/* --- Modernized M3-Inspired Styles --- */
:root {
    /* Material 3 宇宙极光主题 - 亮色调色板 (更柔和版) */
    --primary-rgb: 85, 77, 175;
    /* #554DAF - 柔和深蓝紫色 */
    --on-primary-rgb: 255, 255, 255;
    /* 在主色上的文本 */
    --primary-container-rgb: 231, 229, 252;
    /* #E7E5FC - 柔和淡紫色容器 */
    --on-primary-container-rgb: 31, 26, 70;
    /* #1F1A46 - 主色容器上的文本 */

    --secondary-rgb: 105, 81, 146;
    /* #695192 - 柔和紫罗兰色 */
    --on-secondary-rgb: 255, 255, 255;
    /* 次色上的文本 */
    --secondary-container-rgb: 238, 230, 255;
    /* #EEE6FF - 更淡的紫色容器 */
    --on-secondary-container-rgb: 45, 32, 70;
    /* #2D2046 - 次色容器上的文本 */

    --tertiary-rgb: 76, 173, 188;
    /* #4CADBC - 柔和青蓝色 */
    --on-tertiary-rgb: 0, 55, 62;
    /* #00373E - 第三色上的文本 */
    --tertiary-container-rgb: 220, 242, 246;
    /* #DCF2F6 - 淡青蓝色容器 */
    --on-tertiary-container-rgb: 8, 76, 84;
    /* #084C54 - 第三色容器上的文本 */

    --surface-rgb: 249, 249, 252;
    /* #F9F9FC - 更中性的表面 */
    --on-surface-rgb: 28, 30, 34;
    /* #1C1E22 - 表面上的文本 */
    --surface-variant-rgb: 232, 231, 242;
    /* #E8E7F2 - 更柔和的表面变体 */
    --on-surface-variant-rgb: 73, 74, 90;
    /* #494A5A - 表面变体上的文本 */

    --error-rgb: 178, 69, 122;
    /* #B2457A - 柔和的错误色 */
    --on-error-rgb: 255, 255, 255;
    /* 错误色上的文本 */
    --error-container-rgb: 255, 228, 238;
    /* #FFE4EE - 更淡的错误容器 */
    --on-error-container-rgb: 75, 13, 49;
    /* #4B0D31 - 错误容器上的文本 */

    --outline-rgb: 128, 127, 147;
    /* #807F93 - 柔和轮廓线 */

    /* 亮色主题变量 */
    --bg-color: #f5f5fa;
    /* 更中性的淡色背景 */
    --container-bg: rgb(var(--surface-rgb));
    /* 表面 */
    --text-color: rgb(var(--on-surface-rgb));
    /* 文本颜色 */

    --primary-color: rgb(var(--primary-rgb));
    /* 主色 */
    --on-primary: rgb(var(--on-primary-rgb));
    /* 主色上的文本 */
    --primary-container: rgb(var(--primary-container-rgb));
    /* 主色容器 */
    --on-primary-container: rgb(var(--on-primary-container-rgb));
    /* 主色容器上的文本 */

    --secondary-color: rgb(var(--secondary-rgb));
    /* 次色 */
    --on-secondary: rgb(var(--on-secondary-rgb));
    /* 次色上的文本 */
    --secondary-container: rgb(var(--secondary-container-rgb));
    /* 次色容器 */
    --on-secondary-container: rgb(var(--on-secondary-container-rgb));
    /* 次色容器上的文本 */

    --user-msg-bg: var(--primary-container);
    /* 用户消息背景 */
    --user-msg-text: var(--on-primary-container);
    /* 用户消息文本 */
    --assistant-msg-bg: rgb(var(--surface-variant-rgb));
    /* 助手消息背景 */
    --assistant-msg-text: rgb(var(--on-surface-variant-rgb));
    /* 助手消息文本 */
    --system-msg-bg: rgba(var(--on-surface-rgb), 0.05);
    /* 系统消息背景 */
    --system-msg-text: rgba(var(--on-surface-rgb), 0.7);
    /* 系统消息文本 */

    --error-color: rgb(var(--error-rgb));
    /* 错误颜色 */
    --on-error: rgb(var(--on-error-rgb));
    /* 错误颜色上的文本 */
    --error-container: rgb(var(--error-container-rgb));
    /* 错误容器 */
    --on-error-container: rgb(var(--on-error-container-rgb));
    /* 错误容器上的文本 */
    --error-msg-bg: var(--error-container);
    --error-msg-text: var(--on-error-container);

    --border-color: rgba(var(--outline-rgb), 0.7);
    /* 边框颜色 */
    --input-bg: var(--container-bg);
    /* 输入框背景 */
    --input-border: rgba(var(--outline-rgb), 0.4);
    /* 输入框边框 */
    --input-focus-border: var(--primary-color);
    /* 输入框聚焦边框 */
    --input-focus-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
    /* 聚焦阴影 */

    --button-bg: var(--primary-color);
    /* 按钮背景 */
    --button-text: var(--on-primary);
    /* 按钮文本 */
    --button-hover-bg: rgb(71, 64, 150);
    /* 按钮悬停背景 - 深蓝色 */
    --button-disabled-bg: rgba(var(--on-surface-rgb), 0.12);
    /* 禁用按钮背景 */
    --button-disabled-text: rgba(var(--on-surface-rgb), 0.38);
    /* 禁用按钮文本 */

    --clear-button-bg: rgba(var(--secondary-rgb), 0.9);
    /* 清除按钮背景 */
    --clear-button-text: var(--on-secondary);
    /* 清除按钮文本 */
    --clear-button-hover-bg: rgb(92, 71, 128);
    /* 清除按钮悬停背景 - 深紫色 */

    --sidebar-bg: rgba(var(--surface-rgb), 0.95);
    /* 侧边栏背景 */
    --sidebar-border: rgba(var(--outline-rgb), 0.3);
    /* 侧边栏边框 */

    --icon-button-bg: transparent;
    --icon-button-hover-bg: rgba(var(--primary-rgb), 0.08);
    --icon-button-color: rgb(var(--on-surface-variant-rgb));

    --log-terminal-bg: #232043;
    /* 日志终端背景 - 深蓝紫色但更柔和 */
    --log-terminal-text: #d8d8e8;
    /* 日志终端文本 - 更柔和的淡紫白色 */
    --log-status-text: #f0f0ff;
    /* 日志状态文本 - 浅色模式下使用更亮的白色 */
    --log-status-error: #ff9db3;
    /* 日志状态错误文本 - 浅色模式下的错误颜色 */

    --theme-toggle-hover-bg: rgba(var(--secondary-rgb), 0.08);
    --theme-toggle-color: var(--icon-button-color);
    --theme-toggle-bg: transparent;

    --card-bg: var(--container-bg);
    --card-border: rgba(var(--outline-rgb), 0.2);
    --card-shadow: var(--shadow-sm);

    /* 边框半径 */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 28px;

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(85, 77, 175, 0.08), 0 1px 2px rgba(85, 77, 175, 0.04);
    --shadow-md: 0 4px 6px rgba(85, 77, 175, 0.06), 0 2px 4px rgba(85, 77, 175, 0.06);
    --shadow-lg: 0 10px 15px rgba(85, 77, 175, 0.04), 0 4px 6px rgba(85, 77, 175, 0.03);

    /* 尺寸变量 */
    --sidebar-width: 320px;
    --sidebar-transition: width 0.3s ease, padding 0.3s ease, border 0.3s ease, transform 0.3s ease;
    --content-padding: 16px;

    /* 动画速度 */
    --transition-speed: 0.2s;
}

/* 深色模式调色板 */
html.dark-mode {
    /* 深色主题 宇宙极光 调色板 (更柔和版) */
    --primary-rgb: 161, 153, 219;
    /* #A199DB - 柔和紫蓝色 */
    --on-primary-rgb: 38, 33, 80;
    /* #262150 - 深蓝紫色 */
    --primary-container-rgb: 60, 53, 113;
    /* #3C3571 - 柔和深蓝紫色容器 */
    --on-primary-container-rgb: 231, 229, 252;
    /* #E7E5FC - 柔和淡紫色 */

    --secondary-rgb: 184, 171, 216;
    /* #B8ABD8 - 柔和的淡紫蓝色 */
    --on-secondary-rgb: 47, 36, 71;
    /* #2F2447 - 深紫色 */
    --secondary-container-rgb: 70, 57, 98;
    /* #463962 - 中深紫色 */
    --on-secondary-container-rgb: 238, 230, 255;
    /* #EEE6FF - 更淡的紫色 */

    --tertiary-rgb: 130, 200, 211;
    /* #82C8D3 - 柔和青蓝色 */
    --on-tertiary-rgb: 10, 73, 82;
    /* #0A4952 - 深青色 */
    --tertiary-container-rgb: 15, 86, 96;
    /* #0F5660 - 中深青色 */
    --on-tertiary-container-rgb: 195, 241, 252;
    /* #C3F1FC - 淡青色 */

    --surface-rgb: 28, 26, 46;
    /* #1C1A2E - 更柔和的深蓝紫黑色 */
    --on-surface-rgb: 231, 230, 245;
    /* #E7E6F5 - 淡紫白色 */
    --surface-variant-rgb: 68, 66, 86;
    /* #444256 - 柔和的中深紫色 */
    --on-surface-variant-rgb: 214, 212, 232;
    /* #D6D4E8 - 柔和的淡紫色 */

    --error-rgb: 231, 162, 195;
    /* #E7A2C3 - 更柔和的淡粉色 */
    --on-error-rgb: 72, 19, 50;
    /* #481332 - 深粉色 */
    --error-container-rgb: 97, 32, 67;
    /* #612043 - 中深粉色 */
    --on-error-container-rgb: 255, 228, 238;
    /* #FFE4EE - 更淡的粉色 */

    --outline-rgb: 147, 145, 169;
    /* #9391A9 - 柔和的中灰紫色 */

    /* 深色主题变量 */
    --bg-color: #18172a;
    /* 更柔和的深蓝紫黑色背景 */
    --container-bg: #1c1a2e;
    /* 更柔和的深蓝紫色表面 */
    --text-color: rgb(var(--on-surface-rgb));

    --primary-color: rgb(var(--primary-rgb));
    --on-primary: rgb(var(--on-primary-rgb));
    --primary-container: rgb(var(--primary-container-rgb));
    --on-primary-container: rgb(var(--on-primary-container-rgb));

    --secondary-color: rgb(var(--secondary-rgb));
    --on-secondary: rgb(var(--on-secondary-rgb));
    --secondary-container: rgb(var(--secondary-container-rgb));
    --on-secondary-container: rgb(var(--on-secondary-container-rgb));

    --user-msg-bg: var(--primary-container);
    --user-msg-text: var(--on-primary-container);
    --assistant-msg-bg: rgb(var(--surface-variant-rgb));
    --assistant-msg-text: rgb(var(--on-surface-variant-rgb));
    --system-msg-bg: rgba(var(--on-surface-rgb), 0.08);
    --system-msg-text: rgba(var(--on-surface-rgb), 0.7);

    --error-color: rgb(var(--error-rgb));
    --on-error: rgb(var(--on-error-rgb));
    --error-container: rgb(var(--error-container-rgb));
    --on-error-container: rgb(var(--on-error-container-rgb));

    --border-color: rgba(var(--outline-rgb), 0.6);
    --input-bg: rgba(var(--surface-rgb), 0.8);
    --input-border: rgba(var(--outline-rgb), 0.3);

    --button-hover-bg: rgb(178, 171, 228);
    /* 更柔和的淡紫蓝色 */

    --sidebar-bg: #201e36;
    /* 更柔和的深蓝紫色 */

    --log-terminal-bg: #16152c;
    /* 更柔和的深蓝紫黑色 */
    --log-terminal-text: #d8d7ee;
    /* 更柔和的淡紫色文本 */
    --log-status-text: #a8a7c8;
    /* 日志状态文本 - 深色模式下使用中等亮度的紫色 */
    --log-status-error: #ff8aa5;
    /* 日志状态错误文本 - 深色模式下的错误颜色 */

    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.25), 0 5px 7px rgba(0, 0, 0, 0.18);

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(161, 153, 219, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.22), 0 2px 4px rgba(161, 153, 219, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.25), 0 4px 6px rgba(161, 153, 219, 0.08);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Noto Sans SC', 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    height: 100vh;
    overflow: hidden;
    font-size: 12px;
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* --- 工作区布局 --- */
.workspace-container {
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.chat-panel {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    background-color: var(--container-bg);
    transition: background-color var(--transition-speed);
    min-width: 300px;
    position: relative;
}

/* --- 侧边栏样式改进 --- */
.sidebar-panel {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--sidebar-bg);
    border-left: 1px solid var(--sidebar-border);
    transition: width 0.3s var(--transition-curve), min-width 0.3s var(--transition-curve), max-width 0.3s var(--transition-curve), padding 0.3s var(--transition-curve), background-color var(--transition-speed);
    flex-shrink: 0;
}

.sidebar-panel.collapsed {
    width: 0;
    min-width: 0;
    max-width: 0;
    padding: 0;
    border-left: none;
}

/* --- Sidebar Toggle Buttons (Unified Style) --- */
#toggleSidebarButton {
    position: absolute;
    right: 12px;
    top: 12px;
    z-index: 20;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: all 0.3s var(--transition-curve);
    opacity: 0.9;
}

#toggleSidebarButton:hover {
    opacity: 1;
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

#toggleSidebarButton:active {
    transform: scale(0.95);
}

#toggleSidebarButton svg {
    width: 18px;
    height: 18px;
    transition: transform 0.3s var(--transition-curve);
}

/* Rotate icon when right sidebar is open */
.sidebar-panel:not(.collapsed) ~ #toggleSidebarButton svg {
    transform: rotate(180deg);
}

#toggleSidebarButton:hover svg {
    transform: scale(1.1);
}

.sidebar-panel:not(.collapsed) ~ #toggleSidebarButton:hover svg {
    transform: rotate(180deg) scale(1.1);
}

/* --- 标题样式 --- */
h1 {
    color: var(--text-color);
    text-align: center;
    margin: 0;
    padding: 16px var(--content-padding);
    background-color: var(--container-bg);
    font-size: 1.4em;
    font-weight: 600;
    letter-spacing: -0.5px;
    flex-shrink: 0;
    border-bottom: 1px solid rgba(var(--outline-rgb), 0.1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Noto Sans SC', sans-serif;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    color: var(--primary-color);
}

/* Removed .title-separator and .subtitle as title is simpler now */

/* --- 链接样式 --- */
a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed);
}

a:hover {
    text-decoration: none;
    opacity: 0.85;
}

/* --- API密钥管理样式 --- */
.api-key-status {
    padding: 12px;
    border-radius: var(--border-radius-md);
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
}

.api-key-status.success {
    background-color: rgba(76, 175, 80, 0.1);
    border-color: rgba(76, 175, 80, 0.3);
    color: #2e7d32;
}

.api-key-status.error {
    background-color: var(--error-container);
    border-color: var(--error-color);
    color: var(--on-error-container);
}

.api-key-input-group {
    margin-bottom: 16px;
}

.api-key-input-container {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.api-key-input-container input {
    flex: 1;
}

.api-key-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.api-key-list {
    margin-top: 16px;
}

.api-key-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    margin-bottom: 8px;
    background-color: var(--input-bg);
    transition: background-color var(--transition-speed);
}

.api-key-item:hover {
    background-color: rgba(var(--primary-rgb), 0.05);
}

.api-key-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.api-key-value {
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--text-color);
    background-color: rgba(var(--outline-rgb), 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    word-break: break-all;
}

.api-key-meta {
    font-size: 0.8em;
    color: rgba(var(--on-surface-rgb), 0.7);
}

.api-key-actions-item {
    display: flex;
    gap: 8px;
}

.icon-button {
    background: var(--icon-button-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 8px;
    cursor: pointer;
    color: var(--icon-button-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-button:hover {
    background-color: var(--icon-button-hover-bg);
    color: var(--primary-color);
}

.icon-button.danger:hover {
    background-color: rgba(var(--error-rgb), 0.1);
    color: var(--error-color);
}

/* --- 消息样式增强 --- */
#chatbox {
    flex-grow: 1;
    overflow-y: auto;
    padding: var(--content-padding);
    display: flex;
    flex-direction: column;
    gap: 16px;
    background-color: var(--bg-color);
    transition: background-color var(--transition-speed);
    width: 100%;
    box-sizing: border-box;
}

.message {
    padding: 16px 18px;
    border-radius: var(--border-radius-lg);
    max-width: 85%;
    word-wrap: break-word;
    line-height: 1.6;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
    position: relative;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

.message:hover {
    box-shadow: var(--shadow-md);
}

.user-message {
    background-color: var(--user-msg-bg);
    color: var(--user-msg-text);
    align-self: flex-end;
    margin-left: auto;
    border-radius: var(--border-radius-lg) var(--border-radius-sm) var(--border-radius-lg) var(--border-radius-lg);
    border-color: rgba(var(--primary-container-rgb), 0.5);
}

.assistant-message {
    background-color: var(--assistant-msg-bg);
    color: var(--assistant-msg-text);
    align-self: flex-start;
    margin-right: auto;
    white-space: pre-wrap;
    border-radius: var(--border-radius-sm) var(--border-radius-lg) var(--border-radius-lg) var(--border-radius-lg);
    border-color: rgba(var(--surface-variant-rgb), 0.5);
}

.system-message {
    color: var(--system-msg-text);
    font-size: 0.92em;
    text-align: center;
    padding: 10px 14px;
    margin: 8px auto;
    max-width: 80%;
    background-color: var(--system-msg-bg);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(var(--outline-rgb), 0.2);
    box-shadow: none;
}

.error-message {
    background-color: var(--error-container);
    color: var(--on-error-container);
    align-self: stretch;
    text-align: center;
    padding: 12px 18px;
    border-radius: var(--border-radius-md);
    margin: 10px 5%;
    box-shadow: none;
    border: 1px solid rgba(var(--error-rgb), 0.2);
}

/* --- 输入区域样式增强 --- */
#input-area {
    display: flex;
    padding: 12px var(--content-padding);
    border-top: 1px solid rgba(var(--outline-rgb), 0.1);
    flex-shrink: 0;
    gap: 10px;
    align-items: flex-end;
    background-color: var(--container-bg);
    flex-wrap: wrap;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.02);
    transition: background-color var(--transition-speed);
    width: 100%;
    box-sizing: border-box;
}

/* 模型选择器样式 */
.model-selector-container {
    flex-basis: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.model-selector-label {
    flex-shrink: 0;
    font-size: 0.9em;
    color: var(--text-color);
    opacity: 0.85;
}

#modelSelector {
    flex-grow: 1;
    padding: 8px 12px;
    border-radius: var(--border-radius-md);
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    font-family: inherit;
    font-size: 0.9em;
    outline: none;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

#modelSelector:focus {
    border-color: var(--input-focus-border);
    box-shadow: var(--input-focus-shadow);
}

#modelSelector option {
    background-color: var(--input-bg);
    color: var(--text-color);
}

#refreshModelsButton {
    background-color: rgba(var(--primary-rgb), 0.1);
    color: var(--primary-color);
    border: none;
    padding: 8px 12px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-size: 0.9em;
    transition: background-color var(--transition-speed);
}

#refreshModelsButton:hover {
    background-color: rgba(var(--primary-rgb), 0.15);
}

#userInput {
    flex-grow: 1;
    flex-basis: 300px;
    padding: 14px 18px;
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius-xl);
    resize: none;
    font-family: inherit;
    font-size: 1em;
    min-height: 48px;
    max-height: 200px;
    overflow-y: auto;
    line-height: 1.5;
    outline: none;
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed), background-color var(--transition-speed);
    min-width: 180px;
    /* MODIFIED: Prevents excessive shrinking before wrap */
}

#userInput:focus {
    border-color: var(--input-focus-border);
    box-shadow: var(--input-focus-shadow);
}

/* --- 按钮样式增强 --- */
.action-button {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-xl);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95em;
    font-weight: 500;
    transition: background-color var(--transition-speed), transform 0.1s, box-shadow var(--transition-speed), opacity var(--transition-speed);
    line-height: 1.5;
    height: 48px;
    align-self: flex-end;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
    letter-spacing: 0.3px;
}

.action-button:disabled {
    cursor: not-allowed;
    box-shadow: none;
    background-color: var(--button-disabled-bg);
    color: var(--button-disabled-text);
    transform: none;
    opacity: 0.7;
}

.action-button:hover:not(:disabled) {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
    opacity: 0.95;
}

.action-button:active:not(:disabled) {
    transform: translateY(0px);
    box-shadow: var(--shadow-sm);
}

#sendButton {
    background-color: var(--button-bg);
    color: var(--button-text);
}

#sendButton:hover:not(:disabled) {
    background-color: var(--button-hover-bg);
}

#clearButton {
    background-color: var(--clear-button-bg);
    color: var(--clear-button-text);
    order: 1;
    /* Default order: Send, Clear */
}

#clearButton:hover:not(:disabled) {
    background-color: var(--clear-button-hover-bg);
}

/* --- 图标按钮样式 --- */
.icon-button {
    background-color: var(--icon-button-bg);
    color: var(--icon-button-color);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2em;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    flex-shrink: 0;
}

.icon-button:hover:not(:disabled) {
    background-color: var(--icon-button-hover-bg);
    color: var(--primary-color);
}

.icon-button:disabled {
    color: var(--button-disabled-text);
    cursor: not-allowed;
    background-color: transparent;
    opacity: 0.5;
}

/* --- 服务器信息视图增强 --- */
#server-info-view {
    display: none;
    /* Initially hidden */
    flex-direction: column;
    /* MODIFIED: To ensure content flows correctly */
    padding: var(--content-padding);
    overflow-y: auto;
    height: 100%;
    background-color: var(--bg-color);
    transition: background-color var(--transition-speed);
}

.server-info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(var(--outline-rgb), 0.2);
    flex-shrink: 0;
    /* MODIFIED */
}

.server-info-header h3 {
    margin: 0;
    font-size: 1.25em;
    font-weight: 600;
    color: var(--text-color);
}

#refreshServerInfoButton {
    background-color: rgba(var(--primary-rgb), 0.1);
    color: var(--primary-color);
    border-radius: var(--border-radius-md);
    padding: 8px 16px;
    font-size: 0.9em;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

#refreshServerInfoButton:hover {
    background-color: rgba(var(--primary-rgb), 0.15);
}

.info-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--card-border);
    transition: box-shadow var(--transition-speed), background-color var(--transition-speed);
    flex-shrink: 0;
    /* MODIFIED */
}

.info-card:hover {
    box-shadow: var(--shadow-md);
}

.info-card h3 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-color);
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(var(--outline-rgb), 0.1);
}

#api-info-content,
#health-status-display {
    font-size: 0.95em;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-list div {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(var(--outline-rgb), 0.08);
}

.info-list div:last-child {
    border-bottom: none;
}

.info-list strong {
    min-width: 140px;
    color: var(--primary-color);
    font-weight: 500;
}

/* --- 导航样式增强 --- */
.main-nav {
    display: flex;
    padding: 12px var(--content-padding) 12px;
    background-color: var(--container-bg);
    border-bottom: 1px solid rgba(var(--outline-rgb), 0.1);
    gap: 12px;
    align-items: center;
    transition: background-color var(--transition-speed);
    flex-shrink: 0;
    /* MODIFIED */
}

.nav-button {
    padding: 8px 16px;
    border: none;
    background-color: transparent;
    color: var(--text-color);
    cursor: pointer;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    transition: background-color var(--transition-speed), color var(--transition-speed), box-shadow var(--transition-speed);
    line-height: 1.5;
    letter-spacing: 0.2px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Noto Sans SC', sans-serif;
}

.nav-icon {
    opacity: 0.8;
}

.nav-button:hover:not(.active) {
    background-color: rgba(var(--primary-rgb), 0.05);
}

.nav-button.active {
    color: var(--on-primary-container);
    font-weight: 600;
    background-color: var(--primary-container);
    box-shadow: var(--shadow-sm);
}

.nav-button.active .nav-icon {
    opacity: 1;
}

/* --- 主题切换按钮增强 --- */
#themeToggleButton {
    background-color: var(--theme-toggle-bg);
    border: 1px solid rgba(var(--outline-rgb), 0.3);
    color: var(--theme-toggle-color);
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 500;
    padding: 6px 6px;
    border-radius: var(--border-radius-xl);
    transition: background-color var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed);
    margin-left: auto;
    align-self: center;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}

#themeToggleButton:hover {
    background-color: var(--theme-toggle-hover-bg);
    border-color: var(--primary-color);
}

#themeToggleButton .theme-icon {
    width: 16px;
    height: 16px;
}

html:not(.dark-mode) #darkModeIcon {
    display: block;
}

html:not(.dark-mode) #lightModeIcon {
    display: none;
}

html.dark-mode #darkModeIcon {
    display: none;
}

html.dark-mode #lightModeIcon {
    display: block;
}

/* --- 日志区域样式增强 --- */
#log-area {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 0;
    border-top: none;
    background-color: var(--sidebar-bg);
    transition: background-color var(--transition-speed);
}

#log-area-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px var(--content-padding);
    font-weight: 600;
    color: var(--text-color);
    flex-shrink: 0;
    border-bottom: 1px solid rgba(var(--outline-rgb), 0.2);
    background-color: var(--container-bg);
    transition: background-color var(--transition-speed);
}

#clearLogButton {
    margin-left: 10px;
    font-size: 0.85em;
    padding: 6px 12px;
    height: auto;
    line-height: 1.4;
    border-radius: var(--border-radius-md);
    background-color: rgba(var(--secondary-rgb), 0.1);
    color: var(--secondary-color);
}

#clearLogButton:hover:not(:disabled) {
    background-color: rgba(var(--secondary-rgb), 0.15);
    color: var(--secondary-color);
}

#log-terminal-wrapper {
    flex-grow: 1;
    overflow: hidden;
    border: none;
    border-radius: 0;
    margin: 0;
    padding: 0;
    background-color: var(--log-terminal-bg);
}

#log-terminal {
    height: 100%;
    background-color: var(--log-terminal-bg);
    color: var(--log-terminal-text);
    font-family: "JetBrains Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
    font-size: 0.85em;
    padding: 12px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
    box-sizing: border-box;
}

.log-entry {
    margin-bottom: 4px;
    line-height: 1.4;
}

.log-status {
    font-size: 0.85em;
    margin-top: 0;
    padding: 10px;
    color: var(--log-status-text);
    /* 使用主题相关的变量 */
    flex-shrink: 0;
    background-color: var(--log-terminal-bg);
    border-top: 1px solid rgba(var(--outline-rgb), 0.3);
    text-align: center;
}

.log-status.error-status {
    color: var(--log-status-error);
}

/* --- View Container for Chat/Server Info --- */
.view-container {
    flex-grow: 1;
    overflow: hidden;
    display: flex;
    /* To manage child view visibility */
    flex-direction: column;
    /* Children stack, only one visible */
}

#chat-view {
    display: flex;
    /* Changed to row to accommodate left sidebar */
    flex-direction: row;
    height: 100%;
    overflow: hidden;
    position: relative;
}

/* --- Left Settings Sidebar --- */
.left-settings-sidebar {
    width: 320px;
    min-width: 320px;
    max-width: 320px;
    height: 100%;
    background-color: var(--surface-color);
    border-right: 1px solid rgba(var(--outline-rgb), 0.2);
    display: flex;
    flex-direction: column;
    transition: width 0.3s var(--transition-curve), min-width 0.3s var(--transition-curve), max-width 0.3s var(--transition-curve), padding 0.3s var(--transition-curve);
    overflow: hidden;
    flex-shrink: 0;
}

.left-settings-sidebar.collapsed {
    width: 0;
    min-width: 0;
    max-width: 0;
    padding: 0;
    border-right: none;
}

.settings-sidebar-header {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(var(--outline-rgb), 0.2);
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.settings-sidebar-header h3 {
    margin: 0;
    font-size: 1.1em;
    color: var(--text-color);
    font-weight: 600;
}

.settings-sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 16px;
}

.settings-sidebar-content .info-card {
    margin-bottom: 16px;
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    padding: 16px;
    border: 1px solid rgba(var(--outline-rgb), 0.1);
}

.settings-sidebar-content .info-card h3 {
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 1em;
    color: var(--text-color);
    font-weight: 600;
}

.settings-sidebar-content .info-card:last-child {
    margin-bottom: 0;
}

/* --- Chat Main Area --- */
.chat-main-area {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    min-width: 300px; /* Ensure minimum usable width */
    position: relative;
}

/* --- Left Sidebar Toggle Button --- */
.left-sidebar-toggle {
    position: absolute;
    left: 12px;
    top: 12px;
    z-index: 20;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: all 0.3s var(--transition-curve);
    opacity: 0.9;
}

.left-sidebar-toggle:hover {
    opacity: 1;
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.left-sidebar-toggle:active {
    transform: scale(0.95);
}

.left-sidebar-toggle svg {
    width: 18px;
    height: 18px;
    transition: transform 0.3s var(--transition-curve);
}

/* Rotate icon when sidebar is open */
.left-settings-sidebar:not(.collapsed) ~ .chat-main-area .left-sidebar-toggle svg {
    transform: rotate(45deg);
}

.left-sidebar-toggle:hover svg {
    transform: scale(1.1);
}

.left-settings-sidebar:not(.collapsed) ~ .chat-main-area .left-sidebar-toggle:hover svg {
    transform: rotate(45deg) scale(1.1);
}


/* --- 代码块样式增强 --- */
.message pre {
    background-color: rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(var(--outline-rgb), 0.2);
    border-radius: var(--border-radius-sm);
    padding: 12px 16px;
    margin: 12px 0;
    overflow-x: auto;
    font-family: "JetBrains Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
    font-size: 0.9em;
}

.message code:not(pre > code) {
    background-color: rgba(var(--primary-rgb), 0.08);
    padding: 2px 5px;
    border-radius: 4px;
    font-family: "JetBrains Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
    font-size: 0.9em;
    color: var(--primary-color);
}

html.dark-mode .message pre {
    background-color: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.1);
}

html.dark-mode .message code:not(pre > code) {
    background-color: rgba(var(--primary-rgb), 0.15);
}

/* --- 响应式增强 --- */
/* When left sidebar is open, make buttons more compact */
.left-settings-sidebar:not(.collapsed) ~ .chat-main-area #input-area {
    gap: 8px;
}

.left-settings-sidebar:not(.collapsed) ~ .chat-main-area .action-button {
    padding: 10px 18px;
    font-size: 0.9em;
}

.left-settings-sidebar:not(.collapsed) ~ .chat-main-area #userInput {
    flex-basis: 200px;
    min-width: 150px;
}

/* When right sidebar is open, adjust chat panel */
.chat-panel {
    transition: all 0.3s var(--transition-curve);
}

/* Responsive adjustments for sidebar widths */
@media (max-width: 1400px) {
    .left-settings-sidebar {
        width: 280px;
        min-width: 280px;
        max-width: 280px;
    }

    .sidebar-panel {
        width: 320px;
        min-width: 320px;
        max-width: 320px;
    }
}

@media (max-width: 1200px) {
    /* When both sidebars are open on smaller screens, make controls even more compact */
    .left-settings-sidebar:not(.collapsed) ~ .chat-main-area .action-button {
        padding: 8px 14px;
        font-size: 0.85em;
    }

    .left-settings-sidebar:not(.collapsed) ~ .chat-main-area #userInput {
        flex-basis: 150px;
        min-width: 120px;
    }
}

@media (max-width: 768px) {

    #userInput {
        min-height: 44px;
        flex-grow: 1;
        /* ADDED */
        flex-basis: 0;
        /* ADDED */
        min-width: 120px;
        /* ADDED/ADJUSTED */
    }

    .action-button {
        padding: 10px 16px;
        height: 44px;
        font-size: 0.95em;
    }

    .message {
        max-width: 90%;
    }

    h1 {
        font-size: 1.2em;
        padding: 14px 16px;
    }

    .info-card {
        padding: 16px;
    }

    /* On mobile, collapse both sidebars by default and make them narrower when open */
    .left-settings-sidebar {
        width: 0;
        min-width: 0;
        max-width: 0;
    }

    .left-settings-sidebar:not(.collapsed) {
        width: 280px;
        min-width: 280px;
        max-width: 280px;
    }

    .sidebar-panel {
        width: 0;
        min-width: 0;
        max-width: 0;
    }

    .sidebar-panel:not(.collapsed) {
        width: 300px;
        min-width: 300px;
        max-width: 300px;
    }
}

@media (max-width: 280px) {
    body {
        font-size: 12px;
    }

    #chatbox {
        gap: 12px;
        padding: 12px;
    }

    .message {
        padding: 12px 14px;
    }

    .action-button {
        width: 100%;
        margin-bottom: 4px;
    }

    #clearButton {
        order: 0;
        /* Clear button first on small screens */
    }

    #sendButton {
        order: 1;
        /* Send button second */
    }

    .main-nav {
        padding: 8px 12px;
        flex-wrap: wrap;
        /* Allow nav buttons to wrap if too many/long */
    }

    .nav-button {
        padding: 6px 12px;
        font-size: 0.9em;
    }

    #themeToggleButton {
        /* Ensure theme toggle doesn't cause overflow */
        margin-left: auto;
        flex-shrink: 0;
    }

    .info-card {
        padding: 12px;
        margin-bottom: 16px;
    }

    .info-list strong {
        min-width: 100%;
        /* Stack key/value on small screens */
        margin-bottom: 4px;
        display: block;
    }

    .info-list div {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* --- 闪烁光标动画 --- */
.assistant-message.streaming::after {
    content: '|';
    animation: blink 1s step-end infinite;
    margin-left: 2px;
    display: inline-block;
    font-weight: bold;
    position: relative;
    top: -1px;
    opacity: 0.7;
}

@keyframes blink {

    from,
    to {
        opacity: 0.7;
    }

    50% {
        opacity: 0;
    }
}

/* --- 加载指示器样式 --- */
.loading-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    color: var(--system-msg-text);
    flex-direction: column;
    gap: 12px;
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(var(--primary-rgb), 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
    margin-bottom: 8px;
}

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

/* --- 卡片内容动画 --- */
.info-card {
    animation: fadeIn 0.3s ease-out;
    /* Duplicates from above, ensure consistency or remove if redundant */
}

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

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

/* --- 美化信息列表 --- */
.info-list {
    background-color: rgba(var(--surface-rgb), 0.5);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.info-list div {
    padding: 10px 16px;
    transition: background-color var(--transition-speed);
    /* display, flex-wrap, gap, border-bottom already defined */
}

.info-list div:last-child {
    border-bottom: none;
}

.info-list div:hover {
    background-color: rgba(var(--primary-rgb), 0.03);
}

/* info-list strong already defined */

/* --- 代码标签增强 --- */
code {
    /* General code tag style, distinct from .message code */
    font-family: "JetBrains Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
    background-color: rgba(var(--on-surface-rgb), 0.05);
    /* More neutral for general code */
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--on-surface-variant-rgb);
}

html.dark-mode code {
    background-color: rgba(var(--on-surface-rgb), 0.1);
}


/* --- 按钮动画增强 --- */
.action-button {
    position: relative;
    overflow: hidden;
}

.action-button:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.4);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.action-button:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }

    20% {
        transform: scale(25, 25);
        opacity: 0.3;
    }

    100% {
        opacity: 0;
        transform: scale(40, 40);
    }
}

/* --- 聊天区域滚动条美化 --- */
#chatbox::-webkit-scrollbar,
#log-terminal::-webkit-scrollbar,
/* Apply to log terminal too */
#server-info-view::-webkit-scrollbar

/* And server info view */
    {
    width: 8px;
}

#chatbox::-webkit-scrollbar-track,
#log-terminal::-webkit-scrollbar-track,
#server-info-view::-webkit-scrollbar-track {
    background: transparent;
}

#chatbox::-webkit-scrollbar-thumb,
#log-terminal::-webkit-scrollbar-thumb,
#server-info-view::-webkit-scrollbar-thumb {
    background-color: rgba(var(--outline-rgb), 0.2);
    border-radius: 20px;
}

/* Add border to scrollbar thumb for better visibility against content */
#chatbox::-webkit-scrollbar-thumb {
    border: 2px solid var(--bg-color);
}

#log-terminal::-webkit-scrollbar-thumb {
    border: 2px solid var(--log-terminal-bg);
}

#server-info-view::-webkit-scrollbar-thumb {
    border: 2px solid var(--bg-color);
}


#chatbox::-webkit-scrollbar-thumb:hover,
#log-terminal::-webkit-scrollbar-thumb:hover,
#server-info-view::-webkit-scrollbar-thumb:hover {
    background-color: rgba(var(--outline-rgb), 0.3);
}

/* --- 用户输入框滚动条 --- */
#userInput::-webkit-scrollbar {
    width: 6px;
}

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

#userInput::-webkit-scrollbar-thumb {
    background-color: rgba(var(--outline-rgb), 0.2);
    border-radius: 10px;
    border: 2px solid var(--input-bg);
}

#userInput::-webkit-scrollbar-thumb:hover {
    background-color: rgba(var(--outline-rgb), 0.3);
}

/* --- 加强主题切换按钮样式 --- */
#themeToggleButton {
    display: flex;
    align-items: center;
    gap: 6px;
    position: relative;
}

/* 删除之前使用emoji的样式，使用SVG图标替代 */

/* --- 模型设置页面样式 --- */
#model-settings-view {
    display: none;
    /* Initially hidden */
    flex-direction: column;
    padding: var(--content-padding);
    overflow-y: auto;
    height: 100%;
    background-color: var(--bg-color);
    transition: background-color var(--transition-speed);
}

/* Force hide class for thinking controls - used by JavaScript for flash models */
.thinking-controls-hidden {
    display: none !important;
    visibility: hidden !important;
    height: 0 !important;
    overflow: hidden !important;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
}

.settings-group {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(var(--outline-rgb), 0.1);
}

.settings-group:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.settings-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.settings-description {
    font-size: 0.85em;
    color: rgba(var(--on-surface-rgb), 0.7);
    margin-top: 8px;
    line-height: 1.4;
}

.settings-slider-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.settings-slider {
    flex-grow: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(var(--outline-rgb), 0.2);
    border-radius: 3px;
    outline: none;
}

.settings-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

.settings-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: background-color var(--transition-speed);
    border: none;
}

.settings-number {
    width: 60px;
    padding: 6px 8px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 0.9em;
    text-align: center;
}

.settings-textarea {
    width: 100%;
    min-height: 100px;
    padding: 12px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 0.95em;
    resize: vertical;
    transition: border-color var(--transition-speed);
}

.settings-textarea:focus,
.settings-number:focus,
.settings-input:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: var(--input-focus-shadow);
}

.settings-input {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 0.95em;
}

.settings-status {
    text-align: center;
    color: rgba(var(--on-surface-rgb), 0.8);
    margin-bottom: 15px;
    font-size: 0.9em;
}

.full-width-button {
    width: 100%;
    margin-top: 10px;
}