/**
 * Carrinho de Compras Aprimorado - Livro Prático E-commerce
 * Design moderno, intuitivo e acessível
 * 
 * @author Arquiteto de Software
 * @version 2.0 - MODAL REMOVIDO: Agora usa página dedicada
 */

/* ===== VARIÁVEIS CSS ESSENCIAIS PARA O MODAL ===== */
:root {
    --white: #ffffff;
    --primary-color: #1e3a8a;
    --primary-dark: #1e40af;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --success-color: #16a34a;
    --error-color: #dc2626;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    --transition-fast: 0.15s;
    --transition-normal: 0.3s;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* ===== MODAL DO CARRINHO - RESTAURADO ===== */
/* Modal principal */
.cart-modal {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 480px;
    height: 100vh;
    background: var(--white);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    z-index: 10001;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    display: none;
    flex-direction: column;
    overflow: hidden;
}

.cart-modal.open {
    display: flex;
    transform: translateX(0);
}

.cart-modal.slide-in {
    animation: slideInRight var(--transition-normal) ease-out;
}

.cart-modal.slide-out {
    animation: slideOutRight var(--transition-normal) ease-in;
}

/* Header do Carrinho */
.cart-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
    position: relative;
}

.cart-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.cart-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cart-title::before {
    content: '🛒';
    font-size: 1.25rem;
}

.cart-count {
    background: var(--primary-color);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    min-width: 1.5rem;
    text-align: center;
}

.cart-close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
}

.cart-close-btn:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

/* Corpo do Modal */
.cart-body {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    background: var(--white);
}

.cart-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
    padding: 0.5rem;
    border-radius: 50%;
    transition: all var(--transition-fast);
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cart-close:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

/* Corpo do Carrinho */

.cart-items {
    flex: 1;
    margin-bottom: 1.5rem;
}

/* Item do Carrinho */
.cart-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.cart-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.cart-item:last-child {
    margin-bottom: 0;
}

.cart-item-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.cart-item-image {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius);
    object-fit: cover;
    border: 1px solid var(--gray-200);
    background: var(--gray-50);
    flex-shrink: 0;
}

.cart-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
}

.cart-item-info {
    flex: 1;
    min-width: 0;
}

.cart-item-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    line-height: 1.3;
}

.cart-item-price {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.cart-item-subtotal {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Controles de Quantidade */
.cart-item-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-100);
}

.quantity-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gray-50);
    border-radius: var(--border-radius);
    padding: 0.25rem;
}

.quantity-btn {
    width: 2rem;
    height: 2rem;
    border: none;
    background: var(--white);
    color: var(--text-primary);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    user-select: none;
}

.quantity-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: scale(1.05);
}

.quantity-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--gray-200);
    color: var(--gray-400);
}

.quantity-btn:disabled:hover {
    background: var(--gray-200);
    color: var(--gray-400);
    transform: none;
}

.quantity-input {
    width: 3rem;
    text-align: center;
    border: none;
    background: transparent;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    pointer-events: none;
}

/* Botão Remover */
.remove-item-btn {
    background: var(--error-color);
    color: var(--white);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.remove-item-btn:hover {
    background: #b91c1c;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(220, 38, 38, 0.3);
}

.remove-item-btn:active {
    transform: translateY(0);
}

/* Estado Vazio */
.cart-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.cart-empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.cart-empty-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.cart-empty-text {
    font-size: 1rem;
    margin-bottom: 2rem;
    line-height: 1.5;
}

/* Footer do Carrinho */
.cart-footer {
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
    padding: 1.5rem;
}

.cart-total-section {
    margin-bottom: 1.5rem;
}

.cart-total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.cart-total-row:last-child {
    margin-bottom: 0;
}

.cart-total-row.total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    padding-top: 0.75rem;
    border-top: 2px solid var(--gray-300);
}

.cart-total-label {
    font-weight: 500;
}

.cart-total-value {
    font-weight: 600;
}

.cart-total-row.total .cart-total-value {
    color: var(--primary-color);
    font-size: 1.375rem;
}

/* Botões de Ação */
.cart-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.cart-btn {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 3rem;
}

.cart-btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.cart-btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
}

.cart-btn-secondary {
    background: var(--white);
    color: var(--text-primary);
    border: 1px solid var(--gray-300);
}

.cart-btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
    transform: translateY(-1px);
}

.cart-btn-success {
    background: var(--success-color);
    color: var(--white);
}

.cart-btn-success:hover {
    background: #15803d;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(22, 163, 74, 0.3);
}

.cart-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Overlay */
.cart-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7) !important;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    display: none;
    transition: all var(--transition-fast);
}

.cart-overlay.open {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
}

/* Notificações */
.cart-notification {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--success-color);
    color: var(--white);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    transform: translateX(400px);
    transition: transform var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 350px;
}

.cart-notification.show {
    transform: translateX(0);
}

.cart-notification-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.cart-notification-content {
    flex: 1;
}

.cart-notification-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.cart-notification-text {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Animações */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

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

@keyframes scaleIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* Estados de Loading */
.cart-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.cart-loading-spinner {
    width: 2rem;
    height: 2rem;
    border: 2px solid var(--gray-200);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsividade */
@media (max-width: 768px) {
    .cart-modal {
        max-width: 100%;
    }
    
    .cart-header,
    .cart-body,
    .cart-footer {
        padding: 1rem;
    }
    
    .cart-item-header {
        flex-direction: column;
        text-align: center;
    }
    
    .cart-item-image {
        width: 100%;
        max-width: 120px;
        height: 120px;
        margin: 0 auto 1rem;
    }
    
    .cart-item-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .quantity-control {
        justify-content: center;
    }
    
    .remove-item-btn {
        width: 100%;
        justify-content: center;
    }
    
    .cart-actions {
        gap: 0.5rem;
    }
    
    .cart-btn {
        padding: 1rem;
        font-size: 1rem;
    }
    
    .cart-notification {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .cart-modal {
        border-radius: 0;
    }
    
    .cart-item {
        padding: 0.75rem;
    }
    
    .cart-total-row.total {
        font-size: 1.125rem;
    }
    
    .cart-btn {
        padding: 0.875rem 1rem;
        font-size: 0.95rem;
    }
}

/* Tema Escuro (Opcional) */
@media (prefers-color-scheme: dark) {
    .cart-modal {
        background: var(--gray-900);
        color: var(--white);
    }
    
    .cart-header,
    .cart-footer {
        background: var(--gray-800);
        border-color: var(--gray-700);
    }
    
    .cart-item {
        background: var(--gray-800);
        border-color: var(--gray-700);
    }
    
    .cart-item:hover {
        border-color: var(--primary-light);
    }
    
    .quantity-control {
        background: var(--gray-700);
    }
    
    .quantity-btn {
        background: var(--gray-600);
        color: var(--white);
    }
    
    .quantity-btn:hover:not(:disabled) {
        background: var(--primary-color);
    }
    
    .quantity-input {
        color: var(--white);
    }
    
    .cart-btn-secondary {
        background: var(--gray-700);
        color: var(--white);
        border-color: var(--gray-600);
    }
    
    .cart-btn-secondary:hover {
        background: var(--gray-600);
        border-color: var(--gray-500);
    }
}