/* DEKRA DataCar Design System
   Colors: Green, White, Gray - No shadows
   Font: Noto Sans */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans:wght@300;400;500;600;700&display=swap');

:root {
    --dekra-green: #00963f;
    --dekra-green-light: #6bbd45;
    --dekra-green-dark: #007a33;
    --dekra-white: #ffffff;
    --dekra-gray-50: #f7f7f7;
    --dekra-gray-100: #f0f0f0;
    --dekra-gray-200: #e5e5e5;
    --dekra-gray-300: #d4d4d4;
    --dekra-gray-400: #a3a3a3;
    --dekra-gray-500: #737373;
    --dekra-gray-600: #525252;
    --dekra-gray-700: #404040;
    --dekra-gray-800: #262626;
    --dekra-gray-900: #171717;
    --dekra-text: #333333;
    --dekra-text-light: #666666;
    --dekra-border: #e5e5e5;
    --dekra-bg: #f5f5f5;
    --dekra-danger: #dc2626;
    --dekra-warning: #f59e0b;
    --dekra-info: #3b82f6;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Noto Sans', sans-serif;
    color: var(--dekra-text);
    background: var(--dekra-bg);
    font-size: 14px;
    line-height: 1.5;
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: 240px;
    background: var(--dekra-white);
    border-right: 1px solid var(--dekra-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-brand {
    padding: 20px;
    border-bottom: 1px solid var(--dekra-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-brand img {
    height: 32px;
}

.sidebar-brand span {
    font-weight: 600;
    font-size: 15px;
    color: var(--dekra-green);
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
    overflow-y: auto;
}

.sidebar-section {
    padding: 8px 20px 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--dekra-gray-400);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    color: var(--dekra-gray-600);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}

.sidebar-link:hover {
    background: var(--dekra-gray-50);
    color: var(--dekra-green);
}

.sidebar-link.active {
    color: var(--dekra-green);
    background: rgba(0, 150, 63, 0.05);
    border-left-color: var(--dekra-green);
    font-weight: 600;
}

.sidebar-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* --- Main Content --- */
.main-content {
    margin-left: 240px;
    min-height: 100vh;
}

.topbar {
    background: var(--dekra-white);
    border-bottom: 1px solid var(--dekra-border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--dekra-gray-800);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.page-content {
    padding: 24px;
}

/* --- Cards --- */
.card {
    background: var(--dekra-white);
    border: 1px solid var(--dekra-border);
    border-radius: 6px;
    padding: 20px;
    margin-bottom: 16px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--dekra-gray-100);
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--dekra-gray-800);
}

/* --- KPI Cards --- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--dekra-white);
    border: 1px solid var(--dekra-border);
    border-radius: 6px;
    padding: 16px 20px;
}

.kpi-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--dekra-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-bottom: 4px;
}

.kpi-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--dekra-gray-800);
}

.kpi-value.green { color: var(--dekra-green); }

.kpi-sub {
    font-size: 12px;
    color: var(--dekra-gray-400);
    margin-top: 2px;
}

/* --- Tables --- */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    background: var(--dekra-gray-50);
    padding: 10px 12px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--dekra-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-bottom: 1px solid var(--dekra-border);
}

tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--dekra-gray-100);
    font-size: 13px;
}

tbody tr:hover {
    background: var(--dekra-gray-50);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid transparent;
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
}

.btn-primary {
    background: var(--dekra-green);
    color: var(--dekra-white);
    border-color: var(--dekra-green);
}

.btn-primary:hover {
    background: var(--dekra-green-dark);
    border-color: var(--dekra-green-dark);
}

.btn-secondary {
    background: var(--dekra-white);
    color: var(--dekra-gray-600);
    border-color: var(--dekra-gray-300);
}

.btn-secondary:hover {
    background: var(--dekra-gray-50);
    color: var(--dekra-gray-800);
}

.btn-danger {
    background: var(--dekra-danger);
    color: var(--dekra-white);
    border-color: var(--dekra-danger);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

/* --- Forms --- */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--dekra-gray-700);
    margin-bottom: 4px;
}

.form-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--dekra-gray-300);
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    color: var(--dekra-text);
    background: var(--dekra-white);
    transition: border-color 0.15s;
}

.form-input:focus {
    outline: none;
    border-color: var(--dekra-green);
}

/* --- Badges --- */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
}

.badge-green {
    background: rgba(0, 150, 63, 0.1);
    color: var(--dekra-green);
}

.badge-red {
    background: rgba(220, 38, 38, 0.1);
    color: var(--dekra-danger);
}

.badge-gray {
    background: var(--dekra-gray-100);
    color: var(--dekra-gray-600);
}

.badge-blue {
    background: rgba(59, 130, 246, 0.1);
    color: var(--dekra-info);
}

.badge-yellow {
    background: rgba(245, 158, 11, 0.1);
    color: var(--dekra-warning);
}

/* --- Status Indicators --- */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.status-dot.online { background: var(--dekra-green); }
.status-dot.offline { background: var(--dekra-gray-300); }
.status-dot.error { background: var(--dekra-danger); }
.status-dot.warning { background: var(--dekra-warning); }

/* --- Grid --- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 16px; }

/* --- Login Page --- */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--dekra-bg);
}

.login-card {
    background: var(--dekra-white);
    border: 1px solid var(--dekra-border);
    border-radius: 8px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.login-logo {
    text-align: center;
    margin-bottom: 24px;
}

.login-logo img {
    height: 40px;
}

.login-title {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--dekra-gray-800);
    margin-bottom: 24px;
}

/* --- Alerts --- */
.alert {
    padding: 12px 16px;
    border-radius: 4px;
    margin-bottom: 16px;
    font-size: 13px;
    border: 1px solid;
}

.alert-error {
    background: rgba(220, 38, 38, 0.05);
    border-color: rgba(220, 38, 38, 0.2);
    color: var(--dekra-danger);
}

.alert-success {
    background: rgba(0, 150, 63, 0.05);
    border-color: rgba(0, 150, 63, 0.2);
    color: var(--dekra-green);
}

/* --- Tabs --- */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--dekra-border);
    margin-bottom: 20px;
}

.tab {
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--dekra-gray-500);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
}

.tab:hover { color: var(--dekra-gray-700); }

.tab.active {
    color: var(--dekra-green);
    border-bottom-color: var(--dekra-green);
}

/* --- Empty States --- */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--dekra-gray-400);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main-content { margin-left: 0; }
    .kpi-grid { grid-template-columns: 1fr 1fr; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}