/* 使用具有艺术风格的字体 */
body {
    background: linear-gradient(135deg, #e1f5fe, #b3e5fc);
    font-family: 'Dancing Script', cursive;
    color: #0277bd;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

footer {
    margin-top: auto; /* 推至底部 */
}

.audio-player-container {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    flex: 1; /* 占据剩余空间 */
    padding: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px;
    animation: fadeIn 0.5s ease-out;
}

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

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #0277bd;
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.file-selector {
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
}

.drag-drop-zone {
    width: 100%;
    height: 150px;
    border: 2px dashed #039be5;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
    transition: all 0.3s ease;
    cursor: pointer;
}

.drag-drop-zone.dragover {
    border-color: #0277bd;
    background-color: rgba(3, 155, 229, 0.05);
}

.drag-drop-zone .hint {
    font-size: 0.9em;
    color: #666;
}

.song-list {
    max-height: 300px;
    overflow-y: auto;
    overflow-x: hidden;
    margin-bottom: 20px;
    scrollbar-width: thin;
    scrollbar-color: #039be5 rgba(255, 255, 255, 0.1);
}

.song-list::-webkit-scrollbar {
    width: 8px;
}

.song-list::-webkit-scrollbar-thumb {
    background-color: #039be5;
    border-radius: 4px;
}

.song-list::-webkit-scrollbar-track {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.song-item {
    padding: 10px 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-item:hover {
    background-color: rgba(255, 255, 255, 0.7);
    transform: scale(1.02);
}

.song-item.active {
    background-color: rgba(3, 155, 229, 0.3);
}

.player-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.btn {
    padding: 10px 20px;
    border-radius: 50px;
    background-color: rgba(3, 155, 229, 0.3);
    color: #0277bd;
    border: none;
    transition: background-color 0.3s ease, transform 0.3s ease;
    white-space: nowrap;
}

.btn:hover {
    background-color: rgba(3, 155, 229, 0.5);
    transform: scale(1.05);
}

.btn.active {
    background-color: rgba(3, 155, 229, 0.7);
}

.pitch-shift-select {
    background-color: rgba(255, 255, 255, 0.5);
    color: #0277bd;
    border: none;
    padding: 10px 15px;
    border-radius: 10px;
    transition: background-color 0.3s ease;
}

.pitch-shift-select:hover {
    background-color: rgba(255, 255, 255, 0.7);
}

.tempo-shift-select {
    background-color: rgba(255, 255, 255, 0.5);
    color: #0277bd;
    border: none;
    padding: 10px 15px;
    border-radius: 10px;
    transition: background-color 0.3s ease;
}

.tempo-shift-select:hover {
    background-color: rgba(255, 255, 255, 0.7);
}

.row {
    display: flex; /* 启用弹性布局 */
    flex-wrap: wrap;
}
.col-md-6 {
    flex: 0 0 50%; /* 保持50%宽度 */
    max-width: 50%;
}
.d-flex {
    display: flex;
    align-items: center;
}
.justify-content-end {
    justify-content: flex-end; /* 子元素右对齐 */
}

.progress {
    background-color: rgba(3, 155, 229, 0.1);
    border-radius: 10px;
    height: 8px;
    cursor: pointer;
}

.progress-bar {
    background-color: #039be5;
    border-radius: 10px;
    height: 100%;
    transition: width 0.2s ease;
}

.btn-style {
    background-color: rgba(3, 155, 229, 0.3);
    color: #0277bd;
    border: none;
    border-radius: 50px;
    padding: 10px 20px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: inline-block;
}

.btn-style:hover {
    background-color: rgba(3, 155, 229, 0.5);
}

.hidden {
    display: none;
}

/* 自定义下拉菜单的样式 */
select {
    background-color: #e1f5fe;
    color: #0277bd;
    padding: 5px;
    border: 1px solid #b3e5fc;
    border-radius: 3px;
}

/* 下拉菜单选项的样式 */
select option {
    background-color: #e1f5fe;
    color: #0277bd;
}

#search-input {
    flex: 1;
    min-width: 200px;
    /* 新增美化样式 */
    background-color: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(3, 155, 229, 0.3);
    border-radius: 10px;
    padding: 10px 15px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

#search-input:hover {
    background-color: rgba(255, 255, 255, 0.7);
    border-color: rgba(3, 155, 229, 0.5);
}

#search-input.error {
    color: red;
}