* {
  box-sizing: border-box;
}

:root {
  background: #111827;
  background: #1e293b;
  color: #d1d5db;
  font-family: system-ui;
}

body, html {
  padding: 0;
  margin: 0;
}

.logo {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 100;
  display: flex;
  width: 32px;
  height: 32px;
  opacity: 0.7;
  transition: opacity 0.15s;
}

.logo:hover {
  opacity: 1;
}

.logo img {
  width: 100%;
  height: 100%;
}

main {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem 1rem;
}

.game-options {
  display: flex;
  gap: 4rem;
}

button {
  font: inherit;
  color: inherit;
  border: none;
  background: transparent;
  display: inline-flex;
  gap: 0.5rem;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  transition: background 0.15s;
}

button:hover {
  background: #0f172a;
  background: #334155;
  filter: brightness(125%);
  box-shadow: 0.25rem 0.25rem 0.5rem #020617;
}

button:active {
  background: #0f172a;
}

.win .moves {
  color: #4ade80;
}

.win .next-level {
  background: #065f46;
  color: #a7f3d0;
}

.error .moves {
  color: #f87171;
}

.error .start-over {
  background: #991b1b;
  color: #fecaca;
}

game-board {
  --size: 4;
  font-family: "Noto Color Emoji", system-ui, sans-serif;
  display: grid;
  grid-template-columns: repeat(var(--size), minmax(0, 1fr));
  gap: 1rem;
  width: calc(100% - 2rem);
  max-width: 36rem;
  user-select: none;
}

game-tile {
  font-size: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  aspect-ratio: 1/1;
  border-radius: 0.5rem;
  transition: transform 0.5s, background 0.25s, box-shadow 0.25s;
  background: #475569;
  box-shadow:
    inset -1px 1px 1px rgba(255 255 255 / 0.2),
    -0.25rem 0.25rem 0.5rem rgba(0 0 0 / 0.5);
}

game-tile.flipped {
  transform: rotateY(-180deg);
  transform-style: preserve-3d;
  background: #030712;
  box-shadow: inset 1px 1px 1px #475569;
}

.error game-tile.flipped {
  background: #7f1d1d;
}

game-tile span {
  opacity: 0;
  transition: opacity 0.15s;
}

game-tile.match span,
game-tile.flipped span {
  opacity: 1;
  transition: opacity 0.75s;
}

@keyframes flashmatch {
  0% {
    background: #0284c7;
    box-shadow: 0 0 1rem #38bdf8,
      inset 0 0 4rem #38bdf8,
      inset 0 0 0 2px #fff
    ;
  }
  5% {
    transform: scale(1.2);
  }
  15% {
    transform: scale(1);
  }
  75%{
    background: #0284c7;
    box-shadow: 0 0 1rem #38bdf8,
      inset 0 0 4rem #38bdf8,
      inset 0 0 0 2px #fff
    ;
    opacity: 1;
  }
  100%{ 
    background: #0284c7;
    box-shadow: none;
    opacity: 0;
  }
}

game-tile.match {
  animation: flashmatch 5s forwards;
}

game-tile:not(.flipped):hover {
  background: #1e293b;
  box-shadow:
    inset 1px 1px 1px #475569,
    inset -0.15rem 0.15rem 2rem #020617,
    inset 0 0 8px #020617,
    0.25rem 0.25rem 0.5rem rgba(0 0 0 / 0.5);
}

game-tile.flipped:hover {
  filter: brightness(115%);
}

@keyframes modal-in {
  0% {
    opacity: 0;
  }
  5% {
    opacity: 0.5;
    transform: scale(1.2);
  }
  15% {
    opacity: 1;
    transform: scale(1);
  }
  25%, 100% {
    background: #0f172a;
  }
}


game-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: modal-in 3s forwards;
}

game-modalbody {
  background: #22c55e;
  background: transparent;
  color: #fff;
  text-align: center;
  padding: 2rem;
  border-radius: 1rem;
}

game-modalbody h2 {
  position: relative;
  font-size: 8rem;
  margin: 0 0 2rem;
  text-align: center;
  filter: drop-shadow(0 0 4rem #ffaadd);
}

game-modalbody p {
  font-size: 2rem;
}

game-modalbody button,
game-modalbody button:hover {
  background: #db2777;
}
game-modalbody button:hover {
  filter: brightness(125%);
}

game-modal footer {
  display: flex;
  justify-content: center;
}
score-board {
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

final-score {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
}

.game-header {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.players {
  display: flex;
  gap: 2rem;
}

.player {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  position: relative;
  text-align: center;
  border-radius: 0.5rem;
  padding: 0.5rem 1rem;
  border: 2px solid #475569;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.player.current {
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.4);
}

.name-wrapper {
  display: flex;
  flex-grow: 1;
  align-items: center;
}

.autosize {
  display: inline-block;
  position: relative;
  flex-grow: 1;
}

.autosize pre,
.autosize input {
  min-width: 2rem;
  min-height: 2.5rem;
  border: none;
  background: transparent;
  font: inherit;
  color: inherit;
  text-align: left;
  border-radius: 0.25rem;
  padding: 0.5rem;
  margin: 0;
}

.autosize pre {
  color: transparent;
}
.autosize input {
  width: 100%;
}

.player .name {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.player .name:focus {
  background: rgba(0 0 0 / 0.25);
  outline: none;
}

@media (max-width: 600px) {
  body {
    touch-action: pan-x pan-y;
  }

  .add-player {
    display: none;
  }

  game-board {
    gap: 0.5rem;
  }

  game-tile {
    font-size: 2.5rem;
  }
}