/* One stylesheet, no build step. Light and dark both defined on :root, so the page never
   borrows a colour it did not choose. */
:root{
  --bg:#f6f7f5; --panel:#ffffff; --ink:#17201a; --muted:#5d6b60; --line:#e2e7e1;
  --accent:#2f7a4f; --accent-ink:#ffffff; --warn:#9a6b12; --warn-bg:#fdf5e4;
  --bad:#a3322c; --bad-bg:#fbeceb; --ok:#256b46; --ok-bg:#e9f4ee; --radius:14px;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#12160f; --panel:#191e17; --ink:#e9efe7; --muted:#9aa79b; --line:#2a322a;
    --accent:#63b184; --accent-ink:#0d1410; --warn:#e0b661; --warn-bg:#2a2415;
    --bad:#e98f88; --bad-bg:#2c1a18; --ok:#8ed3ac; --ok-bg:#16251c;
  }
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  background:var(--bg); color:var(--ink); font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  padding-bottom:env(safe-area-inset-bottom); overflow-x:hidden;
}
.wrap{max-width:1200px; margin:0 auto; padding:0 16px}
.row{display:flex; align-items:baseline; gap:12px}
.top{background:var(--panel); border-bottom:1px solid var(--line); padding:14px 0; position:sticky; top:0; z-index:5}
.brand{font-weight:650; letter-spacing:-0.01em}
.brand em{color:var(--accent); font-style:normal}
.pagetitle{color:var(--muted)}
.layout{display:grid; grid-template-columns:minmax(320px,380px) 1fr; gap:20px; padding-top:20px; padding-bottom:40px; align-items:start}
@media (max-width:900px){ .layout{grid-template-columns:1fr} }

.panel{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:16px; position:sticky; top:70px}
@media (max-width:900px){ .panel{position:static} }
.notice{background:var(--ok-bg); color:var(--ok); border-radius:10px; padding:10px 12px; margin:0 0 14px; font-size:14px}
.sec{border-top:1px solid var(--line); padding:10px 0}
.sec:first-of-type{border-top:0}
.sec summary{cursor:pointer; font-weight:600; padding:4px 0}
.fields{display:grid; grid-template-columns:1fr 1fr; gap:10px; padding-top:8px}
.fields .wide{grid-column:1/-1}
/* min-width:0 on both, or an input's default intrinsic width (about 20 characters) sets the
   grid column's minimum and the form runs off the side of a phone. */
label{display:flex; flex-direction:column; gap:4px; font-size:13px; color:var(--muted); min-width:0}
input,select,button{font:inherit; color:var(--ink)}
input,select{background:var(--bg); border:1px solid var(--line); border-radius:10px; padding:9px 10px; min-height:42px; width:100%; min-width:0}
input:focus,select:focus{outline:2px solid var(--accent); outline-offset:1px}
.hide{display:none !important}
.hint{color:var(--muted); font-size:13px; margin:8px 0 0}
.actions{display:flex; gap:10px; padding-top:14px}
button{background:var(--panel); border:1px solid var(--line); border-radius:12px; padding:11px 16px; min-height:44px; cursor:pointer}
button.primary{background:var(--accent); color:var(--accent-ink); border-color:transparent; font-weight:600; flex:1}
button:active{transform:translateY(1px)}
.err{background:var(--bad-bg); color:var(--bad); border-radius:10px; padding:10px 12px; font-size:14px}

.results{display:flex; flex-direction:column; gap:16px; min-width:0}
.strip{display:flex; flex-wrap:wrap; gap:10px}
.pill{border-radius:999px; padding:7px 13px; font-size:14px; font-weight:600}
.pill.ok{background:var(--ok-bg); color:var(--ok)}
.pill.warn{background:var(--warn-bg); color:var(--warn)}
.pill.bad{background:var(--bad-bg); color:var(--bad)}
.card{background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:16px; min-width:0}
.card header{display:flex; flex-wrap:wrap; gap:10px; align-items:center; justify-content:space-between; margin-bottom:12px}
.card h2{font-size:15px; margin:0; letter-spacing:-0.01em}
.card summary{cursor:pointer}
.card summary h2{display:inline}
.two{display:grid; grid-template-columns:1fr 1fr; gap:16px}
@media (max-width:760px){ .two{grid-template-columns:1fr} }
.toggles{display:flex; flex-wrap:wrap; gap:8px}
.toggle{display:flex; align-items:center; gap:6px; font-size:13px; color:var(--muted); background:var(--bg); border:1px solid var(--line); border-radius:999px; padding:5px 11px; cursor:pointer}
.toggle input{min-height:0; width:15px; height:15px; padding:0}
.swatch{width:11px; height:11px; border-radius:3px; display:inline-block}
.canvas-wrap{aspect-ratio:16/10; width:100%; border-radius:10px; overflow:hidden; background:var(--bg)}
@media (max-width:600px){ .canvas-wrap{aspect-ratio:4/3} }
canvas{display:block; width:100%; height:100%; touch-action:none}

table{width:100%; border-collapse:collapse; font-size:14px; display:block; overflow-x:auto}
th,td{text-align:left; padding:7px 10px; border-bottom:1px solid var(--line); white-space:nowrap}
th{color:var(--muted); font-weight:600; font-size:12px; text-transform:uppercase; letter-spacing:.04em}
td.num,th.num{text-align:right; font-variant-numeric:tabular-nums}
td.soft{color:var(--muted)}
tr:last-child td{border-bottom:0}

.notes{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px}
.notes li{border-radius:10px; padding:11px 13px; font-size:14px}
.notes li.error{background:var(--bad-bg); color:var(--bad)}
.notes li.warning{background:var(--warn-bg); color:var(--warn)}
.notes li.info{background:var(--bg); color:var(--muted)}
.notes .ref{display:block; margin-top:4px; font-size:12px; opacity:.75}
.assumptions{color:var(--muted); font-size:14px; padding-left:18px; margin:10px 0 0}
.assumptions li{margin-bottom:6px}

.chips{display:flex; flex-wrap:wrap; gap:6px; padding:8px 0}
.chip{border-radius:999px; border:1px solid var(--line); background:var(--bg); padding:6px 11px; font-size:13px; cursor:pointer; min-height:36px}
.chip[aria-pressed="true"]{background:var(--accent); color:var(--accent-ink); border-color:transparent}
.layer{border:1px solid var(--line); border-radius:12px; padding:10px 12px; margin-bottom:10px}
.layer h3{font-size:13px; margin:0; color:var(--muted); font-weight:600}
.spacings{display:grid; grid-template-columns:1fr 1fr; gap:8px; padding-top:6px}
.share{padding-top:8px}
.share span{font-size:12px}

.foot{color:var(--muted); font-size:13px; padding-bottom:30px; display:flex; flex-wrap:wrap; gap:6px 18px; justify-content:space-between}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace; font-size:12px}
#model-pic svg{width:100%; height:auto; display:block}