/* ============================================
   TRANSACTOLOGY.ORG - Illuminated Codex
   ============================================ */

/* === CSS Variables === */
:root {
    --deep-bg: #1a150f;
    --surface: #2c2318;
    --text-gold: #e8dcc8;
    --accent-gold: #c4a97d;
    --burgundy: #6b2737;
    --verdigris: #4a7c6f;
    --highlight: #d4a847;
    --shadow: #0f0c08;
    --spine-color: #8b6f47;
}

/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-snap-type: y proximity;
    scroll-behavior: smooth;
    background: var(--deep-bg);
}

body {
    font-family: 'Source Serif 4', serif;
    color: var(--text-gold);
    background: var(--deep-bg);
    overflow-x: hidden;
    line-height: 1.75;
}

/* === Ledger Grid Background === */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    background:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent calc(3rem - 0.25px),
            rgba(196, 169, 125, 0.06) calc(3rem - 0.25px),
            rgba(196, 169, 125, 0.06) 3rem
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent calc(3rem - 0.25px),
            rgba(196, 169, 125, 0.03) calc(3rem - 0.25px),
            rgba(196, 169, 125, 0.03) 3rem
        );
    opacity: var(--grid-opacity, 1);
    transition: opacity 2s ease;
}

/* === Spine Line === */
#spine-line {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100vh;
    z-index: 10;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1s ease;
}

#spine-line.visible {
    opacity: 1;
}

#spine-path {
    stroke-dasharray: 100;
    stroke-dashoffset: 100;
    transition: stroke-dashoffset 2s ease;
    vector-effect: non-scaling-stroke;
}

#spine-line.drawn #spine-path {
    stroke-dashoffset: 0;
}

/* === Index Ribbon === */
#index-ribbon {
    position: fixed;
    top: 0;
    right: 0;
    width: 8px;
    height: 100vh;
    background: var(--burgundy);
    z-index: 100;
}

#ribbon-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: var(--highlight);
    transition: height 0.15s ease;
}

.ribbon-notch {
    position: absolute;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent-gold);
    opacity: 0.6;
}

.ribbon-notch[data-section="0"] { top: 0%; }
.ribbon-notch[data-section="1"] { top: 20%; }
.ribbon-notch[data-section="2"] { top: 40%; }
.ribbon-notch[data-section="3"] { top: 65%; }
.ribbon-notch[data-section="4"] { top: 85%; }

/* === Folio Sections === */
.folio {
    position: relative;
    min-height: 100vh;
    scroll-snap-align: start;
    padding: 5vh 5vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.folio-tall {
    min-height: 150vh;
    justify-content: flex-start;
    padding-top: 10vh;
}

.folio-border {
    position: absolute;
    top: 5%;
    left: 5%;
    right: 5%;
    bottom: 5%;
    border: 0.5px solid rgba(196, 169, 125, 0.12);
    pointer-events: none;
    z-index: 2;
}

/* === Typography === */
.display-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-gold);
    text-align: center;
}

.display-title .letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.display-title .letter.visible {
    opacity: 1;
    transform: translateY(0);
}

.subtitle-mono {
    font-family: 'IBM Plex Mono', monospace;
    font-size: clamp(0.75rem, 0.9vw, 0.9rem);
    font-weight: 400;
    color: var(--accent-gold);
    text-align: center;
    margin-top: 2rem;
    min-height: 1.5em;
}

.chapter-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-gold);
    margin-bottom: 0.5rem;
}

.section-heading {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    font-weight: 600;
    color: var(--text-gold);
    margin-bottom: 2rem;
    line-height: 1.3;
}

.body-text {
    font-family: 'Source Serif 4', serif;
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    font-weight: 400;
    line-height: 1.75;
    color: var(--text-gold);
    margin-bottom: 1.5rem;
}

/* === Gold Shimmer Effect === */
.gold-shimmer {
    background: linear-gradient(
        90deg,
        var(--text-gold) 0%,
        var(--highlight) 25%,
        #f0d060 50%,
        var(--highlight) 75%,
        var(--text-gold) 100%
    );
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
    0% { background-position: 100% 0; }
    50% { background-position: -100% 0; }
    100% { background-position: 100% 0; }
}

/* === Frontispiece === */
#frontispiece {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--deep-bg);
}

.frontispiece-content {
    text-align: center;
    z-index: 5;
    position: relative;
}

/* === Folio Columns === */
.folio-columns {
    display: grid;
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    z-index: 5;
    position: relative;
}

.col-60-40 {
    grid-template-columns: 60% 1fr;
}

.folio-main {
    padding-right: 2rem;
}

.folio-margin {
    padding-left: 2rem;
    border-left: 0.5px solid rgba(196, 169, 125, 0.2);
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding-top: 4rem;
}

/* === Marginalia === */
.marginalia {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.marginalia.revealed {
    opacity: 1;
    transform: translateX(0);
}

.margin-note {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: 0.85rem;
    font-weight: 300;
    color: var(--accent-gold);
    line-height: 1.6;
    display: block;
}

/* === Timeline === */
.timeline {
    position: relative;
    max-width: 1100px;
    margin: 3rem auto 0;
    width: 100%;
    z-index: 5;
}

.timeline-event {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 48px 1fr;
    align-items: start;
    margin-bottom: 4rem;
    min-height: 120px;
}

.timeline-event.event-left .event-content {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
    padding-right: 2rem;
}

.timeline-event.event-left .event-seal {
    grid-column: 2;
    grid-row: 1;
}

.timeline-event.event-right .event-content {
    grid-column: 3;
    grid-row: 1;
    text-align: left;
    padding-left: 2rem;
}

.timeline-event.event-right .event-seal {
    grid-column: 2;
    grid-row: 1;
}

/* === Wax Seal === */
.event-seal {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--burgundy), #4a1520);
    border: 1px solid var(--accent-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    justify-self: center;
    position: relative;
    z-index: 5;
}

.event-seal.scaled {
    transform: scale(1);
}

.event-seal::after {
    content: attr(data-initial);
    font-family: 'Cormorant Garamond', serif;
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-gold);
}

.event-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--highlight);
    margin-bottom: 0.5rem;
}

.event-content::before {
    content: attr(data-year);
    display: block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-gold);
    margin-bottom: 0.25rem;
    opacity: 0.7;
}

.timeline-event .event-content {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease 0.3s, transform 0.8s ease 0.3s;
}

.timeline-event.in-view .event-content {
    opacity: 1;
    transform: translateY(0);
}

/* Year label from data attribute */
.timeline-event.event-left .event-content::before {
    content: attr(data-year);
}

.timeline-event.event-right .event-content::before {
    content: attr(data-year);
}

/* Propagate data-year from parent */
.timeline-event .event-content {
    position: relative;
}

/* === Ledger Entry (Folio III) === */
.ledger-entry {
    max-width: 900px;
    margin: 3rem auto 0;
    width: 100%;
    z-index: 5;
    position: relative;
}

.ledger-row {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 0.5px solid rgba(196, 169, 125, 0.15);
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    position: relative;
}

.ledger-row.highlighted {
    opacity: 1;
    transform: translateY(0);
}

.ledger-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: clamp(0.75rem, 0.9vw, 0.9rem);
    font-weight: 400;
    color: var(--accent-gold);
    letter-spacing: 0.1em;
    padding-top: 0.25rem;
}

.ledger-code {
    font-family: 'IBM Plex Mono', monospace;
    font-size: clamp(0.75rem, 0.9vw, 0.9rem);
    color: var(--highlight);
    display: block;
    margin-bottom: 0.75rem;
}

.ledger-note {
    font-family: 'Source Serif 4', serif;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-gold);
}

.leader-line {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    pointer-events: none;
    opacity: 0.2;
    display: none;
}

/* === Colophon === */
#colophon {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--deep-bg);
    text-align: center;
}

.colophon-content {
    z-index: 5;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.wax-seal-large {
    width: 120px;
    height: 120px;
    opacity: 0;
    transform: scale(0.5);
    transition: opacity 1s ease, transform 1s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.wax-seal-large.revealed {
    opacity: 1;
    transform: scale(1);
}

.finis-text {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent-gold);
}

.colophon-note {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: 1rem;
    font-weight: 300;
    color: var(--text-gold);
    opacity: 0.7;
    line-height: 1.8;
    max-width: 400px;
}

.colophon-domain {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-gold);
    opacity: 0.5;
    margin-top: 1rem;
}

/* === Responsive === */
@media (max-width: 768px) {
    .col-60-40 {
        grid-template-columns: 1fr;
    }

    .folio-margin {
        border-left: none;
        border-top: 0.5px solid rgba(196, 169, 125, 0.2);
        padding-left: 0;
        padding-top: 2rem;
    }

    .folio-main {
        padding-right: 0;
    }

    .timeline-event {
        grid-template-columns: 48px 1fr;
    }

    .timeline-event.event-left .event-content,
    .timeline-event.event-right .event-content {
        grid-column: 2;
        text-align: left;
        padding-left: 1.5rem;
        padding-right: 0;
    }

    .timeline-event.event-left .event-seal,
    .timeline-event.event-right .event-seal {
        grid-column: 1;
    }

    .ledger-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    #spine-line {
        left: 24px;
        transform: none;
    }

    .folio {
        padding: 5vh 8vw 5vh 5vw;
    }
}

/* === Verdigris Patina Accent === */
.folio-border::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: linear-gradient(
        135deg,
        rgba(74, 124, 111, 0.08) 0%,
        transparent 30%,
        transparent 70%,
        rgba(74, 124, 111, 0.05) 100%
    );
    pointer-events: none;
}