/* SOURCE OF TRUTH: develop_web/design-system/ — 직접 수정 금지, develop_web/scripts/sync_design.py로 동기 */
/* Requires design-tokens.css */

/* ─────────────────────────────────────────
   Single Polaroid card
───────────────────────────────────────── */
.pol-card {
  background: var(--bg-card);
  padding: var(--pol-pad);
  box-shadow: var(--shadow-card);
  width: var(--pol-width);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.pol-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  display: block;
  background: var(--cream-400);
}

.pol-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.pol-num {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 100;
  font-size: 0.6rem;
  color: var(--gold-mid);
  display: block;
  margin-top: 5px;
}

.pol-caption {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 200;
  font-size: 0.72rem;
  color: #999;
  text-align: center;
  margin-top: 2px;
}

/* ─────────────────────────────────────────
   Group: cascade ↔ inverted pyramid toggle
   Usage: <div class="pol-group"> × 3 .pol-card
          JS: group.classList.toggle('open')
───────────────────────────────────────── */
.pol-group {
  position: relative;
  min-height: 300px;
  cursor: pointer;
  user-select: none;
}

/* All cards anchored to the same center point */
.pol-group .pol-card {
  position: absolute;
  left: 50%;
  top: 40%;
  margin-left: calc(var(--pol-width) / -2);
  margin-top: calc(var(--pol-width) / -2);
  transition:
    transform var(--pol-ease),
    box-shadow var(--pol-ease);
  will-change: transform;
}

/* ── Collapsed: Polaroid Cascade (E4-21) ── */
.pol-group .pol-card:nth-child(1) {
  transform: translate(-22px, -8px) rotate(-8deg);
  z-index: 1;
}
.pol-group .pol-card:nth-child(2) {
  transform: translate(0px, 10px) rotate(4deg);
  z-index: 2;
}
.pol-group .pol-card:nth-child(3) {
  transform: translate(22px, -5px) rotate(-2deg);
  z-index: 3;
}

/* ── Expanded: Inverted Pyramid (E4-12) — TL · TR · BOT ── */
.pol-group.open .pol-card:nth-child(1) {
  transform: translate(-130px, -70px) rotate(-5deg);
  box-shadow: var(--shadow-card-open);
  z-index: 1;
}
.pol-group.open .pol-card:nth-child(2) {
  transform: translate(130px, -70px) rotate(6deg);
  box-shadow: var(--shadow-card-open);
  z-index: 2;
}
.pol-group.open .pol-card:nth-child(3) {
  transform: translate(0px, 95px) rotate(-2deg);
  box-shadow: var(--shadow-card-open);
  z-index: 3;
}

/* Individual hover lift when expanded */
.pol-group.open .pol-card:hover {
  box-shadow: var(--shadow-card-lift);
  filter: brightness(1.02);
}

/* ── Mobile (≤640px): flat list, tilt only ── */
@media (max-width: 640px) {
  .pol-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    min-height: auto;
    cursor: default;
  }
  .pol-group .pol-card {
    position: static;
    margin: 0;
  }
  .pol-group .pol-card:nth-child(1) { transform: rotate(-3deg); }
  .pol-group .pol-card:nth-child(2) { transform: rotate(2deg); }
  .pol-group .pol-card:nth-child(3) { transform: rotate(-1deg); }
  .pol-group.open .pol-card:nth-child(1),
  .pol-group.open .pol-card:nth-child(2),
  .pol-group.open .pol-card:nth-child(3) {
    transform: none;
    box-shadow: var(--shadow-card);
  }
}