/* ============================================================================
   General Styles
   ============================================================================ */

:root {
    /* Light Mode Colors (Default) */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --primary-light: #BBDEFB;
    --secondary-color: #4CAF50;
    --danger-color: #F44336;
    --warning-color: #FF9800;
    --bg-primary: #FAFAFA;
    --bg-secondary: #FFFFFF;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #E0E0E0;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Dark Mode Colors */
html[data-theme="dark"] {
    --primary-color: #1565C0;
    --primary-dark: #0D47A1;
    --primary-light: #1E88E5;
    --secondary-color: #43A047;
    --danger-color: #E53935;
    --warning-color: #FB8C00;
    --bg-primary: #121212;
    --bg-secondary: #1E1E1E;
    --text-primary: #FFFFFF;
    --text-secondary: #B0B0B0;
    --border-color: #333333;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    width: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

body {
    display: flex;
    flex-direction: column;
}

/* ============================================================================
   Layout
   ============================================================================ */

.container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1rem 2rem;
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 100%;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    width: 50px;
    height: 28px;
    border-radius: 14px;
    padding: 2px;
    cursor: pointer;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    position: relative;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

.theme-toggle-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: left 0.3s;
}

.theme-toggle.dark .theme-toggle-slider {
    left: 24px;
}

#themeIcon {
    margin-top: 4px;
}

.header-tabs {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.tab-link {
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 4px 4px 0 0;
    background: rgba(255, 255, 255, 0.1);
    transition: background 0.3s;
    font-size: 0.95rem;
    font-weight: 500;
}

.tab-link:hover {
    background: rgba(255, 255, 255, 0.2);
}

.tab-link.active {
    background: white;
    color: var(--primary-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    font-size: 0.9rem;
}

.username {
    color: white;
    font-weight: 500;
}

.logout-link {
    color: white;
    text-decoration: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 0 0.25rem;
    transition: opacity 0.2s;
    opacity: 0.8;
}

.logout-link:hover {
    opacity: 1;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.connection-status {
    font-size: 1.2rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.main-content {
    flex: 1;
    overflow: hidden;
}

.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ============================================================================
   Buttons
   ============================================================================ */

.btn-primary {
    width: 100%;
    padding: 0.6rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.3s;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-primary);
}

.btn-danger {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s;
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    /* background: #D32F2F; */
    background: var(--danger-color);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* ============================================================================
   Chat Container
   ============================================================================ */

.chat-container {
    display: flex;
    height: 100%;
    gap: 0;
}

.chat-sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 1.1rem;
}

.conversations-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.conversation-item {
    padding: 0;
    margin: 0.25rem 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.conversation-info {
    flex: 1;
    padding: 0.75rem 1rem;
    cursor: pointer;
    overflow: hidden;
    transition: background 0.2s;
}

.conversation-item:hover {
    border: 1px solid var(--secondary-color);
}

.conversation-actions {
    display: flex;
    align-items: center;
    gap: 0;
    padding-right: 0.5rem;
}

.conv-rename-btn {
    background: transparent;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    padding: 0.5rem 0.5rem;
    font-size: 1.1rem;
    transition: all 0.2s;
    opacity: 0;
}

.conv-delete-btn {
    background: transparent;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    font-size: 1.2rem;
    transition: all 0.2s;
    opacity: 0;
}

.conversation-item:hover .conv-rename-btn,
.conversation-item:hover .conv-delete-btn {
    opacity: 1;
}

.conv-rename-btn:hover {
    transform: scale(1.2);
    color: var(--primary-dark);
}

.conv-delete-btn:hover {
    transform: scale(1.2);
    color: var(--danger-color);
}

.conversation-item.active {
    border: 1px solid var(--primary-light);
}

.conversation-item.active .conversation-info {
    /* background: var(--primary-light); */
}

.conversation-item.active .conv-title {
    font-weight: 600;
    /* color: var(--primary-color); */
}

.conv-timestamps {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.conv-title {
    font-size: 0.85rem;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 500;
}

.conv-meta {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.empty-state {
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================================================
   Chat Main Area
   ============================================================================ */

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;

    background-image: url(/static/chat/background/atlas-1.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    background-color: rgba(255, 255, 255, 0.9);
    background-blend-mode: overlay;
}

html[data-theme="dark"] .chat-main {
    background-color: rgba(0, 0, 0, 0.9);
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.messages-container::-webkit-scrollbar {
    width: 8px;
}

.messages-container::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

.messages-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ============================================================================
   Messages
   ============================================================================ */

.welcome-message {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
    margin: auto;
}

.welcome-message h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.welcome-message p {
    font-size: 1rem;
    margin: 0.5rem 0;
}

.conversation-header {
    text-align: center;
    padding: 2rem 2rem 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.conversation-header h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.conversation-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.message {
    display: flex;
    margin: 0.5rem 0;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-message {
    justify-content: flex-end;
}

.bot-message {
    justify-content: flex-start;
}

.error-message {
    justify-content: flex-start;
}

.message-content {
    max-width: 70%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
}

.user-message .message-content {
    background: var(--primary-color);
    color: white;
}

.bot-message .message-content {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.error-message .message-content {
    background: #FFEBEE;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

html[data-theme="dark"] .error-message .message-content {
    background: #3E2723;
    color: #FF8A80;
}

.message-role {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    opacity: 0.8;
}

.message-text {
    font-size: 0.95rem;
    line-height: 1.4;
    word-wrap: break-word;
}

.message-text strong {
    font-weight: 600;
}

.message-text em {
    font-style: italic;
}

/* ============================================================================
   Input Area
   ============================================================================ */

.input-area {
    border-top: 1px solid var(--border-color);
    padding: 1rem;
}

.input-wrapper {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

#messageInput {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.95rem;
    resize: none;
    overflow-y: auto;
    max-height: 150px;
}

html[data-theme="dark"] #messageInput {
    background: var(--bg-primary);
    color: var(--text-primary);
}

#messageInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.send-btn {
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.3s;
    white-space: nowrap;
}

.send-btn:hover {
    background: var(--primary-dark);
}

.send-btn:active {
    transform: scale(0.98);
}

.send-icon {
    font-size: 1.2rem;
}

.input-help {
    margin-top: 0.5rem;
    text-align: right;
    color: var(--text-secondary);
}

.input-help kbd {
    background: var(--bg-primary);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    border: 1px solid var(--border-color);
    font-family: monospace;
    font-size: 0.8rem;
}

html[data-theme="dark"] .input-help kbd {
    background: #2A2A2A;
    color: #E0E0E0;
}

/* ============================================================================
   Voice Input
   ============================================================================ */

.voice-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.voice-selector label {
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
    white-space: nowrap;
}

.voice-selector select {
    flex: 1;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.9rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.3s;
}

.voice-selector select:hover {
    border-color: var(--primary-color);
}

.voice-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.voice-btn {
    flex: 0 0 auto;
    width: 45px;
    height: 45px;
    padding: 0;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    margin: auto 0.5rem auto 0;
}

.voice-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.voice-btn:active {
    transform: scale(0.95);
}

.voice-btn.recording {
    background: var(--danger-color);
    animation: pulse-recording 1s infinite;
}

@keyframes pulse-recording {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.voice-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.voice-icon {
    display: inline-block;
    line-height: 1;
}

.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.voice-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--danger-color);
    border-radius: 4px;
    color: var(--danger-color);
    font-weight: 500;
    margin-top: 0.5rem;
}

.recording-animation {
    display: flex;
    gap: 0.3rem;
    align-items: center;
}

.recording-animation .dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--danger-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite;
}

.recording-animation .dot:nth-child(2) {
    animation-delay: 0.2s;
}

.recording-animation .dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes bounce {
    0%, 80%, 100% {
        opacity: 0.5;
        transform: scale(0.8);
    }
    40% {
        opacity: 1;
        transform: scale(1);
    }
}

/* ============================================================================
   Backend Selector
   ============================================================================ */

.backend-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.backend-selector label {
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
    white-space: nowrap;
}

.backend-selector select {
    flex: 1;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.9rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.3s;
}

.backend-selector select:hover {
    border-color: var(--primary-color);
}

.backend-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.backend-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 768px) {
    .chat-container {
        flex-direction: column;
    }

    .chat-sidebar {
        width: 100%;
        max-height: 200px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .conversations-list {
        max-height: 120px;
    }

    .header {
        padding: 0.75rem 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .header-info {
        font-size: 0.8rem;
    }

    .messages-container {
        padding: 1rem;
    }

    .message-content {
        max-width: 85%;
    }

    .input-area {
        padding: 0.75rem;
    }

    .backend-selector {
        flex-direction: column;
        margin-bottom: 0.5rem;
        gap: 0.5rem;
    }

    .backend-selector label {
        width: 100%;
    }

    .backend-selector select {
        width: 100%;
    }

    .backend-status {
        width: 100%;
        text-align: center;
    }

    .input-wrapper {
        gap: 0.25rem;
    }

    .send-btn {
        padding: 0.75rem 1rem;
    }

    .send-btn span:first-child {
        display: none;
    }

    .input-help {
        display: none;
    }
}

@media (max-width: 480px) {
    .header-content {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }

    .logo {
        font-size: 1rem;
    }

    .message-content {
        max-width: 95%;
    }

    .welcome-message {
        padding: 1rem;
    }

    .welcome-message h2 {
        font-size: 1.5rem;
    }

    .input-wrapper {
        flex-wrap: wrap;
    }

    .send-btn {
        padding: 0.6rem;
    }
}

/* ============================================================================
   Utilities
   ============================================================================ */

.hidden {
    display: none !important;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}
/* ============================================================================
   Knowledge Base Editor
   ============================================================================ */

.knowledge-container {
    display: flex;
    height: 100%;
    gap: 0;
}

.knowledge-sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.categories-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.category-item {
    margin-bottom: 0.5rem;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--primary-light);
    color: var(--text-primary);
    border-radius: 4px;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

html[data-theme="dark"] .category-header {
    background: var(--primary-color);
    color: white;
}

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

.files-list {
    padding-left: 0.5rem;
    border-left: 2px solid var(--border-color);
}

.file-item {
    margin: 0.25rem 0;
}

.file-link {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-align: left;
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: background 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-link:hover {
    background: var(--bg-primary);
}

.file-link.active {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

.btn-add-file {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: 1px dashed var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.85rem;
    transition: all 0.2s;
}

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

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0;
    font-size: 1rem;
    line-height: 1;
}

.btn-icon:hover {
    opacity: 0.7;
}

.knowledge-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-secondary);
}

.knowledge-editor {
    display: flex;
    flex-direction: column;
    height: 100%;
    gap: 0;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.editor-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.file-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.editor-actions {
    display: flex;
    gap: 0.5rem;
}

.editor-textarea {
    flex: 1;
    padding: 1.5rem;
    border: none;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Courier New', monospace;
    font-size: 0.95rem;
    resize: none;
    overflow-y: auto;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.editor-textarea:focus {
    outline: none;
    box-shadow: inset 0 0 0 2px var(--primary-color);
}

.knowledge-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-content {
    text-align: center;
    color: var(--text-secondary);
}

.empty-content p {
    font-size: 1.1rem;
    margin: 0;
}

/* ============================================================================
   Notes
   ============================================================================ */

.notes-container {
    display: flex;
    flex-direction: row;
    height: 100%;
    flex: 1;
    min-height: 0;
}

.notes-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 15px;
}

.notes-header h2 {
    margin: 0;
    color: var(--text-primary);
}

.notes-actions {
    display: flex;
}

.notes-list-panel {
    width: 300px;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    overflow: hidden;
    border-right: 1px solid var(--border-color);
}

.search-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
}

#searchNotes {
    margin-top: 10px;
}

.notes-list {
    background: var(--bg-secondary);
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.note-item {
    padding: 12px;
    margin-bottom: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.note-item:hover {
    background: var(--bg-hover);
    border-color: var(--accent-color);
}

.note-item.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.note-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    word-break: break-word;
    font-size: 14px;
}

.note-item.active .note-title {
    color: white;
}

.note-preview {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.note-item.active .note-preview {
    color: rgba(255,255,255,0.8);
}

.note-info {
    font-size: 11px;
    color: var(--text-tertiary);
}

.note-item.active .note-info {
    color: rgba(255,255,255,0.6);
}

.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
    padding: 20px;
}

.note-editor-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    overflow: hidden;
}

.no-selection {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    font-size: 16px;
}

.note-editor {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.editor-header {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
}

.editor-title-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
}

.note-filename-input {
    flex: 1;
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
}

.note-filename-input:focus {
    outline: none;
}

.editor-actions {
    display: flex;
    gap: 8px;
}

.note-content-textarea {
    flex: 1;
    padding: 15px;
    border: none;
    resize: none;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.note-content-textarea:focus {
    outline: none;
}

.editor-footer {
    padding: 10px 15px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-tertiary);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 8px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.modal-content h3 {
    margin: 0 0 20px 0;
    color: var(--text-primary);
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    margin-bottom: 20px;
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* Responsive */
@media (max-width: 768px) {
    .notes-container {
        flex-direction: column;
    }

    .notes-list-panel {
        width: 100%;
        min-height: 200px;
    }

    .editor-header {
        flex-direction: column;
        align-items: flex-start;
    }
}


/* ============================================================================
   Modals
   ============================================================================ */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 8px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
    color: var(--text-primary);
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    flex: 1;
}

.modal-body input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.95rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-sizing: border-box;
}

.modal-body input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

.modal-footer .btn {
    min-width: 100px;
}

/* ============================================================================
   Collapsible Sections
   ============================================================================ */

.collapsible-section {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.collapsible-section.collapsed {
    max-height: 40px;
}

.collapsible-section.collapsed .collapsible-content {
    display: none;
}

.collapsible-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s ease;
}

.collapsible-header:hover {
    background-color: var(--primary-light);
}

html[data-theme="dark"] .collapsible-header:hover {
    background-color: rgba(33, 150, 243, 0.1);
}

.collapsible-header label {
    margin: 0;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
}

.collapsible-toggle {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0 8px;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    margin-left: 0.5rem;
}

.collapsible-toggle:hover {
    color: var(--primary-color);
}

.collapsible-section.collapsed .collapsible-toggle .toggle-icon {
    transform: rotate(180deg);
}

.collapsible-content {
    padding: 0.5rem;
    transition: all 0.3s ease;
}

/* Sidebar collapsible styling */
#chatSidebar.collapsed {
    width: 50px !important;
    min-width: 50px;
}

#chatSidebar.collapsed .conversations-list,
#chatSidebar.collapsed .btn-primary {
    display: none;
}

#chatSidebar.collapsed .sidebar-header h2 {
    display: none;
}

#chatSidebar.collapsed .sidebar-title-bar {
    justify-content: center;
}

.sidebar-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}