:root{
  --bg:#f3f6f9;--card:#fff;--ink:#14212b;--mute:#5d6b78;--line:#dbe2e8;--soft:#eef3f7;
  --acc:#0b6bcb;--acc-ink:#fff;--ok:#0a7a5a;--warn:#b45309;--bad:#c0392b;--shadow:0 1px 2px rgba(20,33,43,.06),0 4px 14px rgba(20,33,43,.05);
  --c1:#2f80ed;--c2:#27ae60;--c3:#f2994a;--c4:#9b51e0;--c5:#eb5757;--c6:#56ccf2;--c7:#bb6bd9;--c8:#828f9b;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0d141b;--card:#151e27;--ink:#e6edf3;--mute:#8e9ba7;--line:#26323d;--soft:#1b2630;
  --acc:#4c9aff;--acc-ink:#05121f;--ok:#3fb68b;--warn:#e0a458;--bad:#ff7b72;--shadow:none}}
*{box-sizing:border-box}
html{color-scheme:light dark}
body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif}
.muted{color:var(--mute)}.pad{padding:16px}
h1{font-size:17px;margin:0;line-height:1.1}
small{color:var(--mute)}

.top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:10px 20px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.brand{display:flex;gap:10px;align-items:center}
.logo{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,#2f80ed,#27ae60);color:#fff;font-weight:700;font-size:13px}
.top-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
button,.btn,select,input{font:inherit;color:var(--ink)}
button,.btn{padding:6px 12px;border:1px solid var(--line);border-radius:7px;background:var(--card);cursor:pointer}
button:hover,.btn:hover{border-color:var(--acc)}
button.primary{background:var(--acc);color:var(--acc-ink);border-color:var(--acc)}
button.ghost{border-color:transparent;background:transparent;color:var(--acc)}
button.danger{color:var(--bad)}
button:focus-visible,input:focus-visible,select:focus-visible,.btn:focus-within{outline:2px solid var(--acc);outline-offset:1px}
input,select{width:100%;padding:6px 8px;border:1px solid var(--line);border-radius:7px;background:var(--bg)}
input.proj{width:180px}select#preset{width:210px}
input[type=checkbox]{width:auto}
input[type=range]{padding:0;accent-color:var(--acc)}

.hero{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;padding:16px 20px 0}
.stat{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 14px;box-shadow:var(--shadow)}
.stat b{display:block;font-size:22px;line-height:1.2;font-variant-numeric:tabular-nums}
.stat span{color:var(--mute);font-size:12px;text-transform:uppercase;letter-spacing:.05em}
.stat.main b{font-size:30px;color:var(--ok)}
.stat.bad b{color:var(--bad)}

main{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:16px;padding:16px 20px 40px;align-items:start}
.col-main{min-width:0}
.col-side{position:sticky;top:64px;max-height:calc(100vh - 80px);overflow:auto;padding:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-bottom:14px;box-shadow:var(--shadow)}
.card h2{font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--mute);margin:0 0 10px;font-weight:600}
.card h3{font-size:13px;margin:14px 0 4px}

.viewer{padding:0;overflow:hidden}
.viewer-bar{display:flex;align-items:center;gap:12px;padding:8px 12px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.viewer-bar .muted{flex:1;font-size:12px;min-width:200px}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg button{border:0;border-radius:0;padding:5px 14px;background:transparent}
.seg button.on{background:var(--acc);color:var(--acc-ink)}
.v3d{height:430px;background:linear-gradient(#e9f1f8,#f7fafc);position:relative}
@media (prefers-color-scheme:dark){.v3d{background:linear-gradient(#1b2a38,#0f1821)}}
.v3d canvas{display:block;width:100%;height:100%;touch-action:none}
.plan{background:#fff}
.plan svg{display:block;width:100%;height:430px;user-select:none;-webkit-user-select:none}
[hidden]{display:none!important}

.tabs{display:flex;position:sticky;top:0;background:var(--card);border-bottom:1px solid var(--line);z-index:2;border-radius:10px 10px 0 0}
.tabs button{flex:1;border:0;border-radius:0;background:transparent;padding:11px 4px;color:var(--mute);border-bottom:2px solid transparent;font-weight:600}
.tabs button.on{color:var(--acc);border-bottom-color:var(--acc)}
#panel{padding:12px 14px 16px}
.group{border:1px solid var(--line);border-radius:9px;padding:10px 12px;margin-bottom:12px}
.group h2{margin:0 0 6px}
.row{display:grid;grid-template-columns:1fr 118px;gap:8px;align-items:center;margin:6px 0}
.row label{color:var(--ink)}
.row .hint{grid-column:1/-1;margin-top:-4px;font-size:12px;color:var(--mute)}
.btns{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.note{font-size:12px;color:var(--mute);margin:6px 0}

table{width:100%;border-collapse:collapse}
th{color:var(--mute);font-weight:600;font-size:12px}
td,th{padding:5px 6px;text-align:right;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
td:first-child,th:first-child{text-align:left}
tr:last-child td{border-bottom:0}
.stack{display:flex;height:14px;border-radius:7px;overflow:hidden;background:var(--soft);margin-bottom:10px}
.stack i{display:block;height:100%}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:7px}
.pass{color:var(--ok);font-weight:600}.fail{color:var(--bad);font-weight:600}
.chk{display:flex;gap:10px;align-items:flex-start;padding:8px 12px;margin-bottom:8px;border-radius:9px;background:var(--card);border:1px solid var(--line);border-left:4px solid var(--warn)}
.chk.info{border-left-color:var(--acc)}.chk.ok{border-left-color:var(--ok)}
.print-only{display:none}

@media (max-width:980px){
  main{grid-template-columns:1fr;padding:12px 16px 32px}
  .col-side{position:static;max-height:none;order:-1}
  .v3d{height:320px}.plan svg{height:320px}
  .hero{padding:12px 16px 0}.top{padding:10px 16px;position:static}
}
@media print{
  :root{--bg:#fff;--card:#fff;--ink:#000;--line:#bbb;--mute:#444;--shadow:none}
  .top,.col-side,.viewer,.hero .stat:nth-child(n+7){display:none!important}
  main{display:block;padding:0}.card{box-shadow:none;break-inside:avoid}
  .print-only{display:block}.print-only svg{width:100%;height:auto;max-height:420px}
  .hero{padding:0 0 8px}
}

/* proposal: the required capacity line and the estimate tag */
.paper .req-line{margin:6px 0 0;font-weight:600}
.paper .est{display:inline-block;margin:8px 0 0;padding:3px 10px;border-radius:99px;background:#fff3cd;color:#7a5b00;font-size:.85em}