:root {
  --ink:#181b21; --ink-2:#20242c; --ink-3:#2a2f39;
  --line:rgba(255,255,255,0.08); --line-strong:rgba(255,255,255,0.16);
  --text:#e8eaef; --muted:#9aa3b0; --accent:#f4c430; --accent-deep:#c79a17;
  --paper:#eef1f5; --stop-red:#d23b34; --focus:#79b8ff;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;} html,body{height:100%;margin:0;}
body{font-family:var(--sans);background:var(--ink);color:var(--text);display:flex;flex-direction:column;min-height:100vh;}
header{display:flex;align-items:center;gap:16px;padding:12px 20px;background:var(--ink-2);border-bottom:1px solid var(--line);flex-wrap:wrap;}
header .title{display:flex;flex-direction:column;}
header h1{font-size:15px;font-weight:600;letter-spacing:.3px;margin:0;}
header .sub{font-family:var(--mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1px;margin-top:2px;}
header .spacer{flex:1;}
.act{font-family:var(--sans);font-size:13px;background:var(--ink-3);color:var(--text);border:1px solid var(--line-strong);border-radius:6px;padding:7px 13px;cursor:pointer;transition:background .15s,border-color .15s;}
.act:hover{background:#333a45;} .act:focus-visible{outline:2px solid var(--focus);outline-offset:2px;}
.act.primary{background:var(--accent);color:#2a2200;border-color:var(--accent-deep);font-weight:600;}
.act.primary:hover{background:#ffd23f;} .act.danger:hover{background:#4a2520;border-color:#7a3a32;}
.main{flex:1;display:grid;grid-template-columns:215px 1fr 320px;min-height:0;}
.toolbar{background:var(--ink-2);border-right:1px solid var(--line);padding:14px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;}
.toolbar > *{flex-shrink:0;}   /* sur petit écran, la barre défile au lieu d'écraser les boutons */
.group-label{font-family:var(--mono);font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:1.2px;margin:10px 2px 4px;}
.tool{display:flex;align-items:center;gap:10px;background:transparent;color:var(--text);border:1px solid transparent;border-radius:6px;padding:8px 10px;cursor:pointer;text-align:left;font-size:13px;width:100%;transition:background .12s,border-color .12s;}
.tool:hover{background:var(--ink-3);} .tool:focus-visible{outline:2px solid var(--focus);outline-offset:1px;}
.tool[aria-pressed="true"]{background:rgba(244,196,48,0.12);border-color:rgba(244,196,48,0.5);}
.tool[aria-pressed="true"] .ico{color:var(--accent);}
.tool .ico{width:20px;height:20px;flex:none;color:var(--muted);} .tool .ico svg{width:100%;height:100%;display:block;}
.seg{display:flex;border:1px solid var(--line-strong);border-radius:6px;overflow:hidden;}
.seg button{flex:1;background:transparent;color:var(--muted);border:none;cursor:pointer;font-size:12px;padding:6px 4px;font-family:var(--sans);}
.seg button:hover{background:var(--ink-3);}
.seg button[aria-pressed="true"]{background:var(--accent);color:#2a2200;font-weight:600;}
.field-label{font-size:11px;color:var(--muted);margin:8px 2px 3px;}
.board{position:relative;display:flex;align-items:center;justify-content:center;padding:24px;overflow:auto;background:radial-gradient(circle at 1px 1px,rgba(255,255,255,0.025) 1px,transparent 0) 0 0/22px 22px,var(--ink);}
.canvas-wrap{background:var(--paper);border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,0.4);border:1px solid #000;line-height:0;max-width:100%;}
canvas{display:block;width:100%;height:auto;max-width:960px;cursor:crosshair;border-radius:10px;}
.panel{background:var(--ink-2);border-left:1px solid var(--line);padding:16px;display:flex;flex-direction:column;gap:16px;overflow-y:auto;}
.panel h2{font-family:var(--mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1.2px;margin:0 0 8px;}
.sim-row{display:flex;align-items:center;gap:10px;}
.sim-row input[type=range]{flex:1;accent-color:var(--accent);}
.legend{display:flex;flex-direction:column;gap:7px;}
.legend .row{display:flex;align-items:center;gap:10px;font-size:12.5px;}
.legend .sw{width:20px;height:20px;border-radius:4px;flex:none;}
.hint{font-size:12px;color:var(--muted);line-height:1.55;} .hint b{color:var(--text);font-weight:600;}
textarea{width:100%;height:120px;resize:vertical;background:var(--ink);color:var(--text);border:1px solid var(--line-strong);border-radius:6px;font-family:var(--mono);font-size:11px;padding:10px;line-height:1.5;}
textarea:focus-visible{outline:2px solid var(--focus);outline-offset:1px;}
.stat{font-family:var(--mono);font-size:11px;color:var(--muted);} .stat span{color:var(--accent);}
/* mode Niveaux : les éléments propres à un mode sont masqués dans l'autre */
body:not(.mode-niveau) .niveau-only{display:none!important;} body.mode-niveau .libre-only{display:none!important;}
/* mode Villes : outils et panneaux de la micro-simulation masqués */
body.mode-villes .libre-only, body.mode-villes .micro-only{display:none!important;} body:not(.mode-villes) .villes-only{display:none!important;}
.toolbar .micro-only > *, .toolbar .villes-only > *{flex-shrink:0;}
.lvl-list{display:flex;flex-direction:column;gap:4px;}
.lvl-list button{display:flex;justify-content:space-between;gap:8px;text-align:left;font-size:12.5px;background:transparent;color:var(--text);border:1px solid var(--line);border-radius:6px;padding:6px 9px;cursor:pointer;font-family:var(--sans);}
.lvl-list button:hover:not(:disabled){background:var(--ink-3);} .lvl-list button:disabled{color:var(--muted);cursor:not-allowed;opacity:.6;}
.lvl-list button[aria-current="true"]{border-color:rgba(244,196,48,0.6);background:rgba(244,196,48,0.1);}
.lvl-list .stars{color:var(--accent);font-family:var(--mono);letter-spacing:1px;}
.lvl-title{font-size:15px;font-weight:600;margin:4px 0 6px;}
.lvl-cost{border:1px solid var(--line-strong);border-radius:8px;padding:10px 12px;}
.lvl-cost .big{font-family:var(--mono);font-size:22px;font-weight:700;color:var(--accent);line-height:1.2;}
.lvl-result{border-radius:8px;padding:12px;border:1px solid var(--line-strong);}
.lvl-result.ok{border-color:rgba(52,179,107,0.6);background:rgba(52,179,107,0.08);}
.lvl-result.ko{border-color:rgba(210,59,52,0.6);background:rgba(210,59,52,0.08);}
.lvl-result .verdict{font-size:16px;font-weight:700;margin-bottom:6px;}
details.hint summary{cursor:pointer;color:var(--text);}
details.hypotheses{margin-top:8px;font-size:12px;color:var(--muted);}details.hypotheses summary{cursor:pointer;color:var(--text);}
details.hypotheses ul{margin:4px 0 0;padding-left:16px;line-height:1.5;}
@media(max-width:940px){.main{grid-template-columns:1fr;grid-template-rows:auto 1fr auto;}
  .toolbar{flex-direction:row;flex-wrap:wrap;border-right:none;border-bottom:1px solid var(--line);}
  .group-label{width:100%;} .tool{width:auto;} .panel{border-left:none;border-top:1px solid var(--line);}}
/* éditeur de niveaux */
details.editeur summary{cursor:pointer;font-family:var(--mono);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:1.2px;}
.champ{width:100%;background:var(--ink);color:var(--text);border:1px solid var(--line-strong);border-radius:6px;padding:6px 8px;font-family:var(--sans);font-size:12.5px;}
.champ:focus-visible,.grille-champs input:focus-visible,.flux select:focus-visible,.flux input:focus-visible{outline:2px solid var(--focus);outline-offset:1px;}
.grille-champs{display:grid;grid-template-columns:1fr 1fr;gap:6px 8px;margin-top:10px;}
.grille-champs label{font-size:11px;color:var(--muted);display:flex;flex-direction:column;gap:3px;}
.grille-champs input,.grille-champs select,.flux select,.flux input{background:var(--ink);color:var(--text);border:1px solid var(--line-strong);border-radius:5px;padding:4px 6px;font-size:12px;min-width:0;}
.flux{margin-top:6px;padding-bottom:6px;border-bottom:1px solid var(--line);}
.flux-od{display:grid;grid-template-columns:1fr 1fr 48px 24px;gap:4px;align-items:center;}
.flux-mix{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin-top:3px;}
.flux-mix label{display:flex;flex-direction:column;font-size:10px;color:var(--muted);gap:1px;}
.flux button{background:transparent;border:none;color:var(--muted);cursor:pointer;font-size:14px;}
.flux button:hover{color:var(--stop-red);}
.mes-niveaux-ligne{display:flex;gap:6px;align-items:center;margin-top:4px;}
.mes-niveaux-ligne span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text);}
/* tutoriel */
#tuto{position:absolute;left:50%;top:14px;transform:translateX(-50%);width:min(560px,calc(100% - 32px));background:var(--ink-2);color:var(--text);border:1px solid rgba(244,196,48,0.7);border-radius:10px;padding:12px 14px;box-shadow:0 8px 30px rgba(0,0,0,0.45);z-index:5;font-size:13.5px;line-height:1.55;}
#tuto b{color:var(--accent);}
#tuto .tuto-pied{display:flex;justify-content:space-between;align-items:center;margin-top:8px;}
#tuto .tuto-n{font-family:var(--mono);font-size:11px;color:var(--muted);}
/* propositions */
.proposition{border:1px solid var(--line-strong);border-radius:8px;padding:8px 10px;background:rgba(255,255,255,0.02);}
.proposition .prop-tete{font-size:13px;line-height:1.4;}
.proposition .hint{margin:2px 0;}
.proposition .statut{font-size:11px;border-radius:4px;padding:1px 6px;margin-left:4px;background:var(--ink-3);}
.proposition .statut.retenue{background:rgba(52,179,107,0.25);}.proposition .statut.ecartee{background:rgba(224,71,62,0.25);}
.proposition .commentaires{margin-top:4px;border-top:1px solid var(--line);padding-top:4px;display:flex;flex-direction:column;gap:4px;}
.proposition .commentaire{font-size:12px;line-height:1.4;}.proposition .commentaire b{color:var(--text);}
.proposition .commentaires input,.proposition .commentaires textarea,.proposition select{background:var(--ink);color:var(--text);border:1px solid var(--line-strong);border-radius:5px;padding:3px 6px;font-size:12px;}