/* Variant overlays — A / B / C / D / E
   Applied to <body class="variant-x"> by the switcher.
*/

/* ── Variant A : Classic Stack ───────────────────────────────────────── */
/* Default look. The base CSS already matches A. Just an accent color cue. */
.variant-a .hero { background: var(--paper); }
.variant-a .mission-band { background: var(--tan); }

/* ── Variant B : Manifesto ───────────────────────────────────────────── */
.variant-b .hero {
  background: var(--paper);
  padding-top: 100px;
  padding-bottom: 110px;
}
.variant-b .hero__title {
  font-size: 112px;
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.03em;
}
@media (max-width: 1023px) {
  .variant-b .hero__title { font-size: 72px; }
}
@media (max-width: 767px) {
  .variant-b .hero__title { font-size: 44px; }
  .variant-b .hero { padding-top: 56px; padding-bottom: 64px; }
}

.variant-b .mission-band {
  background: var(--ink);
  color: var(--paper);
}
.variant-b .mission-band__label { opacity: 0.55; }
.variant-b .mission-band__text { font-weight: 500; }

.variant-b .biz-card {
  border-color: var(--ink);
  background: var(--paper);
}
.variant-b .section-head__en { font-weight: 900; letter-spacing: -0.01em; }

.variant-b .site-header {
  border-bottom: 2px solid var(--ink);
}

/* Featured case full-bleed for B */
.variant-b .featured-case {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--ink);
}
.variant-b .featured-case .ph { aspect-ratio: auto; min-height: 420px; border: none; border-right: 1px solid var(--ink); }
.variant-b .featured-case__text { padding: 56px; display: flex; flex-direction: column; gap: 16px; justify-content: center; }
.variant-b .featured-case__title { font-size: 32px; font-weight: 700; line-height: 1.35; }
@media (max-width: 1023px) {
  .variant-b .featured-case { grid-template-columns: 1fr; }
  .variant-b .featured-case .ph { border-right: none; border-bottom: 1px solid var(--ink); min-height: 280px; }
  .variant-b .featured-case__text { padding: 32px 28px; }
}

/* ── Variant C : Sidebar ─────────────────────────────────────────────── */
/* When variant C is active, hide the top site-header and show sidebar layout */
.variant-c .site-header { display: none; }
.variant-c .hamburger { display: none; }
.variant-c .mobile-drawer { display: none !important; }
.variant-c .with-sidebar { display: grid; }
.variant-c .page { display: block; }

/* In other variants, hide the sidebar wrapper structure */
body:not(.variant-c) .site-sidebar { display: none; }
body:not(.variant-c) .with-sidebar { display: contents; }

.variant-c .mission-band {
  background: transparent;
  padding: 24px 56px;
  display: flex;
  align-items: baseline;
  gap: 20px;
}
.variant-c .mission-band__label { margin-bottom: 0; flex-shrink: 0; }
.variant-c .mission-band__text { font-size: 18px; }

/* Variant C: horizontal works scroll on PC */
@media (min-width: 1024px) {
  .variant-c .works-grid {
    display: flex;
    overflow-x: auto;
    gap: 18px;
    padding-bottom: 16px;
  }
  .variant-c .works-grid .work-card { flex: 0 0 280px; }
}

/* Variant C: list-style biz on PC */
@media (min-width: 1024px) {
  .variant-c .biz-grid { grid-template-columns: 1fr; gap: 0; }
  .variant-c .biz-card {
    flex-direction: row;
    align-items: baseline;
    gap: 32px;
    border-left: none;
    border-right: none;
    border-top: none;
    min-height: 0;
    padding: 24px 0;
  }
  .variant-c .biz-card__title { flex: 0 0 240px; }
  .variant-c .biz-card__desc { margin-top: 0; }
}

@media (max-width: 1023px) {
  .variant-c .mission-band {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 28px;
    gap: 8px;
  }
}

/* ── Variant D : Magazine Grid ───────────────────────────────────────── */
.variant-d .hero { grid-template-columns: 7fr 5fr; }
.variant-d .hero__title {
  font-family: var(--font-base);
  font-weight: 700;
  font-style: italic;
  letter-spacing: -0.015em;
}

.variant-d .mission-band {
  background: transparent;
}
.variant-d .mission-band__inner {
  border: 2px solid var(--ink);
  padding: 28px;
  font-style: italic;
}

/* Magazine asymmetric biz layout */
.variant-d .biz-grid {
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(180px, auto);
  gap: 16px;
}
.variant-d .biz-card:nth-child(1) { grid-column: span 7; }
.variant-d .biz-card:nth-child(2) { grid-column: span 5; }
.variant-d .biz-card:nth-child(3) { grid-column: span 4; }
.variant-d .biz-card:nth-child(4) { grid-column: span 4; }
.variant-d .biz-card:nth-child(5) { grid-column: span 4; }
.variant-d .biz-card:nth-child(6) { grid-column: span 12; background: var(--tan); }

.variant-d .biz-card__title { font-style: italic; }

@media (max-width: 1023px) {
  .variant-d .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .variant-d .biz-card:nth-child(n) { grid-column: span 1; }
}
@media (max-width: 767px) {
  .variant-d .biz-grid { grid-template-columns: 1fr; }
}

/* ── Variant E : Domain Matrix ───────────────────────────────────────── */
.variant-e .hero {
  grid-template-columns: 1fr 1.4fr;
  align-items: center;
}
.variant-e .hero__title { font-weight: 700; }

.variant-e .hero__matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--ink);
}
.variant-e .hero__matrix > div {
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 20px;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 120px;
  background: var(--paper);
}
.variant-e .hero__matrix > div:nth-child(3n) { border-right: none; }
.variant-e .hero__matrix > div:nth-child(n+4) { border-bottom: none; }
.variant-e .hero__matrix > div.is-accent { background: var(--accent-soft); }
.variant-e .hero__matrix .num { font-family: ui-monospace, monospace; font-size: 10px; opacity: 0.55; }
.variant-e .hero__matrix .en { font-family: ui-monospace, monospace; font-size: 9px; opacity: 0.5; letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; font-weight: 400; }

@media (max-width: 1023px) {
  .variant-e .hero { grid-template-columns: 1fr; }
  .variant-e .hero__matrix > div { min-height: 100px; padding: 16px; }
}

.variant-e .mission-band {
  background: transparent;
  padding: 28px 56px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 32px;
  align-items: center;
}
.variant-e .mission-band__label { margin-bottom: 0; }
.variant-e .mission-band__text { font-size: 20px; }
.variant-e .mission-band__vision {
  font-family: ui-monospace, monospace;
  font-size: 11px;
  opacity: 0.6;
}

@media (max-width: 1023px) {
  .variant-e .mission-band {
    grid-template-columns: 1fr;
    padding: 24px 28px;
    gap: 8px;
  }
  .variant-e .mission-band__vision { display: none; }
}
