/* ============================================================
   hangul.name — A scholarly folio of seven plates
   Palette
     #f5efdf  hanji-cream      (page background)
     #1c1714  song-yeon-mug    (pine-soot ink)
     #7a3328  jujak-russet     (red-phoenix accent)
     #5a6850  songhwa-pine     (pine-needle green)
     #c9b78a  bo-ja-gi-tan     (silk wrapping cloth tan)
     #e8dcc1  yeobaek-shadow   (margin shadow)
   Fonts
     Noto Serif KR  — Korean primary (myeongjo)
     Nanum Myeongjo — Korean pull-text
     Cormorant Garamond — Latin display
     JetBrains Mono — quiet accent
   ============================================================ */

:root {
    --hanji:    #f5efdf;
    --ink:      #1c1714;
    --jujak:    #7a3328;
    --songhwa:  #5a6850;
    --bojagi:   #c9b78a;
    --yeobaek:  #e8dcc1;

    --margin-w: 56px;
    --ease-ink: cubic-bezier(0.22, 0.61, 0.36, 1);

    --serif-kr:    "Noto Serif KR", "Nanum Myeongjo", Georgia, serif;
    --pull-kr:     "Nanum Myeongjo", "Noto Serif KR", Georgia, serif;
    --serif-latin: "Cormorant Garamond", "Noto Serif KR", Georgia, serif;
    --mono:        "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    padding: 0;
    background: var(--hanji);
    color: var(--ink);
    font-family: var(--serif-kr);
    font-size: 17px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    /* Hanji fiber texture: very low-contrast noise via SVG, ~4% opacity */
    background-image:
        radial-gradient(circle at 18% 22%, rgba(28,23,20,0.018) 0, transparent 60%),
        radial-gradient(circle at 80% 70%, rgba(28,23,20,0.02) 0, transparent 60%),
        url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.11   0 0 0 0 0.09   0 0 0 0 0.078   0 0 0 0.04 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
    background-size: auto, auto, 240px 240px;
}

/* ---------- Outer mulberry-paper margins ---------- */

.margin {
    position: fixed;
    top: 0;
    bottom: 0;
    width: var(--margin-w);
    background:
        linear-gradient(90deg, rgba(232, 220, 193, 0.55), rgba(232, 220, 193, 0.0));
    pointer-events: none;
    z-index: 5;
}
.margin-right {
    right: 0;
    background:
        linear-gradient(270deg, rgba(232, 220, 193, 0.55), rgba(232, 220, 193, 0.0));
}
.margin-left  { left: 0; pointer-events: auto; }

.margin-numerals {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    gap: 80px;
    align-items: center;
    pointer-events: auto;
}
.margin-num {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink);
    opacity: 0.34;
    letter-spacing: 0.06em;
    cursor: pointer;
    transition: opacity 0.6s var(--ease-ink), color 0.6s var(--ease-ink);
}
.margin-num:hover { opacity: 0.9; color: var(--jujak); }
.margin-num.is-active { opacity: 1; color: var(--jujak); }

/* ---------- Floating jamo-index ---------- */

.jamo-index {
    position: fixed;
    right: calc(var(--margin-w) + 8px);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 22px;
    z-index: 8;
    opacity: 0;
    transition: opacity 0.9s var(--ease-ink);
    pointer-events: none;
}
.jamo-index.is-shown {
    opacity: 1;
    pointer-events: auto;
}
.jamo-dot {
    width: 4px;
    height: 4px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: var(--ink);
    opacity: 0.4;
    cursor: pointer;
    animation: dot-pulse 3.5s ease-in-out infinite;
    transition: width 0.8s var(--ease-ink), height 0.8s var(--ease-ink), opacity 0.8s var(--ease-ink), background 0.8s var(--ease-ink);
    position: relative;
}
.jamo-dot:hover { opacity: 0.85; }
.jamo-dot.is-active {
    width: 6px;
    height: 6px;
    opacity: 1;
    background: var(--jujak);
    animation: none;
}
.jamo-dot::after {
    content: attr(data-label);
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s var(--ease-ink);
    white-space: nowrap;
}
.jamo-dot:hover::after,
.jamo-dot.is-active::after { opacity: 0.55; }

@keyframes dot-pulse {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 0.65; }
}

/* ---------- Folio ---------- */

.folio {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 calc(var(--margin-w) + 32px);
    position: relative;
}

.plate {
    position: relative;
    min-height: 130vh;
    padding: 12vh 0 8vh;
    scroll-margin-top: 40px;
    display: flex;
    flex-direction: column;
}

.plate-marker {
    display: flex;
    align-items: baseline;
    gap: 14px;
    color: var(--ink);
    opacity: 0.55;
    margin-bottom: 4vh;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
}
.plate-marker .numeral {
    font-family: var(--mono);
    font-size: 0.95rem;
    color: var(--jujak);
}
.plate-marker .marker-label {
    font-family: var(--serif-latin);
    font-weight: 300;
}
.plate-marker em { font-style: italic; }

.plate-head {
    margin-bottom: 6vh;
    max-width: 56ch;
}

.plate-title {
    font-family: var(--serif-kr);
    font-weight: 600;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    line-height: 1.25;
    letter-spacing: 0;
    margin: 0 0 0.6em;
    color: var(--ink);
}

.plate-sub {
    font-family: var(--serif-latin);
    font-weight: 300;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--ink);
    opacity: 0.78;
    margin: 0;
}
.plate-sub em { font-style: italic; opacity: 0.85; }

.binding-stitch {
    display: flex;
    gap: 18px;
    justify-content: center;
    margin-top: auto;
    padding-top: 6vh;
    opacity: 0.45;
}
.binding-stitch span {
    width: 18px;
    height: 1px;
    background: var(--ink);
    display: block;
}

.mono { font-family: var(--mono); letter-spacing: 0.04em; font-size: 0.75rem; }

/* ============================================================
   Plate 一  ·  Beginning
   ============================================================ */

.plate-one-grid {
    display: grid;
    grid-template-columns: 5fr 4fr;
    gap: 6vw;
    align-items: center;
    flex: 1;
    margin-top: 4vh;
}

.entry-character {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1 / 1;
    position: relative;
}
.han-sculpture {
    width: 100%;
    max-width: 480px;
    height: auto;
    display: block;
    cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'><path d='M2 14 L10 6 L11 7 L3 15 Z' fill='%231c1714'/><circle cx='12' cy='4' r='1.4' fill='%231c1714'/></svg>") 0 16, auto;
}
.han-static {
    font-family: var(--serif-kr);
    font-weight: 600;
    font-size: 320px;
    fill: var(--ink);
}

.entry-prose {
    padding-left: 2vw;
    border-left: 1px solid rgba(28, 23, 20, 0.18);
    padding-top: 12px;
    padding-bottom: 12px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.9s var(--ease-ink), transform 1.2s var(--ease-ink);
}
.entry-prose.is-revealed {
    opacity: 1;
    transform: translateY(0);
}
.entry-lead {
    font-family: var(--serif-kr);
    font-size: 1.0625rem;
    line-height: 1.85;
    margin: 0 0 1.4em;
    color: var(--ink);
}
.entry-lead em {
    font-family: var(--serif-latin);
    font-style: italic;
    font-weight: 300;
    color: var(--ink);
    opacity: 0.78;
}
.entry-meta {
    font-family: var(--mono);
    color: var(--ink);
    opacity: 0.5;
    margin: 0;
}

/* ============================================================
   Plate 二  ·  Atlas of Jamo
   ============================================================ */

.jamo-atlas {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px 20px;
    margin: 4vh 0 4vh;
    max-width: 920px;
}
.jamo-cell {
    position: relative;
    padding: 32px 8px 22px;
    margin-top: var(--off, 0);
    text-align: center;
    cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'><path d='M2 14 L10 6 L11 7 L3 15 Z' fill='%231c1714'/><circle cx='12' cy='4' r='1.4' fill='%231c1714'/></svg>") 0 16, auto;
    transition: transform 0.6s var(--ease-ink);
    min-height: 140px;
}
.jamo-cell .jamo {
    font-family: var(--serif-kr);
    font-weight: 400;
    font-size: 4.4rem;
    line-height: 1;
    color: var(--ink);
    display: inline-block;
    transition: transform 0.6s var(--ease-ink), color 0.6s var(--ease-ink);
}
.jamo-cell:hover .jamo {
    transform: scale(1.06);
}
.jamo-cell::before {
    content: "";
    position: absolute;
    left: 0; right: 0; top: 0;
    height: 1px;
    background: var(--ink);
    opacity: 0.12;
}
.jamo-cell::after {
    content: attr(data-name) "  ·  " attr(data-class) "  ·  " attr(data-year);
    position: absolute;
    left: 0; right: 0;
    bottom: -4px;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    color: var(--ink);
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.6s var(--ease-ink), transform 0.6s var(--ease-ink);
    pointer-events: none;
}
.jamo-cell:hover::after {
    opacity: 0.7;
    transform: translateY(0);
}
.jamo-cell:hover::before {
    background: var(--jujak);
    opacity: 0.55;
}

.atlas-legend {
    margin-top: 3vh;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink);
    opacity: 0.55;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.atlas-legend .sep { color: var(--jujak); opacity: 0.6; }

/* ============================================================
   Plate 三  ·  Breath
   ============================================================ */

.breath-grid {
    display: grid;
    grid-template-columns: 1fr 28%;
    gap: 6vw;
    align-items: center;
    flex: 1;
    margin-top: 4vh;
}

.breath-figure {
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
}
.breath-svg {
    width: 100%;
    max-width: 460px;
    height: auto;
    display: block;
}
.breath-cap {
    color: var(--ink);
    opacity: 0.55;
}
.breath-cap span { color: var(--jujak); opacity: 0.85; }

.breath-text p {
    font-family: var(--serif-kr);
    font-size: 1.0625rem;
    line-height: 1.85;
    margin: 0 0 1.4em;
}
.breath-text .quote {
    font-family: var(--pull-kr);
    font-size: 1.5rem;
    line-height: 1.6;
    color: var(--ink);
    border-top: 1px solid rgba(28, 23, 20, 0.22);
    padding-top: 1.4em;
    margin-top: 1.4em;
}
.breath-text .quote em {
    font-style: normal;
    color: var(--jujak);
}
.breath-text .quote .mono {
    color: var(--ink);
    opacity: 0.55;
    display: inline-block;
    margin-top: 0.6em;
}

/* ============================================================
   Plate 四  ·  Tree
   ============================================================ */

.tree-frame {
    width: 100%;
    max-width: 880px;
    margin: 4vh auto 0;
    padding: 24px 0;
    border-top: 1px solid rgba(28, 23, 20, 0.18);
    border-bottom: 1px solid rgba(28, 23, 20, 0.18);
}
.tree-svg {
    width: 100%;
    height: auto;
    display: block;
}
.tree-line {
    stroke: var(--songhwa);
    stroke-width: 1;
    fill: none;
    stroke-linecap: round;
}
.tree-glyph {
    font-family: var(--serif-kr);
    font-weight: 400;
    font-size: 22px;
    fill: var(--ink);
}
.tree-root-label {
    font-size: 11px;
    fill: var(--ink);
    opacity: 0.5;
}
.tree-ghost {
    font-family: var(--serif-kr);
    font-size: 22px;
    fill: var(--jujak);
    opacity: 0.25;
}
.tree-ghost-label {
    font-size: 10px;
    fill: var(--jujak);
    opacity: 0.55;
}

/* ============================================================
   Plate 五  ·  Composition
   ============================================================ */

.comp-stage {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    margin-top: 4vh;
}

.comp-block {
    position: relative;
    width: 240px;
    height: 240px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 0;
    border: 1px solid rgba(28, 23, 20, 0.18);
    background:
        linear-gradient(0deg, rgba(232, 220, 193, 0.25), rgba(232, 220, 193, 0.0));
    transition: border-color 0.8s var(--ease-ink);
}

.comp-block.is-assembled {
    border-color: var(--jujak);
}

.comp-jamo {
    font-family: var(--serif-kr);
    font-weight: 600;
    color: var(--ink);
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translate(0, 0);
    transition: opacity 0.9s var(--ease-ink), transform 1.1s var(--ease-ink);
}

/* default 2x2 placement: top-left, top-right occupies first row;
   bottom spans full row */
.comp-jamo.j-tl { grid-column: 1; grid-row: 1; font-size: 5.2rem; }
.comp-jamo.j-tr { grid-column: 2; grid-row: 1; font-size: 5.2rem; }
.comp-jamo.j-bl { grid-column: 1 / span 2; grid-row: 2; font-size: 5.4rem; }

/* "stacked" composition (e.g. 글: top-bottom-bottom) */
.comp-block.layout-stacked .j-tl { grid-column: 1 / span 2; grid-row: 1; }
.comp-block.layout-stacked .j-tr { grid-column: 1 / span 2; grid-row: 2; font-size: 4.2rem; }
.comp-block.layout-stacked .j-bl { grid-column: 1 / span 2; grid-row: 2; opacity: 0; }
.comp-block.layout-stacked.is-assembled .j-bl { display: none; }

/* "duo" composition (e.g. 자: ㅈ + ㅏ side-by-side, no bottom) */
.comp-block.layout-duo .j-tl { grid-column: 1; grid-row: 1 / span 2; font-size: 6rem; }
.comp-block.layout-duo .j-tr { grid-column: 2; grid-row: 1 / span 2; font-size: 6rem; }
.comp-block.layout-duo .j-bl { display: none; }

/* incoming positions (off-block) */
.comp-jamo.is-arriving { opacity: 0; }
.comp-jamo.j-tl.is-arriving { transform: translateX(-180px); }
.comp-jamo.j-tr.is-arriving { transform: translateX(180px); }
.comp-jamo.j-bl.is-arriving { transform: translateY(160px); }

.comp-jamo.is-settled {
    opacity: 1;
    transform: translate(0, 0);
}

.comp-caption {
    color: var(--ink);
    opacity: 0.65;
    transition: opacity 0.6s var(--ease-ink);
}

/* ============================================================
   Plate 六  ·  Type Case
   ============================================================ */

.type-case {
    position: relative;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    background: var(--bojagi);
    background-image:
        repeating-linear-gradient(90deg,
            rgba(28, 23, 20, 0.06) 0px,
            rgba(28, 23, 20, 0.06) 1px,
            transparent 1px,
            transparent 12px),
        linear-gradient(180deg, rgba(28, 23, 20, 0.05), rgba(28, 23, 20, 0));
    border-top: 1px solid rgba(28, 23, 20, 0.25);
    border-bottom: 1px solid rgba(28, 23, 20, 0.25);
    padding: 28px 0;
    margin-top: 4vh;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
}

.type-case::-webkit-scrollbar {
    height: 8px;
    background: rgba(28, 23, 20, 0.05);
}
.type-case::-webkit-scrollbar-thumb {
    background: rgba(28, 23, 20, 0.25);
    border-radius: 4px;
}

.type-track {
    display: inline-flex;
    gap: 14px;
    padding: 0 calc(var(--margin-w) + 32px);
    height: 260px;
}

.wood-block {
    flex: 0 0 auto;
    width: 100px;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background:
        linear-gradient(135deg, rgba(28, 23, 20, 0.10), rgba(28, 23, 20, 0.0) 30%),
        linear-gradient(180deg, #d3c194, #b69e6f);
    border: 1px solid rgba(28, 23, 20, 0.45);
    box-shadow:
        inset 0 1px 0 rgba(255, 248, 224, 0.5),
        inset 0 -2px 0 rgba(28, 23, 20, 0.18);
    scroll-snap-align: start;
    cursor: pointer;
    position: relative;
    transition: transform 0.4s var(--ease-ink), box-shadow 0.4s var(--ease-ink);
}
.wood-block::before {
    /* relief carving: faint diagonal hatch */
    content: "";
    position: absolute;
    inset: 8px;
    background-image: repeating-linear-gradient(45deg,
        rgba(28, 23, 20, 0.0) 0,
        rgba(28, 23, 20, 0.0) 4px,
        rgba(28, 23, 20, 0.06) 4px,
        rgba(28, 23, 20, 0.06) 5px);
    pointer-events: none;
}
.wood-block:hover {
    transform: translateY(-4px);
    box-shadow:
        0 8px 12px -6px rgba(28, 23, 20, 0.35),
        inset 0 1px 0 rgba(255, 248, 224, 0.6),
        inset 0 -2px 0 rgba(28, 23, 20, 0.22);
}
.block-jamo {
    font-family: var(--serif-kr);
    font-weight: 600;
    font-size: 3.4rem;
    color: var(--ink);
    line-height: 1;
}
.block-num {
    color: var(--ink);
    opacity: 0.55;
    font-size: 0.65rem;
}

.hint-arrow { display: inline-block; transform: translateY(1px); animation: hint-nudge 2.6s ease-in-out infinite; color: var(--jujak); }
@keyframes hint-nudge {
    0%, 100% { transform: translate(0, 1px); opacity: 0.6; }
    50%      { transform: translate(8px, 1px); opacity: 1; }
}

/* ============================================================
   Plate 七  ·  Closing
   ============================================================ */

.plate-seven {
    min-height: 90vh;
    align-items: center;
    justify-content: center;
}

.closing {
    margin: auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.4rem;
    padding: 6vh 0;
}

.closing-line {
    font-family: var(--pull-kr);
    font-size: clamp(1.4rem, 2.4vw, 1.9rem);
    color: var(--ink);
    margin: 0;
    letter-spacing: 0.02em;
}

.closing-rule {
    width: 320px;
    height: 6px;
    display: block;
}

.seal {
    width: 32px;
    height: 32px;
    background: var(--jujak);
    color: var(--hanji);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--serif-kr);
    font-weight: 600;
    font-size: 18px;
    box-shadow:
        inset 0 0 0 1px rgba(245, 239, 223, 0.35);
    opacity: 0;
    transform: scale(0.85);
    transition: opacity 1.2s var(--ease-ink), transform 1.2s var(--ease-ink);
    position: relative;
}
.seal::after {
    /* irregular ink-bleed corners */
    content: "";
    position: absolute;
    inset: -2px;
    background:
        radial-gradient(circle at 12% 14%, rgba(122, 51, 40, 0.45) 0, transparent 28%),
        radial-gradient(circle at 88% 82%, rgba(122, 51, 40, 0.45) 0, transparent 28%);
    pointer-events: none;
}
.seal-char {
    font-family: var(--serif-kr);
    line-height: 1;
}
.seal.is-revealed { opacity: 1; transform: scale(1); }

.closing-meta {
    color: var(--ink);
    opacity: 0.5;
}
.closing-meta em {
    font-family: var(--serif-latin);
    font-style: italic;
}

/* ============================================================
   Reduced motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001s !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001s !important;
    }
    html { scroll-behavior: auto; }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 880px) {
    :root { --margin-w: 28px; }
    .folio { padding: 0 calc(var(--margin-w) + 18px); }

    .plate-one-grid { grid-template-columns: 1fr; gap: 4vh; }
    .han-static { font-size: 220px; }
    .entry-prose { border-left: none; padding-left: 0; border-top: 1px solid rgba(28, 23, 20, 0.18); padding-top: 18px; }

    .jamo-atlas { grid-template-columns: repeat(3, 1fr); gap: 18px 14px; }

    .breath-grid { grid-template-columns: 1fr; gap: 4vh; }

    .jamo-index { right: 8px; gap: 16px; }
    .margin-numerals { display: none; }
}