/* =========================================================================
   潤 ─ URUMI  ·  css/index.css
   Home page layout & visuals. Tokens only — no new hex, no new families.
   ========================================================================= */

/* -------------------------------------------------------------------------
   HEADER — fixed. On the light home field we use a SOLID readable colour
   (not mix-blend difference, which collapsed to near-invisible over the
   almost-white paper/gloss and hid the works/about links).
   ------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 9000;
  padding: clamp(0.9rem, 2vw, 1.6rem) 0;
  transition: padding var(--dur-2) var(--ease-out-quart);
}
.site-header.is-scrolled { padding: clamp(0.6rem, 1.2vw, 1rem) 0; }
.site-header__inner {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--page-inline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--color-fg);
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-1);
  letter-spacing: -0.02em;
  font-feature-settings: 'palt' 1;
  line-height: 1;
}
.brand__latin { font-weight: 300; letter-spacing: 0.04em; }

.site-nav {
  display: flex;
  align-items: baseline;
  gap: clamp(1rem, 2.4vw, 2.4rem);
}
.site-nav a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  position: relative;
  padding: 0.4em 0;
}
.site-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0.1em;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-1) var(--ease-out-quart);
}
.site-nav a:hover::after,
.site-nav a:focus-visible::after { transform: scaleX(1); }
.site-nav a[aria-current='page']::after { transform: scaleX(1); }
.site-nav a[aria-current='page'] { color: var(--color-accent); }
.site-nav__meta { align-self: center; color: var(--color-muted); }

.nav-toggle { display: none; }

/* -------------------------------------------------------------------------
   HERO
   ------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding-block: clamp(6rem, 12vh, 10rem) var(--space-6);
  padding-inline: var(--page-inline);
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-color: var(--color-bg);
  background-image:
    radial-gradient(80% 60% at 72% 24%, rgba(134,178,164,0.42), transparent 60%),
    radial-gradient(70% 55% at 18% 78%, rgba(43,76,120,0.22), transparent 62%),
    conic-gradient(from var(--angle) at 60% 40%, rgba(134,178,164,0.14), rgba(236,239,232,0.02), rgba(43,76,120,0.12));
  background-blend-mode: screen, screen, overlay;
}
.hero__mega {
  position: absolute;
  z-index: 1;
  top: 40%;
  left: -0.06em;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(6rem, 26vw, 28rem);
  line-height: 0.8;
  letter-spacing: -0.05em;
  pointer-events: none;
  white-space: nowrap;
}
.hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  display: grid;
  justify-items: end;
  text-align: right;
  gap: var(--space-3);
}
.hero__eyebrow { color: var(--color-fg); opacity: 0.7; }
.hero__headline {
  display: grid;
  justify-items: end;
  font-size: clamp(2.6rem, 9vw, 8.5rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
}
.hero__line { display: block; overflow: hidden; }
.hero__line--accent { color: var(--color-accent); }
.hero__body {
  max-width: 42ch;
  font-size: var(--step-0);
  color: color-mix(in srgb, var(--color-fg) 82%, transparent);
}
.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: flex-end;
}
.hero__scroll {
  font-family: var(--font-display);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-muted);
}
.hero__vlabel {
  position: absolute;
  z-index: 2;
  right: clamp(0.6rem, 2vw, 1.6rem);
  top: 50%;
  transform: translateY(-50%);
}

/* -------------------------------------------------------------------------
   STATEMENT
   ------------------------------------------------------------------------- */
.statement__index {
  grid-column: 1 / 3;
  display: flex;
  flex-direction: column;
  gap: 0.4em;
  padding-top: 0.6em;
}
.statement__body { grid-column: 5 / 12; }
.statement__body .hairline { margin-bottom: var(--space-3); }
.statement__headline {
  font-size: var(--step-3);
  margin-bottom: var(--space-3);
  max-width: 16ch;
}
.statement__lead {
  font-size: clamp(1.05rem, 0.9rem + 0.8vw, 1.5rem);
  line-height: 1.95;
  max-width: 40ch;
}

/* -------------------------------------------------------------------------
   WORKS PREVIEW
   ------------------------------------------------------------------------- */
.works__head { align-items: end; margin-bottom: var(--space-5); }
.works__title { grid-column: 1 / 8; display: grid; gap: var(--space-2); }
.works__title h2 { font-size: var(--step-3); }
.works__intro {
  grid-column: 8 / 13;
  align-self: end;
  color: color-mix(in srgb, var(--color-fg) 80%, transparent);
  max-width: 40ch;
}

.works__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  row-gap: var(--space-5);
}
.works__cell--a { grid-column: 1 / 7; }
.works__cell--b { grid-column: 8 / 13; margin-top: var(--space-6); }
.works__cell--c { grid-column: 3 / 10; }

.work-card {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid var(--color-hairline);
}
.works__cell--a .work-card { aspect-ratio: 4 / 5; }
.works__cell--b .work-card { aspect-ratio: 3 / 4; }
.works__cell--c .work-card { aspect-ratio: 16 / 10; }
.work-card__face {
  position: absolute;
  inset: 0;
  z-index: 0;
  transition: transform var(--dur-3) var(--ease-out-quart);
}
.work-card:hover .work-card__face { transform: scale(1.05); }
.work-card__no {
  position: absolute;
  top: clamp(0.6rem, 1.4vw, 1.2rem);
  left: clamp(0.8rem, 1.6vw, 1.4rem);
  z-index: 2;
  color: color-mix(in srgb, var(--jihaku) 78%, transparent);
  mix-blend-mode: soft-light;
}
.work-card__v {
  position: absolute;
  top: clamp(0.8rem, 1.6vw, 1.4rem);
  right: clamp(0.6rem, 1.4vw, 1.1rem);
  z-index: 2;
  color: color-mix(in srgb, var(--jihaku) 82%, transparent);
}
.work-card__meta {
  position: absolute;
  left: clamp(0.8rem, 1.6vw, 1.4rem);
  bottom: clamp(0.8rem, 1.6vw, 1.4rem);
  z-index: 2;
  display: grid;
  gap: 0.15em;
  color: var(--jihaku);
}
.work-card__jp {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--step-1);
  font-feature-settings: 'palt' 1;
  line-height: 1;
}
.work-card__en {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--step--1);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.86;
}
.works__foot { margin-top: var(--space-6); }
.works__all {
  display: inline-block;
  margin-top: var(--space-3);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step-1);
  letter-spacing: -0.01em;
  position: relative;
}
.works__all::after {
  content: '';
  position: absolute;
  left: 0; bottom: -0.1em;
  width: 100%; height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-2) var(--ease-out-quart);
}
.works__all:hover::after,
.works__all:focus-visible::after { transform: scaleX(1); }

/* -------------------------------------------------------------------------
   APPROACH — pinned signature scene
   ------------------------------------------------------------------------- */
.approach { position: relative; min-height: 220vh; }
.approach__sticky {
  position: sticky;
  top: 0;
  min-height: 100svh;
  display: flex;
  align-items: center;
}
.approach__inner {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  align-items: center;
  width: 100%;
}
.approach__stage { grid-column: 1 / 8; }
.approach__panel {
  position: relative;
  width: 100%;
  aspect-ratio: 5 / 4;
  overflow: hidden;
  border: 1px solid var(--color-hairline);
  display: grid;
  place-items: center;
}
.approach__contour {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  opacity: 0.7;
  mix-blend-mode: soft-light;
}
.approach__latin {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.4rem, 3.4vw, 3rem);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-fg) 60%, transparent);
  mix-blend-mode: soft-light;
}
.approach__text { grid-column: 9 / 13; display: grid; gap: var(--space-2); }
.approach__text h2 { font-size: var(--step-2); }
.approach__text p { color: color-mix(in srgb, var(--color-fg) 82%, transparent); }

/* -------------------------------------------------------------------------
   TERMS MARQUEE
   ------------------------------------------------------------------------- */
.terms { padding-block: var(--space-4); }
.terms .marquee { padding-block: clamp(1rem, 2.4vw, 2rem); }
.marquee-item--o {
  color: transparent;
  -webkit-text-stroke: 1px color-mix(in srgb, var(--color-fg) 42%, transparent);
}
.terms__note {
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: var(--step--1);
}

/* -------------------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------------------- */
.site-footer {
  position: relative;
  padding-block: var(--space-6) var(--space-4);
  overflow: hidden;
}
.footer__cta { margin-top: var(--space-4); align-items: start; }
.footer__lede { grid-column: 1 / 8; display: grid; gap: var(--space-2); }
.footer__headline { font-size: var(--step-2); display: grid; }
.footer__line { display: block; overflow: hidden; }
.footer__body { grid-column: 8 / 13; display: grid; gap: var(--space-3); align-self: end; }
.footer__body p { color: color-mix(in srgb, var(--color-fg) 82%, transparent); }
.footer__contact { font-family: var(--font-display); letter-spacing: 0.01em; }
.footer__contact .muted { color: var(--color-muted); }

.footer__mega { margin-block: var(--space-5) var(--space-3); line-height: 0.82; }
.footer__word {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.4rem, 13vw, 15rem);
  letter-spacing: -0.04em;
  font-feature-settings: 'palt' 1;
  word-break: keep-all;
  white-space: nowrap;
}
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-hairline);
}
.footer__nav { display: flex; gap: clamp(1rem, 2.4vw, 2.2rem); }
.footer__nav a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
.footer__nav a[aria-current='page'] { color: var(--color-accent); }
.footer__meta { font-size: var(--step--2); color: var(--color-muted); letter-spacing: 0.04em; }

/* -------------------------------------------------------------------------
   RESPONSIVE
   ------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .statement__body { grid-column: 4 / 13; }
  .works__title { grid-column: 1 / 9; }
  .works__intro { grid-column: 1 / 11; }
  .approach__stage { grid-column: 1 / 7; }
  .approach__text { grid-column: 8 / 13; }
}

@media (max-width: 720px) {
  .site-nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--page-inline);
    background: var(--color-deep);
    color: var(--jihaku);
    transform: translateY(-100%);
    transition: transform var(--dur-2) var(--ease-in-out-expo);
  }
  .site-nav.is-open { transform: translateY(0); }
  .site-nav a { font-size: var(--step-2); letter-spacing: 0.02em; }
  .site-nav a[aria-current='page'] { color: var(--color-accent); }
  .site-nav__meta { color: color-mix(in srgb, var(--jihaku) 70%, transparent); }
  body.nav-open .site-header__inner { color: var(--jihaku); }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 44px; height: 44px;
    z-index: 1;
  }
  .nav-toggle__bar {
    display: block;
    width: 26px; height: 1.5px;
    background: currentColor;
    margin-left: auto;
    transition: transform var(--dur-1) var(--ease-out-quart), opacity var(--dur-1) var(--ease-out-quart), width var(--dur-1) var(--ease-out-quart);
  }
  .nav-toggle.is-active .nav-toggle__bar:nth-child(1) { transform: translateY(3.75px) rotate(45deg); width: 26px; }
  .nav-toggle.is-active .nav-toggle__bar:nth-child(2) { transform: translateY(-3.75px) rotate(-45deg); width: 26px; }

  .hero { align-items: flex-end; }
  .hero__content { justify-items: start; text-align: left; }
  .hero__headline { justify-items: start; }
  .hero__actions { justify-content: flex-start; }
  .hero__vlabel { display: none; }
  .hero__mega { font-size: clamp(5rem, 34vw, 12rem); top: 34%; }

  .statement__index { grid-column: 1 / 3; flex-direction: row; gap: 0.8em; }
  .statement__body { grid-column: 1 / 3; }
  .statement__headline { max-width: none; }

  .works__title, .works__intro { grid-column: 1 / 3; }
  .works__grid { grid-template-columns: 1fr; row-gap: var(--space-4); }
  .works__cell--a, .works__cell--b, .works__cell--c { grid-column: 1 / -1; margin-top: 0; }
  .works__cell--c .work-card { aspect-ratio: 4 / 3; }

  .approach { min-height: auto; }
  .approach__sticky { position: static; min-height: auto; padding-block: var(--space-5); }
  .approach__inner { grid-template-columns: 1fr; row-gap: var(--space-4); }
  .approach__stage, .approach__text { grid-column: 1 / -1; }

  .footer__lede, .footer__body { grid-column: 1 / 3; }
  .footer__body { margin-top: var(--space-3); }
  .footer__word { white-space: normal; }
}

@media (max-width: 480px) {
  .statement__index, .statement__body,
  .works__title, .works__intro,
  .footer__lede, .footer__body { grid-column: 1 / -1; }
  .hero__mega { font-size: clamp(4.5rem, 40vw, 9rem); }
}

/* wide screens — keep the pinned scene comfortable */
@media (min-width: 1900px) {
  .approach { min-height: 200vh; }
}

@media (prefers-reduced-motion: reduce) {
  .approach { min-height: auto; }
  .approach__sticky { position: static; min-height: auto; padding-block: var(--space-6); }
  .work-card__face { transform: none !important; }
}