/* 1. Google Fonts 読み込み */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@500;700&display=swap');

:root {
  --primary-color-light: #a0e9fd;
  --primary-color-dark:  #57c7f4;
  --button-bg: #ffffff;
  --button-color: #2f4f4f;
  --transition-speed: 0.3s;
}

header {
  display: flex;
  justify-content: left;
  align-items: center;
  padding: 0 2rem;
  height: 80px;
  background: linear-gradient(135deg,var(--primary-color-dark),var(--primary-color-light));
  font-family: 'Montserrat', sans-serif;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-radius: 2rem;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
}

nav ul {
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.menu-item a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--button-bg);
  color: var(--button-color);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0.5rem;
  box-shadow: 0 5px 15px -8px rgba(0, 0, 0, 0.2);
  transition: 
    background-color var(--transition-speed),
    transform var(--transition-speed),
    box-shadow var(--transition-speed);
}

.menu-item a:hover {
  background-color: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -10px rgba(0, 0, 0, 0.25);
}


.logo img {
  display: block;
  height: 60px;     /* ヘッダー高に合わせて調整 */
  width: auto;
}



/* ────────────────────────────────────── */
/* 既存の header は左寄せ（flex-start）のままキープ 
    theme.cssにも同じ内容を記載している
*/
header.site-header {
  display: flex;
  align-items: center;
  justify-content: flex-start;  /* ← 変更なし */
  padding: 0 2rem;
  height: 80px;
  background: linear-gradient(135deg,var(--primary-color-dark),var(--primary-color-light));
  font-family: 'Montserrat', sans-serif;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-radius: 2rem;
}

/* ────────────────────────────────────── */
/* ハンバーガーを右端に追いやる */
.hamburger {
  display: none;       /* 通常は非表示 */
  /* ↓ ここがポイント ↓ */
  margin-left: auto;   /* これで残りの余白を埋め、右端に飛ばす */
  flex-direction: column;
  justify-content: space-around;
  width: 2rem;
  height: 2rem;
  background: transparent;
  border: none;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 0.2rem;
  background-color: #fff;
  border-radius: 2px;
  transition: transform var(--transition-speed) ease,
              opacity  var(--transition-speed) ease;
}

/* ────────────────────────────────────── */
/* モバイル時だけ表示＆メニュー開閉 */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    background: linear-gradient(135deg,var(--primary-color-dark),var(--primary-color-light));
    transition: max-height var(--transition-speed) ease;
    z-index: 10;
  }

  .main-nav.open {
    max-height: 300px;
  }

  .main-nav ul {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  .main-nav li {
    margin: 0;
  }
  .main-nav a {
    padding: 1rem;
  }
}

/* ────────────────────────────────────── */
/* デスクトップ時は横並びナビを常に表示 */
@media (min-width: 769px) {
  .main-nav {
    position: static;
  }
  .main-nav ul {
    display: flex;
    gap: 1rem;
  }
}