/* 定義木質調變數 */
:root {
    --wood-dark: #2c1e14;      /* 深胡桃木 */
    --wood-medium: #5d3a1a;    /* 溫暖柚木 */
    --wood-light: #8b5a2b;     /* 亮橡木 */
    --paper-white: #f5f2e8;    /* 羊皮紙色文字 */
    --accent-gold: #d4af37;    /* 金色重點色 (取代藍色) */
}
/*Glass*/
.glass-panel{
  /* 0.1 代表只有 10% 的顏色，幾乎是透明的 */
    background: rgba(255, 255, 255, 0.1) !important; 
    backdrop-filter: blur(5px); /* 輕微模糊增加質感 */
    -webkit-backdrop-filter: blur(5px);
}
.text-info {
  color:#f5f2e8 !important;
}
/*scean*/
body.lake {background-image: url('assets/lake.webp');}
body.night {background-image: url('assets/night.webp');}
body.ocean {background-image: url('assets/ocean.webp');}
body.pub {background-image: url('assets/pub.webp');}
body.flower {background-image: url('assets/flower.webp');}
body.happy {background-image: url('assets/happy.webp');}

body {
  background-image: url('assets/night.webp');
  
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-blend-mode: normal;
  background-color: transparent;
  /*換背景*/
  transition: background-image 1.5s ease-in-out;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/*navbar*/
.navbar {
  flex:0 0 5vh;
  background: rgba(0,0,0,0.1) !important;
  backdrop-filter: blur(8px);
}

/* Main */
.main-container {
  display: flex;
  flex: 0 0 65vh;
  padding-top: 10px;
  padding-bottom: 10px;
}

/*SONG LIST */
.side-panel {
    background: rgba(44, 30, 20, 0.7) !important; /* 深木色透明 */
    backdrop-filter: blur(10px);
    border: 1px solid rgba(139, 90, 43, 0.3);
    border-radius: 15px;
    height: 100%;
    min-width: 0;
    overflow: hidden;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.5);
}
#songList {
  flex-grow:1;
  overflow-y: auto;
}
/*美化 */
.playlist-item {
    padding: 12px 15px;
    color: #b5a48b;
    border-bottom: 1px solid rgba(139, 90, 43, 0.2);
}

.playlist-item:hover {
    background: rgba(139, 90, 43, 0.2);
    color: var(--paper-white);
}

.playlist-item.active {
    background: var(--wood-medium);
    color: var(--accent-gold);
    border-left: 4px solid var(--accent-gold);
}
/* CANVAS */
.canvas-wrapper {
    background: rgba(0, 0, 0, 0.2) !important;
    border-radius: 12px;
    border: 3px solid var(--wood-medium); /* 像畫框一樣 */
    box-shadow: 0 0 20px rgba(0,0,0,0.8);
    overflow: hidden;
    position: relative;
}

.output_canvas {
    max-width: 100%;
    max-height: 100%;
    aspect-ratio: 1280 / 640; 
    object-fit: contain;
    transform: scaleX(-1);
    border: 2px dashed rgb(96, 96, 96);
}
#composer-slot {
    /* 強制預留高度，避免組件跳出來時推擠排版 */
    min-height: 350px; 
    width: 100%;
    margin-top: 15px;
    /* 讓它有一點深色底色，即使沒東西時也不會看起來空空的 */
    background: rgba(0, 0, 0, 0.2); 
    border-radius: 12px;
    transition: all 0.3s ease; /* 增加平滑感 */
}
/*Synth and effect*/
/* 針對按鈕邊框與文字 */
.btn-outline-info {
    color: var(--paper-white) !important;        /* 木質棕 */
    border-color: var(--paper-white) !important;
}

/* 6. 下方資訊區：古籍感 */
.song-info {
    background: rgba(44, 30, 20, 0.6);
    border: 2px solid var(--wood-medium);
    border-radius: 12px;
}

/* 7. 滾動條：木質調配色 */
.custom-scrollbar::-webkit-scrollbar-thumb {
    background: var(--wood-light);
}