* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: system-ui, -apple-system, sans-serif;
  background: linear-gradient(160deg, #9ec9ff, #d4c8ff 55%, #ffd6e8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.hud { text-align: center; margin-bottom: 10px; }
.score-label { color: rgba(30,58,110,0.55); font-size: 12px; letter-spacing: 3px; }
.score-value {
  display: inline-block;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.1;
  background: linear-gradient(180deg, #ff2e63, #a855f7);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 1px 0 rgba(255,255,255,0.6));
}
.score-value.pop { animation: score-pop 0.18s ease-out; }
@keyframes score-pop {
  0% { transform: scale(1.3); }
  100% { transform: scale(1); }
}
.mute-btn {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 5;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.55);
  border: 1px solid rgba(255,255,255,0.85);
  border-radius: 12px;
  font-size: 19px;
  cursor: pointer;
}
.mute-btn:active { transform: scale(0.95); }
.online {
  margin-top: 3px;
  color: rgba(30,58,110,0.6);
  font-size: 13px;
  letter-spacing: 1px;
}
.online::before {
  content: '● ';
  color: #4ade80;
}
.online.hidden { visibility: hidden; }
.copyright {
  margin-top: 12px;
  color: rgba(30,58,110,0.45);
  font-size: 12px;
  letter-spacing: 1px;
}
#board {
  width: min(94vw, 480px);
  aspect-ratio: 5 / 7;
  touch-action: none;
  border-radius: 16px;
}
.overlay {
  position: fixed; inset: 0; z-index: 10;
  display: flex; align-items: center; justify-content: center;
  background: rgba(45, 55, 95, 0.35);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.overlay.hidden { display: none; }
.overlay-card {
  background: linear-gradient(170deg, #ffffff, #f3ecff);
  border: 1px solid rgba(255,255,255,0.9);
  border-radius: 20px;
  padding: 28px 44px;
  text-align: center;
  color: #2b2b4f;
  box-shadow: 0 18px 50px rgba(80, 60, 160, 0.35);
}
.overlay-card h1 {
  font-size: 26px;
  letter-spacing: 4px;
  background: linear-gradient(180deg, #ff2e63, #a855f7);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.final-score { font-size: 42px; font-weight: 700; margin: 10px 0 20px; color: #2b2b4f; }
#play-again {
  background: linear-gradient(180deg, #ff5b8a, #ff2e63);
  border: none;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 1px;
  padding: 12px 30px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(255,46,99,0.4);
}
#play-again:active { transform: scale(0.97); }

.screen { display: none; }
.screen.active { display: flex; flex-direction: column; align-items: center; justify-content: center; }
#screen-game.active { display: flex; flex-direction: column; align-items: center; justify-content: center; }
.menu-card { text-align: center; }
.menu-title {
  font-size: 40px; font-weight: 800; letter-spacing: 3px;
  background: linear-gradient(180deg, #ff2e63, #a855f7);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.menu-subtitle { color: rgba(30,58,110,0.55); font-size: 13px; letter-spacing: 4px; margin: 4px 0 28px; }
.menu-buttons { display: flex; flex-direction: column; gap: 12px; width: min(78vw, 300px); }
.menu-btn {
  background: rgba(168,85,247,0.12); border: 1.5px solid rgba(168,85,247,0.35);
  color: #7c3aed; font-weight: 700; font-size: 15px; letter-spacing: 1px;
  padding: 14px; border-radius: 14px; cursor: pointer;
}
.menu-btn--primary {
  background: linear-gradient(180deg, #ff5b8a, #ff2e63); border: none; color: #fff;
  padding: 16px; box-shadow: 0 8px 20px rgba(255,46,99,0.4);
}
.menu-btn:active { transform: scale(0.97); }
.menu-footer { margin-top: 26px; color: rgba(30,58,110,0.45); font-size: 12px; letter-spacing: 1px; }
.screen-header { display: flex; align-items: center; gap: 10px; width: min(94vw, 480px); margin-bottom: 12px; }
.screen-header h2 { color: #2b2b4f; font-size: 18px; letter-spacing: 3px; flex: 1; text-align: center; }
.back-btn {
  padding: 8px 16px; border-radius: 12px; font-size: 12px; font-weight: 700; letter-spacing: 1px;
  background: rgba(255,255,255,0.55); border: 1px solid rgba(255,255,255,0.85); color: #2b2b4f; cursor: pointer;
}
.mute-btn--left {
  left: 14px; right: auto;
  width: auto; padding: 0 14px;
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
}
.level-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px;
  width: min(94vw, 480px); overflow-y: auto;
}
.level-tile {
  aspect-ratio: 1; border-radius: 12px; border: none; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-weight: 800; font-size: 16px; color: #fff;
  background: linear-gradient(180deg, #ff5b8a, #ff2e63); box-shadow: 0 3px 8px rgba(255,46,99,0.35);
}
.level-tile .stars { font-size: 8px; letter-spacing: 1px; }
.level-tile--locked {
  background: rgba(30,58,110,0.07); color: rgba(30,58,110,0.35); box-shadow: none; cursor: default;
}
.settings-card { width: min(94vw, 480px); display: flex; flex-direction: column; gap: 10px; }
.setting-row {
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(30,58,110,0.05); border-radius: 12px; padding: 12px 14px;
  color: #2b2b4f; font-size: 13px; font-weight: 600;
}
.setting-row input[type="text"] {
  width: 140px; padding: 6px 10px; border-radius: 8px; border: 1.5px solid rgba(168,85,247,0.35);
  font-size: 13px; color: #2b2b4f; text-align: right;
}
.setting-row input[type="range"] { accent-color: #a855f7; width: 140px; }
.setting-row input[type="checkbox"] { width: 22px; height: 22px; accent-color: #a855f7; }
.setting-reset {
  background: rgba(255,46,99,0.08); border: none; color: #ff2e63; font-weight: 700;
  font-size: 13px; padding: 12px; border-radius: 12px; cursor: pointer;
}
.leaderboard-tabs { display: flex; gap: 8px; margin-bottom: 10px; }
.lb-tab {
  padding: 8px 18px; border-radius: 10px; border: 1.5px solid rgba(168,85,247,0.35);
  background: rgba(168,85,247,0.12); color: #7c3aed; font-weight: 700; font-size: 12px; letter-spacing: 1px; cursor: pointer;
}
.lb-tab--active { background: linear-gradient(180deg, #ff5b8a, #ff2e63); border: none; color: #fff; }
.lb-list { width: min(94vw, 480px); list-style: none; display: flex; flex-direction: column; gap: 6px; }
.lb-list li {
  display: flex; justify-content: space-between; padding: 10px 14px; border-radius: 10px;
  background: rgba(30,58,110,0.05); color: #2b2b4f; font-size: 14px; font-weight: 600;
}
.lb-list .lb-rank { color: rgba(30,58,110,0.45); width: 28px; }
.lb-status { color: rgba(30,58,110,0.55); font-size: 13px; margin-bottom: 8px; }
.leaderboard-entry { margin: 12px 0; display: flex; flex-direction: column; gap: 8px; }
.leaderboard-entry.hidden { display: none; }
.lb-name-input {
  padding: 8px 12px; border-radius: 8px; border: 1.5px solid rgba(168,85,247,0.35);
  font-size: 14px; text-align: center; color: #2b2b4f;
}
.lb-submit-btn {
  background: linear-gradient(180deg, #ff5b8a, #ff2e63); border: none; color: #fff; font-weight: 700;
  font-size: 13px; padding: 10px; border-radius: 10px; cursor: pointer;
}
.lb-result { color: #7c3aed; font-size: 13px; font-weight: 700; text-align: center; }
.challenge-hud { display: flex; gap: 16px; justify-content: center; margin-top: 4px; }
.challenge-stat { color: #2b2b4f; font-size: 12px; font-weight: 700; letter-spacing: 1px; }
.challenge-hud.hidden { display: none; }