/* 基本的な設定 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    margin: 0;
    background-color: #f4f7f6;
    color: #333;
}

/* ハンバーガーメニュー */
.hamburger {
    position: fixed;
    right: 20px;
    top: 20px;
    width: 44px;
    height: 44px;
    cursor: pointer;
    z-index: 300;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

.hamburger__line {
    position: absolute;
    width: 22px;
    height: 2px;
    background-color: #333;
    transition: all 0.5s;
}

.hamburger__line--1 {
    top: 14px;
}

.hamburger__line--2 {
    top: 21px;
}

.hamburger__line--3 {
    top: 28px;
}

.open .hamburger__line--1 {
    transform: rotate(-45deg);
    top: 21px;
}

.open .hamburger__line--2 {
    opacity: 0;
}

.open .hamburger__line--3 {
    transform: rotate(45deg);
    top: 21px;
}

.sp-nav {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100%;
    background-color: #fff;
    transition: right 0.5s ease;
    z-index: 200;
    padding-top: 80px;
    box-sizing: border-box;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
}

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

.sp-nav li a {
    display: block;
    padding: 18px 25px;
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s;
}

.sp-nav li a:hover {
    background-color: #f2f2f2;
}

.black-bg {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s, visibility 0.5s;
    z-index: 100;
}

.nav-wrapper.open .sp-nav {
    right: 0;
}

.nav-wrapper.open .black-bg {
    opacity: 1;
    visibility: visible;
}

/* フッター */
.site-footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 40px 20px;
    margin-top: 60px;
    text-align: center;
}

.footer-container {
    max-width: 1000px;
    margin: 0 auto;
}

.footer-nav {
    margin-bottom: 25px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px 30px;
}

.footer-nav a {
    color: #ecf0f1;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-nav a:hover {
    color: #3498db;
    text-decoration: underline;
}

.copyright {
    margin: 0;
    font-size: 0.9em;
    color: rgba(236, 240, 241, 0.7);
}


/* ここから必要なものを記述 */

/* ページ全体のコンテナ */
.page-container {
    max-width: 800px;
    margin: 80px auto 40px;
    /* 上部の余白を確保 */
    padding: 0 20px;
}

/* ページタイトル (h1) */
.page-title {
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    color: #2c3e50;
    border-bottom: 3px solid #3498db;
    padding-bottom: 10px;
}

/* 説明セクション全体 */
.explain {
    background-color: #ffffff;
    padding: 25px 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

/* 部署名 (h2) */
.explain h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-top: 0;
    margin-bottom: 30px;
    border-left: 5px solid #3498db;
    padding-left: 15px;
}

/* 質問の見出し (h3) */
.explain h3 {
    border-bottom: 2px solid #3498db;

}

/* 回答の段落 (p) 
/ .explain p {}
*/