:root {
    --primary-color: #1d4f91;
    --primary-light: #dbeafe;
    --secondary-color: #e0f2fe;
    --accent-color: #dcfce7;
    --bg-color: #eef2f7;
    --text-color: #172033;
    --text-light: #64748b;
    --white: #ffffff;
    --sidebar-bg: #101827;
    --bot-msg-bg: #ffffff;
    --user-msg-bg: #1d4f91;
    --shadow: 0 18px 48px rgba(15, 23, 42, 0.12);
    --border-radius: 8px;
    --transition: all 0.18s ease;
}

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

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: none;
    overflow: hidden;
}

.app-wrapper {
    width: 95vw;
    height: 90vh;
    max-width: 1200px;
    background-color: var(--white);
    border-radius: 30px;
    box-shadow: var(--shadow);
    display: flex;
    overflow: hidden;
    border: 4px solid var(--white);
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
    padding: 10px;
}

.logo-icon {
    font-size: 2rem;
    background: var(--white);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    animation: none;
}

.sidebar-header h2 {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    border: none;
    background: transparent;
    color: var(--text-color);
    font-size: 1rem;
    border-radius: 15px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.6);
    transform: translateX(5px);
}

.nav-btn.active {
    background-color: var(--white);
    color: var(--primary-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
}

.nav-btn i {
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.danger-btn {
    width: 100%;
    padding: 12px;
    border: none;
    background-color: #ffe5e5;
    color: #ff6b6b;
    border-radius: 15px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.danger-btn:hover {
    background-color: #ffcccc;
}

.logout-btn {
    margin-top: 10px;
}

.user-badge {
    margin-top: 12px;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 12px;
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
    color: var(--text-color);
    font-weight: 600;
}

.user-badge small {
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    margin-top: 2px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    position: relative;
}

.auth-panel {
    margin: auto;
    width: min(440px, 88%);
    background: var(--white);
    border-radius: 24px;
    padding: 28px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.auth-panel h2 {
    color: var(--primary-color);
    margin-bottom: 8px;
}

.auth-panel p {
    color: var(--text-light);
    font-size: 0.92rem;
    margin-bottom: 16px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.auth-form input,
.auth-form select {
    width: 100%;
    border: 1px solid #e6e6e6;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 0.95rem;
    outline: none;
}

.auth-form input:focus,
.auth-form select:focus {
    border-color: var(--primary-light);
}

.auth-submit {
    border-radius: 12px !important;
    width: 100% !important;
    height: 44px !important;
}

.auth-switch {
    border: none;
    background: none;
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 700;
    padding-top: 4px;
}

.chat-header {
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #f0f0f0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 10;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--primary-color);
}

.status-dot {
    width: 10px;
    height: 10px;
    background-color: #90ee90;
    border-radius: 50%;
    box-shadow: 0 0 5px #90ee90;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.icon-btn:hover {
    background-color: #f5f5f5;
    color: var(--text-color);
}

/* Chat Area */
.chat-container {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    scroll-behavior: smooth;
}

.welcome-screen {
    text-align: center;
    margin: auto;
    color: var(--text-light);
    animation: fadeIn 1s ease;
}

.big-avatar {
    font-size: 5rem;
    margin-bottom: 20px;
    animation: none;
}

.welcome-screen h3 {
    color: var(--text-color);
    margin-bottom: 10px;
}

.message {
    max-width: 80%;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease;
}

.bot-message {
    align-self: flex-start;
}

.user-message {
    align-self: flex-end;
}

.message-content {
    padding: 15px 20px;
    border-radius: 20px;
    font-size: 0.95rem;
    line-height: 1.6;
    position: relative;
    word-wrap: break-word;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.02);
}

.message-meta {
    margin-top: 8px;
    padding: 8px 12px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.03);
    font-size: 0.85rem;
    color: var(--text-color);
}

.reasoning-details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--primary-color);
    list-style: none;
}

.reasoning-details summary::-webkit-details-marker {
    display: none;
}

.reasoning-details summary::before {
    content: '▶';
    display: inline-block;
    margin-right: 6px;
    transition: transform 0.2s ease;
}

.reasoning-details[open] summary::before {
    transform: rotate(90deg);
}

.reasoning-content {
    margin-top: 6px;
    color: var(--text-color);
}

.trace-line {
    margin-bottom: 6px;
    line-height: 1.5;
}

.trace-funnel {
    color: var(--text-light, #64748b);
    font-size: 0.92em;
}

/* 复杂度路由样式 */
.trace-complexity {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.tag-simple,
.tag-complex {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
}

.tag-simple {
    background-color: #d3f9d8;
    color: #2b8a3e;
}

.tag-complex {
    background-color: #ffe3e3;
    color: #c92a2a;
}

.trace-detail {
    color: var(--text-light);
    font-size: 0.85rem;
}

.trace-sub-questions {
    margin-top: 4px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

.trace-sub-qs-header {
    font-weight: 600;
    font-size: 0.88rem;
    margin-bottom: 6px;
    color: var(--text-color);
}

.trace-sub-qs-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.trace-sub-q-item {
    font-size: 0.85rem;
    color: var(--text-color);
    line-height: 1.5;
}

.trace-sub-q-index {
    font-weight: 700;
    color: var(--primary-color);
    margin-right: 4px;
}

/* 子 Agent 检索详情 */
.trace-sub-traces {
    margin-top: 8px;
}

.sub-traces-details {
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 8px;
    overflow: hidden;
}

.sub-traces-title {
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--primary-color);
    padding: 6px 10px;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.5);
}

.sub-traces-title::-webkit-details-marker {
    display: none;
}

.sub-traces-title::before {
    content: '▶';
    display: inline-block;
    margin-right: 4px;
    transition: transform 0.2s ease;
    font-size: 0.7rem;
}

.sub-traces-details[open] .sub-traces-title::before {
    transform: rotate(90deg);
}

.sub-trace-block {
    padding: 8px 10px;
    border-top: 1px solid rgba(0, 0, 0, 0.04);
}

.sub-trace-block:last-child {
    border-bottom: none;
}

.sub-trace-header {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-color);
    margin-bottom: 4px;
    padding-bottom: 4px;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.06);
}

.sub-trace-chunks {
    font-size: 0.82rem;
    color: var(--text-light);
    margin-top: 2px;
}

.sources {
    margin-top: 10px;
}

.sources-title {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 6px;
}

.sources-list {
    list-style: none;
    padding-left: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.source-item {
    background: rgba(255, 255, 255, 0.6);
    padding: 6px 8px;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.source-title-line {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-weight: 600;
}

.source-file {
    color: var(--primary-color);
}

.source-page {
    color: var(--text-light);
}

.source-meta-line {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 2px;
    font-size: 0.78rem;
}

.source-excerpt {
    margin-top: 4px;
    color: var(--text-color);
    font-size: 0.82rem;
}

.bot-message .message-content {
    background-color: var(--bot-msg-bg);
    color: #444;
    border-bottom-left-radius: 5px;
}

.user-message .message-content {
    background-color: var(--user-msg-bg);
    color: var(--white);
    border-bottom-right-radius: 5px;
}

/* Markdown Styles */
.message-content pre {
    background-color: #f8f8f8;
    border-radius: 10px;
    padding: 10px;
    margin: 10px 0;
    overflow-x: auto;
    border: 1px solid #eee;
}

.message-content code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
}

.message-content p {
    margin-bottom: 10px;
}

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

.message-content ul,
.message-content ol {
    margin-left: 20px;
    margin-bottom: 10px;
}

/* HITL Panel */
.hitl-panel {
    margin-bottom: 12px;
    padding: 12px 14px;
    border: 1px solid #f5c16c;
    border-left-width: 4px;
    border-radius: 8px;
    background: #fffaf0;
    color: var(--text-color);
}

.hitl-panel-header {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    color: #9a5b00;
    font-weight: 700;
    font-size: 0.9rem;
}

.hitl-panel-prompt {
    line-height: 1.6;
    overflow-wrap: anywhere;
}

.hitl-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.hitl-option {
    border: 1px solid #e0b15f;
    background: #ffffff;
    color: #6c4800;
    border-radius: 999px;
    padding: 6px 12px;
    font: inherit;
    font-size: 0.86rem;
    cursor: pointer;
    transition: var(--transition);
    max-width: 100%;
    overflow-wrap: anywhere;
}

.hitl-option:hover {
    border-color: #bd7d00;
    background: #fff3cf;
}

.hitl-resume-note {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: fit-content;
    max-width: 100%;
    margin-bottom: 6px;
    padding: 4px 9px;
    border-radius: 999px;
    background: #fffaf0;
    color: #8a5a00;
    border: 1px solid #f5d79a;
    font-size: 0.78rem;
    line-height: 1.4;
    overflow-wrap: anywhere;
}

/* Input Area */
.input-area-wrapper {
    padding: 20px 30px;
    background-color: var(--white);
    border-top: 1px solid #f0f0f0;
}

.input-area {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    background-color: #f9f9f9;
    padding: 10px;
    border-radius: 25px;
    border: 2px solid transparent;
    transition: var(--transition);
}

.input-area:focus-within {
    border-color: var(--primary-light);
    background-color: var(--white);
    box-shadow: 0 4px 15px rgba(255, 183, 178, 0.15);
}

.input-area.hitl-active {
    border-color: #f5c16c;
    background-color: #fffaf0;
}

.attach-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.2rem;
    padding: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.attach-btn:hover {
    color: var(--primary-color);
}

textarea {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    padding: 10px;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    max-height: 100px;
    color: var(--text-color);
}

.send-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(255, 158, 153, 0.3);
}

.send-btn:hover {
    transform: translateY(-1px);
    background-color: #ff8e89;
}

.footer-text {
    text-align: center;
    font-size: 0.75rem;
    color: #ccc;
    margin-top: 10px;
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Loading Indicator */
.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 15px 20px;
    background-color: var(--bot-msg-bg);
    border-radius: 20px;
    border-bottom-left-radius: 5px;
    width: fit-content;
    margin-bottom: 20px;
    animation: slideUp 0.3s ease;
}

.dot {
    width: 8px;
    height: 8px;
    background-color: #aaa;
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.dot:nth-child(1) {
    animation-delay: -0.32s;
}

.dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes typing {

    0%,
    80%,
    100% {
        transform: scale(0);
    }

    40% {
        transform: scale(1);
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #e0e0e0;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #ccc;
}

/* Responsive */
@media (max-width: 768px) {
    .app-wrapper {
        width: 100%;
        height: 100%;
        border-radius: 0;
        border: none;
    }

    .sidebar {
        display: none;
        /* Hide sidebar on mobile for now or make it collapsible */
    }
}

/* History Sidebar */
.history-sidebar {
    position: absolute;
    top: 0;
    right: 0;
    width: 320px;
    height: 100%;
    background-color: var(--white);
    border-left: 1px solid #f0f0f0;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    z-index: 20;
    display: flex;
    flex-direction: column;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
    }

    to {
        transform: translateX(0);
    }
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #f0f0f0;
}

.history-header h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 50%;
    transition: var(--transition);
}

.close-btn:hover {
    background-color: #f5f5f5;
    color: var(--primary-color);
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.empty-history {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-light);
}

.history-item {
    padding: 15px;
    margin-bottom: 8px;
    border-radius: 12px;
    background-color: #f9f9f9;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    display: flex;
    align-items: center;
    gap: 10px;
}

.history-item:hover {
    background-color: #f8fafc;
    border-color: var(--primary-light);
    transform: translateX(-3px);
}

.history-item.active {
    background-color: var(--primary-light);
    color: var(--white);
    border-color: var(--primary-color);
}

.session-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.session-title {
    font-weight: 600;
    font-size: 0.95rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* References */
.references-section {
    margin-top: 10px;
    padding: 12px 16px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
    font-size: 0.85rem;
}

.references-title {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-color);
    cursor: pointer;
}

.references-list {
    margin-top: 10px;
}

sup.cite-ref,
span.cite-ref {
    color: var(--primary-color);
    font-weight: 700;
    margin: 0 2px;
    cursor: pointer;
}

sup.cite-ref:hover,
span.cite-ref:hover {
    color: #ff6b6b;
    text-decoration: underline;
}

@keyframes highlightFade {
    0% { background-color: rgba(255, 158, 153, 0.4); border-color: var(--primary-color); }
    100% { background-color: rgba(255, 255, 255, 0.6); border-color: rgba(0, 0, 0, 0.03); }
}

.highlight-chunk {
    animation: highlightFade 2s ease-out forwards !important;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-light);
}

.history-item.active .session-meta {
    color: rgba(255, 255, 255, 0.8);
}

.session-body {
    flex: 1;
}

.history-delete-btn {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 8px;
    border-radius: 10px;
    transition: var(--transition);
}

.history-delete-btn:hover {
    background-color: rgba(255, 107, 107, 0.1);
    color: #ff6b6b;
}

.history-item.active .history-delete-btn {
    color: var(--white);
    background-color: rgba(255, 255, 255, 0.15);
}

/* Settings Panel */
.settings-panel {
    width: 100%;
    height: 100%;
    padding: 30px;
    overflow-y: auto;
    background-color: var(--bg-color);
}

.settings-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--primary-light);
}

.settings-header h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-header p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.upload-section,
.documents-section {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.upload-section h3,
.documents-section h3 {
    color: var(--text-color);
    font-size: 1.3rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.upload-area {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.upload-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    border: none;
    padding: 15px 30px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    align-self: flex-start;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 158, 153, 0.3);
}

.selected-file {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background-color: var(--bg-color);
    border-radius: 12px;
    border: 2px dashed var(--primary-light);
}

/* ── 批量上传：已选择文件列表 ── */
.selected-files-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.selected-file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background-color: var(--bg-color);
    border-radius: 8px;
    border: 1px solid #bfdbfe;
}

.selected-file-item i:first-child {
    color: var(--primary-color);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.file-name {
    flex: 1 1 auto;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.9rem;
}

.file-size {
    color: var(--text-light);
    font-size: 0.8rem;
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
}

.btn-remove-file {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    flex-shrink: 0;
    transition: background-color 0.15s, color 0.15s;
}

.btn-remove-file:hover {
    background-color: #fef2f2;
    color: #d9480f;
}

.selected-file i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 158, 153, 0.3);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
}

.btn-secondary:hover {
    background-color: #ffcda3;
    transform: translateY(-2px);
}

.btn-danger {
    background-color: #ff6b6b;
    color: var(--white);
    border: none;
    padding: 8px 15px;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-danger:hover {
    background-color: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

.btn-danger:disabled {
    cursor: not-allowed;
    opacity: 0.75;
    transform: none;
}

.upload-progress {
    padding: 12px;
    background-color: var(--accent-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 0.9rem;
    border-left: 4px solid var(--primary-color);
}

.upload-progress.collapsed {
    padding-bottom: 10px;
}

.upload-progress-header {
    width: 100%;
    padding: 0;
    border: none;
    background: transparent;
    color: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    text-align: left;
}

.upload-message {
    font-weight: 700;
    margin-bottom: 10px;
}

.upload-progress-header .upload-message {
    margin-bottom: 0;
}

.upload-toggle {
    flex: 0 0 auto;
    border-radius: 999px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.8);
    color: var(--primary-color);
    font-size: 0.82rem;
    font-weight: 700;
}

.upload-step-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.upload-step {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.upload-step-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
}

.upload-step-label {
    font-weight: 700;
}

.upload-step-percent {
    min-width: 44px;
    text-align: right;
    font-variant-numeric: tabular-nums;
    color: var(--text-light);
}

.upload-step-bar {
    height: 8px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.75);
}

.upload-step-fill {
    height: 100%;
    width: 0;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.25s ease;
}

.upload-step-message {
    color: var(--text-light);
    font-size: 0.82rem;
    line-height: 1.35;
}

.upload-step-completed .upload-step-label {
    color: #2f9e44;
}

.upload-step-failed .upload-step-label,
.upload-step-failed .upload-step-message {
    color: #d9480f;
}

.upload-step-failed .upload-step-fill {
    background: #ff6b6b;
}

.loading-indicator {
    text-align: center;
    padding: 30px;
    color: var(--text-light);
    font-size: 1rem;
}

.empty-documents {
    text-align: center;
    padding: 50px 20px;
    color: var(--text-light);
}

.empty-documents i {
    font-size: 3rem;
    color: var(--primary-light);
    margin-bottom: 15px;
    display: block;
}

.empty-documents p {
    font-size: 1.1rem;
}

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

.document-item {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    padding: 15px;
    background-color: var(--bg-color);
    border-radius: 12px;
    border: 2px solid transparent;
    transition: var(--transition);
}

.document-item.deleting {
    border-color: rgba(255, 107, 107, 0.35);
}

.document-item:hover {
    border-color: var(--primary-light);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.document-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
    min-width: 0;
}

.document-main {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.document-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
}

.delete-progress {
    border-left-color: #ff6b6b;
    background-color: #f8fafc;
}

.delete-progress .upload-step-fill {
    background: linear-gradient(90deg, #ff8787, #ffd43b);
}

.document-icon {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background-color: var(--white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.document-icon i {
    font-size: 1.5rem;
}

.document-icon .fa-file-pdf {
    color: #e74c3c;
}

.document-icon .fa-file-word {
    color: #2980b9;
}

.document-details {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 0;
}

.document-name {
    font-weight: 600;
    color: var(--text-color);
    font-size: 1rem;
    overflow-wrap: anywhere;
}

.document-row .btn-danger {
    flex: 0 0 auto;
}

.document-meta {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.document-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* Chat Area Wrapper */
.chat-area {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
}

/* Thinking Animation (inside bot bubble) */
.thinking-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 15px 20px !important;
}

.thinking-header {
    display: flex;
    align-items: center;
    gap: 10px;
}

.thinking-dots {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.tdot {
    width: 7px;
    height: 7px;
    background-color: #aaa;
    border-radius: 50%;
    animation: thinking-pulse 1.4s infinite ease-in-out both;
}

.tdot:nth-child(1) {
    animation-delay: -0.32s;
}

.tdot:nth-child(2) {
    animation-delay: -0.16s;
}

.tdot:nth-child(3) {
    animation-delay: 0s;
}

@keyframes thinking-pulse {

    0%,
    80%,
    100% {
        transform: scale(0.6);
        opacity: 0.4;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.thinking-text {
    color: #999;
    font-size: 0.88rem;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.thinking-elapsed {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-left: auto;
    flex-shrink: 0;
    white-space: nowrap;
}

.thinking-hint {
    font-size: 0.75rem;
    color: #9a5b00;
    font-style: italic;
    margin-top: 4px;
    padding-left: 20px;
    word-break: break-word;
}

.thinking-trace-hint {
    color: #9a5b00 !important;
    font-style: italic;
}

/* Thinking trace lines — RAG progress inside thinking bubble */
.thinking-trace-lines {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-left: 4px;
    border-left: 2px solid var(--border-color, #e0e0e0);
    margin-left: 10px;
}

.thinking-trace-line {
    display: flex;
    align-items: baseline;
    gap: 6px;
    font-size: 0.84rem;
    animation: fadeInTraceLine 0.3s ease;
}

@keyframes fadeInTraceLine {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }

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

.thinking-trace-icon {
    flex-shrink: 0;
    font-size: 0.78rem;
}

.thinking-trace-label {
    color: var(--text-color, #333);
    font-weight: 500;
}

.thinking-trace-detail {
    color: var(--text-light, #999);
    font-size: 0.8rem;
    margin-left: 2px;
}

/* 子 Agent 步骤分组 */
.step-group {
    margin: 2px 0;
}

.step-group-header {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    padding: 3px 6px;
    border-radius: 6px;
    transition: background 0.2s ease;
    user-select: none;
}

.step-group-header:hover {
    background: rgba(0, 0, 0, 0.04);
}

.step-group-arrow {
    font-size: 0.65rem;
    color: var(--primary-color);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.step-group-arrow.collapsed {
    transform: rotate(0deg);
}

.step-group-arrow:not(.collapsed) {
    transform: rotate(90deg);
}

.step-group-label {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--primary-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 260px;
}

.step-group-count {
    font-size: 0.72rem;
    color: var(--text-light);
    flex-shrink: 0;
    margin-left: auto;
}

.step-group-body {
    padding-left: 16px;
    border-left: 2px solid var(--primary-light, #ffb7b2);
    margin-left: 8px;
}

/* Real-time RAG steps */
.rag-steps-live {
    margin-top: 6px;
}

.rag-step-item {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 4px;
    font-size: 0.85rem;
    animation: fadeInStep 0.3s ease;
}

@keyframes fadeInStep {
    from {
        opacity: 0;
        transform: translateX(-8px);
    }

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

.rag-step-icon {
    flex-shrink: 0;
    font-size: 0.75rem;
}

.rag-step-text {
    color: var(--text-color);
    font-weight: 500;
}

.rag-step-detail {
    color: var(--text-light);
    font-size: 0.8rem;
    margin-left: 4px;
}

/* Stop button */
.stop-btn {
    background-color: #ff6b6b !important;
    box-shadow: 0 4px 10px rgba(255, 107, 107, 0.3) !important;
}

.stop-btn:hover {
    background-color: #ee5a5a !important;
    transform: scale(1.1) !important;
}

/* Professional RAG Console Theme */
:root {
    --primary-color: #1d4f91;
    --primary-light: #dbeafe;
    --secondary-color: #e0f2fe;
    --accent-color: #dcfce7;
    --bg-color: #eef2f7;
    --text-color: #172033;
    --text-light: #64748b;
    --white: #ffffff;
    --sidebar-bg: #101827;
    --bot-msg-bg: #ffffff;
    --user-msg-bg: #1d4f91;
    --border-color: #d7dee8;
    --panel-border: #e5eaf1;
    --muted-panel: #f8fafc;
    --success-color: #16a34a;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --shadow: 0 18px 48px rgba(15, 23, 42, 0.12);
    --soft-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
    --border-radius: 8px;
    --transition: all 0.18s ease;
}

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    background:
        linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
    color: var(--text-color);
    justify-content: center;
    align-items: center;
    letter-spacing: 0;
}

.app-wrapper {
    width: min(96vw, 1440px);
    height: min(92vh, 960px);
    max-width: 1440px;
    border: 1px solid #dbe3ee;
    border-radius: 16px;
    background: var(--white);
    box-shadow: var(--shadow);
}

.sidebar {
    width: 272px;
    background:
        linear-gradient(180deg, #101827 0%, #172033 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    padding: 22px 18px;
    color: #dbeafe;
}

.sidebar-header {
    gap: 12px;
    margin-bottom: 28px;
    padding: 6px 4px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: #e0f2fe;
    color: #0f3f78;
    font-size: 0.9rem;
    box-shadow: none;
    animation: none;
}

.logo-mark {
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-weight: 700;
    letter-spacing: 0;
}

.brand-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-header h2 {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    color: #f8fafc;
    font-size: 1.12rem;
    font-weight: 700;
    letter-spacing: 0;
    line-height: 1.1;
}

.brand-copy span {
    font-family: 'JetBrains Mono', Consolas, monospace;
    color: #93c5fd;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0;
    text-transform: uppercase;
}

.sidebar-nav {
    gap: 6px;
}

.nav-btn {
    border-radius: 8px;
    padding: 11px 12px;
    color: #cbd5e1;
    font-size: 0.94rem;
    font-weight: 600;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #f8fafc;
    transform: translateX(2px);
}

.nav-btn.active {
    background: #e0f2fe;
    color: #0f3f78;
    box-shadow: none;
}

.sidebar-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.danger-btn {
    border: 1px solid rgba(248, 113, 113, 0.28);
    border-radius: 8px;
    background: rgba(127, 29, 29, 0.18);
    color: #fecaca;
    box-shadow: none;
}

.danger-btn:hover {
    background: rgba(185, 28, 28, 0.24);
    color: #fee2e2;
}

.user-badge {
    border: 1px solid rgba(147, 197, 253, 0.22);
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.35);
    color: #f8fafc;
}

.user-badge small {
    color: #93c5fd;
    font-family: 'JetBrains Mono', Consolas, monospace;
    letter-spacing: 0;
}

.main-content {
    background: #f5f7fb;
}

.auth-panel {
    width: min(460px, 88%);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    box-shadow: var(--soft-shadow);
    padding: 30px;
}

.auth-kicker {
    width: fit-content;
    margin-bottom: 12px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    background: #eff6ff;
    color: #1d4f91;
    padding: 4px 10px;
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-size: 0.72rem;
    font-weight: 600;
}

.auth-panel h2 {
    color: var(--text-color);
    font-size: 1.45rem;
    font-weight: 700;
}

.auth-panel p {
    color: var(--text-light);
    line-height: 1.65;
}

.auth-form {
    gap: 12px;
}

.auth-form input,
.auth-form select {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #ffffff;
    color: var(--text-color);
    min-height: 42px;
}

.auth-form input:focus,
.auth-form select:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.auth-submit {
    border-radius: 8px !important;
}

.auth-switch {
    color: var(--primary-color);
}

.chat-header {
    padding: 14px 24px;
    border-bottom: 1px solid var(--panel-border);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
}

.header-info {
    color: var(--text-color);
    font-size: 0.94rem;
}

.status-dot {
    width: 9px;
    height: 9px;
    background: var(--success-color);
    box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.12);
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid transparent;
    color: var(--text-light);
    font-size: 1rem;
}

.icon-btn:hover {
    border-color: var(--border-color);
    background: var(--muted-panel);
    color: var(--primary-color);
}

.chat-container {
    padding: 24px;
    gap: 16px;
    background:
        linear-gradient(90deg, rgba(226, 232, 240, 0.32) 1px, transparent 1px),
        linear-gradient(180deg, rgba(226, 232, 240, 0.32) 1px, transparent 1px),
        #f5f7fb;
    background-size: 32px 32px;
}

.welcome-screen {
    max-width: 680px;
    margin: auto;
    color: var(--text-light);
    text-align: left;
    animation: fadeIn 0.3s ease;
}

.big-avatar {
    width: 56px;
    height: 56px;
    margin-bottom: 18px;
    border: 1px solid #bfdbfe;
    border-radius: 12px;
    background: #eff6ff;
    color: var(--primary-color);
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: none;
}

.avatar-mark {
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: 0;
}

.welcome-screen h3 {
    color: var(--text-color);
    font-size: 1.65rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.welcome-screen p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.8;
    text-wrap: pretty;
}

.example-questions {
    margin-top: 24px;
    text-align: left;
}

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

.example-questions-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-light);
}

.example-questions-manage-btn {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--white);
    color: var(--primary-color);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 4px 12px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.example-questions-manage-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
}

.example-questions-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.example-question-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: var(--white);
    color: var(--primary-color);
    font-size: 0.88rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.example-question-chip:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.example-question-chip i {
    font-size: 0.72rem;
    opacity: 0.55;
}

.example-question-chip:hover i {
    opacity: 1;
}

.prompts-section {
    background-color: var(--white);
    border: 1px solid var(--panel-border);
    border-radius: var(--border-radius);
    padding: 22px;
    margin-bottom: 25px;
}

.prompts-section h3 {
    color: var(--text-color);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.prompts-section h3 i {
    color: var(--primary-color);
}

.section-desc {
    color: var(--text-light);
    font-size: 0.88rem;
    margin-bottom: 14px;
}

.prompt-editor {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.prompt-editor textarea {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 80px;
    color: var(--text-color);
    background: #ffffff;
    outline: none;
}

.prompt-editor textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.prompt-editor .btn-primary {
    align-self: flex-start;
}

.message {
    max-width: min(82%, 880px);
    animation: slideUp 0.2s ease;
}

.message-content {
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    box-shadow: none;
    padding: 14px 16px;
    font-size: 0.95rem;
    line-height: 1.75;
    text-wrap: pretty;
}

.bot-message .message-content {
    background: var(--bot-msg-bg);
    color: var(--text-color);
    border-bottom-left-radius: 8px;
}

.user-message .message-content {
    background: var(--user-msg-bg);
    color: #ffffff;
    border-color: #1d4f91;
    border-bottom-right-radius: 8px;
}

.message-meta {
    border: 1px solid #dbeafe;
    border-radius: 8px;
    background: #eff6ff;
    color: var(--text-color);
    font-size: 0.84rem;
}

.reasoning-details summary {
    color: var(--primary-color);
}

.reasoning-content {
    margin-top: 10px;
}

.trace-line {
    border-bottom: 1px solid rgba(29, 79, 145, 0.08);
    padding-bottom: 6px;
}

.sources {
    border-top: 1px solid rgba(29, 79, 145, 0.14);
    padding-top: 10px;
}

.sources-title {
    color: var(--text-color);
}

.source-item {
    border: 1px solid #cfe1f8;
    border-radius: 8px;
    background: #ffffff;
    padding: 9px 10px;
}

.source-file {
    color: var(--primary-color);
}

.source-page,
.source-excerpt {
    color: var(--text-light);
}

.source-meta-line {
    font-family: 'JetBrains Mono', Consolas, monospace;
}

.message-content pre {
    border: 1px solid #d8e0ea;
    border-radius: 8px;
    background: #0f172a;
    color: #e2e8f0;
}

.message-content code {
    font-family: 'JetBrains Mono', Consolas, monospace;
}

.input-area-wrapper {
    border-top: 1px solid var(--panel-border);
    background: #ffffff;
    padding: 16px 24px 14px;
}

.input-area {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: #f8fafc;
    padding: 8px;
}

.input-area:focus-within {
    border-color: #2563eb;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.attach-btn {
    color: var(--text-light);
}

.attach-btn:hover {
    color: var(--primary-color);
}

textarea {
    color: var(--text-color);
    font-size: 0.98rem;
}

.send-btn,
.btn-primary,
.upload-btn {
    background: var(--primary-color);
    color: #ffffff;
    box-shadow: none;
}

.send-btn {
    width: 42px;
    height: 42px;
    border-radius: 8px;
}

.send-btn:hover,
.btn-primary:hover:not(:disabled),
.upload-btn:hover {
    background: #174476;
    box-shadow: 0 8px 18px rgba(29, 79, 145, 0.18);
    transform: translateY(-1px);
}

.stop-btn {
    background: var(--danger-color) !important;
    box-shadow: none !important;
}

.stop-btn:hover {
    background: #b91c1c !important;
    transform: translateY(-1px) !important;
}

.footer-text {
    color: #94a3b8;
}

.history-sidebar {
    width: 360px;
    border-left: 1px solid var(--panel-border);
    box-shadow: -18px 0 42px rgba(15, 23, 42, 0.12);
}

.history-header {
    border-bottom: 1px solid var(--panel-border);
}

.history-header h3 {
    color: var(--text-color);
}

.close-btn {
    border-radius: 8px;
}

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

.history-item {
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: #ffffff;
    padding: 13px;
}

.history-item:hover {
    border-color: #bfdbfe;
    background: #f8fafc;
    transform: translateX(-2px);
}

.history-item.active {
    border-color: #1d4f91;
    background: #eff6ff;
    color: var(--text-color);
}

.history-item.active .session-meta {
    color: var(--text-light);
}

.session-title {
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-size: 0.82rem;
}

.history-item.active .history-delete-btn {
    color: var(--danger-color);
    background: rgba(220, 38, 38, 0.08);
}

.settings-panel {
    background: #f5f7fb;
    padding: 24px;
}

.settings-header {
    border-bottom: 1px solid var(--panel-border);
    margin-bottom: 20px;
    padding-bottom: 18px;
}

.settings-header h2 {
    color: var(--text-color);
    font-size: 1.45rem;
    font-weight: 700;
}

.settings-header h2 i {
    color: var(--primary-color);
}

.settings-header p {
    color: var(--text-light);
}

.upload-section,
.documents-section {
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    box-shadow: none;
    background: #ffffff;
    padding: 22px;
}

.upload-section h3,
.documents-section h3 {
    color: var(--text-color);
    font-size: 1.05rem;
    font-weight: 700;
}

.upload-section h3 i,
.documents-section h3 i {
    color: var(--primary-color);
}

.upload-btn,
.btn-primary,
.btn-secondary,
.btn-danger {
    border-radius: 8px;
    font-weight: 700;
}

.upload-btn {
    padding: 12px 18px;
}

.btn-secondary {
    border: 1px solid var(--border-color);
    background: #ffffff;
    color: var(--text-color);
}

.btn-secondary:hover {
    border-color: #bfdbfe;
    background: #eff6ff;
    color: var(--primary-color);
    transform: translateY(-1px);
}

.btn-danger {
    background: #fee2e2;
    color: var(--danger-color);
}

.btn-danger:hover {
    background: var(--danger-color);
    color: #ffffff;
    box-shadow: none;
    transform: translateY(-1px);
}

.selected-file {
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    background: #eff6ff;
}

.selected-file i {
    color: var(--primary-color);
}

.upload-progress {
    border: 1px solid #bfdbfe;
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    background: #eff6ff;
}

.upload-toggle {
    border: 1px solid #bfdbfe;
    background: #ffffff;
    color: var(--primary-color);
}

.upload-step-header {
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-size: 0.82rem;
}

.upload-step-bar {
    height: 7px;
    background: #dbeafe;
}

.upload-step-fill {
    background: linear-gradient(90deg, var(--primary-color), #38bdf8);
}

.upload-step-message {
    color: var(--text-light);
}

.upload-step-completed .upload-step-label {
    color: var(--success-color);
}

.upload-step-running .upload-step-label {
    color: var(--primary-color);
}

.upload-step-failed .upload-step-label,
.upload-step-failed .upload-step-message {
    color: var(--danger-color);
}

.delete-progress {
    border-color: #fed7aa;
    border-left-color: var(--warning-color);
    background: #fff7ed;
}

.delete-progress .upload-step-fill {
    background: linear-gradient(90deg, var(--warning-color), #fbbf24);
}

.document-item {
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: #ffffff;
    padding: 14px;
}

.document-item:hover {
    border-color: #bfdbfe;
    box-shadow: none;
}

.document-item.deleting {
    border-color: #fed7aa;
    background: #fffaf3;
}

.document-icon {
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    background: #f8fafc;
    box-shadow: none;
}

.document-name {
    color: var(--text-color);
}

.document-meta {
    color: var(--text-light);
    font-family: 'JetBrains Mono', Consolas, monospace;
    font-size: 0.78rem;
}

.empty-documents,
.empty-history,
.loading-indicator {
    color: var(--text-light);
}

.empty-documents i {
    color: #bfdbfe;
}

.thinking-content {
    gap: 10px;
}

.thinking-dots .tdot,
.tdot {
    background-color: var(--primary-color);
}

.thinking-text {
    color: var(--text-light);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.thinking-trace-lines {
    border-left: 2px solid #bfdbfe;
}

.thinking-trace-label {
    color: var(--text-color);
    font-weight: 600;
}

.thinking-trace-detail {
    color: var(--text-light);
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

@media (max-width: 768px) {
    .app-wrapper {
        width: 100%;
        height: 100%;
        border-radius: 0;
    }

    .chat-container,
    .settings-panel {
        padding: 16px;
    }

    .message {
        max-width: 92%;
    }

    .history-sidebar {
        width: min(100%, 360px);
    }
}