/* music/piano.css */

/* 颜色变量定义 */
:root {
    /* 浅色模式变量 */
    --bg-gradient-start: #667eea;
    --bg-gradient-end: #764ba2;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.9);
    --text-tertiary: rgba(255, 255, 255, 0.8);
    --key-bg-start: #ffffff;
    --key-bg-end: #f0f0f0;
    --key-border: #d4a574; /* 金色边框 */
    --key-text: #333333;
    --key-pressed-start: #e0e0e0;
    --key-pressed-end: #d0d0d0;
    --control-bg: rgba(255, 255, 255, 0.15);
    --control-border: rgba(255, 255, 255, 0.3);
    --control-hover-bg: rgba(255, 255, 255, 0.25);
    --control-hover-border: rgba(255, 255, 255, 0.4);
    --select-bg: rgba(255, 255, 255, 0.2);
    --select-option-bg: #2c3e50;
}

/* 深色模式变量 - 黑色底，白色按键 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-gradient-start: #000000;
        --bg-gradient-end: #1a1a1a;
        --glass-bg: rgba(255, 255, 255, 0.03);
        --glass-border: rgba(255, 255, 255, 0.08);
        --text-primary: #ffffff;
        --text-secondary: rgba(255, 255, 255, 0.9);
        --text-tertiary: rgba(255, 255, 255, 0.7);
        --key-bg-start: #ffffff;
        --key-bg-end: #f5f5f5;
        --key-border: #d4a574; /* 金色边框 */
        --key-text: #1a1a1a;
        --key-pressed-start: #e8e8e8;
        --key-pressed-end: #d8d8d8;
        --control-bg: rgba(255, 255, 255, 0.05);
        --control-border: rgba(255, 255, 255, 0.12);
        --control-hover-bg: rgba(255, 255, 255, 0.08);
        --control-hover-border: rgba(255, 255, 255, 0.2);
        --select-bg: rgba(255, 255, 255, 0.08);
        --select-option-bg: #2a2a2a;
    }
}

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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 5px;
    /* 移动端优化 */
    touch-action: manipulation;
    user-select: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: background 0.3s ease;
}

.back-button {
    position: fixed;
    top: 20px;
    left: 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--control-border);
    border-radius: 20px;
    padding: 12px 20px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: bold;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 100;
}

.back-button:hover {
    background: var(--control-hover-bg);
    border-color: var(--control-hover-border);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    text-decoration: none;
    color: var(--text-primary);
}

.back-button:active {
    transform: translateY(0);
}

.piano-container {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    width: 100%;
    max-width: 100vw;
    height: 100%;
    max-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.title {
    text-align: center;
    color: var(--text-primary);
    font-size: 2.2em;
    margin-bottom: 15px;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    flex-shrink: 0;
    transition: color 0.3s ease;
}

.keyboard {
    display: grid;
    gap: 8px;
    margin: 0 auto;
    transition: all 0.3s ease;
    width: 100%;
    height: 100%;
    max-width: 100vw;
    max-height: 85vh;
    flex: 1;
}

.keyboard.portrait {
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(3, 1fr);
    aspect-ratio: 5/3;
}

.keyboard.landscape {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(5, 1fr);
    aspect-ratio: 3/5;
    max-width: 70vw;
}

.key {
    width: 100%;
    height: 100%;
    aspect-ratio: 1/1; /* 确保正方形 */
    background: linear-gradient(180deg, var(--key-bg-start) 0%, var(--key-bg-end) 100%);
    color: var(--key-text);
    border: 3px solid var(--key-border); /* 增加边框宽度并使用金色 */
    border-radius: 24px; /* 进一步增大圆角 */
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: clamp(12px, 2.5vw, 18px);
    transition: all 0.1s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    /* 移动端触摸优化 */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    /* 确保最小触摸区域 */
    min-width: 60px;
    min-height: 60px;
}

.key::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.4) 0%, rgba(255,255,255,0.1) 50%, rgba(0,0,0,0.05) 100%);
    opacity: 0;
    transition: opacity 0.1s ease;
    border-radius: 21px; /* 与按键圆角匹配 */
}

.key:hover::before {
    opacity: 1;
}

.key:active,
.key.pressed {
    transform: translateY(3px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    background: linear-gradient(180deg, var(--key-pressed-start) 0%, var(--key-pressed-end) 100%);
    border-color: #c69c6d; /* 按下时稍微深一点的金色 */
}

.instructions {
    text-align: center;
    color: var(--text-tertiary);
    margin-top: 30px;
    font-size: 16px;
    transition: color 0.3s ease;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 8px;
    flex-wrap: wrap;
    flex-shrink: 0;
}

/* 现代化布局切换按钮 */
.layout-toggle {
    background: linear-gradient(135deg, var(--control-bg) 0%, var(--glass-bg) 100%);
    border: 2px solid var(--control-border);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.layout-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--control-hover-bg), transparent);
    transition: left 0.6s ease;
}

.layout-toggle:hover {
    background: linear-gradient(135deg, var(--control-hover-bg) 0%, var(--control-bg) 100%);
    border-color: var(--control-hover-border);
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.25);
}

.layout-toggle:hover::before {
    left: 100%;
}

.layout-toggle:active {
    transform: translateY(-1px);
    transition: transform 0.1s ease;
}

#layoutIcon {
    font-size: 18px;
    transition: transform 0.4s ease;
}

.layout-toggle:hover #layoutIcon {
    transform: scale(1.1) rotate(5deg);
}

/* 现代化音色控制 */
.timbre-control {
    display: flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--control-bg) 0%, var(--glass-bg) 100%);
    padding: 8px 16px;
    border-radius: 25px;
    backdrop-filter: blur(15px);
    border: 1px solid var(--control-border);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.timbre-control label {
    color: var(--text-primary);
    font-size: 18px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    transition: color 0.3s ease;
}

.timbre-control select {
    background: linear-gradient(135deg, var(--select-bg) 0%, var(--glass-bg) 100%);
    border: 1px solid var(--control-border);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    backdrop-filter: blur(10px);
    outline: none;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

@media (prefers-color-scheme: dark) {
    .timbre-control select {
        background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    }
}

.timbre-control select:hover {
    background: linear-gradient(135deg, var(--control-hover-bg) 0%, var(--select-bg) 100%);
    border-color: var(--control-hover-border);
    transform: translateY(-1px);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05), 0 4px 12px rgba(0, 0, 0, 0.15);
}

.timbre-control select:focus {
    border-color: var(--control-hover-border);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05), 0 0 0 3px var(--control-bg);
}

.timbre-control select option {
    background: linear-gradient(135deg, var(--select-option-bg) 0%, var(--bg-gradient-end) 100%);
    color: var(--text-primary);
    padding: 10px 15px;
    border: none;
    font-weight: 500;
}

.timbre-control select option:hover {
    background: linear-gradient(135deg, var(--bg-gradient-end) 0%, var(--select-option-bg) 100%);
}

@media (max-width: 768px) {
    .back-button {
        top: 10px;
        left: 10px;
        padding: 8px 12px;
        font-size: 12px;
        border-radius: 15px;
    }

    .piano-container {
        padding: 8px;
        margin: 2px;
    }
    
    .title {
        font-size: 1.5em;
        margin-bottom: 10px;
    }
    
    .keyboard {
        gap: 6px;
        max-width: 100vw;
        max-height: 88vh;
    }
    
    .keyboard.portrait {
        aspect-ratio: 5/3;
    }
    
    .keyboard.landscape {
        aspect-ratio: 3/5;
        max-width: 85vw;
    }
    
    .key {
        font-size: clamp(12px, 2.2vw, 18px);
        border-radius: 20px; /* 平板端稍小的圆角 */
        min-width: 60px;
        min-height: 60px;
    }

    .key::before {
        border-radius: 17px;
    }
    
    .instructions {
        font-size: 12px;
    }
    
    .controls {
        flex-direction: column;
        gap: 12px;
        margin-top: 5px;
    }
    
    .layout-toggle {
        padding: 10px 18px;
        font-size: 13px;
        gap: 8px;
    }
    
    .timbre-control {
        padding: 6px 12px;
        gap: 10px;
    }
    
    .timbre-control select {
        padding: 8px 12px;
        font-size: 12px;
        width: 140px;
        padding-right: 35px;
        background-size: 14px;
        background-position: right 10px center;
    }
}

@media (max-width: 480px) {
    .back-button {
        top: 5px;
        left: 5px;
        padding: 6px 10px;
        font-size: 11px;
        border-radius: 12px;
    }

    .piano-container {
        padding: 5px;
        margin: 1px;
    }
    
    .title {
        font-size: 1.3em;
        margin-bottom: 8px;
    }
    
    .keyboard {
        gap: 4px;
        max-height: 90vh;
    }
    
    .key {
        font-size: clamp(10px, 2vw, 16px);
        border-radius: 16px; /* 小屏幕的圆角 */
        min-width: 55px;
        min-height: 55px;
    }

    .key::before {
        border-radius: 13px;
    }
    
    .instructions p {
        margin-bottom: 3px;
        font-size: 11px;
    }
    
    .layout-toggle {
        padding: 8px 14px;
        font-size: 11px;
        gap: 6px;
    }
    
    #layoutIcon {
        font-size: 16px;
    }
    
    .timbre-control {
        padding: 5px 10px;
        gap: 8px;
    }
    
    .timbre-control select {
        padding: 6px 10px;
        font-size: 11px;
        width: 120px;
        padding-right: 30px;
        background-size: 12px;
        background-position: right 8px center;
    }
    
    .controls {
        margin-top: 3px;
        gap: 8px;
    }
}

@media (orientation: landscape) and (max-height: 600px) {
    .back-button {
        top: 3px;
        left: 3px;
        padding: 4px 6px;
        font-size: 9px;
    }

    .piano-container {
        padding: 3px;
    }
    
    .title {
        font-size: 1.1em;
        margin-bottom: 5px;
    }
    
    .keyboard {
        max-height: 85vh;
        gap: 3px;
    }
    
    .instructions {
        font-size: 10px;
    }
    
    .controls {
        margin-top: 2px;
        gap: 8px;
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .layout-toggle {
        padding: 4px 8px;
        font-size: 9px;
        gap: 4px;
    }
    
    .timbre-control {
        padding: 3px 6px;
        gap: 6px;
    }
    
    .timbre-control select {
        padding: 3px 6px;
        font-size: 9px;
        width: 100px;
        padding-right: 25px;
        background-size: 10px;
        background-position: right 6px center;
    }
}