/* =========================================================
   HEADER STYLE / rootカラー対応版（最終整形済み）
========================================================= */

/* ===============================
   ヘッダー全体
================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.site-header .container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.2rem 2rem; /* 余白をやや広げて安定感 */
  display: flex;
  align-items: center;
  justify-content: space-between;
}

body {
  padding-top: 80px;
}

/* ===============================
   ロゴ
================================= */
.site-header .logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-header .logo img {
  height: 36px; /* 視認性UP */
  width: auto;
}

/* ===============================
   CTAボタン（PCのみ表示）
================================= */
.site-header .cta-button {
  background-color: var(--color-danger);      /* 赤ベース */
  color: var(--color-white);
  padding: 0.6rem 1.8rem;
  border-radius: 9999px;
  font-size: 1rem;              /* 16pxに統一 */
  font-weight: 700;
  white-space: nowrap;
  transition: background-color 0.3s ease;
}

.site-header .cta-button:hover {
  background-color: var(--color-danger-hover); /* 濃い赤に変化 */
}

/* ===============================
   ハンバーガー（SPのみ表示）
================================= */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.menu-toggle .bar {
  height: 2px;
  width: 100%;
  background-color: var(--color-text);
  border-radius: 1px;
}

/* ===============================
   ナビゲーション共通
================================= */
.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ===============================
   PCナビゲーション（幅769px以上）
================================= */
@media (min-width: 769px) {
  .menu-toggle {
    display: none;
  }

  .main-nav {
    display: block !important;
    position: static;
    padding: 0;
  }

  .main-nav ul {
    display: flex;
    gap: 2rem;
  }

  .main-nav a {
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;            /* 明確に16px指定 */
    color: var(--color-text-light);
    transition: color 0.2s ease;
  }

  .main-nav a:hover {
    color: var(--color-primary); /* ホバー時は青に */
  }

  .site-header .cta-button {
    display: inline-block;
  }
}

/* ===============================
   SPナビゲーション（幅768px以下）
================================= */
@media (max-width: 768px) {
  .main-nav {
    display: none;
    background-color: var(--color-white);
    width: 100%;
    padding: 1rem;
    position: absolute;
    top: 60px;
    left: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 1000;
  }

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

  .main-nav ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .main-nav li a {
    display: block;
    font-size: 1.05rem; /* 少し拡大して押しやすく */
    padding: 0.6rem 0;
    color: var(--color-text);
    text-decoration: none;
  }

  .main-nav li a:hover {
    background-color: var(--color-bg-alt);
  }

  .site-header .cta-button {
    display: none !important;
  }
}

/* ===============================
   プルダウンメニュー
================================= */
.main-nav-list .submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  padding: 10px 0;
  list-style: none;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  z-index: 999;
}

.main-nav-list .has-submenu {
  position: relative;
}

.main-nav-list .has-submenu:hover .submenu {
  display: block;
}

.main-nav-list .submenu li a {
  display: block;
  padding: 8px 20px;
  color: var(--color-text);
  white-space: nowrap;
  text-decoration: none;
}

.main-nav-list .submenu li a:hover {
  background-color: var(--color-bg-alt);
}