html {
  font-size: 62.5%;
}
body {
font-size: 1.6rem;
color: #191919;
background: #f3f3f3;
}

/* ========== ========== ========== ========== ========== */
img {
  max-width: 100%;
  height: auto;
}

a:link,
a:visited {
  color: #0d6efd;
  text-decoration: none;
  transition: all .2s;
}

a:hover {
  color: #7b13f8;
  text-decoration: none;
  opacity: 0.84;
}

a:link img,
a:visited img {
  opacity: 1;
  transition: all .2s;
}

a img:hover {
  opacity: 0.92;
}
/* ========== ========== ========== ========== ========== */
h1,
h2,
h3,
h4,
h5 {
  font-feature-settings: "palt";
  letter-spacing: 0.04em;
  line-height: 1.2;
  margin: 0;
  padding: 0 0 6px;

}

h1,
h2,
h3 {
  font-size: clamp(2.1rem, 2.1vw, 2.4rem);
}

h2 {
  margin-bottom: 24px;
}


h4,
h5 {
  font-size: 1.3rem;
  color: #b3b3b3;
  font-weight: 400;
}

h1 span,
h2 span,
h3 span,
h4 span,
h5 span {
  font-weight: 400;
  font-size: clamp(1.5rem, 1.8vw, 2.4rem);
  letter-spacing: 0;
  display: block;
}

p  {
  font-size: clamp(1.5rem, 2.1vw, 3.0rem);
  line-height: 1.5;
  padding: 0 0 12px;
  margin: 0;
  text-align: justify;
}

/* ****** ****** ****** ****** ****** ****** */

body {
  /* background-image: url('../images/24px.png');
  background-repeat: repeat; */
  text-align: center;

  /* display: grid;
  grid-gap: 12px;
  grid-template-columns: 1fr; */
}

/* @media (min-width: 600px) {
  body {
    grid-template-columns: 300px 1fr;
  }
} */

/* header {
  z-index: 1000;
  position: fixed;
  background: #f3f3f3;
  width: 100%;
  height: 72px;
}

header nav ul {
  list-style: none;
  margin: 0 auto;
  padding: 12px 0 0;
  text-align: center;
  font-weight: bold;
}

header nav ul li {
  display: inline-block;
  margin: 24px;
}

@media (min-width: 600px) {
  header {
    width: 300px;
    height: auto;
  }
  header nav ul {
    margin: 0;
    text-align: left;
  }
  header nav ul li {
    display: block;
  }
} */



/* main {
  display: block;
  width: clamp(280px, 90vw, 800px);
  margin: 0 auto;
  padding: 24px 0 0;
} */

main {
  width: clamp(300px, 90vw, 800px);
  display: grid;
  grid-gap: 12px;
  grid-template-columns: 1fr;

  margin: 0 auto;
}

@media (min-width: 600px) {
  main {
    grid-template-columns: 200px 1fr;
  }
}

nav {
  z-index: 1000;
  position: fixed;
  background: #f3f3f3;
  padding: 12px;
}

nav ul {
  list-style: none;
  margin: 0 auto;
  padding: 12px 0 0;
}

nav ul li {
  display: inline-block;
}


@media (min-width: 600px) {
  nav {
    width: 200px;
    height: auto;
  }
  nav ul {
    margin: 0;
    text-align: left;
  }
  nav ul li {
    display: block;
  }
}


/*  */
.Wrapper {
  /* width: clamp(280px, 90vw, 800px); */
  text-align: left;
  margin: 0 auto;
  padding: 24px 0 0;
  border-top: #808080 2px solid;
}

/* ****** ****** ****** ****** ****** ****** */

/* font family: Sub Set */
#font-family h3 {
  margin: 48px 0 24px;
  padding: 6px 0 0;
  border-top: 2px solid #ddd;
}

.IBMPlexSansJP    { font-family: "IBMPlexSansJP";}
.NotoSansJP       { font-family: "NotoSansJP";}
.NotoSerifJP      { font-family: "NotoSerifJP";}
.SawarabiGothic   { font-family: "SawarabiGothic";}
.ShipporiMinchoB1 { font-family: "ShipporiMinchoB1";}
.ZenKakuGothicNew { font-family: "ZenKakuGothicNew";}
.ZenMaruGothic    { font-family: "ZenMaruGothic";}
.ZenOldMincho     { font-family: "ZenOldMincho";}

.w-100 { font-weight: 100;}
.w-200 { font-weight: 200;}
.w-300 { font-weight: 300;}
.w-400 { font-weight: 400;}
.w-500 { font-weight: 500;}
.w-600 { font-weight: 600;}
.w-700 { font-weight: 700;}
.w-800 { font-weight: 800;}
.w-900 { font-weight: 900;}

/*  */
.sample-pre, .sample-html, .sample-css {
  text-align: left;
  font-size: clamp(1.3rem, 1.5vw, 1.8rem);
  border-radius: 6px;
  margin: 1px 0;
  padding: 12px;
}

.sample-pre {
  background: #eaeaea;
}

.sample-html,
.sample-css
 {
  background: #ddd;
}
/* 
.sample-html {
  color: #ddd;
}

.sample-css {
  color: #ccc;
} */


/* font size */

/* color */

.color-title {
 border-top: 2px solid #bbb; 
 padding: 6px 0;
}

.color-box {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-gap: 1px;
  margin: 0 0 24px;
}
.color-box div {
  padding: 12px 6px;
}

.color-box .color-pu {
  text-decoration: underline;
}