/* ============================================================
   FUGUFUKU — ふぐ福 Website
   Cloudflare Pages 版 — Design System + All Styles
   ============================================================ */

/* ── Custom Properties ──────────────────────────────────────── */
:root {
  /* Colors (OKLCH — perceptually uniform) */
  --bg:          oklch(98.5% 0.003 80);   /* warm off-white */
  --bg-subtle:   oklch(96%   0.005 80);   /* slightly deeper warm white */
  --bg-dark:     oklch(10%   0.006 80);   /* near-black footer */
  --text:        oklch(12%   0.007 80);   /* very dark warm */
  --text-mid:    oklch(44%   0.006 80);   /* medium gray */
  --text-light:  oklch(66%   0.004 80);   /* light gray */
  --gold:        oklch(62%   0.110 82);   /* warm gold accent */
  --gold-pale:   oklch(88%   0.040 82);   /* pale gold tint */
  --border:      oklch(91%   0.005 80);   /* hairline borders */
  --border-mid:  oklch(80%   0.007 80);   /* medium borders */

  /* Spacing (4pt base) */
  --sp-1:  0.25rem;   /* 4px  */
  --sp-2:  0.5rem;    /* 8px  */
  --sp-3:  0.75rem;   /* 12px */
  --sp-4:  1rem;      /* 16px */
  --sp-6:  1.5rem;    /* 24px */
  --sp-8:  2rem;      /* 32px */
  --sp-12: 3rem;      /* 48px */
  --sp-16: 4rem;      /* 64px */
  --sp-24: 6rem;      /* 96px */

  /* Typography */
  --font-ja: 'Shippori Mincho B1', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-en: 'Tenor Sans', 'Josefin Sans', sans-serif;

  /* Layout */
  --max-w:    1080px;
  --header-h: 64px;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ja);
  line-height: 1.85;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  opacity: 0;
  transition: opacity 0.35s ease;
}
body.loaded { opacity: 1; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { background: none; border: none; cursor: pointer; font-family: inherit; color: inherit; }
ul, ol { list-style: none; }

/* ── Container ──────────────────────────────────────────────── */
.container {
  width: min(var(--max-w), 100% - 2rem);
  margin-inline: auto;
}

/* ── Typography Tokens ──────────────────────────────────────── */
.en-label {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(0.6rem, 0.55rem + 0.2vw, 0.7rem);
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--text-light);
}
.section-title {
  font-size: clamp(1.4rem, 1rem + 2vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.5;
}

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: var(--bg);
  border-color: var(--border);
  box-shadow: 0 1px 12px oklch(0% 0 0 / 0.04);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.header-logo img {
  height: 38px;
  width: auto;
}

/* Desktop nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}
.site-nav a {
  font-size: clamp(0.75rem, 0.7rem + 0.2vw, 0.875rem);
  letter-spacing: 0.05em;
  transition: color 0.2s;
  position: relative;
  padding-bottom: 2px;
}
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0; right: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform 0.25s ease;
  transform-origin: left center;
}
.site-nav a:hover::after,
.site-nav a.active::after { transform: scaleX(1); }

.site-nav .nav-cta {
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid currentColor;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  transition: background 0.2s, color 0.2s;
}
.site-nav .nav-cta::after { display: none; }
.site-nav .nav-cta:hover { background: var(--text); color: var(--bg); }

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Mobile nav drawer */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--bg);
  z-index: 199;
  padding: var(--sp-8) var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: 0;
  pointer-events: none;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.25s, transform 0.25s;
}
.mobile-nav.open {
  pointer-events: auto;
  opacity: 1;
  transform: none;
}
.mobile-nav a {
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--border);
  display: block;
}

@media (max-width: 768px) {
  .site-nav { display: none; }
  .nav-toggle { display: flex; }
}

/* ── Hero (TOP) ─────────────────────────────────────────────── */
.hero {
  height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero-logo {
  width: min(400px, 80vw);
  height: auto;
  display: block;
}
.hero-scroll-hint {
  position: absolute;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
}
.hero-scroll-hint .en-label {
  letter-spacing: 0.4em;
  font-size: 0.6rem;
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: currentColor;
  color: var(--text-light);
  animation: scroll-pulse 1.8s ease infinite;
  transform-origin: top;
}
@keyframes scroll-pulse {
  0%   { transform: scaleY(1);   opacity: 0.6; }
  100% { transform: scaleY(0.1); opacity: 0;   }
}

/* ── Page Hero (inner pages) ────────────────────────────────── */
.page-hero {
  margin-top: var(--header-h);
  padding: var(--sp-16) 0 var(--sp-12);
  border-bottom: 1px solid var(--border);
}
.page-hero .en-label { margin-bottom: var(--sp-2); }
.page-hero h1 {
  font-size: clamp(1.5rem, 1rem + 2.5vw, 2.5rem);
  font-weight: 400;
  letter-spacing: 0.08em;
}

/* ── Section ────────────────────────────────────────────────── */
.section {
  padding: var(--sp-24) 0;
}
.section + .section {
  border-top: 1px solid var(--border);
}
.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--sp-4);
  margin-bottom: var(--sp-12);
}

/* ── Course Cards ────────────────────────────────────────────── */
.course-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
}
.course-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  align-items: start;
}
.course-card:nth-child(even) .course-img { order: 2; }

.course-img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
.course-body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding-top: var(--sp-4);
}
.course-badge {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  padding: 3px 10px;
  border: 1px solid var(--gold);
  color: var(--gold);
}
.course-name {
  font-size: clamp(1rem, 0.85rem + 0.75vw, 1.3rem);
  font-weight: 400;
  letter-spacing: 0.06em;
}
.course-price {
  font-size: 0.875rem;
  color: var(--text-mid);
  letter-spacing: 0.03em;
}
.course-price strong {
  font-size: 1.2em;
  color: var(--text);
  font-weight: 500;
}
.course-items {
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}
.course-items li {
  font-size: 0.875rem;
  color: var(--text-mid);
  letter-spacing: 0.03em;
  padding: 3px 0;
  padding-left: 1.2em;
  position: relative;
}
.course-items li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 0.75em;
}
.course-note {
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: var(--sp-3);
}

@media (max-width: 640px) {
  .course-card { grid-template-columns: 1fr; }
  .course-card:nth-child(even) .course-img { order: unset; }
}

/* ── Price List (単品) ──────────────────────────────────────── */
.menu-categories {
  display: flex;
  flex-direction: column;
  gap: var(--sp-12);
}
.menu-cat {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}
.menu-cat-header {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--border-mid);
}
.menu-cat-title {
  font-size: clamp(0.95rem, 0.85rem + 0.5vw, 1.1rem);
  font-weight: 400;
  letter-spacing: 0.08em;
}
.price-list {
  display: flex;
  flex-direction: column;
}
.price-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-6);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--border);
}
.price-row:last-child { border-bottom: none; }
.price-name {
  font-size: 0.875rem;
  letter-spacing: 0.03em;
  line-height: 1.6;
}
.price-name small {
  display: block;
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 2px;
}
.price-val {
  font-size: 0.875rem;
  color: var(--text-mid);
  white-space: nowrap;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

/* ── Accordion (Drinks) — THE FIX ──────────────────────────── */
/*
  grid-template-rows trick: expands in normal document flow,
  zero z-index conflicts, zero position absolute hacks.
  Content below is never obscured by an expanded accordion.
*/
.accordion-wrap {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.accordion-item {
  border-bottom: 1px solid var(--border);
}
.accordion-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-4) 0;
  text-align: left;
  font-size: clamp(0.9rem, 0.85rem + 0.2vw, 1rem);
  letter-spacing: 0.05em;
}
.acc-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  position: relative;
}
.acc-icon::before,
.acc-icon::after {
  content: '';
  position: absolute;
  background: var(--text-mid);
  transition: transform 0.3s ease, opacity 0.3s ease;
  border-radius: 1px;
}
.acc-icon::before { width: 18px; height: 1px; top: 50%; left: 0; transform: translateY(-50%); }
.acc-icon::after  { width: 1px; height: 18px; left: 50%; top: 0; transform: translateX(-50%); }
.accordion-trigger[aria-expanded="true"] .acc-icon::after {
  opacity: 0;
  transform: translateX(-50%) rotate(90deg);
}

/* The grid-row expansion — safe, clean, no overlap */
.acc-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.acc-body.open {
  grid-template-rows: 1fr;
}
.acc-inner {
  overflow: hidden;
  min-height: 0;
}
.acc-content {
  padding-bottom: var(--sp-6);
}

/* ── Reservation CTA (dark section) ────────────────────────── */
.res-section {
  background: var(--bg-dark);
  color: var(--bg);
  padding: var(--sp-24) 0;
  text-align: center;
}
.res-section .en-label { color: oklch(50% 0.004 80); }
.res-section h2 {
  font-size: clamp(1.3rem, 1rem + 1.5vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.1em;
  margin: var(--sp-3) 0 var(--sp-4);
  color: var(--bg);
}
.res-section p {
  font-size: 0.9rem;
  color: oklch(62% 0.004 80);
  max-width: 42ch;
  margin-inline: auto;
  margin-bottom: var(--sp-8);
  line-height: 2;
}
.res-links {
  display: flex;
  gap: var(--sp-4);
  justify-content: center;
  flex-wrap: wrap;
}
.btn-res {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-8);
  border: 1px solid oklch(30% 0.004 80);
  font-family: var(--font-ja);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--bg);
  transition: background 0.2s, border-color 0.2s;
}
.btn-res:hover { background: oklch(18% 0.006 80); border-color: oklch(50% 0.004 80); }
.btn-res svg { width: 20px; height: 20px; fill: currentColor; flex-shrink: 0; }

/* ── About / Chef section ────────────────────────────────────── */
.chef-section {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--sp-16);
  align-items: start;
}
.chef-img img {
  width: 100%;
  max-height: 480px;
  object-fit: contain;
  background: oklch(96% 0.005 80);
}
.chef-text { display: flex; flex-direction: column; gap: var(--sp-6); }
.chef-quote {
  font-size: clamp(1rem, 0.875rem + 0.5vw, 1.2rem);
  letter-spacing: 0.08em;
  line-height: 2;
}
.chef-quote::before { content: '「'; color: var(--gold); }
.chef-quote::after  { content: '」'; color: var(--gold); }
.chef-body {
  font-size: 0.875rem;
  line-height: 2.1;
  color: var(--text-mid);
}
@media (max-width: 640px) { .chef-section { grid-template-columns: 1fr; } }

/* ── Philosophy (こだわり) ──────────────────────────────────── */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-12) var(--sp-8);
}
.phil-item { display: flex; flex-direction: column; gap: var(--sp-3); }
.phil-num {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: var(--sp-2);
  display: block;
}
.phil-title {
  font-size: clamp(0.95rem, 0.85rem + 0.4vw, 1.1rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border-mid);
}
.phil-body {
  font-size: 0.875rem;
  line-height: 2;
  color: var(--text-mid);
}
@media (max-width: 768px) {
  .philosophy-grid { grid-template-columns: 1fr; gap: var(--sp-8); }
}

/* ── Access ─────────────────────────────────────────────────── */
.access-layout {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--sp-12);
  align-items: start;
}
.access-map {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-subtle);
}
.access-map iframe { width: 100%; height: 100%; border: none; display: block; }
.access-info { display: flex; flex-direction: column; gap: 0; }
.access-row {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  padding: var(--sp-6) 0;
  border-bottom: 1px solid var(--border);
}
.access-row:last-child { border-bottom: none; }
.access-lbl {
  font-family: var(--font-en);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
}
.access-val {
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  line-height: 1.85;
}
.access-val a { border-bottom: 1px solid var(--border-mid); transition: border-color 0.2s; }
.access-val a:hover { border-color: var(--text); }
@media (max-width: 768px) { .access-layout { grid-template-columns: 1fr; } }

/* ── Contact Form ────────────────────────────────────────────── */
.contact-form {
  max-width: 620px;
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}
.form-group { display: flex; flex-direction: column; gap: var(--sp-2); }
.form-lbl {
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.req {
  font-family: var(--font-en);
  font-size: 0.58rem;
  letter-spacing: 0.15em;
  padding: 2px 6px;
  background: var(--text);
  color: var(--bg);
}
.form-ctrl {
  padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border-mid);
  background: var(--bg);
  font-family: var(--font-ja);
  font-size: 0.9rem;
  color: var(--text);
  width: 100%;
  border-radius: 0;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color 0.2s;
}
.form-ctrl:focus { outline: none; border-color: var(--text); }
textarea.form-ctrl { min-height: 160px; resize: vertical; line-height: 1.7; }
.sel-wrap { position: relative; }
.sel-wrap::after {
  content: '';
  position: absolute;
  right: 16px; top: 50%;
  width: 7px; height: 7px;
  border-right: 1px solid var(--text-mid);
  border-bottom: 1px solid var(--text-mid);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}
.form-submit {
  align-self: flex-start;
  padding: var(--sp-4) var(--sp-12);
  background: var(--text);
  color: var(--bg);
  font-family: var(--font-ja);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  border: 1px solid var(--text);
  transition: background 0.2s, color 0.2s;
}
.form-submit:hover { background: var(--bg); color: var(--text); }

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--bg-dark);
  color: var(--bg);
  padding: var(--sp-24) 0 var(--sp-12);
}
.footer-grid {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--sp-16);
  align-items: start;
  padding-bottom: var(--sp-12);
  border-bottom: 1px solid oklch(20% 0.004 80);
}
.footer-logo img { height: 80px; width: auto; }
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding-top: var(--sp-2);
}
.footer-nav a {
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: oklch(55% 0.004 80);
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--bg); }
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  text-align: right;
}
.footer-contact p {
  font-size: 0.8rem;
  color: oklch(50% 0.004 80);
  line-height: 1.8;
  letter-spacing: 0.03em;
}
.footer-contact a { color: inherit; border-bottom: 1px solid oklch(28% 0.004 80); transition: border-color 0.2s; }
.footer-contact a:hover { border-color: oklch(55% 0.004 80); }
.footer-social {
  display: flex;
  gap: var(--sp-4);
  justify-content: flex-end;
}
.footer-social a {
  font-family: var(--font-en);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: oklch(50% 0.004 80);
  border: none;
  transition: color 0.2s;
}
.footer-social a:hover { color: var(--bg); }
.footer-copy {
  margin-top: var(--sp-8);
  text-align: center;
  font-family: var(--font-en);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: oklch(32% 0.004 80);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-8); }
  .footer-contact { text-align: left; }
  .footer-social { justify-content: flex-start; }
}

/* ── Utility ─────────────────────────────────────────────────── */
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  border: 1px solid var(--text);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  transition: background 0.2s, color 0.2s;
}
.btn-outline:hover { background: var(--text); color: var(--bg); }
.text-gold { color: var(--gold); }
.mt-auto { margin-top: auto; }

/* ── Index page extras ───────────────────────────────────────── */
.index-about {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}
.index-about-text { display: flex; flex-direction: column; gap: var(--sp-6); }
.index-about-text p {
  font-size: 0.9rem;
  line-height: 2.1;
  color: var(--text-mid);
  max-width: 48ch;
}
.index-about-img img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: contain;
  background: oklch(96% 0.005 80);
}
@media (max-width: 640px) { .index-about { grid-template-columns: 1fr; } }

.course-teaser {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
  margin-bottom: var(--sp-10);
}
.course-teaser-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}
.course-teaser-info {
  padding: var(--sp-4) 0 var(--sp-2);
}
.course-teaser-info .en-label { margin-bottom: var(--sp-1); }
.course-teaser-info .name {
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  margin-top: 4px;
}
.course-teaser-info .price {
  font-size: 0.8rem;
  color: var(--text-mid);
  margin-top: 4px;
}
@media (max-width: 600px) {
  .course-teaser { grid-template-columns: 1fr; }
}

/* ── Reservation page ────────────────────────────────────────── */
.res-page-body {
  max-width: 580px;
  margin-inline: auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-8);
}
.res-page-body p {
  font-size: 0.9rem;
  line-height: 2.1;
  color: var(--text-mid);
  max-width: 44ch;
}
.res-tel {
  font-size: clamp(1.1rem, 0.9rem + 1vw, 1.5rem);
  letter-spacing: 0.08em;
}
.res-tel a { border-bottom: 1px solid var(--border-mid); transition: border-color 0.2s; }
.res-tel a:hover { border-color: var(--text); }