:root {
    --cart-primary: var(--primary-color);
    --cart-primary-dark: var(--primary-dark);
    --cart-primary-light: var(--primary-light);
    --cart-success: var(--success-color, #10b981);
    --cart-danger: var(--error-color, #ef4444);
    --cart-warning: var(--warning-color, #f59e0b);
    
    --cart-bg-main: var(--bg-page);
    --cart-bg-secondary: var(--bg-section);
    --cart-bg-card: var(--bg-panel);
    --cart-bg-card-hover: var(--bg-panel-alt);
    --cart-bg-overlay: var(--bg-overlay, rgba(0, 0, 0, 0.5));
    
    --cart-border: var(--border-color);
    --cart-border-light: var(--border-white-light);
    --cart-border-hover: var(--primary-color);
    
    --cart-text-primary: var(--text-primary);
    --cart-text-secondary: var(--text-secondary);
    --cart-text-muted: var(--text-muted);
    
    --cart-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --cart-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --cart-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --cart-shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.3);
    --cart-shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    
    --cart-radius-sm: 8px;
    --cart-radius-md: 12px;
    --cart-radius-lg: 16px;
    --cart-radius-xl: 20px;
    
    --cart-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --cart-blur: blur(20px);
}

.hidden {
    display: none !important;
}

.cart-page-modern {
    width: 100%;
    min-height: calc(100vh - 80px);
    background: var(--bg-page);
    position: relative;
    padding-top: calc(var(--header-height, 60px) + 40px);
    padding-bottom: 80px;
    overflow-x: hidden;
    margin-top: 0;
}

.cart-page-modern::before {
    content: none;
}

.cart-container {
    width: 100%;
    max-width: var(--container-max-width, 1600px);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.cart-page-header {
    margin-bottom: 40px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
}

.header-left {
    flex: 1;
}

.page-title {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 0 0 12px 0;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--cart-text-primary);
    letter-spacing: -0.02em;
}

.title-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--cart-primary), var(--cart-success));
    border-radius: var(--cart-radius-md);
    color: var(--text-white);
    font-size: 1.5rem;
    box-shadow: var(--cart-shadow-glow);
}

.cart-count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 12px;
    background: linear-gradient(135deg, var(--cart-primary), var(--cart-primary-dark));
    color: var(--text-white);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 700;
    box-shadow: var(--cart-shadow-md);
}

.page-subtitle {
    margin: 0;
    color: var(--cart-text-muted);
    font-size: 1rem;
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
}

.btn-clear-cart {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--cart-radius-md);
    color: #fca5a5;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--cart-transition);
}

.btn-clear-cart:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.5);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.3);
}

.cart-loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 40px;
    text-align: center;
}

.loading-spinner {
    margin-bottom: 24px;
}

.spinner {
    width: 64px;
    height: 64px;
    border: 4px solid rgba(0, 212, 255, 0.1);
    border-top-color: var(--cart-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    color: var(--cart-text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

.empty-cart-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 40px;
    text-align: center;
}

.empty-icon-wrapper {
    position: relative;
    width: 200px;
    height: 200px;
    margin-bottom: 40px;
}

.empty-icon {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(16, 185, 129, 0.1));
    border-radius: 50%;
    color: var(--cart-primary);
    font-size: 5rem;
    position: relative;
    z-index: 2;
    border: 2px solid rgba(0, 212, 255, 0.2);
}

.empty-waves {
    position: absolute;
    inset: 0;
    border-radius: 50%;
}

.wave {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid var(--cart-primary);
    opacity: 0;
    animation: wave 2s ease-out infinite;
}

.wave-1 {
    animation-delay: 0s;
}

.wave-2 {
    animation-delay: 0.5s;
}

.wave-3 {
    animation-delay: 1s;
}

@keyframes wave {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.empty-title {
    margin: 0 0 16px 0;
    font-size: 2rem;
    font-weight: 700;
    color: var(--cart-text-primary);
}

.empty-description {
    margin: 0 0 40px 0;
    color: var(--cart-text-muted);
    font-size: 1.125rem;
    max-width: 500px;
}

.empty-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.cart-page-modern .btn-primary-large,
.cart-page-modern .btn-secondary-large {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: var(--cart-radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--cart-transition);
}

.cart-page-modern .btn-primary-large {
    background: linear-gradient(135deg, var(--cart-primary), var(--cart-success));
    color: var(--text-white);
    box-shadow: var(--cart-shadow-lg);
}

.cart-page-modern .btn-primary-large:hover {
    transform: translateY(-3px);
    box-shadow: var(--cart-shadow-xl);
}

.cart-page-modern .btn-secondary-large {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--cart-border-light);
    color: var(--cart-text-secondary);
}

.cart-page-modern .btn-secondary-large:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--cart-border);
    color: var(--cart-text-primary);
}

.cart-content-wrapper {
    display: block;
}

.cart-main-layout {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 32px;
    align-items: start;
}

.cart-items-section {
    background: transparent;
    backdrop-filter: none;
    border: 1px solid var(--cart-border-light);
    border-radius: var(--cart-radius-xl);
    padding: 32px;
    box-shadow: none;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--cart-border-light);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cart-text-primary);
}

.section-title i {
    color: var(--cart-primary);
    font-size: 1.25rem;
}

.items-count-text {
    color: var(--cart-text-muted);
    font-size: 0.875rem;
}

.count-number {
    color: var(--cart-primary);
    font-weight: 700;
}

.cart-items-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cart-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--cart-border-light);
    border-radius: var(--cart-radius-lg);
    transition: var(--cart-transition);
    position: relative;
    overflow: hidden;
}

.cart-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: linear-gradient(135deg, var(--cart-primary), var(--cart-success));
    transition: var(--cart-transition);
}

.cart-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--cart-border-hover);
    transform: translateX(4px);
    box-shadow: var(--cart-shadow-md);
}

.cart-item:hover::before {
    width: 4px;
}

.item-cover {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    border-radius: var(--cart-radius-md);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--cart-border-light);
    position: relative;
}

.item-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--cart-transition);
}

.cart-item:hover .item-cover img {
    transform: scale(1.05);
}

.item-details {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.item-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cart-text-primary);
    margin: 0;
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.item-artist {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--cart-text-secondary);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.item-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.item-duration {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--cart-text-muted);
    font-size: 0.875rem;
}

.item-duration i {
    font-size: 0.75rem;
}

.item-genre {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(16, 185, 129, 0.15));
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    color: var(--cart-primary);
    font-size: 0.8rem;
    font-weight: 600;
}

.item-price {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--cart-primary);
    white-space: nowrap;
    margin-left: auto;
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.item-actions {
    display: flex;
    align-items: center;
}

.remove-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--cart-radius-md);
    color: #fca5a5;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--cart-transition);
}

.remove-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.5);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.cart-summary-section {
    position: sticky;
    top: 100px;
}

.summary-card {
    background: transparent;
    backdrop-filter: none;
    border: 1px solid var(--cart-border-light);
    border-radius: var(--cart-radius-xl);
    padding: 32px;
    box-shadow: none;
    position: relative;
    z-index: 5;
}

.summary-header {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--cart-border-light);
}

.summary-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cart-text-primary);
}

.summary-title i {
    color: var(--cart-primary);
    font-size: 1.25rem;
}

.summary-body {
    margin-bottom: 24px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--cart-border-light);
}

.summary-row:last-child {
    border-bottom: none;
}

.summary-row-total {
    margin-top: 16px;
    padding-top: 24px;
    border-top: 2px solid var(--cart-border);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(16, 185, 129, 0.05));
    border-radius: var(--cart-radius-md);
    padding: 20px;
    margin-left: -20px;
    margin-right: -20px;
}

.summary-label {
    font-size: 1rem;
    font-weight: 500;
    color: var(--cart-text-secondary);
}

.summary-value {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--cart-text-primary);
}

.summary-total {
    font-size: 1.75rem !important;
    font-weight: 800 !important;
    color: var(--cart-primary) !important;
    text-shadow: 0 0 15px rgba(0, 212, 255, 0.4);
}

.summary-footer {
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    z-index: 10;
}

.btn-checkout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 18px 24px;
    background: linear-gradient(135deg, var(--cart-primary), var(--cart-success));
    border: none;
    border-radius: var(--cart-radius-md);
    color: var(--text-white);
    font-size: 1.125rem;
    font-weight: 700;
    text-decoration: none;
    transition: var(--cart-transition);
    box-shadow: var(--cart-shadow-lg);
    position: relative;
    overflow: hidden;
    cursor: pointer !important;
    pointer-events: auto !important;
    z-index: 10 !important;
}

.btn-checkout::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--cart-transition);
    pointer-events: none !important;
    z-index: -1;
}

.btn-checkout:hover::before {
    left: 100%;
}

.btn-checkout:hover {
    transform: translateY(-3px);
    box-shadow: var(--cart-shadow-xl);
}

.btn-checkout * {
    pointer-events: none;
}

.btn-continue {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--cart-border-light);
    border-radius: var(--cart-radius-md);
    color: var(--cart-text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--cart-transition);
}

.btn-continue:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--cart-border);
    color: var(--cart-text-primary);
}

@media (max-width: 1024px) {
    .cart-main-layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .cart-summary-section {
        position: static;
    }
}

@media (max-width: 768px) {
    .cart-container {
        padding: 0 16px;
    }
    
    .cart-page-modern {
        padding: 24px 0 60px;
    }
    
    .header-content {
        flex-direction: column;
        align-items: stretch;
    }
    
    .header-right {
        margin-top: 16px;
    }
    
    .btn-clear-cart {
        width: 100%;
        justify-content: center;
    }
    
    .cart-items-section,
    .summary-card {
        padding: 24px;
    }
    
    .cart-item {
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .item-price {
        margin-left: 0;
        width: 100%;
    }
    
    .item-actions {
        width: 100%;
    }
    
    .remove-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.75rem;
    }
    
    .title-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    
    .cart-items-section,
    .summary-card {
        padding: 20px;
    }
    
    .cart-item {
        padding: 16px;
    }
    
    .item-cover {
        width: 64px;
        height: 64px;
    }
    
    .summary-total {
        font-size: 1.5rem !important;
    }
}