/* --- 全体リセット・共通設定 --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  color: #333333;
  line-height: 1.6;
  background-color: #f9f9f9;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- ヘッダー --- */
.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e0e0e0;
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 20px;
}

.site-nav a {
  text-decoration: none;
  color: #555555;
  font-size: 0.95rem;
  transition: color 0.3s;
}

.site-nav a:hover {
  color: #000000;
}

/* --- メインビジュアル --- */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #ffffff;
  padding: 80px 0;
  text-align: center;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

/* --- セクション共通 --- */
.section {
  padding: 60px 0;
  background-color: #ffffff;
  margin-top: 20px;
}

.section-title {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 10px;
  position: relative;
}

.section-desc {
  text-align: center;
  color: #666666;
  margin-bottom: 30px;
}

/* --- Googleカレンダーのレスポンシブ表示用 --- */
.calendar-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  background: #ffffff;
}

.calendar-wrapper iframe {
  width: 100%;
  border: 0;
}

/* --- フッター --- */
.site-footer {
  text-align: center;
  padding: 30px 0;
  color: #888888;
  font-size: 0.85rem;
}

/* --- スマホ対応 (レスポンシブ) --- */
@media (max-width: 768px) {
  .hero h2 {
    font-size: 1.8rem;
  }
  
  .calendar-wrapper iframe {
    height: 450px; /* スマホでは縦幅を少しコンパクトに調整 */
  }
}