:root{
  --bg:#071018;
  --panel:#0e1c28;
  --line:#1b4058;
  --accent:#55d8ff;
  --ok:#63e6a2;
  --warn:#ffca5c;
  --danger:#ff647c;
  --text:#eef8ff;
}

*{box-sizing:border-box}

body{
  margin:0;
  min-height:100vh;
  background:
    radial-gradient(circle at 50% 0%, #123047 0%, #071018 42%, #03070b 100%);
  color:var(--text);
  font-family:Inter,system-ui,Arial,sans-serif;
  overflow:hidden;
}

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

header{
  min-height:62px;
  display:flex;
  align-items:center;
  gap:18px;
  padding:8px 16px;
  border-bottom:1px solid #17384e;
  background:rgba(5,14,21,.9);
  backdrop-filter:blur(8px);
}

.brand{
  font-weight:900;
  letter-spacing:.16em;
  color:var(--accent);
  white-space:nowrap;
}

.hud{
  display:flex;
  gap:18px;
  align-items:center;
  flex-wrap:wrap;
  font-size:14px;
}

.hud b{color:white}

.bar{
  width:180px;
  height:12px;
  border-radius:99px;
  overflow:hidden;
  background:#152532;
  border:1px solid #27465b;
}

.bar > div{
  height:100%;
  width:100%;
  background:linear-gradient(90deg,var(--danger),var(--warn),var(--ok));
  transition:width .2s ease;
}

main{
  position:relative;
  flex:1;
  display:grid;
  place-items:center;
  min-height:0;
}

canvas{
  width:min(92vw,960px);
  height:auto;
  max-height:calc(100vh - 84px);
  image-rendering:auto;
  border:1px solid #24657f;
  border-radius:14px;
  box-shadow:0 0 60px rgba(40,180,240,.20),0 30px 80px rgba(0,0,0,.45);
  background:#061019;
}

.screen,.modal{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  background:rgba(1,6,10,.78);
  backdrop-filter:blur(6px);
  z-index:10;
}

.hidden{display:none !important}

.panel{
  width:min(92vw,620px);
  padding:28px;
  border-radius:18px;
  background:linear-gradient(180deg,rgba(18,37,51,.98),rgba(8,21,30,.98));
  border:1px solid #28536d;
  box-shadow:0 25px 80px rgba(0,0,0,.45);
}

h1,h2,p{margin-top:0}
h1{
  font-size:clamp(38px,7vw,72px);
  margin-bottom:4px;
  letter-spacing:.08em;
  color:var(--accent);
}

.subtitle{
  text-transform:uppercase;
  letter-spacing:.22em;
  opacity:.8;
  margin-bottom:22px;
}

.level-picker{
  display:grid;
  gap:7px;
  margin:20px 0 6px;
  color:#8ce8ff;
  font-size:13px;
  font-weight:900;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.level-picker select{
  width:100%;
  padding:12px 42px 12px 14px;
  border:1px solid #34708e;
  border-radius:10px;
  background:#0c2636;
  color:white;
  font:700 15px Inter,system-ui,Arial,sans-serif;
  cursor:pointer;
}

.level-picker select:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}

.level-select-help{
  margin-bottom:18px;
  font-size:12px;
  opacity:.7;
}

.mission-results{
  display:grid;
  gap:6px;
  margin:14px 0 18px;
  padding:0;
  list-style:none;
}

.mission-results li{
  display:grid;
  grid-template-columns:1fr auto 72px;
  align-items:center;
  gap:12px;
  padding:8px 10px;
  border:1px solid #24475d;
  border-radius:8px;
  background:#091923;
  font-size:13px;
}

.mission-results li > b{text-align:right}
.mission-results .is-success{color:var(--ok)}
.mission-results .is-muted{color:#91a5b2}
.final-score{
  display:block;
  margin-top:14px;
  color:var(--accent);
  font-size:20px;
  font-weight:900;
}

#endScreen .panel{
  max-height:calc(100vh - 24px);
  overflow-y:auto;
}

button{
  appearance:none;
  border:1px solid #34708e;
  background:#102c3d;
  color:white;
  font-weight:800;
  padding:12px 18px;
  border-radius:10px;
  cursor:pointer;
  transition:.15s ease;
}

button:hover{
  transform:translateY(-1px);
  background:#174058;
}

.choices{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
  margin:18px 0;
}

.choice{
  min-height:54px;
}

.feedback{
  min-height:44px;
  padding:10px 12px;
  border-radius:10px;
  background:#0a1821;
  border:1px solid #19384c;
  margin-top:12px;
  line-height:1.4;
}

.hint{
  opacity:.75;
  font-size:14px;
}

#touch{
  position:absolute;
  left:18px;
  bottom:18px;
  display:none;
  grid-template-columns:58px 58px 58px;
  grid-template-rows:58px 58px 58px;
  gap:4px;
  z-index:4;
}

#touch button{
  padding:0;
  font-size:22px;
  opacity:.85;
  touch-action:none;
}

#touch .up{grid-column:2;grid-row:1}
#touch .left{grid-column:1;grid-row:2}
#touch .down{grid-column:2;grid-row:3}
#touch .right{grid-column:3;grid-row:2}

@media (pointer:coarse), (max-width:760px){
  #touch{display:grid}
  header{gap:10px;padding:8px}
  .bar{width:110px}
  .hud{gap:10px;font-size:12px}
}

.circuit-builder{margin-top:10px}
.circuit-builder.hidden{display:none}
.modal .panel{
  max-height:calc(100vh - 24px);
  overflow-x:hidden;
  overflow-y:auto;
}
.circuit-palette{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin:10px 0}
.circuit-palette button{padding:8px 12px;font-size:12px}
.circuit-stage{
  position:relative;width:100%;height:min(300px,45vh);margin:10px auto;
  border:1px solid rgba(91,221,255,.48);border-radius:14px;overflow:hidden;
  background:
    linear-gradient(rgba(71,179,207,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(71,179,207,.09) 1px,transparent 1px),
    rgba(4,15,24,.96);
  background-size:20px 20px;
}
.circuit-wires{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.circuit-component{
  position:absolute;width:14.7368%;height:16.9231%;transform:translate(-50%,-50%);
  border:0;border-radius:0;
  background:transparent;box-shadow:none;
  display:grid;place-items:center;cursor:grab;touch-action:none;user-select:none;
}
.circuit-component svg{width:82%;height:73%}
.circuit-terminal{
  position:absolute;width:12px;height:12px;border-radius:50%;background:#eefcff;
  border:2px solid #4be0ff;box-shadow:0 0 10px rgba(75,224,255,.9);
  transform:translate(-50%,-50%);cursor:crosshair;
}
.circuit-terminal.left{left:0;top:50%}.circuit-terminal.right{left:100%;top:50%}
.circuit-terminal.selected{background:#fff0a8;border-color:#ffd15c;box-shadow:0 0 13px #ffd15c}
.circuit-terminal.snap{
  width:18px;height:18px;
  background:#c9ffdc;border-color:#63e6a2;
  box-shadow:0 0 16px #63e6a2;
}
.circuit-wire-preview{
  fill:none;stroke:#ffe27a;stroke-width:4;
  stroke-dasharray:8 6;stroke-linejoin:miter;stroke-linecap:square;
  pointer-events:none;
}
.circuit-wire-handle{
  position:absolute;z-index:4;width:22px;height:22px;padding:0;
  border:3px solid #fff0a8;border-radius:50%;background:#ffca5c;
  box-shadow:0 0 16px rgba(255,202,92,.95);
  transform:translate(-50%,-50%);touch-action:none;
}
.circuit-wire-handle:hover{transform:translate(-50%,-50%) scale(1.08);background:#ffe08c}
.circuit-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.circuit-help{font-size:12px;opacity:.72;margin:8px auto 0;max-width:700px}

/* Éléments d'interface autrefois stylés directement dans le HTML. */
#levelInfo{
  position:absolute;
  top:12px;
  left:18px;
  z-index:3;
  max-width:420px;
  padding:8px 12px;
  border:1px solid #24475d;
  border-radius:10px;
  background:rgba(5,14,21,.82);
  pointer-events:none;
}

#levelName{
  color:#8ce8ff;
  font-size:13px;
  font-weight:900;
  letter-spacing:.08em;
}

#levelObjective{
  margin-top:3px;
  font-size:12px;
  opacity:.78;
}

#challengeInteractive{
  margin:14px 0;
}

#symbolVisual{
  display:grid;
  min-height:120px;
  margin:8px 0 16px;
  place-items:center;
}