/*
 * NONZERO LAB
 */

@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,400&display=swap');

:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-link: #1a4d8f;
    --color-border: #e0e0e0;
    --font-display: 'Lora', Georgia, 'Times New Roman', serif;
    --font-body: 'Source Serif 4', Georgia, 'Times New Roman', serif;
    --max-width: 680px;
}

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

body {
    font-family: var(--font-body);
    font-size: 19px;
    line-height: 1.75;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    padding: 3rem 1.5rem;
    -webkit-font-smoothing: antialiased;
}

/* ═══════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════ */

header, main, footer {
    max-width: var(--max-width);
    margin: 0 auto;
}

header {
    margin-bottom: 2.5rem;
}

main {
    min-height: 70vh;
}

footer {
    margin-top: 5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 14px;
    letter-spacing: 0.03em;
}

/* ═══════════════════════════════════════════
   TYPOGRAPHY
   ═══════════════════════════════════════════ */

h1 {
    font-family: var(--font-display);
    font-size: 38px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5em;
    letter-spacing: -0.01em;
}

h2 {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.5em;
}

h3 {
    font-family: var(--font-display);
    font-size: 21px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 0.4em;
}

p {
    margin-bottom: 1em;
}

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

a:hover {
    text-decoration: underline;
}

/* ═══════════════════════════════════════════
   HORIZONTAL RULES
   ═══════════════════════════════════════════ */

.thick-rule {
    border: none;
    border-top: 2px solid var(--color-text);
    margin: 2.5rem 0;
}

/* ═══════════════════════════════════════════
   INDEX PAGE
   ═══════════════════════════════════════════ */

.site-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--color-text);
}

.site-title {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.02em;
    margin-bottom: 0;
}

.site-intro {
    margin-bottom: 2.5rem;
    font-size: 18px;
}

.section-header {
    font-family: var(--font-display);
    font-size: 30px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.3em;
    margin-top: 0;
    letter-spacing: -0.01em;
}

.section-desc {
    font-size: 17px;
    margin-bottom: 1.5em;
    font-style: italic;
}

.doc-entry {
    margin-bottom: 1.75em;
    padding-bottom: 1.75em;
    border-bottom: 1px solid var(--color-border);
}

.doc-list .doc-entry:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.doc-title {
    margin-bottom: 0.2em;
}

.doc-title a {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 500;
    color: var(--color-text);
}

.doc-title a:hover {
    color: var(--color-link);
}

.doc-desc {
    margin-bottom: 0.4em;
    font-size: 17px;
}

.doc-links {
    font-size: 14px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.doc-links a {
    color: var(--color-link);
}

.doc-date {
    font-size: 14px;
    margin-top: 0.3em;
    font-style: italic;
}

.corpus-note {
    margin-top: 0;
    font-size: 18px;
    padding-top: 0;
}

.changelog {
    font-size: 15px;
}

.changelog-entry {
    margin-bottom: 0.5em;
}

.version-tag {
    display: block;
    text-align: right;
    margin-top: 2em;
    font-size: 14px;
    letter-spacing: 0.03em;
}

/* ═══════════════════════════════════════════
   PAGE TEMPLATE (individual docs)
   ═══════════════════════════════════════════ */

.page-nav {
    margin-bottom: 2.5em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.page-nav a {
    color: var(--color-text);
}

.page-nav a:hover {
    color: var(--color-link);
}

.page-header {
    margin-bottom: 2.5em;
    padding-bottom: 1.5em;
    border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
    font-family: var(--font-display);
    font-size: 40px;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.01em;
}

.page-date {
    font-size: 15px;
    margin-top: 0.5em;
    font-style: italic;
}

.page-content h2 {
    margin-top: 2.5em;
    padding-top: 1.5em;
    border-top: 1px solid var(--color-border);
}

.page-content h2:first-child {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

/* When an hr immediately precedes an h2, hide it to avoid double dividers */
.page-content hr + h2 {
    border-top: none;
    padding-top: 0;
}

.page-content h3 {
    margin-top: 1.75em;
}

.page-content ul, .page-content ol {
    margin-left: 1.5em;
    margin-bottom: 1em;
}

.page-content li {
    margin-bottom: 0.4em;
}

.page-content blockquote {
    border-left: 3px solid var(--color-border);
    padding-left: 1.25em;
    margin: 1.5em 0;
    font-style: italic;
}

.page-content code {
    font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
    background: #f6f6f6;
    padding: 0.15em 0.35em;
    font-size: 15px;
    border-radius: 3px;
}

.page-content pre {
    background: #f6f6f6;
    padding: 1.25em;
    overflow-x: auto;
    margin: 1.5em 0;
    border: 1px solid var(--color-border);
    border-radius: 3px;
    font-size: 15px;
    line-height: 1.5;
}

.page-content pre code {
    background: none;
    padding: 0;
    border-radius: 0;
}

.page-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 17px;
}

.page-content th, .page-content td {
    border-bottom: 1px solid var(--color-border);
    padding: 0.6em 0.75em;
    text-align: left;
}

.page-content th {
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 2px solid var(--color-text);
}

.page-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 2.5em 0;
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */

@media (max-width: 600px) {
    body {
        padding: 1.5rem 1rem;
        font-size: 17px;
    }

    .site-title {
        font-size: 36px;
    }

    .page-header h1 {
        font-size: 30px;
    }

    .section-header {
        font-size: 24px;
    }

    .page-content pre {
        font-size: 13px;
    }
}