:root {
  --font-family: 'Montserrat', sans-serif;
  --primary-color: deeppink;
  --grid: 8;
  --base: 8px;
}

body {
  font-family: var(--font-family);
  background:
    linear-gradient(115.58deg, #00FC19 0%, #1700A4 100.22%),
    radial-gradient(92.72% 100% at 50% 0%, #EBFFCB 0%, #651200 100%),
    radial-gradient(92.72% 100% at 50% 0%, #FAFF00 0%, #820000 100%),
    radial-gradient(109.21% 213.32% at 100% 0%, #FF4D00 0%, #00C2FF 100%),
    linear-gradient(127.43deg, #D50000 0%, #7856FF 100%) no-repeat;
  background-blend-mode: lighten, overlay, lighten, screen, normal;
  height: 100vh;
  font-size: 16px;
  margin: 0 32px;
}

h1, h2 {
  color: var(--primary-color);
  text-align: center;
}

.layout-wrapper {
  height: 100vh;
  max-width: 800px;
  width: 100%;
  display: flex;
  flex-direction: column;
}

.layout {
  display: flex;
  flex-direction: column;
  justify-content: start;
  align-items: center;
}

.header {
  background: white;
  padding: 16px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .1);
  display: flex;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
  margin: 4rem 0;
}

@media screen and (max-height: 996px) {
  .header {
    border-radius: 0 0 8px 8px;
    margin: 0 0 16px;
  }
}

.header .time {
  display: flex;
  align-items: center;
  min-width: 80px;
}

.header .steps {
  min-width: 80px;
}

.header .time .icon {
  fill: #999;
  margin: 0 8px;
}

.header-item {
  font-weight: 500;
  color: #666;
  margin: 0 16px;
}

.replay {
  color: #666;
  background: none;
  font-family: var(--font-family);
  border: 0;
  padding: 8px 16px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  font-size: 16px;
  font-weight: 500;
  margin: 0 auto 0 0;
  white-space: nowrap;
}

.replay:hover {
  color: var(--primary-color);
  background: rgba(255, 20, 147, 0.1);
}

.replay:active {
  color: #b40c67;
}

.replay:hover .replay-icon,
.replay:focus .replay-icon {
  fill: var(--primary-color);
}

.replay-icon {
  color: #999;
  opacity: .6;
  margin: 0 8px 0 0;
}

.board-wrapper {
  flex-direction: column;
  flex: 1 0 auto;
  min-height: 0;
  display: flex;
  margin: 0 0 32px;
  position: relative;
  align-items: center;
}

.board {
  display: grid;
  grid-gap: min(1vh, 1vw);
  grid-template-columns: repeat(var(--grid), 1fr);
  grid-template-rows: repeat(var(--grid), 1fr);
  background: #ae7c73;
  padding: 1vh;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .3);
  box-sizing: border-box;
  position: absolute;
  width: 100%;
}

@media screen and (max-height: 996px) {
  .board {
    height: 100%;
    width: auto;
  }
}

@media (aspect-ratio: 1/1), (aspect-ratio: 1/2), (orientation: portrait) {
  .board {
    height: auto;
    width: 100%;
  }
}

.card {
  border: 0;
  background: none;
  padding: 0;
  margin: 0;
  aspect-ratio: 1;
  font-size: 64px;
  min-width: 20px;
  min-height: 20px;
  perspective: 1000px;
  cursor: pointer;
}

@media screen and (max-height: 600px) {
  .card {
    font-size: 48px;
  }
}

.card:focus {
  box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
}

.card.found {
  transition: transform .2s ease;
  transform: scale(1.2);
}

.card.already-found {
  visibility: hidden;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.3s;
  transform-style: preserve-3d;
}

.card.turned .card-inner {
  transform: rotateY(180deg);
}

.card-front,
.card-back {
  backface-visibility: hidden;
  position: absolute;
  width: 100%;
  height: 100%;
}

.card-front {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: white;
  transform: rotateY(180deg);
  box-shadow: 0 4px 8px rgba(0, 0, 0, .2);
}

.card-back {
  background-color: hsl(34, 53%, 82%);
  background-image:
    repeating-linear-gradient(
      45deg,
      transparent 2.5%,
      hsla(197, 62%, 11%, 0.5) 2.5%,
      hsla(197, 62%, 11%, 0.5) 5%,
      hsla(5, 53%, 63%, 0) 5%,
      hsla(5, 53%, 63%, 0) 17.5%,
      hsla(5, 53%, 63%, 0.5) 17.5%,
      hsla(5, 53%, 63%, 0.5) 20%,
      hsla(197, 62%, 11%, 0.5) 20%,
      hsla(197, 62%, 11%, 0.5) 25%,
      hsla(197, 62%, 11%, 0) 25%,
      hsla(197, 62%, 11%, 0) 30%,
      hsla(5, 53%, 63%, 0.5) 30%,
      hsla(5, 53%, 63%, 0.5) 35%,
      hsla(35, 91%, 65%, 0.5) 35%,
      hsla(35, 91%, 65%, 0.5) 40%,
      hsla(35, 91%, 65%, 0) 40%,
      hsla(35, 91%, 65%, 0) 45%,
      hsla(5, 53%, 63%, 0.5) 45%,
      hsla(5, 53%, 63%, 0.5) 55%,
      hsla(5, 53%, 63%, 0) 55%,
      hsla(5, 53%, 63%, 0) 60%,
      hsla(197, 62%, 11%, 0.5) 60%,
      hsla(197, 62%, 11%, 0.5) 70%
    ),
    repeating-linear-gradient(
      135deg,
      transparent 2.5%,
      hsla(197, 62%, 11%, 0.5) 2.5%,
      hsla(197, 62%, 11%, 0.5) 5%,
      hsla(5, 53%, 63%, 0) 5%,
      hsla(5, 53%, 63%, 0) 17.5%,
      hsla(5, 53%, 63%, 0.5) 17.5%,
      hsla(5, 53%, 63%, 0.5) 20%,
      hsla(197, 62%, 11%, 0.5) 20%,
      hsla(197, 62%, 11%, 0.5) 25%,
      hsla(197, 62%, 11%, 0) 25%,
      hsla(197, 62%, 11%, 0) 30%,
      hsla(5, 53%, 63%, 0.5) 30%,
      hsla(5, 53%, 63%, 0.5) 35%,
      hsla(35, 91%, 65%, 0.5) 35%,
      hsla(35, 91%, 65%, 0.5) 40%,
      hsla(35, 91%, 65%, 0) 40%,
      hsla(35, 91%, 65%, 0) 45%,
      hsla(5, 53%, 63%, 0.5) 45%,
      hsla(5, 53%, 63%, 0.5) 55%,
      hsla(5, 53%, 63%, 0) 55%,
      hsla(5, 53%, 63%, 0) 70%,
      hsla(197, 62%, 11%, 0.5) 70%,
      hsla(197, 62%, 11%, 0.5) 80%
    );
  box-shadow: 0 4px 8px rgba(0, 0, 0, .2);
  background-size: cover;
}

.win {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: rgba(0, 0, 0, .2);
  justify-content: center;
  align-items: center;
  display: flex;
  transition: opacity .3s ease, visibility .3s ease;
  visibility: hidden;
  opacity: 0;
}

.win.open {
  opacity: 1;
  visibility: visible;
}

.win.open .box {
  transform: scale(1) translateY(0);
}

.win .box {
  border-radius: 20px;
  padding: 30px;
  background: white;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .34);
  position: relative;
  transform: scale(.5) translateY(20px);
  transition: transform .3s cubic-bezier(0.25, 0.1, 0.3, 1.5);
}

.win .trophy {
  position: absolute;
  top: -48px;
  left: 50%;
  transform: translateX(-50%);
  margin: 0 auto;
  font-size: 64px;
  width: 72px;
  height: 72px;
  border-radius: 20px;
  padding: 12px;
  text-align: center;
  background: rgba(223, 230, 234, 0.9);
  box-shadow: 0 4px 18px rgba(0, 0, 0, .1);
}

.win button {
  font-family: var(--font-family);
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  margin: 20px auto 0;
  background: none;
  display: block;
  padding: 8px 16px;
  font-size: 16px;
  border-radius: 8px;
  min-width: 200px;
}

.win h2 {
  margin: 48px 0 0;
}

.win button:hover {
  background: var(--primary-color);
  color: white;
}