:root{
    --paper:#f7f7f4; --paper-2:#ffffff; --ink:#1a1d23; --ink-soft:#4b505c; --muted:#7a8088;
    --line:#e3e2dc; --line-strong:#d3d2ca;
    --accent:#2f6fed; --accent-ink:#1c4bc4; --accent-soft:#e9f0fe;
    --warn:#c94f0a; --warn-soft:#fbe9db; --warn-ink:#8f3805;
    --code-bg:#eef0f2; --code-line:#d7dade;
    --shadow: 0 1px 2px rgba(20,20,20,.04), 0 6px 20px rgba(20,20,20,.05);
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --paper:#15171b; --paper-2:#1b1e24; --ink:#edeff2; --ink-soft:#c3c8d0; --muted:#8b909a;
      --line:#2a2d34; --line-strong:#383c45;
      --accent:#6f9dff; --accent-ink:#a9c3ff; --accent-soft:#1c2740;
      --warn:#e88a4e; --warn-soft:#3a2417; --warn-ink:#f3b686;
      --code-bg:#20232a; --code-line:#33373f;
      --shadow: 0 1px 2px rgba(0,0,0,.3), 0 6px 24px rgba(0,0,0,.35);
    }
  }
  :root[data-theme="dark"]{
    --paper:#15171b; --paper-2:#1b1e24; --ink:#edeff2; --ink-soft:#c3c8d0; --muted:#8b909a;
    --line:#2a2d34; --line-strong:#383c45;
    --accent:#6f9dff; --accent-ink:#a9c3ff; --accent-soft:#1c2740;
    --warn:#e88a4e; --warn-soft:#3a2417; --warn-ink:#f3b686;
    --code-bg:#20232a; --code-line:#33373f;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 6px 24px rgba(0,0,0,.35);
  }
  *{box-sizing:border-box}
  body{background:var(--paper); color:var(--ink); font-family:"IBM Plex Sans",system-ui,sans-serif; margin:0; line-height:1.55}
  a{color:var(--accent)}
  h1,h2{font-weight:700; text-wrap:balance; line-height:1.2}
  p{margin:.6em 0}
  code, .chip, .key{font-family:"IBM Plex Mono",ui-monospace,monospace}

  .chip{display:inline-block; background:var(--code-bg); border:1px solid var(--code-line); color:var(--ink); border-radius:5px; padding:.05em .45em; font-size:.86em; font-weight:600; white-space:nowrap}
  .key{display:inline-block; background:var(--paper-2); border:1px solid var(--line-strong); color:var(--ink-soft); border-radius:5px; padding:.05em .5em; font-size:.82em; font-weight:600; box-shadow:0 1px 0 var(--line-strong)}

  .page{max-width:760px; margin:0 auto; padding:max(28px, env(safe-area-inset-top,0px)) 20px 70px}

  header{border-bottom:1px solid var(--line); padding-bottom:22px; margin-bottom:28px}
  .eyebrow{color:var(--accent); font-weight:600; font-size:.82rem; letter-spacing:.06em; text-transform:uppercase}
  h1{font-size:clamp(1.5rem,4.5vw,2rem); margin:.25em 0 .2em}
  .lede{color:var(--ink-soft); max-width:56ch}
  .more-link{display:inline-flex; align-items:center; gap:.4em; margin-top:14px; font-size:.9rem; font-weight:600; text-decoration:none}
  .more-link:hover{text-decoration:underline}

  section{margin:30px 0}
  h2{font-size:1.2rem; display:flex; align-items:center; gap:.5em; margin-bottom:.6em}
  h2 .dot{width:8px; height:8px; border-radius:50%; background:var(--accent); flex:none}

  table{width:100%; border-collapse:collapse; font-size:.92rem}
  th,td{text-align:left; padding:7px 10px; border-bottom:1px solid var(--line); vertical-align:top}
  th{color:var(--muted); font-weight:600; font-size:.78rem; text-transform:uppercase; letter-spacing:.03em}
  .table-wrap{overflow-x:auto; border:1px solid var(--line); border-radius:10px; background:var(--paper-2)}
  .table-wrap table{margin:0}
  .table-wrap th:first-child, .table-wrap td:first-child{padding-left:14px}

  .type-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(210px,1fr)); gap:10px}
  .type-card{border:1px solid var(--line); background:var(--paper-2); border-radius:10px; padding:12px 14px; box-shadow:var(--shadow)}
  .type-card b{display:block; font-size:.96rem; margin-bottom:2px}
  .type-card span{color:var(--ink-soft); font-size:.86rem}

  .callout{border:1px solid var(--line); border-left:3px solid var(--accent); background:var(--accent-soft); border-radius:0 10px 10px 0; padding:12px 16px}
  .callout p{margin:.35em 0}
  .callout-title{font-weight:700; color:var(--accent-ink); font-size:.92rem; margin-bottom:.3em}

  ul.plain{padding-left:1.15em; margin:.6em 0}
  ul.plain li{margin:.3em 0}

  footer{color:var(--muted); font-size:.86rem; border-top:1px solid var(--line); padding-top:16px; margin-top:36px}

/* ===== Раздел «Помощь»: меню, метки типов, шаблоны (сессия 159) ===== */
.page.wide{max-width:900px}
.topnav{display:flex; flex-wrap:wrap; gap:6px 14px; font-size:.88rem; margin-bottom:18px}
.topnav a{text-decoration:none; font-weight:600}
.topnav a:hover{text-decoration:underline}
.topnav a.cur{color:var(--ink); pointer-events:none}

.badge{display:inline-block; font-size:.72rem; font-weight:700; letter-spacing:.04em; text-transform:uppercase;
  padding:.18em .65em; border-radius:999px; vertical-align:middle; white-space:nowrap}
.badge.learn{background:var(--accent-soft); color:var(--accent-ink)}
.badge.say{background:var(--warn-soft); color:var(--warn-ink)}
.badge.sign{background:var(--code-bg); color:var(--ink); border:1px solid var(--line-strong)}

.group{margin:30px 0}
.group > h2{margin-bottom:.3em}
.group > p.sub{color:var(--ink-soft); margin:.2em 0 .9em; font-size:.92rem}
.menu-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(250px,1fr)); gap:10px}
.menu-card{display:block; border:1px solid var(--line); background:var(--paper-2); border-radius:10px; padding:11px 14px;
  box-shadow:var(--shadow); text-decoration:none; color:var(--ink)}
.menu-card:hover{border-color:var(--accent)}
.menu-card b{display:block; font-size:.95rem}
.menu-card span{color:var(--ink-soft); font-size:.84rem}

.part-head{display:flex; align-items:center; gap:.7em; flex-wrap:wrap; margin:44px 0 6px;
  padding-top:22px; border-top:2px solid var(--line-strong)}
.part-head h2{margin:0; font-size:1.3rem}
.part-lede{color:var(--ink-soft); margin:.2em 0 1em; font-size:.93rem}
article.sec{margin:26px 0; scroll-margin-top:16px}
article.sec h3{font-size:1.1rem; margin:0 0 .5em}
article.sec h4{font-size:.98rem; margin:1.1em 0 .3em}
article.sec ul, article.sec ol{padding-left:1.25em; margin:.5em 0}
article.sec li{margin:.3em 0}
.fig{margin:14px 0}
.fig img{max-width:100%; height:auto; border:1px solid var(--line); border-radius:8px; background:#fff}
.fig.small img{max-width:min(100%,380px)}
.figs{display:flex; flex-wrap:wrap; gap:12px; align-items:flex-start}
.note{border:1px solid var(--line); border-left:3px solid var(--warn); background:var(--warn-soft); border-radius:0 10px 10px 0; padding:10px 14px; margin:.8em 0}

/* шаблоны документов */
.form-card{border:1px solid var(--line-strong); background:var(--paper-2); border-radius:10px; padding:20px 24px;
  margin:12px 0 4px; box-shadow:var(--shadow)}
.form-card .f-head{color:var(--muted); font-size:.9rem; margin-bottom:.6em}
.form-card h4{font-size:1.05rem; margin:.2em 0 .7em}
.form-card h5{font-size:.95rem; margin:1em 0 .2em}
.form-card p{margin:.45em 0}
.form-card ol{padding-left:1.3em; margin:.4em 0}
.form-card li{margin:.35em 0}
.sign-row{display:flex; flex-wrap:wrap; gap:8px 40px; margin-top:1.6em}
.ph{font-family:"IBM Plex Mono",ui-monospace,monospace; font-size:.88em; background:var(--accent-soft); color:var(--accent-ink);
  border-radius:4px; padding:0 .3em; white-space:nowrap}
.ph-manual{display:inline-block; min-width:14em; border-bottom:1px dotted var(--muted)}
.checks{list-style:none; padding-left:0!important}
.checks li::before{content:"☐ "; font-size:1.05em}
.f-meta{display:flex; align-items:center; gap:.6em; flex-wrap:wrap; margin-top:30px}
.f-meta h3{margin:0; font-size:1.1rem}
.f-when{color:var(--ink-soft); font-size:.88rem; margin:.2em 0 .5em}
.btn{font:inherit; font-size:.85rem; font-weight:600; border:1px solid var(--line-strong); background:var(--paper-2);
  color:var(--ink); border-radius:8px; padding:.3em .9em; cursor:pointer}
.btn:hover{border-color:var(--accent); color:var(--accent-ink)}

@media print{
  body{background:#fff; color:#000}
  .no-print, .topnav, header .more-link{display:none!important}
  .page{max-width:none; padding:0}
  body.print-one .f-item{display:none}
  body.print-one .f-item.printing{display:block}
  .f-item{break-inside:avoid}
  .form-card{border:none; box-shadow:none; padding:0}
  .ph{background:none; color:#000; border-radius:0}
  .ph-manual{color:transparent; border-bottom:1px solid #000; min-width:60%}
  .ph-manual *{color:transparent}
}

/* бланк эскиза: рамка под чертёж и линии для записи */
.sk-box{border:1.5px dashed var(--line-strong); border-radius:6px; margin:.6em 0 1em; padding:8px 12px; color:var(--muted); font-size:.85rem; min-height:60mm}
.sk-lines{margin:.4em 0 .8em}
.sk-line{border-bottom:1px solid var(--line-strong); height:1.9em}
@media print{
  .sk-box{border:1.5px solid #000; color:#999}
  .sk-line{border-bottom-color:#000}
  .f-head .ph-manual{min-width:8em}
}

/* метка «ОБНОВЛЕНО» (help/updates.js) */
.upd{display:inline-block; background:#e5251d; color:#fff; font:800 .62rem/1 "IBM Plex Sans",system-ui,sans-serif; letter-spacing:.06em;
  padding:.28em .6em; border-radius:999px; margin-left:.6em; vertical-align:middle; white-space:nowrap; animation:updPulse 1.8s ease-in-out infinite}
.menu-card{position:relative}
.menu-card .upd{position:absolute; top:8px; right:10px; margin:0}
@keyframes updPulse{0%,100%{box-shadow:0 0 0 0 rgba(229,37,29,.55)}50%{box-shadow:0 0 0 6px rgba(229,37,29,0)}}
@media print{.upd{display:none}}

/* готовый документ (эскиз/приложения в заказе): отмеченные пункты, картинка, тексты */
.checks li.on::before{content:"☑ "}
.ph-blank{display:inline-block; min-width:12em; border-bottom:1px solid currentColor}
.sk-img{display:block; max-width:100%; max-height:120mm; object-fit:contain; margin:.5em auto 1em; border:1px solid var(--line); border-radius:6px; background:#fff}
.sk-textline{padding:.15em 0; border-bottom:1px solid var(--line-strong); min-height:1.9em}
.sk-caption{color:var(--muted); font-size:.85rem; margin:.1em 0 .8em}
.upd-summary{margin:0 0 18px; padding:12px 16px; border:1px solid #f1b9b5; background:#fff4f3; border-radius:10px}
.upd-summary ul{margin:.4em 0 0; padding-left:1.2em}
.upd-summary li{margin:.2em 0}
@media print{.upd-summary{display:none}}