*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: inherit;
}

html {
  box-sizing: border-box;
  font-size: 12px;
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, sans-serif;
  font-size: 1.25rem;
  line-height: 1.33;
}

section {
  display: flex;
  flex-direction: column;
  width: 100%;

  &:not(.intro) {
    height: 100vh;
  }

  &:not(:last-of-type) {
    margin-bottom: 1rem;
  }

  h2 {
    line-height: 1;
    text-align: center;

    @media (min-width: 901px) {
      font-size: 5vw;
    }

    @media (min-width: 701px) and (max-width: 900px) {
      font-size: 5rem;
    }

    @media (max-width: 700px) {
      font-size: 2rem;
    }

    span {
      opacity: 0.15;
    }
  }

  h3 {
    font-size: 5vw;
    line-height: 1;
    position: relative;
    text-align: right;

    &::after {
      width: 100%; height: 100%;
      bottom: 0; left: 0;

      content: "";
      position: absolute;
    }
  }

  a {
    transition: color 0.2s;
  }

  .info,
  .swatches {
    width: 100%; height: 50%;
  }

  .info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1rem;
    position: relative;

    p {
      top: 1rem; left: 1rem;
      letter-spacing: 0.05rem;
      position: absolute;
    }

    h3 {
      bottom: 1rem; right: 1rem;
      position: absolute;
    }
  }

  .swatches {
    display: flex;
    flex-direction: row;
    height: 50%;
    list-style-type: none;

    .swatch {
      display: flex;
      flex-direction: column;
      height: 100%;
      justify-content: end;
      position: relative;

      h3 {
        z-index: 1;
      }

      p {
        height: 100%;
        padding: 1.5rem 1rem;
        opacity: 0.5;
        position: absolute;
        writing-mode: vertical-rl;

        @media (min-width: 701px) {
          width: 100%;
        }

        &::after {
          width: 100%; height: 75%;
          bottom: 0; right: 0;

          content: "";
          position: absolute;
        }
      }
    }
  }

  &.intro {
    align-items: center;
    display: flex;
    flex-direction: column;
    height: 45vh;
    justify-content: center;

    h1 {
      cursor: pointer;
      font-size: 10rem;
      max-width: 280px;
      width: fit-content;
    }

    p {
      padding: 2rem;
      text-align: center;
    }

    .links {
      .link {
        border-radius: 5rem;
        padding: 0.5rem 1rem;
        text-decoration: none;
        transition: background-color 0.2s;

        &:not(:first-of-type) {
          margin-left: 0.25rem;
        }
      }
    }

    .palette {
      display: flex;
      flex-direction: row;
      width: 280px;

      a {
        width: calc(280px / 8); height: calc(280px / 8);
      }
    }
  }
}

.notify {
  width: 100%; height: 5rem;
  bottom: 0; left: 0;

  color: var(--uchu-yang);
  display: flex;
  flex-direction: column;
  font-size: 1.5rem;
  justify-content: center;
  padding: 0 1.25rem;
  position: fixed;
  transition: transform 0.2s;;
  user-select: none;

  &:not(.active) {
    transform: translateY(5rem);
    z-index: 0;
  }

  &.active {
    transform: translateY(0);
    z-index: 10;
  }
}

@keyframes loading {
  50% {
    color: var(--uchu-yang);
  }
}