*{
    box-sizing: border-box;
}

@keyframes bounce {
    0%,100%{
        transform: translateY(0);
    }
    50%{
        transform: translateY(-10px);
    }
}

body{
    background-color: #296ca8;
    color: #fff;
    font-family: 'Roboto', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    padding-bottom: 100px;
}
h1{
    margin-bottom: 0;
    text-align: center;
}
.filter-container{
    margin-top: 20px;
    width: 80vw;
    max-width: 800px;
}
.filter{
    width: 100%;
    padding: 12px;
    font-size: 16px;
}

.post{
    position: relative;
    background-color: #4992d3;
    box-shadow: 0 2px 4px rgba(0,0,0,.3);
    border-radius: 3px;
    padding:20px;
    margin: 40px 0;
    display: flex;
    width: 80vw;
    max-width: 800px;
}
.post .post-title{
    margin: 0;
}
.post .post-body{
    margin: 15px 0 0;
    line-height: 1.3;
}
.post .post-info{
    margin-left: 20px;
}

.post .number{
    position: absolute;
    left: -15px;
    top: -15px;
    font-size: 15px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background:#fff;
    color:  #296ca8;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 7px 10px;
}
.loader{
    opacity: 0;
    display: flex;
    position: fixed;
    bottom: 50px;
    transition: opacity .3s ease-in;
}
.loader.show{
    opacity: 1;
}
.circle{
    background-color: #fff;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin: 5px;
    animation: bounce .5s ease-in infinite;
}

.circle:nth-of-type(2){
    animation-delay: .1s;
}
.circle:nth-of-type(3){
    animation-delay: .2s;
}