:root{
  --bg:#f2f2ee;
  --paper:#fbfbf8;

  --text:#2c2c2a;
  --muted:#70746f;
  --line:#d8ddd6;

  --blue:#91a8b5;
  --yellow:#e4d8a7;
}

*{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;

  background:var(--bg);
  color:var(--text);

  font-family:
    "Hiragino Sans",
    "Noto Sans JP",
    sans-serif;

  font-size:16px;

  line-height:2.08;
  letter-spacing:.02em;

  -webkit-font-smoothing:antialiased;
}

main{
  width:min(100%, 980px);

  margin:0 auto;

  padding:
    34px
    18px
    120px;
}

article{
  background:var(--paper);

  border-radius:30px;

  padding:
    clamp(34px, 6vw, 82px)
    clamp(24px, 6vw, 84px)
    120px;
}

img{
  max-width:100%;
  display:block;
}

h1,
h2,
h3,
p,
ul,
li{
  margin-top:0;
}

h1{
  margin-bottom:0;

  font-size:clamp(2.2rem, 4.5vw, 3.3rem);
  line-height:1.34;

  letter-spacing:.03em;

  font-weight:650;
}

h2{
  margin:0 0 26px;

  font-size:1.42rem;
  line-height:1.6;

  font-weight:650;

  position:relative;
}

h2::before{
  content:"";

  display:block;

  width:42px;
  height:2px;

  border-radius:999px;

  background:var(--blue);

  margin-bottom:18px;
}

h3{
  margin:
    36px
    0
    16px;

  font-size:1.03rem;
  line-height:1.8;

  font-weight:650;

  color:#404340;
}

p{
  margin-bottom:0;

  max-width:41em;
}

p + p{
  margin-top:1.4em;
}

ul{
  margin:0;
  padding-left:1.2em;
}

li + li{
  margin-top:10px;
}

a{
  color:#557587;

  text-decoration-thickness:1px;
  text-underline-offset:3px;
}

footer{
  margin-top:90px;

  color:#7b7f7a;

  font-size:.9rem;

  line-height:1.9;
}

footer p + p{
  margin-top:10px;
}

.copyright{
  margin-top:18px;

  font-size:.84rem;

  color:#8b8f8a;
}

.footer-links{
  display:flex;

  flex-wrap:wrap;
  gap:18px;

  margin-bottom:18px;
}

.footer-links a{
  color:var(--muted);

  text-decoration:none;

  transition:opacity .18s ease;
}

.footer-links a:hover{
  opacity:.7;
}

@media (max-width:720px){

  article{
    border-radius:24px;

    padding:
      32px
      22px
      92px;
  }

  h1{
    font-size:2.1rem;
  }

}