/* Лаборатория кодера: светлая и тёмная тема, без внешних шрифтов */
:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #efede6;
  --text: #1c2127;
  --muted: #5b636d;
  --line: #dcd8cd;
  --accent: #0a7556;
  --accent-ink: #ffffff;
  --accent-soft: #dcf1e7;
  --warn: #9a5200;
  --warn-soft: #fbeedb;
  --bad: #b3261e;
  --bad-soft: #fbe3e1;
  --info-soft: #e3ecf8;
  --code-bg: #f1efe8;
  --mark: #ffdf7e;
  --mark-2: #bfe6ff;
  --add: #dcf3e2;
  --del: #fbe0de;
  --shadow: 0 1px 2px rgb(20 25 30 / .06), 0 4px 16px rgb(20 25 30 / .05);
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --r: 12px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0e1216; --surface: #151b21; --surface-2: #1b232b; --text: #e4e8ec; --muted: #97a3ae;
  --line: #27323c; --accent: #4fd8a4; --accent-ink: #06251a; --accent-soft: #12352a;
  --warn: #f0b45a; --warn-soft: #3a2a10; --bad: #ff8a80; --bad-soft: #3d1715; --info-soft: #172a40;
  --code-bg: #11171c; --mark: #75600f; --mark-2: #1d4a6b; --add: #133523; --del: #44191a;
  --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 6px 20px rgb(0 0 0 / .25);
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1216; --surface: #151b21; --surface-2: #1b232b; --text: #e4e8ec; --muted: #97a3ae;
    --line: #27323c; --accent: #4fd8a4; --accent-ink: #06251a; --accent-soft: #12352a;
    --warn: #f0b45a; --warn-soft: #3a2a10; --bad: #ff8a80; --bad-soft: #3d1715; --info-soft: #172a40;
    --code-bg: #11171c; --mark: #75600f; --mark-2: #1d4a6b; --add: #133523; --del: #44191a;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 6px 20px rgb(0 0 0 / .25);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 var(--sans); overflow-wrap: break-word;
}
a { color: var(--accent); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
img, svg { max-width: 100%; height: auto; }
code, pre, kbd, samp { font-family: var(--mono); font-size: .92em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.25; letter-spacing: -.01em; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* шапка */
.top {
  position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line);
}
.top-in { max-width: 1160px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 16px; }
.brand { flex: none; display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
.brand img { border-radius: 9px; }
.brand-name { font-size: 1.05rem; }
.topnav { margin-left: auto; }
.topnav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; }
.topnav a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--muted); text-decoration: none; font-size: .95rem; }
.topnav a:hover, .topnav a[aria-current] { color: var(--text); background: var(--surface-2); }
.theme {
  flex: none; display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text); cursor: pointer;
}
@media (max-width: 640px) {
  .brand-name { display: none; }
  .top-in { gap: 8px; }
  .topnav { margin-left: 0; flex: 1; min-width: 0; }
  .topnav ul { gap: 0; }
  .topnav a { padding: 6px 5px; font-size: .85rem; white-space: nowrap; }
}

@media (max-width: 400px) { .topnav li:last-child { display: none; } }

main { max-width: 1160px; margin: 0 auto; padding: 16px 16px 48px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 8px 0 0; font-size: .88rem; color: var(--muted); }
.crumbs li + li::before { content: "/"; margin-right: 6px; opacity: .6; }
.crumbs a { color: var(--muted); }

.kicker { font: 600 .78rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--accent); margin: 0 0 8px; }
.page-head { margin: 24px 0 24px; max-width: 760px; }
.page-head h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); margin: 0 0 12px; }
.lead { font-size: 1.12rem; color: var(--muted); margin: 0 0 12px; }
.meta { color: var(--muted); font-size: .9rem; margin: 0; }
.local-badge { display: inline-flex; align-items: center; gap: 6px; font-size: .88rem; color: var(--accent);
  background: var(--accent-soft); padding: 4px 10px; border-radius: 99px; margin: 0; }

/* кнопки */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 9px 16px; border-radius: 10px;
  background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent); text-decoration: none;
  font: 600 .95rem/1.2 var(--sans); cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-small { padding: 6px 10px; font-size: .85rem; }
.hero-links { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 0; }

/* главная */
.hero { display: grid; grid-template-columns: 1.15fr .85fr; gap: 32px; align-items: center; padding: 32px 0 16px; }
.hero h1 { font-size: clamp(1.9rem, 4.6vw, 3rem); margin: 0 0 16px; }
.hero-art { width: 100%; }
@media (max-width: 820px) { .hero { grid-template-columns: 1fr; } .hero-art { max-width: 420px; } }
.block { margin-top: 48px; }
.block-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 16px; margin-bottom: 16px; }
.block-head h2 { margin: 0; font-size: 1.6rem; }
.block-head p { margin: 0; }

.tool-grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.tcard a {
  display: grid; grid-template-columns: 48px 1fr; grid-template-rows: auto auto; column-gap: 12px; height: 100%;
  padding: 14px; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface);
  color: var(--text); text-decoration: none; transition: border-color .15s, transform .15s;
}
.tcard a:hover { border-color: var(--accent); transform: translateY(-1px); }
.tcard-icon { grid-row: 1 / 3; width: 48px; height: 48px; }
.ti-bg { fill: var(--accent-soft); }
.ti-corner { fill: var(--accent); opacity: .5; }
.ti-line { stroke: var(--accent); stroke-width: 1.5; }
.ti-text { fill: var(--accent); }
.tcard-name { font-weight: 650; line-height: 1.3; align-self: end; }
.tcard-note { font-size: .88rem; color: var(--muted); line-height: 1.4; }
.tool-grid-small { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); margin-bottom: 12px; }

.ref-groups { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 820px) { .ref-groups { grid-template-columns: 1fr; } }
.ref-group { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; }
.ref-group h3 { margin: 0 0 4px; font-size: 1.15rem; }
.ref-group > p { margin: 0 0 10px; font-size: .92rem; }
.ref-list { list-style: none; padding: 0; margin: 0; }
.ref-list a { display: block; padding: 8px 0; border-top: 1px dashed var(--line); text-decoration: none; color: var(--text); }
.ref-list li:first-child a { border-top: 0; }
.ref-list a:hover .ref-name { color: var(--accent); text-decoration: underline; }
.ref-name { display: block; font-weight: 600; }
.ref-note { display: block; font-size: .88rem; color: var(--muted); line-height: 1.45; }

/* статьи */
.doc-grid { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 40px; align-items: start; }
.doc-grid > .prose:only-child { grid-column: 1 / -1; }
.toc { position: sticky; top: 76px; font-size: .9rem; border-left: 2px solid var(--line); padding-left: 14px; }
.toc-h { font: 600 .75rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 8px; }
.toc ol { margin: 0; padding-left: 18px; }
.toc li { margin: 4px 0; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--accent); }
@media (max-width: 900px) {
  .doc-grid { grid-template-columns: 1fr; gap: 0; }
  .toc { position: static; border: 1px solid var(--line); border-radius: var(--r); padding: 12px 16px; background: var(--surface); margin-bottom: 8px; }
}
.prose { max-width: 780px; min-width: 0; }
.doc-narrow .prose { max-width: 720px; }
.prose h2 { font-size: 1.45rem; margin: 2em 0 .6em; padding-top: .2em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.12rem; margin: 1.6em 0 .5em; }
.prose p, .prose ul, .prose ol { margin: 0 0 1em; }
.prose li { margin: .3em 0; }
.prose code { background: var(--code-bg); border: 1px solid var(--line); border-radius: 5px; padding: .05em .35em; }
.prose pre code, .code pre code { background: none; border: 0; padding: 0; }
.code { position: relative; margin: 0 0 1.2em; border: 1px solid var(--line); border-radius: 10px; background: var(--code-bg); }
.code pre { margin: 0; padding: 14px 16px; overflow-x: auto; line-height: 1.5; font-size: .9rem; tab-size: 4; }
.code-lang { position: absolute; left: 12px; top: -10px; font: 600 .7rem/1 var(--mono); background: var(--surface);
  border: 1px solid var(--line); border-radius: 6px; padding: 3px 6px; color: var(--muted); }
.code .copy { position: absolute; right: 8px; top: 8px; opacity: 0; }
.code:hover .copy, .code .copy:focus { opacity: 1; }
@media (hover: none) { .code .copy { opacity: 1; } }
.copy {
  font: 500 .78rem/1 var(--sans); padding: 6px 9px; border-radius: 7px; border: 1px solid var(--line);
  background: var(--surface); color: var(--text); cursor: pointer;
}
.copy.done { color: var(--accent); border-color: var(--accent); }
.table { overflow-x: auto; margin: 0 0 1.2em; border: 1px solid var(--line); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { text-align: left; vertical-align: top; padding: 8px 12px; border-bottom: 1px solid var(--line); }
th { background: var(--surface-2); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td code { white-space: nowrap; }
.note { border-radius: 10px; padding: 12px 16px; margin: 0 0 1.2em; border-left: 4px solid var(--accent); background: var(--accent-soft); }
.note p { margin: 0; }
.note-label { font-weight: 700; font-size: .85rem; margin-bottom: 2px !important; }
.note-warn { border-color: var(--warn); background: var(--warn-soft); }
.note-info { border-color: #3b7bd1; background: var(--info-soft); }

.related { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); }
.related h2 { font-size: 1.2rem; margin: 0 0 12px; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 32px; }
.pager a { border: 1px solid var(--line); border-radius: var(--r); padding: 12px 16px; text-decoration: none; color: var(--text); background: var(--surface); }
.pager a:hover { border-color: var(--accent); }
.pager a[rel="next"] { text-align: right; }
.pager span { display: block; font-size: .8rem; color: var(--muted); }

/* инструменты */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; box-shadow: var(--shadow); margin-bottom: 24px; }
.panel + .panel { margin-top: -8px; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 12px; }
.row:last-child { margin-bottom: 0; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .cols { grid-template-columns: 1fr; } }
label, .label { font-size: .88rem; font-weight: 600; color: var(--muted); }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
textarea, input[type="text"], input[type="number"], input[type="search"], input[type="datetime-local"], select {
  width: 100%; font: 14px/1.5 var(--mono); color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 9px; padding: 9px 11px;
}
select, input[type="number"] { width: auto; font-family: var(--sans); }
textarea { min-height: 220px; resize: vertical; tab-size: 2; }
textarea:focus, input:focus, select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.check { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; color: var(--text); font-size: .92rem; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }
input[type="range"] { accent-color: var(--accent); }
input[type="color"] { width: 48px; height: 38px; border: 1px solid var(--line); border-radius: 9px; padding: 2px; background: var(--bg); }
.out {
  font: 14px/1.5 var(--mono); background: var(--code-bg); border: 1px solid var(--line); border-radius: 9px;
  padding: 10px 12px; white-space: pre-wrap; word-break: break-all; min-height: 44px; margin: 0;
}
.status { font-size: .92rem; padding: 8px 12px; border-radius: 9px; margin: 0; }
.status:empty { display: none; }
.status.ok { background: var(--accent-soft); color: var(--accent); }
.status.bad { background: var(--bad-soft); color: var(--bad); }
.status.warn { background: var(--warn-soft); color: var(--warn); }
.kv { display: grid; grid-template-columns: minmax(120px, max-content) 1fr auto; gap: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.kv > * { padding: 8px 12px; border-bottom: 1px solid var(--line); min-width: 0; }
.kv > :nth-last-child(-n+3) { border-bottom: 0; }
.kv dt { color: var(--muted); font-size: .9rem; background: var(--surface-2); }
.kv dd { margin: 0; font-family: var(--mono); font-size: .92rem; word-break: break-all; }
.kv .copy { align-self: center; margin-right: 8px; padding: 4px 8px; border-bottom: 1px solid var(--line); }
mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 1px; }
mark.alt { background: var(--mark-2); }
.hl { white-space: pre-wrap; word-break: break-word; }
.list-out { list-style: none; padding: 0; margin: 0; font-family: var(--mono); font-size: .92rem; }
.list-out li { padding: 6px 0; border-bottom: 1px dashed var(--line); display: flex; justify-content: space-between; gap: 12px; }
.list-out li:last-child { border-bottom: 0; }
.diff { font: 13px/1.5 var(--mono); border: 1px solid var(--line); border-radius: 9px; overflow: auto; max-height: 70vh; }
.diff table { font: inherit; }
.diff td { padding: 0 8px; border: 0; white-space: pre-wrap; word-break: break-all; }
.diff .n { color: var(--muted); text-align: right; user-select: none; width: 1%; white-space: nowrap; background: var(--surface-2); }
.diff .s { width: 1%; user-select: none; color: var(--muted); }
.diff tr.add { background: var(--add); }
.diff tr.del { background: var(--del); }
.swatch { width: 100%; height: 120px; border-radius: 10px; border: 1px solid var(--line); }
.contrast { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.contrast div { border-radius: 10px; padding: 14px; border: 1px solid var(--line); font-weight: 600; }
.bits { font: 13px/1.6 var(--mono); overflow-x: auto; white-space: nowrap; }
.bits .net { color: var(--accent); }
.big-out { font: 600 1.25rem/1.4 var(--mono); word-break: break-all; }
.meter { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .2s; }
.tool .prose { margin-top: 8px; }

/* подвал и 404 */
.foot { border-top: 1px solid var(--line); background: var(--surface); }
.foot-in { max-width: 1160px; margin: 0 auto; padding: 28px 16px; display: grid; grid-template-columns: 1fr auto; gap: 24px; font-size: .92rem; color: var(--muted); }
.foot-name { font-weight: 700; color: var(--text); margin: 0 0 4px; }
.foot-about p { margin: 0 0 4px; max-width: 560px; }
.foot-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.foot-links a { color: var(--muted); }
@media (max-width: 640px) { .foot-in { grid-template-columns: 1fr; } }
.err { text-align: center; padding: 48px 0; }
.err-code { font: 700 4rem/1 var(--mono); color: var(--accent); margin: 16px 0 0; }
.err .hero-links { justify-content: center; }
.mt { margin-top: 12px; }
.grow { flex: 1 1 320px; }
.narrow { flex: 0 1 160px; }
textarea.short { min-height: 110px; }
.big-input { font-size: 1.15rem; padding: 12px 14px; }
output { font: 600 .95rem/1 var(--mono); min-width: 2.5em; }
[hidden] { display: none !important; }

/* доклады: маршруты по темам, запись с пересказом, подпись об авторе и лицензии */
.topics ul { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.topics a { display: inline-block; padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); text-decoration: none; }
.route-start { margin: 0 0 16px; }
.vlist { list-style: none; margin: 0; padding: 0; display: grid; gap: 28px; }
.vcard { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; box-shadow: var(--shadow); }
.vcard h3 { margin: 0; }
.vorig { margin: 2px 0 12px; color: var(--muted); font-style: italic; }
.vcard h4 { font: 600 .75rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 16px 0 6px; }
.vcard ul { margin: 0; padding-left: 20px; }
.vcard li + li { margin-top: 4px; }
.video { margin: 0; padding: 0; width: 100%; }
.video video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; background: #000; border-radius: 8px; }
.credit { font-size: .82rem; color: var(--muted); margin-top: 6px; }
.credit a { color: var(--muted); }
.vnote { font-size: .88rem; margin: 8px 0 0; }
.talks-link { margin: 12px 0 0; }
.vchapters { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.vcard .vchapters li + li { margin-top: 0; }
.vchap { display: flex; gap: 10px; width: 100%; text-align: left; padding: 6px 8px; border: 0; border-radius: 6px; background: none; color: inherit; font: inherit; cursor: pointer; }
.vchap:hover, .vchap:focus-visible { background: var(--line); }
.vt { font: 600 .85rem/1.6 var(--mono); color: var(--accent); min-width: 4.2em; }
.term { background: #101116; color: #dee1e8; border-radius: 8px; padding: 12px 14px; }
.term-step { margin: 0 0 8px; font: 600 .78rem/1.4 var(--mono); color: #ffc45c; }
.term-screen { margin: 0; padding: 0; background: none; border: 0; color: inherit; font: .82rem/1.35 var(--mono); white-space: pre; height: calc(22 * 1.35em); overflow: auto hidden; }
.term-screen .t-green { color: #7ed385; font-weight: 700; }
.term-screen .t-blue { color: #7aaaf7; font-weight: 700; }
.term-screen .t-yellow { color: #ffc45c; }
.term-cap { margin: 10px 0 0; padding: 8px 10px; border-left: 3px solid #ffc45c; background: #21242e; font-size: .95rem; min-height: 3.2em; }
.term-bar { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.term-play { font: inherit; padding: 4px 14px; border-radius: 6px; border: 1px solid #444a5a; background: #2a2e3a; color: inherit; cursor: pointer; min-width: 7.5em; }
.term-seek { flex: 1; min-width: 0; }
.term-time { font: .8rem var(--mono); color: #a0a6b4; white-space: nowrap; }