/* KB Selector in Chat Input (Drop-up) */
.kb-selector-container {
    position: relative;
    display: none; /* Hidden by default, shown by JS for users with access */
    margin-left: 4px;
    margin-right: 4px;
    flex-shrink: 0;
}

.kb-selector-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    height: 42px;
}

.kb-selector-btn:hover {
    background: var(--bg-hover);
    border-color: rgba(212, 175, 55, 0.4);
}

/* Dark mode specific styles */
body.dark-theme .kb-selector-btn {
    border-color: rgba(255, 255, 255, 0.1);
}

body.dark-theme .kb-selector-btn:hover {
    background: rgba(255, 255, 255, 0.05);
}

.kb-selector-btn i.fa-book {
    font-size: 14px;
    color: var(--accent-color);
}

.kb-selector-btn i.fa-chevron-up {
    font-size: 10px;
    color: #888;
    transition: transform 0.2s;
}

.kb-selector-container.active .kb-selector-btn i.fa-chevron-up {
    transform: rotate(180deg);
}

/* Tooltip for KB selector button */
.kb-selector-btn[data-tooltip] {
    position: relative;
}

.kb-selector-btn[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: #fff;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    pointer-events: none;
    z-index: 1001;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.kb-selector-btn[data-tooltip]::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 2px);
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: rgba(0, 0, 0, 0.9);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    pointer-events: none;
    z-index: 1001;
}

.kb-selector-btn[data-tooltip]:hover::after,
.kb-selector-btn[data-tooltip]:hover::before {
    opacity: 1;
    visibility: visible;
}

body.dark-theme .kb-selector-btn[data-tooltip]::after {
    background: rgba(30, 30, 30, 0.95);
    border-color: rgba(255, 255, 255, 0.15);
}

body.dark-theme .kb-selector-btn[data-tooltip]::before {
    border-top-color: rgba(30, 30, 30, 0.95);
}

.kb-selector-dropdown {
    position: absolute;
    bottom: calc(100% + 8px);
    right: 0;
    left: auto;
    min-width: 320px;
    max-width: 380px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 -6px 30px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s;
    z-index: 1000;
    max-height: 400px;
    overflow-y: auto;
}

body.dark-theme .kb-selector-dropdown {
    box-shadow: 0 -6px 30px rgba(0, 0, 0, 0.5);
}

.kb-selector-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.kb-selector-header {
    padding: 12px 16px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

.kb-selector-options {
    padding: 6px 0;
}

.kb-selector-option {
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.15s;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.kb-selector-option:hover {
    background: var(--bg-hover);
}

.kb-selector-option.active {
    background: rgba(212, 175, 55, 0.1);
}

body.dark-theme .kb-selector-option.active {
    background: rgba(212, 175, 55, 0.15);
}

.kb-selector-option.active .kb-selector-option-title {
    color: var(--accent-color);
}

.kb-selector-option-icon {
    font-size: 16px;
    color: var(--accent-color);
    margin-top: 2px;
    flex-shrink: 0;
}

.kb-selector-option-content {
    flex: 1;
}

.kb-selector-option-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.kb-selector-option-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Scrollbar for dropdown */
.kb-selector-dropdown::-webkit-scrollbar {
    width: 6px;
}

.kb-selector-dropdown::-webkit-scrollbar-track {
    background: transparent;
}

.kb-selector-dropdown::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.kb-selector-dropdown::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Settings Modal KB Selector */
.settings-kb-selector {
    position: relative;
    width: 100%;
}

.settings-kb-btn {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.2s;
}

.settings-kb-btn:hover {
    border-color: var(--accent-color);
}

.settings-kb-btn i {
    font-size: 12px;
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.settings-kb-selector.active .settings-kb-btn i {
    transform: rotate(180deg);
}

.settings-kb-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
    z-index: 1000;
    max-height: 350px;
    overflow-y: auto;
}

body.dark-theme .settings-kb-dropdown {
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.5);
}

.settings-kb-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.settings-kb-header {
    padding: 12px 16px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

.settings-kb-options {
    padding: 6px 0;
}

.settings-kb-option {
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.15s;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.settings-kb-option:hover {
    background: var(--bg-hover);
}

.settings-kb-option.active {
    background: rgba(212, 175, 55, 0.1);
}

body.dark-theme .settings-kb-option.active {
    background: rgba(212, 175, 55, 0.15);
}

.settings-kb-option.active .settings-kb-option-title {
    color: var(--accent-color);
}

.settings-kb-option-icon {
    font-size: 16px;
    color: var(--accent-color);
    margin-top: 2px;
    flex-shrink: 0;
}

.settings-kb-option-content {
    flex: 1;
}

.settings-kb-option-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.settings-kb-option-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Scrollbar for settings dropdown */
.settings-kb-dropdown::-webkit-scrollbar {
    width: 6px;
}

.settings-kb-dropdown::-webkit-scrollbar-track {
    background: transparent;
}

.settings-kb-dropdown::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.settings-kb-dropdown::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .kb-selector-btn {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .kb-selector-dropdown {
        /* Drop-up positioned on mobile */
        position: fixed;
        left: 5%;
        right: 5%;
        transform: none;
        bottom: 80px; /* Above input area */
        top: auto;
        width: auto;
        max-height: 50vh;
    }
}