/**
 * 논문 작성 도우미 - 채팅 UI 스타일
 * v0.7.0 - PDF Support + Center Dropzone
 */

/* ========== 레이아웃 ========== */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
    background: var(--bg-primary);
}

/* ========== 사이드바 ========== */
.sidebar {
    width: 300px;
    min-width: 300px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.sidebar-header h1 {
    font-size: 1.3rem;
    margin: 0 0 16px 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-header h1 .gradient-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Provider 선택 */
.sidebar-header .provider-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-header .provider-selector select {
    flex: 1;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
}

.sidebar-header .provider-selector select:hover {
    border-color: var(--accent-primary);
}

/* 사이드바 섹션 */
.sidebar-section {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-section h3 {
    font-size: 0.85rem;
    margin: 0 0 12px 0;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 드롭존 (사이드바) */
.dropzone-compact {
    padding: 16px;
    border: 2px dashed var(--border);
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
}

.dropzone-compact:hover {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
    color: var(--accent-primary);
}

.light-mode .dropzone-compact:hover {
    background: var(--overlay-accent);
}

.dropzone-compact.dragover {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
    box-shadow: var(--shadow-glow);
}

/* 파일 정보 */
.file-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border);
}

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

/* 차례(TOC) */
.toc-section {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.toc-list {
    flex: 1;
    overflow-y: auto;
    padding-right: 4px;
}

.toc-empty {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    text-align: center;
    padding: 30px 20px;
    line-height: 1.6;
}

.toc-item {
    padding: 12px 14px;
    cursor: pointer;
    border-radius: 8px;
    margin: 4px 0;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    border: 1px solid transparent;
}

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

.toc-item.active {
    background: var(--overlay-accent);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    font-weight: 500;
}

.light-mode .toc-item.active {
    background: var(--overlay-accent);
}

.toc-item .toc-num {
    font-weight: 600;
    min-width: 32px;
    color: var(--accent-primary);
}

.toc-item .toc-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.toc-item-all {
    border-top: 1px solid var(--border);
    margin-top: 8px;
    padding-top: 12px;
}

/* 빠른 액션 버튼 */
.quick-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.action-btn {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
    text-align: center;
    font-weight: 500;
}

.action-btn:hover:not(:disabled) {
    background: var(--accent-primary);
    color: var(--text-inverse);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.action-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 기존 기능 섹션 */
.legacy-section {
    border-bottom: none;
}

.legacy-section summary {
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    padding: 8px 0;
    transition: color var(--transition-fast);
}

.legacy-section summary:hover {
    color: var(--text-secondary);
}

.legacy-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
}

/* ========== 테마 토글 ========== */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.theme-toggle-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex: 1;
    justify-content: center;
}

.theme-toggle-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.theme-toggle-btn.active {
    background: var(--accent-primary);
    color: var(--text-inverse);
    border-color: var(--accent-primary);
}

/* ========== 메인 콘텐츠 ========== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-primary);
    position: relative;
}

/* 현재 섹션 표시 */
.current-section {
    padding: 12px 24px;
    background: var(--gradient-accent);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.current-section .section-label {
    font-size: 0.8rem;
    opacity: 0.9;
}

.current-section .section-name {
    flex: 1;
    font-weight: 600;
}

.current-section .btn-icon {
    color: var(--text-inverse);
    opacity: 0.8;
}

.current-section .btn-icon:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.2);
}

/* 채팅 메시지 영역 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 환영 메시지 */
.welcome-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.welcome-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 20px var(--accent-primary));
}

.welcome-message h2 {
    font-size: 1.8rem;
    margin: 0 0 12px 0;
    color: var(--text-primary);
}

.welcome-message>p {
    margin: 0 0 24px 0;
    font-size: 1.05rem;
}

/* ========== 논문 초안 작성 버튼 ========== */
.thesis-draft-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    margin: 0 auto 32px auto;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background: var(--gradient-accent);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-glow);
}

.thesis-draft-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-lg);
}

.thesis-draft-btn:active {
    transform: translateY(0);
}

/* ========== 중앙 드롭존 ========== */
.center-dropzone {
    max-width: 480px;
    margin: 0 auto 32px auto;
    padding: 48px 32px;
    border: 3px dashed var(--border);
    border-radius: 20px;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.center-dropzone:hover {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
    transform: translateY(-2px);
}

.light-mode .center-dropzone:hover {
    background: var(--overlay-accent);
}

.center-dropzone.dragover {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
    box-shadow: var(--shadow-glow);
    transform: scale(1.02);
}

.center-dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.center-dropzone-content i {
    font-size: 3.5rem;
    color: var(--accent-primary);
    filter: drop-shadow(0 0 10px var(--accent-primary));
}

.center-dropzone-content p {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0;
    font-weight: 500;
}

.center-dropzone-content .file-types {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    padding: 6px 16px;
    border-radius: 20px;
}

/* ========== 전체 화면 드래그 오버레이 ========== */
.drag-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
    transition: opacity 0.2s ease;
}

.drag-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.drag-overlay-content {
    text-align: center;
    color: var(--accent-primary);
    animation: pulse-glow 1.5s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        filter: drop-shadow(0 0 20px var(--accent-primary));
    }

    50% {
        filter: drop-shadow(0 0 40px var(--accent-primary));
    }
}

.drag-overlay-content i {
    font-size: 6rem;
    margin-bottom: 24px;
    display: block;
}

.drag-overlay-content p {
    font-size: 2rem;
    font-weight: 600;
    margin: 0 0 12px 0;
    color: var(--text-primary);
}

.drag-overlay-content span {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ========== 환영 팁 ========== */
.welcome-tips {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 320px;
    margin: 0 auto;
}

.welcome-tips .tip {
    padding: 14px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.welcome-tips .tip:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
}

/* 추천 액션 버튼 */
.suggested-actions {
    padding: 16px 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.suggested-btn {
    padding: 10px 18px;
    border: 1px solid var(--accent-primary);
    border-radius: 24px;
    background: transparent;
    color: var(--accent-primary);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.suggested-btn:hover {
    background: var(--accent-primary);
    color: var(--text-inverse);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

/* 입력 영역 */
.chat-input-container {
    padding: 20px 24px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.input-wrapper {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.input-wrapper textarea {
    flex: 1;
    padding: 14px 20px;
    border: 1px solid var(--border);
    border-radius: 24px;
    resize: none;
    font-size: 0.95rem;
    line-height: 1.5;
    max-height: 150px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.input-wrapper textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--overlay-accent);
}

.light-mode .input-wrapper textarea:focus {
    box-shadow: 0 0 0 3px var(--overlay-accent);
}

.send-btn {
    padding: 14px 28px;
    background: var(--gradient-accent);
    color: var(--text-inverse);
    border: none;
    border-radius: 24px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.send-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.input-hints {
    display: flex;
    gap: 10px;
    margin-top: 10px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    padding: 0 12px;
}

/* ========== 전체 텍스트 모달 ========== */
.full-text-modal {
    height: calc(100vh - 40px);
}

.modal-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.modal-toolbar input[type="text"] {
    flex: 1;
    min-width: 200px;
}

.modal-stats {
    flex: 1;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.keyboard-hint {
    background: rgba(0, 255, 0, 0.15);
    color: var(--accent-primary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

.light-mode .keyboard-hint {
    background: rgba(16, 185, 129, 0.15);
}

.page-nav-btn {
    background: var(--accent-primary) !important;
    color: var(--text-inverse) !important;
    border: none !important;
}

.page-nav-btn:hover:not(:disabled) {
    box-shadow: var(--shadow-glow);
}

.page-nav-btn:disabled {
    background: var(--border) !important;
    opacity: 0.5;
}

.page-info-inline {
    background: var(--bg-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.85rem;
    min-width: 80px;
    text-align: center;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.toolbar-divider {
    width: 1px;
    height: 28px;
    background: var(--border);
    margin: 0 8px;
}

.full-text-area {
    height: 100%;
    overflow-y: auto;
    padding: 24px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1rem;
    line-height: 1.9;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text-primary);
    background: var(--bg-primary);
}

.full-text-area .highlight {
    background: var(--warning);
    color: var(--text-inverse);
    padding: 2px 4px;
    border-radius: 3px;
}

.full-text-area .highlight.current {
    background: var(--accent-primary);
}

.full-text-area .line-number {
    color: var(--text-tertiary);
    user-select: none;
    margin-right: 16px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85em;
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

#pageInfo {
    background: var(--bg-tertiary);
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600;
    min-width: 100px;
    text-align: center;
    color: var(--text-primary);
}

.page-size-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: 24px;
}

.page-size-selector label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.page-size-selector select {
    padding: 8px 12px;
    width: auto;
    min-width: 100px;
}

/* ========== Legacy 모달 ========== */
.legacy-modal {
    max-width: 900px;
    max-height: 85vh;
}

.legacy-modal .modal-body {
    padding: 24px;
}

.legacy-modal .modal-body p {
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.legacy-modal .modal-body a {
    color: var(--accent-primary);
    font-weight: 500;
}

/* ========== 대화 기록 섹션 ========== */
.chat-history-section {
    max-height: 200px;
    display: flex;
    flex-direction: column;
}

.chat-history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.chat-history-header h3 {
    margin: 0;
}

.chat-history-actions {
    display: flex;
    gap: 4px;
}

.chat-history-actions .btn-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
}

.chat-history-actions .btn-icon:hover {
    background: var(--accent-primary);
    color: var(--text-inverse);
}

.chat-history-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-history-empty {
    color: var(--text-tertiary);
    font-size: 0.8rem;
    text-align: center;
    padding: 16px 8px;
}

.chat-history-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.chat-history-item.active {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
}

.light-mode .chat-history-item.active {
    background: var(--overlay-accent);
}

.chat-history-item-icon {
    color: var(--accent-primary);
    font-size: 0.85rem;
}

.chat-history-item-content {
    flex: 1;
    min-width: 0;
}

.chat-history-item-title {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-history-item-meta {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.chat-history-item-delete {
    opacity: 0;
    transition: opacity var(--transition-fast);
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
}

.chat-history-item:hover .chat-history-item-delete {
    opacity: 1;
}

.chat-history-item-delete:hover {
    color: var(--error);
    background: rgba(255, 68, 68, 0.1);
}

/* ========== 대화 저장 모달 ========== */
.save-chat-modal {
    max-width: 400px;
}

.save-chat-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.save-chat-form label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.save-chat-form input {
    padding: 12px 16px;
    font-size: 1rem;
}

.save-chat-hint {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin: 4px 0 0 0;
}

/* ========== 토스트 메시지 ========== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 14px 24px;
    border-radius: 12px;
    border: 1px solid var(--accent-primary);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    font-size: 0.95rem;
    font-weight: 500;
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toast i {
    color: var(--accent-primary);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* 토스트 타입별 색상 */
.toast.toast-success {
    border-color: var(--success);
}

.toast.toast-success i {
    color: var(--success);
}

.toast.toast-info {
    border-color: var(--info);
}

.toast.toast-info i {
    color: var(--info);
}

.toast.toast-warning {
    border-color: var(--warning);
}

.toast.toast-warning i {
    color: var(--warning);
}

.toast.toast-error {
    border-color: var(--error);
}

.toast.toast-error i {
    color: var(--error);
}

/* ========== 키보드 단축키 모달 ========== */
.shortcuts-modal {
    max-width: 500px;
}

.shortcuts-modal .modal-body {
    padding: 20px 24px;
}

.shortcuts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.shortcut-keys {
    display: flex;
    align-items: center;
    gap: 4px;
}

.shortcut-keys kbd {
    display: inline-block;
    padding: 4px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    box-shadow: 0 2px 0 var(--border);
}

.shortcut-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.shortcuts-hint {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    margin: 0;
}

.shortcuts-hint kbd {
    display: inline-block;
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.8rem;
    color: var(--accent-primary);
}

/* ========== 스트리밍 커서 ========== */
.message.assistant .message-content::after {
    content: '';
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background: var(--accent-primary);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 0.8s step-end infinite;
    opacity: 0;
}

.message.assistant.streaming .message-content::after {
    opacity: 1;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

/* ========== 내보내기 모달 ========== */
.export-modal {
    max-width: 480px;
}

.export-modal .modal-body {
    padding: 20px 24px;
}

.export-info {
    display: flex;
    gap: 16px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.export-info p {
    margin: 0;
}

.export-info strong {
    color: var(--accent-primary);
}

.export-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.export-option {
    cursor: pointer;
}

.export-option input[type="radio"] {
    display: none;
}

.export-option-content {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 10px;
    transition: all 0.2s ease;
}

.export-option input[type="radio"]:checked+.export-option-content {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
}

.light-mode .export-option input[type="radio"]:checked+.export-option-content {
    background: var(--overlay-accent);
}

.export-option-content i {
    font-size: 1.5rem;
    color: var(--text-tertiary);
    width: 32px;
    text-align: center;
}

.export-option input[type="radio"]:checked+.export-option-content i {
    color: var(--accent-primary);
}

.export-option-content div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.export-option-content strong {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.export-option-content span {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.export-filename {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.export-filename label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.export-filename input {
    padding: 12px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

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

.export-filename input::placeholder {
    color: var(--text-tertiary);
}

/* ========== 메시지 액션 버튼 ========== */
.message-actions {
    display: flex;
    gap: 4px;
    margin-top: 8px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.message:hover .message-actions {
    opacity: 1;
}

.msg-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.msg-action-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

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

.msg-action-btn i {
    font-size: 0.8rem;
}

/* 복사 버튼 클릭 피드백 */
.msg-action-btn.copied {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

/* 재생성 버튼 회전 애니메이션 */
.msg-action-btn[data-action="regenerate"].regenerating i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ========== 코드 블록 복사 버튼 ========== */
.code-block-wrapper {
    position: relative;
    margin: 12px 0;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
}

.code-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border);
}

.code-language {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.code-copy-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.code-copy-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

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

.code-copy-btn.copied {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.code-copy-btn i {
    font-size: 0.7rem;
}

.code-block-wrapper pre {
    margin: 0;
    padding: 12px 16px;
    overflow-x: auto;
    background: transparent !important;
    border-radius: 0;
}

.code-block-wrapper pre::before {
    display: none;
}

.code-block-wrapper code {
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, monospace;
    font-size: 0.85rem;
    line-height: 1.5;
}

/* 라이트 모드 */
.light-mode .code-block-header {
    background: rgba(0, 0, 0, 0.05);
}

.light-mode .code-copy-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* ========== 메시지 편집 기능 ========== */
.message.user .user-actions {
    display: flex;
    gap: 4px;
    margin-top: 8px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.message.user:hover .user-actions {
    opacity: 1;
}

.message.user.editing .user-actions {
    display: none;
}

.edit-message-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
}

.edit-message-input {
    width: 100%;
    min-height: 60px;
    max-height: 200px;
    padding: 12px 14px;
    background: var(--bg-primary);
    border: 2px solid var(--accent-primary);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    line-height: 1.5;
    resize: none;
    outline: none;
    transition: border-color 0.2s ease;
}

.edit-message-input:focus {
    border-color: var(--accent-secondary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.edit-message-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.edit-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
}

.edit-cancel-btn {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.edit-cancel-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.edit-save-btn {
    background: var(--accent-primary);
    color: white;
}

.edit-save-btn:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
}

.edit-warning {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
    padding: 8px 12px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 6px;
    color: #f59e0b;
    font-size: 0.8rem;
}

.edit-warning i {
    font-size: 0.85rem;
}

/* 라이트 모드 */
.light-mode .edit-message-input {
    background: var(--bg-secondary);
}

.light-mode .edit-warning {
    background: rgba(245, 158, 11, 0.15);
}

/* ========== 멀티 파일 리스트 ========== */
.file-count {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-tertiary);
    margin-left: 4px;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 10px;
    max-height: 180px;
    overflow-y: auto;
}

.file-list-empty {
    color: var(--text-tertiary);
    font-size: 0.8rem;
    text-align: center;
    padding: 12px;
}

.file-list-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.file-list-item.active {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
}

.file-list-item-icon {
    color: var(--accent-primary);
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.file-list-item-content {
    flex: 1;
    min-width: 0;
}

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

.file-list-item-meta {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.file-list-item-remove {
    opacity: 0;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.file-list-item:hover .file-list-item-remove {
    opacity: 1;
}

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

/* ========== 비교 모드 토글 스위치 ========== */
.compare-mode-switch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.compare-mode-switch input {
    display: none;
}

.switch-slider {
    position: relative;
    width: 36px;
    height: 20px;
    background: var(--border);
    border-radius: 20px;
    transition: all 0.3s ease;
}

.switch-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.compare-mode-switch input:checked+.switch-slider {
    background: var(--accent-primary);
}

.compare-mode-switch input:checked+.switch-slider::before {
    transform: translateX(16px);
}

.switch-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.compare-mode-switch:hover .switch-label {
    color: var(--text-primary);
}

.compare-mode-switch input:checked~.switch-label {
    color: var(--accent-primary);
    font-weight: 500;
}

/* ========== 비교 모드 응답 레이아웃 ========== */
.message.compare-response {
    max-width: 100%;
    background: transparent;
    padding: 0;
}

.compare-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    width: 100%;
}

.compare-column {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.compare-column-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 0.85rem;
}

.compare-column-header .provider-icon {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.compare-column-header .provider-icon.openai {
    background: linear-gradient(135deg, #10a37f 0%, #1a7f64 100%);
    color: white;
}

.compare-column-header .provider-icon.claude {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    color: white;
}

.compare-column-header .provider-name {
    flex: 1;
}

.compare-column-header .provider-model {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    font-weight: 400;
}

.compare-column-content {
    padding: 14px;
    flex: 1;
    min-height: 100px;
}

.compare-column-content .message-content {
    font-size: 0.9rem;
    line-height: 1.6;
}

.compare-column-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    border-top: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.compare-column-footer .message-actions {
    display: flex;
    gap: 4px;
    opacity: 1;
    margin: 0;
}

.compare-column-footer .response-time {
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

/* 스트리밍 상태 */
.compare-column.streaming .compare-column-content::after {
    content: '▋';
    animation: blink 1s infinite;
}

/* 비교 모드 활성 시 입력창 스타일 */
.chat-input-container.compare-active .input-wrapper {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--overlay-accent);
}

/* 반응형: 모바일에서 세로 스택 */
@media (max-width: 768px) {
    .compare-container {
        grid-template-columns: 1fr;
    }
}

/* ========== 반응형 ========== */
@media (max-width: 900px) {
    .sidebar {
        width: 260px;
        min-width: 260px;
    }

    .center-dropzone {
        padding: 36px 24px;
    }

    .center-dropzone-content i {
        font-size: 2.5rem;
    }
}

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

    .sidebar {
        width: 100%;
        min-width: 100%;
        max-height: 45vh;
    }

    .toc-section {
        max-height: 120px;
    }

    .message {
        max-width: 95%;
    }

    .modal-content {
        max-height: 95vh;
        border-radius: 12px;
    }

    .modal-header {
        flex-wrap: wrap;
    }

    .modal-toolbar {
        padding: 12px 16px;
    }

    .full-text-area {
        padding: 16px;
        font-size: 0.95rem;
    }

    .chat-input-container {
        padding: 16px;
    }

    .send-btn {
        padding: 12px 20px;
    }

    .center-dropzone {
        padding: 32px 20px;
        margin: 0 auto 24px auto;
    }

    .drag-overlay-content i {
        font-size: 4rem;
    }

    .drag-overlay-content p {
        font-size: 1.5rem;
    }
}

/* ========== 설정 토글 버튼 ========== */
.settings-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    margin-bottom: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.settings-toggle-btn:hover {
    background: var(--bg-secondary);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.settings-toggle-btn i {
    font-size: 1rem;
}

/* ========== 설정 패널 ========== */
.settings-panel {
    position: fixed;
    bottom: 80px;
    left: 16px;
    width: 280px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    overflow: hidden;
    animation: slideUp 0.2s ease-out;
}

.settings-panel.hidden {
    display: none;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.settings-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.settings-panel-header h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.settings-panel-header h3 i {
    color: var(--accent-primary);
}

.settings-panel-body {
    padding: 16px;
}

.settings-section {
    margin-bottom: 16px;
}

.settings-section:last-child {
    margin-bottom: 0;
}

.settings-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    font-weight: 500;
}

/* 프리셋 버튼 그룹 */
.preset-buttons {
    display: flex;
    gap: 8px;
}

.preset-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 8px;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preset-btn:hover {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.preset-btn.active {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
}

.preset-btn .preset-icon {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.preset-btn[data-preset="x1"] .preset-icon {
    font-size: 1rem;
}

.preset-btn[data-preset="x2"] .preset-icon {
    font-size: 1.3rem;
}

.preset-btn[data-preset="x3"] .preset-icon {
    font-size: 1.6rem;
}

.preset-btn .preset-name {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.preset-btn.active .preset-icon,
.preset-btn.active .preset-name {
    color: var(--accent-primary);
}

/* 줄 간격 버튼 (글자 크기와 동일 스타일 상속) */
.line-height-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 8px;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.line-height-btn:hover {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.line-height-btn.active {
    border-color: var(--accent-primary);
    background: var(--overlay-accent);
}

.line-height-btn .preset-icon {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.line-height-btn[data-line-height="compact"] .preset-icon {
    transform: scaleY(0.7);
}

.line-height-btn[data-line-height="relaxed"] .preset-icon {
    transform: scaleY(1.3);
}

.line-height-btn .preset-name {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.line-height-btn.active .preset-icon,
.line-height-btn.active .preset-name {
    color: var(--accent-primary);
}

/* ========== 채팅 상단 툴바 ========== */
.chat-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 20px;
    min-height: 44px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.chat-toolbar .current-section {
    position: static;
    margin: 0;
    padding: 6px 12px;
}

.chat-search-toggle {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: auto;
}

.chat-search-toggle:hover {
    background: var(--bg-primary);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.chat-search-toggle.active {
    background: var(--overlay-accent);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* ========== 검색바 ========== */
.chat-search-bar {
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    animation: slideDown 0.2s ease-out;
}

.chat-search-bar.hidden {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

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

.search-input-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    transition: border-color var(--transition-fast);
}

.search-input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--overlay-accent);
}

.search-input-wrapper .search-icon {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.search-input-wrapper input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    min-width: 0;
}

.search-input-wrapper input::placeholder {
    color: var(--text-tertiary);
}

.search-result-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    padding: 2px 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.search-result-count:empty {
    display: none;
}

.search-result-count.no-results {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

.search-nav-buttons {
    display: flex;
    gap: 4px;
}

.search-nav-buttons .btn-icon {
    width: 28px;
    height: 28px;
    padding: 0;
    font-size: 0.75rem;
}

/* ========== 검색 결과 하이라이트 ========== */
.message.search-match {
    background: var(--overlay-accent);
    border-left: 3px solid var(--accent-primary);
}

.message.search-current {
    background: rgba(16, 185, 129, 0.2);
    border-left: 3px solid var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-primary);
}

.message .search-highlight {
    background: rgba(250, 204, 21, 0.4);
    color: inherit;
    padding: 1px 2px;
    border-radius: 2px;
}

.message.search-current .search-highlight {
    background: rgba(250, 204, 21, 0.6);
}

/* 검색 중 매칭되지 않은 메시지 희미하게 */
.chat-messages.searching .message:not(.search-match) {
    opacity: 0.4;
}

.chat-messages.searching .message.search-match {
    opacity: 1;
}

/* 체크박스 스타일 */
.settings-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.settings-checkbox:hover {
    color: var(--text-primary);
}

/* 설정 패널 반응형 */
@media (max-width: 768px) {
    .settings-panel {
        left: 50%;
        transform: translateX(-50%);
        bottom: 100px;
        width: calc(100% - 32px);
        max-width: 320px;
    }
}

/* ========== 통계 토글 버튼 ========== */
.stats-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    margin-bottom: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.stats-toggle-btn:hover {
    background: var(--bg-secondary);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.stats-toggle-btn i {
    font-size: 1rem;
}

/* ========== 통계 패널 ========== */
.stats-panel {
    position: fixed;
    bottom: 80px;
    left: 16px;
    width: 300px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    overflow: hidden;
    animation: slideUp 0.2s ease-out;
}

.stats-panel.hidden {
    display: none;
}

.stats-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.stats-panel-header h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.stats-panel-header h3 i {
    color: var(--accent-primary);
}

.stats-panel-body {
    padding: 16px;
}

/* 통계 그리드 */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.stat-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--overlay-accent);
    border-radius: 8px;
    color: var(--accent-primary);
    font-size: 1rem;
}

.stat-icon.user {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

.stat-icon.ai {
    background: rgba(168, 85, 247, 0.15);
    color: #a855f7;
}

.stat-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* 구분선 */
.stats-divider {
    height: 1px;
    background: var(--border);
    margin: 16px 0;
}

/* 상세 통계 */
.stats-detail {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.stat-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-primary);
    border-radius: 6px;
}

.stat-row-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.stat-row-label i {
    width: 16px;
    color: var(--text-tertiary);
}

.stat-row-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* 푸터 */
.stats-footer {
    margin-top: 12px;
    text-align: center;
}

.stats-note {
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

/* 통계 패널 반응형 */
@media (max-width: 768px) {
    .stats-panel {
        left: 50%;
        transform: translateX(-50%);
        bottom: 100px;
        width: calc(100% - 32px);
        max-width: 340px;
    }
}

/* 추가 메시지 액션 스타일 (기본 정의는 1219-1275 라인) */
.msg-action-btn.active {
    color: var(--accent-primary);
}

.msg-action-btn.bookmark-btn.active {
    color: #f59e0b;
}

/* 북마크된 메시지 */
.message.bookmarked {
    border-left: 3px solid #f59e0b;
}

/* 하이라이트 플래시 */
.message.highlight-flash {
    animation: highlightFlash 1.5s ease-out;
}

@keyframes highlightFlash {

    0%,
    100% {
        background: transparent;
    }

    25% {
        background: var(--overlay-accent);
    }
}

/* ========== 북마크 토글 버튼 ========== */
.bookmark-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    margin-bottom: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.bookmark-toggle-btn:hover {
    background: var(--bg-secondary);
    color: #f59e0b;
    border-color: #f59e0b;
}

.bookmark-toggle-btn i {
    font-size: 1rem;
}

.bookmark-count {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f59e0b;
    color: #000;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 9px;
    padding: 0 5px;
}

.bookmark-count.hidden {
    display: none;
}

/* ========== 북마크 패널 ========== */
.bookmark-panel {
    position: fixed;
    bottom: 80px;
    left: 16px;
    width: 320px;
    max-height: 450px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.2s ease-out;
}

.bookmark-panel.hidden {
    display: none;
}

.bookmark-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.bookmark-panel-header h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.bookmark-panel-header h3 i {
    color: #f59e0b;
}

.bookmark-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.bookmark-panel-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    background: var(--bg-tertiary);
}

/* 북마크 리스트 */
.bookmark-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 북마크 그룹 (대화별) */
.bookmark-group {
    background: var(--bg-primary);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.bookmark-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    cursor: default;
}

.bookmark-group-header.current {
    background: rgba(245, 158, 11, 0.1);
    border-bottom-color: rgba(245, 158, 11, 0.3);
}

.bookmark-group-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.bookmark-group-header.current .bookmark-group-title {
    color: #f59e0b;
}

.bookmark-group-title i {
    font-size: 0.85rem;
}

.bookmark-group-count {
    font-size: 0.7rem;
    background: var(--bg-secondary);
    color: var(--text-tertiary);
    padding: 2px 8px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.bookmark-group-header.current .bookmark-group-count {
    background: #f59e0b;
    color: white;
}

.bookmark-group-items {
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.bookmark-empty {
    text-align: center;
    color: var(--text-tertiary);
    padding: 24px;
    font-size: 0.9rem;
}

.bookmark-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.bookmark-item:hover {
    border-color: #f59e0b;
    background: var(--bg-tertiary);
}

.bookmark-item-content {
    flex: 1;
    min-width: 0;
}

.bookmark-item-preview {
    font-size: 0.85rem;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.bookmark-item-date {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.bookmark-item-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.bookmark-item-actions .btn-icon {
    width: 26px;
    height: 26px;
    font-size: 0.75rem;
}

/* ========== 액션 토스트 ========== */
.action-toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    font-size: 0.9rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 2000;
}

.action-toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* 북마크 패널 반응형 */
@media (max-width: 768px) {
    .bookmark-panel {
        left: 50%;
        transform: translateX(-50%);
        bottom: 100px;
        width: calc(100% - 32px);
        max-width: 360px;
    }

    .message-actions {
        opacity: 1;
    }
}