:root {
  --navy:       #1E1B18;
  --gold:       #B5956A;
  --gold-light: #D4C0A4;
  --white:      #FDFAF7;

  /* 派生値（透明度変化のみ — 色は4色厳守） */
  --navy-08:  rgba(30,27,24,0.08);
  --navy-12:  rgba(30,27,24,0.12);
  --gold-20:  rgba(181,149,106,0.20);
  --gold-30:  rgba(181,149,106,0.30);

  /* ── タイポグラフィ変数 ── */
  --f-label:   11px;   /* section-label / eyebrow */
  --f-nav:     13px;   /* ナビ・キャプション */
  --f-body:    15px;   /* 本文 */
  --f-sub:     13px;   /* 補助テキスト */
  --f-btn:     14px;   /* ボタン */
  --f-scroll:  10px;   /* スクロール表示 */

  --lh-body: 1.9;
  --ls-label:      0.12em;   /* base（about/news の section-label 用） */
  --ls-label-wide: 0.32em;   /* index hero eyebrow 用（PHASE 7 集約） */
  --ls-label-mid:  0.18em;   /* privacy hero section-label 用（PHASE 7 集約） */
  --ls-btn:        0.10em;

  /* ロゴ高さ（index ページの SVG ロゴで使用、メディアクエリで段階変化） */
  --logo-h: 34px;            /* PC（PHASE 7 集約） */

  /* エラー色（PHASE 13-B4 集約） */
  --err: #EF4444;
}
* { margin:0; padding:0; box-sizing:border-box; }
img { max-width:100%; height:auto; }
html { scroll-behavior:smooth; }
body {
  font-family: 'Noto Serif JP', serif;
  background: var(--white); color: var(--navy);
  overflow-x: hidden; min-height: 100vh;
  display: flex; flex-direction: column;
}

/* Accessibility: skip-link (WCAG 2.1) */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  z-index: 9999;
  padding: 8px 16px;
  background: var(--navy);
  color: var(--white);
  text-decoration: none;
  border-radius: 0 0 4px 0;
  transition: top 0.15s ease;
}
.skip-link:focus {
  top: 0;
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* HEADER */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 40px;
  background: rgba(253,250,247,0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gold-20);
  transition: padding 0.3s ease, box-shadow 0.3s ease;
}
.logo { display:flex; align-items:center; text-decoration:none; }
nav { display:flex; align-items:center; gap:36px; }
nav a {
  font-family: 'Noto Serif JP', serif;
  font-size: var(--f-nav); font-weight:400; color:var(--navy);
  text-decoration:none; letter-spacing:0.08em;
  position:relative; padding-bottom:2px;
}
nav a::after {
  content:''; position:absolute; bottom:0; left:0;
  width:0; height:1px; background:var(--gold); transition:width 0.3s ease;
}
nav a:hover::after { width:100%; }
nav a.nav-cta {
  background:var(--gold); color:var(--white);
  padding:9px 20px; border-radius:2px;
  font-size:var(--f-nav); letter-spacing:0.08em;
  transition:background 0.3s ease;
}
nav a.nav-cta:hover { background:var(--gold-light); }
nav a.nav-cta::after { display:none; }

/* PHASE 14a-F6: nav-racs（RACSリンク強調・最上位配置） */
nav a.nav-racs {
  border: 1.5px solid var(--gold);
  color: var(--gold);
  padding: 7px 16px;
  border-radius: 2px;
  font-weight: 700;
  letter-spacing: 0.10em;
  transition: background 0.3s ease, color 0.3s ease;
}
nav a.nav-racs:hover { background: var(--gold); color: var(--white); }
nav a.nav-racs::after { display: none; }
.hamburger { display:none; flex-direction:column; gap:5px; cursor:pointer; padding:4px; }
.hamburger span { display:block; width:24px; height:1.5px; background:var(--navy); }

/* MOBILE MENU */
.mobile-menu {
  display:none; position:fixed; inset:0;
  background:rgba(30,27,24,0.97); z-index:99;
  flex-direction:column; align-items:center; justify-content:center; gap:36px;
}
.mobile-menu.open { display:flex; }
.mobile-menu a {
  font-family: 'Noto Serif JP', serif; font-size:20px;
  color:var(--white); text-decoration:none; letter-spacing:0.1em;
}
.mobile-menu a:hover { color:var(--gold); }

/* PHASE 14a-F6: mobile-menu-racs（モバイルメニューRACSリンク強調） */
.mobile-menu a.mobile-menu-racs {
  border: 1.5px solid var(--gold);
  color: var(--gold);
  padding: 10px 32px;
  border-radius: 2px;
  font-weight: 700;
}
.mobile-close {
  position:absolute; top:24px; right:30px;
  font-size:24px; color:var(--white); cursor:pointer;
  background:none; border:none;
}

/* PAGE HERO */
.page-hero {
  padding: 140px 8% 80px;
  background: var(--gold-light);
  position: relative; overflow: hidden;
}
.page-hero::after {
  content:''; position:absolute; top:-60px; right:-60px;
  width:300px; height:300px;
  border:1px solid rgba(181,149,106,0.12);
  border-radius:50%;
}
.page-eyebrow {
  font-family: 'Noto Serif JP', serif;
  font-size: 15px; letter-spacing: var(--ls-label); color: var(--navy);
  margin-bottom: 18px; text-transform: uppercase;
  font-weight: 700; text-decoration: underline; text-underline-offset: 4px;
}
.page-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(32px, 4vw, 44px); font-weight: 700; line-height: 1.5;
  color: var(--gold); margin-bottom: 16px; letter-spacing: 0.06em;
}
.breadcrumb {
  margin-top:24px; display:flex; align-items:center; gap:10px;
  font-size:var(--f-sub); color: var(--navy);
}
.breadcrumb a { color: var(--white); text-decoration:none; }
.breadcrumb a:hover { color:var(--gold); }
.breadcrumb-sep { opacity:0.4; }

/* FORM SECTION */
.form-section {
  flex:1; padding:80px 8%;
  max-width: 780px; margin: 0 auto; width:100%;
}
.form-intro {
  font-size:var(--f-body); line-height:var(--lh-body);
  color:var(--navy); margin-bottom:52px;
  padding-bottom:32px;
  border-bottom:1px solid var(--navy-08);
}
.form-intro strong {
  display:block; font-family:'Noto Serif JP',serif;
  font-size:20px; font-weight:600; margin-bottom:12px; color:var(--navy);
}

/* FORM ELEMENTS */
.form-group { margin-bottom:28px; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:20px; margin-bottom:28px; }
label {
  display:block; font-size:var(--f-sub); font-weight:500;
  color:var(--navy); margin-bottom:8px; letter-spacing:0.04em;
}
label .required {
  font-size:10px; background:var(--gold); color:var(--white);
  padding:2px 6px; border-radius:1px; margin-left:8px;
  vertical-align:middle; letter-spacing:0.05em;
}
label .optional {
  font-size:10px; color:var(--gold); margin-left:8px;
  vertical-align:middle;
}
input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width:100%; padding:13px 16px;
  border:1px solid rgba(30,27,24,0.18);
  border-radius:2px; background:var(--white);
  font-family: 'Noto Serif JP', serif;
  font-size:var(--f-body); color:var(--navy);
  transition:border-color 0.2s ease, box-shadow 0.2s ease;
  appearance:none; -webkit-appearance:none;
  outline:none;
}
input:focus, select:focus, textarea:focus {
  border-color:var(--gold);
  box-shadow:0 0 0 3px rgba(181,149,106,0.12);
}
select {
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%231E1B18' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 14px center;
  padding-right:40px; cursor:pointer;
}
textarea { resize:vertical; min-height:160px; line-height:var(--lh-body); }
::placeholder { color: var(--navy); font-size:var(--f-sub); }

/* PRIVACY */
.privacy-box {
  background:rgba(30,27,24,0.03); border:1px solid var(--navy-08);
  border-radius:2px; padding:24px 28px; margin-bottom:32px;
}
.privacy-box h4 {
  font-family:'Noto Serif JP',serif; font-size:14px;
  font-weight:600; margin-bottom:12px; color:var(--navy);
}
.privacy-box p {
  font-size:var(--f-sub); line-height:1.8; color: var(--navy);
}
.checkbox-group {
  display:flex; align-items:flex-start; gap:12px; margin-top:20px;
}
.checkbox-group input[type="checkbox"] {
  width:18px; height:18px; flex-shrink:0; margin-top:2px;
  accent-color:var(--gold); cursor:pointer;
  border:1px solid rgba(30,27,24,0.3);
}
.checkbox-group label {
  font-size:var(--f-sub); color:var(--navy);
  cursor:pointer; margin:0; line-height:1.7;
}
.checkbox-group label a {
  color:var(--gold); text-decoration:underline;
}

/* SUBMIT */
.form-submit {
  text-align:center; padding-top:12px;
}
.submit-btn {
  display:inline-block; background:var(--gold); color:var(--white);
  padding:16px 72px; border:none; border-radius:2px;
  font-family:'Noto Serif JP',serif; font-size:var(--f-btn);
  font-weight:600; letter-spacing:var(--ls-btn);
  cursor:pointer; transition: background 0.3s ease, border-color 0.3s ease;
  border:1px solid var(--gold);
}
.submit-btn:hover { background:var(--gold-light); border-color:var(--gold-light); }
.submit-note {
  font-size:11px; color: var(--navy);
  margin-top:16px; line-height:1.7;
}

/* SUCCESS MESSAGE */
.success-msg {
  display:none; text-align:center; padding:60px 20px;
}
.success-msg.show { display:block; }
.success-icon {
  width:64px; height:64px; border-radius:50%;
  background:var(--gold-light); display:inline-flex;
  align-items:center; justify-content:center; margin-bottom:24px;
}
.success-icon svg { width:28px; height:28px; stroke:var(--white); fill:none; stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
.success-msg h3 { font-family:'Noto Serif JP',serif; font-size:24px; font-weight:600; margin-bottom:16px; }
.success-msg p { font-size:var(--f-body); line-height:var(--lh-body); color: var(--navy); max-width:500px; margin:0 auto 32px; }
.back-link {
  display:inline-block; color:var(--gold); font-size:var(--f-btn);
  text-decoration:none; border-bottom:1px solid var(--gold);
  padding-bottom:2px; letter-spacing:0.08em;
}

/* FOOTER */
footer {
  background: var(--navy); padding: 56px 8% 36px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 24px;
  border-top: 1px solid rgba(253,250,247,0.06); text-align: center;
}
.footer-logo-link { text-decoration: none; display: block; }
.footer-logo { display: flex; flex-direction: column; align-items: center; }
.footer-nav {
  display: flex; align-items: center; justify-content: center;
  gap: 24px; margin: 20px 0 16px; flex-wrap: wrap;
}
.footer-nav a {
  font-size: 11px; color: rgba(253,250,247,0.65);
  text-decoration: none; letter-spacing: 0.08em; transition: color 0.2s;
}
.footer-nav a:hover { color: var(--gold); }

/* PHASE 14a-F7: footer-racs-nav（RACSサイトへの導線強化） */
.footer-racs-nav {
  display: flex; align-items: center; justify-content: center;
  gap: 14px; margin: 0 0 16px; flex-wrap: wrap;
  padding: 14px 24px; border-top: 1px solid rgba(253,250,247,0.10);
  border-bottom: 1px solid rgba(253,250,247,0.10);
}
.footer-racs-label {
  font-size: 11px; color: var(--gold);
  letter-spacing: 0.10em; font-weight: 700;
  margin-right: 6px;
}
.footer-racs-nav a {
  font-size: 11px; color: rgba(253,250,247,0.85);
  text-decoration: none; letter-spacing: 0.08em; transition: color 0.2s;
}
.footer-racs-nav a:hover { color: var(--gold); }
@media (max-width: 768px) {
  .footer-racs-nav { gap: 10px 14px; padding: 12px 16px; }
  .footer-racs-label { width: 100%; text-align: center; margin: 0 0 4px; }
}

.footer-copy { font-size: 11px; color: var(--white); letter-spacing: 0.08em; }

/* ── Utilities (v9 additions) ── */
/* Header/Footer SVG logos (default sizes) */
.logo > svg { height:40px; width:auto; display:block; }
.footer-logo > svg { height:150px; width:auto; display:block; }
/* Honeypot (spam prevention) */
.honeypot { position:absolute; left:-9999px; }
/* Form field error state (M-2: replaces JS '#f17' hardcode) */
/* Includes :focus selector to override input:focus border-color with equal specificity */
.field-error,
.field-error:focus {
  outline:2px solid var(--err);
  border-color:var(--err);
  box-shadow:none;
}

@media (max-width:1024px) {
  header { padding:14px 24px; }
  nav { display:none; }
  .hamburger { display:flex; }
  .form-row { grid-template-columns:1fr; }
  .form-section { padding:60px 6%; }
}

/* ══════════════════════════════
   ACCESSIBILITY: focus-visible（v20d）
   キーボードフォーカス時の可視化保証。
   マウスクリック時は既存スタイルのまま。
   ══════════════════════════════ */
a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible,
summary:focus-visible,
.hamburger:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}
/* マウスでのフォーカスは枠を出さない */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible),
[role="button"]:focus:not(:focus-visible),
summary:focus:not(:focus-visible),
.hamburger:focus:not(:focus-visible) {
  outline: none;
}

/* ===== EMAIL ICON (C-14: about/privacy 共通、SVG画像のインライン配置用) ===== */
.email-icon{height:16px;width:auto;vertical-align:-3px;display:inline}

/* ══════════════════════════════
   ACCESSIBILITY: prefers-reduced-motion (C-13)
   OS設定で「動きを減らす」が有効な場合、transition/animationを最小化
   ══════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  /* 無限ループ系・スクロール系のみ停止（穏やかな単発アニメは維持） */
  .hero-scroll {
    animation: none !important;
  }
  html {
    scroll-behavior: auto !important;
  }
}