:root {
    --card-bg: #2d2d2d;
    --border-color: #444;
    --accent-color: #00ff9d; /* Added for consistency */
    --text-color: #fff; /* Default text color for dark theme */
    --background-color: #1a1a1a; /* Background color for dark theme */
}

[data-theme="light"] {
    --card-bg: #f5f5f5;
    --border-color: #ccc;
    --text-color: #333;
    --background-color: #fff;
}

.builder-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    background-color: var(--background-color);
    color: var(--text-color);
}

.build-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
}

.step {
    width: 18%;
    padding: 15px;
    text-align: center;
    background: #2d2d2d;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    opacity: 0.3;
    transition: all 0.3s ease;
    cursor: pointer; /* Make steps clickable */
}

.step.active {
    opacity: 1;
    transform: scale(1.05);
    border: 2px solid var(--accent-color);
}

.component-category {
    display: none;
    animation: slideIn 0.5s ease-out;
}

.component-category.active {
    display: block;
}

.component-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.component-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.component-card:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.component-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 255, 157, 0.1);
}

.component-card.selected {
    border: 2px solid var(--accent-color);
    background: var(--background-color);
    color: var(--accent-color);
}

.component-image {
    width: 100%;
    height: 200px;
    object-fit: contain;
    margin-bottom: 15px;
}

.navigation-buttons {
    margin-top: 30px;
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.summary-container {
    display: none;
    animation: fadeIn 0.5s ease-out;
}

#build-summary {
    margin-top: 20px;
}

.summary-component {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.summary-image {
    width: 100px;
    height: 100px;
    object-fit: contain;
    margin-right: 20px;
    contain: lazy; /* Added for performance */
}

.summary-details {
    flex: 1;
    margin-left: 20px;
}

.summary-details h3 {
    margin: 0 0 5px;
    font-size: 1.2em;
}

.summary-details p {
    margin: 0 0 5px;
    color: #ccc;
}

.summary-actions {
    margin-top: 30px;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.button {
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    background-color: #3d3d3d;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.button:hover {
    background-color: #4d4d4d;
}

.button:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.checkout-btn {
    background-color: var(--accent-color);
    color: #1a1a1a;
}

.checkout-btn:hover {
    background-color: #00e68a;
}

.btn-secondary {
    background-color: #3d3d3d;
    border: 1px solid var(--accent-color);
}

.btn-secondary:hover {
    background-color: #4d4d4d;
}

.prev-btn,
.next-btn {
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    background-color: #3d3d3d;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.prev-btn:hover,
.next-btn:hover {
    background-color: #4d4d4d;
}

.prev-btn:focus,
.next-btn:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.prev-btn:disabled,
.next-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#compatibility-messages {
    margin: 20px 0;
    padding: 15px;
    background: rgba(255, 85, 85, 0.15);
    border: 1px solid #ff5555;
    border-radius: 8px;
    color: #ff5555;
    font-weight: bold;
}

.compatibility-message.warning {
    margin-bottom: 8px;
}

.price-tag {
    color: var(--accent-color);
    font-weight: bold;
    margin-top: 10px;
}

.total-price {
    font-size: 1.5em;
    text-align: right;
    margin-top: 30px;
}

.quantity-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 10px;
    padding: 5px;
    background: rgba(0, 255, 157, 0.1);
    border-radius: 4px;
}

.qty-btn {
    background: #3d3d3d;
    color: var(--text-color);
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    font-size: 1.2em;
}

.qty-btn:hover {
    background: #4d4d4d;
}

.qty-value {
    font-weight: bold;
    min-width: 20px;
    text-align: center;
}

/* Smaller Screen Optimizations */
@media (max-width: 768px) {
    .builder-container {
        padding: 20px 10px;
    }

    .component-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* Reduced min width */
    }

    .component-image {
        height: 150px; /* Reduced height for mobile */
    }

    .summary-image {
        width: 80px;
        height: 80px;
    }

    .summary-details h3 {
        font-size: 1em;
    }

    .summary-details p {
        font-size: 0.9em;
    }

    .summary-actions {
        flex-direction: column;
    }

    .summary-actions .button {
        width: 100%;
    }

    .total-price {
        font-size: 1.2em;
    }

    .navigation-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .prev-btn,
    .next-btn {
        width: 100%;
    }
}

@media (max-width: 600px) {
    .build-steps {
        flex-direction: column;
    }

    .step {
        width: 100%;
        margin-bottom: 10px;
        padding: 12px; /* Adjusted padding for touch targets */
    }

    .component-grid {
        grid-template-columns: 1fr; /* Single column for very small screens */
    }

    .component-image {
        height: 120px; /* Further reduced for very small screens */
    }

    .summary-image {
        width: 60px;
        height: 60px;
    }

    .summary-details h3 {
        font-size: 0.9em;
    }

    .summary-details p {
        font-size: 0.8em;
    }

    .total-price {
        font-size: 1em;
    }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}