/* =========================================================
   川国志 神保町店 紹介サイト（試作）
   ========================================================= */

:root {
  --red: #b23b2e;
  --red-dark: #8a2a20;
  --ink: #2b2320;
  --paper: #fbf6f1;
  --paper-2: #f2e6df;
  --line: #e2d3c8;
  --muted: #8b7a70;
  --max: 1040px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic",
    "Meiryo", system-ui, sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--red-dark); }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(251, 246, 241, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--red);
  color: #fff;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 22px;
}

.brand-name {
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-sub {
  margin-left: 8px;
  font-size: 13px;
  color: var(--muted);
}

.nav {
  display: flex;
  gap: 22px;
  font-size: 14px;
}

.nav a {
  text-decoration: none;
  color: var(--ink);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover { border-color: var(--red); }

/* ---------- ヒーロー ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 64px 24px 72px;
}

.hero-media img {
  width: 100%;
  border-radius: 14px;
  box-shadow: 0 18px 40px rgba(138, 42, 32, 0.18);
}

.hero-kicker {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--red);
}

.hero-title {
  margin: 0 0 14px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.3;
  letter-spacing: 0.04em;
}

.hero-title span { color: var(--red); }

.hero-sub {
  margin: 0 0 20px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(17px, 2.4vw, 21px);
  color: var(--red-dark);
  letter-spacing: 0.04em;
}

.hero-lead {
  margin: 0 0 28px;
  color: #4b3f39;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- ボタン ---------- */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--red);
  color: var(--red-dark);
  text-decoration: none;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}

.btn:hover { background: var(--paper-2); }

.btn-primary {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}

.btn-primary:hover { background: var(--red-dark); color: #fff; }

/* ---------- セクション共通 ---------- */
.section { padding: 64px 0; border-top: 1px solid var(--line); }

.section-kicker {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--red);
}

.section-title {
  margin: 0 0 24px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(24px, 4vw, 34px);
}

.section-note {
  margin: -12px 0 28px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 麻婆豆腐 ---------- */
.section-mapo { background: var(--paper-2); }

.mapo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.mapo-photo { margin: 0; }

.mapo-photo img { border-radius: 12px; }

.mapo-photo figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

.spice-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 8px;
}

.spice-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
}

.spice-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex: none;
}

.spice-dot.s1 { background: #e8a13c; }
.spice-dot.s2 { background: #d1602c; }
.spice-dot.s3 { background: #a52218; }

.note { font-size: 13px; color: var(--muted); }

/* ---------- お品書き ---------- */
.menu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.dish {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.dish img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.dish h3 {
  margin: 14px 16px 6px;
  font-size: 17px;
}

.dish p {
  margin: 0 16px 16px;
  font-size: 13px;
  color: #5c4f47;
}

/* ---------- コースメニュー ---------- */
.course-intro { border-top: none; padding-bottom: 32px; }

.course-section { padding: 32px 0; }

.section-alt { background: var(--paper-2); }

.course-card {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
  align-items: center;
}

.course-card-reverse .course-media { order: 2; }
.course-card-reverse .course-body { order: 1; }

.course-media { margin: 0; }

.course-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 12px 28px rgba(138, 42, 32, 0.14);
}

.course-name {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin: 0 0 18px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(24px, 4vw, 30px);
}

.course-price {
  font-family: inherit;
  font-size: 18px;
  color: var(--red-dark);
}

.course-price small {
  margin-left: 4px;
  font-size: 12px;
  color: var(--muted);
}

.course-dishes {
  list-style: none;
  margin: 0;
  padding: 0;
}

.course-dishes li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
}

.course-dishes li::before {
  content: "・";
  color: var(--red);
}

.course-terms {
  margin: 0 0 8px;
  padding-left: 1.4em;
  color: #4b3f39;
}

.course-terms li { margin-bottom: 4px; }

/* ---------- 店舗情報 ---------- */
.section-info { background: var(--paper-2); }

.info-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.info-list > div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line);
}

.info-list dt {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.info-list dd { margin: 0; }

.map-link { margin-top: 24px; }

/* ---------- フッター ---------- */
.site-footer {
  background: var(--ink);
  color: #f2e6df;
  padding: 32px 0;
  text-align: center;
}

.site-footer p { margin: 4px 0; }

.site-footer .small { font-size: 12px; color: #b8a89e; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding-top: 40px; }
  .mapo-grid { grid-template-columns: 1fr; gap: 24px; }
  .menu-grid { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; }
  .course-card,
  .course-card-reverse { grid-template-columns: 1fr; gap: 20px; }
  .course-card-reverse .course-media,
  .course-card-reverse .course-body { order: initial; }
}

@media (max-width: 520px) {
  .menu-grid { grid-template-columns: 1fr; }
  .info-list > div { grid-template-columns: 1fr; gap: 2px; }
}

/* コース一覧：既存の色・書体に合わせたカード */
.course-menu-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.course-menu-card { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 28px; scroll-margin-top: 88px; }
.course-menu-card .course-name { font-size: clamp(22px, 3vw, 28px); margin-bottom: 8px; }
.course-menu-card .course-price { margin: 0; font-size: 24px; }
.course-meta { color: var(--muted); font-size: 14px; margin: 4px 0 20px; }
.course-ordered { list-style: decimal; padding-left: 1.5em; }
.course-ordered li::before { content: none; }
@media (max-width: 820px) { .course-menu-grid { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .course-menu-card { padding: 20px; } }

.hotpot-details { margin-top: 4px; color: var(--ink); font-size: inherit; line-height: 1.8; }

.store-map { margin-top: 24px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fff; }
.store-map iframe { display: block; width: 100%; }
@media (max-width: 520px) { .store-map iframe { height: 300px; } }

.nav .nav-course { text-align: center; line-height: 1.5; }
.nav-course span { font-size: 11px; }
.course-plan-subtitle { font-size: 0.65em; }

.hero-title .hero-title-category { font-size: 0.75em; color: var(--ink); white-space: nowrap; }
.hero-title-name { color: var(--red); white-space: nowrap; ruby-position: over; }
.hero-title-name rt { font-family: 'Yu Gothic', 'Meiryo', sans-serif; font-size: 0.28em; font-weight: normal; letter-spacing: 0.08em; color: var(--red-dark); }
.hero-title .hero-title-branch { font-size: 0.75em; color: var(--red); white-space: nowrap; }
.store-map iframe { border: 0; }