:root{--bg:#fff;--fg:#1a1d23;--muted:#4b5563;--line:#d7dbe2;--card:#f5f7fa;--accent:#0b5fd0;--accent-fg:#fff;--err:#a4161a;--focus:#ff9f1c}
@media (prefers-color-scheme:dark){:root{--bg:#12151a;--fg:#eceff4;--muted:#aab2bf;--line:#2c323c;--card:#1b2028;--accent:#6aa9ff;--accent-fg:#0b1220;--err:#ff8b8e}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-fg);padding:.5rem 1rem;z-index:10}
.skip:focus{left:0}
.wrap{max-width:60rem;margin:0 auto;padding:0 16px}
header.site{border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;align-items:center;justify-content:space-between;padding-top:.75rem;padding-bottom:.75rem}
.brand{font-weight:700;text-decoration:none;color:var(--fg)}
nav ul{display:flex;flex-wrap:wrap;gap:.25rem 1rem;list-style:none;margin:0;padding:0}
main{padding:1.5rem 0 3rem}
h1{font-size:1.9rem;line-height:1.25;margin:.2rem 0 .6rem}
h2{font-size:1.3rem;margin:2rem 0 .6rem}
.lead{color:var(--muted);font-size:1.05rem;max-width:42rem}
.grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));list-style:none;padding:0;margin:1rem 0}
.card{border:1px solid var(--line);background:var(--card);border-radius:10px;padding:14px 16px;height:100%}
a.card-link{text-decoration:none;color:inherit;display:block;height:100%}
a.card-link:hover .card{border-color:var(--accent)}
.card h3{margin:0 0 .3rem;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.95rem}
.tool{border:1px solid var(--line);border-radius:10px;padding:16px;margin:1rem 0;background:var(--card)}
label{display:block;font-weight:600;margin:.6rem 0 .25rem}
textarea,input[type=text],input[type=number],select{width:100%;font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--muted);border-radius:6px;padding:.55rem}
textarea{min-height:9rem;resize:vertical}
.row{display:flex;flex-wrap:wrap;gap:8px;margin-top:.8rem}
button{font:inherit;cursor:pointer;border-radius:6px;padding:.55rem 1.1rem;border:1px solid var(--accent);background:var(--accent);color:var(--accent-fg);min-height:44px}
button.secondary{background:transparent;color:var(--accent)}
.result{margin-top:1rem}
.result dl{display:grid;grid-template-columns:max-content 1fr;gap:.25rem 1rem;margin:0}
.result dt{color:var(--muted)}
.result dd{margin:0;font-weight:600}
.out-text{white-space:pre-wrap;word-break:break-word;font:inherit;margin:0}
.error{color:var(--err);font-weight:600}
details{border-top:1px solid var(--line);padding:.6rem 0}
summary{cursor:pointer;font-weight:600}
footer.site{border-top:1px solid var(--line);padding:1.5rem 0;color:var(--muted);font-size:.9rem}
footer.site ul{list-style:none;display:flex;flex-wrap:wrap;gap:.25rem 1rem;padding:0;margin:0 0 .6rem}
.notice{border-left:4px solid var(--accent);padding:.5rem .9rem;background:var(--card)}
@media (max-width:480px){h1{font-size:1.55rem}.result dl{grid-template-columns:1fr}}

/* ---- planner tools (forms, results, project plan, feedback widget) ---- */
:root{--warn:#7a4b00;--ok:#13663a}
@media (prefers-color-scheme:dark){:root{--warn:#ffcf70;--ok:#7fdca5}}
[hidden]{display:none!important}
.sr-only,.offscreen{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
fieldset{border:1px solid var(--line);border-radius:8px;margin:.8rem 0;padding:.6rem 1rem 1rem;min-width:0}
legend{font-weight:700;padding:0 .4rem}
.fields{display:grid;gap:4px 16px;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr))}
.field{min-width:0}
.hint{color:var(--muted);font-size:.9rem;margin:.2rem 0 0}
.choices{display:flex;flex-wrap:wrap;gap:4px 18px}
label.choice{display:flex;align-items:center;gap:.5rem;font-weight:400;min-height:44px;margin:0}
input[type=checkbox],input[type=radio]{width:1.15rem;height:1.15rem;flex:none}
.status{min-height:1.4em;margin:.4rem 0;color:var(--muted)}
.status.error,.error{color:var(--err)}
button.primary{font-weight:700}
button:disabled{opacity:.55;cursor:not-allowed}
.actions{margin:.4rem 0 .2rem}
.planner-result{margin-top:1.2rem;border-top:1px solid var(--line);padding-top:.8rem}
.cards{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(9.5rem,1fr));margin:.6rem 0}
.stat{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;background:var(--bg);padding:.6rem .8rem}
.stat-label{color:var(--muted);font-size:.85rem}
.stat-value{font-size:1.7rem;font-weight:800;line-height:1.2}
.stat-sub{color:var(--muted);font-size:.85rem}
.warn{border-left:4px solid var(--warn);padding:.4rem .8rem;background:var(--bg);color:var(--warn);font-weight:600}
.note{border-left:4px solid var(--accent);padding:.4rem .8rem;background:var(--bg)}
.table-wrap{overflow-x:auto;margin:.5rem 0}
table{border-collapse:collapse;width:100%;font-size:.95rem}
caption{text-align:left;font-weight:600;color:var(--muted);padding:.3rem 0}
th,td{border-bottom:1px solid var(--line);padding:.4rem .6rem;text-align:left;vertical-align:top}
th.num,td.num{text-align:right;font-variant-numeric:tabular-nums}
.diagram{margin:.8rem 0}
.diagram svg{max-width:100%;height:auto;border:1px solid var(--line);border-radius:6px;background:#fff}
figcaption{color:var(--muted);font-size:.9rem}
.assumptions ol{padding-left:1.3rem}
.assumptions li{margin:.3rem 0}
.src{color:var(--muted);font-size:.85rem}
.project{margin-top:1.4rem;border-top:1px dashed var(--line);padding-top:.6rem}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip-title{font-weight:600;margin:.2rem 0}
button.chip{border-radius:999px;background:transparent;color:var(--accent)}
.run-rows,.stock-rows{display:grid;gap:8px}
.run-row{display:grid;gap:4px 12px;grid-template-columns:repeat(auto-fit,minmax(10rem,1fr));align-items:end;border:1px solid var(--line);border-radius:8px;padding:.5rem .7rem;background:var(--bg)}
.stock-rows{grid-template-columns:repeat(auto-fit,minmax(8rem,1fr))}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.feedback{margin-top:1rem}
.feedback pre{max-height:14rem;overflow:auto;background:var(--bg);border:1px solid var(--line);padding:.5rem;border-radius:6px}
.report-row{margin:.4rem 0}
@media (max-width:480px){.stat-value{font-size:1.45rem}.fields{grid-template-columns:1fr}}
@media print{header.site,footer.site,.actions,.report-row,#feedback,.chips,form.planner,nav{display:none!important}body{background:#fff;color:#000}}