:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #ca8a04;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border);
}

header h1 {
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 8px;
}

#subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

#modeIndicator {
    display: inline-block;
    margin-top: 10px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

.demo-mode {
    background: #fef3c7;
    color: var(--warning);
}

#modeIndicator:not(.demo-mode) {
    background: #dcfce7;
    color: var(--success);
}

.controls {
    background: var(--card);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: end;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.control-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

select, button {
    padding: 10px 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

select {
    background: white;
    min-width: 160px;
}

button {
    background: var(--primary);
    color: white;
    border: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}

button:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.btn-location {
    background: #7c3aed;
}

.btn-location:hover {
    background: #6d28d9;
}

.location-controls {
    margin-left: auto;
    flex-direction: row;
    gap: 10px;
}

.status-bar {
    background: #dbeafe;
    color: var(--primary-dark);
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

#lastUpdate {
    text-align: right;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 15px;
}

.station-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.station-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.station-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.station-info h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    color: var(--text);
}

.station-info .address {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.station-meta {
    display: flex;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.station-price {
    text-align: right;
}

.price-tag {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--success);
    display: block;
    margin-bottom: 4px;
}

.price-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.best-price .price-tag {
    color: var(--danger);
    text-shadow: 0 0 8px rgba(220, 38, 38, 0.2);
}

.best-price {
    border-left: 4px solid var(--danger);
    background: linear-gradient(to right, #fef2f2, white);
}

.distance-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: #f1f5f9;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
}

.loading, .error {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.error {
    background: #fef2f2;
    color: var(--danger);
    border-radius: 8px;
    border: 1px solid #fecaca;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

@media (max-width: 640px) {
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .location-controls {
        margin-left: 0;
        flex-direction: column;
    }
    
    .station-card {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .station-meta {
        justify-content: center;
    }
}