* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

:root {
    --bg-color: #f5f5f7;
    --container-bg: white;
    --text-color: #333;
    --piano-bg: #222;
    --keyboard-bg: linear-gradient(to bottom, #333, #222);
    --white-key-bg: linear-gradient(to bottom, #fff 0%, #f9f9f9 100%);
    --black-key-bg: linear-gradient(to bottom, #333 0%, #000 100%);
    --white-key-active: linear-gradient(to bottom, #e0e0e0 0%, #d0d0d0 100%);
    --black-key-active: linear-gradient(to bottom, #555 0%, #333 100%);
    --button-bg: #5b6af0;
    --button-hover: #4a59d4;
}

.dark-theme {
    --bg-color: #1a1a1f;
    --container-bg: #2a2a30;
    --text-color: #f0f0f0;
    --piano-bg: #111;
    --keyboard-bg: linear-gradient(to bottom, #222, #111);
    --white-key-bg: linear-gradient(to bottom, #eee 0%, #ddd 100%);
    --black-key-bg: linear-gradient(to bottom, #222 0%, #000 100%);
    --white-key-active: linear-gradient(to bottom, #ccc 0%, #bbb 100%);
    --black-key-active: linear-gradient(to bottom, #444 0%, #222 100%);
    --button-bg: #7b68ee;
    --button-hover: #6a5acd;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    color: var(--text-color);
}

.container {
    width: 100%;
    max-width: 1600px; /* 增加容器最大宽度 */
    background-color: var(--container-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    margin: 0 auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    background: linear-gradient(-45deg, #5b6af0, #8364e8, #a45deb, #cf5ce2);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    padding: 15px;
    border-radius: 10px;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

h1 {
    text-align: center;
    color: white;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    flex-grow: 1;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background-color: var(--button-bg);
    color: white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    gap: 10px;
    flex-wrap: wrap;
}

button {
    padding: 8px 15px;
    background-color: var(--button-bg);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

button:hover {
    background-color: var(--button-hover);
}

select {
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ddd;
    background-color: var(--container-bg);
    color: var(--text-color);
    font-size: 14px;
    min-width: 150px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.3s;
}

select:hover {
    border-color: var(--button-bg);
}

select option {
    background-color: var(--container-bg);
    color: var(--text-color);
    padding: 8px;
}

select optgroup {
    font-weight: bold;
    color: var(--button-bg);
}

.piano-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin: 0 auto;
    overflow: hidden;
}

#piano {
    width: 100%;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 10px 5px;
    background-color: var(--piano-bg);
    overflow: hidden; /* 修改为hidden，移除滚动条 */
    display: flex;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

#keyboard {
    height: 200px;
    position: relative;
    display: inline-flex;
    margin: 0 auto;
    width: auto; /* 修改为自动宽度，适应内容 */
    padding: 5px 0;
    background: var(--keyboard-bg);
    border-radius: 0 0 5px 5px;
}

.white-key {
    width: 38px; /* 减小白键宽度 */
    height: 180px; /* 增加白键高度 */
    background-color: white;
    border: 1px solid #ccc;
    border-radius: 0 0 5px 5px;
    position: relative;
    cursor: pointer;
    margin-right: 2px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.white-key::after {
    content: attr(data-solfeggio);
    position: absolute;
    bottom: 30px; /* 增加唱名与底部的距离 */
    left: 50%;
    transform: translateX(-50%);
    font-size: 14px;
    font-weight: bold;
    color: #333;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    text-align: center;
    width: 100%;
}

.white-key::before {
    content: attr(data-note);
    position: absolute;
    bottom: 10px; /* 音名位于底部 */
    left: 50%;
    transform: translateX(-50%);
    font-size: 14px;
    font-weight: bold;
    color: #333;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    text-align: center;
    width: 100%;
}

.black-key::after {
    content: attr(data-solfeggio);
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 14px;
    font-weight: bold;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 2px 4px;
    border-radius: 3px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    text-align: center;
    width: auto;
    z-index: 10;
}

.black-key::before {
    content: attr(data-note);
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 14px;
    font-weight: bold;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 2px 4px;
    border-radius: 3px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    text-align: center;
    width: auto;
    z-index: 10;
}

#keyboard.show-solfeggio .white-key::after,
#keyboard.show-solfeggio .black-key::after {
    opacity: 1;
}

#keyboard.show-note-names .white-key::before,
#keyboard.show-note-names .black-key::before {
    opacity: 1;
}

.black-key {
    width: 22px; /* 减小黑键宽度 */
    height: 120px;
    background: var(--black-key-bg);
    position: absolute;
    z-index: 2;
    border-radius: 0 0 3px 3px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: all 0.1s ease;
}

.white-key.active {
    background: var(--white-key-active);
    transform: translateY(2px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.black-key.active {
    background: var(--black-key-active);
    transform: translateY(2px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.current-instrument {
    text-align: center;
    margin: 15px 0;
    padding: 10px;
    background-color: var(--container-bg);
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

#currentInstrumentDisplay {
    font-weight: bold;
    color: var(--button-bg);
    margin-left: 5px;
}

.instructions {
    margin-top: 20px;
    padding: 15px;
    background-color: #f9f9f9;
    border-radius: 5px;
    border-left: 4px solid #4CAF50;
}

.instructions h2 {
    margin-bottom: 10px;
    color: #333;
}

.instructions p {
    margin-bottom: 5px;
    color: #666;
}

.keyboard-shortcuts {
    text-align: center;
    margin: 15px 0;
}

.toggle-btn {
    padding: 8px 15px;
    background-color: var(--button-bg);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}

.toggle-btn:hover {
    background-color: var(--button-hover);
}

.shortcuts-info {
    background-color: var(--container-bg);
    border-radius: 5px;
    padding: 15px;
    margin: 10px 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.shortcuts-info h3 {
    margin-top: 0;
    color: var(--text-color);
    margin-bottom: 15px;
}

.shortcuts-grid {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.shortcuts-column {
    flex: 1;
    min-width: 200px;
    margin: 0 10px;
}

.shortcuts-column p {
    margin: 5px 0;
    color: var(--text-color);
}

.shortcuts-column strong {
    color: var(--button-bg);
}

.recording-controls {
    text-align: center;
    margin: 15px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* 开关按钮样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 28px;
    margin: 0 5px;
}

/* 对话框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--container-bg);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 400px;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
}

.format-options {
    display: flex;
    justify-content: space-between;
    margin: 20px 0;
    gap: 10px;
}

.format-btn {
    flex: 1;
    padding: 10px;
    font-size: 16px;
    background-color: var(--button-bg);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.format-btn:hover {
    background-color: var(--button-hover);
    transform: translateY(-2px);
}

.format-description {
    color: var(--text-color);
    font-size: 14px;
    text-align: center;
    margin-top: 15px;
    line-height: 1.5;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--button-bg);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--button-bg);
}

input:checked + .slider:before {
    transform: translateX(32px);
}

.switch-label {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--text-color);
    margin-right: 5px;
}

.switch-container {
    display: flex;
    align-items: center;
    margin: 0 5px;
}

.record-btn {
    padding: 8px 15px;
    background-color: var(--button-bg);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}

.record-btn:hover:not(:disabled) {
    background-color: var(--button-hover);
}

.record-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
    opacity: 0.7;
}

#startRecording {
    background-color: #e74c3c;
}

#startRecording:hover {
    background-color: #c0392b;
}

#stopRecording {
    background-color: #3498db;
}

#stopRecording:hover:not(:disabled) {
    background-color: #2980b9;
}

#playRecording {
    background-color: #2ecc71;
}

#playRecording:hover:not(:disabled) {
    background-color: #27ae60;
}

.recording-status {
    font-size: 14px;
    color: var(--text-color);
    margin-left: 10px;
}

.recording {
    animation: pulse 1.5s infinite;
}

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

/* 音效分类展板样式 */
.sound-categories {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    width: 100%;
    margin: 0 auto 20px;
    flex-wrap: nowrap;
    gap: 5px;
}

/* 隐藏原来的选择器 */
.selected-instrument {
    display: none;
}

/* 隐藏原来的下拉菜单相关样式 */
.arrow-down {
    font-size: 12px;
    transition: transform 0.3s ease;
}

/* 自定义滚动条样式 - 撞色方案 */
.instrument-dropdown::-webkit-scrollbar {
    width: 10px;
}

.instrument-dropdown::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 5px;
}

.instrument-dropdown::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, #5b6af0, #cf5ce2);
    border-radius: 5px;
}

.instrument-dropdown::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, #4a59d4, #b84dca);
}

.custom-select-container.active .arrow-down {
    transform: rotate(180deg);
}

/* 控制区域样式 */
.recording-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
    gap: 10px;
    flex-wrap: wrap;
    width: 100%;
}

.recording-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.recording-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

#convertToMidi {
    padding: 8px 15px;
    background-color: var(--button-bg);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
    margin-right: 10px;
}

#convertToMidi:hover:not(:disabled) {
    background-color: var(--button-hover);
}

#convertToMidi:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
    opacity: 0.7;
}

/* 将八类音效分类排列在同一行 */
.instrument-category {
    border: 1px solid #eee;
    border-radius: 5px;
    width: calc(12.5% - 5px); /* 八类音效平均占用空间 */
    min-width: 80px;
    flex: 1;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    background-color: var(--container-bg);
    position: relative;
}

@media (max-width: 1200px) {
    .instrument-category {
        width: calc(25% - 10px); /* 每行四个 */
    }
}

@media (max-width: 900px) {
    .instrument-category {
        width: calc(33.33% - 10px); /* 每行三个 */
    }
}

@media (max-width: 600px) {
    .instrument-category {
        width: calc(50% - 10px); /* 每行两个 */
    }
}

@media (max-width: 400px) {
    .instrument-category {
        width: 100%; /* 每行一个 */
    }
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    background-color: var(--container-bg);
    cursor: pointer;
    font-weight: bold;
    color: var(--button-bg);
    transition: background-color 0.2s ease;
    border-radius: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.category-header:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

.category-header .arrow {
    font-size: 12px;
    transition: transform 0.3s ease;
}

.category-header.active .arrow {
    transform: rotate(180deg);
}

.category-options {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: var(--container-bg);
    border: 0 solid #eee;
    border-radius: 0 0 5px 5px;
    z-index: 20;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.category-options.active {
    max-height: 300px;
    overflow-y: auto;
    border-width: 1px;
}

.option {
    padding: 8px 20px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    color: var(--text-color);
}

.option:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.option.selected {
    background-color: rgba(91, 106, 240, 0.1);
    color: var(--button-bg);
    font-weight: bold;
}

@media (max-width: 768px) {
    .controls {
        flex-direction: column;
    }
}

/* 自定义滚动条样式 - 分类选项 */
.category-options::-webkit-scrollbar {
    width: 6px;
}

.category-options::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.category-options::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, #5b6af0, #8364e8);
    border-radius: 3px;
}

.category-options::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, #4a59d4, #7253d7);
}