/*
 * WebFAVET - Useful Links Stylesheet
 * Premium UI/UX Categorized Directives & Styling
 */

.filter-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    background-color: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.search-box {
    position: relative;
    width: 100%;
}

.filter-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.category-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background-color: var(--background);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius-md); /* 10px */
    font-weight: 600;
    font-family: var(--font-heading);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.btn-icon {
    font-weight: 800;
    margin-right: 0.25rem;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.link-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg); /* 18px */
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--primary);
    opacity: 0.8;
    transition: var(--transition);
}

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

.link-card:hover::before {
    background-color: var(--accent);
}

.link-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
    gap: 1rem;
}

.link-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.3;
}

.link-card-badge {
    font-size: 0.725rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm); /* 6px */
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

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

.badge-academico {
    background-color: var(--info-light);
    color: var(--info);
}

.badge-institucional {
    background-color: var(--accent-light);
    color: var(--accent-hover);
}

.link-card-body {
    margin-bottom: 1.75rem;
    flex-grow: 1;
}

.link-description {
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.5;
}

.link-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 1.25rem;
    margin-top: auto;
}

.link-visit {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.link-visit:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    background-color: var(--surface);
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Responsive overrides */
@media (max-width: 768px) {
    .filter-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .category-filters {
        justify-content: center;
    }
}