:root{--ink:#152e35;--muted:#687b80;--paper:#f5f6f2;--line:#dde4df;--accent:#d9ef97;--warn:#a36824;--warnbg:#fbf1df;--bad:#a3332b;--badbg:#fbe6e3;--white:#fff;--radius:12px}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
button,input,select{font:inherit;color:inherit}
[hidden]{display:none!important}
h1,h2{margin:0;font-weight:600}h2{font-size:15px}

.top{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;background:var(--ink);color:#fff}
.brand{display:flex;gap:10px;align-items:center;color:#fff;text-decoration:none;font-weight:600}
.logo{height:36px;width:auto;display:block}
.brand-divider{width:1px;height:22px;background:#4a6369}
.top-tools{display:flex;gap:18px;align-items:center;font-size:13px}
.top-tools a{color:#c9d6d2}
.lang{display:flex;gap:6px;align-items:center}.lang select{background:#244148;color:#fff;border:0;border-radius:6px;padding:3px 6px}

.layout{display:grid;grid-template-columns:200px minmax(0,1fr);min-height:calc(100vh - 48px)}
.parts{border-right:1px solid var(--line);padding:16px 12px;background:#eef1ec;display:flex;flex-direction:column;gap:6px}
.parts-head{display:flex;justify-content:space-between;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:0 6px 6px}
#part-list button{display:block;width:100%;text-align:left;border:0;background:none;padding:8px 10px;border-radius:8px;cursor:pointer;font-weight:500}
#part-list button:hover{background:#e2e8e2}
#part-list button[aria-current="true"]{background:var(--ink);color:#fff}
#part-list small{display:block;font-weight:400;font-size:11px;opacity:.7}
.new-form{display:flex;flex-direction:column;gap:8px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:10px;font-size:12px}
.new-form label{display:flex;flex-direction:column;gap:3px}

main{display:grid;grid-template-columns:minmax(0,1fr) minmax(380px,520px);gap:16px;padding:16px;align-items:start}
.welcome{padding:60px 40px;color:var(--muted)}.welcome h1{color:var(--ink);font-size:22px;margin-bottom:6px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.card-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.work{display:flex;flex-direction:column;gap:16px}
.drawing{position:sticky;top:16px}

.viewport{height:calc(100vh - 200px);min-height:360px;overflow:hidden;border-radius:8px;background:#e9ece8;cursor:grab;position:relative;touch-action:none}
.viewport.dragging{cursor:grabbing}
.viewport img{position:absolute;left:0;top:0;transform-origin:0 0;user-select:none;-webkit-user-drag:none;max-width:none}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.tabs button{border:1px solid var(--line);background:var(--paper);border-radius:999px;padding:3px 10px;font-size:12px;cursor:pointer}
.tabs button[aria-pressed="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.zoom{display:flex;gap:4px}
.empty{padding:40px;color:var(--muted);text-align:center}

.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 12px}
.grid label{display:flex;flex-direction:column;gap:3px;font-size:12px;color:var(--muted)}
.grid .span2{grid-column:span 2}
.fields{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
input,select{border:1px solid #c9d3cf;border-radius:8px;padding:7px 9px;background:#fff;color:var(--ink);font-size:14px;min-width:0}
input:focus,select:focus{outline:2px solid #9fbf55;border-color:transparent}
input.invalid{border-color:var(--bad);background:var(--badbg)}

.btn{border:1px solid #c9d3cf;background:#fff;border-radius:8px;padding:7px 14px;cursor:pointer;font-weight:500}
.btn:hover{background:var(--paper)}
.btn.primary{background:var(--ink);color:#fff;border-color:var(--ink)}.btn.primary:hover{background:#244148}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.small{padding:3px 10px;font-size:12px}
.btn.wide{width:100%;margin-top:8px}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:8px}
.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:12px}
.muted{color:var(--muted)}.small{font-size:12px}
.pill{font-size:11px;border-radius:999px;padding:2px 9px}
.pill.dirty{background:var(--warnbg);color:var(--warn)}.pill.clean{background:#eaf3d4;color:#4c6418}
.banner{background:var(--warnbg);color:var(--warn);border-radius:8px;padding:8px 10px;font-size:12px;margin:0 0 10px}
.hint{font-size:12px;color:var(--muted);margin:8px 0}

.preview{width:100%;height:300px;background:#fbfcfa;border:1px solid var(--line);border-radius:8px}
.preview .part{fill:#e4efc4;stroke:var(--ink);stroke-width:1.4;fill-rule:evenodd}
.preview .dim{stroke:#7b8f94;stroke-width:1}
.preview text{fill:var(--ink);font-family:inherit}
.problems{margin:10px 0 0;padding:8px 10px 8px 28px;background:var(--badbg);color:var(--bad);border-radius:8px;font-size:13px}
.results{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0 0}
.results div{background:var(--paper);border-radius:8px;padding:8px 10px}
.results dt{font-size:11px;color:var(--muted)}.results dd{margin:0;font-size:17px;font-weight:600}
.results .big{grid-column:span 2;background:#eaf3d4}.results .big dd{font-size:22px}

.cost{width:100%;border-collapse:collapse;font-size:13px;font-variant-numeric:tabular-nums}
.cost th{font-size:11px;color:var(--muted);font-weight:500;text-align:right;padding:4px 6px}
.cost td{padding:5px 6px;border-top:1px solid var(--line);text-align:right;white-space:nowrap}
.cost td:first-child{text-align:left;color:var(--muted);white-space:normal}
.cost td small{display:block;font-size:11px;color:var(--muted)}
.cost tr.total td{font-weight:600;color:var(--ink)}
.cost tr.big td{background:#eaf3d4;font-size:17px;font-weight:600;color:var(--ink)}
.cost tr.credit td:not(:first-child){color:#4c6418}
.currency{display:flex;gap:8px;align-items:center}.currency select{padding:3px 6px;font-size:13px}
#edit-prices{margin-top:4px}
.settings-btn{background:#244148;color:#fff;border:0;border-radius:6px;padding:4px 10px;cursor:pointer;font-size:13px}
.settings-btn:hover{background:#2f535b}
.settings{width:min(980px,calc(100vw - 32px));max-height:calc(100vh - 40px);padding:0;border:0;border-radius:var(--radius);color:var(--ink);display:none;flex-direction:column}
.settings[open]{display:flex}
.settings::backdrop{background:rgba(21,46,53,.45)}
.settings-head,.settings-foot{display:flex;align-items:center;gap:10px;padding:14px 18px}
.settings-head{justify-content:space-between;border-bottom:1px solid var(--line)}
.settings-foot{justify-content:flex-end;border-top:1px solid var(--line)}.settings-foot span{margin-right:auto}
.settings-tabs{padding:12px 18px 0;margin:0}
.settings-body{padding:8px 18px 16px;overflow:auto}
.settings h3{font-size:13px;margin:20px 0 0}
.table-wrap{overflow-x:auto}
.edit-table{width:100%;border-collapse:collapse;font-size:12px;margin:8px 0}
.edit-table.narrow{max-width:420px}
.edit-table th{text-align:left;font-weight:500;color:var(--muted);padding:2px 4px;white-space:nowrap}
.edit-table td{padding:3px 4px;vertical-align:middle}
.edit-table input,.edit-table select{width:100%;min-width:72px;padding:5px 7px;font-size:13px}
.edit-table .size{display:flex;gap:4px;align-items:center}.edit-table .size input{width:70px}
.edit-table .calc{color:var(--muted);white-space:nowrap;text-align:right}
.edit-table .remove{border:0;background:none;color:var(--muted);cursor:pointer;font-size:16px;padding:2px 6px}
.edit-table .remove:hover{color:var(--bad)}
label.inline{display:flex;gap:8px;align-items:center;font-size:12px;color:var(--muted);margin:8px 0}
.warn{color:var(--warn)}

.unfold summary{cursor:pointer;list-style:none}.unfold summary::-webkit-details-marker{display:none}
.unfold summary h2::before{content:"▸ ";color:var(--muted)}.unfold[open] summary h2::before{content:"▾ "}
.unfold[open] summary{margin-bottom:12px}
.seg{display:flex;gap:16px;margin-bottom:10px;font-size:13px}
.chain{display:flex;flex-direction:column;gap:6px;margin-top:6px}
.chain .link{display:grid;grid-template-columns:110px 1fr 1fr;gap:8px;align-items:center;font-size:12px;color:var(--muted)}
.chain .link.bend{padding-left:24px;grid-template-columns:86px 1fr 1fr}
.unfold-result{margin-top:12px;font-size:13px}
.unfold-result strong{font-size:20px;display:block;color:var(--ink)}
.unfold-result.error{color:var(--bad)}

@media(max-width:1100px){main{grid-template-columns:1fr}.drawing{position:static}.viewport{height:55vh}}
@media(max-width:700px){.layout{grid-template-columns:1fr}.parts{border-right:0;border-bottom:1px solid var(--line)}main{padding:12px}.grid{grid-template-columns:1fr}.grid .span2{grid-column:auto}}
.banner.err{background:var(--badbg);color:var(--bad)}
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px;box-sizing:border-box;background:var(--ink)}
.login-card{width:100%;max-width:340px;display:flex;flex-direction:column;gap:12px;padding:24px}
.login-card h1{font-size:18px;margin:0}
.login-card label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted)}
.login-logo{height:40px;align-self:flex-start;background:var(--ink);border-radius:8px;padding:6px 10px}
.logout{display:flex;gap:8px;align-items:center;margin:0;color:#c9d6d2}
.fields.contour{display:block}
.contour-head{display:flex;justify-content:space-between;align-items:center;margin:14px 0 6px;font-weight:600;font-size:13px}
.contour-row{display:grid;grid-template-columns:26px minmax(150px,1.7fr) repeat(3,minmax(0,1fr)) 34px;gap:6px 8px;align-items:end;margin-bottom:8px}
.contour-row label{display:flex;flex-direction:column;gap:3px;font-size:11px;color:var(--muted)}
.contour-row .remove{grid-column:-2;padding:7px 0}
.seg-no{font-weight:600;color:var(--warn);padding-bottom:9px;font-size:12px}
.preview .start{fill:var(--warn)}
.preview text.seg-mark{fill:var(--warn);font-weight:700;stroke:#fff;paint-order:stroke}
@media(max-width:700px){.contour-row{grid-template-columns:28px 1fr 1fr 34px}.contour-row select{grid-column:2 / span 2}.contour-row .remove{grid-row:1}}