/* 现代化安全传输应用样式 - 增强版 */

/* CSS变量定义 - 现代化色彩系统 */
:root {
    /* 主色调 - 蓝色科技感 */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    /* 成功色 - 绿色 */
    --success-50: #f0fdf4;
    --success-100: #dcfce7;
    --success-500: #22c55e;
    --success-600: #16a34a;
    --success-700: #15803d;

    /* 警告色 - 琥珀色 */
    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-500: #f59e0b;
    --warning-600: #d97706;

    /* 错误色 - 红色 */
    --danger-50: #fef2f2;
    --danger-100: #fee2e2;
    --danger-500: #ef4444;
    --danger-600: #dc2626;
    --danger-700: #b91c1c;

    /* 中性色 - 现代灰度 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* 浅色模式变量 */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --bg-card: #ffffff;
    --bg-elevated: #ffffff;

    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-500);
    --text-muted: var(--gray-400);

    --border-primary: var(--gray-200);
    --border-secondary: var(--gray-100);
    --border-focus: var(--primary-500);

    /* 主题色 */
    --primary-color: var(--primary-600);
    --primary-hover: var(--primary-700);
    --success-color: var(--success-600);
    --danger-color: var(--danger-600);
    --warning-color: var(--warning-600);

    /* 现代化设计参数 - 优化圆角 */
    --border-radius-sm: 8px;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 24px;
    --border-radius-2xl: 32px;

    /* 现代阴影系统 - 增强层次感 */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
    --shadow-colored: 0 10px 25px -5px rgba(59, 130, 246, 0.1), 0 8px 10px -6px rgba(59, 130, 246, 0.1);

    /* 现代过渡效果 - 更流畅的动画 */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --transition-elastic: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* 现代字体系统 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: ui-monospace, 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;

    /* 间距系统 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
}

/* 深色模式变量 - 增强对比度 */
[data-theme="dark"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #151515;
    --bg-tertiary: #212121;
    --bg-card: #161616;
    --bg-elevated: #1f1f1f;

    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-tertiary: #808080;
    --text-muted: #5a5a5a;

    --border-primary: #333333;
    --border-secondary: #2a2a2a;
    --border-focus: var(--primary-400);

    /* 深色模式下的阴影 - 更加明显 */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.4);
    --shadow-colored: 0 10px 25px -5px rgba(59, 130, 246, 0.2), 0 8px 10px -6px rgba(59, 130, 246, 0.2);
}

/* 基础重置和现代化基础样式 */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    transition: var(--transition);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* 现代滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: 3px;
    transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* 图标样式 */
.icon {
    width: 20px;
    height: 20px;
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
}

/* 现代化按钮系统 - 简化版 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    user-select: none;
    outline: none;
    min-height: 44px;
    backdrop-filter: blur(10px);
}

.btn:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* 按钮变体 - 简化版 */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    filter: brightness(1.05);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-card));
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-elevated));
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    color: var(--primary-color);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-500), var(--danger-600));
    color: white;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    filter: brightness(1.05);
}

.btn-icon {
    padding: var(--space-3);
    min-height: 44px;
    min-width: 44px;
    border-radius: var(--border-radius);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    border: 1px solid var(--border-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.btn-icon:hover {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

/* 页头现代化设计 - 增强视觉层次 */
.header {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 255, 255, 0.8) 100%);
    border-bottom: 1px solid var(--border-primary);
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
}

[data-theme="dark"] .header {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(26, 26, 26, 0.9) 100%);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: 28px;
    font-weight: 800;
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600), var(--primary-700));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.logo-badge {
    background: linear-gradient(135deg, var(--warning-500), var(--warning-600));
    color: white;
    font-size: 12px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
    margin-left: var(--space-2);
    animation: float 3s ease-in-out infinite;
}

/* Remove blue underline sweep effect on logo to avoid distracting top stripe */
.logo::after { content: none; }
.logo:hover::after { width: 0; }

.logo:hover {
    filter: brightness(1.1);
}

.logo:hover .logo-badge {
    animation: pulse 0.6s ease;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.logo .icon {
    width: 28px;
    height: 28px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* 现代化房间信息组件 - 增强交互效果 */
.room-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-card));
    padding: var(--space-4) var(--space-5);
    border-radius: var(--border-radius-2xl);
    border: 1px solid var(--border-secondary);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: visible;
    transition: var(--transition);
}

/* Remove top sweeping blue bar effect over room-info */
.room-info::before { content: none; }
.room-info:hover::before { left: -100%; }

.room-info:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.room-label {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
}

.room-id-input {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid transparent;
    outline: none;
    min-width: 220px;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--border-radius);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.room-id-input:focus {
    background: var(--bg-primary);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.room-id-input::placeholder {
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-weight: normal;
    font-style: italic;
}

.room-buttons {
    display: flex;
    gap: var(--space-1);
    position: relative;
    z-index: 1;
}

.room-buttons .btn-icon {
    position: relative;
}

/* 主内容区域现代化 */
.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    min-height: calc(100vh - 80px);
}

/* 信息横幅现代化 - 增强视觉吸引力 */
.info-banner {
    background: linear-gradient(135deg, var(--warning-50), rgba(245, 158, 11, 0.08), var(--warning-100));
    border: 1px solid var(--warning-200);
    border-radius: var(--border-radius-2xl);
    padding: var(--space-5) var(--space-8);
    display: flex;
    align-items: center;
    gap: var(--space-5);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

[data-theme="dark"] .info-banner {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05), rgba(245, 158, 11, 0.15));
    border-color: rgba(245, 158, 11, 0.3);
}

.info-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left 0.8s ease;
}

.info-banner:hover::before {
    left: 100%;
}

.info-banner:hover {
    box-shadow: var(--shadow-lg);
}

.info-banner .icon {
    color: var(--warning-600);
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    filter: drop-shadow(0 2px 4px rgba(245, 158, 11, 0.3));
}

/* 已移除第二个pulse动画 */

.info-banner span {
    flex: 1;
    font-size: 16px;
    line-height: 1.6;
    font-weight: 500;
}

.dismiss-btn {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: var(--space-1);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    flex-shrink: 0;
}

.dismiss-btn:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--text-primary);
}

[data-theme="dark"] .dismiss-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.info-banner.hidden {
    display: none;
}

/* 内容包装器现代化 */
.content-wrapper {
    display: grid;
    grid-template-columns: 1fr minmax(320px, 380px);
    gap: var(--space-8);
    flex: 1;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    min-width: 0;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

/* 现代化面板设计 - 简化版 */
.panel {
    background: linear-gradient(145deg, var(--bg-card) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    backdrop-filter: blur(20px);
}

[data-theme="dark"] .panel {
    background: linear-gradient(145deg, var(--bg-card) 0%, rgba(0, 0, 0, 0.1) 100%);
    border-color: var(--border-primary);
}

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

/* 面板标题 - 增强文字效果 */
.panel-title {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.panel-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
    border-radius: 2px;
    transition: width 0.3s ease;
}

.panel:hover .panel-title::after {
    width: 80px;
}

.panel-title .icon {
    width: 28px;
    height: 28px;
    color: var(--primary-color);
    filter: drop-shadow(0 2px 4px rgba(59, 130, 246, 0.3));
}

/* 历史记录面板 */
/* 历史记录面板 - 重新设计 */
.history-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    margin-bottom: var(--space-4);
}

.history-panel:hover {
    box-shadow: var(--shadow-sm);
}

/* 历史记录头部 - 简洁设计 */
.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
    border-bottom: 2px solid var(--border-secondary);
}

.history-header .panel-title {
    margin-bottom: 0;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.history-header .panel-title .icon {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

.history-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* 统计信息现代化 */
.stats-mini {
    display: flex;
    gap: var(--space-4);
    align-items: center;
}

.stat-mini {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--bg-elevated);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-secondary);
    transition: var(--transition);
}

.stat-mini:hover {
    border-color: var(--border-focus);
}

.stat-mini .icon {
    width: 16px;
    height: 16px;
    color: var(--primary-color);
}

.stat-mini span {
    font-weight: 600;
    color: var(--text-primary);
}

/* 历史记录列表 - 优化滚动 */
.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-height: 500px;
    overflow-y: auto;
    padding-right: var(--space-2);
    scrollbar-width: thin;
    scrollbar-color: var(--border-primary) transparent;
}

.history-list::-webkit-scrollbar {
    width: 6px;
}

.history-list::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 3px;
}

.history-list::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: 3px;
}

.history-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* 空状态 */
.history-list:empty::before {
    content: '📄 还没有聊天记录，开始传输文件或发送消息吧！';
    display: block;
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: var(--space-8);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 2px dashed var(--border-secondary);
}

/* 历史记录项现代化 - 卡片式设计 */
.history-item {
    padding: var(--space-5);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius);
    background: var(--bg-elevated);
    transition: var(--transition);
    position: relative;
    margin-bottom: var(--space-3);
    border-left: 4px solid transparent;
}

.history-item:hover {
    box-shadow: var(--shadow-sm);
    background: var(--bg-tertiary);
    border-color: var(--border-focus);
}

.history-item.message {
    border-left-color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-50), rgba(59, 130, 246, 0.02));
}

[data-theme="dark"] .history-item.message {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(59, 130, 246, 0.02));
}

.history-item.file {
    border-left-color: var(--success-color);
    background: linear-gradient(135deg, var(--success-50), rgba(34, 197, 94, 0.02));
}

[data-theme="dark"] .history-item.file {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.08), rgba(34, 197, 94, 0.02));
}

/* 历史记录项内容结构 */
.item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-3);
    gap: var(--space-3);
}

.item-type {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
    background: var(--bg-secondary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--border-radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.item-type .icon {
    width: 14px;
    height: 14px;
}

.item-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
}

.item-time {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: var(--space-2);
    font-style: italic;
}

.item-content {
    color: var(--text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.5;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.3);
    padding: var(--space-3);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-secondary);
    font-family: var(--font-mono);
}

[data-theme="dark"] .item-content {
    background: rgba(0, 0, 0, 0.2);
}

/* 文件信息特殊样式 */
.history-item.file .item-content {
    background: var(--bg-secondary);
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.file-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex: 1;
}

.file-size {
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
}

/* 消息输入面板现代化 */
.message-input-panel {
    @extend .panel;
}

.input-group {
    display: flex;
    gap: var(--space-4);
    align-items: flex-end;
}

.textarea-container {
    flex: 1;
    position: relative;
}

/* 消息输入面板现代化 - 增强交互体验 */
.textarea-container textarea {
    width: 100%;
    border: 2px solid var(--border-primary);
    border-radius: var(--border-radius-xl);
    padding: var(--space-5) var(--space-12) var(--space-5) var(--space-5);
    resize: vertical;
    min-height: 120px;
    max-height: 240px;
    background: linear-gradient(135deg, var(--bg-primary), rgba(255, 255, 255, 0.02));
    color: var(--text-primary);
    font-family: inherit;
    font-size: 16px;
    line-height: 1.6;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .textarea-container textarea {
    background: linear-gradient(135deg, var(--bg-primary), rgba(0, 0, 0, 0.1));
}

.textarea-container textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md), 0 0 0 4px rgba(59, 130, 246, 0.15);
    background: var(--bg-elevated);
}

.textarea-container textarea::placeholder {
    color: var(--text-muted);
    font-style: italic;
    opacity: 0.7;
}

.paste-btn {
    position: absolute;
    right: var(--space-3);
    top: var(--space-3);
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.paste-btn:hover {
    background: var(--primary-50);
    color: var(--primary-color);
}

[data-theme="dark"] .paste-btn:hover {
    background: rgba(59, 130, 246, 0.1);
}

.paste-btn .icon {
    width: 18px;
    height: 18px;
}

/* 加密状态现代化 - 简化版 */
.encryption-status {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-5);
    padding: var(--space-4) var(--space-6);
    background: linear-gradient(135deg, var(--success-50), rgba(34, 197, 94, 0.08));
    border: 1px solid var(--success-200);
    border-radius: var(--border-radius-lg);
    font-size: 15px;
    font-weight: 600;
    color: var(--success-700);
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .encryption-status {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.12), rgba(34, 197, 94, 0.05));
    border-color: rgba(34, 197, 94, 0.3);
    color: var(--success-400);
}

.encryption-status .icon {
    width: 22px;
    height: 22px;
    color: var(--success-600);
    flex-shrink: 0;
    filter: drop-shadow(0 2px 4px rgba(34, 197, 94, 0.3));
}

[data-theme="dark"] .encryption-status .icon {
    color: var(--success-400);
}

/* 上传面板现代化 */
.upload-panel {
    @extend .panel;
}

/* 上传面板现代化 - 增强交互效果 */
.upload-area {
    padding: var(--space-12);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-elastic);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    border: 3px dashed var(--border-primary);
    border-radius: var(--border-radius-2xl);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
}

.upload-area:hover::before,
.upload-area.dragover::before {
    width: 300px;
    height: 300px;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-50), rgba(59, 130, 246, 0.05));
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .upload-area:hover,
[data-theme="dark"] .upload-area.dragover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(59, 130, 246, 0.05));
}

.upload-area .upload-icon {
    width: 64px;
    height: 64px;
    color: var(--text-muted);
    margin-bottom: var(--space-6);
    transition: var(--transition-bounce);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.upload-area:hover .upload-icon,
.upload-area.dragover .upload-icon {
    color: var(--primary-color);
    filter: drop-shadow(0 8px 16px rgba(59, 130, 246, 0.3));
}

.upload-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    transition: var(--transition);
}

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

.upload-hint {
    font-size: 15px;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 500;
    opacity: 0.8;
    transition: var(--transition);
}

.upload-area:hover .upload-hint {
    opacity: 1;
    color: var(--primary-color);
}

/* 上传进度现代化 */
.upload-progress {
    margin-top: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.progress-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-600));
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: progressShine 1.5s infinite;
}

@keyframes progressShine {
    0% { left: -100%; }
    100% { left: 100%; }
}

#progressText {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 50px;
    text-align: right;
}

.btn-cancel {
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.btn-cancel:hover {
    background: var(--danger-700);
    box-shadow: var(--shadow-md);
}

.btn-cancel .icon {
    width: 18px;
    height: 18px;
}

/* 复制按钮重新设计 */
.copy-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    min-height: 32px;
}

.copy-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.copy-btn .icon {
    width: 16px;
    height: 16px;
}

/* 下载按钮优化 */
.download-btn {
    background: linear-gradient(135deg, var(--success-500), var(--success-600));
    color: white;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--border-radius);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    box-shadow: var(--shadow-xs);
}

.download-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    filter: brightness(1.05);
}

.download-btn .icon {
    width: 16px;
    height: 16px;
}

/* 在线客户端现代化 */
.clients-list {
    padding: var(--space-2) 0;
}

.client-item {
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--border-radius);
    transition: var(--transition);
    margin-bottom: var(--space-2);
    background: var(--bg-elevated);
    border: 1px solid var(--border-secondary);
}

.client-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.client-item:last-child {
    margin-bottom: 0;
}

.cid {
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
}

.tag {
    background: var(--primary-100);
    color: var(--primary-700);
    border-radius: var(--border-radius-sm);
    padding: var(--space-1) var(--space-2);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

[data-theme="dark"] .tag {
    background: rgba(59, 130, 246, 0.2);
    color: var(--primary-300);
}

.ago {
    margin-left: auto;
    color: var(--text-tertiary);
    font-size: 12px;
    font-weight: 500;
}

.u {
    color: var(--text-muted);
    font-size: 12px;
    max-width: none;
    overflow: visible;
    text-overflow: initial;
    white-space: normal;
    word-break: break-word;
    flex: 1 1 100%;
    margin-top: 2px;
}

/* 模态框现代化 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-primary);
    background: var(--bg-elevated);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-6);
    overflow-y: auto;
    max-height: calc(80vh - 120px);
}

/* 状态徽章现代化 */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--border-radius-sm);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-left: var(--space-2);
}

.encrypted-badge {
    background: var(--success-100);
    color: var(--success-700);
    border: 1px solid var(--success-200);
}

[data-theme="dark"] .encrypted-badge {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success-400);
    border-color: rgba(34, 197, 94, 0.2);
}

.plain-badge {
    background: var(--warning-100);
    color: var(--warning-700);
    border: 1px solid var(--warning-200);
}

[data-theme="dark"] .plain-badge {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-400);
    border-color: rgba(245, 158, 11, 0.2);
}

.error-badge {
    background: var(--danger-100);
    color: var(--danger-700);
    border: 1px solid var(--danger-200);
}

[data-theme="dark"] .error-badge {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-400);
    border-color: rgba(239, 68, 68, 0.2);
}

/* 加载动画现代化 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-primary);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* 工具提示现代化 */
.btn-icon[title],
.btn[title],
button[title] {
    position: relative;
}

.btn-icon[title]:hover::after,
.btn[title]:hover::after,
button[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--gray-900);
    color: white;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--border-radius);
    font-size: 12px;
    white-space: nowrap;
    z-index: 10000;
    box-shadow: var(--shadow-lg);
    pointer-events: none;
}

.btn-icon[title]:hover::before,
.btn[title]:hover::before,
button[title]:hover::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 2px);
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--gray-900);
    z-index: 10000;
    pointer-events: none;
}

[data-theme="dark"] .btn-icon[title]:hover::after,
[data-theme="dark"] .btn[title]:hover::after,
[data-theme="dark"] button[title]:hover::after {
    background: var(--gray-100);
    color: var(--gray-900);
}

[data-theme="dark"] .btn-icon[title]:hover::before,
[data-theme="dark"] .btn[title]:hover::before,
[data-theme="dark"] button[title]:hover::before {
    border-top-color: var(--gray-100);
}

/* 响应式设计优化 - 增强版 */
@media (max-width: 1024px) {
    .main {
        padding: var(--space-6) var(--space-4);
        gap: var(--space-4);
    }

    .content-wrapper {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .history-panel {
        order: 1;
    }

    .main-content {
        order: 2;
    }

    .sidebar {
        order: 3;
    }

    .panel {
        padding: var(--space-6);
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: var(--space-3);
        gap: var(--space-3);
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
        gap: var(--space-2);
    }

    .room-info {
        width: 100%;
        padding: var(--space-3);
    }

    .room-id-input {
        flex: 1;
        min-width: 120px;
        font-size: 14px;
    }

    .room-buttons {
        display: flex;
        gap: var(--space-2);
    }

    .main {
        padding: var(--space-3);
    }

    .panel {
        padding: var(--space-4);
    }

    /* 平板端保持垂直布局 */
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .history-panel {
        order: 1;
    }

    .main-content {
        order: 2;
    }

    .sidebar {
        order: 3;
    }

    .input-group {
        flex-direction: column;
        gap: var(--space-2);
    }

    .textarea-container textarea {
        min-height: 100px;
        padding: var(--space-3);
    }

    .upload-area {
        padding: var(--space-6);
    }

    .upload-area .upload-icon {
        width: 48px;
        height: 48px;
    }

    .history-header {
        flex-direction: row;
        gap: var(--space-2);
        align-items: center;
    }

    .stats-mini {
        gap: var(--space-2);
        flex-wrap: wrap;
    }

    .stat-mini {
        font-size: 12px;
        padding: var(--space-1) var(--space-2);
    }

    .modal-content {
        width: 95%;
        margin: var(--space-4);
    }

    .modal-header,
    .modal-body {
        padding: var(--space-4);
    }

    .logo {
        font-size: 22px;
    }

    .logo-badge {
        font-size: 10px;
        padding: 1px 6px;
    }
}

@media (max-width: 480px) {
    .panel-title {
        font-size: 20px;
    }

    .upload-text {
        font-size: 16px;
    }

    .upload-hint {
        font-size: 14px;
    }

    .history-item {
        padding: var(--space-4);
    }

    .item-content {
        font-size: 14px;
    }

    .btn {
        min-height: 40px;
        padding: var(--space-2) var(--space-4);
    }

    .btn-icon {
        min-height: 40px;
        min-width: 40px;
        padding: var(--space-2);
    }
}


/* ===== 481px–770px 同步移动端两列布局 ===== */
@media (min-width: 481px) and (max-width: 770px) {
    /* 两列：左65%历史，右35%输入 */
    .main {
        display: grid !important;
        grid-template-columns: 65% 35% !important;
        grid-auto-rows: auto !important;
        gap: 12px !important;
        padding: 12px !important;
    }

    /* 横幅跨两列在第一行 */
    .info-banner,
    #infoBanner {
        grid-column: 1 / 3 !important;
        grid-row: 1 !important;
    }

    /* 左列：历史记录（第2行） */
    .history-panel,
    #historyPanel {
        grid-column: 1 / 2 !important;
        grid-row: 2 !important;
        display: block !important;
        margin: 0 !important;
    }

    /* 展平包装器，允许子项作为网格项单独定位 */
    .content-wrapper {
        display: contents !important;
        grid-column: auto !important;
        grid-row: auto !important;
    }

    /* 右列：输入面板（第2行） */
    .main-content {
        grid-column: 2 / 3 !important;
        grid-row: 2 !important;
    }

    /* 第3行：文件上传跨两列 */
    .sidebar {
        grid-column: 1 / 3 !important;
        grid-row: 3 !important;
        display: block !important;
    }
}

/* ===== 771px–1025px 调整：历史记录置顶（与 >1025px 一致） ===== */
@media (min-width: 771px) and (max-width: 1025px) {
    /* 保持列向堆叠，确保顺序按列从上到下 */
    .main { 
        display: flex !important; 
        flex-direction: column !important; 
    }

    /* 覆盖 max-width: 1024 的排序，让历史记录在最上方 */
    .history-panel,
    #historyPanel {
        order: 0 !important; /* 置顶 */
    }
}

/* 主题切换动画 - 增强版 */
.theme-transition,
.theme-transition *,
.theme-transition *:before,
.theme-transition *:after {
    transition: background-color 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                color 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.5s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* 简化的动画效果 */
.float {
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

/* 删除过度复杂的动效 */

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --border-primary: #000000;
        --text-secondary: #000000;
    }

    [data-theme="dark"] {
        --border-primary: #ffffff;
        --text-secondary: #ffffff;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 焦点可见性提升 */
.btn:focus-visible,
.room-id-input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

/* 成功和错误状态 */
.success {
    color: var(--success-color) !important;
    border-color: var(--success-color) !important;
}

.error {
    color: var(--danger-color) !important;
    border-color: var(--danger-color) !important;
}

/* 隐藏类 */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
/* 语音按钮现代化设计 */
.voice-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--border-primary);
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-card));
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    min-height: 44px;
}

.voice-btn:hover {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-elevated));
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.voice-btn.recording {
    background: linear-gradient(135deg, var(--danger-500), var(--danger-600));
    color: white;
    border-color: var(--danger-600);
    animation: recordingPulse 1.5s ease-in-out infinite;
}

@keyframes recordingPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
    }
}

/* 语音指示器简化设计 */
.voice-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--border-radius);
    font-size: 14px;
    color: var(--text-secondary);
    animation: slideInUp 0.3s ease;
}

.voice-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--danger-500);
    animation: simplePulse 1s ease-in-out infinite;
}

@keyframes simplePulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.voice-indicator .btn-link {
    font-size: 13px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
}

.voice-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.voice-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.voice-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 语音播放按钮统一风格 */
.voice-play-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-card));
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    outline: none;
    min-height: 36px;
}

.voice-play-btn:hover {
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .voice-play-btn:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.05));
}

.voice-play-btn .icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.import-key-inline {
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    gap: 6px;
    align-items: center;
}

/* ===== Mobile Density Optimizations ===== */
@media (max-width: 480px) {
    body { font-size: 14px; line-height: 1.5; }

    /* 头部优化 - 紧凑布局 */
    .header { position: sticky; top: 0; z-index: 100; }
    .header .header-content {
        padding: 8px 10px;
        gap: 8px;
        flex-wrap: wrap;
    }
    .logo { font-size: 16px; gap: 6px; }
    .logo .icon { width: 18px; height: 18px; }
    .logo-text { font-size: 14px; }
    .logo-badge { display: none; }

    /* 房间信息优化 - 确保按钮可见 */
    .header-actions {
        width: 100%;
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
    }

    .room-info {
        padding: 6px 10px;
        gap: 6px;
        flex: 1 1 100%;
        min-width: 100%;
        display: flex;
        align-items: center;
        flex-wrap: nowrap;
    }
    .room-label {
        font-size: 12px;
        flex-shrink: 0;
    }
    .room-id-input {
        flex: 1;
        min-width: 100px;
        font-size: 12px;
        padding: 6px 8px;
    }
    .room-buttons {
        gap: 4px;
        display: flex;
        flex-shrink: 0;
    }

    /* 核心布局 - 强制Grid */
    .main {
        display: grid !important;
        grid-template-columns: 65% 35% !important; /* 左侧历史 65%，右侧输入 35% */
        grid-auto-rows: auto !important;
        gap: 10px !important;
        padding: 10px !important;
    }

    .info-banner,
    #infoBanner {
        grid-column: 1 / 3 !important;
        grid-row: 1 !important;
    }

    .history-panel,
    #historyPanel {
        grid-column: 1 / 2 !important;
        grid-row: 2 !important;
        display: block !important;
        margin: 0 !important;
    }

    /* 展平包装器使其子元素成为网格项，便于单独定位 */
    .content-wrapper {
        display: contents !important;
        grid-column: auto !important;
        grid-row: auto !important;
    }

    /* 右侧：消息输入面板占右列 */
    .main-content {
        grid-column: 2 / 3 !important;
        grid-row: 2 !important;
    }

    .sidebar {
        grid-column: 1 / 3 !important; /* 文件上传跨两列 */
        grid-row: 3 !important;
        display: block !important;
    }

    /* 按钮优化 - 更小更紧凑 */
    .btn {
        min-height: 38px;
        padding: 8px 14px;
        font-size: 13px;
        gap: 6px;
    }
    .btn-icon {
        min-height: 38px;
        min-width: 38px;
        padding: 8px;
    }
    .btn-icon .icon { width: 18px; height: 18px; }

    /* 主内容区优化 */
    .main {
        padding: 10px 12px;
        gap: 12px;
        min-height: auto;
    }

    /* 信息横幅优化 */
    .info-banner {
        padding: 10px 12px;
        gap: 10px;
        font-size: 13px;
        border-radius: 12px;
    }
    .info-banner .icon { width: 18px; height: 18px; }
    .info-banner span { font-size: 13px; line-height: 1.4; }

    /* 面板优化 - 减少内边距 */
    .panel {
        padding: 14px;
        border-radius: 12px;
        box-shadow: var(--shadow-sm);
    }

    /* 面板标题优化 */
    .panel-title {
        font-size: 16px;
        margin-bottom: 12px;
        gap: 8px;
    }
    .panel-title .icon { width: 20px; height: 20px; }
    .panel-title::after { display: none; }

    /* 历史记录面板优化 */
    .history-panel {
        padding: 12px;
        margin-bottom: 0;
    }
    .history-header {
        margin-bottom: 10px;
        padding-bottom: 10px;
        flex-direction: row;
        align-items: center;
    }
    .history-header .panel-title {
        margin-bottom: 0;
        font-size: 15px;
    }
    .history-actions {
        gap: 8px;
        flex-wrap: nowrap;
    }

    /* 统计信息优化 */
    .stats-mini {
        gap: 6px;
        flex-wrap: nowrap;
    }
    .stat-mini {
        font-size: 12px;
        padding: 4px 8px;
        gap: 4px;
    }
    .stat-mini .icon { width: 14px; height: 14px; }

    /* 历史记录列表优化 */
    .history-list {
        max-height: 300px;
        gap: 8px;
    }

    /* 历史记录项优化 - 紧凑卡片 */
    .history-item {
        padding: 10px;
        margin-bottom: 0;
        border-radius: 10px;
        border-left-width: 3px;
    }
    .item-header {
        margin-bottom: 8px;
        gap: 8px;
    }
    .item-type {
        font-size: 11px;
        padding: 2px 8px;
        gap: 4px;
    }
    .item-type .icon { width: 12px; height: 12px; }
    .item-content {
        font-size: 13px;
        padding: 8px;
        line-height: 1.4;
    }
    .item-time {
        font-size: 11px;
        margin-top: 6px;
    }

    /* 文件信息优化 */
    .file-info { gap: 8px; }
    .file-size {
        font-size: 11px;
        padding: 2px 6px;
    }

    /* 消息输入优化 */
    .input-group {
        gap: 8px;
        flex-direction: column;
    }
    .textarea-container textarea {
        min-height: 90px;
        max-height: 180px;
        font-size: 14px;
        padding: 10px 40px 10px 10px;
        border-radius: 12px;
    }
    .paste-btn {
        right: 8px;
        top: 8px;
        padding: 6px;
    }

    /* 语音按钮优化 */
    .voice-btn {
        width: 100%;
        justify-content: center;
        min-height: 38px;
        padding: 8px 14px;
    }
    .voice-indicator {
        padding: 8px 12px;
        gap: 8px;
        font-size: 13px;
        margin-top: 8px;
    }

    /* 加密状态优化 */
    .encryption-status {
        margin-top: 10px;
        padding: 8px 12px;
        font-size: 13px;
        gap: 8px;
        border-radius: 10px;
    }
    .encryption-status .icon { width: 18px; height: 18px; }

    /* 上传区域优化 */
    .upload-area {
        padding: 20px 16px;
        border-radius: 12px;
        border-width: 2px;
    }
    .upload-area .upload-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 12px;
    }
    .upload-text {
        font-size: 14px;
        margin-bottom: 6px;
    }
    .upload-hint {
        font-size: 12px;
        margin: 0;
    }

    /* 上传进度优化 */
    .upload-progress {
        margin-top: 10px;
        gap: 8px;
    }
    .progress-bar { height: 6px; }
    #progressText {
        font-size: 12px;
        min-width: 40px;
    }
    .btn-cancel {
        width: 32px;
        height: 32px;
    }

    /* 客户端列表优化 */
    .clients-list {
        max-height: 200px;
        overflow-y: auto;
    }
    .client-item {
        padding: 8px 10px;
        gap: 8px;
        margin-bottom: 6px;
        font-size: 13px;
    }
    .cid { font-size: 12px; }
    .tag {
        font-size: 10px;
        padding: 2px 6px;
    }
    .ago { font-size: 11px; }
    .u {
        font-size: 11px;
        max-width: none;
        white-space: normal;
        word-break: break-word;
    }

    /* 操作按钮优化 */
    .copy-btn, .download-btn {
        min-width: 32px;
        min-height: 32px;
        padding: 6px 10px;
        font-size: 12px;
    }
    .copy-btn .icon, .download-btn .icon {
        width: 14px;
        height: 14px;
    }

    /* 模态框优化 */
    .modal-content {
        width: 92%;
        margin: 12px;
        border-radius: 12px;
    }
    .modal-header, .modal-body {
        padding: 14px;
    }
    .modal-header h3 { font-size: 16px; }


    /* 历史记录紧凑显示 */
    .history-panel .panel-title {
        font-size: 13px;
    }

    .history-list {
        max-height: 280px;
    }

    .history-actions {
        flex-wrap: wrap;
    }

    .stats-mini {
        font-size: 11px;
    }

    .stat-mini {
        padding: 3px 6px;
    }
}


/* Room badge styling */
.room-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
    padding: 4px 8px;
    border-radius: 9999px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 12px;
    border: 1px solid var(--border-secondary);
}
.room-badge .icon { width: 16px; height: 16px; }
@media (max-width: 480px) {
    .room-badge { font-size: 12px; padding: 2px 6px; }
}
/* Header responsive adjustments */
.header .header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.header .header-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.room-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: nowrap;
    min-width: 0;
}

.room-id-input {
    flex: 1 1 auto;
    min-width: 160px;
}

.room-buttons {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
}

@media (max-width: 640px) {
    .room-info {
        width: 100%;
        flex-wrap: wrap;
    }
    .room-badge {
        order: 3;
        width: auto;
    }
}
/* 更多菜单样式 */
.more-menu-wrap {
    position: relative;
}

.more-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    z-index: 1000;
    min-width: 160px;
    backdrop-filter: blur(20px);
    animation: slideDown 0.2s ease;
}

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

.more-item {
    display: flex;
    align-items: center;
    width: 100%;
    text-align: left;
    padding: 10px 12px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.more-item:hover {
    background: var(--bg-tertiary);
    color: var(--primary-color);
}

.more-item:active {
    transform: scale(0.98);
}

/* 移动端优化 */
@media (max-width: 480px) {
    .more-menu {
        min-width: 150px;
        right: -8px;
    }

    .more-item {
        padding: 12px 14px;
        font-size: 15px;
    }

    /* 更多菜单按钮在移动端更突出 */
    #moreMenuBtn {
        background: var(--bg-elevated);
        border: 1px solid var(--border-primary);
    }
}

/* Ensure More button accessible on small screens (floating) */
@media (max-width: 640px) {
    .more-menu-wrap {
        position: fixed;
        right: 12px;
        top: 12px;
        z-index: 3000;
    }
    #moreMenuBtn {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        box-shadow: var(--shadow-lg);
    }
    .more-menu {
        position: fixed;
        right: 12px;
        top: 56px;
        bottom: auto;
        left: auto;
        max-height: 60vh;
        overflow-y: auto;
        z-index: 4000;
    }
}
/* New message toast */
.new-msg-toast {
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 2000;
    display: none;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--primary-600);
    color: #fff;
    border-radius: 9999px;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    user-select: none;
}
.new-msg-toast .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #fff;
}
.new-msg-toast .text { font-weight: 600; font-size: 14px; }
[data-theme="dark"] .new-msg-toast { background: var(--primary-500); }

/* Generic notification (top-right) */
.notification {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 5000;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.notification.show { opacity: 1; transform: translateY(0); }
.notification .notification-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 700;
}
.notification-info { border-color: var(--primary-200); }
.notification-success { border-color: var(--success-100); background: linear-gradient(135deg, var(--success-50), var(--bg-card)); }
.notification-warning { border-color: var(--warning-100); background: linear-gradient(135deg, var(--warning-50), var(--bg-card)); }
.notification-error { border-color: var(--danger-100); background: linear-gradient(135deg, var(--danger-50), var(--bg-card)); }
[data-theme="dark"] .notification-success { background: linear-gradient(135deg, rgba(22,163,74,0.12), var(--bg-card)); }
[data-theme="dark"] .notification-warning { background: linear-gradient(135deg, rgba(217,119,6,0.12), var(--bg-card)); }
[data-theme="dark"] .notification-error { background: linear-gradient(135deg, rgba(220,38,38,0.12), var(--bg-card)); }