@font-face {
    font-family: "ET Book";
    src: url("fonts/et-book-roman-line-figures.woff") format("woff");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "ET Book";
    src: url("fonts/et-book-italic.woff") format("woff");
    font-weight: 400;
    font-style: italic;
    font-display: swap;
}

@font-face {
    font-family: "ET Book";
    src: url("fonts/et-book-bold-line-figures.woff") format("woff");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Editor";
    src: url("fonts/editor-regular.woff2") format("woff2");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Editor";
    src: url("fonts/editor-italic.woff2") format("woff2");
    font-weight: 400;
    font-style: italic;
    font-display: swap;
}

@font-face {
    font-family: "Editor";
    src: url("fonts/editor-bold.woff2") format("woff2");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "GT America Mono";
    src: url("fonts/gt-america-mono-light.woff2") format("woff2");
    font-weight: 300;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "GT America Mono";
    src: url("fonts/gt-america-mono-bold.woff2") format("woff2");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

:root {
    --paper: #fff7f4;
    --ink: #121212;
    --ink-soft: rgba(18, 18, 18, 0.7);
    --accent: #275f4b;
    --accent-soft: #e3efe9;
    --rule: rgba(18, 18, 18, 0.15);
    --sidebar: #f7f1ea;
    --highlight: #fff3cc;
    --max-text: 1000px;
    --sidenote-width: 220px;
    --sidenote-gap: 28px;
}

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

body {
    background: var(--paper);
    color: var(--ink);
    font-family: "ET Book", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
    font-size: 1.15rem;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid rgba(18, 18, 18, 0.35);
}

a:hover {
    border-bottom-color: var(--ink);
}

.rail-progress {
    --rail-progress: 0%;
    position: relative;
    height: 6px;
    margin-bottom: 1.5rem;
}

.rail-progress-track,
.rail-progress-fill {
    position: absolute;
    left: 0;
    width: 100%;
    border-radius: 999px;
}

.rail-progress-track {
    top: 0;
    height: 100%;
    background: rgba(18, 18, 18, 0.15);
}

.rail-progress-fill {
    top: 0;
    height: 100%;
    width: var(--rail-progress);
    background: var(--ink);
}

.essay-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: "GT America Mono", monospace;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.65rem;
    padding: 1.25rem 2rem 0;
    color: var(--ink-soft);
}

.essay-shell {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2.5rem 2rem 5rem;
    display: grid;
    grid-template-columns: minmax(200px, 280px) minmax(0, var(--max-text)) minmax(220px, 260px);
    gap: 2rem;
}

.essay-rail {
    font-family: "GT America Mono", monospace;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-soft);
    position: sticky;
    top: 4.5rem;
    align-self: start;
}

.essay-notes {
    grid-column: 3;
    position: relative;
    font-size: 0.9rem;
    color: var(--ink-soft);
}

.rail-block {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--rule);
}

.rail-label {
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 0.35rem;
}

.rail-value {
    font-weight: 400;
}

.rail-toc {
    margin-top: 1.5rem;
}

.rail-toc ol {
    margin-top: 0.6rem;
    display: grid;
    gap: 0.45rem;
    list-style: none;
    padding-left: 0;
}

.rail-toc a {
    border-bottom: none;
    color: inherit;
}

.rail-toc a.active {
    font-weight: 700;
    color: var(--ink);
}

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

.essay-main {
    grid-column: 2;
}

.essay-header {
    padding-bottom: 1.8rem;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 2rem;
}

.eyebrow {
    font-family: "GT America Mono", monospace;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.65rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.essay-header h1 {
    font-family: "Editor", "ET Book", serif;
    font-size: 2.9rem;
    line-height: 1.15;
    margin-bottom: 1rem;
}

.deck {
    font-size: 1.25rem;
    color: var(--ink-soft);
    margin-bottom: 1.25rem;
}

.essay-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-family: "GT America Mono", monospace;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.65rem;
    color: var(--ink-soft);
}

.abstract {
    background: var(--sidebar);
    padding: 1.4rem 1.6rem;
    border-left: 3px solid var(--accent);
    margin-bottom: 2.5rem;
}

.abstract p {
    margin: 0;
}

.essay-section {
    margin-bottom: 3rem;
}

.essay-section h2 {
    font-family: "Editor", "ET Book", serif;
    font-size: 1.7rem;
    margin-bottom: 1.2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--rule);
}

.essay-section p {
    margin-bottom: 1.5rem;
}

.dropcap {
    float: left;
    font-family: "Editor", "ET Book", serif;
    font-size: 4.2rem;
    line-height: 0.85;
    padding-right: 0.2em;
    color: var(--accent);
}

.sidenote {
    position: relative;
}

.sidenote-number {
    font-size: 0.75rem;
    vertical-align: super;
    color: var(--accent);
}

.sidenote-number-content {
    font-size: 0.8rem;
    vertical-align: baseline;
    margin-right: 0.35rem;
}

.sidenote-content {
    font-family: "Editor", "ET Book", serif;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--ink-soft);
}

.sidenote-paragraph {
    display: block;
    margin-bottom: 0.6rem;
}

.sidenote-paragraph:last-child {
    margin-bottom: 0;
}

.sidenote-details {
    background: #fbf7f1;
    border: 1px solid var(--rule);
    padding: 0.6rem 0.7rem;
    margin: 0.4rem 0;
}

.sidenote-details summary {
    font-family: "GT America Mono", monospace;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.65rem;
    cursor: pointer;
    margin-bottom: 0.5rem;
}

.sidenote-details[open] summary {
    margin-bottom: 0.7rem;
}

.margin-note {
    position: relative;
}

.margin-note-content {
    position: absolute;
    right: calc(100% + var(--sidenote-gap));
    width: var(--sidenote-width);
    font-size: 0.9rem;
    line-height: 1.5;
    font-style: italic;
    color: var(--ink-soft);
    text-align: right;
}

.callout {
    background: var(--accent-soft);
    border-left: 4px solid var(--accent);
    padding: 1.2rem 1.4rem;
    margin: 2rem 0;
}

.callout-title {
    font-family: "GT America Mono", monospace;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.7rem;
    margin-bottom: 0.6rem;
}

.essay-figure {
    margin: 2rem 0;
}

.essay-figure figcaption {
    font-size: 0.9rem;
    color: var(--ink-soft);
    margin-top: 0.75rem;
}

blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1.2rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--ink-soft);
}

.quote-source {
    display: block;
    font-family: "GT America Mono", monospace;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 0.8rem;
    color: var(--ink);
}

.essay-details {
    background: #fbf7f1;
    border: 1px solid var(--rule);
    padding: 1.2rem 1.4rem;
    margin: 2rem 0;
}

.essay-details summary {
    font-family: "GT America Mono", monospace;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.7rem;
    margin-bottom: 0.8rem;
    cursor: pointer;
}

.essay-details ol {
    margin-left: 1.4rem;
}

/* ===========================================
   Essay Content Spacing
   =========================================== */

.essay-content p {
    margin-bottom: 1.5rem;
}

.essay-content h2 {
    font-family: "Editor", "ET Book", serif;
    font-size: 1.7rem;
    margin-top: 3rem;
    margin-bottom: 1.2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--rule);
}

.essay-content h3 {
    font-family: "Editor", "ET Book", serif;
    font-size: 1.35rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.essay-content h2:first-child,
.essay-content h3:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

/* Remove h2 border when it follows an hr (avoid double lines) */
.essay-content hr + h2 {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

/* Figures and images */
.essay-content figure {
    margin: 2.5rem 0;
}

.essay-content figure img {
    display: block;
    max-width: 100%;
    margin: 0;
}

.essay-content figcaption {
    font-size: 0.85rem;
    color: var(--ink-soft);
    margin-top: 8px;
    line-height: 1.4;
    text-align: center;
}

/* Consecutive figures: tighter spacing */
.essay-content figure + figure {
    margin-top: 1.5rem;
}

/* Standalone images (not in figures) */
.essay-content img {
    margin: 2.5rem 0;
}

/* Horizontal rules */
.essay-content hr {
    border: none;
    border-top: 1px solid var(--rule);
    margin: 3rem 0;
}

/* Blockquotes */
.essay-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1.2rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--ink-soft);
}

.essay-content blockquote p {
    margin-bottom: 0.75rem;
}

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

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

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

/* Footnotes */
.essay-content .footnote {
    font-size: 0.85rem;
    color: var(--ink-soft);
}

.essay-content sup {
    font-size: 0.75rem;
    color: var(--accent);
}

.essay-content .footnote-ref {
    border-bottom: none;
}

/* ===========================================
   Essay Footer
   =========================================== */

.essay-footer {
    border-top: 1px solid var(--rule);
    padding-top: 2rem;
    margin-top: 3rem;
    display: grid;
    gap: 1.5rem;
}

.next-card {
    background: #fffaf2;
    padding: 1.4rem;
    border: 1px solid var(--rule);
}

.next-card h3 {
    font-family: "Editor", "ET Book", serif;
    font-size: 1.4rem;
    margin-bottom: 0.6rem;
}

.footer-meta {
    font-family: "GT America Mono", monospace;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.65rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 1200px) {
    .essay-shell {
        grid-template-columns: minmax(160px, 220px) minmax(0, var(--max-text));
    }

    .essay-notes {
        display: none;
    }

    .sidenote-content,
    .margin-note-content {
        position: relative;
        left: 0;
        right: 0;
        width: 100%;
        background: #fbf6ef;
        padding: 0.8rem 1rem;
        margin: 0.8rem 0 0;
        text-align: left;
    }

    .margin-note-content {
        font-style: italic;
    }
}

@media (max-width: 900px) {
    .essay-shell {
        grid-template-columns: 1fr;
    }

    .essay-rail {
        position: static;
        order: -1;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem;
        margin-bottom: 2rem;
        padding: 1.5rem;
        background: #fffaf4;
        border: 1px solid var(--rule);
    }

    .rail-progress {
        grid-column: 1 / -1;
        margin-bottom: 0.5rem;
    }

    .rail-toc {
        grid-column: 1 / -1;
    }

    .essay-main {
        grid-column: 1;
    }
}

@media (max-width: 600px) {
    body {
        font-size: 1.05rem;
    }

    .essay-topbar {
        padding: 1rem 1.25rem 0;
    }

    .essay-shell {
        padding: 1.5rem 1.25rem 4rem;
    }

    .essay-header h1 {
        font-size: 2.2rem;
    }

    .dropcap {
        font-size: 3.4rem;
    }
}