@font-face{font-family:hanh; src:url("../fonts/HanNomKai.ttf");}
html,body{margin:0; padding:0; width:100%; height:100%; overflow:hidden; background:#ffefd5;}
.thanhcongcu{width:100%; height:2vw; padding: 1vw;  text-align:center; font-size:150%; font-weight:800; color:yellow; background:#7a4b23; position:fixed; top:0px; z-index:4;}
.home{width:4%; height:4vw; position:fixed; left:0px; top:0px; z-index:5;}        
.menu{width:4%; height:4vw; position:fixed; right:0px; top:0px; z-index:5;}        
.mode{position:fixed; bottom:0px; right:0px; z-index:999;}
.btn{border:none; background:#6b3f1d; color:white; padding:1px 10px; border-radius:10px; font-size:15px; cursor:pointer;}
.book{width:100vw; height:100vh; overflow-x:auto; overflow-y:hidden; -webkit-overflow-scrolling:touch}
.page{display:flex; flex-direction:row-reverse; align-items:flex-start; gap:20px; min-width:max-content; padding:35px;}
.column{writing-mode:vertical-rl; text-orientation:upright; white-space:nowrap; min-width:80px;}
.chu{position:relative; display:inline-block; white-space:nowrap; font-family:hanh, serif; font-size:clamp(55px,5vw,64px); font-weight:700; line-height:1.15; margin:8px 0; color:#1a0d00; padding-right:40px;}
.phienam{position:absolute;left:50%; top:6px; margin-left:10px; font-size:20px; font-family:'Times New Roman', Times, serif; color:#4b2d16; writing-mode:horizontal-tb; white-space:nowrap;}
.space-1{display:inline-block; height:80px;}
.space-2{display:inline-block; height:180px;}
.hide-am .phienam{display:none;}
.hide-am .chu{padding-right:0;}
.dark{background:#111;}
.dark .chu{color:#e8d7b5;}
.dark .phienam{color:#bda98b;}

@media(max-width:700px){
    .thanhcongcu{width:100%; height:6vw; padding: 1vw;  text-align:center; font-size:120%; font-weight:800; color:yellow; background:#7a4b23; position:fixed; top:0px; z-index:4;}
    .home{width:10%; height:10vw; position:fixed; left:0px; top:0px; z-index:5;}  
    .menu{width:10%; height:10vw; position:fixed; right:0px; top:0px; z-index:5;}  
    .chu{padding-right:40px;}
    .phienam{font-size:17px;}
}