/* ── Wiki Gallery v2: Observatory ───────────────────────────────
   Fonts loaded by extra.css — no duplicate @import here.
   Design tokens derived from the site-wide system in extra.css.
   ─────────────────────────────────────────────────────────────── */

/* ── gallery-specific tokens (derived from site design system) ── */
:root {
  --wg-concept:       var(--site-accent, #0d9373);
  --wg-concept-soft:  var(--site-accent-faint, rgba(13, 147, 115, 0.08));
  --wg-concept-glow:  rgba(13, 147, 115, 0.25);
  --wg-entity:        var(--site-warm, #d4623b);
  --wg-entity-soft:   var(--site-warm-faint, rgba(212, 98, 59, 0.08));
  --wg-entity-glow:   rgba(212, 98, 59, 0.25);
  --wg-radius:        12px;
}

[data-md-color-scheme="slate"] {
  --wg-concept-glow:  rgba(45, 196, 141, 0.30);
  --wg-entity-glow:   rgba(255, 152, 110, 0.30);
}

/* ── page chrome ─────────────────────────────────────────────── */
.wg-header {
  text-align: center;
  padding: 2.5rem 0 0.5rem;
}

.wg-header h1 {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 0 0 0.2rem;
  background: linear-gradient(135deg,
    var(--md-default-fg-color) 40%,
    var(--wg-concept) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.wg-header p {
  font-family: var(--font-body);
  font-size: 0.85rem;
  opacity: 0.5;
  margin: 0;
  letter-spacing: 0.04em;
}

/* ── toolbar ─────────────────────────────────────────────────── */
.wg-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 1.4rem 0 2rem;
  flex-wrap: wrap;
}

.wg-filter-btn {
  padding: 0.4rem 1.1rem;
  border-radius: 8px;
  border: 1.5px solid transparent;
  background: var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color--light);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.wg-filter-btn:hover {
  background: var(--wg-concept-soft);
  color: var(--wg-concept);
}

.wg-filter-btn.active {
  background: var(--wg-concept);
  color: #fff;
  border-color: var(--wg-concept);
}

.wg-gacha-btn {
  padding: 0.4rem 1.3rem;
  border-radius: 8px;
  border: none;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #f0c27f;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

[data-md-color-scheme="slate"] .wg-gacha-btn {
  background: linear-gradient(135deg, #f0c27f 0%, #fc5c7d 100%);
  color: #1a1a2e;
}

.wg-gacha-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(240, 194, 127, 0.3);
}

.wg-gacha-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  transform: translateX(-100%);
  animation: wg-shimmer 3s ease-in-out infinite;
}

@keyframes wg-shimmer {
  0%, 100% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
}

/* ── grid ────────────────────────────────────────────────────── */
.wg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  grid-auto-rows: auto;
  grid-auto-flow: dense; /* fill gaps left by span-2 cards */
  gap: 1rem;
  margin-bottom: 3rem;
}

/* ── cards ────────────────────────────────────────────────────── */
.wg-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--wg-radius);
  padding: 1.3rem 1.4rem 1.1rem;
  text-decoration: none !important;
  color: var(--md-default-fg-color) !important;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  overflow: hidden;
  cursor: pointer;
  transition:
    transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    box-shadow 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    border-color 0.3s;

  /* entrance */
  opacity: 0;
  transform: translateY(24px) scale(0.97);
  animation: wg-enter 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes wg-enter {
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Card with PNG: frosted glass front + flip to full image ───── */

/* Front face: PNG as background with frosted glass overlay */
.wg-card.wg-flippable .wg-card-front {
  background-size: cover;
  background-position: top center;
  background-repeat: no-repeat;
  position: relative;
  border-radius: inherit;
  overflow: hidden;
}

/* Glass overlay on front — light mode default */
.wg-card.wg-flippable .wg-card-front::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(6px) saturate(1.4);
  -webkit-backdrop-filter: blur(6px) saturate(1.4);
  z-index: 0;
}

[data-md-color-scheme="slate"] .wg-card.wg-flippable .wg-card-front::before {
  background: rgba(30, 30, 46, 0.5);
}

/* Lift front content above glass */
.wg-card.wg-flippable .wg-card-front > * {
  position: relative;
  z-index: 1;
}

/* ── Card flip (hover reveals full PNG on back) ────────────────── */
.wg-card.wg-flippable {
  perspective: 800px;
}

.wg-card-front {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.wg-card.wg-flippable .wg-card-front,
.wg-card.wg-flippable .wg-card-back {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.wg-card-back {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  transform: rotateY(180deg);
  overflow: hidden;
  background-size: cover;
  background-position: top center;
  background-repeat: no-repeat;
  background-color: var(--md-default-bg-color);
}

.wg-card.wg-flippable:hover .wg-card-front {
  transform: rotateY(-180deg);
}

.wg-card.wg-flippable:hover .wg-card-back {
  transform: rotateY(0deg);
}

/* Disable lift transform on flippable cards (flip handles the motion) */
.wg-card.wg-flippable:hover {
  transform: none;
}

/* left accent bar */
.wg-card::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  transition: width 0.3s, opacity 0.3s;
  z-index: 2;
}

.wg-card[data-section="concepts"]::before {
  background: var(--wg-concept);
}

.wg-card[data-section="entities"]::before {
  background: var(--wg-entity);
}

/* hover — gentle lift only (preview panel handles detail) */
.wg-card:hover {
  transform: translateY(-3px);
  border-color: transparent;
}

.wg-card:hover::before {
  width: 4px;
}

.wg-card[data-section="concepts"]:hover {
  box-shadow:
    0 8px 24px -6px var(--wg-concept-glow),
    0 4px 12px rgba(0,0,0,0.06);
}

.wg-card[data-section="entities"]:hover {
  box-shadow:
    0 8px 24px -6px var(--wg-entity-glow),
    0 4px 12px rgba(0,0,0,0.06);
}

/* ── card: badge ─────────────────────────────────────────────── */
.wg-card-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 5px;
  margin-bottom: 0.7rem;
  width: fit-content;
}

.wg-card[data-section="concepts"] .wg-card-badge {
  background: var(--wg-concept-soft);
  color: var(--wg-concept);
}

.wg-card[data-section="entities"] .wg-card-badge {
  background: var(--wg-entity-soft);
  color: var(--wg-entity);
}

/* ── card: title ─────────────────────────────────────────────── */
.wg-card-title {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.4rem;
}

/* ── card: description ───────────────────────────────────────── */
.wg-card-desc {
  font-family: var(--font-body);
  font-size: 0.78rem;
  line-height: 1.65;
  opacity: 0.58;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  flex: 1;
}

/* ── card: heat indicator (bottom bar) ───────────────────────── */
.wg-card-heat {
  margin-top: auto;
  padding-top: 0.8rem;
}

.wg-heat-bar {
  height: 2px;
  border-radius: 1px;
  background: var(--md-default-fg-color--lightest);
  overflow: hidden;
}

.wg-heat-fill {
  height: 100%;
  border-radius: 1px;
  width: 0%;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.wg-card[data-section="concepts"] .wg-heat-fill {
  background: linear-gradient(90deg, var(--wg-concept), #2dc48d);
}

.wg-card[data-section="entities"] .wg-heat-fill {
  background: linear-gradient(90deg, var(--wg-entity), #f0a07a);
}

/* ── SIZE: large (hero card) ─────────────────────────────────── */
.wg-card.wg-lg {
  grid-column: span 2;
  padding: 1.8rem 2rem 1.4rem;
}

.wg-card.wg-lg::before {
  width: 4px;
  top: 16px;
  bottom: 16px;
}

.wg-card.wg-lg .wg-card-badge {
  font-size: 0.7rem;
  padding: 0.25rem 0.7rem;
}

.wg-card.wg-lg .wg-card-title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 0.6rem;
}

.wg-card.wg-lg .wg-card-desc {
  font-size: 0.88rem;
  -webkit-line-clamp: 6;
  opacity: 0.6;
  line-height: 1.8;
}

/* ── SIZE: medium ────────────────────────────────────────────── */
.wg-card.wg-md {
  /* base styles are the default */
}

/* ── SIZE: small (compact) ───────────────────────────────────── */
.wg-card.wg-sm {
  padding: 1rem 1.1rem 0.9rem;
}

.wg-card.wg-sm .wg-card-badge {
  font-size: 0.6rem;
  padding: 0.15rem 0.45rem;
  margin-bottom: 0.5rem;
}

.wg-card.wg-sm .wg-card-title {
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}

.wg-card.wg-sm .wg-card-desc {
  font-size: 0.72rem;
  -webkit-line-clamp: 2;
}

/* ── SIZE: featured (dark hero, for top-1 card) ──────────────── */
a.wg-card.wg-featured,
.wg-card.wg-featured {
  grid-column: span 2;
  padding: 2.2rem 2.4rem 1.6rem;
  border: none !important;
}

.wg-card.wg-featured::before {
  display: none;
}

.wg-card.wg-featured .wg-card-title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 400;
  margin-bottom: 0.7rem;
}

.wg-card.wg-featured .wg-card-desc {
  opacity: 1;
  font-size: 0.92rem;
  -webkit-line-clamp: 8;
  line-height: 1.85;
}

.wg-card.wg-featured:hover {
  box-shadow:
    0 20px 60px -12px rgba(0,0,0,0.5),
    0 4px 16px rgba(0,0,0,0.15);
  transform: translateY(-6px) scale(1.01);
}

/* ── Gacha overlay ───────────────────────────────────────────── */
.wg-gacha-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

.wg-gacha-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.wg-gacha-stage {
  perspective: 1000px;
  width: 380px;
  max-width: 88vw;
}

.wg-gacha-card {
  position: relative;
  border-radius: 16px;
  padding: 2.5rem 2rem 2rem;
  text-align: center;
  transform: rotateY(90deg) scale(0.7);
  transition: transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
  overflow: hidden;
}

/* concept gacha card */
.wg-gacha-card[data-section="concepts"] {
  background: linear-gradient(160deg, #0b3d35 0%, #114b5f 60%, #1a2940 100%);
  color: #fff;
  box-shadow: 0 24px 80px -16px rgba(13, 147, 115, 0.4);
}

/* entity gacha card */
.wg-gacha-card[data-section="entities"] {
  background: linear-gradient(160deg, #3d1c0b 0%, #5f2f11 60%, #40291a 100%);
  color: #fff;
  box-shadow: 0 24px 80px -16px rgba(212, 98, 59, 0.4);
}

/* fallback default */
.wg-gacha-card:not([data-section]) {
  background: linear-gradient(160deg, #1a1a2e 0%, #16213e 60%, #0f3460 100%);
  color: #fff;
  box-shadow: 0 24px 80px -16px rgba(0,0,0,0.5);
}

.wg-gacha-overlay.open .wg-gacha-card {
  transform: rotateY(0deg) scale(1);
}

/* sparkle overlay */
.wg-gacha-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(255,255,255,0.04) 0%, transparent 50%);
  pointer-events: none;
}

.wg-gacha-card .wg-card-badge {
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.85);
  margin: 0 auto 1rem;
  font-size: 0.7rem;
}

.wg-gacha-card .wg-card-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 400;
  color: #fff;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.wg-gacha-card .wg-card-desc {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
  opacity: 1;
  -webkit-line-clamp: unset;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.wg-gacha-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.wg-gacha-go {
  display: inline-block;
  padding: 0.55rem 1.8rem;
  border-radius: 8px;
  border: none;
  background: rgba(255,255,255,0.15);
  color: #fff !important;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none !important;
  transition: background 0.2s, transform 0.2s;
  backdrop-filter: blur(4px);
}

.wg-gacha-go:hover {
  background: rgba(255,255,255,0.25);
  transform: scale(1.04);
}

.wg-gacha-again {
  padding: 0.55rem 1.4rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.2);
  background: transparent;
  color: rgba(255,255,255,0.7);
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.wg-gacha-again:hover {
  border-color: rgba(255,255,255,0.4);
  color: #fff;
}

.wg-gacha-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 32px;
  height: 32px;
  border: none;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.5);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background 0.2s;
}

.wg-gacha-close:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

/* ── Back-to-wiki button on subpages ─────────────────────────── */
.wg-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--wg-concept) !important;
  text-decoration: none !important;
  padding: 0.4rem 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--wg-concept-soft);
  background: var(--wg-concept-soft);
  margin-bottom: 1.2rem;
  transition: background 0.2s, border-color 0.2s;
}

.wg-back-btn:hover {
  background: var(--wg-concept);
  border-color: var(--wg-concept);
  color: #fff !important;
}

/* ── Infinite scroll counter ─────────────────────────────────── */
.wg-load-counter {
  text-align: center;
  padding: 1rem 0;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--md-default-fg-color--light);
  opacity: 0.5;
}

.wg-sentinel {
  height: 1px;
}

/* ── responsive ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .wg-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
  .wg-card.wg-lg,
  .wg-card.wg-featured {
    grid-column: span 2;
    grid-row: span 1;
  }
}

@media (max-width: 600px) {
  .wg-grid {
    grid-template-columns: 1fr;
  }
  .wg-card.wg-lg,
  .wg-card.wg-featured {
    grid-column: span 1;
    grid-row: span 1;
  }
  .wg-header h1 {
    font-size: 1.8rem;
  }
  .wg-card.wg-featured .wg-card-title {
    font-size: 1.3rem;
  }
}