.mastering-form {
    max-width: 800px;
    margin: 0 auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.section-title {
    font-size: 24px;
    margin-bottom: 20px;
    font-weight: 600;
}

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

.option-box {
    border: 1px solid #F0F0F0;
    padding: 20px;
    border-radius: 8px;
    cursor: pointer;
    position: relative;
    background: white;
    transition: border-color 0.3s ease;
}

.option-box:hover {
    border-color: #000;
}

.option-box input[type="radio"] {
    position: absolute;
    top: 20px;
    right: 20px;
    margin: 0;
}

.option-box.active {
    border-color: #000;
}

.option-title {
    font-weight: 600;
    font-size: 18px;
    margin-bottom: 8px;
}

.option-description {
    color: #666;
    margin-bottom: 12px;
    line-height: 1.5;
}

.discount-label {
    display: inline-block;
    background: #E4FE5D;
    padding: 4px 12px;
    border-radius: 4px;
    font-weight: 500;
    font-size: 14px;
}

.file-upload-section {
    margin-bottom: 30px;
}

.file-url-input {
    width: 100%;
    padding: 12px;
    border: 1px solid #F0F0F0;
    border-radius: 8px;
    margin-bottom: 8px;
}

.file-upload-button {
    background: #000;
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.file-upload-button:hover {
    opacity: 0.9;
}

.file-upload-button input[type="file"] {
    display: none;
}

.file-types {
    display: block;
    margin-top: 8px;
    color: #666;
    font-size: 14px;
}

.mastering-info {
    background: #F9F9F9;
    padding: 20px;
    border-radius: 8px;
    margin: 30px 0;
}

.mastering-info h3 {
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 18px;
    font-weight: 600;
}

.mastering-info ul {
    margin: 0;
    padding-left: 20px;
}

.mastering-info li {
    margin-bottom: 10px;
    line-height: 1.5;
    color: #444;
}

.reference-track {
    margin: 30px 0;
}

.reference-track-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.reference-track-optional {
    color: #666;
    font-size: 14px;
}

.reference-track-input {
    width: 100%;
    padding: 12px;
    border: 1px solid #F0F0F0;
    border-radius: 8px;
    margin-bottom: 8px;
}

.reference-description {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
}

.order-summary {
    margin-top: 40px;
    border-top: 1px solid #F0F0F0;
    padding-top: 30px;
}

.price-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #F0F0F0;
    font-size: 16px;
}

.price-row.total {
    border-bottom: none;
    font-weight: 600;
    font-size: 18px;
    margin-top: 10px;
}

.add-to-cart-btn {
    background: #000;
    color: white;
    padding: 14px 28px;
    border-radius: 25px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    margin-top: 20px;
    transition: opacity 0.3s ease;
}

.add-to-cart-btn:hover {
    opacity: 0.9;
}