css.css

html, body {
    background-color: #dfe0db;
}

.wrapper {
    padding: 5px;
    width: 296px;
    height: 395px;
    margin: 10% auto;
    background-color: #afb29e;
    box-shadow: 10px 10px 5px #888888;
    border-radius: 15px;
    border-style: double;
    overflow: auto;
}

p {
    font-size: 16px;
    margin: 10px;
    font-family: "Arial", Helvetica, sans-serif;
}

#firstline, #secondline {
    color: white;
    display: inline;
    float: right;
    clear: right;
}

#firstline {
    margin: 0 8px 0 0;
    font-size: 35px;
}

#secondline {
    margin: 0 8px 0 0;
    font-size: 15px;
}

.display {
    border-radius: 10px;
    width: 250px;
    height: 80px;
    margin: 10px 0 10px 15px;
    background-color: #bad3d8;
    border-color: #cedadb;
    border-style: double;
}

button {
    height: 37px;
    margin: 5px;
    float: left;
    color: white;
    box-shadow: 0px 3px 1px black;
    background-color: #48493d;
    border-color: #48493d;
    outline: none;
}

button:active {
    transform: translateY(2px);
}

.longer {
    float: right;
    margin-left: 0px;
    width: 60px;
    height: 85px;
}

.normal {
    width: 60px;
}

.larger {
    width: 130px;
}

#AC, #CE {
    background-color: #0f0d33;
    border-color: #0f0d33;
}