/* Procedural covers — pure CSS, no assets. */

/* OmniCrawl: dungeon grid lit by a torch */
.cover-crawl {
  background: #0b0716;
}

.crawl-grid {
  position: absolute;
  inset: -40% -10%;
  background-image:
    linear-gradient(rgba(139, 108, 240, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 108, 240, 0.16) 1px, transparent 1px);
  background-size: 44px 44px;
  transform: perspective(420px) rotateX(55deg);
  transform-origin: 50% 100%;
}

.crawl-torch {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(38% 55% at 50% 46%, rgba(255, 176, 92, 0.4), transparent 70%),
    radial-gradient(70% 90% at 50% 48%, rgba(139, 108, 240, 0.2), transparent 75%);
}

.crawl-arch {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -52%);
  width: clamp(110px, 20vw, 170px);
  height: auto;
  mix-blend-mode: screen;
  -webkit-mask-image: radial-gradient(closest-side, #000 58%, transparent 82%);
  mask-image: radial-gradient(closest-side, #000 58%, transparent 82%);
  filter: drop-shadow(0 6px 24px rgba(255, 176, 92, 0.35));
}

/* DEEP-9: raycaster corridor on a green CRT */
.cover-deep9 {
  background: #04120a;
}

.d9-corridor {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(45deg, transparent 46%, rgba(84, 240, 150, 0.5) 46.6%, transparent 47.2%) 0 0 / 100% 100%,
    linear-gradient(-45deg, transparent 46%, rgba(84, 240, 150, 0.5) 46.6%, transparent 47.2%) 0 0 / 100% 100%,
    linear-gradient(135deg, transparent 46%, rgba(84, 240, 150, 0.35) 46.6%, transparent 47.2%) 0 0 / 100% 100%,
    linear-gradient(-135deg, transparent 46%, rgba(84, 240, 150, 0.35) 46.6%, transparent 47.2%) 0 0 / 100% 100%,
    radial-gradient(30% 40% at 50% 50%, rgba(84, 240, 150, 0.25), transparent 70%);
}

.d9-scan {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.25) 0 2px,
    transparent 2px 4px
  );
}

/* SKY-8: sunset flight */
.cover-sky8 {
  background: linear-gradient(#1a2c68 0%, #4f3a8c 45%, #c25a7c 70%, #e08a5a 100%);
}

.sky-sun {
  position: absolute;
  left: 50%;
  top: 46%;
  width: 74px;
  height: 74px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #ffd98a;
  box-shadow: 0 0 44px rgba(255, 217, 138, 0.75);
}

.sky-sea {
  position: absolute;
  inset: 72% 0 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(20, 30, 80, 0.85) 0 3px,
    rgba(80, 60, 130, 0.5) 3px 6px
  );
}

.sky-plane {
  position: absolute;
  left: 34%;
  top: 58%;
  width: 0;
  height: 0;
  border-left: 14px solid transparent;
  border-right: 14px solid transparent;
  border-bottom: 22px solid #101830;
  transform: rotate(90deg);
  filter: drop-shadow(0 0 6px rgba(0, 0, 0, 0.5));
}

.sky-ring {
  position: absolute;
  border: 3px solid rgba(120, 240, 220, 0.8);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(120, 240, 220, 0.5);
}

.sky-ring.r1 {
  left: 62%;
  top: 30%;
  width: 34px;
  height: 46px;
}

.sky-ring.r2 {
  left: 78%;
  top: 48%;
  width: 22px;
  height: 30px;
}

/* Rocket-Pup: warm sky, rocket arc, bone */
.cover-pup {
  background: linear-gradient(#7ec3e8 0%, #b7ddf2 60%, #f2d8a0 100%);
}

.pup-trail {
  position: absolute;
  left: -6%;
  bottom: 8%;
  width: 80%;
  height: 60%;
  border-top: 5px dashed rgba(255, 255, 255, 0.85);
  border-radius: 50% 40% 0 0 / 90% 70% 0 0;
  transform: rotate(-6deg);
}

.pup-rocket {
  position: absolute;
  left: 62%;
  top: 26%;
  width: 34px;
  height: 20px;
  background: #e2574c;
  border-radius: 10px 14px 14px 10px;
  transform: rotate(-18deg);
  box-shadow: -14px 6px 0 -6px rgba(255, 176, 92, 0.9);
}

.pup-bone {
  position: absolute;
  left: 80%;
  top: 62%;
  font-size: 22px;
  transform: rotate(24deg);
}

/* Speck: one bright pixel in the dark */
.cover-speck {
  background: #05050a;
}

.speck-stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 18% 30%, rgba(255, 255, 255, 0.5), transparent 100%),
    radial-gradient(1px 1px at 66% 18%, rgba(255, 255, 255, 0.35), transparent 100%),
    radial-gradient(1px 1px at 82% 66%, rgba(255, 255, 255, 0.4), transparent 100%),
    radial-gradient(1px 1px at 34% 74%, rgba(255, 255, 255, 0.3), transparent 100%),
    radial-gradient(1px 1px at 52% 44%, rgba(255, 255, 255, 0.25), transparent 100%);
}

.speck-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 6px;
  height: 6px;
  transform: translate(-50%, -50%);
  background: #fff;
  box-shadow:
    0 0 10px #fff,
    0 0 30px rgba(140, 200, 255, 0.9);
}