<section class="s-3">
    <div class="container">
      <header class="header3">
        <h1 class="site-title3">
          <a href="./">
            いのプロ
          </a>
        </h1>
        <div class="nav-wrapper">
          <nav class="header-nav">
            <ul class="nav-list3">
              <li class="nav-item3 to-right">
                <a href="https://crestadesign.org/">
                  About
                </a>
              </li>
              <li class="nav-item3 to-right">
                <a href="https://crestadesign.org/">
                  News
                </a>
              </li>
              <li class="nav-item3 to-right">
                <a href="https://crestadesign.org/">
                  Access
                </a>
              </li>
            </ul>
          </nav>
        </div>
      </header>
    </div>
  </section>

li {
  list-style: none;
}

a {
  text-decoration: none;
  color: rgb(0, 0, 0);
  transition: 0.6s;
  -webkit-transition: 0.6s;
  -moz-transition: 0.6s;
  -ms-transition: 0.6s;
  -o-transition: 0.6s;
}


.header3{
  background-color: rgb(186, 240, 179);
  color: rgb(130, 203, 246);
  height: 80px;
  padding: 0 50px;
  border-bottom:1px solid rgb(255, 255, 255);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sait-title3 a {
  display: block;
  font-size: 1.5rem;
  color: rgb(51, 51, 51);
  padding: 20px 5px;
}

.nav-list3 {
  display: flex;
  justify-content: space-between;
}

.nav-item3 {
  margin-right: 50px;
  position: relative;
}

.nav-item3 a {
  display: block;
  font-size: 1.5rem;
  padding: 20px 10px;
}

.nav-item3::after {
  background-color: rgb(234, 30, 146);
  bottom: 20px;
  content: "";
  display: block;
  height: 3px;
  position: absolute;
  transition: 0.3s all;
  width: 0;
}

.nav-item3:hover:after {
  width: 100%;
}

.to-right::after {
  left: 0;
}