:root {
    --bg: #f6f8fb;
    --surface: #ffffff;
    --border: #e3e8f0;
    --border-strong: #c8d3e2;
    --text: #1a2235;
    --text-muted: #6b7689;
    --accent: #1e6fff;
    --accent-hover: #1857cc;
    --accent-soft: #e8efff;
    --success: #28a745;
    --danger: #d92d2d;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, .08);
    --radius: 10px;
    --radius-sm: 6px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }
code { font-family: "JetBrains Mono", Consolas, Monaco, monospace; font-size: .92em; background: var(--accent-soft); padding: 1px 6px; border-radius: 4px; color: var(--text); }
h1 { font-size: 26px; margin: 0 0 14px; }
h2 { font-size: 20px; margin: 24px 0 12px; }
h3 { font-size: 16px; margin: 0 0 8px; }
.muted { color: var(--text-muted); font-size: 14px; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* Topbar */
.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100;
    box-shadow: var(--shadow-sm);
}
.topbar-inner {
    display: flex; align-items: center; gap: 24px;
    padding: 12px 20px;
}
.brand { font-size: 22px; font-weight: 700; letter-spacing: -.02em; color: var(--text); display: inline-flex; }
.brand:hover { text-decoration: none; }
.brand-mark { display: inline-block; }
.brand-accent { color: var(--accent); }
.topbar-search { flex: 1; display: flex; gap: 8px; max-width: 640px; }
.topbar-search input {
    flex: 1; height: 40px; padding: 0 14px; font-size: 14px;
    border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
    background: var(--bg); color: var(--text); font-family: monospace; letter-spacing: .04em;
}
.topbar-search input:focus { outline: 2px solid var(--accent); outline-offset: -1px; background: #fff; }
.topbar-search button {
    height: 40px; padding: 0 18px; border: 0; border-radius: var(--radius-sm);
    background: var(--accent); color: #fff; cursor: pointer; font-weight: 600; font-size: 14px;
}
.topbar-search button:hover { background: var(--accent-hover); }
.topbar-nav a { font-size: 14px; color: var(--text-muted); }
.topbar-nav a:hover { color: var(--text); }

/* Breadcrumbs */
.breadcrumbs { padding: 12px 0; font-size: 13px; }
.breadcrumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.breadcrumbs li:not(:last-child)::after { content: "/"; color: var(--text-muted); margin-left: 6px; }
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs span { color: var(--text); }

/* Main */
.main { padding: 24px 0 60px; }
.footer { padding: 24px 0; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 13px; background: var(--surface); }

/* Hero */
.hero { text-align: center; padding: 32px 0 20px; }
.hero h1 { font-size: 32px; margin-bottom: 8px; }
.hero-sub { color: var(--text-muted); max-width: 640px; margin: 0 auto 28px; }
.vin-form { max-width: 640px; margin: 0 auto; }
.vin-input { display: flex; gap: 8px; }
.vin-input input {
    flex: 1; height: 56px; padding: 0 18px; font-size: 18px;
    border: 1px solid var(--border-strong); border-radius: var(--radius);
    background: #fff; font-family: monospace; letter-spacing: .04em;
    box-shadow: var(--shadow-sm);
}
.vin-input input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.vin-input button {
    height: 56px; padding: 0 28px; border: 0; border-radius: var(--radius);
    background: var(--accent); color: #fff; cursor: pointer; font-weight: 600; font-size: 16px;
}
.vin-input button:hover { background: var(--accent-hover); }
.vin-filter { margin-top: 16px; text-align: left; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.vin-filter summary { cursor: pointer; font-weight: 600; font-size: 14px; }
.vin-catalogs { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 8px; }
.catalog-chip { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; font-size: 13px; background: var(--bg); border: 1px solid var(--border); border-radius: 999px; cursor: pointer; }
.catalog-chip input { margin: 0; }
.catalog-chip:has(input:checked) { background: var(--accent-soft); border-color: var(--accent); }
.vin-hint { color: var(--text-muted); font-size: 12px; margin: 6px 0 0; }

/* Catalogs */
.catalogs-block { margin-top: 48px; }
.catalogs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    margin-top: 16px;
}
.catalog-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px; color: var(--text);
    transition: transform .12s, box-shadow .12s, border-color .12s;
}
.catalog-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-1px); text-decoration: none; }
.catalog-card-name { font-weight: 600; font-size: 16px; }
.catalog-card-meta { display: flex; gap: 10px; color: var(--text-muted); font-size: 12px; margin-top: 6px; }

/* Models */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
    margin-top: 12px;
}
.model-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 12px; color: var(--text);
    display: flex; flex-direction: column; gap: 10px;
    transition: transform .12s, box-shadow .12s, border-color .12s;
}
.model-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-1px); text-decoration: none; }
.model-card-img { aspect-ratio: 4/3; object-fit: contain; background: var(--bg); border-radius: var(--radius-sm); }
.model-card-noimg { display: flex; align-items: center; justify-content: center; color: var(--border-strong); }
.model-card-noimg svg { opacity: .55; }
.model-card:hover .model-card-noimg svg { opacity: .85; color: var(--accent); }
.model-card-name { font-weight: 600; font-size: 14px; line-height: 1.3; }

/* Cars */
.cars-layout { display: grid; grid-template-columns: 280px 1fr; gap: 20px; }
@media (max-width: 800px) { .cars-layout { grid-template-columns: 1fr; } }
.cars-filters { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; height: fit-content; position: sticky; top: 80px; }
.cars-filters h3 { margin-top: 0; }
.filter-form .filter-group { border: 0; padding: 0; margin: 0 0 14px; }
.filter-form legend { font-weight: 600; font-size: 13px; padding: 0; margin-bottom: 6px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.filter-chk { display: flex; gap: 6px; align-items: center; padding: 4px 0; cursor: pointer; font-size: 13px; }
.filter-chk:hover { color: var(--accent); }
.filter-actions { display: flex; gap: 12px; align-items: center; padding-top: 8px; border-top: 1px solid var(--border); }
.cars-list-wrap { min-width: 0; }
.cars-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.car-card {
    display: block;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px; color: var(--text);
    transition: border-color .12s, box-shadow .12s, transform .12s;
}
.car-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-1px); text-decoration: none; }
.car-card-title { font-weight: 600; font-size: 15px; }
.car-card-meta { display: flex; gap: 8px; margin-top: 4px; font-size: 12px; color: var(--text-muted); }
.car-card-brand { background: var(--accent-soft); color: var(--accent); padding: 1px 8px; border-radius: 4px; font-weight: 600; }
.car-card-desc { color: var(--text-muted); font-size: 13px; margin-top: 6px; }
.car-params { list-style: none; padding: 0; margin: 8px 0 0; font-size: 12px; color: var(--text-muted); }
.car-params li { padding: 1px 0; }
.car-params span { font-weight: 600; color: var(--text); }

/* Pagination */
.pagination { margin-top: 18px; display: flex; gap: 16px; align-items: center; justify-content: center; font-size: 14px; }

/* Filter input */
.filter-input {
    width: 100%; height: 40px; padding: 0 14px; font-size: 14px;
    border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
    background: #fff; margin-bottom: 14px;
}
.filter-input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

/* Groups */
.groups-page { }
.car-header { display: flex; gap: 24px; align-items: flex-start; flex-wrap: wrap; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.car-header > div:first-child { flex: 1; min-width: 0; }
.search-wrap { position: relative; min-width: 280px; }
.suggest-list {
    position: absolute; top: 100%; left: 0; right: 0; z-index: 50;
    background: #fff; border: 1px solid var(--border); border-top: 0;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    list-style: none; padding: 0; margin: 0; max-height: 320px; overflow-y: auto;
    box-shadow: var(--shadow-md);
}
.suggest-list li { padding: 8px 14px; cursor: pointer; font-size: 14px; }
.suggest-list li:hover, .suggest-list li.active { background: var(--accent-soft); color: var(--accent); }

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}
.group-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden; color: var(--text);
    transition: transform .12s, box-shadow .12s, border-color .12s;
    display: flex; flex-direction: column;
}
.group-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-1px); text-decoration: none; }
.group-card-img { aspect-ratio: 1/1; object-fit: contain; background: var(--bg); padding: 8px; }
.group-card-noimg { display: flex; align-items: center; justify-content: center; color: var(--border-strong); }
.group-card-noimg svg { opacity: .55; }
.group-card:hover .group-card-noimg svg { opacity: .85; color: var(--accent); }
.group-card-body { padding: 10px 12px; flex: 1; display: flex; flex-direction: column; gap: 4px; }
.group-card-name { font-weight: 600; font-size: 14px; line-height: 1.3; }
.group-card-badge { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; align-self: flex-start; }
.group-card-leaf .group-card-badge { background: var(--accent-soft); color: var(--accent); padding: 1px 6px; border-radius: 3px; font-weight: 600; }

/* Parts */
.parts-page { }
.parts-header { margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.parts-header h1 { margin-bottom: 4px; }
.parts-layout { display: grid; grid-template-columns: minmax(320px, 1fr) 1.4fr; gap: 24px; }
@media (max-width: 900px) { .parts-layout { grid-template-columns: 1fr; } }

.parts-figure { margin: 0; position: sticky; top: 80px; display: flex; flex-direction: column; }
.parts-figure-inner {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    height: calc(100vh - 100px);
}

/* Zoom toolbar */
.parts-zoom-toolbar {
    display: flex;
    gap: 4px;
    padding: 6px 8px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    align-items: center;
    flex-shrink: 0;
}
.parts-zoom-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-strong);
    background: #fff;
    color: var(--text);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background .12s, border-color .12s, color .12s;
}
.parts-zoom-btn:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.parts-zoom-btn:active { transform: translateY(1px); }
.parts-zoom-btn-fs { margin-left: auto; }
.parts-zoom-pct {
    margin: 0 8px;
    font-size: 12px;
    color: var(--text-muted);
    min-width: 42px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* Zoom stage */
.parts-zoom-stage {
    position: relative;
    flex: 1;
    overflow: hidden;
    cursor: grab;
    user-select: none;
    touch-action: none;
    background-color: #fcfcfd;
    background-image:
        linear-gradient(45deg, #f0f2f5 25%, transparent 25%),
        linear-gradient(-45deg, #f0f2f5 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f2f5 75%),
        linear-gradient(-45deg, transparent 75%, #f0f2f5 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}
.parts-zoom-stage.is-dragging { cursor: grabbing; }
.parts-zoom-stage:fullscreen { background-color: #fff; }

.parts-zoom-content {
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: 0 0;
    transition: transform .18s ease-out;
    will-change: transform;
}
.parts-zoom-content.is-dragging { transition: none; }
.parts-zoom-content img {
    display: block;
    max-width: none;
    pointer-events: none;
    -webkit-user-drag: none;
    user-select: none;
}

/* Маркеры — фиксированный визуальный размер независимо от zoom */
.parts-marker {
    position: absolute;
    width: 26px;
    height: 26px;
    margin-left: -13px;
    margin-top: -13px;
    background: rgba(30, 111, 255, 0.94);
    color: #fff;
    border: 2px solid #fff;
    border-radius: 50%;
    padding: 0;
    cursor: pointer;
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
    box-shadow: 0 2px 5px rgba(0,0,0,.35);
    display: flex;
    align-items: center;
    justify-content: center;
    transform-origin: center;
    transform: scale(calc(1 / var(--zoom, 1)));
    transition: background .12s, box-shadow .12s;
    z-index: 2;
}
.parts-marker:hover, .parts-marker.active {
    background: var(--danger);
    box-shadow: 0 3px 8px rgba(217, 45, 45, .5);
    z-index: 10;
}

/* Hint at bottom of stage */
.parts-zoom-hint {
    position: absolute;
    left: 50%;
    bottom: 10px;
    transform: translateX(-50%);
    font-size: 11px;
    color: var(--text-muted);
    background: rgba(255,255,255,.85);
    padding: 4px 10px;
    border-radius: 12px;
    pointer-events: none;
    transition: opacity .3s;
    backdrop-filter: blur(4px);
}
.parts-zoom-hint.fade { opacity: 0; }
@media (hover: none) {
    .parts-zoom-hint { display: none; }
}

.parts-list { min-width: 0; }
.parts-group { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.parts-group-header { display: flex; gap: 10px; align-items: center; padding: 12px 16px; background: var(--bg); border-bottom: 1px solid var(--border); }
.parts-group-header h3 { margin: 0; font-size: 15px; }
.parts-pos-badge { display: inline-flex; align-items: center; justify-content: center; min-width: 26px; height: 26px; padding: 0 6px; background: var(--accent); color: #fff; border-radius: 4px; font-weight: 700; font-size: 12px; cursor: pointer; }
.parts-group-desc { padding: 8px 16px 0; }

.parts-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.parts-table th, .parts-table td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.parts-table th { background: var(--bg); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); }
.parts-table tr.part-row.highlight { background: #fff7d6; }
.part-number { cursor: pointer; user-select: all; font-weight: 600; }
.part-number:hover { background: var(--accent); color: #fff; }

/* Buttons + misc */
.btn { display: inline-flex; align-items: center; padding: 10px 18px; background: var(--accent); color: #fff; border: 0; border-radius: var(--radius-sm); cursor: pointer; font-weight: 600; font-size: 14px; }
.btn:hover { background: var(--accent-hover); text-decoration: none; color: #fff; }

.empty { background: var(--surface); border: 1px dashed var(--border-strong); padding: 32px; border-radius: var(--radius); text-align: center; color: var(--text-muted); }
.error-page { max-width: 480px; margin: 60px auto; text-align: center; background: var(--surface); border: 1px solid var(--border); padding: 36px; border-radius: var(--radius); }

.toast {
    position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%);
    background: var(--text); color: #fff; padding: 10px 18px; border-radius: 999px;
    font-size: 14px; box-shadow: var(--shadow-md); z-index: 1000;
    animation: toastIn .2s ease-out;
}
@keyframes toastIn { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }

@media (max-width: 700px) {
    .topbar-inner { flex-wrap: wrap; gap: 12px; }
    .topbar-search { order: 3; flex-basis: 100%; max-width: none; }
    .hero h1 { font-size: 24px; }
    h1 { font-size: 22px; }
    .vin-input input { font-size: 16px; }
}