/* ============================================
   ESSAY SITE STYLES
   Low entropy foundation for high entropy content
   ============================================ */

:root {
    /* Colors - muted, readable, not harsh */
    --bg: #fdfcfa;
    --bg-alt: #f7f5f2;
    --text: #1a1a1a;
    --text-muted: #666;
    --text-faint: #999;
    --accent: #2d5a6b;
    --accent-hover: #1e3d4a;
    --border: #e5e3df;
    --code-bg: #f4f2ef;

    /* Dark mode colors */
    --dark-bg: #1a1a1a;
    --dark-bg-alt: #242424;
    --dark-text: #e5e5e5;
    --dark-text-muted: #a0a0a0;
    --dark-text-faint: #707070;
    --dark-accent: #7fb3c4;
    --dark-accent-hover: #a5ccd8;
    --dark-border: #333;
    --dark-code-bg: #2a2a2a;

    /* Typography */
    --font-serif: 'Source Serif 4', Georgia, serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;

    /* Spacing */
    --content-width: 680px;
    --sidenote-width: 220px;
    --sidenote-gap: 40px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: var(--dark-bg);
        --bg-alt: var(--dark-bg-alt);
        --text: var(--dark-text);
        --text-muted: var(--dark-text-muted);
        --text-faint: var(--dark-text-faint);
        --accent: var(--dark-accent);
        --accent-hover: var(--dark-accent-hover);
        --border: var(--dark-border);
        --code-bg: var(--dark-code-bg);
    }
}

/* Manual dark mode toggle */
[data-theme="dark"] {
    --bg: var(--dark-bg);
    --bg-alt: var(--dark-bg-alt);
    --text: var(--dark-text);
    --text-muted: var(--dark-text-muted);
    --text-faint: var(--dark-text-faint);
    --accent: var(--dark-accent);
    --accent-hover: var(--dark-accent-hover);
    --border: var(--dark-border);
    --code-bg: var(--dark-code-bg);
}

[data-theme="light"] {
    --bg: #fdfcfa;
    --bg-alt: #f7f5f2;
    --text: #1a1a1a;
    --text-muted: #666;
    --text-faint: #999;
    --accent: #2d5a6b;
    --accent-hover: #1e3d4a;
    --border: #e5e3df;
    --code-bg: #f4f2ef;
}

/* ============================================
   BASE RESET & TYPOGRAPHY
   ============================================ */

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

html {
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-serif);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    transition: background var(--transition-normal), color var(--transition-normal);
}

/* ============================================
   NAVIGATION
   ============================================ */

.site-nav {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    max-width: calc(var(--content-width) + var(--sidenote-width) + var(--sidenote-gap));
    margin: 0 auto;
    padding: 2rem 1.5rem 1rem;
}

.nav-home {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav-home:hover {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--accent);
}

/* ============================================
   MAIN CONTENT CONTAINER
   ============================================ */

main {
    max-width: calc(var(--content-width) + var(--sidenote-width) + var(--sidenote-gap));
    margin: 0 auto;
    padding: 0 1.5rem 4rem;
}

/* ============================================
   HOME PAGE
   ============================================ */

.site-header {
    margin: 3rem 0 4rem;
    max-width: var(--content-width);
}

.site-header h1 {
    font-size: 2.2rem;
    font-weight: 600;
    margin: 0 0 1rem;
    line-height: 1.2;
}

.site-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin: 0;
    max-width: 540px;
}

/* Section links on home */
.site-sections {
    max-width: var(--content-width);
    margin: 0 0 3rem;
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.site-sections a {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-sections a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* Essay list */
.essays-list {
    max-width: var(--content-width);
}

.essay-preview {
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border);
}

.essay-preview:last-child {
    border-bottom: none;
}

.essay-preview a {
    text-decoration: none;
    color: inherit;
    display: block;
}

.essay-preview h2 {
    font-size: 1.4rem;
    font-weight: 600;
    margin: 0 0 0.3rem;
    line-height: 1.3;
    transition: color var(--transition-fast);
}

.essay-preview a:hover h2 {
    color: var(--accent);
}

.essay-preview time {
    font-size: 0.85rem;
    color: var(--text-faint);
    display: block;
    margin-bottom: 0.6rem;
}

.preview-text {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.95rem;
}

/* ============================================
   ESSAY PAGE
   ============================================ */

.essay {
    position: relative;
}

.essay-header {
    max-width: var(--content-width);
    margin-bottom: 3rem;
}

.essay-header h1 {
    font-size: 2.4rem;
    font-weight: 600;
    line-height: 1.2;
    margin: 0 0 0.5rem;
}

.essay-subtitle {
    font-size: 1.2rem;
    font-style: italic;
    color: var(--text-muted);
    margin: 0 0 1rem;
}

.essay-meta {
    font-size: 0.85rem;
    color: var(--text-faint);
}

/* Table of contents */
.toc {
    max-width: var(--content-width);
    margin: 2rem 0 3rem;
    padding: 1.5rem 2rem;
    background: var(--bg-alt);
    border-radius: 4px;
}

.toc-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-faint);
    margin: 0 0 1rem;
}

.toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc li {
    margin-bottom: 0.5rem;
}

.toc a {
    font-size: 0.95rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.toc a:hover {
    color: var(--accent);
}

/* Essay content */
.essay-content {
    max-width: var(--content-width);
}

.essay-content p {
    margin: 0 0 1.5rem;
    text-align: left;
    hyphens: auto;
}

.essay-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 3rem 0 1rem;
    padding-top: 1rem;
}

.essay-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    font-style: italic;
    margin: 2rem 0 0.8rem;
}

/* Links */
.essay-content a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

.essay-content a:hover {
    color: var(--accent-hover);
}

/* Blockquotes */
.essay-content blockquote {
    margin: 2rem 0;
    padding: 1.5rem 2rem;
    background: var(--bg-alt);
    border-left: 3px solid var(--border);
    font-style: italic;
}

.essay-content blockquote p {
    margin-bottom: 0;
}

.essay-content blockquote p + p {
    margin-top: 1rem;
}

/* Lists */
.essay-content ul,
.essay-content ol {
    margin: 0 0 1.5rem;
    padding-left: 1.5rem;
}

.essay-content li {
    margin-bottom: 0.5rem;
}

/* Code */
.essay-content code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--code-bg);
    padding: 0.15em 0.4em;
    border-radius: 3px;
}

.essay-content pre {
    background: var(--code-bg);
    padding: 1.5rem;
    overflow-x: auto;
    border-radius: 4px;
    margin: 1.5rem 0;
}

.essay-content pre code {
    background: none;
    padding: 0;
    font-size: 0.85rem;
    line-height: 1.5;
}

/* ============================================
   SIDENOTES (Gwern-style)
   ============================================ */

.sidenote-toggle {
    display: none;
}

.sidenote-number {
    font-size: 0.7em;
    vertical-align: super;
    color: var(--accent);
    cursor: pointer;
    counter-increment: sidenote;
}

.sidenote-number::after {
    content: counter(sidenote);
}

.sidenote {
    float: right;
    clear: right;
    width: var(--sidenote-width);
    margin-right: calc(-1 * (var(--sidenote-width) + var(--sidenote-gap)));
    margin-bottom: 1rem;
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--text-muted);
    position: relative;
}

.sidenote::before {
    content: counter(sidenote) ". ";
    font-weight: 600;
    color: var(--text-faint);
}

/* Mobile sidenotes - become inline */
@media (max-width: 1100px) {
    .sidenote {
        display: none;
        float: none;
        width: 100%;
        margin: 1rem 0;
        padding: 1rem;
        background: var(--bg-alt);
        border-radius: 4px;
    }

    .sidenote-toggle:checked + .sidenote {
        display: block;
    }

    .sidenote-number {
        color: var(--accent);
        text-decoration: underline;
        cursor: pointer;
    }
}

/* ============================================
   FOOTNOTES (fallback / end of page)
   ============================================ */

.footnotes {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
}

.footnotes ol {
    padding-left: 1.5rem;
}

.footnotes li {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

/* ============================================
   ARCHIVE PAGE
   ============================================ */

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

.archive-year {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-faint);
    margin: 2.5rem 0 1rem;
}

.archive-year:first-of-type {
    margin-top: 0;
}

.archive-item {
    display: flex;
    align-items: baseline;
    gap: 1.5rem;
    margin-bottom: 0.8rem;
}

.archive-item time {
    font-size: 0.85rem;
    color: var(--text-faint);
    font-family: var(--font-mono);
    flex-shrink: 0;
    width: 5em;
}

.archive-item a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.archive-item a:hover {
    color: var(--accent);
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
    max-width: calc(var(--content-width) + var(--sidenote-width) + var(--sidenote-gap));
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-faint);
}

.site-footer a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-footer a:hover {
    color: var(--accent);
}

/* ============================================
   THEME TOGGLE
   ============================================ */

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--accent);
}

/* ============================================
   FOOTNOTE HOVER TOOLTIPS
   ============================================ */

.fn-tooltip {
    position: absolute;
    max-width: 320px;
    padding: 0.8rem 1rem;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-muted);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
    z-index: 100;
}

.fn-tooltip.visible {
    opacity: 1;
}

/* ============================================
   SECTION DIVIDERS (dinkus)
   ============================================ */

.essay-content hr {
    border: none;
    text-align: center;
    margin: 3rem 0;
}

.essay-content hr::after {
    content: "⁂";
    color: var(--text-faint);
    font-size: 1.2rem;
    letter-spacing: 0.5em;
}

/* ============================================
   MARGINALIA PAGE
   ============================================ */

.marginalia-content blockquote {
    margin: 1.5rem 0;
    padding: 1.2rem 2rem;
}

.marginalia-content blockquote footer {
    font-size: 0.8rem;
    color: var(--text-faint);
    font-style: normal;
    margin-top: 0.8rem;
}

.marginalia-content blockquote footer::before {
    content: "— ";
}

.marginalia-content blockquote.long-quote {
    background: none;
    border-left: 3px solid var(--accent);
    font-style: normal;
}

.marginalia-content blockquote.long-quote p {
    margin-bottom: 1rem;
}

.marginalia-section h2 {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-faint);
    margin: 2rem 0 1.5rem;
    padding-top: 0;
}

/* About page definition list */
.essay-content dl {
    margin: 1.5rem 0;
}

.essay-content dt {
    font-weight: 600;
    margin-top: 1.2rem;
}

.essay-content dd {
    margin-left: 0;
    padding-left: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

/* ============================================
   UTILITIES
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Drop cap for first paragraph */
.drop-cap::first-letter {
    float: left;
    font-size: 4rem;
    line-height: 0.8;
    padding-right: 0.15em;
    margin-top: 0.1em;
    font-weight: 600;
}

/* Small caps */
.small-caps {
    font-variant: small-caps;
    letter-spacing: 0.05em;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    html {
        font-size: 17px;
    }

    .site-nav {
        padding: 1.5rem 1rem 0.5rem;
    }

    main {
        padding: 0 1rem 3rem;
    }

    .site-header h1 {
        font-size: 1.8rem;
    }

    .essay-header h1 {
        font-size: 1.9rem;
    }

    .essay-preview h2 {
        font-size: 1.2rem;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .site-nav,
    .site-footer {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }

    .sidenote {
        display: none;
    }

    a {
        color: inherit;
        text-decoration: underline;
    }
}