html {
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

@font-face {
  font-family: "MBDemonicTale";
  src: local(MBDemonicTale),
    url(../fonts/MBDemonicTale.woff2) format("woff2"),
    url(../fonts/MBDemonicTale.woff) format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "FortunaGothicFlorishC";
  src: local(FortunaGothicFlorishC),
    url(../fonts/FortunaGothicFlorishC.woff2) format("woff2"),
    url(../fonts/FortunaGothicFlorishC.woff) format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

body {
  font-family: "FortunaGothicFlorishC", sans-serif;
}

.container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  max-width: 1440px;
  height: 865px;
  padding: 20px 50px;
  background-image: url(../image.png);
  background-color: rgb(173, 171, 171);
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

.container::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
  background-image: linear-gradient(90deg, black -60%, transparent 120%);
}

.timer,
.card,
.btn {
  position: relative;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 3;
}

.timer {
  width: 80px;
  height: 80px;
  margin-left: auto;
  padding: 10px;
  text-align: center;
  font-size: 50px;
  color: black;
  border: 1px solid black;
  border-radius: 10px;
  box-shadow: 1px 1px 0 black;
  background-image: radial-gradient(#ff0000, black);
}

.game {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  max-width: 1000px;
  margin: 0;
  padding: 0;
}

.card {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 150px;
  width: 150px;
  padding: 20px;
  background-image: linear-gradient(#faeb2c, #ff0000 45%, black 95%);
  font-family: "MBDemonicTale";
  font-size: 0;
  color: transparent;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 3px 3px 0 black;
  transition: background-image 0.3s ease-in-out;
}

.card:hover {
  background-image: linear-gradient(#faeb2c, black);
}

.card:active {
  background-image: linear-gradient(#ff0000, black);
}

.open {
  font-size: 80px;
  color: black;
  background-image: radial-gradient(#ff0000, black);
  cursor: default;
}

.open:hover {
  background-image: radial-gradient(#ff0000, black);
}

.open:active {
  background-image: radial-gradient(#ff0000, black);
}

.success {
  font-size: 100px;
  color: black;
  cursor: default;
  background-image: radial-gradient(#74ee15, black);
  cursor: default;
}

.success:hover {
  background-image: radial-gradient(#74ee15, black);
}

.success:active {
  background-image: radial-gradient(#74ee15, black);
}

.btn {
  max-width: 280px;
  min-height: 80px;
  padding: 10px;
  text-align: center;
  font-size: 30px;
  color: black;
  cursor: pointer;
  border: none;
  border-radius: 10px;
  outline: none;
  background-image: radial-gradient(#faeb2c, #ff0000, black);
  box-shadow: 1px 1px 0 black;
  transition: background-image 0.3s ease-in-out;
}

.btn:hover {
  background-image: radial-gradient(#faeb2c, black);
}

.btn:active {
  background-image: radial-gradient(#74ee15, black);
}

@media(max-width: 630px) {
  .container {
    gap: 10px;
    padding: 15px;
  }

  .timer {
    width: 50px;
    height: 50px;
    padding: 5px;
    font-size: 35px;
  }

  .game {
    gap: 5px;
  }

  .card {
    padding: 10px;
  }

  .open {
    font-size: 40px;
  }

  .success {
    font-size: 50px;
  }

  .btn {
    max-width: 250px;
    padding: 5px 10px;
    font-size: 25px;
  }
}