:root{--ink:#13213a;--muted:#65748d;--line:#dbe4f0;--panel:#fff;--bg:#f4f7fb;--blue:#2459d8;--blue2:#1749bf;--soft:#edf3ff;--ok:#16794f;--warn:#9a5b00;--danger:#b42318;--radius:16px;--shadow:0 12px 34px rgba(20,47,88,.09)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font:14px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}button,input,select{font:inherit}button{cursor:pointer}.app{max-width:1500px;margin:auto;padding:18px}.hero{display:flex;gap:18px;align-items:flex-start;justify-content:space-between;margin-bottom:14px}.hero h1{margin:0 0 4px;font-size:clamp(24px,3vw,36px);line-height:1.1}.hero p{margin:0;color:var(--muted);max-width:980px}.hero-actions{display:flex;gap:8px;flex-wrap:wrap}.btn{border:1px solid #cbd7e8;background:#fff;color:var(--ink);border-radius:10px;padding:10px 13px;font-weight:750}.btn:hover{border-color:#9db3d5}.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff}.btn.primary:hover{background:var(--blue2)}.btn.small{padding:7px 10px;font-size:12px}.tabs{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0 15px}.tab{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 15px;font-weight:800;color:#43536d}.tab[aria-selected="true"]{background:var(--blue);color:#fff;border-color:var(--blue)}.pane{display:none}.pane.on{display:block}.grid{display:grid;grid-template-columns:minmax(320px,430px) minmax(0,1fr);gap:14px;align-items:start}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.card-head{padding:15px 17px 11px;border-bottom:1px solid var(--line)}.card-head h2,.card-head h3{margin:0;font-size:18px}.card-head p{margin:4px 0 0;color:var(--muted);font-size:12px}.card-body{padding:15px 17px}.section-title{font-size:13px;font-weight:900;text-transform:uppercase;letter-spacing:.07em;color:#52627a;margin:6px 0 10px}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.field{display:grid;gap:5px}.field.full{grid-column:1/-1}.field label{font-size:12px;font-weight:750;color:#4c5c75}.field input,.field select{width:100%;min-width:0;border:1px solid #cdd8e7;background:#fff;border-radius:9px;padding:10px 11px;color:var(--ink)}.field input[type="color"]{padding:3px;height:42px}.field input[type="range"]{padding:0;border:0}.help{font-size:11px;color:var(--muted)}.inline{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.sep{height:1px;background:var(--line);margin:14px 0}.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.metric{padding:13px;border:1px solid var(--line);border-radius:12px;background:#fbfdff}.metric span{display:block;color:var(--muted);font-size:11px}.metric strong{display:block;font-size:22px;line-height:1.1;margin-top:4px}.metric small{color:var(--muted)}.result-main{border:1px solid #b7c9ed;background:linear-gradient(135deg,#eff4ff,#fff);border-radius:14px;padding:15px;margin-bottom:12px}.result-main .big{font-size:34px;font-weight:900;color:var(--blue)}.status{display:inline-flex;align-items:center;gap:6px;padding:5px 9px;border-radius:999px;font-size:11px;font-weight:850;background:#eaf8f1;color:var(--ok)}.status.warn{background:#fff5df;color:var(--warn)}.upload{border:2px dashed #b9c8df;background:#f8fbff;border-radius:13px;padding:14px;text-align:center}.upload.drag{border-color:var(--blue);background:#eef4ff}.upload input{display:none}.ldt-info{margin-top:10px;border:1px solid var(--line);border-radius:11px;padding:11px;background:#fafcff}.ldt-info strong{display:block}.ldt-info .specs{display:flex;gap:8px;flex-wrap:wrap;margin-top:7px}.chip{border:1px solid #ccd8ea;background:#fff;padding:4px 8px;border-radius:999px;font-size:11px;font-weight:750}.preset-row{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.preset{border:1px solid #ccd8ea;background:#fff;border-radius:10px;padding:9px;font-weight:800}.preset.active{border-color:var(--blue);box-shadow:0 0 0 2px rgba(36,89,216,.12)}.color-row{display:grid;grid-template-columns:72px 42px 1fr 60px;gap:8px;align-items:center}.color-row>span{font-size:12px;font-weight:800;color:#4c5c75}.color-row input[type=color]{width:42px;height:34px;border:1px solid #ccd8ea;border-radius:8px}.color-row input[type=range]{width:100%}.reflect-list{display:grid;gap:8px}.canvas-card{position:sticky;top:10px}.viewer{position:relative;background:linear-gradient(180deg,#eaf1fb,#f9fbfe);min-height:590px}.viewer canvas{display:block;width:100%;height:590px;touch-action:none}.viewer-tools{position:absolute;top:10px;left:10px;display:flex;gap:6px;flex-wrap:wrap;z-index:3}.legend{position:absolute;left:12px;bottom:12px;background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:11px;box-shadow:0 5px 20px rgba(0,0,0,.08)}.legendbar{width:180px;height:9px;border-radius:99px;background:linear-gradient(90deg,#263d9a,#16a3df,#31b66b,#e5c83d,#e86a34,#b92020);margin:4px 0}.note{border-left:4px solid #9ab1d8;background:#f6f9fd;padding:10px 12px;border-radius:0 10px 10px 0;color:#53637b;font-size:12px}.warning{border-left-color:#e0a43b;background:#fff9eb;color:#745019}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:9px 8px;border-bottom:1px solid var(--line);text-align:left}.table th{font-size:11px;text-transform:uppercase;color:#65748d}.shape-visual{height:210px;border:1px solid var(--line);border-radius:12px;background:#f8fbff;display:grid;place-items:center}.shape-visual svg{width:92%;height:92%}.report{display:grid;gap:12px}.report-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.no-print{}@media(max-width:980px){.grid{grid-template-columns:1fr}.canvas-card{position:static}.viewer,.viewer canvas{min-height:470px;height:470px}.metrics{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.app{padding:10px}.hero{display:block}.hero-actions{margin-top:10px}.fields,.report-row{grid-template-columns:1fr}.metrics{grid-template-columns:1fr 1fr}.preset-row{grid-template-columns:1fr}.viewer,.viewer canvas{min-height:390px;height:390px}}@media print{body{background:#fff}.app{max-width:none;padding:0}.hero-actions,.tabs,.no-print,.viewer-tools{display:none!important}.pane{display:block!important;margin-bottom:18px}.grid{grid-template-columns:1fr}.card{box-shadow:none;break-inside:avoid}.canvas-card{position:static}.viewer,.viewer canvas{height:440px;min-height:440px}}

/* v5.0.1 — chargement visible et calcul non bloquant visuellement */
.app-loader{position:fixed;inset:0;z-index:9999;display:none;place-items:center;padding:20px;background:#f4f7fb;color:var(--ink);transition:opacity .18s ease,visibility .18s ease}
.app-loader.on{display:grid}.app-loader.done{opacity:0;visibility:hidden;pointer-events:none}
.app-loader-card{width:min(520px,92vw);padding:22px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow)}
.app-loader-card strong{display:block;font-size:18px;margin-bottom:12px}.app-loader-card small{display:block;color:var(--muted);margin-top:9px}
.app-loader-progress{height:11px;overflow:hidden;border-radius:99px;background:#e2e9f3}.app-loader-progress span{display:block;width:8%;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--blue),#5d88f1);transition:width .2s ease}
.calc-progress{position:fixed;z-index:9000;top:10px;left:50%;transform:translateX(-50%) translateY(-18px);width:min(430px,calc(100vw - 24px));padding:8px 10px;border:1px solid #cbd8eb;border-radius:12px;background:rgba(255,255,255,.96);box-shadow:0 8px 25px rgba(20,47,88,.13);opacity:0;visibility:hidden;transition:.15s ease}
.calc-progress.on{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}.calc-progress>span{display:block;height:5px;border-radius:99px;background:linear-gradient(90deg,var(--blue),#5d88f1);animation:pvCalcBar 1.05s ease-in-out infinite}.calc-progress small{display:block;margin-top:4px;color:var(--muted);text-align:center;font-weight:700}
@keyframes pvCalcBar{0%{width:12%}55%{width:78%}100%{width:100%}}
@media(prefers-reduced-motion:reduce){.app-loader-progress span,.calc-progress,.calc-progress>span{transition:none;animation:none}}

/* v5.1.0 — étude d'éclairage 2D/3D */
[hidden]{display:none!important}
.eyebrow{font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.09em;color:#52627a;margin-bottom:5px}
.norm-banner{display:flex;gap:10px;align-items:flex-start;border:1px solid #e8c66c;background:#fff9e8;color:#684d0b;border-radius:13px;padding:12px 14px;margin:0 0 14px}.norm-banner strong{white-space:nowrap}.norm-banner span{font-size:12px;line-height:1.45}
.lighting-grid{grid-template-columns:minmax(360px,520px) minmax(0,1fr)}.settings-column{display:grid;gap:14px}
.plan-editor-wrap{margin-top:12px;border:1px solid var(--line);border-radius:13px;background:#fbfdff;overflow:hidden}.plan-toolbar{display:flex;gap:6px;flex-wrap:wrap;padding:8px;border-bottom:1px solid var(--line);background:#f5f8fd}.plan-toolbar .btn:disabled{opacity:.45;cursor:not-allowed}.plan-editor-wrap canvas{display:block;width:100%;height:auto;aspect-ratio:720/420;touch-action:manipulation}.custom-help{padding:0 10px 10px;margin:6px 0 0}
.reflect-palette{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin-top:12px}.rho-swatch{border:1px solid #ccd8ea;background:#fff;border-radius:10px;padding:7px;text-align:left;display:grid;grid-template-columns:28px 1fr;grid-template-areas:"dot name" "dot val";column-gap:8px;align-items:center;color:var(--ink)}.rho-swatch:hover{border-color:#8aa6d6;box-shadow:0 0 0 2px rgba(36,89,216,.08)}.rho-swatch i{grid-area:dot;width:28px;height:28px;border-radius:8px;background:var(--sw);border:1px solid rgba(0,0,0,.18)}.rho-swatch span{grid-area:name;font-size:11px;font-weight:800}.rho-swatch b{grid-area:val;font-size:10px;color:var(--muted)}
.explain{margin-top:12px;border:1px solid var(--line);border-radius:11px;background:#fbfdff}.explain summary{cursor:pointer;padding:10px 12px;font-weight:800;color:#40516c}.explain>div{padding:0 12px 10px;color:#52627a;font-size:12px}.explain p{margin:7px 0}
.dialux-box{display:flex;gap:12px;justify-content:space-between;align-items:center;margin-top:12px;padding:12px 14px;border:1px solid #c9d6eb;border-radius:13px;background:#f7faff}.dialux-box strong{display:block}.dialux-box p{margin:3px 0 0;color:var(--muted);font-size:11px;max-width:760px}.dialux-box .btn{flex:none}
@media(max-width:1080px){.lighting-grid{grid-template-columns:1fr}.canvas-card{position:static}.norm-banner{display:block}.norm-banner strong{display:block;margin-bottom:4px}}
@media(max-width:620px){.reflect-palette{grid-template-columns:repeat(2,minmax(0,1fr))}.dialux-box{display:block}.dialux-box .btn{display:inline-block;margin-top:8px}.plan-toolbar .btn{flex:1 1 46%}}