/* 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.station {
  background-image: url("assets/station.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);
}