@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,500;1,9..144,300;1,9..144,400&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --paper: #F7F5F0;
  --ink: #1A1815;
  --ink-soft: #4A4641;
  --rule: #D8D4CB;
  --blush: #EFD9D8;
  --mint: #C8E6D6;
}

[data-theme="dark"] {
  --paper: #14120F;
  --ink: #F2EFE8;
  --ink-soft: #B8B2A7;
  --rule: #2C2925;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.005em;
  font-feature-settings: 'ss01', 'cv11';
  transition: background-color 0.4s ease, color 0.4s ease;
}

::selection { background: var(--ink); color: var(--paper); }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
hr.rule { height: 1px; border: 0; background: var(--rule); margin: 0; }
ul { list-style: none; padding: 0; margin: 0; }

h1, h2, h3, h4, h5, h6 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 400;
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.hero {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 0.95;
  color: var(--ink);
}
.hero-italic { font-style: italic; font-weight: 300; }

.text { color: var(--ink-soft); font-size: 16px; line-height: 1.7; }
.text-ink { color: var(--ink); }

.label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 11px;
  color: var(--ink-soft);
}

.nav-link {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: var(--ink);
  opacity: 0.6;
  transition: opacity 0.4s ease;
}
.nav-link:hover, .nav-link.active { opacity: 1; }

.link-underline { position: relative; display: inline-block; }
.link-underline::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right center;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.link-underline:hover::after { transform: scaleX(1); transform-origin: left center; }

/* ——— layout ——— */
.wrap { max-width: 1024px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 768px; margin: 0 auto; padding: 0 24px; }
.wrap-mid { max-width: 896px; margin: 0 auto; padding: 0 24px; }
@media (min-width: 768px) { .wrap, .wrap-narrow, .wrap-mid { padding: 0 48px; } }
@media (min-width: 1024px) { .wrap, .wrap-narrow, .wrap-mid { padding: 0 80px; } }

/* ——— navbar ——— */
.nav {
  padding: 24px 0;
}
@media (min-width: 768px) { .nav { padding: 32px 0; } }
.nav-row {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.nav-logo { font-size: 11px; letter-spacing: 0.2em; transition: opacity 0.3s ease; }
.nav-logo:hover { opacity: 0.6; }
.nav-links { display: none; align-items: center; gap: 40px; }
@media (min-width: 768px) { .nav-links { display: flex; } }
.nav-mobile-bar { display: flex; align-items: center; gap: 12px; }
@media (min-width: 768px) { .nav-mobile-bar { display: none; } }

.icon-btn {
  width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px; transition: background-color 0.3s ease;
}
.icon-btn:hover { background: var(--rule); }
.icon-btn svg { width: 16px; height: 16px; }

/* ——— mobile menu overlay ——— */
.mobile-menu {
  position: fixed; inset: 0; background: var(--paper); z-index: 50;
  display: none; flex-direction: column; padding: 32px 24px;
}
.mobile-menu.open { display: flex; }
.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; }
.mobile-menu-list { margin-top: 64px; display: flex; flex-direction: column; gap: 24px; }
.mobile-menu-list a {
  font-family: 'Fraunces', serif; font-size: 36px; font-weight: 300;
  letter-spacing: -0.025em; color: var(--ink);
}

/* ——— hero meta strip ——— */
.meta-strip {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 96px;
}
@media (min-width: 768px) { .meta-strip { margin-bottom: 144px; } }
.dot { display: inline-block; width: 6px; height: 6px; background: var(--ink); border-radius: 999px; margin-right: 8px; vertical-align: middle; }

/* ——— home hero ——— */
.home-hero {
  font-size: clamp(48px, 13vw, 96px); line-height: 0.95; letter-spacing: -0.04em;
  word-break: keep-all; overflow-wrap: normal;
}
@media (min-width: 768px) { .home-hero { font-size: clamp(72px, 11vw, 128px); line-height: 0.92; } }
@media (min-width: 1024px) { .home-hero { font-size: clamp(96px, 9vw, 144px); line-height: 0.9; } }

.tagline {
  margin-top: 48px; max-width: 36rem; font-size: 18px; color: var(--ink); line-height: 1.7;
}
@media (min-width: 768px) { .tagline { margin-top: 64px; font-size: 20px; } }

.rotator {
  position: relative; display: inline-block; vertical-align: baseline;
  white-space: nowrap; max-width: 100%;
}
.rotator .invisible { visibility: hidden; white-space: nowrap; }
.rotator span.word {
  position: absolute; left: 0; top: 0; opacity: 0; transform: translateY(8px);
  white-space: nowrap;
  font-family: 'Fraunces', serif; font-style: italic; font-weight: 400;
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.rotator span.word.active { opacity: 1; transform: translateY(0); }

/* ——— index list (home sections, projects, writings, research items) ——— */
.index-list { border-top: 0; }
.index-list li {
  border-bottom: 1px solid var(--rule);
}
.index-row {
  display: grid; grid-template-columns: 2rem 1fr auto; gap: 24px;
  padding: 24px 0; align-items: baseline;
  transition: padding 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
@media (min-width: 768px) {
  .index-row { grid-template-columns: 2.5rem 1fr auto auto; gap: 40px; padding: 32px 0; }
}
.index-row:hover { padding-left: 16px; }
.index-row .num {
  font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-soft);
}
.index-row .name {
  font-family: 'Fraunces', serif; font-weight: 300; letter-spacing: -0.025em;
  font-size: 28px; line-height: 1;
}
@media (min-width: 768px) { .index-row .name { font-size: 48px; } }
.index-row .meta {
  font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-soft);
  opacity: 0; transition: opacity 0.5s ease;
  display: none;
}
@media (min-width: 768px) { .index-row .meta { display: inline; } }
.index-row:hover .meta { opacity: 1; }
.index-row .arrow {
  font-family: 'Fraunces', serif; font-weight: 300; font-size: 24px;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
@media (min-width: 768px) { .index-row .arrow { font-size: 28px; } }
.index-row:hover .arrow { transform: translateX(8px); }

/* ——— page header ——— */
.page-head { margin-bottom: 80px; }
.page-head .meta-bar {
  display: flex; align-items: baseline; gap: 24px; margin-bottom: 40px;
}
.page-head .meta-bar .label { white-space: nowrap; }
.page-head h1 {
  font-family: 'Fraunces', serif; font-weight: 300; letter-spacing: -0.025em;
  font-size: 60px; line-height: 1.05;
}
@media (min-width: 768px) { .page-head h1 { font-size: 96px; } }
.page-head .sub { margin-top: 32px; max-width: 36rem; font-size: 18px; color: var(--ink-soft); }

/* ——— section heading ——— */
.section { margin-top: 0; margin-bottom: 96px; }
.section-head {
  display: flex; align-items: baseline; gap: 24px; margin-bottom: 40px;
}

/* ——— drop cap ——— */
.drop-cap::first-letter {
  font-family: 'Fraunces', serif; font-weight: 400; font-size: 4.5em; line-height: 0.85;
  float: left; margin: 0.08em 0.12em 0 0; color: var(--ink);
}

/* ——— year column rows (about milestones, research pubs) ——— */
.row-year {
  display: grid; grid-template-columns: 5rem 1fr; gap: 24px; padding: 24px 0;
  border-bottom: 1px solid var(--rule);
}
.row-year .yr {
  font-family: 'Fraunces', serif; font-style: italic; font-weight: 300; font-size: 20px; padding-top: 4px;
}
.row-year .title {
  font-family: 'Fraunces', serif; font-weight: 400; font-size: 24px; margin-bottom: 8px;
  letter-spacing: -0.02em;
}

/* ——— project / writings index variants ——— */
.idx-row {
  display: grid; grid-template-columns: 3rem 1fr auto; gap: 24px; align-items: baseline;
  padding: 28px 0; border-bottom: 1px solid var(--rule);
  transition: padding 0.5s ease, opacity 0.5s ease;
}
.idx-row:hover { padding-left: 12px; }
.idx-row .num { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-soft); }
.idx-row .h {
  font-family: 'Fraunces', serif; font-weight: 300; font-size: 22px; line-height: 1.2;
  letter-spacing: -0.025em;
}
@media (min-width: 768px) { .idx-row .h { font-size: 32px; } }
.idx-row .tag {
  font-family: 'Fraunces', serif; font-style: italic; font-size: 14px; color: var(--ink-soft);
  white-space: nowrap;
}

.idx-row .reveal {
  height: 0; overflow: hidden; opacity: 0;
  transition: opacity 0.4s ease;
}
.idx-row.open .reveal { height: auto; opacity: 1; padding-top: 16px; }
.idx-row.dim { opacity: 0.35; }
.reveal .desc { font-size: 15px; color: var(--ink-soft); max-width: 42rem; }
.reveal .tech { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 16px; }
.reveal .tech span { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-soft); }
.reveal .links { margin-top: 16px; display: flex; gap: 24px; }
.reveal .links a { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-soft); display: inline-flex; align-items: center; gap: 6px; }

/* writings rows */
.writing-row {
  display: grid; grid-template-columns: 5rem 1fr; gap: 24px; align-items: baseline;
  padding: 28px 0; border-bottom: 1px solid var(--rule);
  transition: padding 0.5s ease;
}
@media (min-width: 768px) {
  .writing-row { grid-template-columns: 7rem 1fr 8rem; }
}
.writing-row:hover { padding-left: 12px; }
.writing-row .date {
  font-family: 'Fraunces', serif; font-style: italic; font-weight: 300; font-size: 16px;
}
.writing-row .h { font-family: 'Fraunces', serif; font-weight: 300; font-size: 24px; line-height: 1.2; letter-spacing: -0.025em; }
@media (min-width: 768px) { .writing-row .h { font-size: 28px; } }
.writing-row .cat { display: none; text-align: right; font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-soft); }
@media (min-width: 768px) { .writing-row .cat { display: inline; } }

/* statistics inline */
.stats { display: flex; flex-wrap: wrap; align-items: baseline; gap: 24px 48px; margin-bottom: 96px; }
.stats .n { font-family: 'Fraunces', serif; font-style: italic; font-weight: 300; font-size: 48px; }
@media (min-width: 768px) { .stats .n { font-size: 64px; } }

/* filters */
.filters { display: flex; flex-wrap: wrap; gap: 4px 24px; margin-bottom: 56px; }
.filter-btn {
  font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-soft); opacity: 0.5;
  transition: opacity 0.3s ease;
  position: relative;
}
.filter-btn::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right center;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.filter-btn:hover::after { transform: scaleX(1); transform-origin: left center; }
.filter-btn.active { opacity: 1; }
.filter-btn.active::after { transform: scaleX(1); }

/* footer */
.footer { padding: 40px 0 56px; }
.footer-row {
  display: flex; flex-direction: column; gap: 24px;
  align-items: flex-start; justify-content: space-between;
}
@media (min-width: 768px) { .footer-row { flex-direction: row; align-items: center; } }
.footer .mono-links { display: flex; gap: 24px; }
.footer .signoff {
  font-family: 'Fraunces', serif; font-style: italic; font-weight: 300; font-size: 24px;
}

/* about — leadership/lang lists */
.lead-list { display: flex; flex-direction: column; gap: 32px; }
.lead-list .h { font-family: 'Fraunces', serif; font-weight: 300; font-size: 24px; margin-bottom: 4px; letter-spacing: -0.025em; }
.tools-flow { font-family: 'Fraunces', serif; font-weight: 300; font-size: 24px; line-height: 1.5; }
@media (min-width: 768px) { .tools-flow { font-size: 28px; } }
.tools-flow .sep { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.18em; color: var(--ink-soft); margin: 0 12px; vertical-align: middle; }

/* research areas / awards rows */
.split-row {
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: baseline;
  padding: 16px 0; border-bottom: 1px solid var(--rule);
}
.split-row .h { font-family: 'Fraunces', serif; font-weight: 300; font-size: 18px; letter-spacing: -0.02em; }
@media (min-width: 768px) { .split-row .h { font-size: 20px; } }
.split-row .meta { text-align: right; max-width: 60%; }

/* generic spacer */
.mt-2 { margin-top: 8px; } .mt-3 { margin-top: 12px; } .mt-4 { margin-top: 16px; } .mt-6 { margin-top: 24px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ——— premium essay reader and interactive visualizations ——— */

.fade-transition {
  opacity: 1;
  transition: opacity 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.fade-transition.hidden {
  opacity: 0;
  pointer-events: none;
  display: none !important;
}

.essay-body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ink);
  margin-top: 40px;
}
@media (min-width: 768px) {
  .essay-body { font-size: 17.5px; }
}

.essay-body p {
  margin-top: 0;
  margin-bottom: 28px;
  text-align: justify;
}

.essay-body h2 {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: 28px;
  margin-top: 56px;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
@media (min-width: 768px) {
  .essay-body h2 { font-size: 36px; }
}

.essay-body h3 {
  font-family: 'Fraunces', serif;
  font-weight: 400;
  font-style: italic;
  font-size: 20px;
  margin-top: 36px;
  margin-bottom: 16px;
}

.essay-body blockquote {
  border-left: 2px solid var(--ink);
  margin: 32px 0;
  padding: 8px 0 8px 24px;
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-size: 19px;
  color: var(--ink-soft);
}

.essay-body code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px;
  background: var(--rule);
  padding: 2px 6px;
  border-radius: 3px;
  opacity: 0.85;
}

.essay-body pre {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 20px;
  border-radius: 4px;
  overflow-x: auto;
  margin: 32px 0;
}
.essay-body pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.6;
  opacity: 1;
}

.essay-body ul, .essay-body ol {
  margin-top: 0;
  margin-bottom: 28px;
  padding-left: 24px;
}
.essay-body ul { list-style: disc; }
.essay-body ol { list-style: decimal; }
.essay-body li { margin-bottom: 12px; }

/* back button */
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 48px;
  transition: color 0.3s ease, transform 0.3s ease;
}
.btn-back:hover {
  color: var(--ink);
  transform: translateX(-4px);
}

/* visualization container */
.writing-viz {
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
  margin: 48px 0;
  padding: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.015);
}
[data-theme="dark"] .writing-viz {
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.viz-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 10px;
  margin: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.viz-canvas-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: rgba(0,0,0,0.01);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}
[data-theme="dark"] .viz-canvas-container {
  background: rgba(255,255,255,0.01);
}

.viz-canvas-container canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* custom UI controls inside visualizations */
.viz-controls {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px 24px;
  font-family: 'Inter', sans-serif;
}
@media (min-width: 768px) {
  .viz-controls {
    grid-template-columns: repeat(2, 1fr);
  }
  .viz-controls.full-width {
    grid-template-columns: 1fr;
  }
}

.viz-control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.viz-label {
  display: flex;
  justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.viz-label span.value {
  color: var(--ink);
  font-weight: 500;
}

/* custom minimal range input styling */
.viz-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: var(--rule);
  outline: none;
  margin: 12px 0;
  transition: background 0.3s;
}
.viz-slider:hover {
  background: var(--ink-soft);
}
.viz-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 99px;
  background: var(--ink);
  cursor: pointer;
  transition: transform 0.15s cubic-bezier(0.22, 1, 0.36, 1);
}
.viz-slider::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}
.viz-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: 0;
  border-radius: 99px;
  background: var(--ink);
  cursor: pointer;
  transition: transform 0.15s cubic-bezier(0.22, 1, 0.36, 1);
}
.viz-slider::-moz-range-thumb:hover {
  transform: scale(1.3);
}

/* viz button and select */
.viz-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--ink);
  background: none;
  padding: 8px 16px;
  border-radius: 3px;
  transition: background-color 0.3s, color 0.3s;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.viz-btn:hover {
  background: var(--ink);
  color: var(--paper);
}

.viz-select {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--rule);
  background: var(--paper);
  padding: 6px 12px;
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}
.viz-select:focus {
  border-color: var(--ink);
}

/* data display fields */
.viz-stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  border-top: 1px solid var(--rule);
  padding-top: 12px;
}
.viz-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.viz-stat .val {
  font-size: 16px;
  font-family: 'Fraunces', serif;
  font-style: italic;
  color: var(--ink);
}

/* custom structures for specific visualizations */
/* Complexity scale visualizer Headings */
.complexity-grid-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 768px) {
  .complexity-grid-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

.complexity-grid {
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: rgba(0,0,0,0.005);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.complexity-grid h4 {
  margin-top: 0;
  margin-bottom: 12px;
}

.grid-matrix-canvas {
  width: 100%;
  aspect-ratio: 1;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 2px;
}

/* equation styles */
.math-block {
  overflow-x: auto;
  padding: 12px 0;
  margin: 24px 0;
  text-align: center;
}

.math-inline {
  display: inline-block;
  padding: 0 2px;
}

/* ——— Table of Contents Sidebar ——— */
.wrap-essay-detail {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (min-width: 768px) { .wrap-essay-detail { padding: 0 48px; } }
@media (min-width: 1024px) { .wrap-essay-detail { padding: 0 80px; } }

.essay-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  position: relative;
}

@media (min-width: 1024px) {
  .essay-layout {
    grid-template-columns: 180px 700px;
    gap: 48px;
    justify-content: center;
  }
}

@media (min-width: 1200px) {
  .essay-layout {
    grid-template-columns: 220px 768px;
    gap: 80px;
    justify-content: center;
  }
}

.essay-toc {
  display: none;
}

@media (min-width: 1024px) {
  .essay-toc {
    display: block;
    position: sticky;
    top: 64px;
    align-self: start;
    max-height: calc(100vh - 128px);
    overflow-y: auto;
    padding-bottom: 24px;
    scrollbar-width: none;
  }
  .essay-toc::-webkit-scrollbar {
    display: none;
  }
}

.toc-container {
  position: relative;
  padding-left: 20px;
  border-left: 1px solid var(--rule);
}

.toc-progress-line {
  position: absolute;
  left: -1px;
  top: 0;
  width: 2px;
  background: var(--ink);
  height: 0%;
  transition: height 0.05s linear;
}

.toc-list {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.toc-item {
  margin: 0 !important;
  padding: 0 !important;
}

.toc-item a {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  opacity: 0.6;
  line-height: 1.5;
  display: block;
  transition: color 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
  transform-origin: left center;
}

.toc-item a:hover {
  color: var(--ink);
  opacity: 1;
  transform: translateX(2px);
}

.toc-item.active a {
  color: var(--ink);
  opacity: 1;
  font-weight: 500;
  transform: translateX(4px);
}