/** Material You Design System **/
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Material You Color Palette - Dark Theme */
    --md-primary: #a8c7fa;
    --md-on-primary: #062e6f;
    --md-primary-container: #004a77;
    --md-on-primary-container: #d3e3fd;
    
    --md-secondary: #bec6dc;
    --md-on-secondary: #283141;
    --md-secondary-container: #3e4758;
    --md-on-secondary-container: #dae2f9;
    
    --md-surface: #111318;
    --md-surface-dim: #111318;
    --md-surface-container: #1d2024;
    --md-surface-container-low: #191c20;
    --md-surface-container-high: #282a2e;
    --md-on-surface: #e2e2e6;
    --md-on-surface-variant: #c4c6d0;
    
    --md-outline: #8e9099;
    --md-outline-variant: #44474e;
    
    --md-error: #ffb4ab;
    --md-error-container: #93000a;
    
    --md-tertiary: #efb8c8;
    --md-tertiary-container: #633b48;
    
    /* Elevation shadows - darker for dark mode */
    --md-elevation-1: 0 1px 3px 1px rgba(0,0,0,0.5), 0 1px 2px rgba(0,0,0,0.6);
    --md-elevation-2: 0 2px 6px 2px rgba(0,0,0,0.5), 0 1px 2px rgba(0,0,0,0.6);
    --md-elevation-3: 0 4px 8px 3px rgba(0,0,0,0.5), 0 1px 3px rgba(0,0,0,0.6);
    
    /* Typography */
    --md-font: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Shape */
    --md-radius-sm: 8px;
    --md-radius-md: 12px;
    --md-radius-lg: 16px;
    --md-radius-xl: 28px;
}

body {
    font-family: var(--md-font);
    background-color: var(--md-surface);
    color: var(--md-on-surface);
    line-height: 1.5;
}

/* Dashboard Container */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

/* Header */
.dashboard-header {
    text-align: center;
    padding: 32px 24px;
    background: var(--md-primary-container);
    border-radius: var(--md-radius-xl);
    margin-bottom: 24px;
    position: relative;
}

.dashboard-header h1 {
    font-size: 2rem;
    font-weight: 400;
    color: var(--md-on-primary-container);
    margin-bottom: 4px;
}

.dashboard-header p {
    color: var(--md-on-primary-container);
    opacity: 0.8;
    font-size: 0.95rem;
}

.test-data-link {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--md-primary);
    color: var(--md-on-primary);
    padding: 10px 24px;
    border-radius: var(--md-radius-xl);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: var(--md-elevation-1);
}

.test-data-link:hover {
    box-shadow: var(--md-elevation-2);
    text-decoration: none;
}

/* Navigation Tabs - Material You Chips */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    padding: 8px 0;
}

.tab-btn {
    padding: 10px 20px;
    background: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    color: var(--md-on-surface);
    cursor: pointer;
    border-radius: var(--md-radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--md-font);
    transition: all 0.2s ease;
    width: auto;
    height: auto;
}

.tab-btn:hover {
    background: var(--md-secondary-container);
}

.tab-btn.active {
    background: var(--md-secondary-container);
    border-color: transparent;
    color: var(--md-on-secondary-container);
}

/* Filters - Material Card */
.filters {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    padding: 16px 24px;
    background: var(--md-surface-container-low);
    border-radius: var(--md-radius-lg);
    flex-wrap: wrap;
    align-items: center;
}

.filters select,
.filters input {
    padding: 12px 16px;
    border: 1px solid var(--md-outline-variant);
    background: var(--md-surface);
    color: var(--md-on-surface);
    border-radius: var(--md-radius-sm);
    font-size: 0.875rem;
    font-family: var(--md-font);
    width: auto;
    min-width: 140px;
    transition: border-color 0.2s;
}

.filters select:focus,
.filters input:focus {
    outline: none;
    border-color: var(--md-primary);
    border-width: 2px;
}

.filter-btn {
    padding: 12px 24px;
    background: var(--md-primary);
    color: var(--md-on-primary);
    border: none;
    border-radius: var(--md-radius-xl);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.875rem;
    font-family: var(--md-font);
    transition: all 0.2s ease;
    box-shadow: var(--md-elevation-1);
    width: auto;
    height: auto;
}

.filter-btn:hover {
    box-shadow: var(--md-elevation-2);
}

/* Main Content - Material Card */
main, #content {
    background: var(--md-surface-container-low);
    padding: 24px;
    border-radius: var(--md-radius-lg);
    min-height: 400px;
}

main h2, #content h2 {
    color: var(--md-on-surface);
    font-weight: 400;
    font-size: 1.5rem;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--md-outline-variant);
}

/* Overflow for tables */
.overflow {
    overflow-x: auto;
}

/* Tables - Material Data Table */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 8px;
    display: table;
    text-align: left;
    background: var(--md-surface);
    border-radius: var(--md-radius-md);
    overflow: hidden;
    box-shadow: var(--md-elevation-1);
}

thead {
    background: var(--md-surface-container-high);
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--md-outline-variant);
}

th {
    color: var(--md-on-surface-variant);
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background-color: var(--md-surface-container-high);
}

tbody tr {
    transition: background-color 0.15s;
}

tbody tr:hover {
    background-color: var(--md-surface-container);
}

tbody tr:last-child td {
    border-bottom: none;
}

/* Severity badges - Material Chips */
.badge {
    padding: 4px 12px;
    border-radius: var(--md-radius-xl);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: capitalize;
}

.badge.low {
    background: #1b4332;
    color: #74c69d;
}

.badge.medium {
    background: #5c4813;
    color: #ffd966;
}

.badge.high {
    background: var(--md-error-container);
    color: var(--md-error);
}

/* Row highlighting */
tr.severity-high {
    background: rgba(147, 0, 10, 0.2) !important;
}

tr.severity-medium {
    background: rgba(92, 72, 19, 0.2) !important;
}

tr.speeding {
    background: rgba(147, 0, 10, 0.2) !important;
}

/* Buttons - Material Filled Button */
button {
    padding: 10px 24px;
    background: var(--md-error);
    color: var(--md-on-primary);
    border: none;
    border-radius: var(--md-radius-xl);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--md-font);
    transition: all 0.2s ease;
    width: auto;
    height: auto;
}

button:hover {
    box-shadow: var(--md-elevation-1);
}

.add-btn {
    background: var(--md-primary);
    margin-bottom: 16px;
}

.add-btn:hover {
    box-shadow: var(--md-elevation-2);
}

/* Links */
a {
    color: var(--md-primary);
    text-decoration: none;
    background: none;
    border-radius: 0;
    font-weight: 500;
}

a:hover {
    text-decoration: underline;
}

/* Form inputs in vehicle form */
#vehicleForm {
    display: none;
    margin: 16px 0;
    padding: 24px;
    background: var(--md-surface-container);
    border-radius: var(--md-radius-lg);
}

#vehicleForm input {
    padding: 12px 16px;
    margin: 8px;
    border: 1px solid var(--md-outline-variant);
    background: var(--md-surface);
    color: var(--md-on-surface);
    border-radius: var(--md-radius-sm);
    width: 200px;
    font-family: var(--md-font);
}

#vehicleForm button {
    margin: 8px;
}

#vehicleForm button:first-of-type {
    background: var(--md-primary);
}

/* Checkbox styling */
label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    cursor: pointer;
    color: var(--md-on-surface);
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--md-primary);
}

/* Legacy support */
.container {
    display: flex;
    align-items: center;
    margin-top: 1em;
    justify-content: center;
    flex-direction: column;
    place-items: flex-start;
}

.form {
    display: flex;
    flex-direction: column;
    min-width: 80vw;
}

.row {
    display: flex;
    align-items: flex-start;
    justify-self: center;
}

.delete-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-top: 1em;
    gap: 1em;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard-container {
        padding: 16px;
    }

    .tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
        text-align: center;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .filters select,
    .filters input,
    .filter-btn {
        width: 100%;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 12px 8px;
    }
    
    .dashboard-header h1 {
        font-size: 1.5rem;
    }

    .test-data-link {
        position: static;
        display: inline-block;
        margin-top: 16px;
    }
}

@media only screen and (min-width: 932px) {
    .container {
        flex-direction: row;
        place-items: center;
    }
}

@media only screen and (min-width: 768px) {
    .col-1 { width: 8.33%; }
    .col-2 { width: 16.66%; }
    .col-3 { width: 25%; }
    .col-4 { width: 33.33%; }
    .col-5 { width: 41.66%; }
    .col-6 { width: 50%; }
    .col-7 { width: 58.33%; }
    .col-8 { width: 66.66%; }
    .col-9 { width: 75%; }
    .col-10 { width: 83.33%; }
    .col-11 { width: 91.66%; }
    .col-12 { width: 100%; }
    body { max-width: 100%; }
    .row { place-self: center; }
}