/* ------------------------------
   全体
------------------------------ */
body {
  font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;
  margin: 0;
  background: #fafafa;
  color: #333;
  line-height: 1.9;
  padding-top: 70px; /* 固定ヘッダー分の余白 */
  font-size: 16px;
}

/* ------------------------------
   固定ヘッダー
------------------------------ */
.header {
  background: #4aa3a2;
  color: white;
  padding: 10px 20px;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-sizing: border-box;
}

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

.logo {
  margin: 0;
  font-size: 20px;
  font-weight: bold;
}

/* ------------------------------
   PCメニュー
------------------------------ */
.nav-pc ul {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
}

.nav-pc a {
  color: white;
  text-decoration: none;
  font-weight: bold;
  font-size: 15px;
}

.nav-pc a:hover {
  opacity: 0.7;
}

/* ------------------------------
   ハンバーガー（スマホ）
------------------------------ */
.hamburger {
  width: 30px;
  height: 22px;
  display: none;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
}

.hamburger span {
  display: block;
  height: 4px;
  background: white;
  border-radius: 2px;
  transition: 0.3s;
}

/* ×（閉じる）アニメーション */
.hamburger.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* ------------------------------
   スマホメニュー（見切れ防止）
------------------------------ */
.nav-sp {
  display: none;
  background: #4aa3a2;
  position: fixed;
  top: 60px;
  left: 0;
  width: 100vw;
  max-width: 100%;
  box-sizing: border-box;
  z-index: 999;
  padding: 10px 0;
}

.nav-sp ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-sp li {
  padding: 15px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.2);
}

.nav-sp a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

.nav-sp.open {
  display: block;
}

/* ------------------------------
   スマホ表示
------------------------------ */
@media (max-width: 767px) {
  .nav-pc {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}

/* ------------------------------
   コンテンツ（PCもスマホも1カラム）
------------------------------ */
.container {
  padding: 20px;
  max-width: 900px;     /* PCで読みやすい幅に制限 */
  margin: 0 auto;       /* 中央寄せ */
}

.section {
  background: white;
  padding: 28px;
  margin-bottom: 28px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.section h2 {
  margin-top: 0;
  font-size: 22px;
  color: #333;
  border-left: 6px solid #4aa3a2;
  padding-left: 10px;
}

/* ------------------------------
   ブログリンク
------------------------------ */
.blog-link {
  font-weight: bold;
  color: #4aa3a2;
  text-decoration: none;
  font-size: 16px;
}

.blog-link:hover {
  text-decoration: underline;
}

/* ------------------------------
   フッター
------------------------------ */
.footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 20px;
  margin-top: 40px;
  font-size: 14px;
}