.modification-section {
    padding: 10px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

.modification-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.form-wrapper {
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    overflow: hidden;
    margin-top: 40px;
}

.form-grid {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 0;
    align-items: start;
}

.product-summary {
    background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
    padding: 40px 30px;
    color: #fff;
    height: 100%;
    min-height: 100%;
}

.summary-image {
    width: 100%;
    height: 220px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 25px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.summary-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.summary-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #fff;
    line-height: 1.3;
}

.summary-price {
    font-size: 1.8rem;
    font-weight: 600;
    color: #b8926a;
    margin-bottom: 25px;
    font-family: 'Garamond', serif;
}

.summary-features {
    background: rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.summary-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 14px;
    color: rgba(255,255,255,0.9);
}

.summary-feature:last-child {
    margin-bottom: 0;
}

.summary-feature i {
    color: #b8926a;
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.summary-note {
    background: rgba(184,146,106,0.15);
    border-left: 3px solid #b8926a;
    padding: 15px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.6;
    color: rgba(255,255,255,0.85);
    margin-top: 25px;
}

.summary-note strong {
    color: #b8926a;
    display: block;
    margin-bottom: 8px;
}

.form-content {
    padding: 50px 45px;
}

.form-header {
    margin-bottom: 35px;
}

.form-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #2d2d2d;
    margin-bottom: 10px;
}

.form-header p {
    color: #666;
    font-size: 15px;
}

.alert {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 25px;
    font-size: 15px;
    font-weight: 500;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-group label .required {
    color: #dc3545;
    margin-left: 3px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #fafafa;
}

.form-control:focus {
    outline: none;
    border-color: #b8926a;
    background: #fff;
    box-shadow: 0 0 0 4px rgba(184,146,106,0.1);
}

.form-control.error {
    border-color: #dc3545;
    background: #fff5f5;
}

.form-control.success {
    border-color: #28a745;
    background: #f0fff4;
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='%23666' viewBox='0 0 16 16'%3E%3Cpath d='M1.5 5.5l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px;
    padding-right: 40px;
}

.error-message {
    display: none;
    color: #dc3545;
    font-size: 13px;
    margin-top: 6px;
    font-weight: 500;
}

.error-message.show {
    display: block;
}

.file-upload-wrapper {
    position: relative;
}

.file-upload-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #f0f0f0, #e8e8e8);
    border: 2px dashed #ccc;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    color: #666;
}

.file-upload-label:hover {
    background: linear-gradient(135deg, #e8e8e8, #e0e0e0);
    border-color: #b8926a;
    color: #b8926a;
}

.file-upload-label i {
    font-size: 18px;
}

input[type=\"file\"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.file-name {
    display: inline-block;
    margin-left: 10px;
    color: #666;
    font-size: 13px;
}

.checkbox-group {
    margin-bottom: 25px;
}

.checkbox-group > label {
    display: block;
    font-weight: 600;
    color: #333;
    margin-bottom: 12px;
    font-size: 14px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    padding: 12px 16px;
    background: #fafafa;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.form-check:hover {
    background: #f5f5f5;
}

.form-check-input {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #b8926a;
}

.form-check-label {
    cursor: pointer;
    font-size: 14px;
    color: #555;
    margin: 0;
    font-weight: 500;
}

.submit-btn {
    width: 100%;
    padding: 16px 32px;
    background: linear-gradient(135deg, #b8926a, #a07a55);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(184,146,106,0.3);
    margin-top: 10px;
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(184,146,106,0.4);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.submit-btn i {
    margin-right: 8px;
}

.important-note {
    background: linear-gradient(135deg, #fff8f0, #fef5e7);
    border-left: 4px solid #b8926a;
    padding: 20px;
    border-radius: 12px;
    margin-top: 30px;
    font-size: 13px;
    line-height: 1.7;
    color: #555;
}

.important-note strong {
    display: block;
    color: #b8926a;
    font-size: 14px;
    margin-bottom: 8px;
}

@media (max-width: 992px) {
    .form-grid {
        grid-template-columns: 1fr;
    }

    .product-summary {
        padding: 30px 25px;
    }

    .form-content {
        padding: 35px 30px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .modification-section {
        padding: 30px 0;
    }

    .modification-container {
        padding: 0 15px;
    }

    .form-wrapper {
        border-radius: 16px;
    }

    .product-summary {
        padding: 25px 20px;
    }

    .summary-image {
        height: 180px;
    }

    .summary-title {
        font-size: 1.3rem;
    }

    .summary-price {
        font-size: 1.5rem;
    }

    .form-content {
        padding: 25px 20px;
    }

    .form-header h2 {
        font-size: 1.6rem;
    }

    .form-row {
        gap: 20px;
    }
}