html,body{
    margin: 0px;
    padding: 0px;
}
*{
    box-sizing: border-box;
}

.container{
    max-width: 1200px;
    margin: 20px 10px;
    height: 800px;
}
.header{
}
.header-child{
    width: 100%;
    min-height: 100px;
    margin-top: 10px;
    display: flex;
}
.header-child .box{
    width: 50%;
    float: left;
}
.select-box{
    padding: 35px 0px;
}
.select-box select{
    min-width: 100%;
    font-size: 20px;
    outline: none;
    border: none;
    cursor: pointer;
}
.action-box{
    padding: 25px 0px;
}
.action-box button{
    float: right;
    font-size: 20px;
    width: 140px;
    padding: 10px;
    background: #2d77ff;
    border: none;
    color: #fff;
    cursor: pointer;
}
.api-text-box{
    width: 100%;
    border: 1px solid #d5d5d5;
    padding: 10px;
    font-size: 20px;
    font-family: monospace;
}
.videolist{
    margin-top: 10px;
}
.videolist >div {
    width: 200px;
    float: left;
    margin: 10px;
    height: 250px;
}
img {
    width: 100%;
}
.title{
    padding: 10px;
}

@media only screen and (max-width: 600px) {
    .container {
      margin: 20px 10px;
    }
}
@media (min-width: 1200px){
    .container {
        margin: 20px auto;
    }
  }


  .videolist div.loader{
    border: 16px solid #f3f3f3;
    border-radius: 50%;
    border-top: 16px solid #3498db;
    width: 120px;
    height: 120px;
    -webkit-animation: spin 2s linear infinite; /* Safari */
    animation: spin 2s linear infinite;
    float: none;
    margin: auto;
  }
  
  /* Safari */
  @-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }