:root {
    --font-body: Georgia, "Times New Roman", serif;
    --font-ui: Arial, Helvetica, sans-serif;

    --color-background: #ffffff;
    --color-surface: #f6f6f3;
    --color-text: #1f1f1f;
    --color-muted: #666666;
    --color-border: #d9d9d4;
    --color-link: #174a7e;
    --color-link-hover: #0f3154;
    --color-accent: #8a6d3b;

    --max-width: 1120px;
    --content-width: 760px;

    --space-xs: 0.35rem;
    --space-sm: 0.75rem;
    --space-md: 1.25rem;
    --space-lg: 2rem;
    --space-xl: 3.5rem;

    --radius: 4px;
}

/* Reset */

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--color-background);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.7;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--color-link);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.15em;
}

a:hover,
a:focus {
    color: var(--color-link-hover);
}

.container {
    width: min(calc(100% - 2rem), var(--max-width));
    margin-inline: auto;
}

/* Accessibility */

.skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
}

.skip-link:focus {
    left: 1rem;
    top: 1rem;
    z-index: 1000;
    padding: 0.75rem 1rem;
    background: #000;
    color: #fff;
    font-family: var(--font-ui);
}

/* Header */

.site-header {
    border-bottom: 1px solid var(--color-border);
    background: var(--color-background);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    padding-block: 1.25rem;
}

.site-brand {
    display: flex;
    flex-direction: column;
    color: var(--color-text);
    text-decoration: none;
}

.site-title {
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1.2;
}

.site-tagline {
    margin-top: 0.2rem;
    color: var(--color-muted);
    font-size: 0.9rem;
    font-family: var(--font-ui);
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-family: var(--font-ui);
    font-size: 0.95rem;
}

.site-nav a {
    color: var(--color-text);
    text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus {
    color: var(--color-link);
}

/* Main */

.site-main {
    padding-block: var(--space-xl);
}

.site-main > .container {
    min-height: 55vh;
}

.content {
    max-width: var(--content-width);
}

h1,
h2,
h3,
h4 {
    line-height: 1.25;
    margin-top: 1.7em;
    margin-bottom: 0.6em;
}

h1 {
    margin-top: 0;
    font-size: clamp(2rem, 5vw, 3.2rem);
}

h2 {
    font-size: 1.65rem;
}

h3 {
    font-size: 1.3rem;
}

p {
    margin-block: 0 1.25rem;
}

ul,
ol {
    padding-left: 1.5rem;
}

blockquote {
    margin: var(--space-lg) 0;
    padding-left: 1.25rem;
    border-left: 4px solid var(--color-border);
    color: var(--color-muted);
}

hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin-block: var(--space-xl);
}

/* Metadata */

.page-meta,
.publication-meta {
    margin-bottom: var(--space-lg);
    color: var(--color-muted);
    font-family: var(--font-ui);
    font-size: 0.9rem;
}

.publication-meta dl {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 0.35rem 1rem;
}

.publication-meta dt {
    font-weight: 700;
}

.publication-meta dd {
    margin: 0;
}

/* Cards */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.card {
    padding: 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-background);
}

.card h2,
.card h3 {
    margin-top: 0;
}

.card p:last-child {
    margin-bottom: 0;
}

/* Download buttons */

.downloads {
    margin-block: var(--space-lg);
    padding: 1.25rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
}

.downloads h2,
.downloads h3 {
    margin-top: 0;
}

.download-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.button,
.download-button {
    display: inline-block;
    padding: 0.65rem 1rem;
    border: 1px solid var(--color-link);
    border-radius: var(--radius);
    background: var(--color-link);
    color: #fff;
    font-family: var(--font-ui);
    font-size: 0.95rem;
    text-decoration: none;
}

.button:hover,
.button:focus,
.download-button:hover,
.download-button:focus {
    background: var(--color-link-hover);
    color: #fff;
}

/* Search */

.search-form {
    display: flex;
    gap: 0.5rem;
    margin-bottom: var(--space-lg);
}

.search-form input[type="search"] {
    flex: 1;
    min-width: 0;
    padding: 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font: inherit;
}

/* Tables */

table {
    width: 100%;
    border-collapse: collapse;
    margin-block: var(--space-lg);
}

th,
td {
    padding: 0.65rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    vertical-align: top;
}

th {
    font-family: var(--font-ui);
}

/* Footer */

.site-footer {
    margin-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-lg);
    padding-block: var(--space-lg);
}

.site-footer nav {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-family: var(--font-ui);
    font-size: 0.9rem;
}

.site-footer nav a {
    text-decoration: none;
}

.footer-meta {
    grid-column: 1 / -1;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-family: var(--font-ui);
    font-size: 0.85rem;
}

/* Code */

code,
pre {
    font-family: "Courier New", Courier, monospace;
}

code {
    padding: 0.1rem 0.3rem;
    background: var(--color-surface);
}

pre {
    overflow-x: auto;
    padding: 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

pre code {
    padding: 0;
}

/* Responsive */

@media (max-width: 760px) {
    body {
        font-size: 17px;
    }

    .header-inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .site-nav {
        gap: 0.75rem;
    }

    .footer-inner {
        grid-template-columns: 1fr;
    }

    .footer-meta {
        grid-column: 1;
    }

    .publication-meta dl {
        grid-template-columns: 1fr;
    }
}