styles.scss

* {
  box-sizing: border-box;
  --clr-text: #bdbddd;
  --clr-bg-secondary: #cdcdff;
  --clr-bg: #030317;
}

@mixin font-family {
  font-family: "Waiting for the Sunrise", cursive;
  font-weight: 400;
  font-style: normal;
  font-size: 24px;
}

body {
  height: 98vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--clr-bg);
  color: var(--clr-text);
  @include font-family();

  h2 {
    margin-top: 0;
    margin-bottom: 8px;
  }
}

.center {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.game-wrapper {
  position: relative;
  margin-bottom: 5rem;

  &.started #game-grid {
    display: grid;
  }

  &.started .scores {
    display: flex;
  }

  &.started .hint {
    display: block;
  }

  &.started #reset {
    display: block;
  }

  #game-grid {
    display: none;
    grid-template-columns: repeat(10, 50px);
    grid-template-rows: repeat(10, 50px);
    justify-items: center;
    align-items: center;

    .dot {
      width: 48px;
      height: 48px;
      border-radius: 50%; 
      border: 2px var(--clr-bg) solid;

      &.selected {
        border: 2px var(--clr-text) solid;
      }

      &[data-color="yellow"] {
        background-color: #f9d923;
      }

      &[data-color="green"] {
        background-color: #36ae7c;
      }

      &[data-color="blue"] {
        background-color: #187498;
      }

      &[data-color="red"] {
        background-color: #eb5353;
      }
    }
  }

  .scores {
    margin-top: 1em;
    display: none;
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
    > * {
      padding-bottom: 2px;
      position: relative;
    }

    :first-child.turn::after {
      content: "🤔";
      position: absolute;
      right: -35px;
    }
    :last-child.turn::after {
      content: "🤔";
      position: absolute;
      left: -35px;
    }
  }

  #reset {
    display: none;
    background-color: transparent;
    border: none;
    position: absolute;
    right: 0;
    top: -48px;
    opacity: 0.3;
    cursor: pointer;
  }

  .hint {
    display: none;
    text-align: center;
  }

  .btn {
    display: inline-block;
    color: var(--clr-text);
    margin: 6px;
    line-height: 1.42;
    padding: 0.6em 1.6em;
    border: 2px solid;
    background: transparent;
    border-radius: 1.46em;
    cursor: pointer;
    user-select: none;
    position: relative;
    overflow: hidden;
    transition: background-color 0.3s, color 0.3s;
    margin-top: 32px;
    @include font-family();

    &:hover:after {
      transform: scaleX(1);
      opacity: 1;
      transition: transform 0.3s, opacity 0.3s;
    }

    &:after {
      content: "";
      display: block;
      position: absolute;
      top: 0;
      left: 0;
      height: 100%;
      width: 100%;
      z-index: -1;
      border-radius: 1.46em;
      transform: scaleX(0.7);
      opacity: 0;
      transition: transform 0.8s, opacity 0.3s;
    }
  }
  .btn-dark {
    color: var(--clr-text);
    border-color: var(--clr-text);
    &:hover {
      color: var(--clr-bg);
      background-color: var(--clr-bg-secondary);
    }
    &:active {
      background-color: var(--clr-text);
      &:after {
        background-color: var(--clr-text);
      }
    }
    &:after {
      background-color: var(--clr-bg-secondary);
    }
  }

  .game-mode {
    display: none;
    margin: 6px;
    margin-top: 32px;
    width: 300px;
    cursor: pointer;
  }

  .game-mode-option {
    flex: 1;
    text-align: center;
    padding: 12px;
    background-color: transparent;
    line-height: 1.42;
    margin: 0;
    border: 2px solid #3f4351;
  }

  .game-mode-option:first-child {
    border-start-start-radius: 40px;
    border-end-start-radius: 40px;

    border-start-end-radius: 0px;
    border-end-end-radius: 0px;
  }

  .game-mode-option:nth-child(2) {
    border-left: 0px;
    border-start-start-radius: 0px;
    border-end-start-radius: 0px;

    border-start-end-radius: 40px;
    border-end-end-radius: 40px;
  }
}