style.css

.first-modal
{
    display: none;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    z-index: 1;
}
.add
{
    background-color: #4CAF50;
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
}
.add:hover
{
    background-color: lime;
    color:white;
}
.delete
{
    background-color: #ff0000;
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
}
.delete:hover
{
    background-color: rgb(255, 62, 62);
    color:white;
}
.modal-header
{
    background-color: firebrick;
    margin: 10% 10% 0% 10%;
    padding: 1% 1% 1% 1%;
    color:floralwhite;
}
.modal-list
{
    overflow: auto;
    margin: 0% 10% ;
    padding: 0.2% 0.2% 0.2% 0.2%;
    background-color: rgb(194, 250, 179);
}
.modal-list-elem
{
    margin: 0.5% 0.1%;
    padding: 0.1%;
    background-color: rgb(179, 179, 241);    
}
.modal-list-elem:hover
{
    margin: 0.5% 0.1%;
    padding: 0.1%;
    background-color: rgb(215, 215, 250);    
}
.modal-header-content
{
    display:inline;
}
.modal-close
{
    cursor: pointer;
    float: right;
}
.second-modal
{
    display: none;
    position: fixed;
    left: 5%;
    top: 5%;
    width: 100%;
    height: 100%;
    overflow: auto;
    z-index: 2;
}
#add-task-header
{
    background-color:darkgreen;
    margin: 10% 10% 0% 10%;
    padding: 1% 1% 1% 1%;
    color:floralwhite;
}
#add-task-content
{
    overflow: auto;
    margin: 0% 10% ;
    padding: 0.2% 0.2% 0.2% 0.2%;
    background-color:rgb(236, 248, 237);
}
#task-detail-header
{
    background-color:lightseagreen;
    color:linen;
}
#task-detail-content
{
    overflow: auto;
    margin: 0% 10% ;
    padding: 0.2% 0.2% 0.2% 0.2%;
    background-color:rgb(236, 248, 237);
}