/* ============================================================
   hangul.dev — A Typographic Specimen Book of 한글
   ============================================================
   Palette
     #f7f3eb  warmtone ivory   (background — aged hanji)
     #1a1a1a  carbon           (primary ink)
     #6b6358  slate-mushroom   (secondary text, hairlines, page numerals)
     #8b1d2c  vermilion seal   (accent — used sparingly)
     #0d3a3a  pine-shadow      (stroke-order live ink, compose live glyph)

   Type
     Display KR : Gowun Batang   (myeongjo)
     Body    KR : Noto Serif KR
     Latin      : EB Garamond   (regular, italic, bold)
     Code       : JetBrains Mono
   ============================================================ */

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

:root {
  --ivory:    #f7f3eb;
  --carbon:   #1a1a1a;
  --slate:    #6b6358;
  --vermilion:#8b1d2c;
  --pine:     #0d3a3a;

  --margin-x: 11.5vw;
  --leaf-gap: 22vh;
  --rule:     0.5px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--ivory);
  color: var(--carbon);
  font-family: "EB Garamond", "Noto Serif KR", Georgia, serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  font-feature-settings: "onum" 1, "liga" 1, "kern" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

em, i { font-style: italic; }
strong, b { font-weight: 700; }

code {
  font-family: "JetBrains Mono", ui-monospace, Menlo, monospace;
  font-size: 0.92em;
  letter-spacing: 0;
}

/* ----------- Form switch (numbering toggle) ----------- */

.form-switch {
  position: fixed;
  top: 2.4vh;
  right: var(--margin-x);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 0.4em;
  font-family: "EB Garamond", serif;
  font-size: 1rem;
  letter-spacing: 0.02em;
}
.form-opt {
  background: transparent;
  border: 0;
  padding: 0.2em 0.35em;
  font: inherit;
  font-size: 1.05rem;
  color: var(--slate);
  cursor: pointer;
  transition: color 220ms ease, opacity 220ms ease;
  opacity: 0.55;
}
.form-opt:hover { color: var(--vermilion); opacity: 1; }
.form-opt.is-active { color: var(--vermilion); opacity: 1; }
.form-divider { color: var(--slate); opacity: 0.4; font-size: 0.9rem; }

/* ----------- Scroll indicator ----------- */

.leaf-indicator {
  position: fixed;
  top: 6.5vh;
  right: var(--margin-x);
  z-index: 40;
  font-family: "EB Garamond", serif;
  font-size: 0.78rem;
  color: var(--slate);
  letter-spacing: 0.08em;
  transition: color 380ms ease;
}
.leaf-indicator.is-flash { color: var(--vermilion); }
.indicator-current { font-weight: 600; color: var(--carbon); transition: color 380ms ease; }
.leaf-indicator.is-flash .indicator-current { color: var(--vermilion); }
.indicator-slash { margin: 0 0.35em; opacity: 0.5; }

/* ----------- Manuscript / Leaf base ----------- */

.manuscript {
  width: 100%;
  padding: 8vh 0 10vh;
}

.leaf {
  position: relative;
  min-height: 100vh;
  padding: 6vh var(--margin-x) calc(var(--leaf-gap) + 2vh);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.leaf-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 8vh;
  gap: 3vw;
  flex-wrap: wrap;
}

.jamo-procession {
  font-family: "Noto Serif KR", serif;
  font-size: 1.05rem;
  color: var(--slate);
  letter-spacing: 0.18em;
  line-height: 1;
  user-select: none;
}
.jamo-procession span {
  display: inline-block;
  padding: 0 0.05em;
  transition: color 380ms ease;
}
.jamo-procession .is-active { color: var(--carbon); font-weight: 700; }

.leaf-numeral {
  font-family: "EB Garamond", serif;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--slate);
  text-align: right;
  display: flex;
  align-items: baseline;
  gap: 0.7em;
  cursor: default;
  transition: color 380ms ease;
}
.leaf-numeral:hover { color: var(--vermilion); }
.leaf-numeral.is-flash { color: var(--vermilion); }

.leaf-numeral-form {
  font-style: normal;
  font-family: "Noto Serif KR", "EB Garamond", serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: inherit;
  display: none;
}
.leaf-numeral-form.is-current { display: inline-block; }

.leaf-name {
  font-style: italic;
  letter-spacing: 0.02em;
  color: var(--slate);
}

.leaf-body { flex: 1; }
.leaf-prose {
  font-family: "Noto Serif KR", "EB Garamond", serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  max-width: 36em;
  color: var(--carbon);
}
.leaf-prose em { color: var(--carbon); }

.leaf-foot {
  margin-top: 4vh;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1em;
}
.leaf-foot .hairline {
  flex: 1;
  height: 0;
  border-top: var(--rule) solid var(--slate);
  opacity: 0.45;
  max-width: 22%;
}
.page-num {
  font-family: "EB Garamond", serif;
  font-size: 0.65rem;
  color: var(--slate);
  letter-spacing: 0.18em;
  font-feature-settings: "onum" 1;
}
.page-num-form { display: none; }
.page-num-form.is-current { display: inline; }

/* Caesura — vertical rule between thoughts */
.caesura-rule {
  display: block;
  width: 0;
  height: 4em;
  margin: 4vh 0 2vh;
  border-left: var(--rule) solid var(--slate);
  opacity: 0.6;
}

/* Margin-note */
.margin-note {
  position: absolute;
  width: 13vw;
  font-family: "EB Garamond", serif;
  font-size: 0.78rem;
  color: var(--slate);
  line-height: 1.4;
}
.margin-note.margin-right { right: 1.5vw; top: 38vh; }
.margin-note.margin-left  { left:  1.5vw; top: 38vh; }
.margin-note .korean-term {
  display: block;
  font-family: "Noto Serif KR", serif;
  color: var(--carbon);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  margin-bottom: 0.2em;
}
.margin-note .gloss { font-style: italic; }

/* ============================================================
   LEAF 1 — The Naming Leaf
   ============================================================ */

.leaf-1-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-height: 70vh;
}

.domain-mark {
  position: relative;
  width: 100%;
  height: 48vh;
  margin-bottom: 2vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  gap: clamp(0.3rem, 1vw, 1rem);
  font-family: "Gowun Batang", "Noto Serif KR", serif;
  font-weight: 700;
  font-size: clamp(3rem, 8vw, 8.5rem);
  letter-spacing: -0.02em;
  line-height: 0.92;
  color: var(--carbon);
  user-select: none;
}

.domain-mark .syllable {
  position: relative;
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1.4fr 1fr;
  width: 1.05em;
  height: 1.15em;
  align-items: center;
  justify-items: center;
}

.domain-mark .syllable[data-syllable="한"] .j-ini { grid-column: 1; grid-row: 1; }
.domain-mark .syllable[data-syllable="한"] .j-med { grid-column: 2; grid-row: 1; }
.domain-mark .syllable[data-syllable="한"] .j-fin { grid-column: 1 / span 2; grid-row: 2; }

.domain-mark .syllable[data-syllable="글"] .j-ini { grid-column: 1 / span 2; grid-row: 1; align-self: end; }
.domain-mark .syllable[data-syllable="글"] .j-med { grid-column: 1 / span 2; grid-row: 1; align-self: center; transform: translateY(0.18em); }
.domain-mark .syllable[data-syllable="글"] .j-fin { grid-column: 1 / span 2; grid-row: 2; }

.domain-mark .syllable[data-syllable="디"] .j-ini { grid-column: 1; grid-row: 1 / span 2; align-self: center; }
.domain-mark .syllable[data-syllable="디"] .j-med { grid-column: 2; grid-row: 1 / span 2; align-self: center; }

.domain-mark .syllable[data-syllable="브"] .j-ini { grid-column: 1 / span 2; grid-row: 1; align-self: end; }
.domain-mark .syllable[data-syllable="브"] .j-med { grid-column: 1 / span 2; grid-row: 2; }

.domain-mark .syllable-dot {
  width: 0.4em;
  align-items: end;
  justify-content: center;
}
.domain-mark .syllable-dot .j-dot {
  font-size: 0.7em;
  color: var(--slate);
  align-self: end;
  padding-bottom: 0.18em;
}

.domain-mark .jamo {
  display: inline-block;
  color: var(--slate);
  opacity: 0.25;
  transform: translate(var(--rx, 0), var(--ry, 0)) rotate(var(--rr, 0deg));
  transition:
    transform 1100ms cubic-bezier(0.16, 1, 0.3, 1),
    opacity   1100ms ease,
    color     900ms  ease 1100ms;
  will-change: transform, opacity, color;
}
.domain-mark.is-assembled .jamo {
  transform: translate(0, 0) rotate(0);
  opacity: 1;
  color: var(--carbon);
}

.domain-mark-romanize {
  font-family: "EB Garamond", serif;
  font-style: italic;
  color: var(--slate);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  margin-bottom: 4vh;
  margin-left: 2vw;
}
.domain-mark-romanize .sep { font-style: normal; opacity: 0.6; }

/* ============================================================
   LEAF 2 — The Anatomy Leaf
   ============================================================ */

.leaf-2-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6vh;
}

.anatomy-stage {
  position: relative;
  width: min(72vh, 60vw);
  height: 72vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.anatomy-grid {
  position: absolute;
  inset: 4%;
  pointer-events: none;
}
.anatomy-grid-col,
.anatomy-grid-row {
  position: absolute;
  background: var(--slate);
  opacity: 0.35;
}
.anatomy-grid-col {
  width: var(--rule);
  top: 0; bottom: 0;
}
.anatomy-grid-row {
  height: var(--rule);
  left: 0; right: 0;
}
.anatomy-grid-col:nth-child(1) { left: 33.33%; }
.anatomy-grid-col:nth-child(2) { left: 50%; }
.anatomy-grid-col:nth-child(3) { left: 66.66%; }
.anatomy-grid-row:nth-child(4) { top: 33.33%; }
.anatomy-grid-row:nth-child(5) { top: 66.66%; }

.anatomy-glyph {
  position: relative;
  z-index: 2;
  font-family: "Gowun Batang", "Noto Serif KR", serif;
  font-weight: 700;
  font-size: clamp(12rem, 50vh, 28rem);
  line-height: 1;
  color: var(--carbon);
  letter-spacing: -0.03em;
}

.anatomy-pin {
  position: absolute;
  left: var(--px);
  top: var(--py);
  z-index: 3;
  pointer-events: none;
}
.anatomy-pin .pin-line {
  position: absolute;
  top: 50%;
  width: 8vw;
  border-top: var(--rule) solid var(--slate);
  opacity: 0.7;
}
.anatomy-pin.pin-ini .pin-line { right: 100%; margin-right: 0.4em; }
.anatomy-pin.pin-med .pin-line { left:  100%; margin-left:  0.4em; }
.anatomy-pin.pin-fin .pin-line { left:  100%; margin-left:  0.4em; }
.anatomy-pin .pin-label {
  display: inline-block;
  font-family: "EB Garamond", serif;
  font-size: 0.85rem;
  color: var(--slate);
  line-height: 1.3;
  white-space: nowrap;
}
.anatomy-pin .pin-label em {
  display: block;
  font-family: "Noto Serif KR", serif;
  font-style: normal;
  color: var(--carbon);
  font-size: 1rem;
  letter-spacing: 0.04em;
}
.anatomy-pin .pin-label b {
  font-family: "Noto Serif KR", serif;
  color: var(--vermilion);
  font-weight: 700;
  margin-left: 0.1em;
}
.anatomy-pin.pin-ini .pin-label { transform: translate(calc(-100% - 9vw), -50%); }
.anatomy-pin.pin-med .pin-label,
.anatomy-pin.pin-fin .pin-label { transform: translate(9vw, -50%); }

/* ============================================================
   LEAF 3 — The Code Leaf
   ============================================================ */

.leaf-3-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6vh;
}

.code-pair {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4vw;
  align-items: center;
  padding: 4vh 0;
  border-top: var(--rule) solid var(--slate);
  border-bottom: var(--rule) solid var(--slate);
}
.code-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5vh;
  font-family: "Noto Serif KR", serif;
}
.visual-syllable {
  font-family: "Gowun Batang", "Noto Serif KR", serif;
  font-size: clamp(6rem, 12vw, 10rem);
  font-weight: 700;
  line-height: 1;
  color: var(--carbon);
}
.visual-arrow {
  font-size: 1.4rem;
  color: var(--slate);
  letter-spacing: 0.05em;
}
.visual-jamos {
  display: flex;
  gap: 1.5em;
  font-family: "Noto Serif KR", serif;
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--carbon);
}
.visual-codes {
  display: flex;
  gap: 1em;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--slate);
  letter-spacing: 0.04em;
}
.visual-codes span { width: 4.5em; text-align: center; }

.code-source pre {
  margin: 0;
  padding: 2.5vh 2vw;
  background: transparent;
  border-top: var(--rule) solid var(--slate);
  border-bottom: var(--rule) solid var(--slate);
}
.code-source code {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--carbon);
  white-space: pre;
  overflow-x: auto;
}

/* Syntax tints — kept restrained */
.kw  { color: var(--slate); font-style: italic; }
.fn  { color: var(--carbon); font-weight: 600; }
.num { color: var(--slate); }
.str { color: var(--carbon); }
.cmt { color: var(--slate); opacity: 0.75; font-style: italic; }
.hl  { color: var(--vermilion); }

/* ============================================================
   LEAF 4 — The Specimen Wall
   ============================================================ */

.leaf-4-body {
  display: flex;
  flex-direction: column;
  gap: 4vh;
}

.specimen-caption {
  font-family: "EB Garamond", serif;
  color: var(--slate);
  font-size: 0.95rem;
  font-style: italic;
}
.specimen-caption em { color: var(--carbon); }

.specimen-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3vw 2.4vw;
  margin-top: 3vh;
}
.specimen-cell {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.8em;
  padding: 1.2em 0;
  border-top: var(--rule) solid var(--slate);
  opacity: 0;
  transition: opacity 1100ms ease;
}
.specimen-cell.is-shown { opacity: 1; }

.specimen-word {
  font-size: 2.6rem;
  line-height: 1;
  color: var(--carbon);
  letter-spacing: -0.01em;
  font-weight: 400;
}
.specimen-label {
  font-family: "EB Garamond", serif;
  font-style: italic;
  font-size: 0.7rem;
  color: var(--slate);
  letter-spacing: 0.04em;
}

/* ============================================================
   LEAF 5 — The Stroke-Order Leaf
   ============================================================ */

.leaf-5-body { display: flex; flex-direction: column; gap: 5vh; }

.stroke-prose { max-width: 32em; }

.stroke-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2vw 1.6vw;
  margin-top: 2vh;
}
.stroke-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6em;
  padding: 1em 0.4em;
  cursor: pointer;
  border-top: var(--rule) solid var(--slate);
}
.stroke-cell svg {
  width: 100%;
  max-width: 88px;
  aspect-ratio: 1 / 1;
  display: block;
}
.stroke-cell svg path {
  fill: none;
  stroke: var(--pine);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 900ms ease 720ms;
}
.stroke-cell.is-drawn svg path {
  stroke: var(--carbon);
}
.stroke-cell .stroke-label {
  font-family: "Noto Serif KR", serif;
  font-size: 0.85rem;
  color: var(--slate);
  letter-spacing: 0.05em;
}

/* ============================================================
   LEAF 6 — The Compose Leaf
   ============================================================ */

.leaf-6-body {
  display: flex;
  flex-direction: column;
  gap: 4vh;
}
.compose-frame {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4vw;
  align-items: center;
  padding: 4vh 0;
  border-top: var(--rule) solid var(--slate);
  border-bottom: var(--rule) solid var(--slate);
}

.compose-input-pane {
  display: flex;
  flex-direction: column;
  gap: 2vh;
}
.compose-label {
  font-family: "EB Garamond", serif;
  color: var(--slate);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}
.compose-input {
  background: transparent;
  border: 0;
  border-bottom: var(--rule) solid var(--slate);
  padding: 0.4em 0;
  font-family: "EB Garamond", serif;
  font-size: 1.4rem;
  color: var(--carbon);
  outline: 0;
  letter-spacing: 0.03em;
  font-style: italic;
  width: 100%;
  position: relative;
  background-image: linear-gradient(to right, var(--pine) 0%, var(--pine) 100%);
  background-repeat: no-repeat;
  background-size: 0% 1px;
  background-position: left bottom;
  transition: background-size 240ms ease;
}
.compose-input:focus,
.compose-input:hover {
  background-size: 100% 1px;
}
.compose-output {
  font-family: "Gowun Batang", "Noto Serif KR", serif;
  font-weight: 700;
  font-size: 14rem;
  line-height: 1;
  color: var(--pine);
  letter-spacing: -0.04em;
  min-height: 1em;
  margin-top: 1vh;
  word-break: break-all;
}
.compose-hint {
  font-family: "EB Garamond", serif;
  font-style: italic;
  color: var(--slate);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}
.compose-hint .hint-token {
  cursor: pointer;
  border-bottom: var(--rule) dotted var(--slate);
  transition: color 240ms ease, border-color 240ms ease;
}
.compose-hint .hint-token:hover {
  color: var(--vermilion);
  border-color: var(--vermilion);
}
.compose-hint .sep { opacity: 0.4; padding: 0 0.4em; }

.compose-source pre { margin: 0; padding: 0; background: transparent; }
.compose-source code {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--carbon);
  white-space: pre;
  overflow-x: auto;
}

/* ============================================================
   LEAF 7 — The Letter as Object
   ============================================================ */

.leaf-7-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6vh;
  min-height: 72vh;
}
.object-glyph {
  font-family: "Gowun Batang", "Noto Serif KR", serif;
  font-weight: 700;
  font-size: 90vh;
  line-height: 0.85;
  color: var(--carbon);
  letter-spacing: -0.06em;
  user-select: none;
  margin-top: -8vh;
}
.sejong-epigraph {
  max-width: 36em;
  text-align: center;
  font-family: "EB Garamond", serif;
  font-style: italic;
  color: var(--slate);
  font-size: 1.05rem;
  line-height: 1.6;
}
.sejong-epigraph cite {
  display: block;
  margin-top: 1em;
  font-size: 0.8rem;
  font-style: normal;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* ============================================================
   LEAF 8 — The Ligature Leaf
   ============================================================ */

.leaf-8-body { display: flex; flex-direction: column; gap: 6vh; }

.ligature-comparison {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4vw;
  padding: 5vh 0;
  border-top: var(--rule) solid var(--slate);
  border-bottom: var(--rule) solid var(--slate);
}
.ligature-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2em;
  flex: 1;
  max-width: 22em;
}
.ligature-label {
  font-family: "EB Garamond", serif;
  color: var(--slate);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}
.ligature-glyph {
  font-family: "Gowun Batang", "Noto Serif KR", serif;
  font-weight: 700;
  font-size: clamp(7rem, 15vw, 13rem);
  line-height: 1;
  color: var(--carbon);
}
.ligature-code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--slate);
  letter-spacing: 0.04em;
}
.ligature-arrow {
  font-family: "EB Garamond", serif;
  color: var(--slate);
  font-size: 1.6rem;
}

.ligature-prose-2 { margin-top: 2vh; }

/* ============================================================
   LEAF 9 — The Colophon
   ============================================================ */

.leaf-9-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-height: 70vh;
}

.colophon {
  width: 100%;
  max-width: 38em;
  margin-left: auto;
  margin-right: auto;
  padding: 6vh 0;
  border-top: var(--rule) solid var(--slate);
}
.colophon-title {
  font-family: "Noto Serif KR", "Gowun Batang", serif;
  font-weight: 700;
  font-size: 1.6rem;
  color: var(--carbon);
  letter-spacing: 0.02em;
  margin-bottom: 4vh;
}
.colophon-title em {
  font-family: "EB Garamond", serif;
  font-weight: 400;
  color: var(--slate);
  font-size: 0.9em;
  letter-spacing: 0.05em;
}

.colophon-list {
  display: grid;
  grid-template-columns: 8em 1fr;
  row-gap: 1.1em;
  column-gap: 1.5em;
  margin-bottom: 6vh;
  font-family: "EB Garamond", serif;
  font-size: 0.95rem;
  line-height: 1.5;
}
.colophon-list dt {
  color: var(--slate);
  font-style: italic;
  letter-spacing: 0.05em;
}
.colophon-list dd { color: var(--carbon); }
.colophon-list dd em { color: var(--slate); font-size: 0.92em; }
.cal-solar  { font-feature-settings: "lnum" 1; }
.cal-lunar  { font-family: "Noto Serif KR", serif; color: var(--slate); }

.sejong-line {
  margin: 4vh 0 5vh;
  font-family: "EB Garamond", serif;
  font-style: italic;
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--carbon);
  text-align: center;
  max-width: 28em;
  margin-left: auto;
  margin-right: auto;
}
.sejong-attr {
  display: block;
  margin-top: 1.4em;
  font-style: normal;
  font-size: 0.78rem;
  color: var(--slate);
  letter-spacing: 0.06em;
}

.colophon-foot {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.6em;
  margin-bottom: 4vh;
}
.seal {
  display: inline-block;
  line-height: 0;
}
.seal svg { display: block; }
.seal-romanize {
  font-family: "EB Garamond", serif;
  font-style: italic;
  font-size: 0.78rem;
  color: var(--vermilion);
  letter-spacing: 0.06em;
}
.colophon-end { text-align: right; margin-top: 4vh; }
.end-mark { color: var(--carbon); font-family: "EB Garamond", serif; font-size: 0.9rem; }

/* ============================================================
   Responsive — gentle, never decorative
   ============================================================ */

@media (max-width: 900px) {
  :root { --margin-x: 7vw; }
  .form-switch { right: 7vw; }
  .leaf-indicator { right: 7vw; }
  .leaf-head { flex-direction: column; gap: 2vh; }
  .jamo-procession { letter-spacing: 0.12em; font-size: 0.95rem; }
  .code-pair { grid-template-columns: 1fr; gap: 4vh; }
  .compose-frame { grid-template-columns: 1fr; gap: 4vh; }
  .specimen-grid { grid-template-columns: repeat(2, 1fr); }
  .stroke-grid { grid-template-columns: repeat(4, 1fr); }
  .ligature-comparison { flex-direction: column; gap: 4vh; }
  .ligature-arrow { transform: rotate(90deg); }
  .anatomy-stage { width: 90vw; height: 60vh; }
  .anatomy-pin .pin-line { width: 5vw; }
  .anatomy-pin.pin-ini .pin-label { transform: translate(calc(-100% - 6vw), -50%); }
  .anatomy-pin.pin-med .pin-label,
  .anatomy-pin.pin-fin .pin-label { transform: translate(6vw, -50%); }
  .compose-output { font-size: 8rem; }
  .object-glyph { font-size: 60vh; }
  .margin-note { display: none; }
  .colophon-list { grid-template-columns: 6em 1fr; }
}

@media (max-width: 540px) {
  .stroke-grid { grid-template-columns: repeat(3, 1fr); }
  .specimen-grid { grid-template-columns: 1fr 1fr; }
  .compose-output { font-size: 6rem; }
  .object-glyph { font-size: 50vh; }
  .visual-jamos { font-size: 1.7rem; gap: 1em; }
  .visual-codes { font-size: 0.7rem; }
  .domain-mark { font-size: clamp(2.4rem, 12vw, 5rem); }
}