:root{
  --bg:#050814;
  --panel:#0b1224;
  --panel2:#0a1020;
  --txt:#e5e7eb;
  --muted:#a3aab8;
  --bd:rgba(255,255,255,.10);
  --bd2:rgba(255,255,255,.16);

  --btn:#111a32;
  --btn2:#0f1830;
  --btnBd:rgba(255,255,255,.16);

  --ok:rgba(34,197,94,.85);
  --bad:rgba(148,163,184,.55);

  --kbWhite:#f8fafc;
  --kbWhiteTxt:#0b1224;
  --kbBlack:#0b1020;

  --cursor:rgba(56,189,248,.95);

  --kbH:150px;
  --kbHMobile:120px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; margin:0; }
body{
  background: radial-gradient(1200px 800px at 50% 0%, rgba(59,130,246,.14), transparent 60%),
              radial-gradient(900px 600px at 20% 90%, rgba(168,85,247,.10), transparent 55%),
              var(--bg);
  color:var(--txt);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

#app{
  min-height:100%;
  display:flex;
  flex-direction:column;
}

/* Topbar */
.topbar{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px;
  padding:14px 14px 10px;
  border-bottom:1px solid var(--bd);
  background: linear-gradient(to bottom, rgba(255,255,255,.04), transparent);
}

.brand .title{
  font-weight:900;
  letter-spacing:.2px;
  font-size:18px;
}
.brand .subtitle{
  margin-top:2px;
  font-size:12.5px;
  color:var(--muted);
}

.controls{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
  justify-content:flex-end;
}

.sep{
  width:1px;
  height:28px;
  background:var(--bd);
  margin:0 4px;
}

.btn{
  appearance:none;
  border:1px solid var(--btnBd);
  background: linear-gradient(to bottom, rgba(255,255,255,.06), transparent 65%), var(--btn);
  color:var(--txt);
  padding:8px 10px;
  border-radius:12px;
  cursor:pointer;
  font-weight:700;
  font-size:13px;
}
.btn:hover{ border-color:var(--bd2); }
.btn:active{ transform: translateY(1px); }
.btn.primary{
  background: linear-gradient(to bottom, rgba(56,189,248,.18), rgba(56,189,248,.06)), var(--btn2);
  border-color: rgba(56,189,248,.35);
}

/* Layout main */
.main{
  flex:1 1 auto;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:12px 12px 14px;
}

.hud{
  display:grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap:10px;
  align-items:stretch;
}

.scoreBox, .centerBox{
  background: linear-gradient(to bottom, rgba(255,255,255,.05), transparent 55%), var(--panel);
  border:1px solid var(--bd);
  border-radius:16px;
  padding:10px 12px;
  box-shadow: 0 10px 24px rgba(0,0,0,.22);
}

.scoreBox .who{
  font-weight:900;
  margin-bottom:2px;
}
.scoreBox .keysHint{display: inline-block;
  background: rgba(56,189,248,.15);
  border: 1px solid rgba(56,189,248,.35);
  color: rgba(56,189,248,.95);
  font-weight: 900;
  border-radius: 6px;
  padding: 0px 6px;
  font-size: 13px;
}
.scoreLine{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  border-top:1px dashed rgba(255,255,255,.10);
  padding-top:8px;
  margin-top:8px;
}
.scoreLine.small{
  font-size:13px;
  color:var(--muted);
}
.scoreLine .value{
  font-variant-numeric: tabular-nums;
  font-weight:900;
  font-size:18px;
}
.scoreLine.small .value{
  font-size:14px;
  font-weight:800;
}

.centerBox{
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  gap:10px;
  background: linear-gradient(to bottom, rgba(56,189,248,.10), transparent 60%), var(--panel2);
}

.chordLabel{
  color:var(--muted);
  font-size:12px;
}
.chordName{
  font-size:38px;
  font-weight:950;
  line-height:1.05;
  letter-spacing:.2px;
  margin-top:2px;
  text-align:center;
  font-variant-numeric: tabular-nums;
}

.timerWrap{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.timerText{
  display:flex;
  justify-content:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
}
.timerText #timeLeft, .timerText #beatsLeft{
  color:var(--txt);
  font-weight:900;
  font-variant-numeric: tabular-nums;
}
.timerText .muted{ color:var(--muted); }

.bar{
  height:10px;
  background: rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.10);
  border-radius:999px;
  overflow:hidden;
}
.barFill{
  height:100%;
  background: linear-gradient(to right, rgba(56,189,248,.95), rgba(168,85,247,.85));
  width:0%;
  transition: width 80ms linear;
}

.meta{
  display:flex;
  justify-content:space-between;
  gap:8px;
  color:var(--muted);
  font-size:12.5px;
}

/* Keyboards */
.kbArea{
  background: linear-gradient(to bottom, rgba(255,255,255,.04), transparent 60%), rgba(0,0,0,.10);
  border:1px solid var(--bd);
  border-radius:16px;
  padding:10px 10px 12px;
  box-shadow: 0 10px 24px rgba(0,0,0,.18);
  position: relative;
}

.kbTitle{
  font-size:12.5px;
  color:var(--muted);
  margin-bottom:8px;
}

.keyboard{
  position:relative;
  width:100%;
  height: var(--kbH);
  border-radius:14px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
  overflow:hidden;
  touch-action: none;
}

.key{
  position:absolute;
  top:0; /* alignement haut touches noires/blanches */
  border:1px solid rgba(0,0,0,.25);
  border-radius:0 0 10px 10px;
  display:flex;
  align-items:flex-end;
  justify-content:center;
  user-select:none;
}

.key.white{
  background: linear-gradient(to bottom, rgba(255,255,255,1), rgba(255,255,255,.94));
  color: var(--kbWhiteTxt);
  z-index:1;
}
.key.black{
  background: linear-gradient(to bottom, rgba(10,15,35,1), rgba(10,15,35,.94));
  color: rgba(255,255,255,.86);
  z-index:3;
  border-color: rgba(0,0,0,.55);
}

.key .label{
  font-size:12px;
  font-weight:850;
  padding-bottom:8px;
  opacity:.95;
}

.hideKeyLabels .key.white .label{ display:none; }

.key.cursor{
  outline: 3px solid var(--cursor);
  outline-offset: -3px;
  box-shadow: 0 0 0 3px rgba(56,189,248,.22) inset;
}
.key.cursor::before{
  content:"";
  position:absolute;
  top:-10px;
  left:50%;
  transform:translateX(-50%);
  width:0;
  height:0;
  border-left:8px solid transparent;
  border-right:8px solid transparent;
  border-bottom:10px solid rgba(56,189,248,.95);
  filter: drop-shadow(0 2px 0 rgba(0,0,0,.25));
}

.key.validOk{
  background: linear-gradient(to bottom, rgba(34,197,94,.95), rgba(34,197,94,.70)) !important;
  color:#05110a !important;
}
.key.validBad{
  background: linear-gradient(to bottom, rgba(148,163,184,.70), rgba(148,163,184,.48)) !important;
  color: rgba(0,0,0,.65) !important;
}

.key.black.validOk{
  color:#04110b !important;
}
.key.black.validBad{
  color: rgba(0,0,0,.70) !important;
}

/* ---------------------------------------------------------
   Touch controls (overlay)
   - Joueur droite : à droite, surimpression du clavier du dessus
   - Joueur gauche : à gauche, surimpression du clavier du dessous
   CONTRAINTE : le BAS des boutons du joueur droite = le HAUT des boutons du joueur gauche
   --------------------------------------------------------- */

.touchControls{
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index: 40;

  /* Variables de géométrie des boutons */
  --touchBtnW: 72px;
  --touchBtnH: 64px;
  --touchGap: 10px;

  /* marge bas + safe area */
  --touchBottomInset: calc(14px + env(safe-area-inset-bottom));

  /* hauteur d’une pile de 2 boutons (colonne) */
  --touchStackH: calc((var(--touchBtnH) * 2) + var(--touchGap));
}

.touchRow .touchLabel{
  display:none;
}

/* Boutons tactiles (base) */
.touchBtn{
  pointer-events:auto;
  width: var(--touchBtnW);
  height: var(--touchBtnH);
  border-radius:16px;
  border:1px solid rgba(255,255,255,.18);
  background: rgba(10,15,35,.55);
  color:rgba(255,255,255,.95);
  font-size:22px;
  font-weight:950;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.touchBtn:active{ transform: translateY(1px); }

/* Joueur gauche (clavier du dessous) */
.touchRow.bottomRow{
  position:absolute;
  bottom: var(--touchBottomInset);
  left: 14px;
  right: auto;

  display:flex;
  flex-direction:column;
  gap: var(--touchGap);
  align-items:flex-start;
  pointer-events:none;
}

/* Joueur droite (clavier du dessus)
   On place la rangée en utilisant BOTTOM, de sorte que :
   - le bas de cette pile = le haut de la pile du joueur gauche
   Or le haut de la pile gauche est à : bottomInset + stackH
   Donc bottom(topRow) = bottomInset + stackH
*/
.touchRow.topRow{
  position:absolute;
  bottom: calc(var(--touchBottomInset) + var(--touchStackH));
  right: 14px;
  left: auto;

  display:flex;
  flex-direction:column;
  gap: var(--touchGap);
  align-items:flex-end;
  pointer-events:none;
}

/* Joueur droite : transparence maximale MAIS visible */
.touchRow.topRow .touchBtn{
  background: rgba(10,15,35,.10);
  border-color: rgba(255,255,255,.28);
  color: rgba(255,255,255,.92);
  box-shadow: 0 10px 22px rgba(0,0,0,.22);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-weight:900;
}

.hidden{ display:none !important; }

/* Overlay */
.overlay{
  position:fixed;
  inset:0;
  background: rgba(0,0,0,.55);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:14px;
  z-index:50;
}
.panel{
  width:min(640px, 100%);
  background: linear-gradient(to bottom, rgba(255,255,255,.06), transparent 55%), rgba(10,15,35,.92);
  border:1px solid rgba(255,255,255,.14);
  border-radius:18px;
  padding:14px 14px 12px;
  box-shadow: 0 18px 50px rgba(0,0,0,.35);
}
.panelTitle{
  font-size:18px;
  font-weight:950;
}
.panelText{
  margin-top:8px;
  color:rgba(255,255,255,.86);
  line-height:1.35;
}
.panelList{
  margin-top:10px;
  background: rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);
  border-radius:14px;
  padding:10px 10px;
}
.panelList .item{
  padding:6px 4px;
  border-top:1px dashed rgba(255,255,255,.10);
}
.panelList .item:first-child{ border-top:0; }
.panelActions{
  margin-top:12px;
  display:flex;
  justify-content:flex-end;
}

/* Toast */
.toast{
  position:fixed;
  left:50%;
  transform:translateX(-50%);
  bottom: 86px;
  background: rgba(0,0,0,.62);
  border:1px solid rgba(255,255,255,.16);
  color:rgba(255,255,255,.92);
  padding:10px 12px;
  border-radius:14px;
  z-index:60;
  max-width:min(720px, calc(100% - 28px));
  box-shadow: 0 14px 36px rgba(0,0,0,.35);
}


/* ============================================================
   Mode d'emploi d'accueil
   ============================================================ */

.welcomePanel{
  width: min(520px, 100%);
  padding: 18px 18px 14px;
}

.welcomeTitle{
  font-size: 17px;
  font-weight: 950;
  margin-bottom: 14px;
  letter-spacing: .2px;
}

.wGrid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.wCard{
  display: flex;
  align-items: flex-start;
  gap: 9px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 12px;
  padding: 9px 11px;
  font-size: 13px;
  line-height: 1.4;
  color: rgba(255,255,255,.82);
}

.wCardIcon{
  font-size: 20px;
  flex-shrink: 0;
  margin-top: 1px;
}

.wChordEx{
  display: inline-block;
  background: rgba(56,189,248,.15);
  border: 1px solid rgba(56,189,248,.35);
  color: rgba(56,189,248,.95);
  font-weight: 900;
  border-radius: 6px;
  padding: 0px 6px;
  font-size: 13px;
}

kbd{
  display: inline-block;
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 6px;
  padding: 1px 7px;
  font-family: monospace;
  font-weight: 900;
  font-size: 13px;
  color: rgba(255,255,255,.95);
  box-shadow: 0 2px 0 rgba(0,0,0,.45);
}

.welcomeActions{
  margin-top: 14px;
  display: flex;
  justify-content: flex-end;
}

.wBtnNext{
  padding: 10px 22px;
  font-size: 14px;
}

@media (max-width: 500px){
  .wGrid{ grid-template-columns: 1fr; }
}

/* Responsive */
@media (max-width: 980px){
  .hud{ grid-template-columns: 1fr; }
  .chordName{ font-size:34px; }
  .sep{ display:none; }
}

@media (max-width: 740px){
  :root{ --kbH: var(--kbHMobile); }
  .brand .subtitle{ display:none; }
  .controls{ gap:6px; }
  .touchControls{ display:block; }
}