.selector-container {
    background: #1a1a1a;
    padding: 40px;
    border-radius: 15px;
    max-width: 1000px;
    margin: 50px auto;
    border: 1px solid #333;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    color: white;
}

.selector-title {
    text-align: center;
    margin-bottom: 30px;
}

.selector-title h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.selector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.selector-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.selector-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: #888;
}

.selector-group select {
    background: #2a2a2a;
    border: 1px solid #444;
    color: white;
    padding: 12px;
    border-radius: 8px;
    outline: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.selector-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(230, 0, 0, 0.2);
}

.selector-group select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.results-container {
    margin-top: 40px;
    display: none;
    /* Hidden by default */
}

.engine-info {
    background: #222;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 25px;
    border-left: 4px solid var(--primary);
}

.engine-info h3 {
    margin-bottom: 10px;
    font-size: 1.4rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-box {
    background: #2a2a2a;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.stat-label {
    font-size: 0.8rem;
    color: #888;
    text-transform: uppercase;
    display: block;
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stages-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.stage-result-card {
    background: #222;
    border: 1px solid #333;
    padding: 25px;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.stage-result-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.stage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.stage-badge {
    background: #444;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

.badge-stage-1 {
    background: var(--primary);
}

.badge-stage-2 {
    background: #d35400;
    /* Orange-ish for Stage 2 */
}

.badge-conversion-e85,
.badge-e85-+-stage-1 {
    background: #27ae60;
    /* Green for Ethanol */
}

.stage-price {
    font-size: 1.2rem;
    font-weight: 700;
}

.compare-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.compare-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 10px;
    border-bottom: 1px solid #333;
}

.compare-label {
    font-weight: 600;
}

.compare-values {
    display: flex;
    align-items: center;
    gap: 10px;
}

.old-value {
    color: #666;
    text-decoration: line-through;
    font-size: 0.9rem;
}

.new-value {
    color: #27ae60;
    font-weight: 700;
    font-size: 1.1rem;
}

.gain-value {
    color: #27ae60;
    font-size: 0.8rem;
    background: rgba(39, 174, 96, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .selector-container {
        padding: 20px;
        margin: 20px 10px;
    }

    .selector-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stages-results {
        grid-template-columns: 1fr;
    }

    .selector-title h2 {
        font-size: 1.5rem;
    }
}