@charset "utf-8";

html {
    font-size: 16px;
}

/* 「*」はユニバーサルセレクタ(すべての要素を対象にするセレクタ)でbox-sizing: border-box;を指定 */
/* この指定(してい)はborderとpaddingをボックスサイズ(widthとheight)の中に含めて算出するので、スタイリングがしやすい*/
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    line-height: normal;
    /*ブラウザが自動的に行間を決める*/
    font-family: "Helvetica Neue",
        Arial,
        "Hiragino Kaku Gothic ProN",
        "Hiragino Sans",
        Meiryo,
        sans-serif;
    background-image: url(../img/moi.jpeg);
    background-size:auto;
    overflow:hidden;
}

p {
    margin: 0;
    padding: 0;
}

header {
    margin-top: 40px;
    color: rgb(253, 4,79,0.7);
    font-size: 38px;
    font-weight:bold;
    text-shadow: 5px 5px 5px rgba(255,255, 255,0.65);
    text-align: center;
}

.wrapper {
    position: relative;
    max-width: 100vw;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    padding-bottom: 23px;
    text-align: center;
}
#btn1 {
    position: relative;
    margin:20px auto;
    width: 200px;
    height: 400px;
    background-image: url(../img/omikuji.png);
    background-size: contain;
    background-repeat: no-repeat;
    cursor:grab;
    user-select: none;
}

#btn1:hover {
    animation:shaking 0.3s infinite;  
}
@keyframes shaking{
    0%{transform: translate(0px,0px)rotateZ(0deg)}
    25%{transform: translate(2px,2px)rotateZ(1deg)}
    50%{transform: translate(0px,2px)rotateZ(0deg)}
    75%{transform: translate(2px,0px)rotateZ(-1deg)}
    100%{transform: translate(0px,0px)rotateZ(0deg)}
}
#btn1:active {
    position: relative;
    top: 10px;
    left: 10px;
}
#omikujiText{
  position: relative;
  margin: 10px auto;
  font-weight: 800;
  text-shadow: 3px 3px 3px rgba(255,255,255,0.65); 
  transition: 1s; 
}
.back{
    text-align: left;
}

#btn99{
    padding: 0.5rem;
    border-radius: 1rem;
    color: whitesmoke;
    font-size: 1.5rem;
    background: rgb(81, 231, 231);
    cursor: pointer;
}
footer {
    position:absolute;
    bottom: 5px;
    width: 100%;
    margin: 0px;
    padding: 1px;
    color: whitesmoke;
    font: 16px Rajidhani;
    text-align: center;
    background: rgba(1, 24, 31, 0.7);

}
.shutter{
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index:9999;
    margin: 0em;
    padding: 0em;
    background-color: #1e1e1e;
    animation: byeShutter 2.5s forwards;
}
.shutter::before{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 0;
    margin: auto;
    background-color: #fff;
    animation: shutterOpen 2.5s forwards;
}
@keyframes byeShutter{
    70%{
        opacity:1;
    }
    100%{
        opacity: 0;
        display: none;
        z-index: -1;
    }
}
@keyframes shutterOpen{
    0%{
        width: 0;
        height: 0.05em;
    }
    50%{
        width: 100%;
        height: 0.05em;
    }
    90%{
        width: 100%;
        height: 100%;
    }
 100%{
    width: 100%;
    height: 100%;
 }   
}
@media screen and (max-width:480px) {
    body{
        background-position: 75% 0%;
        background-size: auto 1000px;
    }
  header{
   margin-top: 20px;
   font-size: 30px;
    }
   #btn1{
    width: 150px;
    height: 280px;
   } 
   #omikujiText{
    margin: 0;
   }
}