:root {
    --bg: #dfe6ee;
    --panel: #eef3f8;
    --panel-strong: #dfe8f2;
    --panel-dark: #d7dfe8;
    --primary: #0a3d8f;
    --primary-soft: #0d5ec7;
    --header-blue: #173a7a;
    --text: #1d2431;
    --muted: #4a586d;
    --line: #b8c3d3;
    --selected: #b9d0f7;
    --selected-text: #0d1f3a;
    --white: #ffffff;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.topbar {
    background: #f3f6fa;
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
}
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 72px;
}
.brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
}
.nav-links {
    display: flex;
    gap: 18px;
}
.nav-links a {
    color: var(--text);
    text-decoration: none;
    opacity: .9;
}
.page-shell {
    padding: 18px 20px 40px;
}
.hero {
    background: linear-gradient(135deg, #f5f8fc, #edf3f8);
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 22px;
    margin-bottom: 18px;
}
.hero h1 {
    margin: 0 0 12px;
    font-size: clamp(2rem, 4vw, 3.5rem);
    color: var(--primary);
}
.hero p {
    color: var(--muted);
    max-width: 700px;
}
.search-box {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}
.search-box input, .search-box button {
    border-radius: 4px;
    border: 1px solid var(--line);
    font-size: 1rem;
    padding: 12px 14px;
}
.search-box input {
    flex: 1 1 340px;
    background: var(--white);
    color: var(--text);
}
.search-box button {
    background: var(--primary);
    color: #fff;
    cursor: pointer;
}
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}
.card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 18px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.45);
}
.card h3 { margin-top: 0; }
.card p { color: var(--muted); }
.badge {
    display: inline-block;
    background: #d4e3ff;
    color: var(--primary);
    border: 1px solid var(--line);
    border-radius: 3px;
    padding: 6px 10px;
    font-size: .8rem;
    font-weight: 700;
}
.btn-link {
    display: inline-block;
    margin-top: 12px;
    padding: 9px 12px;
    border-radius: 4px;
    background: #eaf1ff;
    color: var(--primary);
    text-decoration: none;
    border: 1px solid var(--line);
    font-weight: 700;
}
.autodata-page {
    background: #dfe5ee;
    border: 1px solid var(--line);
    border-radius: 4px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.7);
    padding: 0 0 18px;
}
.vehicle-switcher {
    background: #f3f7ff;
    border: 1px solid var(--line);
    border-radius: 4px;
    margin: 12px 10px 0;
    padding: 10px 12px;
}
.switcher-title {
    font-size: .72rem;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.switcher-form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}
.switcher-form select,
.switcher-form button {
    border-radius: 4px;
    border: 1px solid var(--line);
    padding: 8px 10px;
    font-size: .95rem;
}
.switcher-form select {
    min-width: 170px;
    background: var(--white);
}
.switcher-form button {
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-weight: 700;
}
.quick-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}
.mini-link {
    display: inline-block;
    text-decoration: none;
    background: #e8f0ff;
    border: 1px solid var(--line);
    color: var(--primary);
    border-radius: 999px;
    padding: 5px 10px;
    font-size: .76rem;
    font-weight: 700;
}
.mini-link.active {
    background: var(--selected);
    color: var(--selected-text);
}
.autodata-window {
    background: #eef2f8;
    border: 1px solid var(--line);
    margin: 8px;
}
.autodata-header {
    background: linear-gradient(180deg, #1b3e7f 0%, #13386d 100%);
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    padding: 6px 12px;
    border-bottom: 1px solid #0f2b5d;
}
.autodata-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin: 8px 10px 0;
    padding: 6px 8px;
    background: #dfeaf8;
    border: 1px solid var(--line);
    font-size: .72rem;
    color: var(--primary);
    font-weight: 700;
}
.tool-pill {
    display: inline-block;
    border: 1px solid var(--line);
    background: #f5f9ff;
    padding: 4px 8px;
    border-radius: 2px;
    min-width: 42px;
    text-align: center;
}
.ok-pill {
    background: #dfeaff;
}
.vehicle-data-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-height: 27px;
    border: 1px solid var(--line);
    background: #f8fbff;
    color: var(--text);
    padding: 4px 9px;
    border-radius: 2px;
    font-size: .72rem;
    white-space: nowrap;
}
.vehicle-data-pill strong {
    color: var(--primary);
}
.vehicle-data-primary {
    background: #c9dcf8;
    color: var(--selected-text);
    font-size: .8rem;
}
.autodata-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(180px, 1fr));
    gap: 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    margin-top: 10px;
}
.autodata-panel {
    background: #f4f6fa;
    border-right: 1px solid var(--line);
    min-height: 260px;
}
.autodata-panel:last-child { border-right: none; }
.autodata-panel-title {
    background: #dfeaf8;
    font-size: .8rem;
    font-weight: 700;
    color: var(--primary);
    border-bottom: 1px solid var(--line);
    padding: 6px 10px;
    text-transform: uppercase;
}
.autodata-panel ul {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 220px;
    overflow: auto;
}
.autodata-panel li {
    padding: 0;
    border-bottom: 1px solid rgba(184,195,211,.9);
    font-size: .78rem;
    color: var(--text);
    background: transparent;
}
.autodata-panel li a {
    display: block;
    width: 100%;
    padding: 5px 10px;
    color: var(--text);
    text-decoration: none;
}
.autodata-panel li.selected {
    background: var(--selected);
    color: var(--selected-text);
    font-weight: 700;
}
.autodata-panel li.selected a {
    color: var(--selected-text);
    font-weight: 700;
}
.autodata-panel li.engine-empty {
    padding: 10px;
    color: var(--muted);
    font-size: .72rem;
    font-style: italic;
}
.autodata-table {
    background: #f8fafc;
    border: 1px solid var(--line);
    margin: 12px 10px 10px;
}
.autodata-table-header, .autodata-row {
    display: grid;
    grid-template-columns: 1.2fr 1.6fr 1.2fr 1fr;
    gap: 0;
    font-size: .78rem;
}
.autodata-table-header {
    background: #dfeaf8;
    color: var(--primary);
    font-weight: 700;
    border-bottom: 1px solid var(--line);
}
.autodata-table-header span,
.autodata-row span {
    padding: 7px 10px;
    border-right: 1px solid var(--line);
}
.autodata-table-header span:last-child,
.autodata-row span:last-child { border-right: none; }
.autodata-row {
    border-bottom: 1px solid var(--line);
    background: #fff;
}
.autodata-row a,
a.autodata-row {
    color: var(--text);
    text-decoration: none;
}
.autodata-row:hover,
.autodata-row:focus {
    background: #edf4ff;
}
.autodata-row small {
    color: var(--muted);
    font-size: .68rem;
}
.autodata-row.selected-row {
    background: #dfeaff;
}
.technical-tree {
    margin: 14px 10px 0;
    border: 1px solid var(--line);
    background: #f3f6fa;
}
.technical-tree-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 12px 14px;
    background: #dfeaf8;
    border-bottom: 1px solid var(--line);
}
.technical-tree-kicker {
    display: block;
    color: var(--muted);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.technical-tree h2 {
    margin: 3px 0 0;
    color: var(--primary);
    font-size: 1.05rem;
}
.technical-tree-engine {
    border: 1px solid #9db4d4;
    background: #fff;
    color: var(--primary);
    padding: 6px 9px;
    font-size: .8rem;
    font-weight: 700;
}
.technical-tree-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
.technical-section {
    min-height: 154px;
    padding: 12px 14px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}
.technical-section:nth-child(3n) { border-right: none; }
.technical-section h3 {
    display: flex;
    align-items: center;
    gap: 7px;
    margin: 0 0 8px;
    color: var(--primary);
    font-size: .88rem;
    text-transform: uppercase;
}
.technical-section h3 span {
    width: 22px;
    text-align: center;
    font-size: 1rem;
}
.technical-section ul {
    display: grid;
    gap: 4px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.technical-section a {
    color: var(--text);
    font-size: .82rem;
    text-decoration: none;
}
.technical-section a::before {
    content: '├ ';
    color: var(--muted);
}
.technical-section a:hover,
.technical-section a:focus {
    color: var(--primary-soft);
    text-decoration: underline;
}
@media (max-width: 900px) {
    .technical-tree-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .technical-section:nth-child(3n) { border-right: 1px solid var(--line); }
    .technical-section:nth-child(2n) { border-right: none; }
}
@media (max-width: 620px) {
    .technical-tree-header { align-items: flex-start; flex-direction: column; }
    .technical-tree-grid { grid-template-columns: 1fr; }
    .technical-section,
    .technical-section:nth-child(2n),
    .technical-section:nth-child(3n) { border-right: none; }
}
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 24px;
    background: rgba(255,255,255,.5);
}
.table th, .table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--line);
    text-align: left;
}
.form {
    display: grid;
    gap: 16px;
    max-width: 640px;
}
.form input, .form select, .form textarea {
    width: 100%;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.02);
    color: var(--text);
    border-radius: 12px;
    padding: 12px 14px;
}
.footer {
    border-top: 1px solid var(--border);
    padding: 18px 0 40px;
    color: var(--muted);
}
@media (max-width: 720px) {
    .nav {
        flex-direction: column;
        padding: 14px 0;
    }
    .nav-links {
        width: 100%;
        justify-content: space-between;
        gap: 10px;
        font-size: .9rem;
    }
    .hero { padding: 22px; }
}