/* css/mobile.css (Updated for seamless background and no borders) */

/* --- Base Layout --- */
body,
html {
    overflow: hidden;
    height: 100%;
    background-color: var(--bg-color);
    font-family: var(--font-sans);
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    overflow: hidden;
}

/* --- Top Bar (Fixed Header) --- */
.top-bar {
    flex-shrink: 0;
    height: 60px;
    width: 100%;
    background-color: var(--elevated-bg);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.75rem;
    border-bottom: none;
}

.top-bar-action {
    position: relative;
    display: flex;
    align-items: center;
}

.top-bar-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s ease, color 0.2s ease;
    position: relative;
    overflow: hidden;
}

.top-bar-btn:hover {
    background-color: var(--hover-bg);
    color: var(--text-color);
}

/* Profile Photo Styling */
.profile-photo {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-color);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.profile-photo.hidden {
    display: none;
}

/* Hide default icon when photo is shown */
.profile-btn:has(.profile-photo:not(.hidden)) #profile-icon-default {
    display: none;
}

.top-bar-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    display: flex;
    flex-direction: column;
    min-width: 160px;
    padding: 0.5rem 0;
    border-radius: 12px;
    background: var(--window-bg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    z-index: 1500;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.6rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 0.95rem;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.dropdown-item i {
    font-size: 0.95rem;
    color: #ffffff;
}

/* Light mode - dark icons */
body:not(.dark-mode) .dropdown-item i {
    color: #1a1a1a;
}

.dropdown-item:hover,
.dropdown-item:focus-visible {
    background: var(--hover-bg);
    color: var(--text-color);
}

/* --- Sidebar Removed - Now Using Profile Dropdown --- */
/* Legacy sidebar elements hidden */
#sidebar-container,
#sidebar-overlay {
    display: none;
}

/* --- Main Content (The Scrollable Area) --- */
.main-content {
    flex: 1;
    overflow-y: auto;
    background-color: var(--elevated-bg);
}

/* --- Chat Messages Container --- */
.chat-messages {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 1rem 1rem;
    gap: 1rem;
    align-items: flex-start;
}

/* --- Bottom UI Area (Fixed Footer) --- */
#bottom-ui-container {
    flex-shrink: 0;
    width: 100%;
    z-index: 100;
    background-color: var(--elevated-bg);
    border-top: none;
    /* THIS IS THE CRITICAL ANCHOR FOR THE POPUP MENU */
    position: relative;
}

/* --- Floating Input --- */
.floating-input-wrapper {
    padding: 0.75rem;
    padding-bottom: calc(2.5rem + env(safe-area-inset-bottom));
    transition: padding 0.3s ease;
}

.floating-input-container {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

/* Override desktop positioning - keep input container in place for mobile */
.floating-input-container.welcome-mode,
.floating-input-container.chat-mode,
.floating-input-container.centered {
    position: relative !important;
    bottom: auto !important;
    left: auto !important;
    transform: none !important;
    width: 100% !important;
    max-width: none !important;
}

.input-action-menu {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 0;
    min-width: 170px;
    padding: 6px;
    border-radius: 12px;
    background: var(--window-bg);
    border: 1px solid rgba(26, 26, 26, 0.08);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    z-index: 9999;
    display: flex;
    flex-direction: column;
}

.dark-mode .input-action-menu {
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.input-action-menu::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 18px;
    width: 10px;
    height: 10px;
    background: var(--window-bg);
    border-right: 1px solid rgba(26, 26, 26, 0.08);
    border-bottom: 1px solid rgba(26, 26, 26, 0.08);
    transform: rotate(45deg);
}

.dark-mode .input-action-menu::before {
    border-right-color: rgba(255, 255, 255, 0.08);
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.floating-input-container .input-action-menu.hidden {
    display: none;
}

.input-action-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: none;
    background: transparent;
    color: var(--text-color);
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.15s ease;
    border-radius: 8px;
    -webkit-tap-highlight-color: transparent;
}

.input-action-menu-item i {
    font-size: 0.9rem;
    width: 16px;
    text-align: center;
    color: var(--text-secondary);
}

.input-action-menu-item:active {
    background: rgba(26, 26, 26, 0.06);
}

.dark-mode .input-action-menu-item:active {
    background: rgba(255, 255, 255, 0.06);
}

.input-action-menu-item.active {
    background: rgba(26, 26, 26, 0.05);
}

.dark-mode .input-action-menu-item.active {
    background: rgba(255, 255, 255, 0.05);
}

.input-action-menu-item.active i {
    color: #1a1a1a;
}

.dark-mode .input-action-menu-item.active i {
    color: #ffffff;
}

.floating-input {
    width: 100%;
    min-height: 52px;
    max-height: 200px;
    border-radius: 1.75rem;
    background-color: var(--elevated-bg);
    border: 1px solid var(--border-color);
    padding: 0.75rem 100px 0.75rem 55px;
    font-size: 1rem;
    color: var(--text-color);
    resize: none;
    line-height: 1.5;
}

/* --- Input Action Buttons --- */
.input-action-btn.circular-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    cursor: pointer;
}

#attach-file-btn {
    left: 6px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

#voice-input-btn {
    right: 52px;
    background-color: transparent;
    border: none;
    color: var(--text-secondary);
}

#send-message {
    right: 6px;
    background: #ffffff;
    color: #1a1a1a;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

#send-message:hover {
    background: #f5f5f5;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

#send-message:active {
    background: #e8e8e8;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* Light mode - dark button with white icon */
body:not(.dark-mode) #send-message {
    background: #1a1a1a;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

body:not(.dark-mode) #send-message:hover {
    background: #2e2e2e;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

body:not(.dark-mode) #send-message:active {
    background: #3a3a3a;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* --- File Previews --- */
#file-previews-container {
    display: flex;
    flex-direction: row;
    gap: 12px;
    padding: 4px;
    max-height: 160px;
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    flex-wrap: nowrap;
}

#file-previews-container::-webkit-scrollbar {
    display: none;
}

.file-preview-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 8px;
    background-color: var(--elevated-bg);
    padding: 8px 12px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    animation: fadeIn 0.3s ease;
}

.file-preview-item .file-name {
    flex-grow: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-secondary);
}

.file-preview-item .file-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.file-preview-item .preview-file-btn,
.file-preview-item .remove-file-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    padding: 4px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.file-preview-item .preview-file-btn:hover {
    background-color: var(--hover-bg);
    color: var(--accent-color);
}

.file-preview-item .remove-file-btn {
    font-size: 1.5rem;
}

.file-preview-item .remove-file-btn:hover {
    background-color: var(--hover-bg);
    color: var(--error-500);
}

.file-preview-item .file-status {
    width: 20px;
    text-align: center;
}

.file-preview-item .file-status .success-icon {
    color: var(--success-500);
}

.file-preview-item .file-status .error-icon {
    color: var(--error-500);
}

/* --- File Preview Modal --- */
#file-preview-modal,
#context-viewer-preview-modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

#file-preview-modal:not(.hidden),
#context-viewer-preview-modal:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.preview-modal-content {
    position: relative;
    background-color: var(--elevated-bg);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    padding: 1rem;
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
}

.close-preview-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background-color: rgba(26, 26, 26, 0.8);
    color: white;
    font-size: 1.2rem;
    font-weight: normal;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 10;
}

.dark-mode .close-preview-btn {
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
}

.close-preview-btn:active {
    transform: scale(0.9);
    background-color: rgba(26, 26, 26, 0.9);
}

.dark-mode .close-preview-btn:active {
    background-color: rgba(255, 255, 255, 0.25);
}

#preview-content-area,
#context-viewer-preview-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    max-height: 90vh;
    overflow: auto;
}

#preview-content-area .preview-header,
#context-viewer-preview-area .preview-header {
    width: 100%;
    padding: 0.5rem 0;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid rgba(26, 26, 26, 0.08);
}

.dark-mode #preview-content-area .preview-header,
.dark-mode #context-viewer-preview-area .preview-header {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

#preview-content-area .preview-title,
#context-viewer-preview-area .preview-title {
    margin: 0;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-color);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#preview-content-area img,
#preview-content-area video,
#context-viewer-preview-area img,
#context-viewer-preview-area video {
    max-width: 85vw;
    max-height: 80vh;
    border-radius: 8px;
    object-fit: contain;
}

#preview-content-area audio,
#context-viewer-preview-area audio {
    width: 100%;
    min-width: 300px;
}

#preview-content-area .pdf-preview,
#context-viewer-preview-area .pdf-preview {
    width: 85vw;
    height: 80vh;
    border: none;
    border-radius: 8px;
}

/* Text File Preview */
.text-file-preview {
    width: 85vw;
    max-width: 800px;
    max-height: 80vh;
    overflow: auto;
    background: rgba(26, 26, 26, 0.03);
    border: 1px solid rgba(26, 26, 26, 0.08);
    border-radius: 8px;
    padding: 16px;
}

.dark-mode .text-file-preview {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
}

.text-file-preview pre {
    margin: 0;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.text-file-preview code {
    color: var(--text-color);
    background: transparent;
    padding: 0;
}

/* Markdown File Preview */
.markdown-file-preview {
    width: 85vw;
    max-width: 800px;
    max-height: 80vh;
    overflow: auto;
    background: rgba(26, 26, 26, 0.03);
    border: 1px solid rgba(26, 26, 26, 0.08);
    border-radius: 8px;
    padding: 20px;
}

.dark-mode .markdown-file-preview {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
}

.markdown-file-preview h1,
.markdown-file-preview h2,
.markdown-file-preview h3 {
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    font-weight: 600;
}

.markdown-file-preview h1 {
    font-size: 1.5rem;
}

.markdown-file-preview h2 {
    font-size: 1.25rem;
}

.markdown-file-preview h3 {
    font-size: 1.1rem;
}

.markdown-file-preview p {
    margin: 0.75em 0;
    line-height: 1.6;
}

.markdown-file-preview code {
    background: rgba(26, 26, 26, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.9em;
}

.dark-mode .markdown-file-preview code {
    background: rgba(255, 255, 255, 0.08);
}

.markdown-file-preview pre {
    background: rgba(26, 26, 26, 0.08);
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 1em 0;
}

.dark-mode .markdown-file-preview pre {
    background: rgba(255, 255, 255, 0.08);
}

.markdown-file-preview pre code {
    background: transparent;
    padding: 0;
}

/* CSV File Preview */
.csv-file-preview {
    width: 85vw;
    max-width: 1000px;
    max-height: 80vh;
    overflow: auto;
    background: rgba(26, 26, 26, 0.03);
    border: 1px solid rgba(26, 26, 26, 0.08);
    border-radius: 8px;
    padding: 16px;
}

.dark-mode .csv-file-preview {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
}

.csv-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.csv-table th,
.csv-table td {
    padding: 8px 12px;
    text-align: left;
    border: 1px solid rgba(26, 26, 26, 0.08);
}

.dark-mode .csv-table th,
.dark-mode .csv-table td {
    border-color: rgba(255, 255, 255, 0.08);
}

.csv-table th {
    background: rgba(26, 26, 26, 0.05);
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 1;
}

.dark-mode .csv-table th {
    background: rgba(255, 255, 255, 0.05);
}

.csv-table tr:hover {
    background: rgba(26, 26, 26, 0.02);
}

.dark-mode .csv-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.csv-note {
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Preview Unavailable Message */
.preview-unavailable {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 40px;
    text-align: center;
    min-height: 300px;
}

.preview-unavailable i {
    font-size: 3rem;
    color: var(--text-secondary);
    opacity: 0.5;
    margin-bottom: 20px;
}

.preview-unavailable h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 12px 0;
}

.preview-unavailable p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 6px 0;
}

.preview-unavailable .preview-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.7;
    margin-top: 12px;
}

/* --- Context Viewer Modal (Redesigned) --- */
#context-viewer-modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2500;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

#context-viewer-modal:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.context-viewer-panel {
    width: 100%;
    max-height: 90vh !important;
    background: var(--elevated-bg);
    border-radius: 20px 20px 0 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.15);
    /* Respect bottom safe area */
    padding-bottom: env(safe-area-inset-bottom) !important;
}

#context-viewer-modal:not(.hidden) .context-viewer-panel {
    transform: translateY(0);
}

.context-viewer-header {
    padding: 16px 20px 12px;
    /* Extra padding for top inset if the panel is near the top */
    padding-top: calc(16px + env(safe-area-inset-top, 0px));
    border-bottom: 1px solid rgba(26, 26, 26, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.dark-mode .context-viewer-header {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.context-viewer-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
    letter-spacing: -0.01em;
}

.close-viewer-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: all 0.2s ease;
    font-size: 1.1rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-viewer-btn:hover,
.close-viewer-btn:active {
    background: rgba(26, 26, 26, 0.06);
    color: var(--text-color);
}

.dark-mode .close-viewer-btn:hover,
.dark-mode .close-viewer-btn:active {
    background: rgba(255, 255, 255, 0.08);
}

.context-viewer-tabs {
    display: flex;
    border-bottom: 1px solid rgba(26, 26, 26, 0.08);
    background-color: transparent;
    padding: 0 20px;
    gap: 24px;
    flex-shrink: 0;
}

.dark-mode .context-viewer-tabs {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.viewer-tab {
    flex: 0;
    padding: 12px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent !important;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s ease, font-weight 0.2s ease;
    font-size: 0.85rem;
    font-weight: 400;
    position: relative;
    border-bottom: 2px solid transparent;
}

.viewer-tab:hover {
    color: var(--text-color);
    background: transparent !important;
}

.viewer-tab:active {
    background: transparent !important;
}

.viewer-tab.active {
    color: var(--text-color);
    font-weight: 600;
    border-bottom-color: transparent;
    background: transparent !important;
}

.viewer-tab i {
    display: none;
}

.context-viewer-content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.viewer-tab-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    display: none;
    -webkit-overflow-scrolling: touch;
}

.viewer-tab-content.active {
    display: block;
}

/* Empty State */
.viewer-tab-content .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 20px;
    text-align: center;
    color: var(--text-secondary);
}

.viewer-tab-content .empty-state i {
    font-size: 2rem;
    margin-bottom: 12px;
    opacity: 0.4;
}

.viewer-tab-content .empty-state p {
    font-size: 0.9rem;
    line-height: 1.4;
    margin: 0;
}

/* File Items */
.viewer-file-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(26, 26, 26, 0.03);
    border: 1px solid rgba(26, 26, 26, 0.06);
    border-radius: 12px;
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.dark-mode .viewer-file-item {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.06);
}

.viewer-file-item:active {
    transform: scale(0.98);
    background: rgba(26, 26, 26, 0.05);
}

.dark-mode .viewer-file-item:active {
    background: rgba(255, 255, 255, 0.05);
}

.viewer-file-item>i {
    font-size: 1.1rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.viewer-file-item .item-name {
    flex: 1;
    font-size: 0.85rem;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
}

.viewer-file-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.preview-context-file-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-context-file-btn:active {
    background: rgba(26, 26, 26, 0.08);
    color: var(--text-color);
    transform: scale(0.95);
}

.dark-mode .preview-context-file-btn:active {
    background: rgba(255, 255, 255, 0.08);
}

/* Session Chips */
.viewer-session-chip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    background: rgba(26, 26, 26, 0.03);
    border: 1px solid rgba(26, 26, 26, 0.06);
    border-radius: 12px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.dark-mode .viewer-session-chip {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.06);
}

.viewer-session-chip:hover {
    background: rgba(26, 26, 26, 0.05);
    border-color: rgba(26, 26, 26, 0.1);
}

.dark-mode .viewer-session-chip:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
}

.viewer-session-chip:active {
    transform: scale(0.98);
}

.viewer-session-chip-title {
    flex: 1;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.viewer-session-chip-icon {
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

/* Expanded Session View */
.viewer-session-expanded {
    padding: 16px;
    background: rgba(26, 26, 26, 0.03);
    border: 1px solid rgba(26, 26, 26, 0.06);
    border-radius: 12px;
    margin-bottom: 12px;
}

.dark-mode .viewer-session-expanded {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.06);
}

.viewer-session-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(26, 26, 26, 0.06);
}

.dark-mode .viewer-session-header {
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

.viewer-session-back-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.viewer-session-back-btn:active {
    background: rgba(26, 26, 26, 0.08);
}

.dark-mode .viewer-session-back-btn:active {
    background: rgba(255, 255, 255, 0.08);
}

.viewer-session-header-title {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.viewer-session-conversation {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.viewer-session-turn {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.viewer-session-role {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.viewer-session-content {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-color);
    word-wrap: break-word;
    white-space: pre-wrap;
}

.viewer-session-content p {
    margin: 0 0 8px 0;
}

.viewer-session-content p:last-child {
    margin-bottom: 0;
}

/* User Message Context Button */
.user-message-context-button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(26, 26, 26, 0.04);
    border: 1px solid rgba(26, 26, 26, 0.08);
    border-radius: 16px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s ease;
    margin-top: 6px;
}

.dark-mode .user-message-context-button {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

.user-message-context-button:hover {
    color: #f59e0b;
}

.dark-mode .user-message-context-button:hover {
    color: #fbbf24;
}

.user-message-context-button:active {
    transform: scale(0.96);
    color: #f59e0b;
}

.dark-mode .user-message-context-button:active {
    color: #fbbf24;
}

.user-message-context-button i {
    font-size: 0.7rem;
    transition: color 0.2s ease;
}

/* Message Wrapper Styling */
.user-message-wrapper {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

/* --- Animations --- */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

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