:root {
    --bg: #0B0B0D;
    --bg-elevated: #111113;
    --surface: #1A1A1C;
    --text-primary: #FFFFFF;
    --text-secondary: #A5A5A6;
    --accent: #3C6DF0;
    --accent-soft: #2A3E6B;
    --border: #2C2C2E;
    --danger: #E53935;
    --success: #4CAF50;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg);
    min-height: 100vh;
    color: var(--text-primary);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

h1, h2 {
    color: var(--text-primary);
    text-align: center;
}

p {
    color: var(--text-secondary);
    line-height: 1.6;
    text-align: center;
}

.hidden {
    display: none !important;
}

/* Login Section */
#login-section {
    background: var(--bg-elevated);
    border-radius: 16px;
    padding: 3rem;
    width: 800px;
    margin: 2rem auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.login-description {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

/* QR Code Container */
.qr-container {
    text-align: center;
}

.qr-code-wrapper {
    margin-bottom: 1.5rem;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--accent);
}

.qr-loading i {
    font-size: 3rem;
}

.qr-image-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.qr-image-container img {
    width: 450px;
    height: 450px;
    border: 4px solid var(--accent);
    border-radius: 12px;
    padding: 1rem;
    background: var(--text-primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.qr-instructions {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.qr-instructions i {
    margin-right: 0.5rem;
    color: var(--accent);
}

.qr-status {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--surface);
    border-radius: 8px;
    border: 1px solid var(--border);
    color: var(--accent);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.login-form h2 {
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--surface);
    color: var(--text-primary);
    transition: border-color 0.3s;
}

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

.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--accent);
    color: var(--text-primary);
    width: 100%;
    justify-content: center;
}

/* Larger generate button when visible and enabled */
#generate-qr-btn:not(.hidden):not(:disabled) {
    padding: 1.25rem 3rem;
    font-size: 1.25rem;
    min-height: 60px;
}

.btn-primary:hover {
    background: var(--accent-soft);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(60, 109, 240, 0.3);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    background: var(--surface);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--accent);
}

.error-message {
    margin-top: 1rem;
    padding: 0.75rem;
    background: rgba(229, 57, 53, 0.1);
    color: var(--danger);
    border-radius: 8px;
    border: 1px solid var(--danger);
}

/* Dashboard Section */
#dashboard-section {
    background: var(--bg);
}

.dashboard-header {
    background: var(--bg-elevated);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
}

.dashboard-header h1 {
    margin: 0;
    color: var(--text-primary);
    text-align: left;
}

.dashboard-header .btn {
    margin-left: 0.5rem;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.dashboard-card {
    background: var(--bg-elevated);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.7);
    border-color: var(--accent-soft);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border);
}

.card-header i {
    font-size: 1.5rem;
    color: var(--accent);
}

.card-header h2 {
    margin: 0;
    font-size: 1.25rem;
    text-align: left;
    color: var(--text-primary);
}

.card-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Metrics */
.metric-large {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.metric-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.metric-unit {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.metric-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.metric-row:last-child {
    border-bottom: none;
}

.metric-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.metric-value-small {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

/* Battery Bar */
.battery-bar {
    width: 100%;
    height: 20px;
    background: var(--surface);
    border-radius: 10px;
    overflow: hidden;
    margin: 1rem 0;
    border: 1px solid var(--border);
}

.battery-bar-fill {
    height: 100%;
    background: var(--success);
    transition: width 0.5s, background-color 0.5s;
    border-radius: 10px;
}

/* Speed Card Special Styling */
.speed-card .metric-value {
    color: var(--accent);
}

/* Battery Card Special Styling */
.battery-card .card-header i {
    color: var(--success);
}

/* Climate Card Special Styling */
.climate-card .card-header i {
    color: var(--accent);
}

.climate-card .metric-value {
    color: var(--accent);
}

/* Status Card Special Styling */
.status-card .card-header i {
    color: var(--accent);
}

/* Doors Card Special Styling */
.doors-card .card-header i {
    color: var(--accent);
}

/* Info Card Special Styling */
.info-card .card-header i {
    color: var(--text-secondary);
}

/* Loading Indicator */
.loading {
    text-align: center;
    padding: 2rem;
    background: var(--bg-elevated);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
}

.loading i {
    font-size: 2rem;
    color: var(--accent);
    margin-right: 1rem;
}

/* Regular Content */
#regular-content {
    background-color: var(--bg-elevated);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
    max-width: 600px;
    margin: 2rem auto;
}

#regular-content h1 {
    color: var(--danger);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .dashboard-header h1 {
        text-align: center;
    }
    
    .dashboard-header .btn {
        width: 100%;
        margin-left: 0;
        margin-top: 0.5rem;
    }
    
    .metric-value {
        font-size: 2rem;
    }
    
    #login-section {
        padding: 2rem 1.5rem;
    }
}

/* Location Map */
.location-map {
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--border);
    min-height: 200px;
    position: relative;
}

.map-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-secondary);
}

.map-placeholder i {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.map-placeholder p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

#map-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

/* Command Section */
.command-section {
    background: var(--bg-elevated);
    border-radius: 16px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
}

.command-section h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    text-align: left;
}

.command-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.cmd-btn {
    padding: 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    min-height: 80px;
}

.cmd-btn:hover:not(:disabled) {
    border-color: var(--accent);
    background: var(--bg-elevated);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(60, 109, 240, 0.3);
}

.cmd-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--surface);
}

.cmd-btn i {
    font-size: 1.5rem;
    color: var(--accent);
}

.command-status {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    margin-top: 1rem;
}

.command-status.success {
    background: rgba(76, 175, 80, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.command-status.error {
    background: rgba(229, 57, 53, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

/* Status indicators */
.metric-value-small[data-status="open"],
.metric-value-small[data-status="yes"] {
    color: var(--danger);
}

.metric-value-small[data-status="closed"],
.metric-value-small[data-status="no"] {
    color: var(--success);
}

@media (max-width: 768px) {
    .command-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}