/**
 * channel-style.css
 * 频道基础样式 + 过渡动画变量
 */

/* 引入过渡动画 */
@import url('channel-transition.css');

:root {
  --primary-color: #4a90e2;
  --secondary-color: #f5f5f5;
  --text-color: #333;
  --border-radius: 8px;
  --transition-duration: 0.3s;
  --transition-timing: ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 20px;
  background: #f0f2f5;
  color: var(--text-color);
}

/* 频道头部 */
.channel-header {
  background: white;
  padding: 15px 20px;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.channel-header h1 {
  margin: 0;
  font-size: 1.8rem;
  color: var(--primary-color);
}

/* 导航菜单 */
.channel-nav {
  background: white;
  padding: 10px 20px;
  border-radius: var(--border-radius);
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.channel-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 20px;
}

.channel-nav a {
  text-decoration: none;
  color: var(--text-color);
  padding: 8px 16px;
  border-radius: 20px;
  transition: background 0.2s;
}

.channel-nav a:hover {
  background: var(--secondary-color);
}

.channel-nav a.active {
  background: var(--primary-color);
  color: white;
}

/* 内容区域 */
.channel-content {
  background: white;
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  min-height: 300px;
}

/* 已访问模块标记 */
.module-link.visited {
  position: relative;
}

.module-link.visited::after {
  content: "✓";
  position: absolute;
  top: -5px;
  right: -5px;
  background: var(--primary-color);
  color: white;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 动画模式切换按钮 */
.animation-toggle {
  margin-left: auto;
  display: flex;
  gap: 10px;
}

.animation-toggle button {
  padding: 5px 15px;
  border: 1px solid #ddd;
  background: white;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s;
}

.animation-toggle button.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* 调试面板样式（后续使用） */
.debug-panel {
  margin-top: 30px;
  border-top: 2px dashed #ccc;
  padding-top: 20px;
}