*{box-sizing:border-box;font-family:Arial;}
body{margin:0;padding:20px;background:#f5f5f5;}
.container{max-width:1000px;margin:0 auto;}
.login-box{max-width:400px;margin:50px auto;padding:20px;background:white;border-radius:8px;box-shadow:0 0 10px #ccc;}
.video-list{margin-top:20px;}
.video-item{background:white;padding:15px;margin-bottom:10px;border-radius:5px;display:flex;justify-content:space-between;align-items:center;}
.play-btn,.admin-btn,.logout,.del-btn{padding:8px 15px;background:#007bff;color:white;text-decoration:none;border-radius:4px;}
.del-btn{background:#dc3545;}
.upload-box{background:white;padding:20px;margin:20px 0;border-radius:8px;}
input,button{width:100%;padding:10px;margin:8px 0;border:1px solid #ddd;border-radius:4px;}
button{background:#28a745;color:white;border:none;cursor:pointer;}
.err{color:red;text-align:center;}