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

:root {
  --black: #0a0a0a;
  --white: #fafaf8;
  --grey-100: #f0f0ec;
  --grey-300: #d0d0c8;
  --grey-500: #909088;
  --grey-700: #404038;
  --serif: 'EB Garamond', Georgia, serif;
  --sans: 'DM Sans', system-ui, sans-serif;
  --mono: 'DM Mono', 'Courier New', monospace;
  --nav-h: 50px;
  --pad: 1.25rem;
  --max-w: 1200px;
}

html { font-size: 17px; scroll-behavior: smooth; }

body {
  background: var(--white);
  color: var(--black);
  font-family: var(--serif);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--pad);
  background: var(--white);
  border-bottom: 1px solid var(--grey-300);
}

.nav-wordmark {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--black);
}

.nav-meta {
  font-family: var(--sans);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey-500);
}

/* ── ARTWORK SECTION ── */
.artwork-section {
  margin-top: var(--nav-h);
  padding: var(--pad);
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}

.artwork-frame {
  border: 2px solid var(--black);
}

.artwork-poem {
  padding: 2rem var(--pad);
}

.artwork-couplet {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 2.2;
  cursor: pointer;
  transition: opacity 0.12s;
  -webkit-tap-highlight-color: transparent;
}

.artwork-couplet + .artwork-couplet { margin-top: 0.35rem; }

.artwork-couplet:hover { opacity: 0.5; }

.artwork-couplet.active { background: var(--grey-100); }

/* Cartel */
.cartel-meta {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey-500);
  margin-bottom: 1.25rem;
}

.cartel-title {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 5vw, 2.2rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.cartel-author {
  font-family: var(--serif);
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.cartel-dates {
  font-family: var(--sans);
  font-size: 0.65rem;
  color: var(--grey-500);
}

.cartel-institution {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-500);
  margin-bottom: 1.5rem;
}

.cartel-deck {
  font-family: var(--serif);
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--grey-700);
  border-top: 1px solid var(--grey-300);
  padding-top: 1.25rem;
}

.cartel-lesson {
  margin-top: 1.75rem;
  font-family: var(--sans);
  font-size: 0.55rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey-300);
}

/* ── MAIN ── */
main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.section-label {
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--grey-500);
  margin-bottom: 1.5rem;
  padding-top: 3rem;
  border-top: 1px solid var(--grey-300);
}

/* ── COMMENTARY ── */
.commentary-section {
  padding-bottom: 3rem;
}

.commentary-section .section-label {
  padding-top: 2.5rem;
  margin-bottom: 2rem;
}

.commentary-item {
  border-bottom: 1px solid var(--grey-300);
  transition: opacity 0.15s;
}

.commentary-item:last-child { border-bottom: none; }

.commentary-couplet {
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 300;
  line-height: 2.1;
  padding: 1.25rem var(--pad);
  background: var(--grey-100);
  color: var(--grey-700);
}

.commentary-annotation {
  padding: 1.25rem var(--pad);
}

.annotation-step {
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey-500);
  margin-bottom: 0.6rem;
}

.annotation-text {
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--grey-700);
}

/* ── DOCUMENTS ── */
.documents-section {
  border-top: 1px solid var(--grey-300);
  padding: 3rem 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.document-figure { margin: 0; }

.document-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.document-placeholder {
  width: 100%;
  background: var(--grey-100);
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.document-placeholder-text {
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey-500);
  text-align: center;
  padding: 1rem 2rem;
}

.document-caption {
  font-family: var(--sans);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--grey-500);
  margin-top: 0.75rem;
  line-height: 1.6;
}

/* ── STORY ── */
.story-section {
  padding: 3rem 0;
}

.story-body p {
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--black);
  margin-bottom: 1.4rem;
}

.story-body p:first-of-type::first-letter {
  font-size: 3.2rem;
  float: left;
  line-height: 0.82;
  margin-right: 0.08em;
  margin-top: 0.1em;
}

/* Inline figures */
.story-body figure { margin: 2.5rem 0; }

.story-body figure img {
  display: block;
  width: 100%;
  height: auto;
}

.story-body figcaption {
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--grey-500);
  margin-top: 0.75rem;
  line-height: 1.6;
}

.figure-portrait { max-width: 360px; }

.figure-embed iframe {
  display: block;
  width: 100%;
  background: var(--grey-100);
}

/* ── AUTHOR INFOBOX ── */
.author-section {
  padding: 3rem 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.author-portrait { max-width: 200px; }

.author-portrait img {
  display: block;
  width: 100%;
  height: auto;
}

.author-name {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin-bottom: 0.2rem;
}

.author-dates-line {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey-500);
  margin-bottom: 1.75rem;
}

.author-fact {
  padding: 0.9rem 0;
  border-top: 1px solid var(--grey-300);
}

.author-fact:last-child { border-bottom: 1px solid var(--grey-300); }

.author-fact-label {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey-500);
  margin-bottom: 0.3rem;
}

.author-fact-text {
  font-family: var(--serif);
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--grey-700);
}

/* ── SIGNIFICANCE ── */
.significance-section { padding: 3rem 0; }

.significance-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 2rem;
}

.significance-item-number {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 300;
  color: var(--grey-300);
  line-height: 1;
  margin-bottom: 0.75rem;
}

.significance-item-text {
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--grey-700);
}

/* ── BIBLIOGRAPHY ── */
.bibliography-section { padding: 3rem 0; }

.bibliography-list {
  margin-top: 2rem;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  counter-reset: bibliography;
}

.bibliography-item {
  font-family: var(--sans);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--grey-700);
  padding-left: 2rem;
  position: relative;
  counter-increment: bibliography;
}

.bibliography-item::before {
  content: counter(bibliography);
  position: absolute;
  left: 0;
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 300;
  color: var(--grey-300);
  top: 0.1em;
}

.bibliography-item em {
  font-style: italic;
}

/* ── EXERCISE ── */
.exercise-section { padding: 3rem 0 5rem; }

.exercise-box { margin-top: 2rem; }

.exercise-prompt {
  font-family: var(--serif);
  font-size: 1.25rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.exercise-instruction {
  font-family: var(--sans);
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--grey-500);
}

/* ── HOME ── */
.home-main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: calc(var(--nav-h) + 4rem) var(--pad) 8rem;
}

.home-title {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 5vw, 3rem);
  font-weight: 400;
  margin-bottom: 2rem;
}

.home-intro {
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--grey-700);
  max-width: 60ch;
  margin-bottom: 4rem;
}

.home-intro p { margin-bottom: 1rem; }
.home-intro p:last-child { margin-bottom: 0; }

.home-featured {
  display: block;
  margin: 2.5rem 0;
  padding: 1rem 0 1rem 1.5rem;
  border-left: 2px solid var(--black);
  text-decoration: none;
  color: inherit;
  transition: opacity 0.1s;
}

.home-featured:hover { opacity: 0.6; }

.home-featured-label {
  display: block;
  font-family: var(--sans);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  color: var(--grey-500);
}

.home-featured-title {
  display: block;
  font-family: var(--serif);
  font-size: 1.4rem;
  margin-bottom: 0.25rem;
}

.home-featured-author {
  display: block;
  font-family: var(--sans);
  font-size: 0.7rem;
  color: var(--grey-500);
}

.lessons-catalogue-label {
  font-family: var(--sans);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-500);
  margin-bottom: 0.75rem;
}

.lessons-catalogue { border-top: 2px solid var(--black); }

.catalogue-item {
  display: grid;
  grid-template-columns: 5rem 1fr;
  grid-template-rows: auto auto;
  gap: 0 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--grey-300);
  text-decoration: none;
  color: var(--black);
  transition: opacity 0.1s;
}

.catalogue-item:hover { opacity: 0.45; }

.catalogue-item-disabled {
  cursor: default;
  opacity: 0.35;
  pointer-events: none;
}

.catalogue-item-disabled .catalogue-title {
  color: var(--grey-700);
}

.catalogue-date {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 300;
  color: var(--grey-500);
  grid-row: 1;
  align-self: baseline;
  padding-top: 0.15em;
}

.catalogue-title {
  font-family: var(--serif);
  font-size: 1.1rem;
  grid-column: 2;
  grid-row: 1;
}

.catalogue-available {
  font-family: var(--sans);
  font-size: 0.7rem;
  color: var(--grey-500);
  margin-left: 0.3rem;
}

.catalogue-author {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-500);
  grid-column: 2;
  grid-row: 2;
  margin-top: 0.2rem;
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--grey-300);
  padding: 1.5rem var(--pad);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
}

.footer-nav { display: flex; gap: 2rem; }

.footer-nav a {
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey-500);
  text-decoration: none;
}

.footer-nav a:hover { color: var(--black); }

.footer-copy {
  font-family: var(--sans);
  font-size: 0.65rem;
  color: var(--grey-500);
}

/* ════════════════════════════════════ TABLET ≥ 640px ════════════════════════════════════ */
@media (min-width: 640px) {
  :root { --pad: 2rem; }

  .artwork-section { padding: 2rem; gap: 2.5rem; }
  .artwork-poem { padding: 2.5rem; }

  .author-section {
    flex-direction: row;
    align-items: flex-start;
    gap: 3rem;
  }
  .author-portrait { flex: 0 0 180px; }
  .author-info { flex: 1; }

  .significance-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

/* ════════════════════════════════════ DESKTOP ≥ 1024px ════════════════════════════════════ */
@media (min-width: 1024px) {
  :root { --pad: 3rem; }
  html { font-size: 18px; }
  nav { padding: 0 var(--pad); }

  /* Artwork: frame left (~60%), cartel right (~40%), cartel sticky */
  .artwork-section {
    flex-direction: row;
    align-items: flex-start;
    padding: 4rem 3rem;
    gap: 5rem;
  }
  .artwork-frame { flex: 0 0 58%; }
  .artwork-poem { padding: 4rem; }
  .artwork-couplet { font-size: 1.1rem; }

  .artwork-cartel {
    flex: 1;
    position: sticky;
    top: calc(var(--nav-h) + 4rem);
    border-top: 2px solid var(--black);
    padding-top: 1.5rem;
  }
  .cartel-meta { margin-bottom: 1.5rem; }
  .cartel-title { font-size: 1.9rem; }

  main { padding: 0 var(--pad); }
  .section-label { padding-top: 5rem; margin-bottom: 2rem; }
  .commentary-section .section-label { padding-top: 3rem; margin-bottom: 3rem; }

  /* Commentary two-column */
  .commentary-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-bottom: none;
  }
  .commentary-item + .commentary-item .commentary-couplet,
  .commentary-item + .commentary-item .commentary-annotation {
    border-top: 1px solid var(--grey-300);
  }
  .commentary-couplet { padding: 2rem 3rem; font-size: 0.95rem; }
  .commentary-annotation {
    padding: 2rem 3rem;
    border-left: 1px solid var(--grey-300);
  }
  .commentary-item.active .commentary-couplet { background: var(--grey-100); }
  .commentary-list.has-active .commentary-item:not(.active) { opacity: 0.3; }

  .story-section { padding: 5rem 0; }
  .story-body p { font-size: 1.1rem; max-width: 60ch; }

  .author-section { padding: 5rem 0; }
  .author-portrait { flex: 0 0 220px; }

  .significance-section { padding: 5rem 0; }
  .significance-grid { margin-top: 3rem; }

  .exercise-section { padding: 5rem 0 8rem; }
  .exercise-box { margin-top: 3rem; }
  .exercise-prompt { font-size: 1.4rem; }

  footer {
    flex-direction: row;
    justify-content: space-between;
    padding: 2rem var(--pad);
    text-align: left;
  }
}