@charset "UTF-8";

:root {
  --color-primary: #333333;
  --heading-size-level-1: 1.375rem;
  --heading-size-level-2: 1.125rem;
  --heading-size-level-3: 1rem;
  --heading-size-level-4: 0.875rem;
  --heading-size-level-5: 0.75rem;
  --heading-size-level-6: 0.625rem;

  --heading-size-level-1-sp: 1.25rem;
  --heading-size-level-2-sp: 1rem;
  --heading-size-level-3-sp: 0.875rem;
  --heading-size-level-4-sp: 0.75rem;
  --heading-size-level-5-sp: 0.625rem;
  --heading-size-level-6-sp: 0.5rem;

  --paragraph-size: 1rem;
  --paragraph-size-sp: 0.875rem;
  
}

body {
  font-size: var(--paragraph-size);
  line-height: 1.5;
  color: var(--color-primary);

  &::before {
    content: "";
    position: fixed;
    z-index: -1;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: solid 5px var(--color-primary);
  }
}

a {
  text-decoration: none;
  color: inherit;
}

li {
  list-style: none;
}



.c-header {
  max-width: 1080px;
  margin: 50px auto 0;
  border: solid 3px var(--color-primary);
  border-radius: 25px;
}

.c-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 46px;
}

.c-nav__heading {
  font-size: 14px;
  font-weight: bold;
}

.c-nav__list {
  display: flex;
  gap: 40px;
}

.c-nav__list li{
  font-size: 14px;
  font-weight: bold;
}

.c-nav__sns {
  display: flex;
  gap: 10px;
}


@media screen and (max-width: 768px) {
  body {
    font-size: var(--paragraph-size-sp);
  }

  .c-header {
    margin: 30px auto 0;
    border: solid 2px var(--color-primary);
    border-radius: 15px;
  }

  .c-nav {
    padding: 0 20px;
  }

  .c-nav__heading {
    font-size: 12px;
  }

  .c-nav__list {
    gap: 20px;
  }

  .c-nav__list li {
    font-size: 12px;
  }
}