/* =========================================================================
   MISUJI — Système de design partagé
   Rouge sushi profond & chaleureux · serif japonisant · clair/sombre
   ========================================================================= */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { min-height: 100vh; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
img, picture, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ---------- Tokens : mode clair (défaut) ---------- */
:root {
  /* couleur de marque — rouge sushi profond, chaleureux */
  --brand:        #A23527;
  --brand-deep:   #7C2317;
  --brand-bright: #C04A35;
  --brand-tint:   #F3E3DC;     /* voile rosé chaud */
  --gold:         #B98C4E;     /* filet doré discret */
  --gold-soft:    #D8B987;

  /* neutres chauds */
  --bg:        #FAF5EF;
  --bg-alt:    #F2E9DF;        /* sable */
  --surface:   #FFFFFF;
  --surface-2: #FBF6F0;
  --ink:       #211913;
  --ink-soft:  #6A5F55;
  --ink-faint: #9A8E81;
  --line:      #E6DACD;
  --line-soft: #EFE6DA;

  --hero-ink:  #FBF3E9;        /* texte sur fond sombre/rouge */

  --shadow-sm: 0 2px 10px rgba(50,30,20,.06);
  --shadow-md: 0 18px 50px -24px rgba(60,30,18,.35);
  --shadow-lg: 0 40px 90px -40px rgba(50,20,12,.45);

  --r-sm: 6px;
  --r-md: 14px;
  --r-lg: 24px;
  --r-xl: 34px;

  --maxw: 1240px;
  --pad:  clamp(20px, 5vw, 80px);

  --font-display: "Shippori Mincho", "Noto Serif JP", Georgia, serif;
  --font-body: "Jost", "Helvetica Neue", Arial, sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);

  color-scheme: light;
}

/* ---------- Tokens : mode sombre ---------- */
[data-theme="dark"] {
  --brand:        #D9583F;
  --brand-deep:   #A23527;
  --brand-bright: #E8694C;
  --brand-tint:   #2A1A15;
  --gold:         #D8B987;
  --gold-soft:    #E8D2A8;

  --bg:        #16110E;
  --bg-alt:    #1E1714;
  --surface:   #1F1814;
  --surface-2: #251D18;
  --ink:       #F2E9DD;
  --ink-soft:  #B6A89A;
  --ink-faint: #7C6F62;
  --line:      #352A23;
  --line-soft: #2A211B;

  --hero-ink:  #FBF3E9;

  --shadow-sm: 0 2px 10px rgba(0,0,0,.4);
  --shadow-md: 0 18px 50px -24px rgba(0,0,0,.7);
  --shadow-lg: 0 40px 90px -40px rgba(0,0,0,.8);

  color-scheme: dark;
}

/* ---------- Base ---------- */
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 300;
  letter-spacing: .005em;
  transition: background .5s var(--ease), color .5s var(--ease);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--ink);
}

.display {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: .98;
  letter-spacing: -.015em;
}

/* libellé kana / japonais vertical ou horizontal */
.kana {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--brand);
  letter-spacing: .14em;
}

/* eyebrow — petit label en capitales espacées */
.eyebrow {
  font-family: var(--font-body);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .34em;
  font-size: .72rem;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: .7em;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--brand);
  display: inline-block;
}
.eyebrow.center::after {
  content: "";
  width: 26px; height: 1px;
  background: var(--brand);
  display: inline-block;
}
.eyebrow.center { justify-content: center; }

/* ---------- Layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }
.section { padding-block: clamp(64px, 9vw, 140px); }
.section-tight { padding-block: clamp(48px, 6vw, 92px); }

/* ---------- Boutons ---------- */
.btn {
  --bg-btn: var(--brand);
  --fg-btn: #FBF3E9;
  display: inline-flex; align-items: center; gap: .6em;
  padding: 1em 1.7em;
  background: var(--bg-btn);
  color: var(--fg-btn);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: .9rem;
  letter-spacing: .04em;
  white-space: nowrap;
  border-radius: 100px;
  position: relative;
  overflow: hidden;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), background .3s var(--ease);
  box-shadow: 0 10px 26px -12px rgba(124,35,23,.55);
}
.btn::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,.22), transparent 70%);
  transform: translateX(-120%);
  transition: transform .7s var(--ease);
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 18px 38px -14px rgba(124,35,23,.6); }
.btn:hover::after { transform: translateX(120%); }
.btn .arrow { transition: transform .4s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

.btn-outline {
  background: transparent;
  color: var(--ink);
  box-shadow: none;
  border: 1px solid var(--line);
}
.btn-outline:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-3px); box-shadow: none; }

.btn-light {
  background: var(--hero-ink);
  color: var(--brand-deep);
  box-shadow: 0 14px 34px -16px rgba(0,0,0,.5);
}
.btn-ghost-light {
  background: transparent; color: var(--hero-ink);
  border: 1px solid rgba(251,243,233,.5); box-shadow: none;
}
.btn-ghost-light:hover { background: rgba(251,243,233,.12); border-color: var(--hero-ink); transform: translateY(-3px); }

.btn-sm { padding: .7em 1.2em; font-size: .82rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color .4s var(--ease), background .4s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--line); }
.header-inner {
  max-width: var(--maxw); margin-inline: auto;
  padding: 0 var(--pad);
  height: 78px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}

/* logo */
.logo { display: flex; align-items: center; gap: 13px; flex-shrink: 0; }
.logo-mark {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--brand); display: grid; place-items: center;
  box-shadow: 0 6px 16px -6px rgba(124,35,23,.55);
  transition: transform .5s var(--ease), background .3s var(--ease);
}
.logo:hover .logo-mark { transform: rotate(-6deg) scale(1.04); }
.logo-mark img { width: 30px; height: auto; }
.logo-text { line-height: 1; }
.logo-text b {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.5rem; letter-spacing: .02em; display: block; color: var(--ink);
}
.logo-text span {
  font-family: var(--font-body); font-weight: 400;
  text-transform: uppercase; letter-spacing: .42em;
  font-size: .56rem; color: var(--ink-soft);
}

/* nav */
.main-nav { display: flex; align-items: center; gap: 34px; }
.main-nav a {
  font-family: var(--font-body); font-weight: 400;
  font-size: .94rem; letter-spacing: .02em; color: var(--ink-soft);
  position: relative; padding: 6px 0; transition: color .3s var(--ease);
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--brand);
  transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease);
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--ink); }
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { transform: scaleX(1); }

/* outils header (langue + thème + cta) */
.header-tools { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }

.lang-switch { display: inline-flex; align-items: center; font-size: .8rem; font-weight: 500; color: var(--ink-faint); gap: 2px; }
.lang-switch button { padding: 4px 6px; border-radius: 6px; color: var(--ink-faint); transition: color .25s; letter-spacing: .04em; }
.lang-switch button.active { color: var(--brand); }
.lang-switch .sep { opacity: .4; }

.theme-toggle {
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--line);
  display: grid; place-items: center; color: var(--ink-soft);
  transition: color .3s, border-color .3s, transform .5s var(--ease);
}
.theme-toggle:hover { color: var(--brand); border-color: var(--brand); transform: rotate(18deg); }
.theme-toggle svg { width: 19px; height: 19px; }
.theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }

/* burger */
.burger { display: none; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); place-items: center; }
.burger span { position: relative; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s var(--ease); }
.burger span::before, .burger span::after { content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s var(--ease); }
.burger span::before { top: -6px; } .burger span::after { top: 6px; }
body.nav-open .burger span { background: transparent; }
body.nav-open .burger span::before { top: 0; transform: rotate(45deg); }
body.nav-open .burger span::after { top: 0; transform: rotate(-45deg); }

/* drawer mobile */
.mobile-nav {
  position: fixed; inset: 78px 0 0; z-index: 99;
  background: var(--bg);
  padding: 40px var(--pad) 60px;
  display: flex; flex-direction: column; gap: 6px;
  transform: translateY(-12px); opacity: 0; pointer-events: none;
  transition: opacity .4s var(--ease), transform .4s var(--ease);
  overflow-y: auto;
}
body.nav-open .mobile-nav { opacity: 1; transform: none; pointer-events: auto; }
.mobile-nav a {
  font-family: var(--font-display); font-size: 2rem; font-weight: 500;
  padding: 14px 0; border-bottom: 1px solid var(--line-soft); color: var(--ink);
  display: flex; align-items: baseline; gap: 14px;
}
.mobile-nav a .mi { font-family: var(--font-body); font-size: .8rem; color: var(--brand); letter-spacing: .1em; }
.mobile-theme-toggle { display: none; margin-top: 18px; align-self: flex-start; }
.mobile-nav .mobile-cta { margin-top: 28px; padding-left: 22px;}

/* ---------- Footer ---------- */
.site-footer { background: var(--brand-deep); color: var(--hero-ink); position: relative; overflow: hidden; }
[data-theme="dark"] .site-footer { background: #0E0A08; border-top: 1px solid var(--line); }
.site-footer .seigaiha { position: absolute; inset: 0; opacity: .08; pointer-events: none; }
.footer-grid {
  position: relative;
  max-width: var(--maxw); margin-inline: auto; padding: clamp(56px,7vw,96px) var(--pad) 0;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 48px;
}
.footer-brand .logo-text b { color: var(--hero-ink); }
.footer-brand p { color: rgba(251,243,233,.7); margin-top: 18px; max-width: 30ch; font-size: .95rem; }
.footer-col h4 { font-family: var(--font-body); font-weight: 500; text-transform: uppercase; letter-spacing: .2em; font-size: .72rem; color: var(--gold-soft); margin-bottom: 18px; }
.footer-col a, .footer-col p { color: rgba(251,243,233,.78); font-size: .95rem; padding: 5px 0; display: block; transition: color .3s; }
.footer-col a:hover { color: var(--hero-ink); }
.footer-bottom {
  position: relative; max-width: var(--maxw); margin-inline: auto; margin-top: clamp(48px,6vw,80px);
  padding: 24px var(--pad); border-top: 1px solid rgba(251,243,233,.15);
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  font-size: .82rem; color: rgba(251,243,233,.6);
}
.footer-social { display: flex; gap: 12px; }
.footer-social a { width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(251,243,233,.25); display: grid; place-items: center; transition: .3s var(--ease); }
.footer-social a:hover { background: var(--hero-ink); color: var(--brand-deep); transform: translateY(-3px); }
.footer-social svg { width: 16px; height: 16px; }

/* ---------- Reveal au scroll ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }
.reveal-d4 { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- Motifs ---------- */
.seigaiha-bg {
  background-image: radial-gradient(circle at 50% 100%, transparent 38%, currentColor 39%, currentColor 41%, transparent 42%);
  background-size: 40px 20px;
}

/* ---------- i18n helpers ---------- */
[data-lang-en] { display: none; }
html[data-lang="en"] [data-lang-fr] { display: none; }
html[data-lang="en"] [data-lang-en] { display: revert; }

/* ---------- Responsive header ---------- */
@media (max-width: 940px) {
  .main-nav { display: none; }
  .header-tools .header-cta { display: none; }
  .header-tools .theme-toggle { display: none; }
  .burger { display: grid; }
  .mobile-theme-toggle { display: grid; }
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  body { font-size: 16px; }
  .footer-grid { grid-template-columns: 1fr; }
}