/* 
 * 🎨 Vibe Coding 課程網頁 - 專屬設計系統
 * 顏色偏好：#8CC7C4 (親和湖水綠)
 * 字體偏好：Zen Maru Gothic
 */

/* 1. 顏色與變數配置 (Color System & Variables) */
:root {
  /* 主色系：基於 #8CC7C4 延伸 */
  --primary: #8CC7C4;
  --primary-hover: #7ab8b5;
  --primary-light: #f1f9f8; /* 用於背景與 hover 效果 */
  --primary-dark: #5a8d8a;  /* 用於文字與 active 狀態 */
  
  /* 基礎配色 */
  --bg-color: #ffffff;
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(140, 199, 196, 0.2);
  
  /* 文字配色 */
  --text-main: #2d4241;    /* 深色調確保閱讀對比度 */
  --text-muted: #5e7d7a;
  
  /* 語意色彩 */
  --success: #67c23a;
  --error: #f56c6c;
  --warning: #e6a23c;
  --info: #909399;
  
  /* 視覺細節 */
  --border-radius: 16px;   /* 統一圓角，搭配 Zen Maru Gothic 的圓潤感 */
  --shadow-sm: 0 4px 12px rgba(140, 199, 196, 0.1);
  --shadow-lg: 0 12px 30px rgba(140, 199, 196, 0.15);
  --transition: 0.2s ease; /* 遵循微動畫規範 */
}

/* 2. 字體與基礎設定 (Typography) */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Zen Maru Gothic', sans-serif;
  color: var(--text-main);
  background-color: var(--bg-color);
  line-height: 1.7; /* 遵循 1.6~1.8 規範 */
  letter-spacing: 0.02em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 8vw, 4rem); }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

code, pre {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* 3. 背景視覺裝飾 */
.glow-blob {
  position: fixed;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  filter: blur(80px);
  opacity: 0.15;
  z-index: -1;
  border-radius: 50%;
}

.glow-1 { top: -10%; right: -10%; }
.glow-2 { bottom: -10%; left: -10%; background: radial-gradient(circle, #b8e2e0 0%, transparent 70%); }

/* 4. 排版與導覽 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 5. Hero 區塊 */
.hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 80px 0;
}

.badge {
  display: inline-block;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  padding: 8px 20px;
  border-radius: 100px;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 24px;
  border: 1px solid var(--glass-border);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 700px;
  margin-bottom: 40px;
}

/* 6. 按鈕系統 (Buttons) */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: var(--primary);
  color: white;
  padding: 16px 40px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary i {
  font-size: 1.2rem;
}

/* 7. 卡片系統 (Feature Cards) */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-bottom: 80px;
}

.feature-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  backdrop-filter: blur(8px);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.feature-card h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--primary-dark);
}

.price {
  font-size: 2.5rem;
  color: var(--primary-dark);
  font-weight: 900;
  margin: 16px 0;
}

.feature-card ul {
  list-style: none;
  margin-top: 24px;
}

.feature-card li {
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-muted);
}

.feature-card li i {
  color: var(--primary);
  margin-top: 6px;
  font-size: 0.9rem;
}

/* 8. 講師介紹 */
.lecturer-section {
  padding: 80px 0;
}

.lecturer-card {
  background: var(--primary-light);
  border-radius: var(--border-radius);
  padding: 60px;
  display: flex;
  align-items: center;
  gap: 60px;
}

.avatar {
  background-color: var(--primary);
  color: white;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 4rem;
  font-weight: 900;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.info .label {
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 0.9rem;
}

/* 9. 腳部設定 */
footer {
  text-align: center;
  padding: 80px 0;
  color: var(--info);
  font-size: 0.9rem;
  border-top: 1px solid #eee;
}

/* 10. 響應式佈局 (Responsive Design) */
/* 手機優先：Media Query 由小到大 */

/* 平板斷點 */
@media (max-width: 768px) {
  .hero { padding: 60px 0; }
  .lecturer-card {
    flex-direction: column;
    text-align: center;
    padding: 40px 24px;
  }
  .avatar { margin-bottom: 24px; }
  h1 { font-size: 2.8rem; }
}

/* 桌面斷點 */
@media (min-width: 1200px) {
  .container { padding: 0; }
  .features { gap: 40px; }
}