.sidebar-header {
    padding: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
}

.new-chat-btn-small {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    /* Push to right */
    transition: all 0.2s;
}

.new-chat-btn-small:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

.app-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    line-height: 1;
    /* Help vertically center relative to flex icon */
    display: flex;
    align-items: center;
    padding-top: 15px;
    /* Shift text down a few pixels to align with icon */
}

.menu-btn {
    color: var(--text-secondary);
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background-color var(--transition-speed);
}

.menu-btn:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

.sidebar-nav {
    padding: 0 12px;
    margin-bottom: 16px;
}

.nav-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
    font-size: 0.95rem;
    text-align: left;
    margin-bottom: 4px;
}

.nav-item:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--bg-nav-item-active);
    color: var(--accent-color);
}

.nav-item.active:hover {
    background-color: var(--accent-transparent-heavy);
}

.nav-item.active .nav-icon {
    stroke: var(--accent-color);
}

.nav-icon {
    stroke: var(--text-secondary);
    transition: stroke 0.2s;
}

.nav-item:hover .nav-icon {
    stroke: var(--text-primary);
}

.new-chat-container {
    padding: 0 var(--space-md);
    margin-bottom: var(--space-lg);
}

.new-chat-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background-color: var(--bg-surface-hover);
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: 24px;
    /* Pill shape */
    width: fit-content;
    transition: all var(--transition-speed);
}

.new-chat-btn:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
    opacity: 0.9;
}

body.light-theme .new-chat-btn {
    background-color: var(--accent-transparent);
    color: var(--accent-color);
}

body.light-theme .new-chat-btn:hover {
    background-color: var(--accent-transparent-heavy);
}

.plus-icon {
    font-size: 1.2rem;
    line-height: 1;
}

.recent-chats {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--space-sm);
}

.section-title {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin: 16px 24px 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Gems */
.gems-list {
    margin-bottom: 16px;
    max-height: calc(42px * 5 + 16px);
    overflow-y: auto;
    padding: 0 12px;
    position: relative;
    flex-shrink: 0;
    transition: max-height 0.3s ease;
}

.gems-list.expanded {
    max-height: 60vh;
}


.gems-list::-webkit-scrollbar {
    width: 4px;
}

.gems-list::-webkit-scrollbar-track {
    background: transparent;
}

.gems-list::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}

.gems-list::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-tertiary);
}

.gem-item {
    width: 100%;
    padding: 10px 12px;
    /* Adjusted padding */
    display: flex;
    align-items: center;
    gap: 12px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 0.9rem;
    text-align: left;
    border-radius: 8px;
    /* Added border-radius */
    margin-bottom: 2px;
    /* Added small gap */
}

.gem-item:hover {
    background-color: var(--bg-surface-hover);
}

.gem-icon {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.gem-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chain-indicator {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-left: auto;
    flex-shrink: 0;
}

.gem-item:hover .chain-indicator {
    opacity: 1;
}

.create-gem-btn,
.explore-gems-btn {
    color: var(--accent-color);
}

/* History */
.history-list {
    display: flex;
    flex-direction: column;
    transition: max-height 0.3s ease;
    padding: 0 12px;
    /* Added padding to match nav */
}

.history-list.expanded {
    max-height: 500px;
    /* Approx 14 items */
    overflow-y: auto;
    padding-right: 4px;
    /* Space for scrollbar */
}

/* Custom scrollbar for history list */
.history-list.expanded::-webkit-scrollbar {
    width: 4px;
}

.history-list.expanded::-webkit-scrollbar-track {
    background: transparent;
}

.history-list.expanded::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}

/* History Item Wrapper */
.history-item-wrapper {
    display: flex;
    align-items: center;
    position: relative;
    margin-bottom: 2px;
    border-radius: 8px;
    transition: background-color 0.2s;
}

.history-item-wrapper:hover {
    background-color: var(--bg-surface-hover);
}

.history-item-wrapper:hover .history-menu-btn {
    opacity: 1;
}

.history-item {
    flex: 1;
    padding: 10px 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
    text-align: left;
    border-radius: 8px;
    min-width: 0;
}

.history-item:hover {
    background-color: transparent;
}

.history-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.history-icon {
    color: var(--text-secondary);
    width: 16px;
    height: 16px;
    min-width: 16px;
    min-height: 16px;
}

/* Shared icons replace chat icon */
.history-icon.shared-icon {
    font-size: 0.85rem;
    width: 16px;
    min-width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.history-icon.shared-icon.shared-by-me {
    opacity: 0.9;
}

.history-icon.shared-icon.shared-with-me {
    opacity: 1;
}

/* Gems Title with Explore Button */
.gems-title {
    display: flex;
    align-items: center;
    gap: 4px;
    position: relative;
}

.gems-title .explore-gems-btn {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    opacity: 0.6;
}

.gems-title .explore-gems-btn:hover {
    background: var(--bg-surface-hover);
    color: var(--accent-color);
    opacity: 1;
}

.gems-empty-state {
    padding: 12px 16px;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
}

/* History Title with Filter */
.history-title {
    display: flex;
    align-items: center;
    gap: 4px;
    position: relative;
}

.history-filter-btn {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    opacity: 0.6;
}

.history-filter-btn:hover {
    background: var(--bg-surface-hover);
    opacity: 1;
}

.history-filter-btn.active {
    color: var(--accent-color);
    opacity: 1;
}

.history-filter-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    min-width: 160px;
    padding: 4px;
    margin-top: 4px;
}

.history-filter-dropdown.hidden {
    display: none;
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.85rem;
    border-radius: 6px;
    transition: background-color 0.2s;
    text-align: left;
}

.filter-option:hover {
    background-color: var(--bg-surface-hover);
}

.filter-option.active {
    background-color: rgba(243, 123, 32, 0.15);
    color: var(--accent-color);
}

/* Rename Modal */
.rename-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease-out;
}

.rename-modal {
    background: var(--bg-surface);
    border-radius: 16px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    animation: slideUp 0.2s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.rename-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.rename-modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.rename-modal-header .close-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.5rem;
    border-radius: 8px;
    transition: background-color 0.2s;
}

.rename-modal-header .close-btn:hover {
    background-color: var(--bg-surface-hover);
}

.rename-modal-body {
    padding: 20px;
}

.rename-modal-body label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.rename-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.rename-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(243, 123, 32, 0.15);
}

.char-count {
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

.rename-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.rename-modal-footer .cancel-btn {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.rename-modal-footer .cancel-btn:hover {
    background: var(--bg-surface-hover);
}

.rename-modal-footer .save-btn {
    padding: 10px 24px;
    background: var(--accent-color);
    border: none;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: opacity 0.2s;
}

.rename-modal-footer .save-btn:hover {
    opacity: 0.9;
}

.rename-modal-footer .save-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Sidebar Footer Layout */
.sidebar-footer {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
}

/* History Menu Button (3 dots) */
.history-menu-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    opacity: 0;
    transition: opacity 0.2s, background-color 0.2s, color 0.2s;
    flex-shrink: 0;
    margin-right: 4px;
}

.history-menu-btn:hover {
    background-color: var(--bg-body);
    color: var(--text-primary);
}

/* History Dropdown Menu */
.history-dropdown {
    position: absolute;
    right: 0;
    top: 100%;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    min-width: 140px;
    padding: 4px;
}

.history-dropdown.hidden {
    display: none;
}

.history-dropdown .dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.85rem;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.history-dropdown .dropdown-item:hover {
    background-color: var(--bg-surface-hover);
}

.history-dropdown .dropdown-item svg {
    color: var(--text-secondary);
}

.history-dropdown .delete-btn:hover {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.history-dropdown .delete-btn:hover svg {
    color: #ef4444;
}

/* Share Modal */
.share-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
}

.share-modal {
    background: var(--bg-surface);
    border-radius: 16px;
    width: 90%;
    max-width: 400px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

.share-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.share-modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.share-modal-header .close-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.5rem;
    border-radius: 8px;
    transition: background-color 0.2s;
}

.share-modal-header .close-btn:hover {
    background-color: var(--bg-surface-hover);
}

.share-modal-body {
    padding: 16px 20px;
    overflow-y: auto;
    flex: 1;
}

.share-description {
    margin: 0 0 12px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.users-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 300px;
    overflow-y: auto;
}

.user-checkbox {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg-body);
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.user-checkbox:hover {
    background: var(--bg-surface-hover);
}

.user-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-color);
    cursor: pointer;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.user-email {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.share-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.share-modal-footer .cancel-btn {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.share-modal-footer .cancel-btn:hover {
    background: var(--bg-surface-hover);
}

.share-modal-footer .save-btn {
    padding: 10px 20px;
    background: var(--accent-color);
    border: none;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: opacity 0.2s;
}

.share-modal-footer .save-btn:hover {
    opacity: 0.9;
}

/* Show More & Search */
.show-more-btn {
    width: calc(100% - 24px);
    /* Account for margin */
    margin: 0 12px;
    /* Match padding */
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 6px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: color 0.2s;
    border-radius: 8px;
    /* Added border-radius */
}

.show-more-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
    /* Added background on hover */
}

.history-search-container,
.gems-search-container {
    padding: 8px 16px 12px;
}

.history-search-container.hidden,
.gems-search-container.hidden {
    display: none;
}

.history-search-input,
.gems-search-input {
    width: 100%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px 10px;
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
}

.history-search-input:focus,
.gems-search-input:focus {
    border-color: var(--accent-color);
}

.chevron-down {
    transition: transform 0.3s;
}

.chat-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chat-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 10px var(--space-md);
    border-radius: 20px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-speed);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item:hover {
    background-color: var(--bg-surface-hover);
}

.chat-item.active {
    background-color: var(--bg-chat-item-active);
    /* Active state color */
    color: var(--text-chat-item-active);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.sidebar-footer {
    padding: var(--space-md);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    /* Ensure it stays at bottom even if content is short */
}

.settings-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    padding: var(--space-sm);
    width: 100%;
    border-radius: 8px;
    transition: background-color var(--transition-speed);
}

.settings-btn:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}