/**
 * Cart Page Styles
 * Shopping cart with promotion banner and price summary
 */

/* Cart Container */
.cart-container {
    max-width: 900px;
    margin: 40px auto;
}

.cart-header {
    margin-bottom: 32px;
}

.cart-header h1 {
    color: var(--text-dark);
    margin-bottom: 8px;
}

.cart-header p {
    color: var(--text-medium);
}

/* Empty Cart */
.empty-cart {
    background: white;
    border-radius: var(--border-radius-card);
    padding: 64px 32px;
    text-align: center;
    box-shadow: var(--shadow-card);
}

.empty-cart-icon {
    font-size: 64px;
    color: var(--light-purple);
    margin-bottom: 24px;
}

.empty-cart h2 {
    color: var(--text-dark);
    margin-bottom: 16px;
}

.empty-cart p {
    color: var(--text-medium);
    margin-bottom: 24px;
}

/* Promotion Banner */
.promotion-banner {
    background: linear-gradient(135deg, #D4E4F7 0%, #F5F7FA 100%);
    border-left: 4px solid var(--primary-purple);
    border-radius: 16px;
    padding: 24px 32px;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 4px 12px rgba(30,58,95,0.1);
}

.promotion-icon {
    font-size: 48px;
    flex-shrink: 0;
}

.promotion-content h3 {
    color: var(--primary-purple);
    font-size: 20px;
    margin-bottom: 8px;
}

.promotion-content p {
    color: var(--text-dark);
    margin: 0;
    font-size: 15px;
}

/* Cart Items */
.cart-items {
    background: white;
    border-radius: var(--border-radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    margin-bottom: 24px;
}

.cart-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 24px;
    align-items: center;
    padding: 24px 32px;
    border-bottom: 1px solid var(--bg-light);
    transition: background var(--transition-speed) ease-in-out;
}

.cart-item:hover {
    background: var(--bg-light);
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-item.free-item {
    background: linear-gradient(90deg, #f0fff4 0%, white 100%);
    border-left: 4px solid #10b981;
}

.item-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.item-name {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 16px;
}

.item-meta {
    font-size: 14px;
    color: var(--text-medium);
}

.item-price {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-purple);
    text-align: right;
}

.free-item .item-price {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.original-price {
    text-decoration: line-through;
    color: var(--text-medium);
    font-size: 18px;
    font-weight: 400;
}

.free-label {
    background: #10b981;
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
    margin-top: 4px;
}

.remove-btn {
    background: transparent;
    border: none;
    color: #EE3F58;
    cursor: pointer;
    font-size: 24px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-speed) ease-in-out;
}

.remove-btn:hover {
    background: #fee;
    transform: scale(1.1);
}

/* Add More Button */
.add-more-section {
    text-align: center;
    margin-bottom: 32px;
}

.add-more-btn {
    background: white;
    border: 2px dashed var(--light-purple);
    color: var(--primary-purple);
    padding: 16px 32px;
    border-radius: var(--border-radius-button);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed) ease-in-out;
    display: inline-block;
}

.add-more-btn:hover {
    border-color: var(--primary-purple);
    background: var(--bg-light);
    transform: translateY(-2px);
    opacity: 1;
}

/* Price Summary */
.price-summary {
    background: white;
    border-radius: var(--border-radius-card);
    box-shadow: var(--shadow-card);
    padding: 32px;
    margin-bottom: 24px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    font-size: 16px;
}

.summary-row:not(:last-child) {
    border-bottom: 1px solid var(--bg-light);
}

.summary-row.discount {
    color: #10b981;
}

.summary-row.total {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-purple);
    padding-top: 20px;
    border-top: 2px solid var(--bg-light);
}

/* Payment Button */
.payment-section {
    text-align: center;
}

.payment-btn {
    width: 100%;
    max-width: 500px;
    padding: 18px;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(238,63,88,0.3);
}

.payment-btn:hover {
    box-shadow: 0 8px 20px rgba(238,63,88,0.4);
}

/* Badge */
.item-count-badge {
    background: var(--primary-purple);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    display: inline-block;
    margin-left: 12px;
}

/* Responsive */
@media (max-width: 640px) {
    .cart-container {
        margin: 20px 16px;
    }

    .promotion-banner {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

    .cart-item {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 20px;
    }

    .item-price {
        text-align: left;
        font-size: 20px;
    }

    .free-item .item-price {
        align-items: flex-start;
    }

    .remove-btn {
        position: absolute;
        top: 20px;
        right: 20px;
    }

    .cart-item {
        position: relative;
    }

    .price-summary {
        padding: 24px 20px;
    }

    .summary-row.total {
        font-size: 20px;
    }
}

/* Add More Button — secondary style when recommendations are shown */
.add-more-btn-secondary {
    opacity: 0.6;
    font-size: 14px;
    padding: 12px 24px;
}

/* === Smart Recommendations Section === */
.recommendations-section {
    margin-bottom: 32px;
}

.recommendations-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 8px;
}

.recommendations-header h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin: 0;
}

.promo-hint {
    color: #10b981;
    font-weight: 600;
    font-size: 14px;
    margin: 0;
}

.recommendations-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.recommendation-card {
    background: white;
    border-radius: var(--border-radius-card);
    box-shadow: var(--shadow-card);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 2px solid transparent;
}

.recommendation-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* "Will be free" highlight */
.rec-card-will-be-free {
    border-color: #10b981;
    background: linear-gradient(135deg, #f0fff4 0%, #ffffff 100%);
}

/* Type badges */
.rec-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    align-self: flex-start;
}

.rec-type-competition .rec-badge {
    background: #EDE9FE;
    color: #6D28D9;
}

.rec-type-webinar .rec-badge {
    background: #DBEAFE;
    color: #1D4ED8;
}

.rec-type-olympiad .rec-badge {
    background: #FEF3C7;
    color: #92400E;
}

.rec-type-publication .rec-badge {
    background: #D1FAE5;
    color: #065F46;
}

.rec-type-course .rec-badge {
    background: #FCE7F3;
    color: #9D174D;
}

.rec-title {
    font-weight: 600;
    font-size: 15px;
    color: var(--text-dark);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.rec-meta {
    font-size: 13px;
    color: var(--text-medium);
}

.rec-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    gap: 12px;
}

.rec-price {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-purple);
    white-space: nowrap;
}

.rec-price-free s {
    color: var(--text-medium);
    font-size: 14px;
    font-weight: 400;
}

.rec-free-badge {
    background: #10b981;
    color: white;
    padding: 2px 8px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 600;
}

.rec-price-from {
    font-size: 15px;
    color: var(--text-medium);
    font-weight: 500;
}

.rec-btn {
    padding: 8px 16px;
    border-radius: var(--border-radius-button);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    white-space: nowrap;
    border: none;
    text-decoration: none;
    display: inline-block;
}

.rec-btn-add {
    background: var(--primary-purple);
    color: white;
}

.rec-btn-add:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.rec-btn-add:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.rec-btn-link {
    background: transparent;
    color: var(--primary-purple);
    border: 1px solid var(--primary-purple);
}

.rec-btn-link:hover {
    background: var(--bg-light);
    color: var(--primary-purple);
    text-decoration: none;
}

/* Responsive: 2 columns on tablet, 1 on mobile */
@media (max-width: 900px) {
    .recommendations-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

    .recommendations-header {
        flex-direction: column;
        gap: 4px;
    }

    .rec-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .rec-btn {
        text-align: center;
    }
}

/* Loading State */
.cart-loading {
    text-align: center;
    padding: 64px 32px;
}

.cart-loading .spinner {
    margin: 0 auto;
}