/* ============================================================
   Dream Asia 株式会社 — shared design system
   Concept: 夜の蒲田、灯りとごちそう (Kamata at night: lanterns & feasts)
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  color-scheme: light;

  /* color */
  --sumi: #201b15;
  --sumi: oklch(0.24 0.015 75);
  --sumi-2: #2b241b;
  --sumi-2: oklch(0.28 0.02 75);
  --paper: #faf6ef;
  --paper: oklch(0.975 0.012 85);
  --paper-2: #f2ebdf;
  --paper-2: oklch(0.94 0.02 85);
  --ember: #e88b2d;
  --ember: oklch(0.72 0.145 62);
  --ember-deep: #a85400; /* AA: 4.96:1 on paper, 4.51:1 on paper-2, 5.34:1 under white */
  --ember-deep: oklch(0.53 0.13 58);
  --matcha: #276843; /* AA: 6.19:1 on paper, 5.63:1 on paper-2 */
  --matcha: oklch(0.46 0.09 155);
  --ink: #2a241c;
  --ink: oklch(0.26 0.015 75);
  --ink-mute: #6e655a;
  --ink-mute: oklch(0.5 0.02 75);
  --cream: #f6efe4;
  --cream: oklch(0.955 0.015 85);
  --cream-mute: #c2b6a3;
  --cream-mute: oklch(0.78 0.025 80);
  --line: #e4dbcb;
  --line: oklch(0.89 0.02 85);
  --line-dark: #3d352a;
  --line-dark: oklch(0.34 0.02 75);

  /* brand chips */
  --brand-raclette: #d9a441;
  --brand-freestyle: #e88b2d;
  --brand-coco: #a6453f;
  --brand-wajiya: #2f7d4f;

  /* type */
  --font-display: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-body: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --fs-hero: clamp(2rem, 1.2rem + 4vw, 4rem);
  --fs-h2: clamp(1.6rem, 1.1rem + 2.2vw, 2.6rem);
  --fs-h3: clamp(1.2rem, 1rem + 1vw, 1.6rem);
  --fs-body: clamp(0.95rem, 0.9rem + 0.25vw, 1.0625rem);
  --fs-small: 0.85rem;
  --fs-eyebrow: clamp(0.7rem, 0.65rem + 0.2vw, 0.8rem);

  /* rhythm */
  --space-section: clamp(4rem, 2.5rem + 6vw, 8rem);
  --space-gap: clamp(1.25rem, 1rem + 1.5vw, 2.5rem);
  --container: 72rem;
  --container-narrow: 46rem;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 40px -12px rgb(32 27 21 / 0.18);
  --ring: 0 0 0 3px color-mix(in oklab, var(--ember) 45%, transparent);
}

/* ---------- View transitions (progressive enhancement) ---------- */
@view-transition {
  navigation: auto;
}
@media (prefers-reduced-motion: reduce) {
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.9; /* generous — Japanese body text */
  font-feature-settings: "palt"; /* proportional kana/kanji spacing */
  overflow-wrap: anywhere;
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.02em;
  text-wrap: balance;
  margin: 0 0 0.6em;
}
p {
  margin: 0 0 1em;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--ember-deep);
  text-underline-offset: 0.2em;
}
a:hover {
  color: var(--ember-deep);
  text-decoration-thickness: 2px;
}
:focus-visible {
  outline: 2px solid transparent; /* surfaces in forced-colors mode */
  outline-offset: 2px;
  box-shadow: var(--ring);
  border-radius: 4px;
}
::selection {
  background: color-mix(in oklab, var(--ember) 30%, transparent);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
  background: var(--sumi);
  color: var(--cream);
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}
.container--narrow {
  width: min(100% - 2.5rem, var(--container-narrow));
  margin-inline: auto;
}

/* ---------- Typography helpers ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75em;
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--matcha);
}
.eyebrow::before {
  content: "";
  width: 2em;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}
.on-dark .eyebrow,
.eyebrow--ember {
  color: var(--ember);
}
.display {
  font-family: var(--font-display);
}
.tategaki {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.22em;
  font-family: var(--font-display);
  white-space: nowrap; /* never wrap into a second vertical column */
}
.lead {
  font-size: calc(var(--fs-body) * 1.12);
  line-height: 2.1;
}
.muted {
  color: var(--ink-mute);
}

/* ---------- Sections ---------- */
.section {
  padding-block: var(--space-section);
  position: relative;
}
.section--paper2 {
  background: var(--paper-2);
}
.section--dark {
  background: var(--sumi);
  color: var(--cream);
}
.section--dark :is(h1, h2, h3) {
  color: var(--cream);
}
.section--dark .muted {
  color: var(--cream-mute);
}
.section__head {
  margin-bottom: calc(var(--space-gap) * 1.4);
}
.section__head h2 {
  font-size: var(--fs-h2);
  margin: 0.35em 0 0;
}
.section__head .lead {
  max-width: 46rem;
}

/* lantern glow for dark bands */
.glow {
  position: relative;
  isolation: isolate;
}
.glow::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(38rem 24rem at 82% -10%, rgb(232 139 45 / 0.16), transparent 65%),
    radial-gradient(28rem 20rem at 8% 110%, rgb(232 139 45 / 0.1), transparent 60%);
  pointer-events: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: 0.85em 1.9em;
  border-radius: 999px;
  border: 1.5px solid transparent;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap; /* labels and phone numbers never break */
  transition: background-color 0.25s, color 0.25s, border-color 0.25s, transform 0.15s;
}
.btn:active {
  transform: translateY(1px);
}
.btn--primary {
  background: var(--ember);
  border-color: var(--ember);
  color: var(--sumi); /* AA 6.64:1 — white on ember fails at 2.57:1 */
}
.btn--primary:hover {
  background: color-mix(in oklab, var(--ember) 80%, white);
  border-color: color-mix(in oklab, var(--ember) 80%, white);
  color: var(--sumi);
}
.btn--ghost {
  background: transparent;
  border-color: currentColor;
  color: var(--ink);
}
.on-dark .btn--ghost,
.section--dark .btn--ghost {
  color: var(--cream);
}
.btn--ghost:hover {
  background: color-mix(in oklab, currentColor 12%, transparent);
}
.btn--tel {
  background: var(--sumi);
  border-color: var(--sumi);
  color: var(--cream);
  font-feature-settings: "tnum";
}
.btn--tel:hover {
  background: var(--sumi-2);
  color: #fff;
}
.section--dark .btn--tel {
  background: var(--ember);
  border-color: var(--ember);
  color: var(--sumi); /* cream on ember would fail contrast */
}
.section--dark .btn--tel:hover {
  background: color-mix(in oklab, var(--ember) 80%, white);
  color: var(--sumi);
}
.btn svg {
  width: 1.1em;
  height: 1.1em;
  flex: none;
}

/* ---------- Chips ---------- */
.chip {
  display: inline-block;
  padding: 0.3em 0.95em;
  border-radius: 999px;
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--sumi); /* dark text: light chip colors fail AA under white */
  background: var(--ember);
}
.chip[data-brand="raclette"] { background: var(--brand-raclette); }
.chip[data-brand="freestyle"] { background: var(--brand-freestyle); }
.chip[data-brand="coco"] { background: var(--brand-coco); color: #fff; }
.chip[data-brand="wajiya"] { background: var(--brand-wajiya); color: #fff; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid color-mix(in oklab, var(--line) 70%, transparent);
  transition: background-color 0.3s, border-color 0.3s;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}
.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}
.site-header__logo img {
  height: 2.1rem;
  width: auto;
}
.site-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(0.25rem, 1vw, 1rem);
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  display: block;
  padding: 0.5rem 0.75rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
}
.site-nav a .en {
  display: block;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  text-align: center;
}
.site-nav a:hover {
  color: var(--ember-deep);
  background: color-mix(in oklab, var(--ember) 10%, transparent);
}
.site-nav a[aria-current="page"] {
  color: var(--ember-deep);
}
.site-nav a[aria-current="page"] .en {
  color: var(--ember-deep);
}
.site-nav .btn {
  padding: 0.55em 1.4em;
  font-size: 0.92rem;
}
/* the nav CTA keeps dark-on-ember in every header state (contrast) */
.site-nav a.btn--primary,
.page--dark-hero .site-header:not(.is-scrolled) .site-nav a.btn--primary,
.page--dark-hero .site-header.is-scrolled .site-nav a.btn--primary {
  color: var(--sumi);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 0.6rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.nav-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
  transition: transform 0.25s, opacity 0.25s;
}

/* dark-hero pages: header sits over the hero */
.page--dark-hero .site-header {
  position: fixed;
  inset-inline: 0;
  background: transparent;
  border-bottom-color: transparent;
}
.page--dark-hero .site-header:not(.is-scrolled) .site-nav a { color: var(--cream); }
.page--dark-hero .site-header:not(.is-scrolled) .site-nav a .en { color: var(--cream-mute); }
.page--dark-hero .site-header:not(.is-scrolled) .nav-toggle .bar { background: var(--cream); }
.page--dark-hero .site-header.is-scrolled {
  background: color-mix(in oklab, var(--sumi) 88%, transparent);
  border-bottom-color: var(--line-dark);
}
.page--dark-hero .site-header.is-scrolled .site-nav a { color: var(--cream); }
.page--dark-hero .site-header.is-scrolled .site-nav a .en { color: var(--cream-mute); }
.page--dark-hero .site-header.is-scrolled .nav-toggle .bar { background: var(--cream); }

@media (max-width: 860px) {
  .nav-toggle {
    display: block;
  }
  /* backdrop-filter makes the header a containing block, which would trap
     the fixed fullscreen nav inside it — lift it while the nav is open */
  .site-header:has(.site-nav.is-open) {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .site-nav {
    position: fixed;
    inset: 0;
    background: rgb(32 27 21 / 0.97);
    display: grid;
    place-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
  }
  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
  }
  .site-nav ul {
    flex-direction: column;
    gap: 1.4rem;
    text-align: center;
  }
  .site-nav a {
    color: var(--cream) !important;
    font-size: 1.3rem;
    font-family: var(--font-display);
  }
  .site-nav a.btn--primary {
    color: var(--sumi) !important; /* dark-on-ember for contrast */
  }
  .site-nav a .en {
    color: var(--cream-mute) !important;
  }
  .nav-toggle.is-open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.is-open .bar:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-toggle.is-open {
    position: relative;
    z-index: 60;
  }
  .nav-toggle.is-open .bar {
    background: var(--cream);
  }
}

/* ---------- Page hero (subpages) ---------- */
.page-hero {
  position: relative;
  padding-block: calc(var(--space-section) * 0.9) calc(var(--space-section) * 0.55);
  background:
    radial-gradient(30rem 18rem at 90% 0%, color-mix(in oklab, var(--ember) 14%, transparent), transparent 65%),
    var(--paper-2);
  overflow: clip;
}
.page-hero h1 {
  font-size: var(--fs-hero);
  margin: 0.3em 0 0.2em;
}
.page-hero .lead {
  max-width: 44rem;
  color: var(--ink-mute);
  margin-bottom: 0;
}
.page-hero .tategaki--rail {
  position: absolute;
  top: 50%;
  right: clamp(0.5rem, 3vw, 3rem);
  translate: 0 -50%;
  font-size: clamp(0.9rem, 0.8rem + 0.5vw, 1.25rem);
  color: color-mix(in oklab, var(--ink) 26%, transparent);
  user-select: none;
  pointer-events: none;
}
@media (max-width: 700px) {
  .page-hero .tategaki--rail {
    display: none;
  }
}

/* ---------- Cards ---------- */
.brand-grid {
  container-type: inline-size;
}
.brand-grid__inner {
  display: grid;
  gap: var(--space-gap);
  grid-template-columns: repeat(4, 1fr);
}
@container (max-width: 68rem) {
  .brand-grid__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}
@container (max-width: 34rem) {
  .brand-grid__inner {
    grid-template-columns: 1fr;
  }
}
.brand-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}
.brand-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 18px 50px -14px rgb(32 27 21 / 0.28);
}
.brand-card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.brand-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.brand-card:hover .brand-card__media img {
  transform: scale(1.045);
}
.brand-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.4rem 1.4rem 1.6rem;
  flex: 1;
}
.brand-card__body h3 {
  font-size: var(--fs-h3);
  margin: 0;
}
.brand-card__body .genre {
  font-size: var(--fs-small);
  color: var(--ink-mute);
}
.brand-card__foot {
  margin-top: auto;
  padding-top: 0.8rem;
}

/* ---------- Profile table ---------- */
.profile-table {
  margin: 0;
  border-top: 1px solid var(--line);
}
.profile-table > div {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  padding: 1.1rem 0.25rem;
  border-bottom: 1px solid var(--line);
}
.profile-table dt {
  font-weight: 700;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
}
.profile-table dd {
  margin: 0;
}
@media (max-width: 560px) {
  .profile-table > div {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}

/* ---------- Timeline ---------- */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 2px;
  background: linear-gradient(var(--ember), var(--matcha));
  border-radius: 2px;
}
.timeline li {
  position: relative;
  padding: 0 0 2rem 2.4rem;
}
.timeline li:last-child {
  padding-bottom: 0;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--ember);
}
.timeline .year {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ember-deep);
  letter-spacing: 0.06em;
  display: block;
}

/* ---------- Forms ---------- */
.form-field {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1.5rem;
}
.form-field label {
  font-weight: 700;
  letter-spacing: 0.05em;
}
.form-field .req {
  display: inline-block;
  margin-left: 0.5em;
  padding: 0.1em 0.6em;
  border-radius: 4px;
  background: var(--ember);
  color: var(--sumi);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  vertical-align: 0.15em;
}
.form-field :is(input, textarea) {
  font: inherit;
  color: inherit;
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.8em 1em;
  transition: border-color 0.2s;
}
.form-field :is(input, textarea):hover {
  border-color: color-mix(in oklab, var(--ink-mute) 50%, var(--line));
}
.form-field :is(input, textarea):focus-visible {
  border-color: var(--ember);
  box-shadow: var(--ring);
}
.form-field :is(input, textarea):user-invalid {
  border-color: #c0392b;
}
.form-field .hint {
  font-size: var(--fs-small);
  color: var(--ink-mute);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--sumi);
  color: var(--cream);
  padding-block: calc(var(--space-section) * 0.7) 2rem;
}
.site-footer a {
  color: var(--cream);
  text-decoration: none;
}
.site-footer a:hover {
  color: var(--ember);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-gap);
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--line-dark);
}
.site-footer__brand img {
  height: 2.4rem;
  width: auto;
  margin-bottom: 1rem;
}
.site-footer :is(h3, h4) {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cream-mute);
  font-family: var(--font-body);
  font-weight: 700;
  margin-bottom: 1rem;
}
.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}
.site-footer .tel {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  color: var(--ember);
  font-feature-settings: "tnum";
}
.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.5rem;
  color: var(--cream-mute);
  font-size: var(--fs-small);
}
.site-footer__social {
  display: flex;
  gap: 1rem;
}
.site-footer__social a {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--line-dark);
  border-radius: 50%;
  transition: border-color 0.25s, background-color 0.25s;
}
.site-footer__social a:hover {
  border-color: var(--ember);
  background: color-mix(in oklab, var(--ember) 15%, transparent);
}
.site-footer__social svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}
@media (max-width: 800px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  translate: 0 24px;
  transition: opacity 0.7s ease, translate 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  translate: 0 0;
}
/* content must never be trapped invisible when JS doesn't run */
@media (scripting: none) {
  .reveal {
    opacity: 1;
    translate: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    translate: none;
    transition: none;
  }
  .brand-card,
  .brand-card__media img,
  .btn {
    transition: none;
  }
}

/* ---------- Utilities ---------- */
.grid-2 {
  display: grid;
  gap: var(--space-gap);
  grid-template-columns: repeat(2, 1fr);
  align-items: center;
}
@media (max-width: 800px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}
.text-center {
  text-align: center;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}