/* 12volt — один файл стилей. Тёмная «приборная» шапка, светлые таблицы. */
:root {
  --ink: #14171c;
  --ink-2: #4a515c;
  --ink-3: #7b8390;
  --line: #e3e6ea;
  --bg: #f5f6f8;
  --card: #fff;
  --dark: #111418;
  --dark-2: #1b2027;
  --acc: #ffc21a;
  --acc-ink: #3a2c00;
  --plus: #d6332a;
  --minus: #1d1f23;
  --ok: #1f8a4c;
  --warn: #b26a00;
  --link: #0b5bd3;
  --r: 10px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--ink); background: var(--bg); }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(24px, 3.2vw, 34px); }
h2 { font-size: 22px; margin-top: 1.6em; }
h3 { font-size: 17px; }
p { margin: 0 0 1em; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--ink-3); }
.small { font-size: 13px; }
.mono { font-family: var(--mono); }
.nowrap { white-space: nowrap; }

/* ── шапка ── */
.top { background: var(--dark); color: #e8eaee; position: sticky; top: 0; z-index: 20; border-bottom: 1px solid #000; }
.top .wrap { display: flex; align-items: center; gap: 22px; height: 58px; }
.logo { display: flex; align-items: center; gap: 9px; color: #fff; font-weight: 800; font-size: 19px; letter-spacing: -.02em; }
.logo:hover { text-decoration: none; }
.logo .cell { display: inline-grid; place-items: center; width: 34px; height: 24px; border: 2px solid var(--acc); border-radius: 4px; position: relative; font-size: 11px; color: var(--acc); font-weight: 900; }
.logo .cell::before, .logo .cell::after { content: ""; position: absolute; top: -6px; width: 6px; height: 4px; background: var(--acc); border-radius: 1px; }
.logo .cell::before { left: 5px; } .logo .cell::after { right: 5px; }
.nav { display: flex; gap: 2px; flex: 1; overflow-x: auto; scrollbar-width: none; }
.nav a { color: #b9bfc8; padding: 8px 11px; border-radius: 7px; white-space: nowrap; font-size: 14px; }
.nav a:hover, .nav a.on { color: #fff; background: var(--dark-2); text-decoration: none; }
.top form { position: relative; }
.top input[type=search] { width: 250px; background: var(--dark-2); border: 1px solid #2b323c; color: #fff; border-radius: 8px; padding: 8px 12px; font: inherit; font-size: 14px; }
.top input[type=search]::placeholder { color: #7d8693; }
.burger { display: none; background: none; border: 0; color: #fff; font-size: 22px; cursor: pointer; }

.suggest { position: absolute; top: 42px; right: 0; width: 380px; background: #fff; color: var(--ink); border-radius: 10px; box-shadow: 0 12px 40px rgba(0,0,0,.25); overflow: hidden; display: none; }
.suggest.on { display: block; }
.suggest a { display: block; padding: 8px 14px; color: var(--ink); font-size: 14px; border-top: 1px solid var(--line); }
.suggest a:hover, .suggest a.sel { background: #fff7d6; text-decoration: none; }
.suggest .h { padding: 6px 14px; font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); background: var(--bg); }

/* ── герой ── */
.hero { background: radial-gradient(1200px 400px at 80% -10%, #2a2f38 0%, var(--dark) 60%); color: #fff; padding: 42px 0 54px; }
.hero h1 { font-size: clamp(28px, 4.2vw, 46px); max-width: 780px; }
.hero h1 em { font-style: normal; color: var(--acc); }
.hero p.lead { color: #b9bfc8; font-size: 17px; max-width: 680px; }
.hero .stats { display: flex; gap: 28px; flex-wrap: wrap; margin: 18px 0 0; color: #9aa2ad; font-size: 13px; }
.hero .stats b { display: block; color: #fff; font-size: 22px; font-weight: 700; }

/* ── селектор ── */
.picker { background: var(--card); color: var(--ink); border-radius: 14px; padding: 18px; margin-top: 26px; box-shadow: 0 20px 50px rgba(0,0,0,.35); }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: -4px -4px 16px; padding: 0 4px; flex-wrap: wrap; }
.tabs button { background: none; border: 0; padding: 10px 14px; font: inherit; font-weight: 600; color: var(--ink-2); cursor: pointer; border-bottom: 3px solid transparent; margin-bottom: -1px; }
.tabs button.on { color: var(--ink); border-color: var(--acc); }
.pane { display: none; } .pane.on { display: block; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.chip { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 6px 13px; font: inherit; font-size: 14px; cursor: pointer; color: var(--ink); }
.chip:hover { border-color: #c9ced5; text-decoration: none; }
.chip.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.chip .c { color: var(--ink-3); font-size: 12px; margin-left: 4px; }
.chip.on .c { color: #aab; }
.row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
#picker .row { grid-template-columns: 1fr 1fr 1fr auto; }
.field label { display: block; font-size: 12px; color: var(--ink-3); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .04em; }
select, input[type=text], input[type=number], .inp { width: 100%; padding: 10px 12px; border: 1px solid #cfd4db; border-radius: 8px; font: inherit; background: #fff; color: var(--ink); }
select:disabled { background: var(--bg); color: var(--ink-3); }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 8px; border: 0; background: var(--acc); color: var(--acc-ink); font: inherit; font-weight: 700; cursor: pointer; }
.btn:hover { filter: brightness(.96); text-decoration: none; }
.btn.ghost { background: #fff; border: 1px solid #cfd4db; color: var(--ink); font-weight: 600; }
.variants { margin-top: 14px; display: grid; gap: 6px; }
.variants a { display: flex; justify-content: space-between; gap: 10px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); }
.variants a:hover { border-color: var(--acc); background: #fffbea; text-decoration: none; }
.variants .vh { font-size: 12px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .04em; margin: 8px 0 0; }
.fuel { display: inline-block; font-size: 11px; padding: 1px 7px; border-radius: 999px; background: var(--bg); color: var(--ink-2); margin-left: 6px; vertical-align: 1px; }
.fuel.diesel { background: #e8eef9; color: #2b4f8a; } .fuel.hybrid, .fuel.ev { background: #e6f4ea; color: #276b3a; }

/* ── блоки ── */
main { padding: 26px 0 60px; }
.crumbs { font-size: 13px; color: var(--ink-3); margin-bottom: 12px; }
.crumbs a { color: var(--ink-2); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 20px; }
.grid { display: grid; gap: 14px; }
.g2 { grid-template-columns: repeat(2, 1fr); } .g3 { grid-template-columns: repeat(3, 1fr); } .g4 { grid-template-columns: repeat(4, 1fr); }
.tiles a { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; color: var(--ink); }
.tiles a:hover { border-color: var(--acc); text-decoration: none; box-shadow: 0 4px 14px rgba(0,0,0,.05); }
.tiles a b { display: block; font-size: 15px; }
.tiles a span { font-size: 13px; color: var(--ink-3); }
.cols { columns: 4 200px; column-gap: 24px; }
.cols a { display: block; padding: 3px 0; break-inside: avoid; }
.section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin: 34px 0 12px; }
.section-title h2 { margin: 0; }

/* ── требования к АКБ ── */
.spec { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; }
.spec div { background: var(--bg); border-radius: 8px; padding: 10px 12px; }
.spec small { display: block; font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .05em; }
.spec b { font-size: 17px; }
.note { border-left: 3px solid var(--acc); background: #fffbea; padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 12px 0; }
.note.warn { border-color: #e2932a; background: #fff4e5; }

/* схема полярности */
.pol { display: inline-flex; align-items: center; gap: 0; vertical-align: middle; }
.pol svg { display: block; }

/* ── таблица АКБ ── */
.tbl { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; font-size: 14px; }
.tbl th { text-align: left; font-size: 11px; font-weight: 600; color: var(--ink-3); text-transform: uppercase; letter-spacing: .05em; padding: 9px 10px; background: #fafbfc; border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl td { padding: 9px 10px; border-bottom: 1px solid #eef0f2; vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl tr:hover td { background: #fffdf3; }
.tbl .t { font-weight: 600; }
.tbl .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tbl-wrap { overflow-x: auto; border-radius: var(--r); }
.tag { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 7px; border-radius: 5px; background: #eef0f3; color: var(--ink-2); letter-spacing: .02em; white-space: nowrap; }
.tag.AGM { background: #1d2a44; color: #fff; } .tag.EFB { background: #dbe8ff; color: #123a85; }
.tag.GEL { background: #e5dcff; color: #3d2385; } .tag.LiFePO4, .tag.Li-ion { background: #d8f4e3; color: #0d5a2e; }
.tag.SLA { background: #eef0f3; }
.tag.R { background: #ffe1df; color: #8f1d16; } .tag.L { background: #e2ecff; color: #173e89; }
.flag { font-size: 12px; color: var(--warn); }

/* ── каталог с фильтрами ── */
.layout { display: grid; grid-template-columns: 270px 1fr; gap: 22px; align-items: start; }
.filters { position: sticky; top: 76px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 14px; max-height: calc(100vh - 96px); overflow: auto; }
.filters fieldset { border: 0; padding: 0; margin: 0 0 14px; }
.filters legend { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-2); margin-bottom: 6px; }
.filters .two { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.filters .three { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
.filters input, .filters select { padding: 7px 9px; font-size: 14px; }
.filters .opts { display: flex; flex-wrap: wrap; gap: 5px; }
.filters .opts label { display: inline-flex; align-items: center; gap: 5px; border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; font-size: 13px; cursor: pointer; }
.filters .opts input { width: auto; margin: 0; }
.bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.pager { display: flex; gap: 6px; margin-top: 18px; flex-wrap: wrap; }
.pager a, .pager span { padding: 6px 12px; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
.pager span { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ── статьи ── */
.prose { max-width: 760px; font-size: 16.5px; line-height: 1.7; }
.prose h2 { font-size: 24px; } .prose h3 { font-size: 19px; margin-top: 1.4em; }
.prose table { border-collapse: collapse; margin: 1em 0; font-size: 14.5px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.prose th { background: #fafbfc; }
.prose code { font-family: var(--mono); font-size: .9em; background: #f0f2f4; padding: 1px 5px; border-radius: 4px; }
.prose blockquote { margin: 1em 0; padding: 10px 16px; border-left: 3px solid var(--acc); background: #fffbea; }
.prose li { margin: .3em 0; }
.aside-layout { display: grid; grid-template-columns: 1fr 280px; gap: 36px; align-items: start; }
.toc { position: sticky; top: 76px; font-size: 14px; }
.toc a { display: block; padding: 5px 0; color: var(--ink-2); border-bottom: 1px solid var(--line); }

.criteria { counter-reset: c; display: grid; gap: 12px; }
.criteria .card { position: relative; padding-left: 64px; }
.criteria .card::before { counter-increment: c; content: counter(c); position: absolute; left: 18px; top: 16px; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; background: var(--acc); color: var(--acc-ink); font-weight: 800; }
.criteria ul { margin: .4em 0 0; padding-left: 18px; color: var(--ink-2); }

footer { background: var(--dark); color: #8a929d; padding: 30px 0; font-size: 13px; }
footer a { color: #c6ccd4; }
footer .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

@media (max-width: 960px) {
  .layout, .aside-layout { grid-template-columns: 1fr; }
  .filters { position: static; max-height: none; }
  .g4 { grid-template-columns: repeat(2, 1fr); } .g3 { grid-template-columns: repeat(2, 1fr); }
  .toc { position: static; }
}
@media (max-width: 760px) {
  .top .wrap { height: auto; flex-wrap: wrap; padding: 10px 16px; gap: 10px; }
  .nav { order: 3; width: 100%; flex: none; }
  .top form { flex: 1; } .top input[type=search] { width: 100%; }
  .suggest { width: calc(100vw - 32px); }
  .row, #picker .row, .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .hide-m { display: none; }
  .tbl td, .tbl th { padding: 8px 6px; }
}
.tbl tr.gh td { background: var(--bg); font-weight: 700; font-size: 13px; padding-top: 12px; }