@charset "utf-8";

body {
    font-family: 'Noto Sans JP', sans-serif;
    letter-spacing: 0.1rem;
}

.flex {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ボタン */
button {
    text-align: center;
    background: transparent;
    margin: 0 auto;
    display: block;
}

button a {
    display: inline-block;
    color: #fff;
    padding: 18px 45px;
    border-radius: 50px;
    text-decoration: none;
    outline: none;
    background: linear-gradient(90deg, rgb(153, 204, 51) 0%, rgb(102, 204, 255) 100%);
    background-position: 1% 50%;
    background-size: 200% auto;
    box-sizing: border-box;
    font-size: 20px;
}
button a:hover {
    color: #fff;
    background-position: 99% 50%;
}
button a br {
  display: none;
}
.backnumber {
  display: flex;
  justify-content: center;
  margin: 0 auto;
  padding-bottom: 50px;
  width: 80%;
}
.backnumber a {
  display: block;
  width: fit-content;
  border-radius: 5px;
  margin:0 5px 10px;
  padding: 15px 30px;
  letter-spacing: 1px;
  background-image: linear-gradient(125deg,  rgb(153, 204, 51) 0%, rgb(102, 204, 255)  60%);
  filter: drop-shadow(1px 1px 1px rgb(230, 228, 228));
  border:2px solid white;
  color: white;
  text-align: center;
  box-sizing: border-box;
}
.backnumber a span {
  display: block;
  color:white;
  font-size: 15px;
  padding-bottom: 5px;
}
@media only screen and (max-width: 510px) {
button {
    width: 80%;
  }
.entry button {  
  width: 100%;
}
button a {
    padding: 18px 0;
    width: 100%;
    font-size: 18px;
  }
  button a br {
    display: block;
  }
  .backnumber {
    flex-direction: column;
    margin: 0 auto;
}
  .backnumber a {
    width: 100%;  
  padding: 15px 10px;
  }

}

.reflection-img{
    width       :510px;
    position    :relative;
    overflow    :hidden;
}

.reflection {
    height      :100%;
    width       :30px;
    position    :absolute;
    top         :-180px;
    left        :0;
    background-color: #fff;
    opacity     :0;
    transform: rotate(45deg);
    animation: reflection 2s ease-in-out infinite;
    -webkit-transform: rotate(45deg);
    -webkit-animation: reflection 2s ease-in-out infinite;
    -moz-transform: rotate(45deg);
    -moz-animation: reflection 2s ease-in-out infinite;
    -ms-transform: rotate(45deg);
    -ms-animation: reflection 2s ease-in-out infinite;
    -o-transform: rotate(45deg);
    -o-animation: reflection 2s ease-in-out infinite;
}
 
@keyframes reflection {
    0% { transform: scale(0) rotate(45deg); opacity: 0; }
    80% { transform: scale(0) rotate(45deg); opacity: 0.5; }
    81% { transform: scale(4) rotate(45deg); opacity: 1; }
    100% { transform: scale(50) rotate(45deg); opacity: 0; }
}
@-webkit-keyframes reflection {
    0% { -webkit-transform: scale(0) rotate(45deg); opacity: 0; }
    80% { -webkit-transform: scale(0) rotate(45deg); opacity: 0.5; }
    81% { -webkit-transform: scale(4) rotate(45deg); opacity: 1; }
    100% { -webkit-transform: scale(50) rotate(45deg); opacity: 0; }
}
@-moz-keyframes reflection {
    0% { -moz-transform: scale(0) rotate(45deg); opacity: 0; }
    80% { -moz-transform: scale(0) rotate(45deg); opacity: 0.5; }
    81% { -moz-transform: scale(4) rotate(45deg); opacity: 1; }
    100% { -moz-transform: scale(50) rotate(45deg); opacity: 0; }
}
@-ms-keyframes reflection {
    0% { -ms-transform: scale(0) rotate(45deg); opacity: 0; }
    80% { -ms-transform: scale(0) rotate(45deg); opacity: 0.5; }
    81% { -ms-transform: scale(4) rotate(45deg); opacity: 1; }
    100% { -ms-transform: scale(50) rotate(45deg); opacity: 0; }
}
@-o-keyframes reflection {
    0% { -o-transform: scale(0) rotate(45deg); opacity: 0; }
    80% { -o-transform: scale(0) rotate(45deg); opacity: 0.5; }
    81% { -o-transform: scale(4) rotate(45deg); opacity: 1; }
    100% { -o-transform: scale(50) rotate(45deg); opacity: 0; }
}

@keyframes reflection {
  0% { transform: scale(0) rotate(45deg); opacity: 0; }
  80% { transform: scale(0) rotate(45deg); opacity: 0.5; }
  81% { transform: scale(4) rotate(45deg); opacity: 1; }
  100% { transform: scale(50) rotate(45deg); opacity: 0; }
}
@-webkit-keyframes reflection {
  0% { -webkit-transform: scale(0) rotate(45deg); opacity: 0; }
  80% { -webkit-transform: scale(0) rotate(45deg); opacity: 0.5; }
  81% { -webkit-transform: scale(4) rotate(45deg); opacity: 1; }
  100% { -webkit-transform: scale(50) rotate(45deg); opacity: 0; }
}
@-moz-keyframes reflection {
  0% { -moz-transform: scale(0) rotate(45deg); opacity: 0; }
  80% { -moz-transform: scale(0) rotate(45deg); opacity: 0.5; }
  81% { -moz-transform: scale(4) rotate(45deg); opacity: 1; }
  100% { -moz-transform: scale(50) rotate(45deg); opacity: 0; }
}
@-ms-keyframes reflection {
  0% { -ms-transform: scale(0) rotate(45deg); opacity: 0; }
  80% { -ms-transform: scale(0) rotate(45deg); opacity: 0.5; }
  81% { -ms-transform: scale(4) rotate(45deg); opacity: 1; }
  100% { -ms-transform: scale(50) rotate(45deg); opacity: 0; }
}
@-o-keyframes reflection {
  0% { -o-transform: scale(0) rotate(45deg); opacity: 0; }
  80% { -o-transform: scale(0) rotate(45deg); opacity: 0.5; }
  81% { -o-transform: scale(4) rotate(45deg); opacity: 1; }
  100% { -o-transform: scale(50) rotate(45deg); opacity: 0; }
}

.mask-bg {
    color: transparent;
    display: inline-block;
    font-size: 36px;
    font-weight: bold;
    overflow: hidden;
    position: relative;
    transition: color 0ms 450ms;
  }
  .mask-bg::after {
    background: linear-gradient(to right, #362ae0 0%,#3b79cc 50%,#42d3ed 100%);
    bottom: 0;
    content: '';
    display: block;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transform: translate(0, 100%);
  }
   
  .mask-bg.is-animated {
    color: #362ae0;
  }
  .mask-bg.is-animated::after {
    animation: mask-bg 1.2s cubic-bezier(0.8, 0, 0.170, 1);
  }
   
  @keyframes mask-bg {
    0% {
      transform: translate(0, 101%)
    }
    40%, 60% {
      transform: translate(0, 0%)
    }
    100% {
      transform: translate(0, -100%)
    }
  }