/* ============================================================
   星縁株式会社 サイト共通スタイル

   ▼ フォントの決まり（これを間違えると日本語のつもりで中国語字形が出る）
     1. 和文は JP 系だけを書く
        Noto Sans JP / Noto Serif JP / ヒラギノ / 游ゴシック / 游明朝 / メイリオ
     2. SC・TC・HK・KR・WenQuanYi・PingFang SC・Microsoft YaHei は1文字も書かない
     3. sans-serif / serif に落ちる前に、必ず和文フォントを1つ以上挟む
     4. 欧文専用の変数にも、末尾に和文スタックを足しておく
        （肩書き・ボタン・タグなどに和文が流れ込むため。落とし穴集28番）

   確認は必ず機械で：
     python ..\_playbook\_tools\check_site.py . --demo
   ============================================================ */

:root {
  /* --- フォント --- */
  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic Medium",
               "Yu Gothic", "Meiryo", sans-serif;
  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho",
                "YuMincho", "Noto Sans JP", serif;
  /* 欧文用。末尾に和文スタックを足してあるので、和文が流れ込んでも安全 */
  --font-latin: "Optima", "Palatino Linotype", "Georgia", "Times New Roman",
                "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;

  /* --- 色（ロゴ準拠：黒地に金） --- */
  --c-bg:        #0a0a0c;
  --c-bg-soft:   #121216;
  --c-bg-panel:  #16161b;
  --c-text:      #ece7dd;
  --c-text-dim:  #a9a49b;
  --c-gold:      #d9b978;
  --c-gold-soft: #b99a5f;
  --c-line:      rgba(217, 185, 120, .22);
  --c-line-soft: rgba(236, 231, 221, .12);

  /* --- 寸法 --- */
  --w-wide:    76rem;
  --w-content: 42rem;   /* 日本語は1行40〜45字 */
  --pad-x:     clamp(1.25rem, 5vw, 3.5rem);
}

*, *::before, *::after { box-sizing: border-box; }

html { font-size: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(.95rem, .3vw + .88rem, 1.0rem);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.9;
  font-feature-settings: "palt";
  letter-spacing: .04em;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--c-gold); text-decoration: none; }
a:hover { color: #efd9a6; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

.skip { position: absolute; left: -9999px; }
.skip:focus {
  position: fixed; top: .5rem; left: .5rem; z-index: 999;
  display: inline-block; padding: .6rem 1.1rem;
  background: var(--c-gold); color: #0a0a0c; border-radius: 2px;
}

/* ------------------------------------------------ レイアウト部品 */
.wrap  { max-width: var(--w-wide);    margin-inline: auto; padding-inline: var(--pad-x); }
.prose { max-width: var(--w-content); margin-inline: auto; }

.section { padding-block: clamp(4rem, 9vw, 8rem); }
.section--soft  { background: var(--c-bg-soft); }
.section--line  { border-top: 1px solid var(--c-line-soft); }

/* 章のラベル（EN） */
.kicker {
  font-family: var(--font-latin);
  font-size: .72rem;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--c-gold-soft);
  margin: 0 0 1.1rem;
}

.lead { color: var(--c-text-dim); }

/* ------------------------------------------------ 見出し */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.55;
  letter-spacing: .06em;
  text-wrap: balance;      /* 見出しの最終行に1文字だけ残るのを避ける */
  word-break: normal;
  overflow-wrap: anywhere;
  line-break: strict;      /* 日本語の禁則処理 */
}
h1 { font-size: clamp(1.65rem, 4.2vw, 2.7rem); margin: 0 0 1.5rem; }
h2 { font-size: clamp(1.35rem, 2.9vw, 2.0rem); margin: 0 0 1.4rem; }
h3 { font-size: clamp(1.08rem, 1.9vw, 1.28rem); margin: 2.4rem 0 .7rem; }
h4 { font-size: 1rem; margin: 1.8rem 0 .5rem; }

p { margin: 0 0 1.5rem; }

.rule {
  width: 2.5rem; height: 1px; border: 0;
  background: var(--c-gold); margin: 0 0 1.8rem;
}
.rule--center { margin-inline: auto; }

/* ------------------------------------------------ ヘッダー */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 10, 12, .86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-line-soft);
}
.site-header__inner {
  max-width: var(--w-wide); margin-inline: auto;
  padding: .7rem var(--pad-x);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand { display: flex; align-items: center; gap: .7rem; }
.brand img { width: 38px; height: 38px; border-radius: 50%; }
.brand__name {
  font-family: var(--font-serif);
  font-size: 1.05rem; letter-spacing: .22em; color: var(--c-text);
}
.brand__en {
  display: block; font-family: var(--font-latin);
  font-size: .58rem; letter-spacing: .26em; color: var(--c-gold-soft);
}

.nav ul { display: flex; gap: clamp(1rem, 2.2vw, 2.1rem); list-style: none; margin: 0; padding: 0; }
.nav a {
  color: var(--c-text); font-size: .82rem; letter-spacing: .14em;
  padding-block: .35rem; border-bottom: 1px solid transparent;
}
.nav a:hover, .nav a[aria-current="page"] {
  color: var(--c-gold); border-bottom-color: var(--c-gold);
}

.nav-toggle {
  display: none; background: none; border: 1px solid var(--c-line);
  color: var(--c-text); border-radius: 2px; padding: .4rem .7rem;
  font-size: .78rem; letter-spacing: .1em; font-family: var(--font-sans);
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; inset: 100% 0 auto 0;
    background: #0d0d10; border-bottom: 1px solid var(--c-line-soft);
    display: none;
  }
  .nav[data-open="true"] { display: block; }
  .nav ul { flex-direction: column; gap: 0; padding: .5rem var(--pad-x) 1.2rem; }
  .nav a { display: block; padding: .8rem 0; border-bottom: 1px solid var(--c-line-soft); }
}

/* ------------------------------------------------ ヒーロー */
.hero {
  position: relative;
  min-height: clamp(30rem, 82vh, 46rem);
  display: grid; place-items: center; text-align: center;
  padding: 5rem var(--pad-x);
  background:
    radial-gradient(ellipse 60% 55% at 50% 42%, rgba(217,185,120,.10), transparent 70%),
    var(--c-bg);
  overflow: hidden;
}
.hero__stars {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
}
.hero__inner { position: relative; max-width: 46rem; }
.hero__mark { width: clamp(84px, 16vw, 132px); margin: 0 auto 2.2rem; border-radius: 50%; }
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 8vw, 4.6rem);
  letter-spacing: .3em; text-indent: .3em;
  margin: 0 0 1.6rem; color: var(--c-text);
}
.hero__tagline {
  font-family: var(--font-serif);
  font-size: clamp(.95rem, 2.2vw, 1.2rem);
  letter-spacing: .2em; color: var(--c-gold); margin: 0 0 2rem;
}
.hero__sub { color: var(--c-text-dim); font-size: clamp(.82rem, 2.2vw, .9rem); margin: 0; }
.hero__en {
  font-family: var(--font-latin);
  font-size: .68rem; letter-spacing: .4em; color: var(--c-gold-soft);
  margin: 0 0 1.4rem;
}

/* ------------------------------------------------ 写真 */
.figure { margin: 0; }
.figure img {
  width: 100%; height: auto;
  border: 1px solid var(--c-line);
}
.figure figcaption {
  margin-top: .8rem; font-size: .75rem; letter-spacing: .12em;
  color: var(--c-text-dim); line-height: 1.7;
}

/* 全幅の帯。上下を黒に落として、地の色となじませる */
.band { position: relative; }
.band img {
  width: 100%; height: clamp(15rem, 44vw, 32rem);
  object-fit: cover; object-position: center 38%;
}
.band::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(to bottom,
    rgba(10,10,12,.72) 0%, rgba(10,10,12,.12) 34%,
    rgba(10,10,12,.30) 68%, rgba(10,10,12,.92) 100%);
}
.band__cap { position: absolute; left: 0; right: 0; bottom: clamp(1.4rem, 3.5vw, 3rem); z-index: 1; }
.band__cap p {
  margin: 0; font-family: var(--font-serif);
  font-size: clamp(.98rem, 2.3vw, 1.4rem);
  letter-spacing: .18em; color: var(--c-text);
}

/* 画像とテキストの2カラム */
.media {
  display: grid; align-items: center;
  gap: clamp(1.6rem, 4vw, 3.4rem);
  grid-template-columns: minmax(0, .8fr) minmax(0, 1fr);
}
.media--rev { grid-template-columns: minmax(0, 1fr) minmax(0, .8fr); }
.media__body > :last-child { margin-bottom: 0; }
.media__body .timeline { margin-top: 1.4rem; }

@media (max-width: 820px) {
  .media, .media--rev { grid-template-columns: 1fr; }
  .media--rev .figure { order: -1; }
}

/* ------------------------------------------------ カード・グリッド */
.grid { display: grid; gap: clamp(1.2rem, 3vw, 2.2rem); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }

.card {
  background: var(--c-bg-panel);
  border: 1px solid var(--c-line-soft);
  padding: clamp(1.6rem, 3.2vw, 2.6rem);
}
.card__no {
  font-family: var(--font-latin);
  font-size: .78rem; letter-spacing: .3em; color: var(--c-gold-soft);
  display: block; margin-bottom: .8rem;
}
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

/* 対比（既存の囲碁施設 / 星縁） */
.compare { display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); }
.compare__col { padding: clamp(1.5rem, 3vw, 2.2rem); border: 1px solid var(--c-line-soft); }
.compare__col--seien { border-color: var(--c-line); background: rgba(217,185,120,.05); }
.compare__label {
  font-size: .78rem; letter-spacing: .2em; color: var(--c-text-dim);
  margin: 0 0 .9rem; padding-bottom: .6rem; border-bottom: 1px solid var(--c-line-soft);
}
.compare__col--seien .compare__label { color: var(--c-gold); }

/* ------------------------------------------------ 定義リスト（会社概要・営業情報） */
.spec { border-top: 1px solid var(--c-line-soft); margin: 0; }
.spec > div {
  display: grid; grid-template-columns: 9rem 1fr;
  gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--c-line-soft);
}
.spec dt { color: var(--c-gold-soft); font-size: .85rem; letter-spacing: .12em; margin: 0; }
.spec dd { margin: 0; }
@media (max-width: 620px) {
  .spec > div { grid-template-columns: 1fr; gap: .25rem; }
}

/* 横スクロールする表（ペアポイント換算表） */
.scroll-x { overflow-x: auto; margin: 1.5rem 0; -webkit-overflow-scrolling: touch; }
.ptable { border-collapse: collapse; font-size: .82rem; min-width: 46rem; }
.ptable th, .ptable td {
  border: 1px solid var(--c-line-soft);
  padding: .5rem .7rem; text-align: center; white-space: nowrap;
}
.ptable th[scope="row"] {
  text-align: left; color: var(--c-gold-soft);
  position: sticky; left: 0; background: var(--c-bg-soft);
}
.ptable tr:first-child th { color: var(--c-text); font-weight: 500; }

/* 時刻の列は少し狭く */
.spec--time > div { grid-template-columns: 11rem 1fr; }
@media (max-width: 620px) { .spec--time > div { grid-template-columns: 1fr; } }

/* ------------------------------------------------ 年表 */
.timeline { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--c-line); }
.timeline li { position: relative; padding: 0 0 1.8rem 1.6rem; }
.timeline li::before {
  content: ""; position: absolute; left: -4px; top: .75rem;
  width: 7px; height: 7px; border-radius: 50%; background: var(--c-gold);
}
.timeline time {
  display: block; font-family: var(--font-latin);
  font-size: .78rem; letter-spacing: .18em; color: var(--c-gold-soft);
}

/* ------------------------------------------------ FAQ */
.faq { border-top: 1px solid var(--c-line-soft); }
.faq details { border-bottom: 1px solid var(--c-line-soft); }
.faq summary {
  cursor: pointer; list-style: none; padding: 1.2rem 2rem 1.2rem 0;
  position: relative; font-family: var(--font-serif); font-size: 1rem;
  letter-spacing: .05em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "＋"; position: absolute; right: 0; top: 1.15rem;
  color: var(--c-gold); font-size: .9rem;
}
.faq details[open] summary::after { content: "−"; }
.faq .faq__a { padding: 0 0 1.4rem; color: var(--c-text-dim); margin: 0; }

/* ------------------------------------------------ CTA・ボタン */
.btn {
  display: inline-block;
  padding: .85rem 2.2rem;
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  font-family: var(--font-sans);
  font-size: .85rem; letter-spacing: .2em;
  transition: background-color .3s ease, color .3s ease;
}
.btn:hover { background: var(--c-gold); color: #0a0a0c; }
.btn--fill { background: var(--c-gold); color: #0a0a0c; }
.btn--fill:hover { background: #efd9a6; color: #0a0a0c; }

.cta { text-align: center; }
.cta .btn { margin: .4rem; }

/* 大会・サロンへの誘導（2枚） */
.axis { display: grid; gap: 1px; grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
        background: var(--c-line-soft); border: 1px solid var(--c-line-soft); }
.axis__item {
  background: var(--c-bg); padding: clamp(2rem, 4vw, 3.4rem);
  display: flex; flex-direction: column;
}
.axis__item:hover { background: var(--c-bg-panel); }
.axis__item .btn { align-self: flex-start; margin-top: auto; }

/* ------------------------------------------------ フォーム */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* 自動投稿よけ。人には見せないが、display:none だと素通りされることがある */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form__row { margin-bottom: 1.8rem; }
.form__row label {
  display: block; margin-bottom: .55rem;
  font-size: .86rem; letter-spacing: .1em; color: var(--c-text);
}
.req {
  display: inline-block; margin-left: .5rem; padding: .05rem .5rem;
  font-size: .66rem; letter-spacing: .1em;
  color: var(--c-gold); border: 1px solid var(--c-line);
}

.form input[type="text"],
.form input[type="email"],
.form select,
.form textarea {
  width: 100%; padding: .8rem .9rem;
  background: var(--c-bg-panel);
  border: 1px solid var(--c-line-soft);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: 1rem;              /* iOSで拡大されないよう16px相当を保つ */
  line-height: 1.7; letter-spacing: .04em;
  border-radius: 0; appearance: none;
}
.form textarea { resize: vertical; min-height: 11rem; }
.form select {
  background-image: linear-gradient(45deg, transparent 50%, var(--c-gold) 50%),
                    linear-gradient(135deg, var(--c-gold) 50%, transparent 50%);
  background-position: right 1.15rem center, right .85rem center;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 2.4rem;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--c-gold);
  background: #1b1b21;
}
.form input:user-invalid, .form textarea:user-invalid, .form select:user-invalid {
  border-color: #c98b7a;
}
.form__hint { margin: .5rem 0 0; font-size: .76rem; color: var(--c-text-dim); }

.form__row--check label {
  display: flex; align-items: flex-start; gap: .7rem;
  font-size: .9rem; color: var(--c-text-dim); cursor: pointer;
}
.form__row--check input[type="checkbox"] {
  flex: 0 0 auto; width: 1.15rem; height: 1.15rem; margin-top: .3rem;
  accent-color: var(--c-gold);
}

.form__err {
  margin: 0 0 1.2rem; padding: .8rem 1rem;
  border-left: 2px solid #c98b7a; background: rgba(201,139,122,.08);
  color: #e7c9c0; font-size: .88rem;
}
.form__submit { margin-top: 2.2rem; }
.form__submit .btn { cursor: pointer; font-size: .9rem; padding: .95rem 3rem; }
.form__submit .btn[disabled] { opacity: .5; cursor: progress; }

/* 公式LINEのQRコード */
.figure--qr { margin-top: 1.6rem; max-width: 220px; }
.figure--qr img { background: #fff; padding: .6rem; }

/* ------------------------------------------------ 注記 */
.note {
  border-left: 2px solid var(--c-gold); padding: .2rem 0 .2rem 1.1rem;
  color: var(--c-text-dim); font-size: .88rem;
}

/* ------------------------------------------------ フッター */
.site-footer {
  border-top: 1px solid var(--c-line-soft);
  padding: clamp(3rem, 6vw, 4.5rem) 0 2.5rem;
  background: var(--c-bg-soft);
  font-size: .85rem;
}
.site-footer .wrap > div:first-child {
  display: grid; gap: 2.5rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  margin-bottom: 2.5rem;
}
.site-footer h2 {
  font-size: .78rem; letter-spacing: .2em; color: var(--c-gold-soft);
  font-family: var(--font-sans); margin: 0 0 .9rem;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: .55rem; }
.site-footer a { color: var(--c-text-dim); }
.site-footer a:hover { color: var(--c-gold); }
.site-footer__bottom {
  border-top: 1px solid var(--c-line-soft); padding-top: 1.5rem;
  color: var(--c-text-dim); font-size: .78rem;
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
}

/* ------------------------------------------------ パンくず */
.crumb { font-size: .76rem; letter-spacing: .1em; color: var(--c-text-dim);
         padding-top: 1.6rem; }
.crumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .5rem; margin: 0; padding: 0; }
.crumb li + li::before { content: "／"; margin-right: .5rem; color: var(--c-line); }
.crumb a { color: var(--c-text-dim); }

/* ページ見出し（下層）
   padding のショートハンドを使うと .wrap の padding-inline（左右の余白）を
   打ち消してしまい、スマホで本文が画面端に貼りつく。必ず padding-block で書く。 */
.page-head { padding-block: clamp(3rem, 7vw, 5.5rem) clamp(2rem, 4vw, 3rem); }
.page-head h1 { margin-bottom: 1.2rem; }

/* ------------------------------------------------ スクロール表示 */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .9s ease, transform .9s ease; }
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition: none !important; }
}