:root {
  --white: #fff;
  --light: #f8f9fa;
  --gray-dark: #6c757d;
  --dark: #212529;
  --font-family-sans-serif: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --font-family-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    font-family: var(--font-family-sans-serif);
    font-size: 1rem;
    font-weight: 300;
    line-height: 1.5;
    color: var(--dark);
    background-color: var(--white);
}

main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1rem;
}

header {
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--gray-dark);
    text-align: center;
}

header picture {
    height: auto;
    width: 150px;
    margin-bottom: 1rem;
}

header picture img {
    max-width: 100%;
    border-radius: 50%;
}

section {
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

article {
    margin-bottom: 1.5rem;
    text-align: center;
}

ul {
    list-style: none;
    padding-left: 0;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--dark);
    text-decoration: none;
}

a:hover,
a:focus {
    text-decoration: underline;
}

a:focus,
a:active {
    outline: none
}

footer {
    width: 100%;
    height: 40px;
    font-size: 0.9rem;
    color: var(--gray-dark);
    line-height: 40px;
    text-align: center;
}

footer p {
    margin: 0;
}

footer a {
    color: var(--gray-dark);
}

.w-100 {
    width: 100%;
}

table.pgp td+td {
    text-align: right;
}

figure {
    margin: 0 0 1rem;
}

figure.pgp {
    padding: 1rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
    background-color: var(--light);
    -ms-overflow-style: -ms-autohiding-scrollbar;
}

pre {
    overflow: auto;
}

.pgp pre {
    padding: 0;
    margin-top: 0;
    margin-bottom: 0;
    background-color: transparent;
    border: 0;
}

textarea.pgp {
    font-size: 0.813rem;
    resize: vertical;
    height: 200px;
    padding: 0.5rem;
    padding-right: 0;
    padding-bottom: 0.063rem;
    background-color: var(--light);
    border-color: var(--light);
    font-family: var(--font-family-monospace);
    color: var(--dark);
    line-height: 1.42857;
}

.dead-pixel {
    background-color: #ff00ff;
    width: 1px;
    height: 1px;
    position: fixed;
    top: 230px;
    left: 330px;
    z-index: 9999;
}

@media (min-width: 576px) {
    figure.pgp {
        padding: 1.5rem;
    }
}

@media screen and (min-width: 768px) {
    body {
        font-size: 1.2rem;
    }
    main {
        align-items: unset;
        margin-top: 6rem;
    }
    header {
        text-align: left;
    }
    header picture {
        width: 100px;
        margin-right: 1rem;
        margin-bottom: 0;
    }
    h1 {
        display: inline-block;
        font-size: 2.8rem;
    }
    section {
        margin-bottom: 0;
    }
    article {
        margin-bottom: 0;
        text-align: left;
    }
    h2 {
        font-size: 2.2rem;
        margin-bottom: 1rem;
    }
    ul {
        padding-left: inherit;
    }
    footer {
        height: 60px;
        line-height: 60px;
    }
    .dead-pixel {
        top: 210px;
    }
}

@media screen and (min-width: 1200px) and (min-height: 900px) {
    main {
        margin-top: 10rem;
    }
}

@media screen and (prefers-color-scheme: dark) {
    :root {
      --white:#212529;
      --light: #6c757d;
      --gray-dark: #f8f9fa;
      --dark:  #fff;
    }
}