/* ============================================================
   hangeul.day  ::  scholarly isometric atelier
   palette: cool greys + brass + drafting blue
   ============================================================ */

:root {
    /* palette --- exact hex values from DESIGN.md */
    --c-cold-paper:    #e8ebef;
    --c-plate:         #d3d8df;
    --c-mid-graph:     #9ea6b1;
    --c-slate:         #5b6675;
    --c-deep-ink:      #1f2630;
    --c-draft-blue:    #7d92ad;
    --c-brass:         #bfa66b;
    --c-aged-label:    #f5f1e6;
    --c-annot:         #3a4250;

    /* isometric system */
    --iso:        rotateX(55deg) rotateZ(-45deg);
    --iso-text:   rotateZ(45deg) rotateX(-55deg);

    /* typography */
    --f-display:  "Gowun Batang", "Noto Serif KR", serif;
    --f-display2: "Cormorant Garamond", "Spectral", serif;
    --f-body:     "Spectral", "Noto Serif KR", serif;
    --f-ko:       "Noto Serif KR", "Gowun Batang", serif;
    --f-mono:     "JetBrains Mono", ui-monospace, monospace;

    /* rhythm */
    --gutter: 24px;
    --col: 1fr;
    --max: 1320px;

    /* motion */
    --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
    --t-fast: 200ms;
    --t-base: 240ms;
    --t-slow: 360ms;
}

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

html, body {
    background: var(--c-cold-paper);
    color: var(--c-deep-ink);
    font-family: var(--f-body);
    font-weight: 400;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    position: relative;
    padding: 0;
}

/* ---------- graph paper underlay ---------- */
.paper-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, rgba(125, 146, 173, 0.10) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(125, 146, 173, 0.10) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.6;
    mix-blend-mode: multiply;
}
@media (max-width: 720px) {
    .paper-grid { display: none; }
}

/* ---------- running head ---------- */
.running-head {
    position: relative;
    z-index: 4;
    max-width: var(--max);
    margin: 0 auto;
    padding: 22px 48px 14px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 24px;
    font-family: var(--f-display2);
    font-size: 0.78rem;
    color: var(--c-slate);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-bottom: 0.5px solid var(--c-mid-graph);
}
.run-left  { text-align: left; }
.run-center { text-align: center; }
.run-right { text-align: right; display: inline-flex; gap: 8px; justify-content: flex-end; }
.run-sep   { color: var(--c-mid-graph); }
.run-num   { font-family: var(--f-mono); font-size: 0.72rem; color: var(--c-slate); }

.brass-dot {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--c-brass);
    box-shadow:
        inset -1px -1px 0 rgba(31,38,48,0.35),
        inset 1px 1px 0 rgba(245,241,230,0.6);
}

/* ============================================================
   BAND BASE
   ============================================================ */
.band {
    position: relative;
    z-index: 2;
    max-width: var(--max);
    margin: 0 auto;
    padding: 96px 48px 88px;
}

.band-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 36px;
    font-family: var(--f-display2);
    font-size: 0.74rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-slate);
}
.meta-folio {
    font-family: var(--f-mono);
    color: var(--c-deep-ink);
    letter-spacing: 0.1em;
    font-size: 0.72rem;
}
.meta-rule {
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, var(--c-mid-graph), transparent);
}
.meta-sub em {
    font-style: italic;
    color: var(--c-mid-graph);
}

.band-header {
    display: grid;
    grid-template-columns: minmax(280px, 0.55fr) 1fr;
    gap: 56px;
    align-items: end;
    margin-bottom: 56px;
}
@media (max-width: 880px) {
    .band-header { grid-template-columns: 1fr; gap: 24px; }
}

.band-title {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: clamp(2.6rem, 4.5vw, 4.5rem);
    letter-spacing: -0.01em;
    color: var(--c-deep-ink);
    line-height: 1;
    display: flex;
    align-items: baseline;
    gap: 18px;
    flex-wrap: wrap;
}
.band-title .t-divider {
    color: var(--c-mid-graph);
    font-weight: 300;
}
.band-title .t-en {
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 0.62em;
    color: var(--c-slate);
    font-weight: 500;
}

.band-blurb {
    font-family: var(--f-body);
    font-weight: 350;
    font-size: 1.02rem;
    line-height: 1.65;
    color: var(--c-slate);
    max-width: 60ch;
}
.band-blurb em {
    font-style: italic;
    color: var(--c-deep-ink);
}
.ko-inline {
    font-family: var(--f-display);
    color: var(--c-deep-ink);
    font-size: 1.05em;
    padding: 0 0.06em;
}

/* entrance state */
.band [data-reveal] {
    opacity: 0;
    transform: translate3d(0, 12px, 0);
    transition:
        opacity 480ms var(--ease-out),
        transform 480ms var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
}
.band.in-view [data-reveal] {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

/* ============================================================
   BAND 1 :: ATELIER BANNER
   ============================================================ */
.band-banner {
    padding-top: 56px;
}
.banner-grid {
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 64px;
    align-items: center;
}
@media (max-width: 980px) {
    .banner-grid { grid-template-columns: 1fr; gap: 32px; }
}

.overline {
    font-family: var(--f-display2);
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-slate);
    margin-bottom: 18px;
}
.banner-title {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: clamp(2.4rem, 4.6vw, 4.4rem);
    line-height: 1.05;
    letter-spacing: -0.01em;
    color: var(--c-deep-ink);
    margin-bottom: 28px;
}
.banner-title .t-ko {
    display: block;
    margin-bottom: 6px;
}
.banner-title .t-en {
    display: block;
    font-family: var(--f-display2);
    font-size: 0.62em;
    font-weight: 500;
    color: var(--c-slate);
    font-style: normal;
}
.banner-title .t-en em {
    font-style: italic;
    color: var(--c-deep-ink);
}

.banner-lede {
    font-family: var(--f-body);
    font-weight: 350;
    font-size: 1.06rem;
    line-height: 1.7;
    color: var(--c-slate);
    max-width: 56ch;
    margin-bottom: 32px;
}
.banner-credit {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 0.82rem;
    color: var(--c-mid-graph);
    border-left: 0.5px solid var(--c-mid-graph);
    padding-left: 14px;
}
.banner-credit .cred-line.ko {
    font-family: var(--f-ko);
    font-style: normal;
    color: var(--c-slate);
}
.banner-credit em { color: var(--c-slate); }

.banner-scene {
    position: relative;
    aspect-ratio: 4 / 3;
    background: var(--c-cold-paper);
    border: 0.5px solid var(--c-mid-graph);
    border-radius: 2px;
    padding: 18px;
    box-shadow:
        0 0 0 6px var(--c-cold-paper),
        0 0 0 6.5px var(--c-mid-graph),
        20px 26px 48px -28px rgba(31,38,48,0.18);
}
.scene-svg {
    width: 100%;
    height: 100%;
    display: block;
}
.scene-caption {
    position: absolute;
    left: 22px;
    bottom: 22px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-family: var(--f-display2);
    font-size: 0.74rem;
    color: var(--c-slate);
}
.scene-caption .cap-line.ko {
    font-family: var(--f-ko);
    color: var(--c-deep-ink);
}
.scene-caption .cap-line.en { font-style: italic; color: var(--c-mid-graph); }

/* ============================================================
   BAND 2 :: CONSONANT CABINET
   ============================================================ */
.grid-cards {
    display: grid;
    gap: var(--gutter);
}
.grid-consonants {
    grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 1080px) {
    .grid-consonants { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 720px) {
    .grid-consonants { grid-template-columns: repeat(2, 1fr); }
}

/* ---- vitrine card (consonants) ---- */
.vitrine {
    position: relative;
    background: var(--c-plate);
    border: 0.5px solid var(--c-mid-graph);
    padding: 22px 18px 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: default;
    transition: transform var(--t-base) var(--ease-out),
                box-shadow var(--t-base) var(--ease-out);
    will-change: transform;
}
.vitrine::before {
    /* blueprint corner ticks */
    content: "";
    position: absolute;
    inset: 6px;
    border: 0.4px dashed var(--c-mid-graph);
    pointer-events: none;
    opacity: 0.5;
}
.vitrine:hover {
    box-shadow: 14px 18px 36px -22px rgba(31, 38, 48, 0.30);
}

.v-stage {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    perspective: 1200px;
    perspective-origin: 30% 30%;
    margin-bottom: 12px;
}
.v-box {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
}
.v-box svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: visible;
}
/* mouth-diagram on back, hidden until hover */
.v-mouth {
    position: absolute;
    inset: 14% 12%;
    opacity: 0;
    transition: opacity var(--t-base) var(--ease-out);
    pointer-events: none;
}
.v-mouth path,
.v-mouth circle,
.v-mouth ellipse,
.v-mouth line {
    stroke: var(--c-draft-blue);
    fill: none;
    stroke-width: 0.75;
    vector-effect: non-scaling-stroke;
}
.v-mouth text {
    fill: var(--c-draft-blue);
    font-family: var(--f-mono);
    font-size: 7px;
    letter-spacing: 0.08em;
}
.vitrine:hover .v-mouth {
    opacity: 0.85;
    transition-duration: var(--t-base);
}
.vitrine:not(:hover) .v-mouth {
    transition-duration: var(--t-slow);
}

/* the floating jamo */
.v-jamo {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--t-base) var(--ease-out),
                filter var(--t-base) var(--ease-out);
    will-change: transform;
}
.v-jamo .jamo-glyph {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: 5.6rem;
    color: var(--c-deep-ink);
    line-height: 1;
    -webkit-text-stroke: 0px var(--c-deep-ink);
    transition: -webkit-text-stroke var(--t-base) var(--ease-out),
                color var(--t-base) var(--ease-out);
    filter: drop-shadow(2px 4px 0 rgba(31,38,48,0.18));
}
.vitrine:hover .v-jamo {
    transform: translate3d(0, -4px, 0);
}
.vitrine:hover .v-jamo .jamo-glyph {
    -webkit-text-stroke: 0.5px var(--c-deep-ink);
    filter: drop-shadow(2px 10px 4px rgba(31,38,48,0.18));
}

/* mounting wires */
.v-wires {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
}

/* nameplate */
.v-nameplate {
    position: relative;
    width: calc(100% + 6px);
    margin-top: auto;
    background: var(--c-aged-label);
    border: 0.4px solid #d4cdb6;
    padding: 10px 22px 9px;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: baseline;
    gap: 10px;
    box-shadow:
        inset 1px 1px 0 rgba(255,255,255,0.45),
        inset -1px -1px 0 rgba(31,38,48,0.10),
        0 1px 0 rgba(31,38,48,0.05);
}
.v-nameplate::before, .v-nameplate::after {
    content: "";
    position: absolute;
    top: -3px;
    width: 7px; height: 7px;
    border-radius: 50%;
    background:
        radial-gradient(circle at 35% 35%, #f2e4b8 0 18%, var(--c-brass) 20% 70%, #8c7740 80%);
    box-shadow:
        0 1px 0 rgba(31,38,48,0.35),
        inset -1px -1px 0 rgba(31,38,48,0.20);
    transition: box-shadow var(--t-base) var(--ease-out),
                transform var(--t-base) var(--ease-out);
}
.v-nameplate::before { left: 12px; }
.v-nameplate::after  { right: 12px; }
.vitrine:hover .v-nameplate::before,
.vitrine:hover .v-nameplate::after {
    transform: translateY(-1px);
    box-shadow:
        0 2px 0 rgba(31,38,48,0.30),
        inset -1px -1px 0 rgba(31,38,48,0.20),
        inset 1px 1px 0 rgba(255,251,230,0.7);
}

.np-row1 {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
}
.np-roman {
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--c-deep-ink);
    letter-spacing: 0.01em;
}
.np-ipa {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    color: var(--c-slate);
}
.np-art {
    font-family: var(--f-display2);
    font-variant: small-caps;
    font-size: 0.74rem;
    letter-spacing: 0.1em;
    color: var(--c-mid-graph);
    text-transform: lowercase;
}
.np-plate {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    color: var(--c-slate);
    text-align: right;
    white-space: nowrap;
}
.np-plate small {
    color: var(--c-mid-graph);
    font-size: 0.72em;
    margin-right: 4px;
}

/* unicode codepoint micro-caption above plate */
.v-uplate {
    position: absolute;
    top: 8px; right: 12px;
    font-family: var(--f-mono);
    font-size: 0.66rem;
    color: var(--c-mid-graph);
    letter-spacing: 0.04em;
}
.v-koname {
    position: absolute;
    top: 8px; left: 12px;
    font-family: var(--f-ko);
    font-size: 0.78rem;
    color: var(--c-slate);
}

/* ============================================================
   BAND 3 :: VOWEL GARDEN
   ============================================================ */
.vowel-primitives {
    position: relative;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gutter);
    margin-bottom: 56px;
}
@media (max-width: 880px) {
    .vowel-primitives { grid-template-columns: 1fr; }
}

.primitive {
    position: relative;
    background: var(--c-plate);
    border: 0.5px solid var(--c-mid-graph);
    padding: 28px 28px 24px;
    display: grid;
    grid-template-columns: 132px 1fr;
    gap: 24px;
    align-items: center;
    cursor: default;
    transition: box-shadow var(--t-base) var(--ease-out),
                background var(--t-base) var(--ease-out);
}
.primitive:hover {
    box-shadow: 16px 22px 40px -28px rgba(31,38,48,0.28);
}
.prim-icon svg {
    width: 100%;
    height: auto;
    display: block;
}
.prim-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.prim-jamo {
    font-family: var(--f-display);
    font-size: 3.4rem;
    color: var(--c-deep-ink);
    line-height: 1;
    margin-bottom: 4px;
}
.prim-label-ko {
    font-family: var(--f-ko);
    font-size: 1.05rem;
    color: var(--c-deep-ink);
}
.prim-label-en {
    font-family: var(--f-display2);
    font-size: 0.95rem;
    color: var(--c-slate);
}
.prim-label-en em { font-style: italic; }
.prim-note {
    margin-top: 8px;
    font-family: var(--f-body);
    font-size: 0.84rem;
    line-height: 1.55;
    color: var(--c-annot);
    border-top: 0.4px dashed var(--c-mid-graph);
    padding-top: 8px;
}

.prim-connectors {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: visible;
}
.prim-connectors path {
    fill: none;
    stroke: var(--c-draft-blue);
    stroke-width: 0.75;
    vector-effect: non-scaling-stroke;
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 400ms var(--ease-out), opacity 240ms var(--ease-out);
    opacity: 0;
}
.prim-connectors path.active {
    stroke-dashoffset: 0;
    opacity: 0.7;
}

/* ---- vowel cards (porcelain trays) ---- */
.grid-vowels {
    grid-template-columns: repeat(5, 1fr);
}
@media (max-width: 1080px) {
    .grid-vowels { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 880px) {
    .grid-vowels { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
    .grid-vowels { grid-template-columns: repeat(2, 1fr); }
}

.tray {
    position: relative;
    background: var(--c-cold-paper);
    border: 0.5px solid var(--c-mid-graph);
    padding: 18px 14px 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform var(--t-base) var(--ease-out),
                box-shadow var(--t-base) var(--ease-out);
    cursor: default;
}
.tray:hover {
    box-shadow: 10px 14px 28px -20px rgba(31,38,48,0.25);
}
.tray-stage {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
}
.tray-bowl {
    position: absolute;
    inset: 8% 4% 12%;
    background: var(--c-plate);
    border: 0.4px solid var(--c-mid-graph);
    border-radius: 4px;
    box-shadow: inset 0 6px 14px -10px rgba(31,38,48,0.25),
                inset 0 -1px 0 rgba(255,255,255,0.6);
}
.tray-bowl::after {
    content: "";
    position: absolute;
    left: 8%;
    right: 8%;
    bottom: -3px;
    height: 4px;
    background: linear-gradient(to bottom, rgba(31,38,48,0.10), transparent);
    border-radius: 50%;
    filter: blur(1px);
}
.tray-jamo {
    position: relative;
    font-family: var(--f-display);
    font-size: 3.6rem;
    color: var(--c-deep-ink);
    line-height: 1;
    z-index: 2;
    transition: transform var(--t-base) var(--ease-out),
                -webkit-text-stroke var(--t-base) var(--ease-out);
    filter: drop-shadow(1px 3px 0 rgba(31,38,48,0.10));
    -webkit-text-stroke: 0 var(--c-deep-ink);
}
.tray:hover .tray-jamo {
    transform: translate3d(0, -4px, 0);
    -webkit-text-stroke: 0.4px var(--c-deep-ink);
}

.tray-label {
    width: 100%;
    background: var(--c-aged-label);
    border: 0.4px solid #d4cdb6;
    padding: 6px 14px;
    margin-top: 6px;
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: baseline;
    gap: 10px;
    box-shadow: inset 1px 1px 0 rgba(255,255,255,0.45);
}
.tray-roman {
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 0.86rem;
    color: var(--c-deep-ink);
}
.tray-plate {
    font-family: var(--f-mono);
    font-size: 0.66rem;
    color: var(--c-slate);
}

/* ============================================================
   BAND 4 :: COMBINATORY WORKSHOP
   ============================================================ */
.workshop-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gutter);
}
@media (max-width: 980px) {
    .workshop-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .workshop-grid { grid-template-columns: 1fr; }
}

.assembly {
    position: relative;
    background: var(--c-plate);
    border: 0.5px solid var(--c-mid-graph);
    padding: 28px 24px 22px;
    display: flex;
    flex-direction: column;
    cursor: default;
    transition: box-shadow var(--t-base) var(--ease-out);
}
.assembly:hover {
    box-shadow: 14px 20px 38px -24px rgba(31,38,48,0.28);
}
.assy-stage {
    position: relative;
    aspect-ratio: 1 / 1.05;
    margin-bottom: 18px;
    display: grid;
    grid-template-rows: 1fr 1fr 1fr;
    align-items: center;
    justify-items: center;
}
.assy-piece {
    position: relative;
    font-family: var(--f-display);
    font-size: 2.6rem;
    color: var(--c-deep-ink);
    background: var(--c-cold-paper);
    border: 0.4px solid var(--c-mid-graph);
    width: 70%;
    aspect-ratio: 1 / 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    box-shadow: 4px 6px 0 -3px rgba(31,38,48,0.10);
    transition: transform var(--t-base) var(--ease-out);
}
.assembly:hover .assy-piece {
    transform: translate3d(0, -2px, 0);
}
.assy-piece small {
    position: absolute;
    top: 4px; left: 6px;
    font-family: var(--f-mono);
    font-size: 0.6rem;
    color: var(--c-slate);
    letter-spacing: 0.06em;
}
.assy-piece em {
    position: absolute;
    bottom: 3px; right: 6px;
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 0.62rem;
    color: var(--c-mid-graph);
}

.assy-stage::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 8%;
    bottom: 8%;
    width: 0;
    border-left: 0.5px dashed var(--c-draft-blue);
    transform: translateX(-50%);
    opacity: 0.55;
}
.assy-stage::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 6px; height: 6px;
    border: 0.5px solid var(--c-draft-blue);
    background: var(--c-cold-paper);
    border-radius: 50%;
}
/* arrows on stage */
.assy-arrow {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    color: var(--c-draft-blue);
    font-family: var(--f-mono);
    font-size: 0.7rem;
    background: var(--c-plate);
    padding: 0 4px;
}
.assy-arrow.up { top: 32%; }
.assy-arrow.down { top: 64%; }

/* result block */
.assy-result {
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    background: var(--c-cold-paper);
    border: 0.4px solid var(--c-mid-graph);
    box-shadow: inset 1px 1px 0 rgba(255,255,255,0.5);
}
.assy-syllable {
    font-family: var(--f-display);
    font-size: 3rem;
    color: var(--c-deep-ink);
    line-height: 1;
    padding-right: 14px;
    border-right: 0.4px dashed var(--c-mid-graph);
}
.assy-meaning {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.assy-meaning .am-en {
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 0.92rem;
    color: var(--c-deep-ink);
}
.assy-meaning .am-roman {
    font-family: var(--f-mono);
    font-size: 0.74rem;
    color: var(--c-slate);
}
.assy-meaning .am-ko {
    font-family: var(--f-ko);
    font-size: 0.78rem;
    color: var(--c-slate);
}

.assy-plate {
    position: absolute;
    top: 14px; right: 18px;
    font-family: var(--f-mono);
    font-size: 0.7rem;
    color: var(--c-mid-graph);
    letter-spacing: 0.06em;
}

/* ============================================================
   BAND 5 :: COLOPHON
   ============================================================ */
.band-colophon {
    padding-bottom: 56px;
}
.colophon-card {
    background: var(--c-plate);
    border: 0.5px solid var(--c-mid-graph);
    padding: 56px 64px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
    box-shadow: 28px 32px 64px -36px rgba(31,38,48,0.22);
}
@media (max-width: 980px) {
    .colophon-card {
        grid-template-columns: 1fr;
        padding: 40px;
        gap: 32px;
    }
}

.colo-title {
    font-family: var(--f-display);
    font-weight: 400;
    font-size: clamp(2.4rem, 4vw, 3.6rem);
    line-height: 1.05;
    letter-spacing: -0.01em;
    color: var(--c-deep-ink);
    margin-bottom: 22px;
}
.colo-title .t-ko { display: block; }
.colo-title .t-en {
    display: block;
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 0.5em;
    color: var(--c-slate);
    margin-top: 4px;
}

.colo-dl {
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-top: 0.5px solid var(--c-mid-graph);
    border-bottom: 0.5px solid var(--c-mid-graph);
    padding: 16px 0;
    margin-bottom: 22px;
}
.colo-row {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 16px;
    align-items: baseline;
}
.colo-row dt {
    font-family: var(--f-display2);
    font-variant: small-caps;
    text-transform: lowercase;
    letter-spacing: 0.1em;
    font-size: 0.78rem;
    color: var(--c-mid-graph);
}
.colo-row dd {
    font-family: var(--f-body);
    font-size: 0.92rem;
    color: var(--c-deep-ink);
}
.colo-row dd em { font-style: italic; }
.colo-sep { color: var(--c-mid-graph); margin: 0 6px; }
.cd-mono { font-family: var(--f-mono); font-size: 0.84rem; color: var(--c-slate); }

.colo-quote {
    font-family: var(--f-body);
    font-style: italic;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--c-slate);
    border-left: 1px solid var(--c-mid-graph);
    padding-left: 18px;
    margin-bottom: 14px;
}
.colo-quote-attrib {
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 0.82rem;
    color: var(--c-mid-graph);
    padding-left: 18px;
}

.colo-right {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}
.trigram-mark {
    width: 100%;
    max-width: 320px;
    height: auto;
    transition: transform 600ms var(--ease-out);
}
.colo-right:hover .trigram-mark {
    transform: rotate(2deg);
}
.mark-cap {
    font-family: var(--f-display2);
    font-size: 0.78rem;
    color: var(--c-mid-graph);
    text-align: center;
    font-style: italic;
}
.mark-cap em { font-style: italic; }

/* page foot */
.page-foot {
    margin-top: 42px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 24px;
    padding-top: 18px;
    border-top: 0.5px solid var(--c-mid-graph);
    font-family: var(--f-display2);
    font-size: 0.78rem;
    color: var(--c-slate);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.foot-left  { text-align: left; }
.foot-center { text-align: center; }
.foot-right { text-align: right; }
.foot-left em, .foot-right em { font-style: italic; color: var(--c-mid-graph); }

/* ============================================================
   isometric vitrine svg
   ============================================================ */
.box-walls {
    fill: var(--c-cold-paper);
    stroke: var(--c-slate);
    stroke-width: 0.75;
    vector-effect: non-scaling-stroke;
}
.box-glass {
    fill: rgba(125, 146, 173, 0.08);
    stroke: var(--c-slate);
    stroke-width: 0.4;
    vector-effect: non-scaling-stroke;
}
.box-shadow-pool {
    fill: rgba(31,38,48,0.10);
    stroke: none;
}
.box-wire {
    stroke: var(--c-mid-graph);
    stroke-width: 0.3;
    fill: none;
    vector-effect: non-scaling-stroke;
}

/* ---- tray meta strip (IPA + codepoint) ---- */
.tray-meta {
    width: 100%;
    margin-top: 4px;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    padding: 0 4px;
    font-family: var(--f-mono);
    font-size: 0.66rem;
    color: var(--c-mid-graph);
    letter-spacing: 0.04em;
}
.tray-meta .tm-ipa {
    color: var(--c-slate);
}
.tray-meta .tm-cp {
    color: var(--c-mid-graph);
}

/* ---- vitrine svg layer positioning ---- */
.vitrine-box-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: visible;
}

/* ---- mouth diagram svg styles ---- */
.mouth-svg {
    width: 100%;
    height: 100%;
    display: block;
}
.mouth-svg path,
.mouth-svg circle,
.mouth-svg line,
.mouth-svg ellipse {
    stroke: var(--c-draft-blue);
    fill: none;
    stroke-width: 0.75;
    vector-effect: non-scaling-stroke;
}
.mouth-svg text {
    fill: var(--c-draft-blue);
    font-family: var(--f-display2);
    font-style: italic;
    font-size: 8px;
    letter-spacing: 0.04em;
}

/* ---- tray "linked" highlight when primitive hovered ---- */
.tray.linked {
    box-shadow: 6px 8px 22px -16px rgba(125, 146, 173, 0.45),
                inset 0 0 0 0.5px var(--c-draft-blue);
}
.tray.linked .tray-jamo {
    color: var(--c-draft-blue);
    transition: color var(--t-base) var(--ease-out);
}

/* ---- is-revealed: touch / tap-to-reveal state ---- */
.vitrine.is-revealed .v-mouth { opacity: 0.85; }
.vitrine.is-revealed .v-jamo { transform: translate3d(0, -4px, 0); }
.vitrine.is-revealed .v-jamo .jamo-glyph {
    -webkit-text-stroke: 0.5px var(--c-deep-ink);
    filter: drop-shadow(2px 10px 4px rgba(31,38,48,0.18));
}
.tray.is-revealed .tray-jamo {
    transform: translate3d(0, -4px, 0);
    -webkit-text-stroke: 0.4px var(--c-deep-ink);
}

/* ---- pin sheen (JS-applied) ---- */
.v-nameplate.pin-lit::before,
.v-nameplate.pin-lit::after {
    transform: translateY(-1px);
    box-shadow:
        0 2px 0 rgba(31,38,48,0.30),
        inset -1px -1px 0 rgba(31,38,48,0.20),
        inset 1px 1px 0 rgba(255,251,230,0.7);
}

/* ---- connector path appearance ---- */
.prim-connectors path {
    stroke: var(--c-draft-blue);
    fill: none;
    stroke-width: 0.75;
    vector-effect: non-scaling-stroke;
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    opacity: 0;
    transition:
        stroke-dashoffset 400ms var(--ease-out),
        opacity 240ms var(--ease-out);
}
.prim-connectors path.active {
    stroke-dashoffset: 0;
    opacity: 0.8;
}

/* small responsive tightening */
@media (max-width: 640px) {
    .running-head { padding: 16px 22px 12px; font-size: 0.7rem; }
    .band { padding: 64px 22px 56px; }
    .band-meta { font-size: 0.66rem; }
    .v-jamo .jamo-glyph { font-size: 4.2rem; }
    .tray-jamo { font-size: 2.8rem; }
    .assy-piece { font-size: 2rem; }
}