body {
    font-family: Arial, sans-serif;
    background-image: linear-gradient(to right top, #051937, #004d7a, #008793, #00bf72, #a8eb12);
    background-repeat: no-repeat;
    background-size: cover;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

h1 {
    margin: 40px;
    font-weight: 900;
    font-size: 3.2em;
}

.container {
    width: 60%;
    height: 50vh;
    text-align: center;
    padding: 20px;
    border-radius: 8px;
    box-shadow: rgba(0, 0, 0, 0.15) 0px 15px 25px, rgba(0, 0, 0, 0.05) 0px 5px 10px;
    background-color: transparent;
}

.inp {
    font-size: 1.2em;
    padding: 9px;
    width: 50%;
    height: 4em;
    margin-bottom: 10px;
    border-radius: 10px;
    box-sizing: border-box;
    border: none;
}

.grp_btns {
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
}

.btn {
    font-size: 1.2em;
    padding: 10px;
    margin-top: 5px;
    border-radius: 6px;
    border: none;
    box-shadow: 0 2px 4px darkslategray;
    cursor: pointer;
}

button.btn {
    transition: all 0.03s linear;
}

button.btn:hover {
    background-color: #65b9e6;
}

button.btn:active {
    box-shadow: 0 0 2px darkslategray;
    transform: translateY(2px);
}

#output {
    display: flex;
    flex-direction: row;
    justify-content: center;
    color: whitesmoke;
    font-size: 2em;
    font-weight: 800;
    position: relative;
    padding: 20px;
    top: 100px;
    border: none;
    border-radius: 8px;
    min-height: 90px;
    box-sizing: border-box;
}

.sup_id {
    font-weight: lighter;
}

.spn {
    font-weight: lighter;
    margin-right: 9px;
}