.chat-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 12px;
    background: var(--color-bg-primary);
    box-sizing: border-box;
    gap: 10px;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
}

.chat-provider-chip {
    font-size: 0.62rem;
    border-radius: 999px;
    background: var(--color-bg-secondary, rgba(0, 0, 0, 0.06));
    border: 1px solid var(--color-border-light, rgba(0, 0, 0, 0.08));
    color: var(--color-text-primary, #222222);
    line-height: 1.2;
}

.chat-provider-selector {
    position: relative;
    width: 140px;
    max-width: 100%;
    flex-shrink: 0;
}

.chat-provider-toggle {
    width: 100%;
    padding: 6px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    font: inherit;
    font-size: 0.76rem;
    color: inherit;
    background: var(--color-bg-secondary, rgba(0, 0, 0, 0.06));
    border: 1px solid var(--color-border-light, rgba(0, 0, 0, 0.08));
    border-radius: 999px;
    cursor: pointer;
    text-align: left;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.chat-provider-toggle:focus-visible {
    outline: none;
    border-color: var(--color-primary, #5a7dfc);
    box-shadow: 0 0 0 2px rgba(90, 125, 252, 0.2);
}

.chat-provider-toggle:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.provider-indicator,
.provider-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    background: var(--dot-color, transparent);
    transition: background 0.2s ease;
}

.provider-toggle-label {
    flex: 1;
    font-size: 0.78rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.provider-toggle-icon {
    width: 12px;
    height: 8px;
    flex-shrink: 0;
    transition: transform 0.2s ease;
    transform: rotate(180deg);
}

.chat-provider-selector.is-open .provider-toggle-icon {
    transform: rotate(0deg);
}

.chat-provider-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    margin: 0;
    padding: 6px;
    list-style: none;
    background: var(--color-bg-primary, #ffffff);
    border: 1px solid var(--color-border-light, rgba(0, 0, 0, 0.08));
    border-radius: 12px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.15);
    max-height: 240px;
    overflow-y: auto;
    display: none;
    z-index: 30;
}

.chat-provider-selector.is-open-up .chat-provider-menu {
    top: auto;
    bottom: calc(100% + 6px);
}

.chat-provider-selector.is-open .chat-provider-menu {
    display: block;
}

.chat-icon-toggle {
    width: 30px;
    height: 30px;
    padding: 6px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease, color 0.2s ease;
}

.chat-icon-toggle svg {
    width: 18px;
    height: 18px;
}

.chat-icon-toggle.is-active {
    background: var(--color-primary, #5a7dfc);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.2);
}

#chat-context-btn.chat-icon-toggle.is-active {
    background: #d6d6d6;
    color: var(--color-text-primary, #1f1f1f);
    border-color: rgba(0, 0, 0, 0.08);
}

.chat-provider-name {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-secondary, #6c6c6c);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    width: 22px;
    height: 22px;
    border-radius: 6px;
    background: var(--color-bg-secondary, rgba(0, 0, 0, 0.08));
    text-transform: uppercase;
    cursor: default;
    user-select: none;
}

.chat-provider-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.72rem;
    color: var(--color-text-primary, #222222);
    transition: background 0.15s ease;
}

.chat-provider-option:hover {
    background: rgba(90, 125, 252, 0.1);
}

.chat-provider-option.is-selected {
    background: rgba(90, 125, 252, 0.18);
}

.chat-provider-option:focus-visible {
    outline: none;
    box-shadow: inset 0 0 0 1px var(--color-primary, #5a7dfc);
}

.chat-provider-option .provider-name {
    flex: 1;
}

.chat-provider-empty {
    padding: 10px;
    font-size: 0.72rem;
    color: var(--color-text-secondary, #6c6c6c);
    text-align: center;
}

.chat-body {
    flex: 1;
    overflow: hidden;
    border: 1px solid var(--color-border-light, rgba(0,0,0,0.06));
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--color-bg-secondary, #282828);
}

.chat-messages {
    flex: 1;
    padding: 12px 14px 8px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-message {
    max-width: 92%;
    padding: 10px 12px;
    border-radius: 12px;
    background: var(--color-bg-primary, rgba(0, 0, 0, 0.03));
    border: 1px solid var(--color-border-light, rgba(0,0,0,0.08));
    line-height: 1.5;
    color: var(--color-text-primary, #222222);
    font-size: 0.8rem;
}

.chat-message p,
.chat-message ul,
.chat-message ol,
.chat-message li,
.chat-message pre,
.chat-message code,
.chat-message table,
.chat-message th,
.chat-message td {
    font-size: inherit;
}

/* 用户消息单独缩小字号，确保优先级高于基础样式 */
.chat-message.user {
    margin-left: auto;
    background: rgba(90, 125, 252, 0.12);
    color: var(--color-text-primary, #222);
    border-color: rgba(90, 125, 252, 0.25);
    font-size: 0.8rem;
}

.chat-message.assistant {
    background: rgba(90, 125, 252, 0.05);
}

.chat-message.tool {
    font-size: 0.85rem;
    background: rgba(65, 216, 136, 0.08);
    border-color: rgba(65, 216, 136, 0.4);
}

.chat-message-meta {
    font-size: 0.75rem;
    margin-bottom: 4px;
    color: var(--color-text-secondary, #bdbdbd);
}

.chat-message.system {
    font-size: 0.75rem;
    opacity: 0.8;
}

.chat-message.status-message {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(90, 125, 252, 0.08);
    border-color: rgba(90, 125, 252, 0.3);
    color: var(--color-text-primary, #3d3d3d);
}

.chat-message.status-message.success {
    background: rgba(65, 216, 136, 0.12);
    border-color: rgba(65, 216, 136, 0.35);
}

.chat-message.status-message.error {
    background: rgba(255, 107, 107, 0.12);
    border-color: rgba(255, 107, 107, 0.35);
}

.chat-status-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.chat-status-icon path {
    stroke: #5a7dfc;
}

.chat-message.status-message.success .chat-status-icon path {
    stroke: #41d888;
}

.chat-message.status-message.error .chat-status-icon path {
    stroke: #ff6b6b;
}

.chat-message.status-message.info .chat-status-icon path {
    stroke: #666666;
}

.chat-message.status-message .status-message-text {
    flex: 1;
    font-size: 0.82rem;
    line-height: 1.4;
}

.chat-message pre,
.chat-message code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    background: rgba(0, 0, 0, 0.35);
    padding: 4px 6px;
    border-radius: 6px;
    display: block;
    margin-top: 6px;
    white-space: pre-wrap;
}

.chat-message + .chat-message {
    margin-top: 0;
}

.chat-input-area {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-message-body {
    word-break: break-word;
}
.chat-message-body ul,
.chat-message-body ol {
    margin: 6px 0 6px 18px;
    padding-left: 12px;
}
.chat-message-body li + li {
    margin-top: 4px;
}
.chat-message-body p {
    margin: 6px 0;
}
.chat-message-body a {
    color: var(--color-link, #2563eb);
    text-decoration: underline;
}

.chat-attachment-toolbar {
    display: none;
    flex-wrap: wrap;
    gap: 10px;
    align-items: stretch;
}

.chat-attachment-add-btn {
    width: 38px;
    height: 38px;
    padding: 6px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.chat-attachment-add-btn svg {
    width: 20px;
    height: 20px;
}

.chat-undo-btn {
    width: 38px;
    height: 38px;
    padding: 6px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.chat-undo-btn svg {
    width: 20px;
    height: 20px;
}

.chat-attachment-list {
    flex: 1;
    min-height: 36px;
    padding: 6px 8px;
    border: 1px solid var(--color-border-light, rgba(0, 0, 0, 0.08));
    border-radius: 10px;
    background: var(--color-bg-secondary, rgba(0, 0, 0, 0.02));
    display: none;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.chat-attachment-empty {
    font-size: 0.78rem;
    color: var(--color-text-secondary, #7a7a7a);
}

.chat-attachment-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    border-radius: 8px;
    background: #ffffff;
    border: 1px solid var(--color-border-light, rgba(0, 0, 0, 0.12));
    font-size: 0.78rem;
    max-width: 240px;
}

.chat-attachment-thumb {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    object-fit: cover;
    background: rgba(0, 0, 0, 0.05);
}

.chat-attachment-thumb-text {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--color-text-secondary, #7a7a7a);
}

.chat-attachment-meta {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chat-attachment-name {
    font-weight: 600;
    font-size: 0.78rem;
    color: var(--color-text-primary, #333333);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-attachment-size {
    font-size: 0.72rem;
    color: var(--color-text-secondary, #8f8f8f);
}

.chat-attachment-remove {
    border: none;
    background: transparent;
    color: var(--color-text-secondary, #7a7a7a);
    padding: 0;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
}

.chat-attachment-remove svg {
    width: 14px;
    height: 14px;
}

.chat-attachment-remove:hover {
    color: var(--color-error, #ff6b6b);
}

.chat-message-attachments {
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-message-attachment {
    border-radius: 10px;
    border: 1px dashed var(--color-border-light, rgba(0, 0, 0, 0.2));
    padding: 8px;
    background: rgba(0, 0, 0, 0.03);
}

.chat-message-attachment-header {
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text-secondary, #5a5a5a);
}

.chat-message-attachment-text {
    max-height: 220px;
    overflow: auto;
    padding: 6px;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.04);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.78rem;
    white-space: pre-wrap;
}

.chat-message-attachment-image {
    max-height: 320px;
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    display: block;
}

.chat-input {
    width: 100%;
    resize: vertical;
    min-height: 56px;
    max-height: 120px;
    height: 56px;
    border-radius: 12px;
    padding: 10px 12px;
    background: var(--color-bg-secondary, #282828);
    border: 1px solid var(--color-border-light, rgba(0,0,0,0.12));
    color: var(--color-text-primary, #333333);
    caret-color: var(--color-primary, #5a7dfc);
    font-size: 0.85rem;
    line-height: 1.35;
}

.chat-input::placeholder {
    color: var(--color-text-secondary, #8a8a8a);
}

.chat-input:focus {
    outline: none;
    border-color: var(--color-primary, #5a7dfc);
    box-shadow: 0 0 0 2px rgba(90, 125, 252, 0.2);
}

[data-theme="light"] .chat-input {
    background: var(--sidebar-light-theme-input-bg, #ffffff);
    border-color: var(--sidebar-light-theme-input-border, #ced4da);
}

[data-theme="dark"] .chat-input {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.14);
}

[data-theme="light"] .chat-body {
    background: var(--sidebar-light-theme-input-bg, #ffffff);
    border-color: var(--sidebar-light-theme-input-border, #ced4da);
}

[data-theme="dark"] .chat-body {
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.14);
}

[data-theme="dark"] .chat-message.assistant {
    background: rgba(90, 125, 252, 0.12);
    border-color: rgba(90, 125, 252, 0.28);
}

[data-theme="dark"] .chat-empty-state {
    color: rgba(240, 240, 240, 0.72);
}

.chat-input-toolbar {
    display: flex;
    flex-direction: column;
    gap: 10px;
}


.chat-toolbar-left {
    display: flex;
    align-items: center;
    min-height: 38px;
    padding-top: 0;
    gap: 8px;
}

.chat-toolbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-action-buttons {
    display: flex;
    gap: 8px;
}

.chat-primary-btn,
.chat-secondary-btn {
    border: none;
    border-radius: 50%;
    padding: 0;
    width: 30px;
    height: 30px;
    font-size: 0.88rem;
    cursor: pointer;
    transition: background 0.2s ease, opacity 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.chat-primary-btn {
    background: var(--color-primary, #5a7dfc);
    color: #fff;
}

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

.chat-secondary-btn {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-primary, #f3f3f3);
    border: 1px solid var(--color-border-light, rgba(255,255,255,0.08));
}

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

.chat-primary-btn svg,
.chat-secondary-btn svg {
    width: 14px;
    height: 14px;
    display: block;
}

.chat-primary-btn .icon-loading {
    display: none;
}

.chat-toolbar-row-single {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: 12px;
    min-height: 38px;
}

.chat-primary-btn.is-loading .icon-send {
    display: none;
}

.chat-primary-btn.is-loading .icon-loading {
    display: block;
    animation: chat-send-spin 0.9s linear infinite;
}

@keyframes chat-send-spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.chat-icon-button {
    position: relative;
}

.chat-icon-button::after,
.chat-icon-button::before {
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.chat-icon-button::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translate(-50%, 4px);
    background: rgba(36, 38, 52, 0.92);
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.72rem;
    white-space: nowrap;
    z-index: 10;
}

.chat-icon-button::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translate(-50%, 4px);
    border: 6px solid transparent;
    border-top-color: rgba(36, 38, 52, 0.92);
}

:root[data-theme="light"] .chat-icon-button::after,
body[data-theme="light"] .chat-icon-button::after,
.theme-light .chat-icon-button::after {
    background: rgba(255, 255, 255, 0.95);
    color: #1d1d1f;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] .chat-icon-button::before,
body[data-theme="light"] .chat-icon-button::before,
.theme-light .chat-icon-button::before {
    border-top-color: rgba(255, 255, 255, 0.95);
}

.chat-icon-button:hover::after,
.chat-icon-button:hover::before,
.chat-icon-button:focus-visible::after,
.chat-icon-button:focus-visible::before {
    opacity: 1;
    transform: translate(-50%, 0);
}

#tab-content-chat {
    height: 100%;
}

#tab-content-chat.active {
    display: block;
}

.chat-empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-secondary, #a0a0a0);
    font-size: 0.78rem;
}

.chat-message strong {
    color: var(--color-text-primary, #fff);
}

.chat-message ul,
.chat-message ol {
    margin: 6px 0 6px 18px;
    padding: 0;
}

.chat-message li {
    margin-bottom: 4px;
}

.chat-message a {
    color: var(--color-primary, #5a7dfc);
}

.chat-message table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 8px;
    font-size: inherit;
}

.chat-message table th,
.chat-message table td {
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 4px 6px;
}

.chat-message table th {
    background: rgba(255, 255, 255, 0.05);
}

@media (max-height: 700px) {
    .chat-panel {
        padding: 8px;
    }
    .chat-input {
        min-height: 64px;
    }
}