.premium-checkout {
    padding: 80px 0 60px;
    background: linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);
    min-height: 100vh;
}

.premium-checkout__container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.premium-checkout__header {
    margin-bottom: 48px;
}

.premium-checkout__title {
    font-size: 42px;
    font-weight: 800;
    color: #1E293B;
    margin: 0 0 16px;
}

.premium-checkout__breadcrumb {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.premium-checkout__breadcrumb-link {
    color: #64748B;
    text-decoration: none;
    transition: color 0.2s;
}

.premium-checkout__breadcrumb-link:hover {
    color: #5B4CF0;
}

.premium-checkout__breadcrumb-separator {
    width: 16px;
    height: 16px;
    color: #CBD5E1;
}

.premium-checkout__breadcrumb-current {
    color: #1E293B;
    font-weight: 600;
}

.premium-checkout__grid {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 32px;
}

.premium-checkout__card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #E2E8F0;
}

.premium-checkout__card-title {
    font-size: 24px;
    font-weight: 700;
    color: #1E293B;
    margin: 0 0 32px;
}

.premium-checkout__info-box {
    background: linear-gradient(135deg, #5B4CF0 0%, #7C6BF5 100%);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 32px;
}

.premium-checkout__info-box-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.premium-checkout__info-box-text {
    color: white;
    font-size: 14px;
}

.premium-checkout__info-box-link {
    color: white;
    text-decoration: none;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 8px;
    transition: background 0.2s;
}

.premium-checkout__info-box-link:hover {
    background: rgba(255, 255, 255, 0.3);
}

.premium-checkout__form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.premium-checkout__form-group {
    margin-bottom: 24px;
}

.premium-checkout__label {
    display: block;
    font-weight: 600;
    color: #1E293B;
    margin-bottom: 8px;
    font-size: 15px;
}

.premium-checkout__input,
.premium-checkout__select,
.premium-checkout__textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #E2E8F0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.2s;
    box-sizing: border-box;
    font-family: inherit;
}

.premium-checkout__input:focus,
.premium-checkout__select:focus,
.premium-checkout__textarea:focus {
    outline: none;
    border-color: #5B4CF0;
    box-shadow: 0 0 0 3px rgba(91, 76, 240, 0.1);
}

.premium-checkout__trust-message {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #64748B;
    margin-top: 8px;
}

.premium-checkout__trust-icon {
    width: 16px;
    height: 16px;
    color: #10B981;
}

.premium-checkout__helper-text {
    font-size: 13px;
    color: #64748B;
    margin-top: 6px;
}

.premium-checkout__toggle-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.premium-checkout__toggle-checkbox {
    display: none;
}

.premium-checkout__toggle-switch {
    width: 48px;
    height: 26px;
    background: #E2E8F0;
    border-radius: 13px;
    position: relative;
    transition: background 0.3s;
}

.premium-checkout__toggle-switch::after {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.3s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.premium-checkout__toggle-checkbox:checked + .premium-checkout__toggle-switch {
    background: #5B4CF0;
}

.premium-checkout__toggle-checkbox:checked + .premium-checkout__toggle-switch::after {
    transform: translateX(22px);
}

.premium-checkout__toggle-text {
    font-size: 15px;
    color: #1E293B;
}

.premium-checkout__password-field {
    display: none;
}

.premium-checkout__password-field--visible {
    display: block;
}

.premium-checkout__coupon,
.premium-checkout__notes {
    margin-top: 24px;
}

.premium-checkout__coupon-toggle,
.premium-checkout__notes-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 12px 16px;
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 10px;
    font-size: 14px;
    color: #1E293B;
    cursor: pointer;
    transition: all 0.2s;
}

.premium-checkout__coupon-toggle:hover,
.premium-checkout__notes-toggle:hover {
    background: #F1F5F9;
}

.premium-checkout__coupon-icon,
.premium-checkout__notes-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s;
}

.premium-checkout__coupon-icon--active,
.premium-checkout__notes-icon--active {
    transform: rotate(180deg);
}

.premium-checkout__coupon-content,
.premium-checkout__notes-content {
    display: none;
    margin-top: 16px;
}

.premium-checkout__coupon-content--active,
.premium-checkout__notes-content--active {
    display: block;
}

.premium-checkout__coupon-apply {
    padding: 10px 20px;
    background: #5B4CF0;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.premium-checkout__coupon-apply:hover {
    background: #4F46E5;
}

.premium-checkout__summary {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.premium-checkout__summary-card {
    background: white;
    border-radius: 20px;
    padding: 32px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #E2E8F0;
}

.premium-checkout__summary-card--sticky {
    position: sticky;
    top: 100px;
}

.premium-checkout__product {
    display: flex;
    gap: 16px;
    padding-bottom: 24px;
    margin-bottom: 24px;
    border-bottom: 1px solid #E2E8F0;
}

.premium-checkout__product-image {
    width: 100px;
    height: 75px;
    flex-shrink: 0;
    border-radius: 10px;
    background: #F8FAFC;
    object-fit: cover;
}

.premium-checkout__product-info {
    flex: 1;
}

.premium-checkout__product-category {
    font-size: 12px;
    color: #64748B;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    font-weight: 600;
}

.premium-checkout__product-title {
    font-size: 16px;
    font-weight: 700;
    color: #1E293B;
    margin: 0 0 8px;
}

.premium-checkout__product-meta {
    display: flex;
    gap: 12px;
    margin-bottom: 8px;
}

.premium-checkout__product-version {
    font-size: 12px;
    color: #64748B;
}

.premium-checkout__product-price {
    font-size: 20px;
    font-weight: 800;
    color: #5B4CF0;
}

.premium-checkout__totals {
    margin-bottom: 24px;
}

.premium-checkout__total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.premium-checkout__total-label {
    font-size: 15px;
    color: #64748B;
}

.premium-checkout__total-value {
    font-size: 16px;
    font-weight: 600;
    color: #1E293B;
}

.premium-checkout__total-value--discount {
    color: #10B981;
}

.premium-checkout__divider {
    height: 1px;
    background: #E2E8F0;
    margin: 20px 0;
}

.premium-checkout__total-row--grand {
    margin-bottom: 24px;
}

.premium-checkout__total-label--grand {
    font-size: 18px;
    font-weight: 700;
    color: #1E293B;
}

.premium-checkout__total-value--grand {
    font-size: 28px;
    font-weight: 800;
    color: #5B4CF0;
}

.premium-checkout__payment {
    margin-bottom: 24px;
}

.premium-checkout__payment-title {
    font-size: 16px;
    font-weight: 700;
    color: #1E293B;
    margin: 0 0 16px;
}

.premium-checkout__payment-methods {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.premium-checkout__payment-method {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 2px solid #E2E8F0;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.premium-checkout__payment-method:hover {
    border-color: #5B4CF0;
}

.premium-checkout__payment-method input[type="radio"] {
    display: none;
}

.premium-checkout__payment-method input[type="radio"]:checked + .premium-checkout__payment-radio {
    background: #5B4CF0;
    border-color: #5B4CF0;
}

.premium-checkout__payment-radio {
    width: 20px;
    height: 20px;
    border: 2px solid #CBD5E1;
    border-radius: 50%;
    transition: all 0.2s;
}

.premium-checkout__payment-icon {
    font-size: 24px;
}

.premium-checkout__payment-name {
    font-size: 15px;
    font-weight: 600;
    color: #1E293B;
}

.premium-checkout__usdt {
    margin-top: 24px;
    padding: 20px;
    background: #F8FAFC;
    border-radius: 12px;
    border: 1px solid #E2E8F0;
}

.premium-checkout__usdt-title {
    font-size: 14px;
    font-weight: 600;
    color: #1E293B;
    margin: 0 0 16px;
}

.premium-checkout__usdt-network {
    margin-bottom: 20px;
}

.premium-checkout__usdt-network-label {
    font-size: 13px;
    font-weight: 600;
    color: #475569;
    margin-bottom: 8px;
    display: block;
}

.premium-checkout__usdt-network-options {
    display: flex;
    gap: 12px;
}

.premium-checkout__usdt-network-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: white;
    border: 2px solid #E2E8F0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.premium-checkout__usdt-network-option:hover {
    border-color: #5B4CF0;
}

.premium-checkout__usdt-network-option input[type="radio"] {
    display: none;
}

.premium-checkout__usdt-network-option input[type="radio"]:checked + .premium-checkout__usdt-network-radio {
    background: #5B4CF0;
    border-color: #5B4CF0;
}

.premium-checkout__usdt-network-radio {
    width: 18px;
    height: 18px;
    border: 2px solid #CBD5E1;
    border-radius: 50%;
    transition: all 0.2s;
}

.premium-checkout__usdt-network-name {
    font-size: 14px;
    font-weight: 500;
    color: #1E293B;
}

.premium-checkout__usdt-wallet {
    margin-bottom: 20px;
}

.premium-checkout__usdt-wallet-label {
    font-size: 13px;
    font-weight: 600;
    color: #475569;
    margin-bottom: 8px;
    display: block;
}

.premium-checkout__usdt-wallet-container {
    display: flex;
    gap: 8px;
}

.premium-checkout__usdt-wallet-input {
    flex: 1;
    padding: 10px 12px;
    background: white;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
    font-size: 13px;
    font-family: 'Courier New', monospace;
    color: #475569;
}

.premium-checkout__usdt-copy-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    background: #5B4CF0;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.premium-checkout__usdt-copy-btn:hover {
    background: #4338CA;
}

.premium-checkout__usdt-copy-btn svg {
    width: 16px;
    height: 16px;
}

.premium-checkout__usdt-qr {
    margin-bottom: 20px;
}

.premium-checkout__usdt-qr-label {
    font-size: 13px;
    font-weight: 600;
    color: #475569;
    margin-bottom: 8px;
    display: block;
}

.premium-checkout__usdt-qr-container {
    display: flex;
    justify-content: center;
    padding: 16px;
    background: white;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
}

.premium-checkout__usdt-qr-placeholder {
    width: 150px;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.premium-checkout__usdt-qr-placeholder svg {
    width: 100%;
    height: 100%;
}

.premium-checkout__usdt-txid {
    margin-bottom: 0;
}

.premium-checkout__usdt-txid-label {
    font-size: 13px;
    font-weight: 600;
    color: #475569;
    margin-bottom: 8px;
    display: block;
}

.premium-checkout__usdt-txid-input {
    width: 100%;
    padding: 10px 12px;
    background: white;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
    font-size: 13px;
    font-family: 'Courier New', monospace;
    color: #1E293B;
}

.premium-checkout__usdt-txid-input:focus {
    outline: none;
    border-color: #5B4CF0;
}

.premium-checkout__usdt-txid-hint {
    font-size: 12px;
    color: #64748B;
    margin-top: 6px;
    margin-bottom: 0;
}

.premium-checkout__currency {
    margin-bottom: 24px;
    padding: 20px;
    background: #F8FAFC;
    border-radius: 12px;
    border: 1px solid #E2E8F0;
}

.premium-checkout__currency-title {
    font-size: 14px;
    font-weight: 600;
    color: #1E293B;
    margin: 0 0 16px;
}

.premium-checkout__currency-options {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

@media (max-width: 1024px) {
    .premium-checkout__currency-options {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .premium-checkout__currency-options {
        grid-template-columns: 1fr;
    }
}

.premium-checkout__currency-option {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 12px;
    background: white;
    border: 2px solid #E2E8F0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.premium-checkout__currency-option:hover {
    border-color: #5B4CF0;
}

.premium-checkout__currency-option input[type="radio"] {
    display: none;
}

.premium-checkout__currency-option input[type="radio"]:checked + .premium-checkout__currency-radio {
    background: #5B4CF0;
    border-color: #5B4CF0;
}

.premium-checkout__currency-radio {
    width: 18px;
    height: 18px;
    border: 2px solid #CBD5E1;
    border-radius: 50%;
    transition: all 0.2s;
}

.premium-checkout__currency-symbol {
    font-size: 18px;
    font-weight: 700;
    color: #1E293B;
}

.premium-checkout__currency-name {
    font-size: 14px;
    font-weight: 600;
    color: #1E293B;
}

.premium-checkout__security {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.premium-checkout__security-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: #64748B;
}

.premium-checkout__security-icon {
    width: 16px;
    height: 16px;
    color: #10B981;
}

.premium-checkout__submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 18px 32px;
    background: linear-gradient(135deg, #5B4CF0 0%, #7C6BF5 100%);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(91, 76, 240, 0.4);
}

.premium-checkout__submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(91, 76, 240, 0.5);
}

.premium-checkout__submit-icon {
    width: 20px;
    height: 20px;
}

.premium-checkout__submit--loading {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 1024px) {
    .premium-checkout__grid {
        grid-template-columns: 1fr 380px;
    }
}

@media (max-width: 768px) {
    .premium-checkout__grid {
        grid-template-columns: 1fr;
    }
    
    .premium-checkout__summary {
        position: static;
        order: -1;
    }
    
    .premium-checkout__form-row {
        grid-template-columns: 1fr;
    }
    
    .premium-checkout__security {
        grid-template-columns: 1fr;
    }
}