body {
    padding: none;
    background-color:#292b2f;
    margin: 0;
}

h1 {
    margin-top: 0;
    margin-bottom: 50px;
    background-color: #202225;
    width: 100%;
    padding: 20px 0 20px;
    text-align: center;
    box-shadow: 0px 0px 9px rgba(0,0,0, .4);
}

h2 {
    margin-top: 30px;
}

h1, h2, button {
    font-family: 'Trebuchet MS', sans-serif;
    color: #fff;
}

label, input, p, a {
    font-family: 'Trebuchet MS', sans-serif;
    color: #e9e9e9e9;
}

#main {
    width: 620px;
    height: 100vh;
    margin: 0 auto;
    padding: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #36393f;
    box-shadow: 0px 0px 9px rgba(0,0,0, .4);
    position: relative;
}

@media(max-width: 620px) {
    #main {
        width: 100%;
    }

    label {
        font-size: 0.9rem;
    }

}

#button-div {
    width: 85%;
    padding-bottom: 20px;

    display: flex;
    justify-content: space-between;

    border-bottom: 2px solid #292b2f;
}

.label {
    justify-content: space-between;
    display: flex;
    width: 85%;
    align-items: center;
    margin-bottom: 15px;
}

input {
    outline: 0;
    background-color: #202225;
    border: none;
    width: 160px;
    height: 25px;
    text-align: center;
    padding: 0 10px;
}

.input-block {
    position: relative;
}

.input-block:focus-within::after {
    content: '';
    width: calc(100% - 20px);
    height: 2px;
    background-color: #578b6e;
    position: absolute;
    bottom: 0;
    left: 10px;
}

button {
    border: none;
    width: 100px;
    height: 40px;
    cursor: pointer;
    margin-top: 20px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 16px;
    outline: 0;
    transition: 0.3s;
}

#calc-button{
    background-color: #578b6e;
}

#calc-button:hover {
    background-color: #49745b;
}

#credits-button {
    background-color: #202225;
}

#credits-button:hover {
    background-color: #1a1b1c;
}

#credits {
    position: absolute;
    left: 7.5%;
    bottom: 5px;
    display: none;
    flex-direction: column;
}

#credits > p {
    margin-bottom: 5px;
    font-size: 0.8rem;
}

#credits > a {
    display: block;
    width: fit-content;
    margin-bottom: 10px;
    text-decoration: none;
    color: #51c782;
    font-size: 0.8rem;
}