/* haru.plus — the Vellum Folio
   Palette (strict warm-monochrome):
   #f4ede1 Vellum  | #ece2d0 Sun-bleached | #d4c8b8 Foxing
   #6b5d50 Graphite | #2a2520 Sepia ink   | #0e0c0a Closed-book
*/

:root {
    --vellum: #f4ede1;
    --sunbleached: #ece2d0;
    --foxing: #d4c8b8;
    --graphite: #6b5d50;
    --sepia: #2a2520;
    --closedbook: #0e0c0a;

    --serif: "Cormorant Garamond", Georgia, serif;
    --mono: "JetBrains Mono", "Courier New", monospace;
    --inria: "Inria Serif", Georgia, serif;
    --kr: "Nanum Myeongjo", serif;
}

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

html, body {
    background: var(--vellum);
    color: var(--sepia);
    font-family: var(--serif);
    overflow-x: hidden;
}

body {
    min-height: 130vh;
    padding: 0;
    position: relative;
    cursor: default;
}

/* ---------- macro grid ---------- */
.sheet {
    display: grid;
    grid-template-columns: 96px 1fr 32px;
    min-height: 130vh;
    padding: 64px 0 128px;
    position: relative;
}

/* ---------- registration / crop marks ---------- */
.reg {
    font-family: var(--mono);
    font-weight: 400;
    color: var(--foxing);
    user-select: none;
    pointer-events: none;
    transition: color 200ms ease;
    line-height: 1;
}
.reg.lit { color: var(--graphite); }

.vp-mark {
    position: fixed;
    font-size: 8px;
    z-index: 5;
}
.vp-tl { top: 10px; left: 10px; }
.vp-tr { top: 10px; right: 10px; }
.vp-bl { bottom: 10px; left: 10px; }
.vp-br { bottom: 10px; right: 10px; }

.anchor {
    position: absolute;
    font-size: 9px;
    z-index: 2;
}

/* ---------- left gutter ---------- */
.gutter-left {
    position: relative;
}
.rule-tick {
    position: absolute;
    left: 40px;
    width: 18px;
    height: 1px;
    background: var(--foxing);
}
.gutter-label {
    position: absolute;
    bottom: 40px;
    left: 32px;
    transform-origin: left bottom;
    transform: rotate(-90deg);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--graphite);
    white-space: nowrap;
}

/* ---------- center type block ---------- */
.typeblock {
    width: 100%;
    max-width: 56ch;
    margin: 0 auto;
}

/* ---------- folio head ---------- */
.folio-head {
    position: relative;
    padding: 24px 0 56px;
    text-align: left;
}
.haru-watermark {
    position: absolute;
    top: -8px;
    left: -8px;
    font-family: var(--kr);
    font-size: 9rem;
    line-height: 1;
    color: var(--sunbleached);
    z-index: 0;
    user-select: none;
    pointer-events: none;
}
.date-glyph {
    position: relative;
    z-index: 1;
    font-family: var(--inria);
    font-weight: 300;
    font-style: italic;
    font-size: 3.25rem;
    color: var(--closedbook);
    letter-spacing: 0.01em;
}
.folio-meta {
    position: relative;
    z-index: 1;
    margin-top: 14px;
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--graphite);
}

/* ---------- plate ---------- */
.plate {
    position: relative;
    padding: 28px 18px;
    margin: 0 0 0;
}
.crop {
    position: absolute;
    font-size: 8px;
    opacity: 0.7;
}
.crop-tl { top: 0; left: 0; }
.crop-tr { top: 0; right: 0; }
.crop-bl { bottom: 0; left: 0; }
.crop-br { bottom: 0; right: 0; }

/* ---------- spread (left prose / right marginalia) ---------- */
.spread {
    display: grid;
    grid-template-columns: 56ch 24px 1fr;
    align-items: start;
}
.page-left { grid-column: 1; }
.gutter-shadow {
    grid-column: 2;
    align-self: stretch;
    width: 1px;
    margin: 0 auto;
    background: linear-gradient(to right, transparent, var(--foxing), transparent);
    height: 100%;
}
.page-right { grid-column: 3; }

/* ---------- reading body ---------- */
.page-left p {
    font-size: 1.0625rem;
    line-height: 1.85;
    letter-spacing: 0.005em;
    margin-bottom: 1.5rem;
}
.lede { text-indent: 0; }
.dropcap {
    float: left;
    font-family: var(--inria);
    font-weight: 300;
    font-style: italic;
    font-size: 3.4rem;
    line-height: 0.86;
    padding: 0.08em 0.08em 0 0;
    color: var(--closedbook);
}
.page-left em {
    font-style: italic;
    font-weight: 500;
}
.closing {
    font-style: italic;
    color: var(--graphite);
}
.footnote {
    font-size: 0.92rem !important;
    line-height: 1.6 !important;
    color: var(--graphite);
    border-top: 1px solid var(--foxing);
    padding-top: 1rem;
}
.fn-mk, .mk { font-family: var(--mono); }
.fn-ref {
    font-family: var(--mono);
    font-size: 0.72rem;
    vertical-align: super;
    color: var(--graphite);
    text-decoration: none;
}
.fn-ref:hover { color: var(--sepia); }

/* glossed terms */
.gloss {
    position: relative;
    cursor: help;
    border-bottom: 1px dotted var(--foxing);
}
.gloss .mk {
    font-size: 0.7rem;
    vertical-align: super;
    color: var(--graphite);
}

/* the only "button" */
.continue { margin-top: 2.5rem; }
.continue-link {
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    color: var(--graphite);
    text-decoration: none;
    transition: color 200ms ease;
}
.continue-link:hover { color: var(--sepia); }

/* ---------- marginalia ---------- */
.marginalia {
    font-family: var(--mono);
    color: var(--graphite);
}
.m-line {
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    line-height: 1.7;
    margin-bottom: 0.9rem;
}
.m-time { color: var(--sepia); }
.m-sym {
    cursor: help;
    color: var(--sepia);
}
.diagram-wrap {
    margin: 1.6rem 0;
    padding: 0.4rem 0;
}
.diagram { display: block; }
.diagram-cap {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    color: var(--graphite);
}

/* ---------- column rule ---------- */
.rule-col {
    border: none;
    border-top: 1px solid var(--foxing);
    width: 56ch;
    max-width: 100%;
    margin: 40px auto;
}

/* ---------- quiet plate ---------- */
.plate-quiet .aside-prose {
    max-width: 56ch;
    margin: 0 auto;
    font-size: 1.0625rem;
    line-height: 1.85;
    font-style: italic;
    color: var(--graphite);
}

/* ---------- colophon ---------- */
.colophon {
    position: relative;
    padding: 32px 18px;
    margin-top: 24px;
}
.colophon p {
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    color: var(--graphite);
    line-height: 1.8;
    max-width: 56ch;
}

/* ---------- right gutter / folio-tabs ---------- */
.gutter-right {
    position: relative;
}
.folio-tabs {
    position: fixed;
    top: 50%;
    right: 6px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 28px;
    z-index: 6;
}
.tab {
    text-decoration: none;
    color: var(--sepia);
    transform: rotate(90deg);
    transform-origin: center;
    white-space: nowrap;
}
.tab span {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding-bottom: 3px;
    position: relative;
}
.tab span::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    height: 1px;
    width: 0;
    background: var(--graphite);
    transition: width 320ms cubic-bezier(0.2,0.7,0.2,1);
}
.tab:hover span::after,
.tab.active span::after { width: 100%; }

.gutter-folio {
    position: fixed;
    bottom: 40px;
    right: 8px;
    transform-origin: right bottom;
    transform: rotate(-90deg);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--graphite);
    white-space: nowrap;
    z-index: 6;
}

/* ---------- off-canvas index ---------- */
.offcanvas-index {
    position: fixed;
    top: 0;
    right: 0;
    width: min(420px, 80vw);
    height: 100vh;
    background: var(--sunbleached);
    border-left: 1px solid var(--foxing);
    padding: 96px 48px;
    transform: translateX(100%);
    transition: transform 420ms cubic-bezier(0.2,0.7,0.2,1);
    z-index: 4;
    overflow-y: auto;
}
.offcanvas-index.open { transform: translateX(0); }
.oi-head, .oi-foot {
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--graphite);
    margin-bottom: 2rem;
}
.oi-foot { margin-top: 2.5rem; margin-bottom: 0; }
.oi-list { list-style: none; }
.oi-list li {
    font-family: var(--serif);
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-bottom: 1.1rem;
    color: var(--sepia);
}
.oi-list li em { font-style: italic; color: var(--graphite); }
.oi-no {
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--graphite);
}
.oi-mark.today-mark {
    display: inline-block;
    width: 18px;
    height: 1.5px;
    background: var(--graphite);
    vertical-align: middle;
    margin: 0 4px;
}

/* ---------- cursor companion ---------- */
.witness {
    position: fixed;
    top: 0; left: 0;
    width: 28px; height: 28px;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%) scale(0.5);
    transition: transform 240ms cubic-bezier(0.2,0.7,0.2,1), opacity 240ms ease;
}
.witness.engaged {
    transform: translate(-50%, -50%) scale(1) rotate(45deg);
}
.witness.drifting { opacity: 0.4; }

/* hide native cursor over the reading column only */
.page-left, .aside-prose, .colophon p { cursor: none; }
.page-left a, .gloss, .m-sym, .continue-link, .tab { cursor: pointer; }

/* ---------- tooltip ---------- */
.tip {
    position: fixed;
    z-index: 10000;
    background: var(--sepia);
    color: var(--vellum);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.06em;
    padding: 4px 8px;
    pointer-events: none;
    opacity: 0;
    transform: translate(-50%, -130%);
    transition: opacity 160ms ease;
    white-space: nowrap;
}
.tip.show { opacity: 1; }

/* ---------- scroll fade-in ---------- */
[data-plate] {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 800ms ease, transform 800ms ease;
}
[data-plate].in {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- responsive: collapse spread ---------- */
@media (max-width: 900px) {
    .sheet { grid-template-columns: 56px 1fr 24px; padding: 48px 0 96px; }
    .spread { display: block; }
    .page-left { width: 100%; max-width: 56ch; }
    .gutter-shadow { display: none; }
    .marginalia {
        margin-top: 2rem;
        padding-left: 24px;
        border-left: 1px solid var(--foxing);
    }
    .m-line::before { content: "> "; color: var(--graphite); }
    .m-line .m-sym::before, .m-line .m-time::before { content: none; }
    .haru-watermark { font-size: 6rem; }
    .date-glyph { font-size: 2.4rem; }
    .rule-col, .plate-quiet .aside-prose, .colophon p { width: 100%; }
}

@media (max-width: 560px) {
    .sheet { grid-template-columns: 0 1fr 0; padding: 40px 20px 80px; }
    .gutter-left, .gutter-folio { display: none; }
    .haru-watermark { font-size: 4.5rem; }
}