style.css

@charset "utf-8";
/* CSS document */

* {
    padding: 0;
    margin: 0;
}

html, body {
    height: 100%;
    background-image: radial-gradient(at center, #253770, #382569);
}

#container {
    min-height: calc(100% - 10em);
}

#title {
    color: white;
    background-color: #2b4499;
    font: 2.5em "Helvetica", "Candara", "Arial";
    width: fit-content;
    top: 20px;
    left: calc(50% - 230px);
    padding: 5px 25px 5px 25px;
    border-radius: 20px;
    text-shadow: 5px 5px 5px #000000;
    box-shadow: 0px 5px 10px #220a36;
    position: absolute;
    transition: 3s ease-in-out 0.1s;
    user-select: None;
}

#calculator {
    user-select: None;
    top: 98px;
    left: calc(50% - 300px);
    width: 600px;
    height: 600px;
    background-image: radial-gradient(at center, #281f58 70%, #193444);
    border-radius: 30px;
    box-shadow: 10px 10px 25px black;
    position: absolute;
}

#skull {
    top: 120px;
    left: calc(50% + 300px);
    position: absolute;
}

#calculator-interface {
    margin: 17px;
    width: 560px;
    height: 565px;
    background-image: linear-gradient(to top right, #131f30, #1d2b3d);
    position: relative;
    border-radius: 15px;
}

#calculator-screen {
    position: absolute;
    background-image: radial-gradient(at center, #375077 25%, #2d446b);
    border: #213353 inset 4px;
    width: 504px;
    height: 80px;
    top: 6%;
    left: 25.2px;
    border-radius: 5px;
}

#screen-top, #screen-bottom {
    position: absolute;
    width: 100%;
}

#screen-top {
    top: 0;
    height: 30%;
    background-color: #2e4366;
}

#screen-bottom {
    top: 30%;
    height: calc(70% - 5px);
    background-color: #293c5e;
    border-top: #31486e solid 5px;
}

#nums-top, #nums-bottom {
    position: absolute;
    width: 100%;
    height: 100%;
    font-family: "Arial", "Helvetica", "sans-serif", "Century Gothic";
    text-align: right;
}

#nums-top {
    color: #e0e0e0b0;
    font-size: 18px;
    padding: 2px 0;
    user-select: text;
}

#nums-bottom {
    color: #e0e0e0;
    font-size: 43px;
    user-select: text;
}

#functional-container {
    position: absolute;
    width: 520px;
    height: 60px;
    top: 23.5%;
    left: 27px;
}

#nums-container {
    background-image: linear-gradient(to top right, #16253b, #1e3047);
    position: absolute;
    border-radius: 10px;
    width: 299.6px;
    height: 61%;
    top: 37%;
    left: 11.2px;
}

#arithmetic-container {
    position: absolute;
    left: 327.8px;
    width: 215px;
    top: calc(53% - 90px);
}

.button {
    margin: 5px;
    font-family: "helvetica", "century gothic", "arial";
    color: white;
    border-radius: 5px;
    display: flex;
    float: left;
    justify-content: center;
    align-items: center;
    transition: 0.17s ease-in-out 0.01s;
}

.button:hover {
    transform: scale(1.15);
    cursor: pointer;
}

#functional-container .button:active,
#nums-container .button:active,
#arithmetic-container .button:active{
    transition: 0.01s ease-in-out 0.01s;
    transform: scale(1);
}

#functional-container .button:active {
    background-color: #182a53;
}

#arithmetic-container .button:active {
    background-color: #273e61;
}

#nums-container .button:active {
    background-color: #1c385e;
}

#functional-container .button {
    border: #3e568a dashed 3px;
    font-size: 2.2em;
    width: 70px;
    height: 55px;
}

#skull img {
    user-select: none;
    transition: transform 1s ease-in-out 1s;
};

#skull, #functional-container #del1 img {
    user-select: none;
}

#functional-container #del1 img {
    width: 40px;
    height: 40px;
}

#euler, #factorial, #pi {
    font-family: 'Times New Roman', Times, serif;
}

.numbers-line {
    margin: 13px 0 20px 4%;
    clear: both;
}

#nums-container .button {
    background-color: #243b5a;
    font-size: 2.2em;
    width: 80px;
    height: 70px;
}

#nums-container #clear {
    font-size: 1.8em;
    background-color: #291246;
    border: 1px solid #1103244d;
}

#nums-container #clear:active {
    background-color: #3a1764;
}

#functional-container #del1,
#functional-container #ce {
    font-size: 1.3em;
    background-color: #472a69;
    border: 1px solid #280e4d80;
}

#functional-container #del1:active,
#functional-container #ce:active {
    background-color: #462075;
}

#nums-container #comma {
    font-size: 3em;
    align-items: flex-start;
}

#arithmetic-container .button {
    background-color: #24355a;
    font-size: 2.2em;
    width: 95px;
    height: 55px;
}

#arithmetic-container #equalTo {
    background-color: #3a5285;
    width: calc(100px * 2);
    height: 65px;
}

#arithmetic-container #equalTo:active {
    background-color: #314e8b;
    transform: scale(1.09);
}

footer {
    background-image: linear-gradient(to right, #19171b 20%, #18181a 20%);
    height: 18rem;
    width: 99.1vw;
    overflow: hidden;
}

#logo-container {
    float: left;
    padding: 25px 50px 0 30px;
}

#logo-container img {
    width: 265px;
    height: auto;
}

.footer-third {
    width: calc(21.6666666667% - 20px);
    margin-right: 10px;
    margin-top: 10px;
    float: left;
}

.footer-third:last-child {
    margin-right: 0;
}

.footer-third h1 {
    font-family: "arial", "sans-serif";
    font-size: 30px;
    color: white;
    display: block;
    font-weight: 200px;
    width: 100%;
    margin-bottom: 20px;
    margin-top: 20px;
}

.footer-third a {
    font-family: "arial", "sans-serif";
    font-size: 18px;
    color: #8d8a96;
    display: table;
    font-weight: 200;
    width: fit-content;
    margin-bottom: 20px;
    cursor: pointer;
    text-decoration: none;
    transition: 0.2s ease-in-out 0.01s;
}

.footer-third a:hover {
    color: white;
    transform: scale(1.15);
    text-decoration: underline;
}

.footer-third li {
    display: inline-block;
    padding: 0 5px;
    font-size: 20px;
}

.footer-third span {
    color: white;
    font-family: "arial", "sans-serif";
    font-size: 18px;
    font-weight: 200;
    display: block;
    width: 105%;
}

.footer-third li i {
    font-size: 65px;
    padding-right: 15px;
}

/* --- -Responsive alterations- ---*/

@media (max-height: 1040px) {
    #container {min-height: calc(10vh + 700px);}
    footer {width: 118.9em;}
}