/* ==========================================================================
   archive.css — #archive + Big CTA
   ========================================================================== */

.opg-archive { background: var(--opg-paper-2); }

.opg-archive__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 880px) {
  .opg-archive__grid { grid-template-columns: 1fr; }
}

.opg-archive-card {
  display: block;
  border-radius: var(--opg-radius-lg);
  background: #fff;
  border: 1px solid var(--opg-border);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.opg-archive-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--opg-shadow-2);
}
.opg-archive-card__thumb {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--opg-paper-3);
}
.opg-archive-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.opg-archive-card__thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.4) 100%);
  z-index: 1;
}
.opg-archive-card__year {
  position: absolute;
  bottom: 20px;
  left: 24px;
  font-family: var(--opg-font-en);
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: #fff;
  z-index: 2;
  line-height: 1;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
.opg-archive-card__info { padding: 20px 24px; }
.opg-archive-card__cta {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--opg-border);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--opg-font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--opg-ink);
  width: 100%;
  transition: gap 0.2s ease;
}
.opg-archive-card:hover .opg-archive-card__cta {
  gap: 12px;
}

/* ============================== Big CTA ============================== */
.opg-bigcta {
  position: relative;
  background: var(--opg-ink);
  color: #fff;
  padding: clamp(80px, 12vw, 140px) 0;
  overflow: hidden;
  text-align: center;
}
.opg-bigcta__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.opg-bigcta__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.45) saturate(1.05);
}
.opg-bigcta::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 25%, oklch(50% 0.18 280 / 0.45), transparent 55%),
    radial-gradient(ellipse at 80% 75%, oklch(50% 0.22 30 / 0.35), transparent 55%),
    linear-gradient(180deg, rgba(0,0,0,0.4), rgba(0,0,0,0.55));
  pointer-events: none;
  z-index: 1;
}
.opg-bigcta .opg-container {
  position: relative;
  z-index: 2;
}
.opg-bigcta__inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}
.opg-bigcta__eyebrow {
  font-family: var(--opg-font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: none;
  color: rgba(255,255,255,0.75);
  margin: 0;
  padding: 6px 0;
  background: var(--opg-grad-rainbow);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.opg-bigcta__heading {
  font-size: clamp(36px, 7vw, 80px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
  padding: 0.06em 0.06em 0.12em;
  display: inline-block;
}
.opg-bigcta__heading-accent {
  display: inline-block;
  background: var(--opg-grad-rainbow);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding: 0 0.04em;
}

/* Gate button — Big CTA 局所スコープ */
.opg-bigcta .opg-btn--gate {
  position: relative;
  background: var(--opg-ink);
  color: #fff;
  padding-left: 36px;
  border: 1px solid rgba(255,255,255,0.14);
  box-shadow: 0 10px 28px -10px rgba(0,0,0,0.55);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.opg-bigcta .opg-btn--gate::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 22%;
  bottom: 22%;
  width: 4px;
  border-radius: 4px;
  background: var(--opg-grad-rainbow);
}
.opg-bigcta .opg-btn--gate:hover {
  border-color: rgba(255,255,255,0.28);
  box-shadow: 0 16px 40px -10px oklch(60% 0.18 240 / 0.5);
}
.opg-bigcta__lead {
  font-size: var(--opg-text-base);
  line-height: 1.95;
  color: rgba(255,255,255,0.75);
  max-width: 520px;
}