/* front_assets/css/pyq-library.css */

:root {
    --accent-red: #E03B3B;
    --accent-dark: #1a2639;
    --secondary-bg: #f5f7fa;
    --text-primary: #2d3a4f;
    --text-secondary: #5e6f8d;
    --border-light: #eef2f6;
    --shadow-soft: 0 10px 30px -15px rgba(0,0,0,0.1);
    --shadow-hover: 0 20px 35px -18px rgba(224,59,59,0.15);
    --transition: all 0.25s ease;
}

/* --- Modern Header --- */
.pyq-header {
    background: linear-gradient(145deg, var(--accent-dark) 0%, #2c3a55 100%);
    padding: 200px 0 80px;
    position: relative;
    margin-bottom: -40px;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.header-badge {
    background: rgba(224,59,59,0.15);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(224,59,59,0.3);
    color: white;
    padding: 6px 20px;
    border-radius: 40px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.header-badge i {
    color: var(--accent-red);
}

.pyq-header h1 {
    color: white;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.pyq-header .lead {
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 30px;
}

/* --- Quick Stats --- */
.quick-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
}

.stat-item .number {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 5px;
}

.stat-item .label {
    color: rgba(255,255,255,0.6);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* --- Search Section --- */
.search-section {
    background: white;
    border-radius: 60px;
    padding: 5px;
    box-shadow: 0 15px 35px -15px rgba(0,0,0,0.15);
    max-width: 500px;
    margin: 30px auto 0;
    display: flex;
    align-items: center;
}

.search-section i {
    color: var(--text-secondary);
    margin-left: 20px;
    font-size: 1rem;
}

.search-section input {
    border: none;
    padding: 15px 15px 15px 10px;
    width: 100%;
    border-radius: 60px;
    font-size: 0.95rem;
}

.search-section input:focus {
    outline: none;
}

.search-section input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

/* --- Filter Chips --- */
.filter-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin: 30px 0 40px;
}

.filter-chip {
    padding: 8px 22px;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--border-light);
    background: white;
    color: var(--text-primary);
    transition: var(--transition);
    cursor: pointer;
}

.filter-chip:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.filter-chip.active {
    background: var(--accent-dark);
    color: white;
    border-color: var(--accent-dark);
}

/* --- Featured Papers Section --- */
.section-title {
    font-size: 1.5rem;
    color: var(--accent-dark);
    margin-bottom: 25px;
    position: relative;
    padding-left: 15px;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 5px;
    width: 4px;
    background: var(--accent-red);
    border-radius: 4px;
}

.paper-card {
    background: white;
    border-radius: 20px;
    padding: 25px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    height: 100%;
}

.paper-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-red);
}

.paper-card.featured {
    border-left: 4px solid var(--accent-red);
}

.featured-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--accent-red);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}

.paper-card-header {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.uni-badge {
    background: var(--accent-dark);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}

.year-badge {
    background: rgba(224,59,59,0.1);
    color: var(--accent-red);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}

.paper-card h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--accent-dark);
}

.paper-card p {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 20px;
}

.paper-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px dashed var(--border-light);
    padding-top: 15px;
    margin-top: auto;
}

.paper-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.paper-meta i {
    color: var(--accent-red);
}

/* --- University Cards --- */
.uni-card {
    background: white;
    border-radius: 24px;
    padding: 28px;
    height: 100%;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.uni-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-red);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: rgba(224,59,59,0.1);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: var(--transition);
}

.uni-card:hover .card-icon {
    background: var(--accent-red);
}

.card-icon i {
    font-size: 1.8rem;
    color: var(--accent-red);
    transition: var(--transition);
}

.uni-card:hover .card-icon i {
    color: white;
}

.uni-card h3 {
    font-size: 1.3rem;
    color: var(--accent-dark);
    margin-bottom: 8px;
}

.uni-card .uni-type {
    font-size: 0.8rem;
    color: var(--accent-red);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 15px;
}

.uni-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
    flex-grow: 1;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--border-light);
    padding-top: 18px;
    margin-top: auto;
}

.paper-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.paper-badge i {
    color: var(--accent-red);
}

.view-link {
    color: var(--accent-dark);
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}

.view-link i {
    font-size: 0.7rem;
    transition: var(--transition);
}

.uni-card:hover .view-link i {
    transform: translateX(3px);
    color: var(--accent-red);
}

/* --- Recent Papers Section --- */
.recent-grid {
    background: white;
    border-radius: 24px;
    border: 1px solid var(--border-light);
    overflow: hidden;
}

.recent-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
    cursor: pointer;
}

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

.recent-item:hover {
    background: var(--secondary-bg);
    padding-left: 30px;
}

.recent-icon {
    width: 50px;
    height: 50px;
    background: rgba(224,59,59,0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.recent-icon i {
    font-size: 1.5rem;
    color: var(--accent-red);
}

.recent-content {
    flex: 1;
}

.recent-content h4 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--accent-dark);
}

.recent-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}

.recent-date {
    font-size: 0.7rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* --- Modal Design --- */
.modal-modern .modal-content {
    border-radius: 28px;
    border: none;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}

.modal-modern .modal-header {
    background: var(--accent-dark);
    padding: 30px;
    border: none;
}

.modal-header-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.modal-header-icon {
    width: 55px;
    height: 55px;
    background: rgba(224,59,59,0.15);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-header-icon i {
    font-size: 1.8rem;
    color: var(--accent-red);
}

.modal-header-text h5 {
    color: white;
    font-size: 1.3rem;
    margin-bottom: 5px;
}

.modal-header-text small {
    color: rgba(255,255,255,0.6);
    font-size: 0.8rem;
}

.modal-body {
    padding: 25px;
    max-height: 60vh;
    overflow-y: auto;
}

/* Custom Scrollbar */
.modal-body::-webkit-scrollbar {
    width: 6px;
}

.modal-body::-webkit-scrollbar-track {
    background: var(--border-light);
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--accent-red);
    border-radius: 10px;
}

.paper-item {
    background: var(--secondary-bg);
    border-radius: 18px;
    padding: 18px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.paper-item:hover {
    background: white;
    border-color: var(--accent-red);
}

.paper-year {
    background: var(--accent-dark);
    color: white;
    padding: 5px 16px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.9rem;
    min-width: 80px;
    text-align: center;
}

.paper-info {
    flex: 1;
}

.paper-info h6 {
    margin: 0;
    color: var(--accent-dark);
    font-size: 1rem;
}

.paper-info small {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.paper-actions {
    display: flex;
    gap: 10px;
}

.btn-action {
    padding: 8px 18px;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-attempt {
    background: var(--accent-red);
    color: white;
}

.btn-attempt:hover {
    background: var(--accent-dark);
    color: white;
}

.btn-download {
    background: white;
    color: var(--accent-dark);
    border: 1px solid var(--border-light);
}

.btn-download:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.btn-disabled {
    background: #e2e8f0;
    color: #94a3b8;
    cursor: not-allowed;
    border: none;
}

.modal-footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-light);
    padding: 18px 25px;
}

.btn-close-modern {
    padding: 10px 28px;
    border-radius: 40px;
    border: 1px solid var(--border-light);
    background: white;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

.btn-close-modern:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

/* --- Toast Notifications --- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.toast {
    background: white;
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
    border-left: 4px solid;
}

.toast-success {
    border-left-color: #10b981;
}

.toast-success i {
    color: #10b981;
}

.toast-error {
    border-left-color: var(--accent-red);
}

.toast-error i {
    color: var(--accent-red);
}

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

@keyframes slideOut {
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* --- Availability Message --- */
.availability-msg {
    display: block;
    color: #f59e0b;
    font-size: 0.7rem;
    margin-top: 5px;
}

.paper-item.disabled {
    opacity: 0.7;
    background: #f8fafc;
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: white;
    border-radius: 24px;
    border: 1px dashed var(--border-light);
}

.empty-state i {
    font-size: 3rem;
    color: var(--border-light);
    margin-bottom: 15px;
}

.empty-state h5 {
    color: var(--accent-dark);
    margin-bottom: 5px;
}

.empty-state p {
    color: var(--text-secondary);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .pyq-header h1 {
        font-size: 2.2rem;
    }
    
    .quick-stats {
        gap: 25px;
    }
    
    .stat-item .number {
        font-size: 1.5rem;
    }
    
    .paper-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .paper-actions {
        width: 100%;
    }
    
    .paper-actions a,
    .paper-actions button {
        flex: 1;
        text-align: center;
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .filter-container {
        gap: 8px;
    }
    
    .filter-chip {
        padding: 6px 16px;
        font-size: 0.8rem;
    }
    
    .modal-header-content {
        flex-direction: column;
        text-align: center;
    }
}
/* Pagination Styles */
.pagination-container {
    margin-top: 40px;
    padding: 20px 0;
}

.pagination-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

/* Mobile view */
.pagination-mobile {
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.pagination-mobile .pagination-prev,
.pagination-mobile .pagination-next {
    padding: 10px 24px;
    background: white;
    border: 1px solid var(--border-light);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.pagination-mobile .pagination-prev:hover,
.pagination-mobile .pagination-next:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
    transform: translateY(-2px);
}

.pagination-mobile .pagination-prev.disabled,
.pagination-mobile .pagination-next.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Desktop view */
.pagination-desktop {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    flex-wrap: wrap;
    gap: 20px;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.pagination-info .font-medium {
    color: var(--accent-dark);
    font-weight: 600;
}

.pagination-links {
    display: flex;
    gap: 5px;
    background: white;
    padding: 5px;
    border-radius: 50px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-soft);
}

.pagination-link,
.pagination-current,
.pagination-dots {
    min-width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.pagination-link {
    color: var(--text-primary);
    background: transparent;
    border: 1px solid transparent;
}

.pagination-link:hover {
    background: var(--secondary-bg);
    border-color: var(--accent-red);
    color: var(--accent-red);
    transform: translateY(-2px);
}

.pagination-current {
    background: var(--accent-dark);
    color: white;
    font-weight: 600;
    border: 1px solid var(--accent-dark);
    box-shadow: 0 4px 10px rgba(26, 38, 57, 0.2);
}

.pagination-prev-link,
.pagination-next-link {
    min-width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 40px;
    background: white;
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.pagination-prev-link:hover,
.pagination-next-link:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
    transform: translateX(-3px);
}

.pagination-next-link:hover {
    transform: translateX(3px);
}

.pagination-prev-link.disabled,
.pagination-next-link.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    background: var(--secondary-bg);
}

.pagination-prev-link svg,
.pagination-next-link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* Responsive */
@media (max-width: 768px) {
    .pagination-desktop {
        flex-direction: column;
        align-items: center;
    }
    
    .pagination-info {
        text-align: center;
    }
    
    .pagination-links {
        flex-wrap: wrap;
        justify-content: center;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0;
    }
    
    .pagination-link,
    .pagination-current {
        min-width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .pagination-links {
        gap: 3px;
    }
    
    .pagination-link,
    .pagination-current {
        min-width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
    
    .pagination-prev-link,
    .pagination-next-link {
        min-width: 36px;
        height: 36px;
    }
}