/* リセット：余白をなくす */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

/* ヘッダー全体 */
header {
    width: 100%;
    background: #ffffff;
    border-top: 2px solid #0000c8;
    border-bottom: 2px solid #0000c8;
    font-family: 'Noto Sans JP', sans-serif;
}
/* 幅1000px固定・中央寄せ */
.header-inner {
    width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
    height: 68px;
}
/* ロゴ */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}
.logo img {
    width: auto;
    height: 38px;
}
/* ナビ */
nav {
    display: flex;
    align-items: center;
    gap: 2px;
}
nav a {
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    color: #000096;
    padding: 7px 13px;
    border-radius: 20px;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}
nav a:hover {
    background: #0000c8;
    color: #fff;
}
/* お問い合わせボタン */
nav a.contact-btn {
    background: #000096;
    color: #ffffff;
    padding: 7px 18px;
    margin-left: 6px;
    border-radius: 20px;
    font-weight: 700;
}
nav a.contact-btn:hover {
    background: #0000c6;
    color: #ffffff;
}