/* Research Page Styles */

/* Research Header */
.research-header {
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, #0a1520 100%);
    padding: var(--spacing-5xl) 0;
    position: relative;
    overflow: hidden;
}

.research-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

/* Evidence Stats */
.evidence-section {
    background: linear-gradient(to bottom, #0a1520, var(--color-bg-primary));
    padding: var(--spacing-3xl) 0;
}

.evidence-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.evidence-stat {
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.evidence-value {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.evidence-label {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Filters Section */
.filters-section {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-secondary);
}

.filters-bar {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-md) var(--spacing-3xl);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-full);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.search-box input::placeholder {
    color: var(--color-text-tertiary);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--color-text-tertiary);
}

.filter-group {
    display: flex;
    gap: var(--spacing-md);
}

.filter-group select {
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    padding-right: var(--spacing-2xl);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.filter-group select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.filter-group select option {
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.filter-count {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* Research Grid */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

/* Research Card */
.research-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.research-card:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.research-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.research-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-accent);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius-sm);
}

.research-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.research-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
}

.research-title a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.research-title a:hover {
    color: var(--color-accent);
}

.research-abstract {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.research-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.research-meta strong {
    color: var(--color-text-secondary);
}

.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.research-tags .tag {
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-tertiary);
    font-size: 0.7rem;
    border-radius: var(--border-radius-full);
}

.research-read-more {
    display: inline-flex;
    align-items: center;
    color: var(--color-accent);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.research-read-more:hover {
    gap: var(--spacing-xs);
}

/* Loading Spinner */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4xl);
    grid-column: 1 / -1;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(0, 212, 255, 0.1);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-spinner p {
    margin-top: var(--spacing-md);
    color: var(--color-text-tertiary);
}

/* Responsive */
@media (max-width: 992px) {
    .evidence-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .filter-group {
        flex-direction: column;
    }
    
    .filter-group select {
        width: 100%;
    }
    
    .evidence-value {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .evidence-stats {
        grid-template-columns: 1fr;
    }
}