/* 按鈕絕對定位在 canvas 底部中央 */

.show-list-btn {
    display: none;
    position: absolute;
    bottom: 2%;          /* 距底部百分比，會跟 canvas 高度縮放 */
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    background: #1e88e5;
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 1.2% 2.4%;  /* 百分比 padding，跟 canvas 縮放 */
    font-size: 1.2vw;    /* 跟 canvas 寬度縮放字型 */
    cursor: pointer;
    box-shadow: 0 0.4vw 1.2vw rgba(0, 0, 0, 0.4);
    transition: all 0.3s ease;
}

.show-list-btn:hover {
    background: #42a5f5;
    transform: translateX(-50%) scale(1.05);
}

.show-list-btn.show {
    display: block;
    /* 顯示按鈕 */
    opacity: 1;
}

.midi-list-container {
    display: none;
    position: fixed;
    /* 固定在視窗，不跟隨畫布滾動 */
    top: 80px;
    /* 距離頂部 80px，可依需要調整 */
    left: 50%;
    /* 水平置中 */
    transform: translateX(-50%);
    width: 80%;
    max-width: 700px;
    height: 60vh;
    /* 高度 60% 視窗高度 */
    background: #1a1a1a;
    border: 2px solid #333;
    border-radius: 12px;
    overflow-y: auto;
    /* 可滾動 */
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.7);
    padding: 16px;
    z-index: 100;
    /* 保證在畫布上層 */
}

/* 清單標題 */
.midi-list-title {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 12px;
    color: #66ccff;
    text-align: left;
}

/* MIDI 個別項目 */
.midi-item {
    padding: 10px 8px;
    border-bottom: 1px solid #333;
    color: #eee;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s;
}

.midi-item:hover {
    background: #222;
}

/* 清單關閉按鈕 */
.close-btn {
    position: absolute;
    top: 10px;
    right: 14px;
    color: #ccc;
    font-size: 20px;
    cursor: pointer;
    transition: color 0.3s;
}

.close-btn:hover {
    color: #fff;
}

/* MIDI 搜尋框 */
.midi-search {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 12px;
    margin-bottom: 12px;

    border-radius: 8px;
    border: 1px solid #333;
    background: #111;

    color: #eee;
    font-size: 14px;

    outline: none;
    transition: border 0.25s, box-shadow 0.25s;
}

.midi-search::placeholder {
    color: #777;
}

/* focus 狀態 */
.midi-search:focus {
    border-color: #66ccff;
    box-shadow: 0 0 0 1px rgba(102, 204, 255, 0.4);
}

/* 搜尋結果為空 */
.empty {
    padding: 12px;
    text-align: center;
    color: #777;
    font-style: italic;
}