/**
 * Diagonal drifting game-thumbnail background (brick stagger)
 */

.game-thumb-bg {
  --thumb-size: 88px;
  --thumb-gap: 7px;
  --plane-angle: 35deg;
  --plane-w: 100vw;
  --plane-h: 100vh;
  --thumb-bg-blur: 5px;
  --thumb-bg-brightness: 0.72;

  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  min-height: 100dvh;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.game-thumb-bg.is-ready {
  opacity: 1;
}

.game-thumb-bg__plane {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--plane-w);
  height: var(--plane-h);
  min-width: 0;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translate(-50%, -50%) rotate(var(--plane-angle));
  transform-origin: center center;
  filter: blur(var(--thumb-bg-blur)) brightness(var(--thumb-bg-brightness));
}

.game-thumb-bg__track {
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  flex-shrink: 0;
  will-change: transform;
}

.game-thumb-bg__block {
  display: flex;
  flex-direction: column;
  gap: var(--thumb-gap);
  padding-bottom: var(--thumb-gap);
  flex-shrink: 0;
}

.game-thumb-bg__row {
  display: flex;
  flex-direction: row;
  gap: var(--thumb-gap);
  flex-shrink: 0;
}

.game-thumb-bg__row.is-offset {
  padding-left: calc((var(--thumb-size) + var(--thumb-gap)) * 0.5);
}

.game-thumb-bg__tile {
  width: var(--thumb-size);
  height: var(--thumb-size);
  flex: 0 0 var(--thumb-size);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  overflow: hidden;
  background: rgba(14, 11, 24, 0.35);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
}

.game-thumb-bg__tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.82;
}

/* Very soft edge — keep grid visible across full viewport */
.game-thumb-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 130% 130% at 50% 50%,
    transparent 72%,
    rgba(12, 10, 20, 0.22) 100%
  );
  pointer-events: none;
}

body.home-crazy .site-body {
  position: relative;
  z-index: 1;
  background: transparent !important;
}

body.home-crazy .site-header {
  position: sticky;
  z-index: 100;
  background: rgba(12, 10, 20, 0.68) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.home-crazy .hub-main,
.home-crazy .hub-shell,
.home-crazy .page-content {
  background: transparent !important;
}

.home-crazy .hub-sidebar {
  background: rgba(10, 8, 18, 0.34) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.home-crazy .hub-welcome {
  background: linear-gradient(
    135deg,
    rgba(30, 24, 56, 0.65),
    rgba(18, 14, 32, 0.72)
  ) !important;
}

.home-crazy .home-main .game-section {
  background: transparent !important;
}

.home-crazy .home-main .game-section--alt,
.home-crazy .user-section,
.home-crazy .game-section--library {
  background: rgba(22, 18, 42, 0.28) !important;
}

/* Play page — thumb layer on top; keep body dark so gaps never flash white */
body.has-thumb-bg.play-page {
  background: var(--bg-deep);
}

body.has-thumb-bg.play-page .bg-glow {
  opacity: 0.4;
}

body.has-thumb-bg.play-page .site-body {
  position: relative;
  z-index: 1;
  background: transparent !important;
}

body.has-thumb-bg.play-page .page-content {
  background: transparent !important;
}

body.has-thumb-bg.play-page .play-header {
  background: rgba(12, 10, 20, 0.68) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

body.has-thumb-bg.play-page .play-sidebar,
body.has-thumb-bg.play-page .play-similar-mobile {
  background: rgba(14, 10, 26, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 14px;
  padding: 0.65rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

body.has-thumb-bg.play-page .play-layout {
  background: transparent;
}

body.has-thumb-bg.play-page .similar-card {
  background: rgba(22, 18, 42, 0.55);
}

body.has-thumb-bg.play-page .play-stage-shell {
  background: linear-gradient(
    180deg,
    rgba(30, 24, 56, 0.94),
    rgba(12, 10, 20, 0.97)
  );
}

@media (max-width: 768px) {
  .game-thumb-bg {
    --thumb-size: 64px;
    --thumb-gap: 5px;
    --thumb-bg-blur: 3px;
  }

  .game-thumb-bg__tile img {
    opacity: 0.75;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .game-thumb-bg {
    --thumb-size: 76px;
    --thumb-gap: 6px;
  }
}

@media (min-width: 1025px) {
  .game-thumb-bg {
    --thumb-size: 88px;
    --thumb-gap: 7px;
  }

  .game-thumb-bg__tile img {
    opacity: 0.92;
  }
}

@media (prefers-reduced-motion: reduce) {
  .game-thumb-bg__tile img {
    opacity: 0.42;
  }
}