/* =========================================================
   common.css — 全ページ共通（変数・ベース・ヘッダー・ナビ・ボタン・見出し・フッター）
   並び：ベース → 768px以下 → 480px以下
   ========================================================= */

:root {
  /* 色：アクセントを変える場合は --c-accent / --c-accent-deep の2つ */
  --c-bg: #f4f1ea;          /* オフホワイト */
  --c-bg-2: #e9e4d8;        /* 少し濃い面 */
  --c-ink: #23251f;         /* 文字（墨色） */
  --c-ink-2: #5e6058;       /* 補足の文字 */
  --c-line: rgba(35, 37, 31, .16);
  --c-accent: #6d7b5b;      /* オリーブ／セージ */
  --c-accent-deep: #3b4535; /* 濃いオリーブ（お問い合わせ・フッター） */
  --c-on-dark: #f4f1ea;

  /* フォント：Webフォントを使う場合は header.php に <link> を足して、ここを書き換え */
  --font-display: "Cormorant Garamond", "Baskerville", "Hoefler Text", "Garamond", "Times New Roman", serif;
  --font-serif: "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  --font-sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Meiryo", "Noto Sans JP", sans-serif;

  --header-h: 76px;
  --gutter: clamp(16px, 2.4vw, 32px);
  --container: 1200px;
  --radius: 6px;
  --ease: cubic-bezier(.7, 0, .2, 1);
  --ease-out: cubic-bezier(.2, .8, .2, 1);
}

/* ---------- ベース ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 2;
  letter-spacing: .04em;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }
ul { padding: 0; list-style: none; }
address { font-style: normal; }
button { font: inherit; color: inherit; }
main:focus { outline: none; }
:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: 8px; left: 8px; z-index: 200;
  padding: 8px 16px; background: var(--c-ink); color: var(--c-on-dark);
  text-decoration: none; transform: translateY(-150%); transition: transform .2s;
}
.skip-link:focus { transform: none; }

.container { width: min(100% - var(--gutter) * 2, var(--container)); margin-inline: auto; }
.main--offset { padding-top: var(--header-h); }   /* 子ページ用：固定ヘッダーの高さ分の余白 */

/* ---------- 見出し ---------- */
.section-label {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 16px;
  font-family: var(--font-display); font-size: 15px; font-style: italic;
  letter-spacing: .12em; color: var(--c-accent);
}
.section-label::before { content: ""; width: 32px; height: 1px; background: currentColor; }
.section-title {
  font-family: var(--font-serif); font-weight: 500;
  font-size: clamp(26px, 3vw, 38px); line-height: 1.5; letter-spacing: .08em;
}
.section-head { margin-bottom: clamp(40px, 6vw, 72px); }
.section-head--row { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px 48px; flex-wrap: wrap; }
.section-head__lead { color: var(--c-ink-2); max-width: 30em; }

/* ---------- ボタン ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 14px;
  min-height: 56px; padding: 0 36px;
  border: 1px solid var(--c-ink); border-radius: 999px;
  background: var(--c-ink); color: var(--c-on-dark);
  font-size: 14px; letter-spacing: .12em; text-decoration: none;
  overflow: hidden; isolation: isolate;
  transition: color .4s var(--ease-out);
}
.btn::before {   /* ホバーで下から色が満ちる */
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--c-accent);
  transform: translateY(101%); transition: transform .5s var(--ease-out);
}
.btn::after { content: ""; width: 7px; height: 7px; border-top: 1px solid; border-right: 1px solid; transform: rotate(45deg); }
.btn:hover::before { transform: none; }
.btn:hover { border-color: var(--c-accent); }
.btn--sm { min-height: 42px; padding: 0 22px; font-size: 12px; }
.btn--sm::after { display: none; }

/* ---------- ヘッダー ---------- */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  height: var(--header-h);
  transition: background-color .4s, box-shadow .4s;
}
.site-header.is-scrolled,
.site-header.is-solid {
  background: rgba(244, 241, 234, .86);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--c-line);
}
.site-header__inner {
  display: flex; align-items: center; gap: 32px;
  height: 100%; padding-inline: calc(var(--gutter) + 8px);
}
.logo { display: block; flex-shrink: 0; margin-right: auto; text-decoration: none; }
.logo img { width: auto; height: 46px; }
.logo--text { font-family: var(--font-display); font-size: 24px; letter-spacing: .14em; }

.nav ul { display: flex; gap: clamp(20px, 2.6vw, 40px); }
.nav a {
  position: relative; display: block; padding: 6px 0;
  font-family: var(--font-display); font-size: 15px; letter-spacing: .14em; line-height: 1.4;
  text-decoration: none;
}
.nav a small { display: none; }
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .4s var(--ease-out);
}
.nav a:hover::after { transform: scaleX(1); transform-origin: left; }

.nav-toggle { display: none; }

/* ---------- フッター ---------- */
.site-footer { background: #23281f; color: var(--c-on-dark); }
.site-footer__inner {
  display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap;
  width: min(100% - var(--gutter) * 2, var(--container)); margin-inline: auto;
  padding: 72px 0 56px;
}
.site-footer__name { margin-bottom: 20px; font-family: var(--font-display); font-size: 26px; letter-spacing: .16em; line-height: 1.4; }
.site-footer address { font-size: 13px; line-height: 1.9; opacity: .8; }
.site-footer address p + p { margin-top: 8px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { text-decoration: underline; text-underline-offset: 4px; }
.site-footer__sns { display: flex; gap: 24px; margin-top: 24px; font-family: var(--font-display); font-size: 15px; letter-spacing: .1em; }
.site-footer__nav { display: grid; grid-template-columns: repeat(2, auto); gap: 10px 56px; font-family: var(--font-display); font-size: 15px; letter-spacing: .14em; }
.site-footer__copy {
  padding: 20px var(--gutter); border-top: 1px solid rgba(244, 241, 234, .14);
  text-align: center; font-size: 11px; letter-spacing: .12em; opacity: .6;
}

/* ---------- スクロールで表示（data-reveal） ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(32px); transition: opacity 1s var(--ease-out), transform 1s var(--ease-out); }
.js [data-reveal].is-inview { opacity: 1; transform: none; }

/* =========================================================
   768px以下
   ========================================================= */
@media (max-width: 768px) {
  :root { --header-h: 64px; }
  body { font-size: 14px; }
  .site-header__inner { gap: 12px; padding-inline: var(--gutter); }
  .logo img { height: 38px; }
  .header-cta { position: relative; z-index: 2; }

  .nav-toggle {
    position: relative; z-index: 2; display: block;
    width: 44px; height: 44px; padding: 0; border: 0; background: none; cursor: pointer;
  }
  .nav-toggle__bar,
  .nav-toggle__bar::before,
  .nav-toggle__bar::after {
    position: absolute; left: 11px; width: 22px; height: 1px; background: var(--c-ink);
    transition: transform .4s var(--ease-out), background-color .2s;
  }
  .nav-toggle__bar { top: 50%; }
  .nav-toggle__bar::before, .nav-toggle__bar::after { content: ""; left: 0; }
  .nav-toggle__bar::before { transform: translateY(-4px); }
  .nav-toggle__bar::after { transform: translateY(4px); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { transform: rotate(20deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar::after { transform: rotate(-20deg); }

  .nav {
    position: fixed; inset: 0; z-index: 1;
    display: flex; align-items: center;
    padding: calc(var(--header-h) + 24px) calc(var(--gutter) + 16px) 48px;
    background: var(--c-bg);
    clip-path: inset(0 0 100% 0); visibility: hidden;
    transition: clip-path .6s var(--ease), visibility 0s .6s;
  }
  .nav.is-open { clip-path: inset(0); visibility: visible; transition: clip-path .6s var(--ease); }
  .nav ul { flex-direction: column; gap: 0; width: 100%; }
  .nav li { border-bottom: 1px solid var(--c-line); }
  .nav a { display: flex; justify-content: space-between; align-items: baseline; padding: 18px 0; font-size: 28px; }
  .nav a small { display: block; font-family: var(--font-sans); font-size: 12px; color: var(--c-ink-2); letter-spacing: .1em; }
  .nav a::after { display: none; }
  .is-nav-open { overflow: hidden; }
  .is-nav-open .site-header { background: var(--c-bg); box-shadow: none; }

  .site-footer__inner { padding: 56px 0 40px; }
}

/* =========================================================
   480px以下
   ========================================================= */
@media (max-width: 480px) {
  .header-cta { padding: 0 14px; font-size: 11px; min-height: 36px; }
  .btn { width: 100%; }
  .btn--sm { width: auto; }
  .site-footer__nav { gap: 10px 32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}