/* ===== 全局设置 ===== */
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  font-family: 'Noto Serif SC', serif;
  background: linear-gradient(135deg, #4b92c6 0%, #294B93 100%);
  color: #FFFFFF;
  -webkit-overflow-scrolling: touch;
}



#container {
  display: flex;
  width: 100vw;
  height: 100vh;
}

/* ===== 左侧 sidebar ===== */
#sidebar {
  width: 260px;
  height: 100vh;
  overflow-y: auto;
  background: linear-gradient(135deg, #f8f4f0 0%, #f9f5f0 100%);
  padding: 20px;
  box-sizing: border-box;
  box-shadow: 2px 0 6px rgba(0,0,0,0.1);
  z-index: 1000;
  display: flex;
  flex-direction: column;
}

.app-title-floating {
  position: absolute;
  top: 12px;
  left: 16px;
  z-index: 1200;
  font-size: 20px;
  font-weight: 700;
  color: #e8ecf1;
  font-family: 'Noto Serif SC', serif;
  background: linear-gradient(135deg, #4b6cb7, #182848); /* 高级蓝灰渐变 */
  padding: 20px 20px;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  user-select: none;
}

.app-slogan {
  position: absolute;
  top: 28px; /* 距离顶部位置，跟标题保持一点距离 */
  left: 120px;
  font-size: 12px;
  color: #aec3df;
  font-family: 'Noto Serif SC', serif;
  opacity: 0.85;
  z-index: 1200;
  pointer-events: none; /* 不影响点击 */
  font-style: italic;
  letter-spacing: 0.5px;

}


.section{
  font-size: 14px;
  margin: 8px 0 4px;
  color: #555;
}

.label {
  font-size: 14px;
  margin: 20px 0 4px;
  color: #555;
}

/* ===== 主画面区 ===== */
#main {
  flex: 1;
  height: 100vh;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f2f8fd;
}

#canvas-container canvas {
  max-width: 100%;
  height: auto;
  width: auto;
  display: block;
}


/* ===== 通用按钮 ===== */
.color-group button, button {
  pointer-events: auto;
  touch-action: manipulation;
  display: inline-block;
  margin: 4px 6px 4px 0;

  border: none;
  border-radius: 8px;

  z-index: 10;

  background-color: #ffffff;
  color: #002D57;
  border: none;
  border-radius: 6px;
  padding: 10px 16px;
  font-size: 16px;
  font-family: 'Noto Serif SC', serif;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #3A5BA0;
}

button.active {
  background-color: #00529E !important;
  color: white !important;
}



/* ===== 切换摄像头按钮（悬浮） ===== */
#flipBtn {
  position: absolute;
  top: 55px;
  right: 16px;
  z-index: 1200;
  font-size: 16px;
  padding: 8px 12px;
  background: #F6DEC4;
  border-radius: 8px; /* 👈 从 100% 改为圆角矩形 */
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  z-index: 1001;
  font-family: 'Noto Serif SC', serif;
  color: #333;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease;
}
#flipBtn:hover {
  background: #ffe7ba;
}


/* ===== 切换 sidebar 按钮，仅在横屏手机上显示 ===== */
/* 默认隐藏 sidebar 的切换按钮 */
#toggleSidebar {
  display: none;
}

/* 手机模式（小屏）统一处理横竖屏 */
@media (max-width: 768px) {
  .app-title-floating {
    font-size: 16px;
    padding: 4px 10px;
  }
  
  #sidebar {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 260px;
    height: 100%;
    display: none;
    background: #f9f5f0;
    flex-direction: column;
    box-shadow: 2px 0 6px rgba(0,0,0,0.15);
    z-index: 1000;
  }

  #sidebar.show {
    display: flex !important;
  }

/* 折叠按钮浮动右上角 */
#toggleSidebar,
#closeSidebar {
  position: absolute;
  top: 30px;
  right: 16px;
  z-index: 1200;
  font-size: 16px;
  padding: 8px 12px;
  background: #00529E;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-family: 'Noto Serif SC', serif;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  cursor: pointer;
  display: none; /* 默认隐藏 */
}

#toggleSidebar.show,
#closeSidebar.show {
  display: block !important;
}

#toggleSidebar:hover,
#closeSidebar:hover {
  background: #D0E4FF;
}


  #main {
    width: 100vw;
    height: 100vh;
    justify-content: center;
    align-items: center;
  }

  #canvas-container canvas {
    width: auto !important;
    height: 70vh !important;
  }
}