@keyframes spinner-border {
    to { transform: rotate(360deg); }
}
.spinner-border {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    vertical-align: text-bottom;
    border: 0.25em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    -webkit-animation: spinner-border .75s linear infinite;
    animation: spinner-border .75s linear infinite;
}
.loader{
    text-align: center;
    position: fixed;
    width: 100%;
    top: 50%;
}
.main{
    margin: 40px 0;
}
.textarea_area textarea{
    width: 100%;
    min-height: 300px;
    padding: 15px 20px;
    margin-top: 25px;
    border: 1px solid #c5c5c5;
    border-radius: 10px;
}
.title{
    font-size: 21px;
}
.check_area{
    font-size: 18px;
}
.check_area label{
    margin-bottom: 0px;
    margin-left: 10px;
}
header{
    background: #2e3a47;
    color: #fff;
    padding: 10px 0;
}
header .container{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}
.add_button{
    display: block;
    background: #2e3a47;
    padding: 5px;
    border-radius: 50%;
    border: none;
    margin: 10px 0;
    margin-left: auto;
    cursor: pointer;
}
.add_button img{
    width: 30px;
}
.ready{
    display: block;
    background: #2e3a47;
    padding: 10px 15px;
    color: #fff;
    border-radius: 10px;
    border: none;
    margin: 10px 0;
    margin-left: auto;
    cursor: pointer;
    font-weight: 500;
    font-size: 18px;
}
.input_area input{
    outline: none;
    width: 100%;
    margin: 10px 0;
    border: 1px solid #c5c5c5;
    line-height: 40px;
    padding: 0 10px;
    border-radius: 10px;
}
.input_area input:first-child{
    margin-top: 20px;
}
.input_area input:last-child{
    margin-bottom: 20px;
}
.add_button:disabled{
    opacity: 0.7;
    cursor: no-drop;
}
.loader_area{
    display: none;
    position: fixed;
    width: 100%;
    height: 100vh;
    top: 0;
    background: #fff;
}
.loader>a{
    color: #fff;
    background: #2e3a47;
    padding: 15px 20px;
    font-size: 20px;
    border-radius: 10px;
    text-decoration: none;
}