styles.css

/* Убираем внешние отступы */
body,
h1,
h2,
h3,
h4,
p,
ul[class],
ol[class],
li,
figure,
figcaption,
blockquote,
dl,
dd {
  margin: 0;
}

@import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;1,300&family=Zen+Antique&family=Zen+Old+Mincho&display=swap');

@font-face {
    font-family: 'Exec Corners';
    src: local('Exec Corners Medium'), local('Exec-Corners-Medium'),
        url('/fonts/Exec-Corners-Medium.ttf') format('truetype');
    font-weight: 500;
    font-style: normal;
  }

html {
    height: 100%;
}

body {
    background: linear-gradient(-45deg, #ffe60030 30%, #b700ff30 33% 60%, #1eff0030 66%);
	background-size: 300% 300%;
	animation: gradient 15s ease infinite;
    width: 100%;
    font-family: 'Ubuntu', 'Zen Antique', 'Zen Old Mincho', 'Exec-Corners-Medium';
}

header {
    backdrop-filter: hue-rotate(90deg) contrast(1.1);
    padding: 0.65104167vw 0;
}

nav {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
}

.mini_block {
    width: 100%;
}

main, footer {
    width: 100%;
    font-family: 'Ubuntu', 'Zen Antique', 'Zen Old Mincho';
}

.container {
    max-width: 78.125vw;
    margin: 0 auto;
}

section#About .container{
    display: flex;
    justify-content: space-around;
    width: 100%;
    padding-top: 15.15152vh; 
    line-height: 1.1rem;
}

section#About p {
    text-indent: 0.5rem;
    letter-spacing: 0rem;
}

section#About h2 {
    text-align: center;
}

header a {
    text-decoration: none;
    font-size: 1rem;
    color: rgb(0, 0, 0);
    transition: all 1s ease-out;
}

header a:hover {
    font-style: unset;
    color: rgb(36, 128, 24);
    background-color: rgba(255, 220, 130, 0.5);
    text-transform: uppercase;
}

header a.active {
    font-style: unset;
    color: #FFFFFF;
    background-color: rgba(0, 0, 0, 0.5);
    text-transform: uppercase;
}

footer {
    backdrop-filter: hue-rotate(135deg) contrast(1.1);
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    padding: 1vw 0;
    position: absolute;

}

.block h2 {
    font-size: 1.4rem;
    color: rgb(0, 0, 0);
    text-shadow: 1px 1px 8px rgb(183, 0, 255);
    text-decoration-line: underline;
    padding: 0.65104167vw 0;
    opacity: 70%;
}

section#Code {
    margin-top: 4rem;
}

section#Code img {
    width: 9.38rem;
    box-shadow: 0 0 2rem rgb(255, 196, 0);
    transition: 2s;
    transition-timing-function: ease-in-out;
}

section#Code img:hover {
    transform: rotate(720deg);
}

@keyframes gradient {
	0% {
		background-position: 0% 50%;
	}
	50% {
		background-position: 100% 50%;
	}
	100% {
		background-position: 0% 50%;
	}
}

@media screen and (max-width: 865px) {
    #About .container, footer{
        flex-direction: column;
        text-align: center;
    }
}

@media screen and (max-width: 500px) {
    /* скрыть дракона */
    #Animal pre{
        display: none;
    }
}

@media screen and (max-width: 380px) {
    #Code h2, #Code pre{
        display: none;
    }
    header a{
        font-size: 0.8em;
    }
}

.block_table .table{
    display: grid;
    width: 100%;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 60px;
    margin-bottom: 20px;
}

.block_table {
    display: none;
    align-items: center;
    justify-content: center;
}

.table_row {
    display: contents;
}

.table_item {
    text-align: center;
    font-size: 1.5rem;
    align-self: center;
    height: 3rem;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.table_row:nth-child(even) .table_item {
    background: #d0bfff7a;
}

#myElement {
    display: block;
    justify-content: center;
    font-size: 5rem;
}