style.css

* {
    margin: 0;
    padding: 0;
}
body{
    background-color: #f9f9f9;
}
.fixedHeader {
    position: fixed;
    overflow: hidden;
    width: 100%;
    top: 0;
    margin-bottom: 100px;
}
.headerWrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #333333;
    padding: 10px 50px;
}
.title {
    color: #ffffff;
}
.budgetContainer {
    display: flex;
}
.budget {
    display: none;
    color: #ffffff;
    margin-right: 20px;
}
.container {
    margin: 50px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}
.section {
    padding: 20px;
    margin-top: 20px;
    width: 200px;
    height: 220px;
    display: inline-block;
    text-align: center;
    -webkit-box-shadow: 0px 4px 12px -4px rgba(0,0,0,0.3);
    -moz-box-shadow: 0px 4px 12px -4px rgba(0,0,0,0.3);
    box-shadow: 0px 4px 12px -4px rgba(0,0,0,0.3);
}
.sectionTitle{
    border-bottom: 1px solid #21bb58;
    margin-bottom: 10px;
    padding-bottom: 5px;
}
.buttons {
    margin-bottom: 10px;
}
.timer{
    padding: 12px;
    margin-bottom: 12px;
    -webkit-box-shadow: inset 0px 0px 8px -2px rgba(0,0,0,0.3);
    -moz-box-shadow: inset 0px 0px 8px -2px rgba(0,0,0,0.3);
    box-shadow: inset 0px 0px 8px -2px rgba(0,0,0,0.3);
}
.select{
    margin-bottom: 8px;
}
.select select {
    background-color: #eeeeee;
    outline: none;
    cursor: pointer;
}
.select span{
    font-size: 18px;
}
.inTime input {
    padding: 2px 6px;
    outline: none;
    font-size: 14px;
}
.stop-btn {
    background-color: #fd3737;
    display: none;
}
.input{
    display: none;
}
.input input{
    width: 120px;
}
.balance span {
    color: green;
}
 button {
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    border: none;   
    outline: none;
    color: white;
    background-color: #21bb58;
}