:root {
  --ink: #2b211a;            /* 焦げ茶の文字色 */
  --wood: #3e2f23;           /* 濃い木目 */
  --wood-light: #5a4634;
  --cream: #f3ead8;          /* クリームソーダの生クリーム色 */
  --paper: #ede1c8;          /* 古い紙 */
  --green: #274435;          /* ビロードの深緑 */
  --gold: #b8894a;           /* 真鍮 */
  --red: #8d3b2f;            /* 臙脂 */
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 70px; }
body {
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  color: var(--ink);
  background: var(--paper);
  /* 古い紙のような細かい模様 */
  background-image: radial-gradient(rgba(62, 47, 35, 0.05) 1px, transparent 1px);
  background-size: 5px 5px;
  line-height: 2;
}
img { max-width: 100%; display: block; }

.serif-display { font-family: "Zen Old Mincho", "Shippori Mincho", serif; }

/* ヘッダー */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--wood);
  color: var(--cream);
  border-bottom: 3px double var(--gold);
}
.header-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.logo {
  font-family: "Zen Old Mincho", serif;
  font-weight: 900;
  font-size: 1.35rem;
  color: var(--cream);
  text-decoration: none;
  letter-spacing: 3px;
}
.logo small {
  display: block;
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 5px;
  color: var(--gold);
}
nav ul { display: flex; gap: 20px; list-style: none; flex-wrap: wrap; }
nav a {
  text-decoration: none;
  color: var(--cream);
  font-size: 0.9rem;
  letter-spacing: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
nav a:hover { color: var(--gold); border-color: var(--gold); }

/* ハンバーガーボタン（スマホのみ表示） */
.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 12px 10px;
  background: transparent;
  border: 1px solid var(--gold);
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--cream);
  transition: transform 0.25s, opacity 0.25s;
}
/* 開いたら三本線を✕に */
.nav-toggle.open span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }

/* ヒーロー */
.hero {
  position: relative;
  min-height: 78vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--cream);
  background:
    linear-gradient(rgba(35, 24, 16, 0.62), rgba(35, 24, 16, 0.72)),
    url("images/hero.jpg") center / cover no-repeat;
}
.hero-inner {
  padding: 80px 24px;
  max-width: 720px;
}
.hero-frame {
  border: 1px solid rgba(243, 234, 216, 0.6);
  outline: 4px double rgba(184, 137, 74, 0.8);
  outline-offset: 6px;
  padding: 48px 36px;
  background: rgba(35, 24, 16, 0.35);
}
.hero .est {
  font-size: 0.75rem;
  letter-spacing: 6px;
  color: var(--gold);
  margin-bottom: 18px;
}
.hero h1 {
  font-family: "Zen Old Mincho", serif;
  font-weight: 900;
  font-size: clamp(2rem, 6vw, 3.6rem);
  letter-spacing: 8px;
  margin-bottom: 18px;
}
.hero p {
  font-size: 1rem;
  letter-spacing: 2px;
  margin-bottom: 30px;
}
.btn {
  display: inline-block;
  background: transparent;
  color: var(--cream);
  border: 1px solid var(--gold);
  padding: 12px 44px;
  text-decoration: none;
  letter-spacing: 4px;
  font-size: 0.95rem;
  transition: background 0.25s, color 0.25s;
}
.btn:hover { background: var(--gold); color: var(--wood); }

/* セクション共通 */
section { padding: 80px 20px; }
.container { max-width: 1040px; margin: 0 auto; }
.section-title {
  text-align: center;
  font-family: "Zen Old Mincho", serif;
  font-weight: 700;
  font-size: 1.7rem;
  letter-spacing: 6px;
  margin-bottom: 8px;
}
.section-sub {
  text-align: center;
  font-size: 0.72rem;
  letter-spacing: 5px;
  color: var(--gold);
  margin-bottom: 24px;
  text-transform: uppercase;
}
.ornament {
  text-align: center;
  color: var(--gold);
  margin-bottom: 40px;
  font-size: 0.9rem;
  letter-spacing: 6px;
}
.ornament::before, .ornament::after {
  content: "────";
  color: rgba(184, 137, 74, 0.5);
  margin: 0 12px;
}

/* 当店について */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
}
.about-grid .photo {
  border: 1px solid var(--gold);
  padding: 10px;
  background: var(--cream);
  box-shadow: 6px 6px 0 rgba(62, 47, 35, 0.25);
}
.about-grid .photo img { filter: sepia(0.28) saturate(0.9) contrast(0.98); }
.about-text p { margin-bottom: 1.2em; }
.about-text .lead {
  font-family: "Zen Old Mincho", serif;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--red);
}

/* 猫スタッフ */
.cats { background: var(--green); color: var(--cream); }
.cats .section-title { color: var(--cream); }
.cats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 28px;
}
.cat-card {
  background: var(--cream);
  color: var(--ink);
  padding: 12px 12px 20px;
  border: 1px solid var(--gold);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.3);
  transition: transform 0.2s;
}
.cat-card:hover { transform: translateY(-5px); }
.cat-card .photo {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border: 1px solid var(--wood-light);
  margin-bottom: 14px;
}
.cat-card .photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: sepia(0.22) saturate(0.92);
  transition: transform 0.3s;
}
.cat-card:hover .photo img { transform: scale(1.05); }
.cat-card h3 {
  font-family: "Zen Old Mincho", serif;
  text-align: center;
  letter-spacing: 4px;
  margin-bottom: 4px;
}
.cat-card .breed {
  text-align: center;
  font-size: 0.78rem;
  color: var(--red);
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.cat-card p { font-size: 0.85rem; line-height: 1.8; padding: 0 6px; }

/* お品書き（料金） */
.menu-section {
  background:
    linear-gradient(rgba(43, 33, 26, 0.88), rgba(43, 33, 26, 0.9)),
    url("images/coffee.jpg") center / cover no-repeat;
  color: var(--cream);
}
.menu-section .section-title { color: var(--cream); }
.menu-board {
  max-width: 640px;
  margin: 0 auto;
  border: 1px solid var(--gold);
  outline: 3px double rgba(184, 137, 74, 0.6);
  outline-offset: 5px;
  padding: 40px 34px;
  background: rgba(35, 24, 16, 0.55);
}
.menu-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 20px;
}
.menu-item .name { letter-spacing: 2px; white-space: nowrap; }
.menu-item .name small {
  display: block;
  font-size: 0.72rem;
  color: rgba(243, 234, 216, 0.7);
  letter-spacing: 1px;
}
.menu-item .dots {
  flex: 1;
  border-bottom: 1px dotted rgba(184, 137, 74, 0.7);
  transform: translateY(-6px);
}
.menu-item .price {
  font-family: "Zen Old Mincho", serif;
  font-weight: 700;
  color: var(--gold);
  white-space: nowrap;
}
.menu-note {
  max-width: 640px;
  margin: 18px auto 0;
  font-size: 0.78rem;
  color: rgba(243, 234, 216, 0.75);
  text-align: center;
  letter-spacing: 1px;
}

/* 店舗情報 */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}
.info-card {
  background: var(--cream);
  border: 1px solid var(--gold);
  padding: 32px 30px;
  box-shadow: 5px 5px 0 rgba(62, 47, 35, 0.2);
}
.info-card h3 {
  font-family: "Zen Old Mincho", serif;
  letter-spacing: 4px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 3px double var(--gold);
  color: var(--red);
}
.info-card dl { display: grid; grid-template-columns: 6em 1fr; row-gap: 10px; }
.info-card dt { color: var(--wood-light); font-weight: 700; }
.tel-link {
  color: var(--ink);
  text-decoration-color: var(--gold);
  text-underline-offset: 4px;
}

/* ご利用のしおり */
.rules-section { background: var(--wood); color: var(--cream); }
.rules-section .section-title { color: var(--cream); }
.rules-list {
  max-width: 620px;
  margin: 0 auto;
  list-style: none;
  counter-reset: rule;
}
.rules-list li {
  counter-increment: rule;
  padding: 16px 8px 16px 0;
  border-bottom: 1px dotted rgba(184, 137, 74, 0.5);
  letter-spacing: 1px;
  display: flex;
  gap: 16px;
  align-items: baseline;
}
.rules-list li::before {
  content: "其の" counter(rule, cjk-ideographic);
  font-family: "Zen Old Mincho", serif;
  color: var(--gold);
  white-space: nowrap;
}

/* フッター */
footer {
  background: #201810;
  color: rgba(243, 234, 216, 0.8);
  text-align: center;
  padding: 40px 20px 30px;
  font-size: 0.8rem;
  letter-spacing: 2px;
}
footer .logo-foot {
  font-family: "Zen Old Mincho", serif;
  font-size: 1.1rem;
  color: var(--cream);
  letter-spacing: 5px;
  margin-bottom: 10px;
}
footer .credit { margin-top: 14px; font-size: 0.7rem; color: rgba(243, 234, 216, 0.45); }

@media (max-width: 720px) {
  /* ハンバーガーメニュー */
  .nav-toggle { display: flex; }
  header nav {
    /* ヘッダー下の全幅ドロップダウン */
    order: 3;
    flex-basis: 100%;
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
  }
  header nav.open { max-height: 400px; }
  nav ul {
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--gold);
    padding: 6px 0 10px;
  }
  nav a {
    display: block;
    padding: 14px 8px;
    font-size: 1rem;
    border-bottom: 1px dotted rgba(184, 137, 74, 0.5);
  }
  nav li:last-child a { border-bottom: none; }

  /* 本文の文字サイズを16px以上に */
  .cat-card p { font-size: 1rem; }
  .breed { font-size: 0.85rem; }
  .menu-note { font-size: 0.85rem; }
  footer { font-size: 0.85rem; }

  /* レイアウト調整 */
  .about-grid { grid-template-columns: 1fr; }
  section { padding: 60px 16px; }
  .hero-frame { padding: 36px 20px; }
  .hero h1 { font-size: clamp(1.6rem, 7.5vw, 2.5rem); letter-spacing: 4px; }
  .hero p { letter-spacing: 1px; }
  .menu-board { padding: 28px 18px; }
  .menu-item { flex-wrap: wrap; row-gap: 2px; }
  .info-card dl { grid-template-columns: 1fr; row-gap: 4px; }
  .info-card dd { margin-bottom: 10px; }
  .tel-link { display: inline-block; padding: 8px 0; }
}