/**
 * Sources Panel Styles
 * Dedicated panel for displaying research sources
 */

.sources-panel {
    background: var(--card-background, #f9f9f9);
    /* Border on right side since panel is on left */
    border-right: 1px solid var(--border-color, #e5e5e5);
    display: flex;
    flex-direction: column;
    /* Height inherited from flex parent (.app-container with height: 100vh) */
    /* Removed overflow:hidden to allow resize handle visibility and scrolling */
}

.sources-panel-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color, #e5e5e5);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-background, #ffffff);
    gap: 12px;
}

/* Collapse toggle button */
.collapse-toggle {
    background: transparent;
    border: none;
    font-size: 18px;
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 6px;
    color: var(--text-secondary, #666);
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.collapse-toggle:hover {
    background: var(--background-secondary, #f0f0f0);
    color: var(--primary, #4a90e2);
}

/* Collapsed state adjustments */
#sources-panel.collapsed .sources-panel-header {
    padding: 12px;
    justify-content: center;
    writing-mode: vertical-lr;
    text-orientation: mixed;
}

#sources-panel.collapsed .collapse-toggle {
    writing-mode: horizontal-tb;
    transform: rotate(0deg);
}

.sources-panel-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary, #333);
}

.source-count {
    font-size: 14px;
    color: var(--text-secondary, #666);
    background: var(--background-secondary, #f0f0f0);
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 500;
}

.sources-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.sources-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    color: var(--text-secondary, #888);
}

.sources-empty-state svg {
    margin-bottom: 16px;
    opacity: 0.5;
    color: var(--text-secondary, #888);
}

.sources-empty-state p {
    margin: 8px 0 4px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary, #666);
}

.sources-empty-state span {
    font-size: 14px;
    color: var(--text-secondary, #999);
}

/* Dark mode */
.dark-mode .sources-panel {
    background: var(--card-background-dark, #1a1a1a);
    border-right-color: var(--border-color-dark, #333);
}

.dark-mode .sources-panel-header {
    background: var(--card-background-dark, #222);
    border-bottom-color: var(--border-color-dark, #333);
}

.dark-mode .collapse-toggle {
    color: var(--text-secondary-dark, #aaa);
}

.dark-mode .collapse-toggle:hover {
    background: var(--background-secondary-dark, #333);
    color: var(--primary, #4a90e2);
}

.dark-mode .sources-panel-header h3 {
    color: var(--text-primary-dark, #eee);
}

.dark-mode .source-count {
    background: var(--background-secondary-dark, #333);
    color: var(--text-secondary-dark, #aaa);
}

.dark-mode .sources-empty-state {
    color: var(--text-secondary-dark, #888);
}

.dark-mode .sources-empty-state p {
    color: var(--text-primary-dark, #aaa);
}

.dark-mode .sources-empty-state span {
    color: var(--text-secondary-dark, #666);
}