/* ====================================
   RESEARCHERS NETWORK - COMPONENTS
   Researcher cards and reusable elements
   ==================================== */

/* ============ RESEARCHER CARD ============ */
.researcher-card {
    background-color: #ffffff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid #f0f0f0;
}

.researcher-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

/* Card Image */
.card-image {
    position: relative;
    width: 100%;
    padding-top: 60%; /* 5:3 aspect ratio */
    background-color: #f5f5f5;
    overflow: hidden;
}

.card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.researcher-card:hover .card-image img {
    transform: scale(1.05);
}

/* Card Content */
.card-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
    background-color: #ffffff;
}

.card-date {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: #616161;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1.4;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-top: auto;
}

.card-country {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.card-country::before {
    content: '📍';
    font-size: 14px;
}

.card-research-areas {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: var(--spacing-xs);
}

.research-tag {
    display: inline-block;
    padding: 4px 10px;
    background-color: #f0f0f0;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
}

.research-tag:hover {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
}

/* Card Footer */
.card-footer {
    padding: var(--spacing-md);
    padding-top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #ffffff;
}

.card-publications {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

.card-publications strong {
    color: var(--text-primary);
    font-weight: 600;
}

.card-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: var(--gray-100);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
    color: var(--text-primary);
}

.card-link:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateX(2px);
}

.card-link svg {
    width: 16px;
    height: 16px;
}

/* Arrow Icon */
.arrow-icon {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ============ PAGINATION COMPONENT ============ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--white);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.pagination-btn:hover:not(.pagination-btn-disabled):not(.pagination-btn-active) {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.05);
}

.pagination-btn-active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
    cursor: default;
}

.pagination-btn-disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ============ EMPTY STATE ============ */
.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    text-align: center;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.empty-state-text {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    max-width: 400px;
    line-height: 1.6;
}

.empty-state-action {
    margin-top: var(--spacing-lg);
}

/* ============ BADGES ============ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    line-height: 1;
}

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

.badge-secondary {
    background-color: var(--gray-200);
    color: var(--text-primary);
}

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

/* ============ ALERTS ============ */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.alert-info {
    background-color: #e3f2fd;
    border-left: 4px solid #2196f3;
    color: #0d47a1;
}

.alert-success {
    background-color: #e8f5e9;
    border-left: 4px solid #4caf50;
    color: #1b5e20;
}

.alert-warning {
    background-color: #fff3e0;
    border-left: 4px solid #ff9800;
    color: #e65100;
}

.alert-error {
    background-color: #ffebee;
    border-left: 4px solid #f44336;
    color: #b71c1c;
}

/* ============ TOOLTIPS ============ */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 8px 12px;
    background-color: var(--gray-800);
    color: var(--white);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    z-index: 1000;
    transition: var(--transition);
    pointer-events: none;
}

.tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--gray-800);
}

.tooltip:hover .tooltip-content {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

/* ============ SKELETON LOADING ============ */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--gray-100) 0%,
        var(--gray-200) 50%,
        var(--gray-100) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-card {
    height: 400px;
    border-radius: var(--radius-lg);
}

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-title {
    height: 24px;
    width: 80%;
    margin-bottom: 12px;
}

/* ============ MODAL ============ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--black);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    line-height: 1;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--primary-color);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* ============ FADE IN ANIMATION ============ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

/* Stagger animation for cards */
.researcher-card {
    opacity: 0;
    animation: fadeIn 0.6s ease-out forwards;
}

.researcher-card:nth-child(1) { animation-delay: 0.05s; }
.researcher-card:nth-child(2) { animation-delay: 0.1s; }
.researcher-card:nth-child(3) { animation-delay: 0.15s; }
.researcher-card:nth-child(4) { animation-delay: 0.2s; }
.researcher-card:nth-child(5) { animation-delay: 0.25s; }
.researcher-card:nth-child(6) { animation-delay: 0.3s; }
.researcher-card:nth-child(7) { animation-delay: 0.35s; }
.researcher-card:nth-child(8) { animation-delay: 0.4s; }

/* ORCID Badge */
.card-orcid {
    display: flex;
    align-items: center;
    margin-top: 8px;
    padding: 4px 8px;
    background: rgba(166, 206, 57, 0.1);
    border-radius: 4px;
    width: fit-content;
}