*,
*:before,
*:after {
    -webkit-box-sizing: inherit;
    box-sizing: inherit;
}

html {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-size: 62.5%;
}

.yajirusi {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
}

.yajirusi .btn,
.yajirusi a.btn,
.yajirusi button.btn {
  line-height: 1.5;
  position: relative;
  display: inline-block;
  padding: 1rem 4rem;
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
  text-align: center;
  vertical-align: middle;
  text-decoration: none;
  letter-spacing: 0.1em;
  color: #212529;
  border-radius: 0.5rem;
}

.yajirusi-left {
    left: 5%;
}

.yajirusi-right {
    right: 5%;
}

.yajirusi a.btn--circle {
    width: 60px;
    height: 60px;
    padding: 0;
    background: #fff;
    border-radius: 50%;
    -webkit-box-shadow: 0 3px 5px rgba(0, 0, 0, .3);
    box-shadow: 0 3px 5px rgba(0, 0, 0, .3);
}
  
.yajirusi a.btn--circle i {
    font-size: 25px;
    line-height: 60px;
    transition: all .3s;
    letter-spacing: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.yajirusi-left a.btn--circle:hover i {
    transform: translateX(-3px);
}

.yajirusi-right a.btn--circle:hover i {
    transform: translateX(3px);
}