:root{
  --bg:#f4f2ee; --card:#ffffff; --ink:#1d2329; --ink2:#5b6670; --line:#dcd8d0; --line2:#ebe8e2;
  --acc:#a4551f; --acc-ink:#ffffff; --acc-soft:#f6e9df; --ok:#2f7a4b; --warn:#a46a00; --bad:#b23a32;
  --warn-soft:#fff4dc; --bad-soft:#fbe6e4; --ok-soft:#e5f2ea;
  --mono:ui-monospace,"Cascadia Mono",Consolas,monospace;
  --e1:#c0562b; --e2:#2f8a57; --e3:#7a4fb3; --e4:#b48a12; --cut:#c23a6b;
  --hole-a:#1f6a86; --hole-b:#c0562b; --hole-e:#2f8a57;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--acc)}
h1{font-size:22px;margin:0 0 4px}h2{font-size:17px;margin:0 0 12px}h3{font-size:15px;margin:16px 0 8px}
.muted{color:var(--ink2)}.small{font-size:13px}.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.mono{font-family:var(--mono)}

/* шапка */
.top{position:sticky;top:0;z-index:5;background:#20262c;color:#e9e6e0;display:flex;align-items:center;gap:20px;padding:0 20px;height:54px}
.brand{font-weight:650;letter-spacing:.2px;white-space:nowrap}.brand b{color:#e7a46c}
.nav{display:flex;gap:4px;flex:1;overflow-x:auto}
.nav a{color:#c9c4bb;text-decoration:none;padding:7px 12px;border-radius:6px;white-space:nowrap}
.nav a:hover{background:#2e363e;color:#fff}.nav a.on{background:#3a434c;color:#fff}
.who{font-size:13px;color:#b8b2a8;white-space:nowrap}.who button{margin-left:10px}

main{max-width:1240px;margin:0 auto;padding:24px 20px 60px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px 20px;margin-bottom:16px}
.row{display:flex;gap:16px;flex-wrap:wrap;align-items:flex-start}.row>*{flex:1 1 280px}
.head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:16px}

/* кнопки и поля */
button,.btn{font:inherit;border:1px solid var(--line);background:#fff;color:var(--ink);padding:7px 14px;border-radius:7px;cursor:pointer;text-decoration:none;display:inline-block}
button:hover,.btn:hover{border-color:#b9b3a8}
button.pri,.btn.pri{background:var(--acc);border-color:var(--acc);color:var(--acc-ink)}button.pri:hover{filter:brightness(1.07)}
button.link{border:none;background:none;color:var(--acc);padding:2px 4px}
button.dark{background:transparent;color:#c9c4bb;border-color:#48525c;padding:4px 10px;font-size:13px}
button:disabled{opacity:.5;cursor:default}
input,select{font:inherit;padding:7px 10px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--ink);width:100%}
input:focus,select:focus{outline:2px solid #e8c2a3;border-color:var(--acc)}
label{display:block;font-size:13px;color:var(--ink2);margin:0 0 10px}label>input,label>select{margin-top:4px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:0 14px}

/* таблицы */
.tbl-wrap{overflow-x:auto}
table{border-collapse:collapse;width:100%}
th{font-size:12px;font-weight:600;color:var(--ink2);text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:8px 10px;border-bottom:1px solid var(--line2);vertical-align:top}
tr.grp td{background:#f8f6f2;font-weight:600;font-size:13px}
tr.total td{font-weight:700;border-top:2px solid var(--ink);border-bottom:none;font-size:16px}
tr.click{cursor:pointer}tr.click:hover td{background:#faf8f4}
tr.open td{background:#faf6f1}
.tag{display:inline-block;font-size:12px;padding:1px 8px;border-radius:20px;background:#eeebe5;color:var(--ink2);white-space:nowrap}
.tag.ok{background:var(--ok-soft);color:var(--ok)}.tag.warn{background:var(--warn-soft);color:var(--warn)}.tag.bad{background:var(--bad-soft);color:var(--bad)}
.price-in{width:120px;text-align:right}
td.missing{color:var(--warn)}

/* загрузка */
.drop{border:2px dashed #c9c2b6;border-radius:12px;background:#fbfaf7;padding:40px 20px;text-align:center;cursor:pointer;transition:.15s}
.drop.over{border-color:var(--acc);background:var(--acc-soft)}
.drop b{display:block;font-size:17px;margin-bottom:4px}

/* сводка */
.kpis{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:14px}
.kpi{background:#f8f6f2;border-radius:8px;padding:10px 12px}.kpi span{display:block;font-size:12px;color:var(--ink2)}.kpi b{font-size:18px;font-variant-numeric:tabular-nums}
.big-total{font-size:28px;font-weight:700;font-variant-numeric:tabular-nums}
.notes{margin:12px 0 0;padding:0;list-style:none}.notes li{padding:8px 12px;border-radius:7px;margin-top:6px;font-size:14px}
.notes li.warn{background:var(--warn-soft)}.notes li.bad{background:var(--bad-soft)}.notes li.ok{background:var(--ok-soft)}

/* чертёж детали */
.panel-detail{display:grid;grid-template-columns:minmax(260px,1.2fr) 1fr;gap:20px;padding:6px 0}
@media (max-width:760px){.panel-detail{grid-template-columns:1fr}}
.drawing{background:#fff;border:1px solid var(--line2);border-radius:8px;width:100%;height:auto;max-height:440px}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12px;color:var(--ink2);margin-top:6px}
.legend i{display:inline-block;width:14px;height:3px;vertical-align:middle;margin-right:5px}

/* вход */
.login{max-width:380px;margin:12vh auto;padding:0 16px}
.login .card{padding:26px}
.err{color:var(--bad);font-size:14px;min-height:20px;margin:4px 0 10px}
.toast{position:fixed;right:20px;bottom:20px;background:#20262c;color:#fff;padding:10px 16px;border-radius:8px;opacity:0;transform:translateY(8px);transition:.2s;pointer-events:none;max-width:420px;z-index:20}
.toast.show{opacity:1;transform:none}.toast.bad{background:var(--bad)}
.spin{display:inline-block;width:16px;height:16px;border:2px solid #ddd;border-top-color:var(--acc);border-radius:50%;animation:s 1s linear infinite;vertical-align:-3px;margin-right:8px}
@keyframes s{to{transform:rotate(360deg)}}
@media (max-width:640px){.top{gap:10px;padding:0 12px}.who span{display:none}main{padding:16px 12px 40px}}

/* результат расчёта — как в «Раскладе операций по модели» */
.res-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,460px);gap:16px;align-items:start;margin-bottom:16px}
.res-head>.card{margin-bottom:0}
@media (max-width:900px){.res-head{grid-template-columns:1fr}}
.eyebrow{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink2);margin-bottom:4px}
.facts{display:flex;flex-wrap:wrap;gap:6px 24px;font-size:14px;color:var(--ink2);margin-top:6px}
.facts b{color:var(--ink);font-family:var(--mono);font-weight:500}
.total-line{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-top:14px;padding-top:12px;border-top:1px solid var(--line2)}
.viewer{margin:0;display:flex;flex-direction:column;gap:8px;padding:12px}
.v3d{width:100%;aspect-ratio:4/3.4;background:#fbfaf7;border:1px solid var(--line2);border-radius:8px;overflow:hidden;touch-action:none}
.v3d canvas{display:block;width:100%!important;height:100%!important}
.viewer figcaption{display:flex;gap:12px;align-items:center;justify-content:space-between;font-size:12px;color:var(--ink2)}
.small-btn{padding:4px 10px;font-size:13px;white-space:nowrap}
tfoot td{font-weight:700;border-top:2px solid var(--ink);border-bottom:none;font-size:16px}
.catbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;padding:10px 14px;background:#f8f6f2;border-radius:8px;margin-bottom:10px}
.catbar .src{flex:1 1 320px;min-width:0}.catbar b{font-family:var(--mono);font-weight:500}
.sub{display:block;font-size:12px;color:var(--ink2)}
.matsum{display:flex;flex-wrap:wrap;gap:6px 24px;color:var(--ink2);margin-bottom:8px}.matsum b{color:var(--ink);font-family:var(--mono);font-weight:500}
td.tw{white-space:normal;min-width:180px;max-width:360px}
details.how{margin:10px 0;font-size:14px}details.how summary{cursor:pointer;color:var(--acc);font-weight:500}
details.how ol{margin:8px 0 0;padding-left:20px;display:flex;flex-direction:column;gap:4px}
code{font-family:var(--mono);font-size:13px;background:#eeebe5;padding:1px 5px;border-radius:4px}
.catfilter{width:min(360px,100%);margin:6px 0 10px}
.samples{margin-top:10px}
/* карточки деталей */
.legend{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px;color:var(--ink2);margin-bottom:12px}
.legend span{display:inline-flex;align-items:center;gap:6px}
.sw{width:18px;height:4px;border-radius:2px;display:inline-block}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px}
.pcard{border:1px solid var(--line);border-radius:8px;padding:14px;display:flex;flex-direction:column;gap:10px;min-width:0;cursor:pointer;background:#fff}
.pcard:hover{border-color:#b9b3a8}.pcard.sel{border-color:#1f6a86;box-shadow:0 0 0 2px #d8e8ee}
.pcard:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.pcard h3{margin:0;font-size:15px;font-weight:600;display:flex;gap:10px;align-items:baseline}
.pos{font-family:var(--mono);font-size:13px;color:#1f6a86}
.meta{font-size:13px;color:var(--ink2)}.meta b{font-family:var(--mono);font-weight:500;color:var(--ink)}
svg.draw{width:100%;height:220px;background:#f8f6f2;border-radius:6px}
.oplist{display:grid;grid-template-columns:1fr auto;gap:2px 12px;font-size:13px}
.oplist .q{font-family:var(--mono);font-variant-numeric:tabular-nums;text-align:right}
.psum{display:flex;justify-content:space-between;border-top:1px solid var(--line2);padding-top:8px;font-size:14px}
@media (max-width:420px){.pgrid{grid-template-columns:1fr}}