/**
 * Liquid Glass UI - iOS 26 / macOS 26 风格
 * WebAI Chat System
 */

:root {
    /* 玻璃效果色彩系统 */
    --glass-bg: rgba(255, 255, 255, 0.12);
    --glass-bg-hover: rgba(255, 255, 255, 0.18);
    --glass-bg-active: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-shadow: rgba(0, 0, 0, 0.15);

    /* 文字颜色 */
    --text-primary: rgba(255, 255, 255, 0.95);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);

    /* 强调色 */
    --accent-blue: rgba(0, 122, 255, 0.9);
    --accent-blue-light: rgba(0, 122, 255, 0.6);
    --accent-green: rgba(52, 199, 89, 0.9);
    --accent-red: rgba(255, 59, 48, 0.9);
    --accent-orange: rgba(255, 149, 0, 0.9);
    --accent-purple: rgba(175, 82, 222, 0.9);

    /* 消息气泡 */
    --bubble-user: rgba(0, 122, 255, 0.85);
    --bubble-assistant: rgba(255, 255, 255, 0.1);
    --bubble-system: rgba(255, 255, 255, 0.06);

    /* 模糊强度 */
    --blur-heavy: 40px;
    --blur-medium: 25px;
    --blur-light: 15px;

    /* 超大圆角 - Liquid Glass 特征 */
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --radius-xs: 8px;
    --radius-full: 9999px;

    /* 过渡动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* 布局尺寸 */
    --sidebar-width: 300px;
    --header-height: 60px;
}

/* 基础重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow: hidden;
}

/* 动态渐变背景 - Liquid Glass 特效 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 15% 15%, rgba(120, 119, 198, 0.35) 0%, transparent 50%),
        radial-gradient(ellipse at 85% 85%, rgba(255, 119, 198, 0.25) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(66, 165, 245, 0.15) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite alternate;
}

@keyframes backgroundShift {
    0% { opacity: 1; }
    50% { opacity: 0.8; }
    100% { opacity: 1; }
}

/* 玻璃容器基础类 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-heavy));
    -webkit-backdrop-filter: blur(var(--blur-heavy));
    border-radius: var(--radius-xl);
    border: 1px solid var(--glass-border);
    box-shadow:
        0 8px 32px var(--glass-shadow),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.glass-light {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-light));
    -webkit-backdrop-filter: blur(var(--blur-light));
    border-radius: var(--radius-md);
}

/* 液态高光效果 */
.glass::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    pointer-events: none;
}

/* ========== 主布局 ========== */
.app-container {
    display: flex;
    height: 100vh;
    width: 100%;
    overflow: hidden;
}

/* ========== 侧边栏 ========== */
.sidebar {
    width: var(--sidebar-width);
    height: 100%;
    display: flex;
    flex-direction: column;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-heavy));
    -webkit-backdrop-filter: blur(var(--blur-heavy));
    border-right: 1px solid var(--glass-border);
    position: relative;
}

.sidebar-header {
    height: var(--header-height);
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--glass-border);
}

.sidebar-header h1 {
    font-size: 18px;
    font-weight: 600;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-actions {
    display: flex;
    gap: 8px;
}

/* 搜索框 */
.search-box {
    padding: 12px 16px;
}

.search-input {
    width: 100%;
    padding: 10px 16px;
    background: rgba(255, 255, 255, 0.08);
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: var(--transition-fast);
}

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

.search-input:focus {
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 2px var(--accent-blue-light);
}

/* 对话列表 */
.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.conversation-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    margin-bottom: 4px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.conversation-item:hover {
    background: var(--glass-bg-hover);
}

.conversation-item.active {
    background: var(--glass-bg-active);
}

.conversation-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.conversation-info {
    flex: 1;
    margin-left: 12px;
    min-width: 0;
}

.conversation-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-preview {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

.conversation-time {
    font-size: 11px;
    color: var(--text-tertiary);
}

.conversation-actions {
    display: none;
    gap: 4px;
}

.conversation-item:hover .conversation-actions {
    display: flex;
}

.conversation-item:hover .conversation-time {
    display: none;
}

/* 用户信息区 */
.user-section {
    padding: 16px;
    border-top: 1px solid var(--glass-border);
}

.user-card {
    display: flex;
    align-items: center;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    color: white;
}

.user-info {
    flex: 1;
    margin-left: 12px;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
}

.user-level {
    font-size: 12px;
    color: var(--text-secondary);
}

.usage-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
}

.usage-bar-fill {
    height: 100%;
    background: var(--accent-blue);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* ========== 主聊天区域 ========== */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-width: 0;
    position: relative;
}

/* 聊天头部 */
.chat-header {
    height: var(--header-height);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-medium));
    -webkit-backdrop-filter: blur(var(--blur-medium));
    border-bottom: 1px solid var(--glass-border);
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-header-title {
    font-size: 16px;
    font-weight: 600;
}

.model-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-fast);
}

.model-selector:hover {
    background: rgba(255, 255, 255, 0.15);
}

.model-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
}

.model-name {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 消息区域 */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 消息气泡 */
.message {
    max-width: 75%;
    animation: messageIn 0.3s ease;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

/* 消息头像 */
.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.user-avatar-msg {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: white;
    font-weight: 600;
    font-size: 14px;
}

.ai-avatar-msg {
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-blue) 100%);
    font-size: 18px;
}

.message-content-wrapper {
    flex: 1;
    min-width: 0;
}

@keyframes messageIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

.message.system {
    align-self: center;
    max-width: 85%;
}

.message-bubble {
    padding: 12px 18px;
    border-radius: var(--radius-lg);
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    position: relative;
    line-height: 1.6;
    max-width: 100%;
    overflow: hidden;
}

.message.user .message-bubble {
    background: var(--bubble-user);
    border-bottom-right-radius: var(--radius-xs);
}

.message.assistant .message-bubble {
    background: var(--bubble-assistant);
    backdrop-filter: blur(var(--blur-medium));
    -webkit-backdrop-filter: blur(var(--blur-medium));
    border-bottom-left-radius: var(--radius-xs);
}

.message.system .message-bubble {
    background: var(--bubble-system);
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
    padding: 8px 16px;
}

.message-content {
    font-size: 15px;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
}

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

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

/* 代码块样式 */
.message-content pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    overflow-x: auto;
    margin: 8px 0;
}

.message-content code {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
}

.message-content :not(pre) > code {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

.message-time {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 6px;
    text-align: right;
}

.message.assistant .message-time {
    text-align: left;
}

.message-actions {
    display: none;
    gap: 8px;
    margin-top: 8px;
}

.message:hover .message-actions {
    display: flex;
}

/* 打字指示器 */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 18px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-tertiary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-8px);
        opacity: 1;
    }
}

/* 输入区域 */
.chat-input-area {
    padding: 16px 24px 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-medium));
    -webkit-backdrop-filter: blur(var(--blur-medium));
    border-top: 1px solid var(--glass-border);
}

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

.input-tools {
    display: flex;
    gap: 8px;
}

.input-wrapper {
    flex: 1;
    display: flex;
    align-items: flex-end;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    padding: 4px;
    transition: var(--transition-fast);
}

.input-wrapper:focus-within {
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 0 2px var(--accent-blue-light);
}

.chat-input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 15px;
    padding: 10px 16px;
    resize: none;
    outline: none;
    max-height: 150px;
    min-height: 40px;
    line-height: 1.5;
}

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

.send-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: var(--accent-blue);
    color: white;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.4);
}

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

.stop-btn {
    background: var(--accent-red);
}

/* ========== 空状态 ========== */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
}

.empty-state-icon {
    font-size: 72px;
    margin-bottom: 24px;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.empty-state-desc {
    font-size: 15px;
    color: var(--text-secondary);
    max-width: 320px;
    margin-bottom: 24px;
}

/* ========== 按钮样式 ========== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

.btn-primary:hover {
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-danger {
    background: var(--accent-red);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.icon-btn {
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* ========== 模态框 ========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    background: rgba(30, 30, 40, 0.95);
    backdrop-filter: blur(var(--blur-heavy));
    -webkit-backdrop-filter: blur(var(--blur-heavy));
    border-radius: var(--radius-xl);
    border: 1px solid var(--glass-border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    transform: scale(0.9) translateY(20px);
    transition: var(--transition-normal);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* ========== 表单元素 ========== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: var(--transition-fast);
}

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

.form-input:focus {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
}

.form-input.error {
    border-color: var(--accent-red);
}

.form-error {
    font-size: 12px;
    color: var(--accent-red);
    margin-top: 6px;
}

.form-hint {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 6px;
}

/* 开关按钮 */
.switch {
    position: relative;
    width: 48px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 14px;
    transition: var(--transition-fast);
}

.switch-slider::before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-fast);
}

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

.switch input:checked + .switch-slider::before {
    transform: translateX(20px);
}

/* Tab 标签页 */
.tabs {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.tab {
    flex: 1;
    padding: 10px 16px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.tab.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
}

/* ========== Toast 提示 ========== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 12px 20px;
    background: rgba(30, 30, 40, 0.95);
    backdrop-filter: blur(var(--blur-medium));
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px var(--glass-shadow);
    animation: toastIn 0.3s ease;
    max-width: 360px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast.success {
    border-left: 3px solid var(--accent-green);
}

.toast.error {
    border-left: 3px solid var(--accent-red);
}

.toast.warning {
    border-left: 3px solid var(--accent-orange);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========== 加载动画 ========== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========== 滚动条样式 ========== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 80%;
        --header-height: 56px;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
        transition: var(--transition-normal);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .chat-header {
        padding: 0 16px;
    }

    .chat-messages {
        padding: 16px;
    }

    .chat-input-area {
        padding: 12px 16px 16px;
    }

    .message {
        max-width: 85%;
    }

    .modal {
        width: 95%;
        max-height: 85vh;
    }
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
}

/* ========== 认证页面 ========== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    padding: 40px;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 24px 0;
    color: var(--text-tertiary);
    font-size: 13px;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}

.guest-btn {
    width: 100%;
    padding: 14px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px dashed var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.guest-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

/* ========== 下拉菜单 ========== */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    min-width: 180px;
    background: rgba(30, 30, 40, 0.98);
    backdrop-filter: blur(var(--blur-heavy));
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
    z-index: 100;
    overflow: hidden;
}

.dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.dropdown-item.danger {
    color: var(--accent-red);
}

.dropdown-divider {
    height: 1px;
    background: var(--glass-border);
    margin: 4px 0;
}

/* ========== 徽章 ========== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-full);
}

.badge-primary {
    background: rgba(0, 122, 255, 0.2);
    color: var(--accent-blue);
}

.badge-success {
    background: rgba(52, 199, 89, 0.2);
    color: var(--accent-green);
}

.badge-warning {
    background: rgba(255, 149, 0, 0.2);
    color: var(--accent-orange);
}

.badge-danger {
    background: rgba(255, 59, 48, 0.2);
    color: var(--accent-red);
}

/* ========== 工具提示 ========== */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    font-size: 12px;
    white-space: nowrap;
    border-radius: var(--radius-sm);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    pointer-events: none;
    margin-bottom: 8px;
}

[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
}