:root{
  --bg: #101010;
  --panel: #1c1c1c;
  --panel-2: #262626;
  --border: #333333;
  --ink: #f5f5f5;
  --ink-dim: #9a9a9a;
  --accent: #f6c9b1;
  --accent-2: #d6a07a;
  --accent-3: #e6b9a0;
  --danger: #e05252;
  --radius: 14px;
  --radius-sm: 8px;
  --font-head: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
}

*{ box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  overflow: hidden;
}

body{
  display: flex;
  align-items: center;
  justify-content: center;
}

.app{
  width: 100%;
  height: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  padding: 14px 14px 10px;
}

.topbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 2px 14px;
}

.brand{
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-mark{
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  position: relative;
  flex: none;
}
.brand-mark::after{
  content: "";
  position: absolute;
  left: 50%; top: 55%;
  width: 9px; height: 9px;
  transform: translate(-50%, -50%);
  background: var(--accent);
  clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
}

.brand-text{
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.brand-text b{ color: var(--ink); font-weight: 800; }

.icon-btn{
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--ink-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color .15s ease, border-color .15s ease;
}
.icon-btn:hover{ color: var(--accent); border-color: var(--accent-2); }
.icon-btn.muted #wave1, .icon-btn.muted #wave2{ display: none; }

.game-wrap{
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: 0 20px 50px rgba(0,0,0,.45);
}

#game{
  height: 100%;
  max-height: 100%;
  width: auto;
  max-width: 100%;
  display: block;
  touch-action: manipulation;
  cursor: pointer;
}

.hud{
  position: absolute;
  top: 18px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

.score{
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 44px;
  color: var(--ink);
  text-shadow: 0 2px 0 rgba(0,0,0,.5), 0 0 24px rgba(0,0,0,.35);
  letter-spacing: .02em;
}

.overlay[hidden]{
  display: none;
}

.overlay{
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px 26px;
  background: linear-gradient(180deg, rgba(16,16,16,.55), rgba(16,16,16,.85) 55%, rgba(16,16,16,.96));
  backdrop-filter: blur(2px);
  overflow-y: auto;
  gap: 4px;
}

.eyebrow{
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}
.eyebrow-danger{ color: var(--danger); }

.title{
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 44px;
  line-height: 0.98;
  letter-spacing: .01em;
  text-transform: uppercase;
  margin: 0 0 14px;
  color: var(--ink);
}
.title span{
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.title-sm{ font-size: 38px; }

.subtitle{
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-dim);
  max-width: 300px;
  margin: 0 0 26px;
}

.btn{
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 14px 40px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, filter .12s ease;
}
.btn:active{ transform: translateY(1px) scale(.98); }

.btn-primary{
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #201510;
  box-shadow: 0 10px 24px rgba(246,201,177,.18);
}
.btn-primary:hover{ filter: brightness(1.06); }

.btn-ghost{
  background: transparent;
  color: var(--ink-dim);
  border: 1px solid var(--border);
  padding: 12px 32px;
  margin-top: 4px;
}
.btn-ghost:hover{ color: var(--ink); border-color: var(--accent-2); }

.hint{
  margin-top: 18px;
  font-size: 12px;
  color: var(--ink-dim);
}
.hint kbd{
  font-family: var(--font-body);
  font-size: 11px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--ink);
}

.score-panel{
  width: 100%;
  max-width: 260px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 8px;
}
.score-row{
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 8px 0;
  font-family: var(--font-head);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-dim);
}
.score-row strong{
  font-size: 22px;
  color: var(--ink);
  letter-spacing: 0;
}
.score-row-best{
  border-top: 1px solid var(--border);
}
.score-row-best strong{ color: var(--accent); }

.record-badge{
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #201510;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  padding: 6px 14px;
  border-radius: 999px;
  margin: 14px 0 6px;
}

.submit-row{
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 320px;
  margin: 10px 0 2px;
}
.submit-row input{
  flex: 1;
  min-width: 0;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--ink);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 14px;
}
.submit-row input:focus{ outline: none; border-color: var(--accent-2); }
.submit-row .btn{ padding: 10px 20px; font-size: 13px; }

.submit-status{
  font-size: 12px;
  color: var(--ink-dim);
  margin: 0 0 6px;
  min-height: 14px;
}
.submit-status.is-ok{ color: var(--accent); }
.submit-status.is-error{ color: var(--danger); }

.leaderboard{
  width: 100%;
  max-width: 340px;
  list-style: none;
  margin: 4px 0 18px;
  padding: 0;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  max-height: 40vh;
  overflow-y: auto;
}
.leaderboard li{
  display: grid;
  grid-template-columns: 28px 1fr auto auto;
  gap: 10px;
  align-items: baseline;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  text-align: left;
}
.leaderboard li:last-child{ border-bottom: none; }
.leaderboard .lb-rank{
  font-family: var(--font-head);
  font-weight: 800;
  color: var(--ink-dim);
}
.leaderboard li:nth-child(1) .lb-rank,
.leaderboard li:nth-child(2) .lb-rank,
.leaderboard li:nth-child(3) .lb-rank{ color: var(--accent); }
.leaderboard .lb-name{
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.leaderboard .lb-score{
  font-family: var(--font-head);
  font-weight: 800;
  color: var(--ink);
}
.leaderboard .lb-flaps{
  font-size: 11px;
  color: var(--ink-dim);
  white-space: nowrap;
}
.leaderboard-empty{
  font-size: 13px;
  color: var(--ink-dim);
  margin: 4px 0 18px;
}

.footer{
  text-align: center;
  font-size: 11px;
  color: var(--ink-dim);
  padding-top: 10px;
  letter-spacing: .02em;
}
.footer strong{ color: var(--ink); }

@media (max-height: 640px){
  .title{ font-size: 34px; }
  .subtitle{ margin-bottom: 18px; }
  .btn{ padding: 12px 32px; }
}