:root {
    --text: darkslategrey;
    --border: lightgrey;
    --accent: rgb(0, 109, 128);
    --bg: #dce3e1;
    --gradientTop: white;
    --gradientBottom: rgb(240, 248, 255, .8);
}

@font-face {
    font-family: "DOS"; 
    src: url('../fonts/Px437_DOS-V_re_ANK24.ttf') format('truetype');
}

* { 
    box-sizing: border-box;
}

body {
    padding: 15px;
    font-family: "DOS", "Courier New", Courier, monospace;
    font-smooth: never;
    -webkit-font-smoothing: none;
    -moz-font-smoothing: greyscale;
    color: var(--text);
    background: url('../../images/snow_tree_dither.png'); 
    background-size: 50%;
}

p {
    padding: 0 0 10px 0;
}

.container {
    max-width: 55rem;
    margin: 5vw auto 12px auto;
    outline-offset: 4px;
    border-radius: 10px;
    display: flex;
    flex-wrap: wrap;
    padding: 5px;
    gap: 5px;
    background-color: var(--gradientBottom);
}

.small { flex: 0.5 0.1 9%; }
.large { flex: 1 1 82%; }
.full { flex: 1 1 100%; }

header {
    background: linear-gradient(135deg, #e0f0ff 0%, #c8e0f0 100%);
    width: 100%;
    height: 100px;
    border: 2px ridge var(--border);
    border-radius: 5px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

header span {
    font-size: 2rem;
    font-weight: bold;
    text-shadow: 2px 2px var(--accent),
        -1px 1px var(--text);
    color: var(--gradientTop);
}

nav {
    border: 2px ridge var(--border);
    border-radius: 5px;
    padding: 5px;
    background: linear-gradient(var(--gradientTop),var(--gradientBottom));
}

nav div {
    text-align: center;
    font-size: 1.25rem;
    margin: 5px 5px 10px 5px;
}

nav a {
    display: block;
    margin: 5px;
    background: linear-gradient(to right,var(--bg),var(--gradientBottom));
    border-radius: 5px;
    padding: 2px 7px;
    text-decoration: none;
}

nav a:link, nav a:visited { 
    color: var(--text);
}

nav a:hover, nav a:focus {
    background: linear-gradient(to right,var(--bg), var(--gradientBottom), var(--gradientTop));
    font-style: italic;
}

section {
    border: 2px ridge var(--border);
    border-radius: 5px;
    background: linear-gradient(var(--gradientTop),var(--gradientBottom));
    padding: 10px;
}

footer {
    text-align: center;
    margin-bottom: 5vw;
    font-size: 0.8rem;
    background-color: rgba(240, 248, 255, .8);
    width: fit-content;
    margin: auto;
    border-radius: 5px;
    padding: 5px 10px;
}

h1, h2, h3, h4, p { 
    margin: 5px;
    line-height: 1.4;
}

h1 { 
    font-size: 1.4rem;
    letter-spacing: 2px;
    font-weight: normal;
    text-align: center;
}

h2 { 
    font-size: 1.1rem;
    font-weight: bold;
    margin-top: 10px;
    color: var(--accent);
}

img { max-width: 100%; }

a:hover, a:focus {
    font-style: italic;
}

ul {
    margin-left: 20px;
    line-height: 1.6;
}

code {
    background: rgba(0, 0, 0, 0.1);
    padding: 2px 6px;
    border-radius: 3px;
}