* {
    font-family: 'Source Code Pro', monospace;
}
input {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    
}

.container3 {
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    align-items: center;
    text-align: center;
    min-height: 100vh;
    
}

.btn-1 {
    width: 200px;
    height: 100px;
    border: none;
    color: white;
    background-color: rgb(255, 153, 0);
    border-radius: 4px;
    box-shadow: inset 0 0 0 0 #f9e506;
    transition: ease-out 0.3s;
    font-size: 2rem;
    outline: none;
}
.btn-1:hover {
    box-shadow: inset 300px 0 0 0 #f9e506;
    cursor: pointer;
    color: #000;
}
.container4 {
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    align-items: center;
    text-align: center;
    min-height: 100vh;
}
.btn-2 {
    width: 200px;
    height: 100px;
    border: none;
    color: white;
    background-color: rgb(255, 153, 0);
    border-radius: 4px;
    box-shadow: inset 0 0 0 0 #f9e506;
    transition: ease-out 0.3s;
    font-size: 2rem;
    outline: none;
}
.btn-2:hover {
    box-shadow: inset 300px 0 0 0 #f9e506;
    cursor: pointer;
    color: #000;
}