@charset "utf-8";
/* CSS Document */

/* ヘッダー・ナビ */
header {
  position: fixed; 
  top: 0; 
  left: 0; 
  width: 100%; 
  z-index: 120; 
  background: #004DA0; 
  box-shadow: 0 2px 8px rgba(0,122,255,0.15);
  box-sizing: border-box; /* 追加 */
}

header ul li {
  list-style: none!important;
}

.nav-inner {
  max-width: 1100px; 
  margin: 0 auto; 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  padding: 12px 18px;
  box-sizing: border-box; /* 追加 */
  width: 100%; /* 追加 */
}

.logo {
  font-weight: 700; 
  color: #C7E8FA; 
  font-size: 1.05rem;
  text-decoration: none; /* 追加 */
  flex-shrink: 0; /* 追加 */
}

.menu {
  display: flex; 
  gap: 18px; 
  align-items: center;
  margin: 0; /* 追加 */
  padding: 0; /* 追加 */
  list-style: none; /* 追加 */
}

.menu li a {
  display: inline-block; 
  padding: 8px 10px; 
  color: #C7E8FA; 
  font-size: 0.95rem; 
  border-radius: 6px; 
  transition: background .18s, color .18s;
  list-style: none!important;
  text-decoration: none!important;
  white-space: nowrap; /* 追加 */
}

.menu li a:hover, 
.menu li a:focus {
  background: #C7E8FA; 
  color: #004DA0; 
  outline: none;
}

.hamburger {
  display: none; 
  background: transparent; 
  border: none; 
  font-size: 1.4rem; 
  cursor: pointer; 
  color: #C7E8FA;
  padding: 5px; /* 追加 */
  flex-shrink: 0; /* 追加 */
}

.hamburger:focus {
  outline: 2px solid #FF69B4; 
  border-radius: 6px;
}

/* モバイルメニュー調整 */
@media (max-width: 900px) {
  .nav-inner {
    padding: 12px 15px; /* パディング調整 */
  }
  
  .menu {
    position: absolute;
    top: 100%; /* ヘッダーの高さに合わせて調整 */
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    margin: 0;
    list-style: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease-in-out;
    box-shadow: 0 6px 18px rgba(0,122,255,0.2);
    z-index: 999;
    border: 1px solid #C7E8FA;
    box-sizing: border-box; /* 追加 */
  }

  .menu li {
    width: 100%;
    box-sizing: border-box; /* 追加 */
  }

  .menu li a {
    display: block;
    width: 100%;
    padding: 14px 20px;
    font-size: 1.1rem;
    color: #004DA0;
    text-align: left;
    transition: background .2s, color .2s;
    box-sizing: border-box; /* 追加 */
  }

  .menu li a:hover {
    background: #C7E8FA;
    color: #004DA0;
  }

  /* 展開時 */
  .menu.active {
    max-height: 400px; /* 項目数に応じて十分な高さ */
  }

  .hamburger {
    display: block;
    position: relative;
    z-index: 1001;
  }
}

/* 小型モバイル対応 */
@media (max-width: 600px) {
  .nav-inner {
    padding: 10px 12px;
  }
  
  .logo {
    font-size: 1rem;
  }
  
  .hamburger {
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .nav-inner {
    padding: 8px 10px;
  }
  
  .logo {
    font-size: 0.9rem;
  }
}