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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    overflow: hidden;
}

.container {
    display: flex;
    height: 100vh;
    position: relative;
}

/* 控制面板样式 */
        .control-panel {
            width: 320px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-right: 1px solid rgba(255, 255, 255, 0.2);
            padding: 20px;
            overflow-y: auto;
            transition: transform 0.3s ease;
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
            position: relative;
            z-index: 1000;
        }
        
        .control-panel.hidden {
            transform: translateX(-100%);
        }
        
        .control-panel.hidden + .teleprompter-container {
            margin-left: 0;
        }
        
        .teleprompter-container {
            transition: margin-left 0.3s ease;
        }

.panel-section {
    margin-bottom: 25px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 版权信息样式 */
.copyright-section {
    margin-top: 20px;
    padding: 15px 0 5px 0;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 8px;
    border-top: 2px solid rgba(102, 126, 234, 0.3);
}

.copyright-section p {
    margin: 0;
    text-align: center;
    font-size: 12px;
    color: #666;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.panel-section h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 16px;
    font-weight: 600;
    border-bottom: 2px solid #667eea;
    padding-bottom: 5px;
}

/* 文本输入区域 */
#textInput {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 14px;
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

#textInput:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 控制组 */
.control-group {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap; /* 防止换行 */
}

.control-group label {
    font-weight: 500;
    color: #555;
    min-width: 60px;
    font-size: 13px;
    flex-shrink: 0; /* 防止标签收缩 */
}

.control-group input[type="range"] {
    flex: 1;
    min-width: 0; /* 允许滑块收缩 */
    height: 6px;
    border-radius: 3px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    transition: background 0.3s ease;
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
    background: #5a6fd8;
}

.control-group input[type="color"] {
    width: 50px;
    height: 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.control-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #667eea;
}

.control-group span {
    font-weight: 600;
    color: #667eea;
    min-width: 35px;
    max-width: 40px; /* 限制最大宽度 */
    text-align: center;
    font-size: 12px;
    flex-shrink: 0; /* 防止数字显示收缩 */
}

/* 按钮样式 */
button {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
}

#formatText {
    background: #28a745;
    color: white;
    width: 100%;
    margin-top: 10px;
}

#formatText:hover {
    background: #218838;
    transform: translateY(-1px);
}

.control-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

#startScroll {
    background: #007bff;
    color: white;
}

#startScroll:hover {
    background: #0056b3;
}

#pauseScroll {
    background: #ffc107;
    color: #212529;
}

#pauseScroll:hover {
    background: #e0a800;
}

#resetScroll {
    background: #dc3545;
    color: white;
}

#resetScroll:hover {
    background: #c82333;
}

#prevLineBtn, #nextLineBtn {
    background: #6c757d;
    color: white;
    flex: 1;
}

#prevLineBtn:hover, #nextLineBtn:hover {
    background: #5a6268;
}

#createRoomBtn {
    background: #28a745;
    color: white;
}
#createRoomBtn:hover {
    background: #218838;
}

#joinRoomBtn {
    background: #007bff;
    color: white;
}
#joinRoomBtn:hover {
    background: #0056b3;
}

#copyRoomIdBtn {
    background: #e9ecef;
    color: #333;
    border: 1px solid #ced4da;
    padding: 2px 8px;
    margin: 0;
}
#copyRoomIdBtn:hover {
    background: #dae0e5;
}

#toggleFullscreen {
    background: #6f42c1;
    color: white;
    width: 100%;
    margin-bottom: 10px;
}

#toggleFullscreen:hover {
    background: #5a32a3;
}

#togglePanel {
    background: #17a2b8;
    color: white;
    width: 100%;
}

#togglePanel:hover {
    background: #138496;
}

/* 进度条 */
.progress-bar {
    width: 100%;
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    font-weight: 600;
    color: #667eea;
    font-size: 14px;
}

/* 提词器显示区域 */
.teleprompter-container {
    flex: 1;
    background: #000;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: margin-left 0.3s ease;
    min-height: 0; /* 修复flex项目的高度问题 */
}

/* 悬浮恢复按钮 */
.show-panel-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(23, 162, 184, 0.9);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    z-index: 1001;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.show-panel-btn:hover {
    background: rgba(23, 162, 184, 1);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.teleprompter-content {
    width: 98%;
    max-width: 1400px;
    height: 85vh;
    position: relative;
    overflow: hidden;
    transition: width 0.3s ease, max-width 0.3s ease; /* 添加过渡效果 */
}

/* 控制面板隐藏时扩展文本内容区域 */
.container.panel-hidden .teleprompter-content {
    width: 100%; /* 占满整个可用宽度 */
    max-width: none; /* 移除最大宽度限制 */
    height: 100vh; /* 占满整个视口高度 */
    margin: 0; /* 移除边距 */
    padding: 0 40px; /* 添加一些内边距，让文本不会太靠边 */
}

.text-display {
    padding: 50px 20px;
    transition: transform 0.1s linear;
    will-change: transform;
    color: #ffffff; /* 确保文本颜色为白色 */
    font-size: 32px; /* 默认字体大小 */
    line-height: 1.8; /* 默认行高 */
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* 控制面板隐藏时调整文本显示的内边距 */
.container.panel-hidden .text-display {
    padding: 50px 60px; /* 增加左右内边距，充分利用屏幕宽度 */
}

/* 全屏模式下的文本显示内边距 */
.container.fullscreen .text-display {
    padding: 50px 60px; /* 增加左右内边距，充分利用屏幕宽度 */
}

.text-display p {
    margin-bottom: 0.5em; /* 减少段间距 */
    line-height: 1.8; /* 应用到每一行 */
    text-align: center;
    font-weight: 400;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

/* 阅读指导线 */
        .reading-guide {
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 3px;
            background: rgba(255, 255, 255, 0.8);
            transform: translateY(-50%);
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.3s ease;
            display: none; /* 隐藏阅读指导线 */
        }

.reading-guide::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 20px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.3) 20%,
        rgba(255, 255, 255, 0.8) 50%,
        rgba(255, 255, 255, 0.3) 80%,
        transparent 100%
    );
}

.reading-guide.visible {
    opacity: 1;
}

/* 全屏模式 */
.container.fullscreen .control-panel {
    display: none;
}

.container.fullscreen .teleprompter-container {
    width: 100vw;
    height: 100vh;
}

.container.fullscreen .teleprompter-content {
    width: 100%;
    max-width: none;
    height: 100vh;
    padding: 0 40px; /* 添加一些内边距，让文本不会太靠边 */
}

/* 控制面板隐藏时的全屏扩展 */
.container.panel-hidden .teleprompter-container {
    margin-left: 0;
    width: 100vw; /* 使用视口宽度，占满整个屏幕 */
    border-radius: 0;
    position: absolute; /* 使用绝对定位占满空间 */
    left: 0;
    top: 0;
    height: 100vh; /* 占满整个视口高度 */
}

.container.panel-hidden {
    padding: 0;
    border-radius: 0;
    overflow: hidden; /* 防止出现滚动条 */
}

/* 当控制面板隐藏时，移除body的渐变背景 */
body.panel-hidden-bg {
    background: #000000; /* 纯黑色背景 */
}

/* 响应式设计 */
@media (max-width: 768px) {
    .control-panel {
        width: 280px;
        padding: 15px;
    }
    
    .teleprompter-content {
        width: 98%;
        max-width: none;
    }
    
    .text-display {
        padding: 30px 15px;
    }
}

@media (min-width: 1200px) {
    .teleprompter-content {
        width: 95%;
        max-width: 1600px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.panel-section {
    animation: fadeIn 0.5s ease forwards;
}

.panel-section:nth-child(1) { animation-delay: 0.1s; }
.panel-section:nth-child(2) { animation-delay: 0.2s; }
.panel-section:nth-child(3) { animation-delay: 0.3s; }
.panel-section:nth-child(4) { animation-delay: 0.4s; }
.panel-section:nth-child(5) { animation-delay: 0.5s; }

/* 模态框样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    padding: 25px;
    border-radius: 12px;
    width: 85%;
    max-width: 320px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    transform: translateY(0);
    animation: slideUp 0.3s ease;
}

.modal-content h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 18px;
}

.modal-content p {
    color: #555;
    margin-bottom: 10px;
    line-height: 1.5;
}

.modal-content button {
    margin-top: 15px;
    width: 100%;
    background: #667eea;
    color: white;
    padding: 12px;
    font-size: 15px;
}

.modal-content button:hover {
    background: #5a6fd8;
}

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