/* ============================================================
   doublestandard.xyz
   A Study in Contradiction
   ============================================================ */

:root {
    /* Palette */
    --bg-recto: #0D0A0E;        /* Midnight Recto (left) */
    --bg-verso: #1A0F14;        /* Midnight Verso (right) */
    --bg-aubergine: #110C10;    /* Aubergine Dark */
    --bg-void: #080608;         /* Terminal black */
    --oxblood: #4A0E1B;         /* Spine / structural */
    --vellum: #D4C9B8;          /* Aged Vellum text */
    --gold: #A8923A;            /* Tarnished Gold heading */
    --burgundy: #6B1020;        /* Deep Burgundy accent */
    --burgundy-light: #8B2030;  /* Lighter wax-seal center */
    --silver: #8B8FA0;          /* Tarnished Silver */

    /* Typography */
    --ff-display: "Playfair Display", "Times New Roman", serif;
    --ff-body: "Cormorant Garamond", "Georgia", serif;
    --ff-gloss: "EB Garamond", "Georgia", serif;

    /* Live background driven by IntersectionObserver */
    --body-bg-left: var(--bg-recto);
    --body-bg-right: var(--bg-verso);
}

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

html {
    scroll-behavior: auto;
    background: var(--bg-void);
}

body {
    font-family: var(--ff-body);
    font-feature-settings: 'onum' 1, 'liga' 1;
    color: var(--vellum);
    background:
        linear-gradient(
            to right,
            var(--body-bg-left) 0%,
            var(--body-bg-left) 50%,
            var(--body-bg-right) 50%,
            var(--body-bg-right) 100%
        );
    transition: background 1200ms ease;
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.65;
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================
   The Spine - persistent fixed vertical bisector
   ============================================================ */
.spine {
    position: fixed;
    top: 0;
    left: 50vw;
    width: 1px;
    height: 100vh;
    background: var(--oxblood);
    pointer-events: none;
    z-index: 5;
    transform: translateX(-0.5px);
}

/* Spine fades at the bottom of the colophon */
.spine.spine-fading::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 1px;
    height: 20vh;
    background: linear-gradient(to bottom, var(--oxblood) 0%, transparent 100%);
}

/* ============================================================
   Quire signatures - navigation tick marks on the spine
   ============================================================ */
.quire {
    position: fixed;
    top: 50%;
    left: 50vw;
    transform: translate(-50%, -50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
    pointer-events: none;
}

.quire-mark {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 6px;
    pointer-events: auto;
}

.quire-tick {
    width: 12px;
    height: 6px;
    border: 1px solid var(--oxblood);
    background: transparent;
    transition: background 300ms ease, border-color 300ms ease;
}

.quire-mark.is-active .quire-tick,
.quire-mark.is-passed .quire-tick {
    background: var(--burgundy);
    border-color: var(--burgundy);
}

.quire-label {
    position: absolute;
    left: 22px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--ff-gloss);
    font-style: italic;
    font-size: 0.6rem;
    color: var(--vellum);
    opacity: 0.45;
    letter-spacing: 0.06em;
    transition: opacity 300ms ease, color 300ms ease;
    white-space: nowrap;
}

.quire-mark.is-active .quire-label {
    color: var(--gold);
    opacity: 1;
}

/* ============================================================
   Folio (section) base
   ============================================================ */
.codex {
    position: relative;
    z-index: 1;
}

.folio {
    position: relative;
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1px 1fr;
    grid-template-rows: auto;
    column-gap: 0;
    padding: 8vh 0;
    opacity: 0;
    transition: opacity 800ms cubic-bezier(0.16, 1, 0.3, 1);
}

.folio.is-visible {
    opacity: 1;
}

.folio-side {
    position: relative;
    padding: 2rem clamp(1.5rem, 5vw, 5rem);
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 0;
}

.folio-left {
    grid-column: 1;
    align-items: flex-end;
    text-align: right;
    transform: translateX(-30px);
    transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
                transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.folio-right {
    grid-column: 3;
    align-items: flex-start;
    text-align: left;
    transform: translateX(30px);
    transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1) 200ms,
                transform 600ms cubic-bezier(0.16, 1, 0.3, 1) 200ms;
}

.folio.is-visible .folio-left,
.folio.is-visible .folio-right {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================================
   Marginal glosses (in the margins, outside content columns)
   ============================================================ */
.gloss {
    position: absolute;
    top: 6vh;
    font-family: var(--ff-gloss);
    font-style: italic;
    font-size: clamp(0.7rem, 1.1vw, 0.82rem);
    color: var(--vellum);
    opacity: 0;
    letter-spacing: 0.02em;
    line-height: 1.5;
    max-width: 16ch;
    transition: opacity 300ms cubic-bezier(0.25, 0.1, 0.25, 1.0) 400ms;
    pointer-events: none;
}

.gloss-left {
    left: clamp(0.75rem, 2vw, 2rem);
    text-align: right;
    border-right: 1px solid var(--oxblood);
    padding-right: 0.6rem;
}

.gloss-right {
    right: clamp(0.75rem, 2vw, 2rem);
    text-align: left;
    border-left: 1px solid var(--oxblood);
    padding-left: 0.6rem;
}

.folio.is-visible .gloss {
    opacity: 0.7;
}

/* ============================================================
   Pilcrow / Section sign decorations
   ============================================================ */
.pilcrow {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    color: var(--gold);
    font-family: var(--ff-display);
    font-size: 1.5rem;
    line-height: 1;
    z-index: 6;
    background: var(--bg-aubergine);
    padding: 0.3rem 0.55rem;
    pointer-events: none;
}

.pilcrow-top {
    top: 2vh;
}

.pilcrow-bottom {
    bottom: 2vh;
}

/* ============================================================
   FOLIO I - The Binding
   ============================================================ */
.folio-binding {
    grid-template-columns: 1fr 1px 1fr;
    align-items: center;
    min-height: 100vh;
}

.folio-binding .folio-left,
.folio-binding .folio-right {
    padding-top: 0;
    padding-bottom: 0;
    justify-content: center;
}

.binding-word {
    font-family: var(--ff-display);
    font-weight: 700;
    font-size: clamp(2.5rem, 7vw, 5.5rem);
    line-height: 1;
    color: var(--gold);
    letter-spacing: 0.03em;
}

.binding-word-left {
    /* roman, upright */
    font-style: normal;
}

.binding-word-right {
    font-style: italic;
    color: var(--gold);
}

.binding-tld {
    position: absolute;
    top: calc(50% + clamp(2rem, 6vw, 4.5rem));
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--ff-display);
    font-style: italic;
    font-weight: 400;
    font-size: clamp(1rem, 1.6vw, 1.4rem);
    color: var(--burgundy);
    background: var(--bg-recto);
    padding: 0.25rem 0.6rem;
    letter-spacing: 0.08em;
    z-index: 4;
    opacity: 0;
    transition: opacity 500ms ease 400ms;
}

.folio-binding.is-visible .binding-tld {
    opacity: 1;
}

.binding-rule {
    position: absolute;
    bottom: 22vh;
    left: 50%;
    transform: translateX(-50%);
    width: clamp(8rem, 22vw, 18rem);
    height: 1px;
    background: var(--oxblood);
    opacity: 0;
    transition: opacity 700ms ease 600ms;
}

.folio-binding.is-visible .binding-rule {
    opacity: 1;
}

.binding-subtitle {
    position: absolute;
    bottom: 16vh;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--ff-display);
    font-size: clamp(0.7rem, 1.1vw, 0.85rem);
    color: var(--vellum);
    text-transform: uppercase;
    letter-spacing: 0.32em;
    font-variant: small-caps;
    opacity: 0;
    transition: opacity 700ms ease 800ms;
    background: var(--bg-recto);
    padding: 0 0.7rem;
    white-space: nowrap;
}

.folio-binding.is-visible .binding-subtitle {
    opacity: 0.85;
}

/* ============================================================
   FOLIO II - The Lecture Hall (two columns of body prose)
   ============================================================ */
.folio-lecture .folio-side {
    padding-top: 12vh;
    padding-bottom: 12vh;
    max-width: none;
}

.folio-lecture .folio-left {
    align-items: stretch;
    text-align: justify;
}

.folio-lecture .folio-right {
    align-items: stretch;
    text-align: justify;
}

.folio-marker {
    display: inline-block;
    font-family: var(--ff-gloss);
    font-style: italic;
    font-size: 0.85rem;
    color: var(--burgundy);
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.folio-lecture .folio-left .folio-marker {
    align-self: flex-end;
}

.folio-heading {
    font-family: var(--ff-display);
    font-weight: 700;
    color: var(--gold);
    font-size: clamp(1.6rem, 3.5vw, 2.8rem);
    line-height: 1.1;
    letter-spacing: 0.03em;
    margin-bottom: 1.6rem;
}

.folio-lecture .folio-left .folio-heading {
    font-style: normal;
}

.folio-lecture .folio-right .folio-heading {
    font-style: italic;
}

.folio-prose {
    font-family: var(--ff-body);
    font-size: clamp(1rem, 1.4vw, 1.2rem);
    line-height: 1.65;
    letter-spacing: 0.01em;
    color: var(--vellum);
    margin-bottom: 1.2rem;
    max-width: 38ch;
}

.folio-lecture .folio-left .folio-prose {
    font-style: normal;
    margin-left: auto;
}

.folio-lecture .folio-right .folio-prose {
    font-style: italic;
    margin-right: auto;
}

/* drop-cap-ish first letter on opening prose */
.folio-lecture .folio-side .folio-prose:first-of-type::first-letter {
    font-family: var(--ff-display);
    font-size: 2.4em;
    line-height: 0.9;
    float: left;
    margin: 0.05em 0.1em 0 0;
    color: var(--burgundy);
    font-weight: 700;
}

.folio-lecture .folio-right .folio-side .folio-prose:first-of-type::first-letter {
    float: right;
    margin: 0.05em 0 0 0.1em;
}

/* ============================================================
   FOLIO III - The Evidence Room
   ============================================================ */
.folio-evidence {
    grid-template-columns: 1fr 1px 1fr;
    grid-template-rows: 1fr auto;
    align-items: stretch;
    padding: 8vh 0;
}

.evidence-band {
    grid-column: 1 / -1;
    grid-row: 1;
    display: grid;
    grid-template-columns: 1fr 1px 1fr;
    width: 100%;
    align-items: center;
    padding: 4vh 0;
}

.evidence-pane {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    padding: 0 clamp(1.5rem, 4vw, 4rem);
    opacity: 0;
    transition: opacity 700ms ease 200ms;
}

.evidence-left {
    grid-column: 1;
    justify-content: flex-end;
}

.evidence-right {
    grid-column: 3;
    justify-content: flex-start;
}

.folio-evidence.is-visible .evidence-pane {
    opacity: 1;
}

.plate {
    position: relative;
    width: clamp(120px, 18vw, 220px);
    aspect-ratio: 4 / 5;
    background: var(--bg-recto);
    overflow: hidden;
    box-shadow:
        0 0 0 1px var(--oxblood),
        0 1.2rem 2rem rgba(0, 0, 0, 0.65);
    filter: grayscale(1) contrast(1.05) brightness(0.85);
}

.plate-mirrored {
    transform: scaleX(-1);
}

.plate-figure {
    position: absolute;
    inset: 0;
}

.plate-figure-1 {
    background:
        radial-gradient(ellipse at 50% 35%, rgba(212, 201, 184, 0.55) 0%, rgba(212, 201, 184, 0.18) 18%, transparent 38%),
        radial-gradient(ellipse at 30% 80%, rgba(168, 146, 58, 0.18) 0%, transparent 50%),
        linear-gradient(180deg,
            #1d161a 0%,
            #2a1f24 18%,
            #15101a 38%,
            #0e0a10 60%,
            #050306 100%);
}

.plate-figure-2 {
    background:
        radial-gradient(ellipse at 65% 25%, rgba(212, 201, 184, 0.42) 0%, rgba(168, 146, 58, 0.12) 25%, transparent 45%),
        radial-gradient(ellipse at 25% 60%, rgba(107, 16, 32, 0.4) 0%, transparent 55%),
        linear-gradient(160deg,
            #221920 0%,
            #160e14 35%,
            #0c080c 70%,
            #060306 100%);
}

.plate-grain {
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 2px),
        repeating-linear-gradient(90deg, rgba(0, 0, 0, 0.04) 0 1px, transparent 1px 3px);
    mix-blend-mode: overlay;
    pointer-events: none;
}

.plate::after {
    /* burgundy multiply overlay - the duotone burgundy wash */
    content: "";
    position: absolute;
    inset: 0;
    background: var(--burgundy);
    opacity: 0.15;
    mix-blend-mode: multiply;
    pointer-events: none;
}

.plate-vignette {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center,
        transparent 0%,
        transparent 55%,
        var(--bg-recto) 100%);
    pointer-events: none;
}

.plate-caption {
    position: absolute;
    bottom: -1.5rem;
    left: 0;
    right: 0;
    text-align: center;
    font-family: var(--ff-gloss);
    font-style: italic;
    font-size: 0.7rem;
    color: var(--vellum);
    opacity: 0.6;
    letter-spacing: 0.04em;
    transform: scaleX(1);
}

/* counter the mirror scaling on caption text */
.plate-mirrored .plate-caption {
    transform: scaleX(-1);
}

.evidence-footnotes {
    grid-column: 1 / -1;
    grid-row: 2;
    display: grid;
    grid-template-columns: 1fr 1px 1fr;
    margin-top: 4vh;
    padding-top: 2vh;
}

.footnote {
    font-family: var(--ff-gloss);
    font-style: italic;
    font-size: clamp(0.78rem, 1.2vw, 0.92rem);
    line-height: 1.55;
    color: var(--vellum);
    opacity: 0.78;
    padding: 0 clamp(1.5rem, 5vw, 5rem);
    max-width: 44ch;
    letter-spacing: 0.015em;
}

.footnote-left {
    grid-column: 1;
    text-align: right;
    margin-left: auto;
    border-top: 1px solid var(--oxblood);
    padding-top: 1rem;
}

.footnote-right {
    grid-column: 3;
    text-align: left;
    margin-right: auto;
    border-top: 1px solid var(--oxblood);
    padding-top: 1rem;
}

.footnote-mark {
    color: var(--burgundy);
    font-family: var(--ff-display);
    font-style: italic;
    margin-right: 0.3rem;
    font-weight: 700;
}

/* ============================================================
   FOLIO IV - The Verdict
   ============================================================ */
.folio-verdict {
    grid-template-rows: 1fr auto;
    align-items: center;
    justify-items: center;
}

.verdict-numeral-wrap {
    grid-column: 1 / -1;
    grid-row: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 6vh 0 2vh;
    opacity: 0;
    transition: opacity 1000ms cubic-bezier(0.16, 1, 0.3, 1) 200ms;
}

.folio-verdict.is-visible .verdict-numeral-wrap {
    opacity: 1;
}

.verdict-numeral {
    font-family: var(--ff-display);
    font-weight: 700;
    font-style: italic;
    font-size: clamp(15rem, 30vw, 40rem);
    line-height: 0.85;
    color: var(--burgundy);
    letter-spacing: -0.02em;
    text-shadow:
        -0.06em 0 0 rgba(168, 146, 58, 0.55),
        0.06em 0 0 rgba(139, 143, 160, 0.5);
    user-select: none;
}

.verdict-prose {
    grid-column: 1 / -1;
    grid-row: 2;
    font-family: var(--ff-body);
    font-style: italic;
    font-size: clamp(1rem, 1.6vw, 1.3rem);
    line-height: 1.7;
    color: var(--vellum);
    text-align: center;
    max-width: 48ch;
    margin: 0 auto 6vh;
    padding: 0 clamp(1.5rem, 4vw, 4rem);
    opacity: 0;
    transition: opacity 800ms ease 600ms;
    letter-spacing: 0.02em;
}

.folio-verdict.is-visible .verdict-prose {
    opacity: 0.92;
}

/* ============================================================
   FOLIO V - The Colophon
   ============================================================ */
.folio-colophon {
    grid-template-columns: 1fr 1px 1fr;
    align-items: center;
    justify-items: center;
    background: var(--bg-void);
}

.colophon-block {
    grid-column: 1 / -1;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 100%;
    padding: 10vh 0;
    gap: 1rem;
    opacity: 0;
    transition: opacity 900ms ease 200ms;
}

.folio-colophon.is-visible .colophon-block {
    opacity: 1;
}

.colophon-line {
    font-family: var(--ff-gloss);
    font-style: italic;
    font-size: clamp(0.78rem, 1.2vw, 0.92rem);
    color: var(--vellum);
    text-transform: lowercase;
    font-variant: small-caps;
    letter-spacing: 0.18em;
    line-height: 1.7;
    background: var(--bg-void);
    padding: 0 1rem;
    max-width: 42ch;
}

.colophon-domain-line {
    font-family: var(--ff-display);
    font-weight: 700;
    font-style: normal;
    font-size: clamp(1rem, 2vw, 1.6rem);
    color: var(--gold);
    text-transform: none;
    font-variant: normal;
    letter-spacing: 0.08em;
    margin-bottom: 0.4rem;
}

.colophon-line-faint {
    opacity: 0.55;
}

/* The wax seal */
.wax-seal {
    width: clamp(3rem, 5vw, 5rem);
    height: clamp(3rem, 5vw, 5rem);
    border-radius: 50%;
    margin: 1.6rem 0;
    background: radial-gradient(
        circle at 35% 30%,
        var(--burgundy-light) 0%,
        var(--burgundy) 45%,
        var(--oxblood) 100%
    );
    box-shadow:
        inset 0 0 0 1px rgba(212, 201, 184, 0.18),
        inset 0 -0.4rem 0.8rem rgba(0, 0, 0, 0.55),
        inset 0 0.2rem 0.4rem rgba(212, 201, 184, 0.08),
        0 0.5rem 1.2rem rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transform: scale(0.6) rotate(-8deg);
    opacity: 0;
    transition: transform 1000ms cubic-bezier(0.16, 1, 0.3, 1) 700ms,
                opacity 1000ms ease 700ms;
}

.folio-colophon.is-visible .wax-seal {
    transform: scale(1) rotate(-8deg);
    opacity: 1;
}

.wax-amp {
    font-family: var(--ff-display);
    font-style: italic;
    font-size: 2rem;
    color: var(--vellum);
    line-height: 1;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.5);
    user-select: none;
}

/* ============================================================
   Responsive: collapse to single column under 768px
   ============================================================ */
@media (max-width: 768px) {
    body {
        background: var(--bg-recto);
    }

    .spine {
        display: none;
    }

    .quire {
        top: auto;
        bottom: 1.5rem;
        left: 50%;
        transform: translateX(-50%);
        flex-direction: row;
        gap: 1.2rem;
    }

    .quire-label {
        display: none;
    }

    .folio {
        grid-template-columns: 1fr;
        padding: 6vh 0;
    }

    .folio-side {
        padding: 1.5rem clamp(1rem, 5vw, 2rem);
        align-items: flex-start;
        text-align: left;
        transform: translateX(0) !important;
    }

    .folio-left {
        grid-column: 1;
    }

    .folio-right {
        grid-column: 1;
    }

    .folio:nth-child(odd) {
        background: var(--bg-recto);
    }

    .folio:nth-child(even) {
        background: var(--bg-verso);
    }

    .gloss {
        position: relative;
        top: auto;
        left: auto;
        right: auto;
        max-width: none;
        border: none !important;
        padding: 0 1rem;
        margin-bottom: 1rem;
        text-align: left;
        opacity: 0.6;
    }

    .folio-binding {
        text-align: center;
    }

    .folio-binding .folio-side {
        align-items: center;
        text-align: center;
        padding: 1rem;
    }

    .binding-tld {
        position: relative;
        top: auto;
        left: auto;
        transform: none;
        margin: 1rem auto;
        display: inline-block;
    }

    .binding-rule {
        position: relative;
        bottom: auto;
        left: auto;
        transform: none;
        margin: 2rem auto 1rem;
    }

    .binding-subtitle {
        position: relative;
        bottom: auto;
        left: auto;
        transform: none;
        margin: 0 auto 2rem;
    }

    .evidence-band {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .evidence-pane {
        grid-column: 1 !important;
        justify-content: center;
        flex-wrap: wrap;
    }

    .evidence-footnotes {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .footnote-left,
    .footnote-right {
        grid-column: 1;
        text-align: left;
        margin: 0;
    }

    .verdict-numeral {
        font-size: clamp(8rem, 40vw, 14rem);
    }
}