/* ===== カラートークン ===== */
:root{
  /* 背景・ベース */
  --page-bg: #FFFFFF;
  --ink: #2F2F2F;
  --muted: #667085;
  --page-width: 940px;

  /* 外枠ボックス */
  --outer-border: #8CB0D6;

  /* Q行の帯 */
  --qband: #DFECF7;

  /* Qバッジ */
  --qbadge: #5B8CEB;
  --qbadge-text: #FFFFFF;

  /* Aバッジ */
  --abadge: #F4B83A;
  --abadge-text: #FFFFFF;

  /* A回答ボックス */
  --card: #FFFFFF;

  /* カテゴリチップ */
  --chip-bg: #FFFFFF;
  --chip-border: #87A9D1;
  --chip-text: #3A4B5C;
  --chip-active: #6D94D9;
  --chip-active-text: #FFFFFF;

  /* 最下部ボタン */
  --accent: #F4A100;
  --accent-text: #FFFFFF;

  /* リンク */
  --link: #3A6FD9;
  --link-hover: #2F60C1;

  /* ヘッダー */
  --header-bg: #FFFFFF;
  --line-sep: #E5EDF6;
  --nav-text: #3A4B5C;

  /* フッター */
  --footer-overlay: rgba(15, 41, 76, .72);
  --footer-ink: #DCE7F5;
  --footer-link: #F1F5FF;

  /* 共通値 */
  --radius: 12px;
  --radius-chip: 10px;
  --radius-btn: 8px;
}

*{box-sizing:border-box; margin:0; padding:0}

body{
  margin:0;
  font-family: "Noto Sans JP", system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Hiragino Kaku Gothic ProN","Meiryo",sans-serif;
  color:var(--ink);
  background:var(--page-bg);
  line-height:1.8;
  font-size:16px;
}

/* ===== レイアウト ===== */
.container{
  max-width:var(--page-width);
  margin:0 auto;
  padding:0 20px;
}

/* ===== サイトヘッダー（ロゴ＋ナビ） ===== */
.site-header{
  background:transparent;
  border-bottom:none;
  height:72px;
  position:sticky;
  top:0;
  left:0;
  right:0;
  z-index:1000;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled{
  background:#FFFFFF;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .06);
}

.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:100%;
}

.site-logo{
  display:flex;
  align-items:center;
  padding:16px 12px;
}

.site-logo a{
  display:flex;
  align-items:center;
  transition: opacity 0.2s;
}

.site-logo a:hover{
  opacity:0.8;
}

.site-logo img{
  height:40px;
  width:auto;
}

/* ハンバーガーメニュー - デスクトップでは非表示 */
.hamburger {
  display: none;
}

.site-nav{
  display:flex;
  align-items:center;
  gap:28px;
}

.site-nav a{
  color:#2F3844;
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  padding:10px 8px;
  position:relative;
  transition: color .2s;
  min-height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}

.site-nav a:hover{
  color:#1F5096;
  text-decoration:underline;
}

.site-nav a.is-current{
  color:#2F60C1;
}

.site-nav a.is-current::after{
  content:'';
  position:absolute;
  bottom:8px;
  left:8px;
  right:8px;
  height:2px;
  background:#2F60C1;
}

.site-nav a:focus-visible{
  outline:3px solid #8BB3F1;
  outline-offset:2px;
}

@media (prefers-reduced-motion: reduce){
  .site-header{
    transition: none;
  }
}

/* ===== ページヘッダー（タイトル） ===== */
header.page-hero{
  padding:40px 0 20px;
  text-align:center;
}

header.page-hero h1{
  font-size: clamp(22px, 3vw, 28px);
  font-weight:700;
  margin:0 0 20px;
  color:var(--ink);
}

/* ===== カテゴリチップ（角丸長方形） ===== */
.chip-nav{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:20px 14px;
  margin:0 0 32px;
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 20px;
  border-radius:var(--radius-chip);
  background:var(--chip-bg);
  color:var(--chip-text);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  border:1.5px solid var(--chip-border);
  transition: background .2s, color .2s, border-color .2s;
  cursor:pointer;
  min-height:44px;
}

.chip i{
  font-style:normal;
  opacity:.6;
  font-size:11px;
}

.chip.is-active{
  background:var(--chip-active);
  color:var(--chip-active-text);
  border-color:transparent;
}

.chip.is-active i{
  opacity:.9;
}

.chip:hover{
  opacity:.9;
}

/* ===== セクション見出し ===== */
.cat-title{
  font-size:20px;
  font-weight:700;
  text-align:center;
  margin:36px 0 16px;
  color:var(--ink);
  scroll-margin-top:80px;
}

section.faq-cat{
  scroll-margin-top:80px;
}

/* ===== FAQカード（Q/A一体型） ===== */
section.faq-cat{
  margin-bottom:32px;
}

.faq-card{
  margin:20px 0;
  border:1px solid var(--outer-border);
  border-radius:var(--radius);
  overflow:hidden;
}

/* Q行（質問）帯 */
.faq-q{
  background:var(--qband);
  padding:18px 20px;
  display:flex;
  align-items:center;
  gap:12px;
  border-bottom:1px solid var(--outer-border);
}

.q-badge{
  flex-shrink:0;
  width:24px;
  height:24px;
  border-radius:6px;
  display:inline-grid;
  place-items:center;
  background:var(--qbadge);
  color:var(--qbadge-text);
  font-weight:900;
  font-size:14px;
}

.q-text{
  font-weight:700;
  font-size:16px;
  color:var(--ink);
}

/* Aボックス（回答） */
.faq-a{
  background:var(--card);
  padding:18px 20px;
  color:var(--ink);
  font-size:16px;
  display:flex;
  gap:12px;
}

.a-badge{
  flex-shrink:0;
  width:24px;
  height:24px;
  border-radius:6px;
  display:inline-grid;
  place-items:center;
  background:var(--abadge);
  color:var(--abadge-text);
  font-weight:900;
  font-size:14px;
}

.a-content{
  flex:1;
}

.faq-a p{
  margin:0 0 12px;
}

.faq-a p:last-child{
  margin-bottom:0;
}

.faq-a a{
  color:var(--link);
  text-decoration:underline;
}

.faq-a a:hover{
  opacity:.8;
}

.faq-a table{
  width:100%;
  border-collapse:collapse;
  margin-top:8px;
  font-size:15px;
}

.faq-a th,
.faq-a td{
  border:1px solid #E4EEF8;
  padding:8px 10px;
  text-align:center;
}

.faq-a th{
  background:#F8FAFC;
  font-weight:700;
}

/* パーマリンクは非表示 */
.faq-permalink{
  display:none;
}

/* ===== 最下部ボタン ===== */
.all-btn-wrap{
  display:flex;
  justify-content:center;
  padding:48px 0 64px;
}

.btn-primary{
  appearance:none;
  background:var(--accent);
  color:var(--accent-text);
  border:none;
  font-weight:700;
  font-size:14px;
  padding:14px 20px;
  border-radius:var(--radius-btn);
  cursor:pointer;
  transition: opacity .2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary:hover{
  opacity:.9;
}

.btn-primary:active{
  opacity:.8;
}

/* ===== フッター ===== */
.site-footer{
  position:relative;
  min-height:240px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-top:48px;
  background-image: url('images/bg.jpg');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}

.site-footer::before{
  content:'';
  position:absolute;
  inset:0;
  background:var(--footer-overlay);
}

.site-footer .container{
  position:relative;
  z-index:1;
  text-align:center;
  padding:48px 20px;
}

.footer-links{
  display:flex;
  justify-content:center;
  gap:24px;
  margin-bottom:16px;
}

.footer-links a{
  color:var(--footer-link);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  padding:12px 8px;
  transition: text-decoration .2s;
}

.footer-links a:hover{
  text-decoration:underline;
}

.footer-links a:focus-visible{
  outline:3px solid #8BB3F1;
  outline-offset:2px;
}

.footer-copy{
  color:var(--footer-ink);
  font-size:13px;
  font-weight:400;
}

/* ===== アクセシビリティ ===== */
a:focus-visible,
button:focus-visible{
  outline: 3px solid var(--chip-active);
  outline-offset:2px;
}

.chip[aria-current="true"]{
  background:var(--chip-active);
  color:var(--chip-active-text);
}

/* ===== Scroll to Top Button ===== */
.scroll-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background-color: #f4c542;
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 1000;
  box-shadow: 0 4px 16px rgba(244, 197, 66, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.scroll-arrow {
  font-size: 16px;
  font-weight: bold;
  line-height: 1;
}

.scroll-text {
  font-size: 10px;
  font-weight: 600;
  line-height: 1;
  margin-top: 2px;
}

.scroll-to-top.show {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  background-color: #e6b73a;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(244, 197, 66, 0.4);
}

.scroll-to-top:focus-visible {
  outline: 3px solid #8BB3F1;
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .scroll-to-top {
    width: 50px;
    height: 50px;
    bottom: 20px;
    right: 20px;
  }

  .scroll-arrow {
    font-size: 14px;
  }

  .scroll-text {
    font-size: 9px;
  }
}

/* ===== レスポンシブ（640px未満） ===== */
@media (max-width:940px){
  .site-nav{
    gap:20px;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }

  .site-nav::-webkit-scrollbar{
    display:none;
  }
}

@media (max-width:640px){
  .site-header{
    height:60px;
  }

  .site-logo{
    padding:12px 8px;
  }

  .site-nav{
    gap:16px;
  }

  .site-nav a{
    font-size:14px;
    white-space:nowrap;
  }

  header.page-hero{
    padding:32px 0 20px;
  }

  .cat-title,
  section.faq-cat{
    scroll-margin-top:68px;
  }

  .faq-q{
    padding:16px 18px;
  }

  .faq-a{
    padding:16px 18px;
    flex-direction:row;
    align-items:flex-start;
  }

  .chip{
    padding:10px 16px;
    font-size:14px;
  }

  .site-footer{
    min-height:200px;
    margin-top:32px;
  }

  .site-footer .container{
    padding:36px 20px;
  }

  .footer-links{
    flex-direction:column;
    gap:16px;
  }
}