/* =============================================================
   NINE JAPAN — shared UI kit styles
   Loaded by every ui_kits/<surface>/index.html
   ============================================================= */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--nj-ink);
  color: var(--fg-1);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .04em;
  -webkit-font-smoothing: antialiased;
}

/* ---------- shell ---------- */
.kit-shell {
  max-width: 1440px;
  margin: 0 auto;
  position: relative;
}
.container { padding: 0 48px; }
@media (max-width: 720px) { .container { padding: 0 24px; } }

/* ---------- nav ---------- */
.nj-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 48px;
  background: rgba(10,10,10,.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(250,248,244,.10);
}
.nj-nav__left { display: flex; align-items: center; gap: 20px; }
.nj-nav__logo {
  font-family: var(--font-display);
  font-size: 30px;
  letter-spacing: .06em;
  line-height: 1;
  color: var(--fg-1);
}
.nj-nav__logo .gold { color: var(--nj-gold); }
.nj-nav__sep { width: 1px; height: 24px; background: rgba(250,248,244,.28); }
.nj-nav__tag {
  font-family: var(--font-sub-en); font-size: 10px; letter-spacing: .3em;
  text-transform: uppercase; color: var(--nj-gold);
}
.nj-nav__menu { display: flex; gap: 28px; align-items: center; }
.nj-nav__item {
  font-family: var(--font-sub-en);
  font-size: 12px; font-weight: 500; letter-spacing: .22em;
  text-transform: uppercase; color: var(--fg-1);
  display: flex; flex-direction: column; gap: 4px; line-height: 1;
  position: relative; padding-bottom: 2px;
  transition: color .35s var(--ease-out);
  cursor: pointer;
}
.nj-nav__item .sub {
  font-family: var(--font-body); font-size: 9px; font-weight: 400;
  letter-spacing: .18em; color: var(--nj-ash);
}
.nj-nav__item::after {
  content: ''; position: absolute; left: 0; bottom: -4px; width: 0; height: 1.5px;
  background: var(--nj-gold); transition: width .4s var(--ease-out);
}
.nj-nav__item:hover { color: var(--nj-gold); }
.nj-nav__item:hover::after { width: 100%; }
.nj-nav__item.is-active { color: var(--nj-gold); }
.nj-nav__item.is-active::after { width: 100%; }

.nj-nav__cta {
  font-family: var(--font-sub-en);
  font-size: 12px; font-weight: 600; letter-spacing: .24em; text-transform: uppercase;
  padding: 13px 24px;
  background: var(--nj-gold); color: var(--nj-ink);
  border: 1px solid var(--nj-gold); border-radius: 2px;
  display: inline-flex; gap: 12px; align-items: center;
  transition: background .35s var(--ease-out), color .35s var(--ease-out);
}
.nj-nav__cta:hover { background: var(--fg-1); border-color: var(--fg-1); }

@media (max-width: 920px) {
  .nj-nav__menu { display: none; }
  .nj-nav { padding: 14px 24px; }
  .nj-nav__tag, .nj-nav__sep { display: none; }
}

/* ---------- buttons ---------- */
.btn {
  font-family: var(--font-sub-en);
  font-size: 13px; font-weight: 600; letter-spacing: .22em; text-transform: uppercase;
  padding: 16px 32px;
  border: 1px solid var(--fg-1);
  background: var(--fg-1); color: var(--nj-ink);
  border-radius: 2px;
  display: inline-flex; gap: 14px; align-items: center;
  cursor: pointer;
  transition: background .35s var(--ease-out), color .35s var(--ease-out), border-color .35s var(--ease-out);
}
.btn:hover { background: var(--nj-gold); border-color: var(--nj-gold); color: var(--nj-ink); }
.btn:active { transform: scale(.985); transition: transform 80ms; }
.btn--ghost { background: transparent; color: var(--fg-1); }
.btn--ghost:hover { background: var(--fg-1); color: var(--nj-ink); }
.btn--gold { background: var(--nj-gold); border-color: var(--nj-gold); }
.btn--gold:hover { background: var(--fg-1); border-color: var(--fg-1); }
.btn--crimson { background: var(--nj-crimson); border-color: var(--nj-crimson); color: var(--fg-1); }
.btn--crimson:hover { background: var(--nj-crimson-deep); border-color: var(--nj-crimson-deep); color: var(--fg-1); }
.btn--on-light { border-color: var(--nj-ink); background: var(--nj-ink); color: var(--fg-1); }
.btn--on-light:hover { background: var(--nj-crimson); border-color: var(--nj-crimson); color: var(--fg-1); }

/* ---------- section blocks ---------- */
.section { padding: 128px 0; }
.section--paper { background: var(--nj-paper); color: var(--nj-ink); }
.section--ink { background: var(--nj-ink); color: var(--fg-1); }
.section--charcoal { background: var(--nj-charcoal); color: var(--fg-1); }
@media (max-width: 720px) { .section { padding: 80px 0; } }

.eyebrow {
  font-family: var(--font-sub-en);
  font-size: 12px; font-weight: 600; letter-spacing: .28em; text-transform: uppercase;
  color: var(--nj-gold);
  display: inline-flex; align-items: center; gap: 14px;
}
.eyebrow::before {
  content: ''; width: 32px; height: 1.5px; background: currentColor;
}
.eyebrow--crimson { color: var(--nj-crimson); }
.eyebrow--ink { color: var(--nj-ink); }

.section-title {
  font-family: var(--font-jp-sans); font-weight: 900;
  font-size: clamp(40px, 5.6vw, 80px);
  line-height: 1.1; letter-spacing: .04em;
  margin: 24px 0 0;
}
.section-title .en {
  font-family: var(--font-display); font-weight: 400;
  font-size: clamp(56px, 7vw, 128px);
  letter-spacing: .02em; display: block; line-height: .9;
  color: var(--nj-gold);
  margin-bottom: 10px;
}
.section-lead {
  font-family: var(--font-body); font-size: 17px; line-height: 1.95;
  letter-spacing: .04em; max-width: 660px; margin-top: 32px;
  color: var(--fg-2);
}
.section--paper .section-lead { color: var(--fg-invert-2); }

/* numeric counter (e.g. 01 / 06) */
.counter {
  font-family: var(--font-display); font-size: 18px; letter-spacing: .12em;
  color: var(--fg-2);
}
.counter .strong { color: var(--nj-gold); font-size: 36px; }

/* ---------- footer ---------- */
.nj-footer {
  background: var(--nj-ink); color: var(--fg-1);
  padding: 112px 48px 40px;
  border-top: 1px solid rgba(250,248,244,.10);
  position: relative; overflow: hidden;
}
.nj-footer__logo { margin-bottom: 4px; }
.nj-footer__logo img { height: 56px; width: auto; display: block; }
@media (max-width:640px){ .nj-footer__logo img { height: 44px; } }
.nj-footer__grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  margin-top: 64px; padding-top: 64px;
  border-top: 1px solid rgba(250,248,244,.18);
}
.nj-footer__col h4 {
  font-family: var(--font-sub-en);
  font-size: 11px; letter-spacing: .28em; text-transform: uppercase;
  color: var(--nj-gold); margin: 0 0 18px;
}
.nj-footer__col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.nj-footer__col li {
  font-family: var(--font-body); font-size: 13px; letter-spacing: .06em;
  color: var(--fg-1);
  display: flex; gap: 10px;
}
.nj-footer__col li .en {
  font-family: var(--font-sub-en); font-size: 11px; letter-spacing: .22em;
  color: var(--nj-ash); width: 76px; flex: none; padding-top: 2px;
}
.nj-footer__addr { font-family: var(--font-body); font-size: 13px; line-height: 1.85; color: var(--fg-2); word-break: keep-all; }
.nj-footer__addr b { color: var(--fg-1); display: block; font-weight: 500; margin-bottom: 4px; letter-spacing: .08em; }
.nj-footer__socials { display: flex; gap: 12px; margin-top: 18px; }
.nj-footer__socials a {
  width: 36px; height: 36px;
  border: 1px solid rgba(250,248,244,.32);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--fg-1);
  transition: border-color .35s var(--ease-out), background .35s var(--ease-out);
}
.nj-footer__socials a:hover { background: var(--nj-gold); border-color: var(--nj-gold); color: var(--nj-ink); }
.nj-footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 56px; padding-top: 24px;
  border-top: 1px solid rgba(250,248,244,.10);
  font-family: var(--font-mono); font-size: 11px; color: var(--nj-ash);
  letter-spacing: .06em;
}
.nj-footer__bottom ul { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }
.nj-footer__bottom a:hover { color: var(--nj-gold); }
@media (max-width: 920px) {
  .nj-footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .nj-footer__bottom { flex-direction: column; gap: 16px; }
}

/* ---------- fixed CTA pill (right side) ---------- */
.fixed-cta {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  font-family: var(--font-sub-en); font-size: 12px; font-weight: 600;
  letter-spacing: .26em; text-transform: uppercase;
  padding: 18px 24px;
  background: var(--nj-gold); color: var(--nj-ink);
  border-radius: 2px;
  display: inline-flex; align-items: center; gap: 12px;
  box-shadow: 0 18px 48px rgba(0,0,0,.5);
  transition: background .35s var(--ease-out);
}
.fixed-cta:hover { background: var(--fg-1); }

/* ---------- page index (left-side fixed) ---------- */
.page-index {
  position: fixed; left: 24px; top: 50%; transform: translateY(-50%); z-index: 40;
  display: flex; flex-direction: column; gap: 14px;
}
.page-index__item {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em;
  color: var(--nj-ash);
  display: flex; align-items: center; gap: 10px;
  cursor: pointer;
  transition: color .3s var(--ease-out);
}
.page-index__item::before {
  content: ''; width: 16px; height: 1px; background: var(--nj-ash);
  transition: width .35s var(--ease-out), background .35s var(--ease-out);
}
.page-index__item.is-active { color: var(--nj-gold); }
.page-index__item.is-active::before { width: 48px; background: var(--nj-gold); }
@media (max-width: 1200px) { .page-index { display: none; } }

/* ---------- placeholder image (when no real photo provided) ---------- */
.ph-img {
  background: linear-gradient(135deg, #1c1c1c, #0a0a0a);
  position: relative; overflow: hidden;
}
.ph-img::before {
  content: ''; position: absolute; inset: 0;
  background-image: url('../img/grain.svg');
  background-size: 200px 200px; opacity: .35;
  mix-blend-mode: overlay;
}
.ph-img::after {
  content: attr(data-label); position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-sub-en); font-size: 11px; letter-spacing: .3em;
  color: rgba(250,248,244,.35); text-transform: uppercase;
  white-space: nowrap;
}
.ph-img--gold { background: linear-gradient(135deg, #8E7340, #c8a664); }
.ph-img--paper { background: var(--nj-paper-2); }
.ph-img--paper::after { color: rgba(10,10,10,.32); }
.ph-img--crimson { background: linear-gradient(135deg, #8e0a20, #c8102e); }

/* ---------- text reveal animation ---------- */
@keyframes nj-rise {
  0% { transform: translateY(40px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}
.rise { animation: nj-rise .9s var(--ease-out) both; }
.rise.d1 { animation-delay: .08s; }
.rise.d2 { animation-delay: .16s; }
.rise.d3 { animation-delay: .24s; }
.rise.d4 { animation-delay: .32s; }
.rise.d5 { animation-delay: .40s; }