/* gnss-gateway — сторінка-довідка. Без збирачів і зовнішніх залежностей.
   Палітра — та сама, що в застосунку (res/values/colors.xml), щоб сторінка й застосунок упізнавались разом.
   Правки — патчами; структура й якорі описані в site/README.md. */

/* ---------- Шрифти (IBM Plex, SIL OFL 1.1 — див. fonts/OFL.txt) ---------- */
@font-face { font-family: "Plex Sans"; font-style: normal; font-weight: 400; font-display: swap;
  src: url(fonts/ibm-plex-sans-cyrillic-400-normal.woff2) format("woff2");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "Plex Sans"; font-style: normal; font-weight: 400; font-display: swap;
  src: url(fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Plex Sans"; font-style: normal; font-weight: 600; font-display: swap;
  src: url(fonts/ibm-plex-sans-cyrillic-600-normal.woff2) format("woff2");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "Plex Sans"; font-style: normal; font-weight: 600; font-display: swap;
  src: url(fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Plex Mono"; font-style: normal; font-weight: 500; font-display: swap;
  src: url(fonts/ibm-plex-mono-cyrillic-500-normal.woff2) format("woff2");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "Plex Mono"; font-style: normal; font-weight: 500; font-display: swap;
  src: url(fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

/* ---------- Токени ---------- */
:root {
  --bg: #E3E3E1;            /* корпус (base_background, трохи світліший для читання) */
  --surface: #F4F1EA;       /* accent_secondary — «папір» */
  --surface-2: #D8D9D9;     /* base_background */
  --ink: #1B1C1E;
  --ink-2: #4A4D51;
  --line: #B9BBBC;
  --accent: #FF3B00;        /* accent_primary — лише для великих елементів і графіки */
  --accent-ink: #B82A00;    /* те саме, але для тексту й посилань (контраст ≥ 4.5:1) */
  --display: #111111;       /* display_black */
  --segment: #FFBD00;       /* segment_glow */
  --gnss: #4CAF50;
  --core-gnss: #8BC34A;
  --dr: #F44336;
  --resync: #FF9800;
  --hyp: #1E88E5;
  --calib: #FFEB3B;
  --ring-ok: #1B5E20;
  --ok: #2E7D32;
  --warn-bg: #FFF4D6;
  --warn-line: #E0A800;
  --radius: 14px;
  --radius-s: 8px;
  --shadow: 0 1px 0 rgba(255,255,255,.6) inset, 0 1px 2px rgba(0,0,0,.08), 0 6px 18px rgba(0,0,0,.06);
  --sans: "Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --header-h: 56px;
  --measure: 70ch;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161718; --surface: #202225; --surface-2: #2A2C2E; --ink: #ECEAE4; --ink-2: #A8ABAF;
    --line: #3A3D41; --accent-ink: #FF7A4D; --ok: #66BB6A; --warn-bg: #2E2614; --warn-line: #A07800;
    --shadow: 0 1px 0 rgba(255,255,255,.04) inset, 0 6px 18px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"] {
  --bg: #161718; --surface: #202225; --surface-2: #2A2C2E; --ink: #ECEAE4; --ink-2: #A8ABAF;
  --line: #3A3D41; --accent-ink: #FF7A4D; --ok: #66BB6A; --warn-bg: #2E2614; --warn-line: #A07800;
  --shadow: 0 1px 0 rgba(255,255,255,.04) inset, 0 6px 18px rgba(0,0,0,.35);
}

/* ---------- База ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--accent-ink); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3, h4 { line-height: 1.2; font-weight: 600; letter-spacing: -.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.4rem); letter-spacing: -.025em; }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.3rem); margin-top: 1.8em; }
h4 { font-size: 1.02rem; margin-top: 1.4em; }
p, ul, ol, dl { margin: 0 0 1em; }
ul, ol { padding-left: 1.3em; }
li + li { margin-top: .35em; }
code, kbd, .mono { font-family: var(--mono); font-weight: 500; font-size: .88em; }
code { background: var(--surface-2); padding: .08em .35em; border-radius: 4px; }
kbd { border: 1px solid var(--line); border-bottom-width: 2px; padding: 0 .35em; border-radius: 4px; background: var(--surface); }
small, .small { font-size: .88rem; }
.muted { color: var(--ink-2); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--bg); padding: 8px 12px; z-index: 100; border-radius: 6px; }
.skip:focus { left: 8px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap { width: min(1180px, 100% - 32px); margin-inline: auto; }

/* ---------- Шапка ---------- */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 40; height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(10px); backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { height: 100%; display: flex; align-items: center; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-family: var(--mono); font-weight: 500; letter-spacing: .02em; }
.brand svg { width: 26px; height: 26px; flex: none; }
.brand .tag { font-size: .7rem; padding: 2px 6px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-2); }
.top-nav { margin-left: auto; display: flex; gap: 4px; }
.top-nav a { color: var(--ink); text-decoration: none; font-size: .92rem; padding: 6px 10px; border-radius: 999px; }
.top-nav a:hover { background: var(--surface-2); }
.theme-btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink); width: 36px; height: 36px; border-radius: 50%; cursor: pointer; display: grid; place-items: center; flex: none; }
.theme-btn svg { width: 18px; height: 18px; }
@media (max-width: 860px) { .top-nav { display: none; } .theme-btn { margin-left: auto; } }

/* ---------- Мітки-«клавіші» в стилі приладу ---------- */
.kicker { font-family: var(--mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.kicker .num { color: var(--accent-ink); }
.kicker::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* ---------- Герой ---------- */
.hero { padding: clamp(32px, 6vw, 72px) 0 clamp(28px, 4vw, 48px); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(24px, 4vw, 56px); align-items: center; }
.hero h1 em { font-style: normal; color: var(--accent-ink); }
.lede { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--ink-2); max-width: 36em; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 18px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 18px; border-radius: 999px; font-weight: 600; text-decoration: none; border: 1px solid transparent; font-size: .98rem; line-height: 1; cursor: pointer; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 2px 0 #B82A00; }
.btn-primary:hover { background: #E83500; }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink-2); }
.needs { display: flex; flex-direction: column; gap: 8px; }
.needs-label { font-family: var(--mono); font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); text-decoration: none; }
.needs-label:hover { color: var(--ink); }
.hero-facts { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
.hero-facts li { margin: 0; font-family: var(--mono); font-size: .78rem; padding: 6px 10px; border-radius: 6px; background: var(--surface); border: 1px solid var(--line); box-shadow: 0 2px 0 var(--line); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } }

/* Дисплей-демо */
.device {
  background: linear-gradient(180deg, #D9DADA, #CACBCB); border-radius: 22px; padding: 14px;
  box-shadow: 0 1px 0 #fff inset, 0 -1px 0 rgba(0,0,0,.15) inset, 0 18px 40px rgba(0,0,0,.18);
}
:root[data-theme="dark"] .device { background: linear-gradient(180deg, #34373A, #2A2C2E); box-shadow: 0 18px 40px rgba(0,0,0,.5); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .device { background: linear-gradient(180deg, #34373A, #2A2C2E); box-shadow: 0 18px 40px rgba(0,0,0,.5); } }
.device .screen { background: var(--display); border-radius: 12px; overflow: hidden; border: 1px solid rgba(255,255,255,.08); }
.device .screen svg { display: block; width: 100%; height: auto; }
.device .legend { display: flex; flex-wrap: wrap; gap: 6px 14px; padding: 10px 4px 2px; font-family: var(--mono); font-size: .74rem; color: #3b3e41; }
:root[data-theme="dark"] .device .legend { color: #b8bbbe; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .device .legend { color: #b8bbbe; } }
.device .legend span { display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex: none; }
.device .controls { display: flex; justify-content: flex-end; padding: 4px 4px 0; }
.device .controls button { font-family: var(--mono); font-size: .72rem; border: 1px solid rgba(0,0,0,.2); background: #ECECEA; border-radius: 6px; padding: 4px 8px; cursor: pointer; box-shadow: 0 2px 0 rgba(0,0,0,.18); }

/* ---------- Секції лендінгу ---------- */
.band { padding: clamp(40px, 6vw, 80px) 0; border-top: 1px solid var(--line); }
.band.alt { background: var(--surface); }
.band > .wrap > h2, .band .head h2 { max-width: 24em; }
.band .intro { color: var(--ink-2); max-width: var(--measure); font-size: 1.06rem; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.band.alt .card { background: var(--bg); }
.card h3 { margin-top: 0; font-size: 1.12rem; }
.card p:last-child { margin-bottom: 0; }
.card .label { font-family: var(--mono); font-size: .74rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); display: block; margin-bottom: 10px; }
@media (max-width: 860px) { .cards { grid-template-columns: 1fr; } }

/* Поїздка: телефон + часова шкала */
.drive { display: grid; grid-template-columns: 300px 1fr; gap: clamp(24px, 5vw, 64px); align-items: start; margin-top: 28px; }
@media (max-width: 860px) { .drive { grid-template-columns: 1fr; } .drive .phone { margin-inline: auto; } }
.timeline { list-style: none; padding: 0; margin: 0; counter-reset: t; }
.timeline li { position: relative; padding: 0 0 22px 46px; margin: 0; counter-increment: t; }
.timeline li::before { content: counter(t, decimal-leading-zero); position: absolute; left: 0; top: 0; font-family: var(--mono); font-size: .78rem; width: 32px; height: 26px; display: grid; place-items: center; border-radius: 6px; background: var(--surface); border: 1px solid var(--line); box-shadow: 0 2px 0 var(--line); }
.band.alt .timeline li::before { background: var(--bg); }
.timeline li::after { content: ""; position: absolute; left: 16px; top: 32px; bottom: 4px; width: 1px; background: var(--line); }
.timeline li:last-child::after { display: none; }
.timeline strong { display: block; }

/* Макет телефона (схематично; поточний вигляд застосунку — тимчасовий) */
.phone { width: 280px; max-width: 100%; aspect-ratio: 9 / 18.5; background: #1C1D1F; border-radius: 34px; padding: 10px; box-shadow: 0 0 0 2px #3a3c3f inset, 0 20px 50px rgba(0,0,0,.25); position: relative; }
.phone .scr { position: relative; width: 100%; height: 100%; border-radius: 26px; overflow: hidden; background: #EDEAE2; }
.phone .scr svg.map { position: absolute; inset: 0; width: 100%; height: 100%; }
.phone .nav-bar { position: absolute; left: 10px; right: 10px; top: 12px; background: #2C5E3F; color: #fff; border-radius: 12px; padding: 10px 12px; font-size: .82rem; line-height: 1.3; }
.phone .nav-bar b { font-size: 1.05rem; display: block; }
.phone .bubble { position: absolute; right: 14px; top: 42%; width: 44px; height: 44px; border-radius: 50%; border: 5px solid var(--ring-ok); background: var(--hyp); display: grid; place-items: center; color: #fff; font: 600 .7rem/1 var(--mono); box-shadow: 0 4px 10px rgba(0,0,0,.3); }
.phone .caption { position: absolute; left: 0; right: 0; bottom: -34px; text-align: center; font-size: .78rem; color: var(--ink-2); }

/* Кружок: легенда */
.light-legend { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 18px; margin: 18px 0 0; padding: 0; list-style: none; }
.light-legend li { margin: 0; display: flex; gap: 10px; align-items: flex-start; font-size: .94rem; }
.mini-light { width: 30px; height: 30px; border-radius: 50%; border: 4px solid var(--ring-ok); flex: none; display: grid; place-items: center; font: 600 .56rem/1 var(--mono); color: #fff; }
.mini-light.pulse { border-color: var(--dr); }
@media (prefers-reduced-motion: no-preference) { .mini-light.pulse { animation: pulse 1.2s ease-in-out infinite; } }
@keyframes pulse { 50% { border-color: rgba(211,47,47,.25); } }
@media (max-width: 560px) { .light-legend { grid-template-columns: 1fr; } }

/* Порівняння «було / стало» */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.compare .col { border-radius: var(--radius); padding: 20px; border: 1px solid var(--line); background: var(--surface); }
.band.alt .compare .col { background: var(--bg); }
.compare h3 { margin-top: 0; font-size: 1.05rem; display: flex; gap: 8px; align-items: center; }
.compare ul { margin: 0; }
@media (max-width: 760px) { .compare { grid-template-columns: 1fr; } }

/* ---------- Довідка: зміст + вміст ---------- */
.docs { border-top: 1px solid var(--line); padding: clamp(36px, 5vw, 64px) 0 40px; }
.docs-head { margin-bottom: 28px; }
.docs-grid { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.toc { position: sticky; top: calc(var(--header-h) + 16px); max-height: calc(100vh - var(--header-h) - 32px); overflow: auto; padding-right: 6px; font-size: .92rem; overscroll-behavior: contain; }
.toc .toc-title { font-family: var(--mono); font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 10px; }
.toc ol { list-style: none; padding: 0; margin: 0; }
.toc li { margin: 0; }
.toc a { display: block; padding: 5px 10px; border-left: 2px solid var(--line); color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--ink); border-left-color: var(--ink-2); }
.toc a.active { color: var(--ink); border-left-color: var(--accent); font-weight: 600; background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 10%, transparent), transparent); }
.toc ol ol a { padding-left: 22px; font-size: .86rem; }
@media (max-width: 1000px) { .docs-grid { grid-template-columns: 1fr; } .toc { display: none; } }

.doc { max-width: 78ch; }
.doc > section { padding-top: 8px; margin-bottom: clamp(40px, 6vw, 72px); }
.doc > section > h2 { padding-top: 6px; }
.doc section section { margin-top: 0; }

/* Заголовок із кнопкою «скопіювати посилання» (кнопку додає app.js) */
.anchor-btn { margin-left: .3em; color: var(--ink-2); text-decoration: none; padding: 2px 5px; border-radius: 6px; font: 500 .7em/1 var(--mono); vertical-align: middle; opacity: .55; }
.anchor-btn:hover, .anchor-btn:focus-visible { opacity: 1; background: var(--surface-2); color: var(--ink); }
:is(h2, h3):hover .anchor-btn { opacity: 1; }
@media (hover: none) { .anchor-btn { opacity: .8; } }

/* Примітки */
.note { border: 1px solid var(--line); border-left: 4px solid var(--ink-2); background: var(--surface); border-radius: var(--radius-s); padding: 14px 16px; margin: 0 0 1.2em; }
.note > :last-child { margin-bottom: 0; }
.note.warn { border-left-color: var(--warn-line); background: var(--warn-bg); }
.note.honest { border-left-color: var(--accent); }
.note .note-title { font-family: var(--mono); font-size: .74rem; letter-spacing: .07em; text-transform: uppercase; display: block; margin-bottom: 6px; color: var(--ink-2); }
.tmp-ui { font-family: var(--mono); font-size: .74rem; color: var(--ink-2); border: 1px dashed var(--line); border-radius: 6px; padding: 4px 8px; display: inline-block; }

/* Таблиці — на телефоні перетворюються на картки */
.table-wrap { overflow-x: auto; margin: 0 0 1.2em; border: 1px solid var(--line); border-radius: var(--radius-s); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .94rem; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { font-family: var(--mono); font-weight: 500; font-size: .76rem; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-2); background: var(--surface-2); }
tr:last-child td { border-bottom: 0; }
@media (max-width: 640px) {
  table.stack thead { display: none; }
  table.stack, table.stack tbody, table.stack tr, table.stack td { display: block; width: 100%; }
  table.stack tr { border-bottom: 1px solid var(--line); padding: 8px 0; }
  table.stack tr:last-child { border-bottom: 0; }
  table.stack td { border: 0; padding: 4px 12px; }
  table.stack td::before { content: attr(data-th); display: block; font-family: var(--mono); font-size: .7rem; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-2); }
  table.stack td:first-child { font-weight: 600; font-size: 1rem; }
  table.stack td:first-child::before { display: none; }
}
.status { font-family: var(--mono); font-size: .76rem; padding: 2px 8px; border-radius: 999px; white-space: nowrap; border: 1px solid currentColor; }
.status.yes { color: var(--ok); }
.status.part { color: #B26A00; }
.status.no { color: var(--accent-ink); }
.status.unk { color: var(--ink-2); }
:root[data-theme="dark"] .status.part { color: #FFB74D; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .status.part { color: #FFB74D; } }

/* Схема «звідки береться позиція» */
.flow { display: grid; grid-template-columns: 1fr auto 1.1fr auto 1fr; gap: 10px; align-items: center; margin: 22px 0 26px; }
.flow .stack-col { display: grid; gap: 8px; }
.flow .box { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: .9rem; line-height: 1.35; box-shadow: 0 2px 0 var(--line); }
.flow .box b { display: block; font-size: .95rem; }
.flow .box .muted { font-size: .82rem; }
.flow .core { background: var(--display); color: #EDEDED; border-color: #000; box-shadow: none; padding: 16px; }
.flow .core b { color: var(--segment); font-family: var(--mono); font-weight: 500; letter-spacing: .04em; }
.flow .core ol { margin: 8px 0 0; padding-left: 1.2em; font-size: .86rem; color: #CFCFCF; }
.flow .arrow { font-family: var(--mono); color: var(--ink-2); text-align: center; font-size: 1.2rem; }
.flow .out { border-color: var(--accent); }
@media (max-width: 760px) {
  .flow { grid-template-columns: 1fr; }
  .flow .arrow { transform: rotate(90deg); line-height: 1; }
}

/* Режими */
.modes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 16px 0 20px; }
.mode { display: flex; gap: 12px; align-items: flex-start; padding: 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.mode .chip { font: 500 .78rem/1 var(--mono); padding: 6px 8px; border-radius: 6px; color: #fff; flex: none; min-width: 40px; text-align: center; }
.mode p { margin: 0; font-size: .93rem; }
@media (max-width: 640px) { .modes { grid-template-columns: 1fr; } }

/* Кроки встановлення */
.steps { list-style: none; padding: 0; margin: 18px 0; counter-reset: s; }
.steps > li { counter-increment: s; position: relative; padding: 16px 16px 16px 64px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); margin: 0 0 12px; }
.steps > li::before { content: counter(s); position: absolute; left: 16px; top: 16px; width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; background: var(--display); color: var(--segment); font: 500 .95rem/1 var(--mono); }
.steps > li > h3 { margin: 2px 0 8px; font-size: 1.1rem; }
.steps > li > :last-child { margin-bottom: 0; }
@media (max-width: 560px) {
  .steps > li { padding: 16px; }
  .steps > li::before { top: 14px; }
  .steps > li > h3 { margin-left: 44px; min-height: 32px; display: flex; flex-wrap: wrap; align-items: center; gap: 0 4px; }
}
.steps .opt { font-family: var(--mono); font-size: .72rem; color: var(--ink-2); border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; margin-left: 6px; vertical-align: middle; font-weight: 500; }
.path { font-family: var(--mono); font-size: .86rem; background: var(--surface-2); border-radius: 6px; padding: 2px 6px; white-space: normal; -webkit-box-decoration-break: clone; box-decoration-break: clone; line-height: 1.9; }
.path .sep { color: var(--accent-ink); padding: 0 .2em; }

/* Макет екрана налаштувань */
.app-mock { width: min(340px, 100%); border-radius: 18px; background: var(--surface-2); border: 1px solid var(--line); padding: 12px; font-size: .86rem; margin: 6px 0 18px; }
.app-mock .row { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 8px; background: #F4F1EA; color: #1B1C1E; margin-bottom: 6px; }
.app-mock .row:last-of-type { margin-bottom: 8px; }
.app-mock .row.done { color: #2E7D32; font-weight: 600; }
.app-mock .row .tick { width: 18px; text-align: center; font-family: var(--mono); }
.app-mock .row.done .tick::before { content: "✓"; }
.app-mock .row:not(.done) .tick::before { content: "○"; color: #8a8d90; }

/* Вкладки виробників */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 0; padding: 6px; background: var(--surface-2); border-radius: 12px; }
.tabs [role="tab"] { border: 0; background: transparent; color: var(--ink); padding: 8px 12px; border-radius: 8px; cursor: pointer; font: 600 .9rem/1.2 var(--sans); }
.tabs [role="tab"][aria-selected="true"] { background: var(--surface); box-shadow: 0 1px 2px rgba(0,0,0,.12); }
.tabpanel { border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 18px 16px; margin-top: 10px; background: var(--surface); }
.tabpanel > h3 { margin-top: 14px; }
.no-js .tabs { display: none; }
.js .tabpanel[hidden] { display: none; }

/* FAQ */
details.faq { border: 1px solid var(--line); border-radius: 10px; background: var(--surface); margin: 0 0 8px; }
details.faq > summary { cursor: pointer; padding: 14px 44px 14px 16px; font-weight: 600; list-style: none; position: relative; }
details.faq > summary::-webkit-details-marker { display: none; }
details.faq > summary::after { content: "+"; position: absolute; right: 16px; top: 50%; transform: translateY(-50%); font: 500 1.2rem/1 var(--mono); color: var(--ink-2); }
details.faq[open] > summary::after { content: "−"; }
details.faq > div { padding: 0 16px 6px; }
details.faq:target, details.faq.flash { outline: 2px solid var(--accent); }

/* Кнопка «Зміст» і діалог на телефоні */
.toc-fab { position: fixed; right: 16px; bottom: 16px; z-index: 50; display: none; align-items: center; gap: 8px; padding: 12px 16px; border-radius: 999px; border: 0; background: var(--display); color: var(--segment); font: 500 .9rem/1 var(--mono); box-shadow: 0 6px 20px rgba(0,0,0,.3); cursor: pointer; }
@media (max-width: 1000px) { .js .toc-fab.visible { display: inline-flex; } }
dialog.toc-dialog { border: 0; padding: 0; border-radius: 18px 18px 0 0; width: 100%; max-width: 560px; margin: auto auto 0; max-height: 80vh; background: var(--surface); color: var(--ink); }
dialog.toc-dialog::backdrop { background: rgba(0,0,0,.45); }
dialog.toc-dialog .dlg-head { position: sticky; top: 0; display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; background: var(--surface); border-bottom: 1px solid var(--line); }
dialog.toc-dialog .dlg-head b { font-family: var(--mono); font-weight: 500; letter-spacing: .06em; text-transform: uppercase; font-size: .8rem; }
dialog.toc-dialog .dlg-head button { border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
dialog.toc-dialog nav { padding: 8px 8px 24px; }
dialog.toc-dialog ol { list-style: none; margin: 0; padding: 0; }
dialog.toc-dialog li { margin: 0; }
dialog.toc-dialog a { display: block; padding: 10px 12px; border-radius: 8px; color: var(--ink); text-decoration: none; }
dialog.toc-dialog ol ol a { padding-left: 28px; color: var(--ink-2); font-size: .94rem; }
dialog.toc-dialog a.active { background: var(--surface-2); }

/* Тост */
.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; z-index: 60; background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 999px; font-size: .9rem; transition: opacity .2s, transform .2s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Підвал */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0 48px; font-size: .9rem; color: var(--ink-2); background: var(--surface); }
.site-footer .cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; }
.site-footer h2 { font-size: .8rem; font-family: var(--mono); font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 10px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer a { color: var(--ink); }
@media (max-width: 760px) { .site-footer .cols { grid-template-columns: 1fr; } }

@media print {
  .site-header, .toc, .toc-fab, .anchor-btn, .tabs, .theme-btn, .device .controls { display: none !important; }
  .js .tabpanel[hidden] { display: block !important; }
  .docs-grid { grid-template-columns: 1fr; }
  body { background: #fff; }
}