/* reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

@font-face {
  font-family: 'Mountains-of-Christmas';
  src: url('/assets/fonts/MountainsofChristmas-Regular.ttf');
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: 'Mountains-of-Christmas';
  src: url('/assets/fonts/MountainsofChristmas-Bold.ttf');
  font-weight: bold;
  font-style: normal;
}

/* variables */
:root {
  --dark-green: #313c33;
  --light-green: #6a7045;
  --dark-red: #7e0f12;
  --light-red: #b71a3b;
  --off-white: rgb(248, 243, 243);
  --beige: #fdf1ec;
}

body {
  font-family: 'Mountains-of-Christmas';
  background-color: var(--beige);
  flex-direction: column;
  align-items: center;
  font-weight: bold;
  display: flex;
}

section {
  padding: 25px 50px;
  min-height: 100px;
  width: 100%;
  max-width: 800px;
}

.hidden {
  display: none !important;
}

h1,
h2 {
  text-align: center;
}

h2 {
  font-size: 2.5rem;
}

h1 {
  font-size: 3rem;
}

#header {
  text-transform: uppercase;
  color: var(--dark-green);
  justify-content: center;
  letter-spacing: 0.2rem;
  align-items: center;
  display: flex;
}

#result {
  justify-content: space-between;
  align-items: center;
  display: flex;
}

#result span {
  border-bottom: 1px solid var(--dark-green);
  color: var(--dark-green);
  justify-content: center;
  align-items: center;
  font-size: 1rem;
  display: flex;
  height: 32px;
  width: 16px;
}

#result span.extra-space {
  margin-right: 20px;
}

#game {
  grid-template-columns: 1fr 1fr 1fr 1fr;
  display: grid;
  gap: 10px;
}

@media only screen and (min-width: 600px) {
  #game {
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr;
  }

  #result span {
    font-size: 2rem;
    height: 45px;
    width: 32px;
  }
}

#complete {
  justify-content: center;
  flex-direction: column;
  align-items: center;
  display: flex;
}

.card {
  aspect-ratio: 1;
  color: var(--off-white);
  font-weight: bold;
  font-size: 2rem;
  perspective: 1000px;
}

.card-inner {
  border-radius: 5px;
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.8s, box-shadow 0.2s;
  transform-style: preserve-3d;
}

.card-inner:hover {
  box-shadow: 0 4px 5px 0 rgb(0 0 0 / 14%), 0 1px 10px 0 rgb(0 0 0 / 12%),
    0 2px 4px -1px rgb(0 0 0 / 30%);
}

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

.card-front,
.card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  /* Safari */
  backface-visibility: hidden;
  border-radius: 5px;
}

.card-front {
  background-color: var(--dark-red);
  color: var(--off-white);
}

.card-back {
  transform: rotateY(180deg);
  background-color: var(--dark-green);
  display: flex;
  justify-content: center;
  align-items: center;
}