1.3rem, 2vw, 2rem);
}

.canvas-wrap {
  position: relative;
  width: 100%;
  border-radius: 30px;
  overflow: hidden;
  background: linear-gradient(180deg, #6ac9ff 0%, #bfe9ff 44%, #d5f5c8 44%, #9cd85e 100%);
  border: 1px solid var(--line);
  box-shadow: 0 26px 54px rgba(8, 12, 18, 0.52);
}

#gameCanvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 420 / 640;
  background: transparent;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(5, 12, 22, 0.32);
  backdrop-filter: blur(2px);
}

.overlay.visible {
  display: flex;
}

.panel {
  width: min(92%, 420px);
  padding: 22px 20px 18px;
  background: rgba(12, 20, 38, 0.84);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 26px;
  text-align: center;
}

.panel h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 10px;
}

.panel p {
  color: var(--muted);
  line-height: 1.5;
}

.player-card {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 18px 0 16px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 18px;
  border: 1px solid var(--line);
  text-align: left;
}

.avatar {
  width: 52px;
  height: 52px;
  flex: 0 0 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ffd876, #f6a8d0);
  border: 2px solid rgba(255,255,255,0.28);
  box-shadow: inset 0 0 0 6px rgba(255,255,255,0.05);
  position: relative;
  overflow: hidden;
}

.player-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.player-meta span {
  color: var(--muted);
  font-size: 0.8rem;
}

.button-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 12px;
}

.primary-button,
.secondary-button {
  padding: 0.82rem 1.3rem;
  min-width: 150px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: rgba(124,247,212,0.5);
  color: #071a2e;
  box-shadow: 0 10px 22px rgba(124,247,212,0.3);
}

.secondary-button {
  background: rgba(255,255,255,0.06);
}

.hidden {
  display: none !important;
}

.score-summary {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.score-summary > div {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.score-summary strong {
  font-size: 1.55rem;
}

.platform-status {
  margin-top: 14px;
  font-size: 0.8rem;
  min-height: 18px;
  color: var(--muted);
}

.leaderboard-panel {
  padding: 18px 16px 16px;
  background: rgba(9, 18, 36, 0.7);
}

.leaderboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.state-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.38rem 0.65rem;
  border-radius: 999px;
  background: rgba(124,247,212,0.1);
  border: 1px solid rgba(124,247,212,0.2);
  color: var(--accent);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.leaderboard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.leaderboard-list li {
  display: grid;
  grid-template-columns: 32px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid transparent;
}

.leaderboard-list li.highlight {
  background: rgba(124,247,212,0.1);
  border-color: rgba(124,247,212,0.2);
}

.leaderboard-rank {
  color: var(--muted);
  font-weight: 700;
}

.leaderboard-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-score {
  font-weight: 700;
  color: var(--warning);
}

.leaderboard-hint {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 840px) {
  body {
    padding: 16px;
  }

  .game-panel {
    grid-template-columns: 1fr;
  }

  .leaderboard-panel {
    order: 2;
  }
}

@media (max-width: 480px) {
  .topbar {
    margin-bottom: 12px;
  }

  .badge {
    min-width: 96px;
    padding: 10px 12px;
  }

  .score-summary {
    gap: 12px;
  }

  .button-row {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }
}