* {
    box-sizing: border-box;
}

:root {
    --dark: rgba(2, 0, 36, 1);
    --medium: rgba(9, 9, 121, 1);
    --light: rgba(0, 212, 255, 1);
    --rounding: 7px;
    --max-width: 800px;
}

html, body {
    min-height: 100%;
}

html {
    padding: 20px;
}

body {
    font-family: sans-serif;
    font-size: 16px;
    
    line-height: 1.4;
    background-color: black;
  
    background:
        linear-gradient(
            170deg,
            var(--dark) 63%,
            var(--medium) 81%,
            var(--light) 100%
        );
    background-attachment: fixed;

    max-width: var(--max-width);
    margin: auto;
}

b {
    font-weight: bold;
}

i { 
    font-style: italic;
}

.block {
    background-color: white;
    margin-bottom: 20px;
    border-radius: var(--rounding);
    padding: 20px;
}

.block:last-child {
    margin-bottom: 0;
}

.block > *:last-child {
    margin-bottom: 0;
}

.block img {
    border-radius: var(--rounding);
}

h1, h2, p {
    margin-bottom: 10px;
}

h1 {
    font-weight: bold;
    font-size: 1.5em;
    color: var(--medium);
}

h2 {
    font-weight: bold;
    font-size: 1.3em;
    color: var(--medium);
}

.header {
    text-align: center;
}

.header h1 a {
    color: inherit;
    text-decoration: none;
}

.header h1 a:hover {
    text-decoration: underline;
}

.header img {
    border-radius: 50%;
}

.navigation a {
    /* border: 1px solid black; */
    background-color: var(--medium);
    color: white;
    border-radius: var(--rounding);
    padding: 5px 10px;
    text-decoration: none;
}

.navigation a:hover {
    text-decoration: underline;
}

li {
    margin-bottom: 10px;
}

.row {
    display: flex;
    margin-bottom: 20px;
    gap: 20px;
    justify-content: space-between;
}

.row > * {
    flex: 1;
    margin: 0;
}

.center {
    text-align: center;
}