/* 基础样式 */
body,
html {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    height: 100%;
}

.container {
    display: flex;
    height: 100%;
}

/* 侧边栏样式 */
.sidebar {
    width: 200px;
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    transition: all 0.3s ease;
}

.sidebar ul {
    list-style-type: none;
    padding: 0;
}

.sidebar li {
    margin-bottom: 10px;
}

.sidebar button {
    width: 100%;
    padding: 10px;
    background-color: #34495e;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.sidebar button:hover {
    background-color: #2980b9;
}

/* 主内容区样式 */
.main-content {
    flex-grow: 1;
    padding: 20px;
    background-color: #ecf0f1;
    overflow-y: auto;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        order: 2;
        padding: 10px;
    }

    .sidebar ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
    }

    .sidebar li {
        margin: 5px;
    }

    .sidebar button {
        width: auto;
        padding: 8px 15px;
    }

    .main-content {
        order: 1;
        padding: 10px;
    }
}

/* 音乐播放器样式 */
.audio-player {
    background-color: #f0f0f0;
    padding: 10px;
    border-radius: 5px;
    margin-top: 20px;
}

.audio-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.progress-container {
    flex-grow: 1;
    margin: 0 10px;
}

#progressBar {
    width: 100%;
}