:root {
  --paper: #FBFCFD;
  --ink: #1D2731;
  --ink-2: #51606E;
  --steel: #2E5A87;
  --steel-dark: #224569;
  --line: #D3DAE1;
  --panel: #EDF1F5;
  --signal: #F2C200;
  --red: #B3261E;
  --green: #2E7D4F;
  --sans: "IBM Plex Sans", "Segoe UI", Arial, sans-serif;
  --mono: "IBM Plex Mono", Consolas, monospace;
}
* { box-sizing: border-box; }
html { font-size: 15px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.45; }
a { color: var(--steel); }
a:hover { color: var(--steel-dark); }
:focus-visible { outline: 2px solid var(--steel); outline-offset: 2px; }
h1 { font-size: 1.6rem; font-weight: 600; margin: 0 0 .3rem; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; font-weight: 600; margin: 0 0 .8rem; }
.muted { color: var(--ink-2); }
.small { font-size: .85rem; }
.mono { font-family: var(--mono); font-size: .88rem; }
.warn-text { color: var(--red); }

/* верхняя панель */
.top { display: flex; align-items: center; gap: 2rem; padding: .6rem 1.5rem; background: var(--ink); color: #fff; flex-wrap: wrap; }
.top a { color: #fff; text-decoration: none; }
.brand { font-weight: 600; display: flex; align-items: center; gap: .6rem; }
.brand-mark { font-family: var(--mono); background: var(--signal); color: var(--ink); padding: .1rem .4rem; border-radius: 2px; font-size: .85rem; }
.top nav { display: flex; gap: 1.2rem; }
.top nav a { opacity: .85; } .top nav a:hover { opacity: 1; text-decoration: underline; }
.who { margin-left: auto; display: flex; align-items: center; gap: 1rem; font-size: .9rem; }
.who small { opacity: .7; margin-left: .3rem; }
.who form { margin: 0; }
button.link { background: none; border: 0; color: #fff; cursor: pointer; font: inherit; padding: 0; text-decoration: underline; }

/* страницы */
.page { max-width: 1180px; margin: 0 auto; padding: 1.5rem; }
.wide-page { max-width: 1600px; }
.page-head { margin-bottom: 1.2rem; }
.narrow { max-width: 460px; margin: 2rem auto; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 4px; padding: 1.1rem 1.2rem; margin-bottom: 1.2rem; }
.flash { padding: .7rem 1rem; border-radius: 3px; margin-bottom: 1rem; border-left: 4px solid var(--steel); background: var(--panel); }
.flash-error { border-color: var(--red); background: #FBEDEC; }
.flash-ok { border-color: var(--green); background: #EAF4EE; }
.notice { padding: .7rem 1rem; background: var(--panel); border-left: 4px solid var(--steel); margin: 0 0 1rem; }
.notice-warn { border-color: var(--red); background: #FBEDEC; }

/* формы */
label { display: flex; flex-direction: column; gap: .25rem; font-size: .85rem; color: var(--ink-2); }
input, select, textarea { font: inherit; color: var(--ink); border: 1px solid #B9C3CD; border-radius: 3px; padding: .45rem .55rem; background: #fff; min-width: 0; }
input:focus, select:focus, textarea:focus { border-color: var(--steel); outline: none; box-shadow: 0 0 0 2px rgba(46,90,135,.2); }
.row-form { display: flex; gap: .8rem; align-items: flex-end; flex-wrap: wrap; }
.row-form label { min-width: 160px; }
.row-form .grow { flex: 1; }
.stack { display: flex; flex-direction: column; gap: .8rem; }
.row { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.inline { display: flex; gap: .4rem; margin: 0; }
input.short { width: 9rem; }
.btn { display: inline-block; font: inherit; font-size: .92rem; font-weight: 500; padding: .45rem .9rem; border-radius: 3px; border: 1px solid #B9C3CD; background: #fff; color: var(--ink); cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn:hover { background: var(--panel); color: var(--ink); }
.btn.primary { background: var(--steel); border-color: var(--steel); color: #fff; }
.btn.primary:hover { background: var(--steel-dark); }
.btn.danger { color: var(--red); border-color: #E3B9B6; }
.btn.small { font-size: .82rem; padding: .3rem .6rem; }
.btn.wide { width: 100%; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.push-right { margin-left: auto; }

/* вход */
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 1rem; background: var(--panel); }
.login-card { width: min(400px, 100%); background: #fff; border: 1.5px solid var(--ink); padding: 0 1.6rem 1.6rem; }
.login-card form { display: flex; flex-direction: column; gap: .9rem; margin-top: 1.2rem; }
.stamp-mini { display: grid; grid-template-columns: auto 1fr auto; border-bottom: 1.5px solid var(--ink); margin: 0 -1.6rem 1.4rem; font-family: var(--mono); font-size: .8rem; }
.stamp-mini span { padding: .4rem .7rem; border-right: 1px solid var(--ink); }
.stamp-mini span:last-child { border-right: 0; }
.stamp-mini span:first-child { background: var(--signal); font-weight: 500; }

/* таблицы */
.table-wrap { overflow-x: auto; }
table.grid { width: 100%; border-collapse: collapse; background: #fff; font-size: .9rem; }
.grid th { text-align: left; font-weight: 500; color: var(--ink-2); font-size: .8rem; padding: .5rem .6rem; border-bottom: 1.5px solid var(--ink); background: #fff; position: sticky; top: 0; }
.grid td { padding: .5rem .6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.grid tr.off td { color: #99A4AE; }
.grid .num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.grid.compact td { padding: .3rem .6rem; font-size: .82rem; }
.empty { color: var(--ink-2); text-align: center; padding: 2rem !important; }
.st { display: inline-block; font-size: .8rem; padding: .08rem .45rem; border-radius: 2px; background: var(--panel); white-space: nowrap; font-style: normal; }
.st-review { background: var(--signal); color: var(--ink); }
.st-approved { background: #DDEFE3; color: var(--green); }
.st-returned { background: #FBEDEC; color: var(--red); }

/* руководитель */
.team { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: .8rem; margin-bottom: 1.2rem; }
.team-card { display: flex; flex-direction: column; gap: .2rem; padding: .8rem 1rem; background: #fff; border: 1px solid var(--line); border-radius: 4px; text-decoration: none; color: var(--ink); }
.team-card:hover, .team-card.active { border-color: var(--steel); }
.team-card.active { box-shadow: inset 3px 0 0 var(--steel); }
.counts { font-size: .85rem; }
.filters { display: flex; gap: 1rem; align-items: flex-end; margin-bottom: .8rem; }

/* штамп сметы — чертёжная основная надпись */
.stamp { display: grid; grid-template-columns: 2.2fr 2.2fr 1.4fr 1fr .7fr 1fr; border: 1.5px solid var(--ink); background: #fff; margin-bottom: 1rem; }
.stamp-cell { padding: .45rem .7rem; border-right: 1px solid var(--ink); display: flex; flex-direction: column; gap: .1rem; min-width: 0; }
.stamp-cell:last-child { border-right: 0; }
.stamp-cell > span { font-size: .72rem; color: var(--ink-2); }
.stamp-cell strong { font-weight: 500; overflow-wrap: anywhere; }
.s-title strong { font-size: 1.15rem; font-weight: 600; }
.toolbar { display: flex; gap: .6rem; align-items: flex-start; flex-wrap: wrap; margin-bottom: 1rem; }
.toolbar form { margin: 0; }
.meta-edit summary { list-style: none; }
.meta-edit summary::-webkit-details-marker { display: none; }
.meta-edit[open] { flex-basis: 100%; order: 10; }
.meta-edit[open] .row-form { margin-top: .6rem; }
.review { border-left: 4px solid var(--signal); }

/* рабочая область */
.workspace { display: grid; grid-template-columns: minmax(0, 1fr) 390px; gap: 1rem; align-items: start; }
.workspace.readonly { grid-template-columns: minmax(0, 1fr) 340px; }
.sheet { background: #fff; border: 1px solid var(--line); border-radius: 4px; padding: .3rem .3rem .8rem; }
.positions td.code { white-space: nowrap; color: var(--steel-dark); }
.positions .section-row td { background: var(--panel); font-weight: 600; font-size: .85rem; }
.qty-input { width: 6.5rem; text-align: right; padding: .25rem .4rem; }
.unit { color: var(--ink-2); font-size: .82rem; }
.wide-input { width: 100%; padding: .25rem .4rem; font-size: .82rem; margin-bottom: .2rem; }
.icon-btn { background: none; border: 0; color: var(--ink-2); cursor: pointer; font-size: .95rem; padding: .2rem .4rem; border-radius: 3px; }
.icon-btn:hover { color: var(--red); background: #FBEDEC; }
.add-manual { margin: .8rem .5rem 0; }
.add-manual summary { cursor: pointer; color: var(--steel); font-size: .9rem; }
.add-manual form { margin-top: .6rem; }

.chat { background: #fff; border: 1px solid var(--line); border-radius: 4px; display: flex; flex-direction: column; height: calc(100vh - 150px); min-height: 460px; position: sticky; top: 1rem; }
.chat-head { padding: .6rem .9rem; border-bottom: 1px solid var(--line); font-weight: 600; }
.chat-log { flex: 1; overflow-y: auto; padding: .8rem; display: flex; flex-direction: column; gap: .6rem; }
.msg { padding: .55rem .75rem; border-radius: 4px; white-space: pre-wrap; font-size: .9rem; max-width: 95%; overflow-wrap: anywhere; }
.msg-user { background: var(--steel); color: #fff; align-self: flex-end; max-height: 14rem; overflow-y: auto; }
.msg-assistant { background: var(--panel); }
.msg-hint { color: var(--ink-2); font-size: .88rem; }
.msg-wait { color: var(--ink-2); font-style: italic; }
.msg-error { background: #FBEDEC; color: var(--red); }
.chat-form { border-top: 1px solid var(--line); padding: .7rem; display: flex; flex-direction: column; gap: .5rem; }
.chat-form textarea { resize: vertical; }
.file { flex-direction: row; align-items: center; cursor: pointer; color: var(--steel); }
.file input { width: 1px; height: 1px; opacity: 0; position: absolute; }
.file:focus-within { outline: 2px solid var(--steel); }

@media (max-width: 1000px) {
  .workspace, .workspace.readonly { grid-template-columns: 1fr; }
  .chat { position: static; height: 70vh; }
  .stamp { grid-template-columns: 1fr 1fr; }
  .stamp-cell { border-bottom: 1px solid var(--ink); }
  .who { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

/* медиа и обучение */
.thumbs { display: grid; grid-template-columns: repeat(3, 1fr); gap: .3rem; margin-top: .5rem; }
.thumbs img, .thumbs video { width: 100%; height: 84px; object-fit: cover; border-radius: 3px; display: block; background: #000; }
.thumbs video { grid-column: span 3; height: 160px; }
.who-ai { display: block; font-size: .72rem; color: var(--ink-2); margin-bottom: .2rem; }
.provider { font-size: .85rem; padding: .3rem .4rem; }
.teach { border-top: 1px solid var(--line); padding: .5rem .7rem .7rem; }
.teach summary { cursor: pointer; color: var(--steel); font-size: .88rem; }
.teach form { margin-top: .5rem; }
.learn-stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1.5px solid var(--ink); background: #fff; margin-bottom: 1.2rem; }
.learn-stats div { padding: .7rem 1rem; border-right: 1px solid var(--ink); display: flex; flex-direction: column; }
.learn-stats div:last-child { border-right: 0; }
.learn-stats b { font-size: 1.6rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.learn-stats span { font-size: .82rem; color: var(--ink-2); }
@media (max-width: 700px) { .learn-stats { grid-template-columns: 1fr; } .learn-stats div { border-right: 0; border-bottom: 1px solid var(--ink); } }
.grid td.mono { white-space: nowrap; }
.file { border: 1px dashed var(--steel); border-radius: 3px; padding: .3rem .6rem; font-size: .85rem; }
.file:hover { background: var(--panel); }
.learn-stats.two { grid-template-columns: repeat(2, 1fr); }
.learn-stats a { color: inherit; }
.file.drop { padding: .9rem 1rem; align-self: flex-start; }
ul.plain { list-style: none; padding: 0; margin: 0 0 .5rem; }
ul.plain li { padding: .2rem 0; }
.drv-panel { border-left: 4px solid var(--steel); }
label.check { flex-direction: row; align-items: center; gap: .4rem; min-width: auto !important; color: var(--ink); }
.job { padding: .8rem 1rem; border: 1.5px solid var(--ink); background: #fff; margin-bottom: 1rem; display: flex; gap: .8rem; align-items: center; }
.job .spinner { width: 14px; height: 14px; border: 2px solid var(--line); border-top-color: var(--steel); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .job .spinner { animation: none; } }
.report { border-left: 4px solid var(--steel); }
.report .sev-высокая { color: var(--red); font-weight: 600; }
.report .sev-средняя { color: #8a6100; }
.report table td { vertical-align: top; }
.file-list { list-style: none; padding: 0; margin: .25rem 0 0; }
.file-list li { padding: .15rem 0; }

.req-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: .6rem 1rem; }
.req-grid label { display: flex; flex-direction: column; gap: .2rem; font-size: .9rem; }