:root {
    --brand: #0F172A;
    --brand-light: #1E293B;
    --accent: #2563EB;
    --accent-light: #DBEAFE;
    --success: #16A34A;
    --success-light: #DCFCE7;
    --danger: #DC2626;
    --danger-light: #FEE2E2;
    --warning: #EA580C;
    --warning-light: #FFEDD5;
    --bg: #F1F5F9;
    --border: #E2E8F0;
    --text-muted: #64748B;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--brand);
}

a { text-decoration: none; color: inherit; }

.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
    width: 250px;
    background: var(--brand);
    color: #CBD5E1;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.brand-name {
    color: #fff;
    font-weight: 700;
    letter-spacing: 0.5px;
    font-size: 15px;
}

.brand-tagline {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #64748B;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.sidebar-nav a {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #CBD5E1;
}

.sidebar-nav a:hover {
    background: rgba(255,255,255,0.06);
    color: #fff;
}

.sidebar-nav a.active {
    background: var(--accent);
    color: #fff;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.user-name { color: #fff; font-size: 13px; font-weight: 500; }
.user-role { color: #64748B; font-size: 11px; text-transform: capitalize; }

.logout-link {
    display: block;
    font-size: 13px;
    color: #94A3B8;
    margin-bottom: 8px;
}
.logout-link:hover { color: #fff; }

.copyright { font-size: 10px; color: #475569; }

/* ---------- Main area ---------- */
.main-area {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: 64px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
}

.search-form { flex: 1; max-width: 480px; }
.search-form input {
    width: 100%;
    padding: 9px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    font-size: 14px;
}
.search-form input:focus { outline: 2px solid var(--accent); background: #fff; }

.topbar-right { margin-left: auto; }
.user-chip { font-size: 13px; color: var(--text-muted); }

.page-content {
    padding: 24px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* ---------- Page header ---------- */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.page-header h1 { margin: 0 0 4px; font-size: 24px; }
.page-header p { margin: 0; color: var(--text-muted); font-size: 14px; }

/* ---------- Cards ---------- */
.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid #F1F5F9;
}

.card-header h3 { margin: 0; font-size: 15px; }
.card-body { padding: 20px; }
.card-link { font-size: 12px; color: var(--accent); }

/* ---------- Summary cards grid ---------- */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.summary-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    gap: 12px;
}

.summary-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.icon-accent { background: var(--accent-light); color: var(--accent); }
.icon-success { background: var(--success-light); color: var(--success); }
.icon-warning { background: var(--warning-light); color: var(--warning); }

.summary-label { font-size: 12px; color: var(--text-muted); }
.summary-value { font-size: 20px; font-weight: 700; }
.summary-sub { font-size: 11px; color: #94A3B8; }

/* ---------- Tables ---------- */
table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th {
    text-align: left;
    padding: 10px 14px;
    background: #F8FAFC;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 12px 14px;
    border-bottom: 1px solid #F1F5F9;
}

.data-table tr:hover td { background: #F8FAFC; }

/* ---------- Badges ---------- */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-accent { background: var(--accent-light); color: var(--accent); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-slate { background: #F1F5F9; color: var(--text-muted); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #1D4ED8; }
.btn-dark { background: var(--brand); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: #fff; border: 1px solid var(--border); color: var(--brand); }
.btn-sm { padding: 6px 10px; font-size: 12px; }

/* ---------- Forms ---------- */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; font-weight: 500; color: #334155; }
.form-group input,
.form-group select,
.form-group textarea {
    padding: 9px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 14px;
    font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { outline: 2px solid var(--accent); }

.form-full { grid-column: 1 / -1; }

/* ---------- Alerts ---------- */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
}
.alert-success { background: var(--success-light); color: var(--success); }
.alert-danger { background: var(--danger-light); color: var(--danger); }

/* ---------- Filters / tabs ---------- */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
}
.tabs a {
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}
.tabs a.active { color: var(--accent); border-color: var(--accent); }

.filter-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.filter-bar input,
.filter-bar select {
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 13px;
}

/* ---------- Vehicle grid cards ---------- */
.vehicle-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}
.vehicle-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: box-shadow 0.15s;
}
.vehicle-card:hover { box-shadow: 0 4px 16px rgba(15,23,42,0.08); }
.vehicle-thumb {
    height: 130px;
    background: #F1F5F9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #CBD5E1;
    font-size: 12px;
}
.vehicle-thumb img { width: 100%; height: 100%; object-fit: cover; }
.vehicle-body { padding: 14px; }
.vehicle-title { font-weight: 600; margin: 0 0 4px; font-size: 15px; }
.vehicle-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.vehicle-price { font-size: 17px; font-weight: 700; }

/* ---------- Timeline ---------- */
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: flex; gap: 10px; margin-bottom: 16px; }
.timeline-dot { width: 12px; height: 12px; border-radius: 50%; background: #CBD5E1; margin-top: 4px; flex-shrink: 0; }
.timeline-dot.done { background: var(--accent); }
.timeline-label { font-size: 14px; font-weight: 500; }
.timeline-date { font-size: 12px; color: #94A3B8; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .sidebar {
        position: fixed;
        z-index: 40;
        height: 100vh;
        transform: translateX(-100%);
        transition: transform 0.2s;
    }
    .sidebar.open { transform: translateX(0); }
    .menu-toggle { display: block; }
}