:root {
  color-scheme: dark;
  --ink: oklch(96% 0.01 292);
  --cyan: oklch(83% 0.18 202);
  --violet: oklch(75% 0.2 306);
  --rose: oklch(76% 0.18 18);
  --gold: oklch(84% 0.16 84);
  --good: oklch(81% 0.17 150);
  --bad: oklch(70% 0.2 24);
  --night: oklch(8% 0.035 285);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
  background:
    radial-gradient(circle at 50% 18%, oklch(34% 0.11 296 / 0.42), transparent 28rem),
    linear-gradient(180deg, oklch(12% 0.045 278), var(--night));
  color: var(--ink);
}

body {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
  overflow: hidden;
}

button {
  font: inherit;
}

.phone-game {
  width: min(calc(100vw - 24px), calc((100svh - 24px) * 1.742), 864px);
  aspect-ratio: 864 / 496;
  max-height: calc(100svh - 24px);
  display: grid;
  place-items: center;
}

.stage {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: clamp(18px, 4vw, 34px);
  background: var(--night);
  box-shadow:
    0 28px 90px oklch(4% 0.03 285 / 0.7),
    0 0 0 1px oklch(82% 0.13 300 / 0.18),
    inset 0 0 0 1px oklch(100% 0.01 292 / 0.14);
  isolation: isolate;
}

.story-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--night);
  z-index: 0;
}

.video-shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 42%, transparent 0 42%, oklch(4% 0.02 285 / 0.24) 100%),
    linear-gradient(180deg, oklch(4% 0.02 285 / 0.18), transparent 24%, oklch(4% 0.02 285 / 0.2));
}

.links,
.items-layer,
.burst-layer {
  position: absolute;
  inset: 0;
}

.links {
  z-index: 2;
  overflow: visible;
}

.memory-line {
  stroke: oklch(84% 0.18 306 / 0.72);
  stroke-width: 0.72;
  stroke-linecap: round;
  filter: drop-shadow(0 0 0.55px oklch(94% 0.12 306)) drop-shadow(0 0 1.9px oklch(76% 0.18 306));
  animation: linkDraw 620ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.memory-line.wrong {
  stroke: var(--bad);
  animation: wrongDraw 420ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.memory-line.complete {
  opacity: 0;
  transition: opacity 420ms ease;
}

.items-layer {
  z-index: 3;
}

.memory-item {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: calc(var(--item-size) * 0.5);
  height: calc(var(--item-size) * 0.5);
  translate: -50% -50%;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
  filter: none;
  isolation: isolate;
  transition:
    transform 190ms cubic-bezier(0.16, 1, 0.3, 1),
    opacity 260ms ease,
    filter 190ms ease;
  -webkit-tap-highlight-color: transparent;
}

.memory-item::before {
  content: none;
}

.memory-item img {
  position: relative;
  z-index: 1;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
}

.memory-item:hover,
.memory-item:focus-visible,
.memory-item.selected {
  outline: none;
  transform: scale(1.1);
  filter: none;
}

.memory-item:hover::before,
.memory-item:focus-visible::before,
.memory-item.selected::before {
  opacity: 1;
  transform: scale(1.18);
}

.memory-item.matched {
  pointer-events: none;
  opacity: 0;
  transform: scale(0.58);
  filter: none;
}

.memory-item.matched::before {
  opacity: 0;
}

.memory-item.wrong {
  animation: reject 340ms ease;
}

.memory-item.locked {
  pointer-events: none;
}

.burst-layer {
  z-index: 4;
  pointer-events: none;
}

.spark {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--gold);
  box-shadow: 0 0 16px var(--gold);
  animation: spark 760ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@keyframes linkDraw {
  from {
    stroke-dasharray: 140;
    stroke-dashoffset: 140;
    opacity: 0;
  }
  to {
    stroke-dasharray: 140;
    stroke-dashoffset: 0;
    opacity: 1;
  }
}

@keyframes wrongDraw {
  from {
    opacity: 0.9;
  }
  to {
    opacity: 0;
  }
}

@keyframes reject {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-7px);
  }
  75% {
    transform: translateX(7px);
  }
}

@keyframes spark {
  from {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(var(--angle)) translateX(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(var(--angle)) translateX(var(--distance)) scale(0.2);
  }
}

@media (max-height: 680px) {
  .memory-item {
    width: calc(var(--item-size) * 0.5);
    height: calc(var(--item-size) * 0.5);
  }
}

@media (orientation: portrait) {
  .phone-game {
    width: min(calc(100vw - 24px), 960px);
  }
}