*{ box-sizing:border-box; }
html,body{ height:100%; margin:0; }

body{
  font-family: system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:#020617;
  color:#e5e7eb;
  overflow-x:hidden;
}

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

.topbar{
  padding:12px 14px;
  border-bottom:1px solid rgba(255,255,255,.08);
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:10px;
  flex-wrap:wrap;
}

.brand .title{
  font-size:18px;
  font-weight:900;
  letter-spacing:.2px;
}
.brand .subtitle{
  opacity:.85;
  font-size:12.5px;
  margin-top:3px;
}

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

.btn{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.18);
  color:#e5e7eb;
  padding:10px 12px;
  border-radius:12px;
  cursor:pointer;
  font-weight:700;
  transition:transform .05s ease, background .15s ease, border-color .15s ease;
  user-select:none;
}
.btn:hover{
  background:rgba(255,255,255,.09);
  border-color:rgba(255,255,255,.26);
}
.btn:active{ transform:translateY(1px); }
.btn:disabled{ opacity:.55; cursor:not-allowed; }

.btn.primary{
  background:rgba(34,197,94,.18);
  border-color:rgba(34,197,94,.45);
}
.btn.primary:hover{
  background:rgba(34,197,94,.23);
  border-color:rgba(34,197,94,.60);
}

.sep{
  width:1px;
  height:28px;
  background:rgba(255,255,255,.14);
  margin:0 4px;
}

.main{
  width:min(1180px, 100%);
  margin:0 auto;
  padding:12px 14px;
  display:flex;
  flex-direction:column;
  gap:12px;
}

/* ---------------- HUD ---------------- */
.hud{
  display:grid;
  grid-template-columns: 1fr 1.35fr 1fr;
  gap:12px;
  align-items:stretch;
}

.scoreBox, .centerBox{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);
  border-radius:16px;
  padding:10px 12px;
}

.scoreBox.left{
  box-shadow:0 0 0 2px rgba(25,230,215,.08) inset;
}
.scoreBox.right{
  box-shadow:0 0 0 2px rgba(127,214,255,.08) inset;
}

.scoreBox .who{
  font-weight:900;
  letter-spacing:.2px;
}
.keysHint{
  margin-top:3px;
  font-size:12px;
  opacity:.85;
}

.scoreLine{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  margin-top:8px;
  font-size:14px;
}
.scoreLine.small{
  margin-top:6px;
  font-size:13px;
  opacity:.9;
}
.value{
  font-variant-numeric: tabular-nums;
  font-weight:900;
}

/* Nouveau: dernier hit */
.hitLine{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  margin-top:6px;
  font-size:12px;
  opacity:.9;
}
.hitBadge{
  font-variant-numeric: tabular-nums;
  font-weight:950;
  padding:2px 8px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(0,0,0,.18);
}
.hitBadge.good{
  border-color: rgba(34,197,94,.35);
  background: rgba(34,197,94,.12);
}
.hitBadge.bad{
  border-color: rgba(239,68,68,.35);
  background: rgba(239,68,68,.10);
}

.centerBox{
  display:flex;
  flex-direction:column;
  gap:10px;
}

.centerTop .line{
  margin-top:4px;
  font-size:12px;
  opacity:.95;
}
.centerTop .lab{ opacity:.70; margin-right:6px; }
.centerTop .txt{ font-weight:900; }
.centerTop .txt.big{
  font-size:20px;
  letter-spacing:.2px;
}

.microHelp{
  margin-top:-2px;
  font-size:12px;
  opacity:.88;
}

/* --------- Grille --------- */
.gridBlock{
  margin-top:0;
  padding:8px 10px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.04);
}

.gridLabel{
  font-size:10px;
  opacity:.78;
  font-weight:900;
  letter-spacing:.2px;
}

#gridView.gridBig{
  margin-top:6px;
  font-size:16px;
  line-height:1.20;
  font-weight:950;
  letter-spacing:.10px;
  word-break:break-word;
}

.gridChord{
  display:inline-block;
  padding:4px 8px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(0,0,0,.18);
  margin:4px 6px 0 0;
}
.gridChord.current{
  border-color:rgba(34,197,94,.55);
  box-shadow:0 0 0 2px rgba(34,197,94,.12) inset, 0 0 18px rgba(34,197,94,.12);
}

/* ---------------- Race ---------------- */
.raceWrap{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.10);
  border-radius:16px;
  padding:10px 12px;
}

.raceTop{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  margin-bottom:8px;
  flex-wrap:wrap;
}
.raceLead .lab{ opacity:.70; margin-right:6px; font-size:12px; }
.raceLead .txt{ font-weight:950; font-variant-numeric:tabular-nums; }
.muted{ opacity:.75; }

.race{
  position:relative;
  height:260px;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.10);
  overflow:hidden;
  background:rgba(255,255,255,.02);
}

.world{
  position:absolute;
  inset:0;
  transform-origin:50% 50%;
  will-change: transform;
}

/* IMPORTANT : le canvas reçoit un contre-scale en JS (pour remplir le cadre quand world dézoome) */
.raceCanvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  transform-origin:50% 50%;
  will-change: transform;
}

.lane{
  position:absolute;
  top:0; bottom:0;
  width:50%;
  opacity:.70;
  pointer-events:none;
}
.laneL{ left:0; background:linear-gradient(90deg, rgba(25,230,215,.10), rgba(25,230,215,.03)); }
.laneR{ right:0; background:linear-gradient(-90deg, rgba(127,214,255,.10), rgba(127,214,255,.03)); }
.midLine{
  position:absolute;
  top:0; bottom:0;
  left:50%;
  width:2px;
  transform:translateX(-50%);
  background:rgba(255,255,255,.10);
  pointer-events:none;
}

/* Runner minimaliste (4× au départ) */
.runner{
  --stride: 0.36s;
  --runnerScale: 4; /* demandé : 4× plus grand au départ */
  position:absolute;
  width:36px;
  height:52px;
  transform:translate(-50%, -50%) scale(var(--runnerScale));
  pointer-events:none;
  filter: drop-shadow(0 10px 18px rgba(0,0,0,.35));
}

.runner.left{ left:35%; }
.runner.right{ left:65%; }

.runner .tag{
  position:absolute;
  left:50%;
  top:-18px;
  transform:translateX(-50%);
  font-weight:950;
  font-size:12px;
  padding:3px 8px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(0,0,0,.35);
  opacity:.92;
}

.runner.left .tag{
  box-shadow:0 0 0 2px rgba(25,230,215,.12) inset;
}
.runner.right .tag{
  box-shadow:0 0 0 2px rgba(127,214,255,.12) inset;
}

.runner .head{
  position:absolute;
  left:50%;
  top:6px;
  width:14px;
  height:14px;
  border-radius:999px;
  transform:translateX(-50%);
  border:2px solid rgba(255,255,255,.75);
  background:rgba(255,255,255,.12);
}

.runner .body{
  position:absolute;
  left:50%;
  top:20px;
  width:3px;
  height:18px;
  transform:translateX(-50%);
  background:rgba(255,255,255,.75);
  border-radius:2px;
}

.runner .arm, .runner .leg{
  position:absolute;
  left:50%;
  width:3px;
  background:rgba(255,255,255,.70);
  border-radius:2px;
  transform-origin: top center;
}

.runner .arm{
  top:22px;
  height:14px;
}
.runner .arm.a1{ transform:translateX(-50%) rotate(28deg); }
.runner .arm.a2{ transform:translateX(-50%) rotate(-28deg); opacity:.92; }

.runner .leg{
  top:36px;
  height:16px;
}

@keyframes legRun1{
  0%{ transform:translateX(-50%) rotate(22deg); }
  50%{ transform:translateX(-50%) rotate(-28deg); }
  100%{ transform:translateX(-50%) rotate(22deg); }
}
@keyframes legRun2{
  0%{ transform:translateX(-50%) rotate(-28deg); }
  50%{ transform:translateX(-50%) rotate(22deg); }
  100%{ transform:translateX(-50%) rotate(-28deg); }
}

.runner .leg.l1{ animation: legRun1 var(--stride) linear infinite; }
.runner .leg.l2{ animation: legRun2 var(--stride) linear infinite; opacity:.92; }

/* ---------------- Keyboard area ---------------- */
.kbArea{
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.10);
  border-radius:16px;
  padding:10px 12px;
}

.kbTitle{
  font-weight:900;
  margin-bottom:8px;
  opacity:.95;
}

#keyboardWrap{ position:relative; width:100%; }

.keyboard{
  position:relative;
  width:100%;
  height:72px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.02);
  overflow:hidden;
}

/* Split line (frontière B3/C4) */
#splitLine{
  position:absolute;
  top:0;
  bottom:0;
  width:4px;
  background:#ff2b2b;
  opacity:.95;
  pointer-events:none;
  z-index:50;
  border-radius:2px;
  box-shadow:0 0 0 1px rgba(0,0,0,.35);
}

.key{
  position:absolute;
  top:0;
  bottom:0;
  border:1px solid rgba(0,0,0,.55);
  user-select:none;
}

.key.white{ background:rgba(255,255,255,.92); z-index:1; }
.key.black{ background:rgba(0,0,0,.88); z-index:3; border:1px solid rgba(255,255,255,.08); }

.key .label{
  position:absolute;
  left:0; right:0;
  bottom:4px;
  text-align:center;
  font-size:10px;
  font-weight:800;
  color:rgba(0,0,0,.65);
  pointer-events:none;
}
.key.black .label{ color:rgba(255,255,255,.55); }

/* Feedback MIDI */
.key.pressL{
  background:#19e6d7 !important;
  box-shadow: 0 0 0 2px rgba(25,230,215,.45) inset, 0 0 16px rgba(25,230,215,.25);
}
.key.black.pressL{ background:#12bfb2 !important; }

.key.pressR{
  background:#7fd6ff !important;
  box-shadow: 0 0 0 2px rgba(127,214,255,.45) inset, 0 0 16px rgba(127,214,255,.22);
}
.key.black.pressR{ background:#4fbef5 !important; }

.legend{
  margin-top:8px;
  font-size:12px;
  opacity:.9;
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}
.sepSmall{
  width:1px;
  height:12px;
  background:rgba(255,255,255,.18);
  display:inline-block;
}
.dot{
  width:10px;
  height:10px;
  border-radius:999px;
  display:inline-block;
}
.dotL{ background:#19e6d7; }
.dotR{ background:#7fd6ff; }

/* ---------------- Overlay ---------------- */
.overlay{
  position:fixed;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(0,0,0,.60);
  z-index:90;
  padding:16px;
}
.overlay.hidden{ display:none; }

.panel{
  width:min(560px, 100%);
  background:rgba(15,23,42,.96);
  border:1px solid rgba(255,255,255,.12);
  border-radius:18px;
  padding:14px;
  box-shadow: 0 18px 55px rgba(0,0,0,.45);
}

.panelTitle{ font-weight:950; font-size:16px; }
.panelText{ margin-top:8px; opacity:.92; line-height:1.35; font-size:13px; }
.panelActions{ margin-top:12px; display:flex; justify-content:flex-end; gap:8px; }

/* ---------------- Toast ---------------- */
.toast{
  position:fixed;
  left:50%;
  bottom:18px;
  transform:translateX(-50%);
  background:rgba(0,0,0,.78);
  border:1px solid rgba(255,255,255,.16);
  color:rgba(255,255,255,.92);
  padding:10px 12px;
  border-radius:999px;
  font-size:13px;
  z-index:95;
  max-width:min(92vw, 720px);
  text-align:center;
}
.toast.hidden{ display:none; }

/* ---------------- Intrusion overlay ---------------- */
.intrusionOverlay{
  position:fixed;
  left:50%;
  top:42%;
  transform:translate(-50%, -50%);
  padding:12px 16px;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(0,0,0,.70);
  backdrop-filter: blur(10px);
  z-index:145;
  font-weight:950;
  font-size:26px;
  letter-spacing:.2px;
  text-align:center;
  box-shadow:0 18px 55px rgba(0,0,0,.50);
  opacity:0;
  pointer-events:none;
}
.intrusionOverlay.run{
  animation: intrusionPop 1.55s ease-out forwards;
}
@keyframes intrusionPop{
  0%{ opacity:0; transform:translate(-50%, -50%) scale(.92); }
  12%{ opacity:1; transform:translate(-50%, -50%) scale(1.02); }
  70%{ opacity:1; transform:translate(-50%, -50%) scale(1.00); }
  100%{ opacity:0; transform:translate(-50%, -58%) scale(.99); }
}
.hidden{ display:none !important; }

@media (max-width: 980px){
  .hud{ grid-template-columns:1fr; }
  .race{ height:240px; }
  .keyboard{ height:66px; }
}
@media (max-width: 520px){
  .race{ height:220px; }
  .keyboard{ height:60px; }
  .btn{ padding:9px 11px; border-radius:12px; }
  .intrusionOverlay{ font-size:22px; padding:10px 12px; }
}