/* ============================================================
   transactology.net - Light-Academia Scholarly Treatise
   ============================================================ */

/* CSS Custom Properties */
:root {
    --color-vellum: #F5EDE0;
    --color-text: #3A2018;
    --color-burgundy: #6B1C2A;
    --color-gold: #8B6914;
    --color-annotation: #6B4423;
    --color-foxing: #D4C5A9;
    --color-mauve: #8C6E7F;
    --color-shadow: #2A1A10;
    --color-taupe: #8B7355;

    --font-display: 'Cormorant Garamond', 'Georgia', serif;
    --font-body: 'Source Serif 4', 'Georgia', serif;
    --font-annotation: 'Caveat', cursive;
    --font-catalog: 'IBM Plex Mono', 'Courier New', monospace;

    --ease-scholarly: cubic-bezier(0.25, 0.1, 0.25, 1.0);
    --scroll-progress: 0;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background-color: var(--color-vellum);
    color: var(--color-text);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.1vw, 1.25rem);
    line-height: 1.75;
    overflow-x: hidden;
}

.svg-filters {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* ============================================================
   Scroll Progress Bookmark
   ============================================================ */
.scroll-bookmark {
    position: fixed;
    left: 1.5rem;
    top: 10vh;
    width: 2px;
    height: 80vh;
    background-color: rgba(139, 105, 20, 0.15);
    z-index: 100;
}

.scroll-bookmark-fill {
    width: 100%;
    height: 100%;
    background-color: var(--color-gold);
    transform: scaleY(var(--scroll-progress));
    transform-origin: top;
    transition: transform 0.1s linear;
}

/* ============================================================
   Vellum Surface (Paper Grain Noise)
   ============================================================ */
.vellum-surface {
    background-color: var(--color-vellum);
    position: relative;
}

.vellum-surface::after {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.1;
    pointer-events: none;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
    background-size: 300px 300px;
}

/* Different noise for different folios */
.folio-thesis.vellum-surface::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.55' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

.folio-marginalia.vellum-surface::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

.folio-codex.vellum-surface::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* ============================================================
   Decorative Border Pattern
   ============================================================ */
.folio::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    border: 1px solid transparent;
    border-image: repeating-linear-gradient(
        45deg,
        rgba(140, 110, 127, 0.08) 0px,
        rgba(140, 110, 127, 0.08) 2px,
        transparent 2px,
        transparent 10px
    ) 1;
}

/* ============================================================
   Folio Sections
   ============================================================ */
.folio {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(3rem, 8vh, 6rem) clamp(1.5rem, 5vw, 4rem);
    position: relative;
}

.folio-content {
    max-width: 680px;
    width: 100%;
    position: relative;
    z-index: 1;
}

/* ============================================================
   Section Ornaments (Cultural Symbols)
   ============================================================ */
.section-ornament {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 0;
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 0.6s var(--ease-scholarly), transform 0.6s var(--ease-scholarly);
}

.section-ornament.revealed {
    opacity: 1;
    transform: scale(1);
}

.cultural-symbol {
    width: 60px;
    height: 60px;
}

.section-ornament .cultural-symbol {
    width: 50px;
    height: 50px;
}

/* ============================================================
   Typography
   ============================================================ */
.folio-heading {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2rem, 5vw, 4rem);
    letter-spacing: 0.04em;
    line-height: 1.15;
    color: var(--color-text);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-scholarly), transform 0.8s var(--ease-scholarly);
}

.folio-heading.revealed {
    opacity: 1;
    transform: translateY(0);
}

.annotation-text {
    font-family: var(--font-annotation);
    font-weight: 400;
    font-size: clamp(0.875rem, 1.2vw, 1.1rem);
    color: var(--color-annotation);
}

.catalog-text {
    font-family: var(--font-catalog);
    font-weight: 400;
    font-size: 0.8rem;
    color: var(--color-taupe);
}

/* ============================================================
   Folio I: Preface (Colophon Entry)
   ============================================================ */
.folio-preface {
    min-height: 100vh;
    flex-direction: column;
    text-align: center;
}

.folio-preface .folio-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.ornament-entry {
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 0.6s var(--ease-scholarly), transform 0.6s var(--ease-scholarly);
}

.ornament-entry.revealed {
    opacity: 1;
    transform: scale(1);
}

.colophon-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    letter-spacing: 0.12em;
    color: var(--color-text);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s var(--ease-scholarly), transform 1s var(--ease-scholarly);
}

.colophon-title.revealed {
    opacity: 1;
    transform: translateY(0);
}

.colophon-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s var(--ease-scholarly), transform 0.8s var(--ease-scholarly);
}

.colophon-subtitle.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   Folio II: Thesis (Two-Column Academic Layout)
   ============================================================ */
.two-column-text {
    column-count: 2;
    column-gap: 2.5rem;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-scholarly), transform 0.8s var(--ease-scholarly);
}

.two-column-text.revealed {
    opacity: 1;
    transform: translateY(0);
}

.two-column-text p {
    margin-bottom: 1.5em;
    text-indent: 1.5em;
    text-align: justify;
    hyphens: auto;
}

.two-column-text p:first-child {
    text-indent: 0;
}

.two-column-text p:first-child::first-letter {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 3.5em;
    float: left;
    line-height: 0.8;
    margin-right: 0.08em;
    margin-top: 0.05em;
    color: var(--color-burgundy);
}

/* Ledger Lines */
.ledger-lines {
    background-image: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent calc(1.75em * 1rem / 1rem - 1px),
        rgba(212, 197, 169, 0.3) calc(1.75em * 1rem / 1rem),
        transparent calc(1.75em * 1rem / 1rem + 1px)
    );
    background-size: 100% 1.75em;
    background-position: 0 0.35em;
}

@media (max-width: 768px) {
    .two-column-text {
        column-count: 1;
    }
}

/* ============================================================
   Folio III: Marginalia
   ============================================================ */
.marginalia-shifted {
    margin-left: -8%;
    max-width: 720px;
}

.marginalia-body {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-scholarly), transform 0.8s var(--ease-scholarly);
}

.marginalia-body.revealed {
    opacity: 1;
    transform: translateY(0);
}

.marginalia-note {
    padding: 1.25rem 1.5rem;
    border-left: 2px solid var(--color-foxing);
    background-color: rgba(245, 237, 224, 0.5);
    font-size: clamp(1rem, 1.4vw, 1.2rem);
    line-height: 1.6;
    position: relative;
}

.manicule {
    font-size: 1.3em;
    margin-right: 0.4em;
    color: var(--color-annotation);
    display: inline-block;
}

.marginalia-fragment {
    padding: 0.75rem 1.5rem;
    text-align: right;
}

.marginalia-fragment .catalog-text {
    font-style: italic;
    letter-spacing: 0.02em;
}

@media (max-width: 768px) {
    .marginalia-shifted {
        margin-left: 0;
        max-width: 100%;
    }
}

/* ============================================================
   Folio IV: Codex (Horizontal Timeline)
   ============================================================ */
.folio-codex {
    align-items: flex-start;
    padding-top: clamp(4rem, 10vh, 8rem);
}

.folio-codex .folio-content {
    max-width: 100%;
}

.timeline-strip {
    display: flex;
    gap: 2rem;
    overflow-x: auto;
    padding: 2rem 1rem 3rem;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--color-foxing) transparent;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-scholarly), transform 0.8s var(--ease-scholarly);
}

.timeline-strip.revealed {
    opacity: 1;
    transform: translateY(0);
}

.timeline-strip::-webkit-scrollbar {
    height: 6px;
}

.timeline-strip::-webkit-scrollbar-track {
    background: transparent;
}

.timeline-strip::-webkit-scrollbar-thumb {
    background-color: var(--color-foxing);
    border-radius: 3px;
}

.timeline-card {
    flex: 0 0 260px;
    scroll-snap-align: start;
    background-color: var(--color-vellum);
    border: 1px solid var(--color-foxing);
    padding: 1.5rem;
    position: relative;
    transition: box-shadow 0.3s var(--ease-scholarly);
}

.timeline-card::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    height: 3px;
    background-color: var(--color-gold);
}

.timeline-card:hover {
    box-shadow: 0 4px 20px rgba(42, 26, 16, 0.1);
}

.timeline-illustration {
    width: 100%;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.timeline-illustration svg {
    width: 100px;
    height: 100px;
}

.timeline-era {
    font-size: clamp(0.85rem, 1vw, 1rem);
    margin-bottom: 0.3rem;
}

.timeline-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.1rem, 1.5vw, 1.4rem);
    letter-spacing: 0.03em;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.timeline-description {
    font-family: var(--font-body);
    font-size: clamp(0.85rem, 0.9vw, 0.95rem);
    line-height: 1.6;
    color: var(--color-annotation);
}

/* ============================================================
   Folio V: Colophon (Catalog Card)
   ============================================================ */
.folio-colophon {
    min-height: 80vh;
}

.catalog-card {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-scholarly), transform 0.8s var(--ease-scholarly);
}

.catalog-card.revealed {
    opacity: 1;
    transform: translateY(0);
}

.catalog-border {
    border: 1px solid var(--color-foxing);
    padding: clamp(2rem, 4vw, 3rem);
    position: relative;
}

.catalog-border::before {
    content: '';
    position: absolute;
    inset: 4px;
    border: 1px solid rgba(212, 197, 169, 0.5);
    pointer-events: none;
}

.catalog-heading {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    margin-bottom: 2rem;
    text-align: center;
}

.catalog-entries {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.catalog-entry {
    display: flex;
    gap: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px dotted var(--color-foxing);
    align-items: baseline;
}

.catalog-label {
    font-family: var(--font-catalog);
    font-weight: 400;
    font-size: 0.75rem;
    color: var(--color-taupe);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    flex: 0 0 100px;
}

.catalog-value {
    font-family: var(--font-body);
    font-size: clamp(0.9rem, 1vw, 1rem);
    line-height: 1.5;
    color: var(--color-text);
}

.catalog-value.annotation-text {
    font-style: italic;
}

/* Wax Seal */
.wax-seal {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 0.8s var(--ease-scholarly), transform 0.8s var(--ease-scholarly);
}

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

.wax-seal svg {
    width: 80px;
    height: 80px;
    filter: drop-shadow(2px 3px 6px rgba(42, 26, 16, 0.3));
}

/* ============================================================
   Progressive Disclosure States
   ============================================================ */
.folio-content > *,
.folio-content .ornament-entry,
.folio-content .colophon-title,
.folio-content .colophon-subtitle {
    /* Initial hidden state handled by individual element classes */
}

/* ============================================================
   Selection & Scrollbar
   ============================================================ */
::selection {
    background-color: rgba(107, 28, 42, 0.2);
    color: var(--color-text);
}

html {
    scrollbar-width: thin;
    scrollbar-color: var(--color-foxing) var(--color-vellum);
}

body::-webkit-scrollbar {
    width: 8px;
}

body::-webkit-scrollbar-track {
    background: var(--color-vellum);
}

body::-webkit-scrollbar-thumb {
    background-color: var(--color-foxing);
    border-radius: 4px;
}

/* ============================================================
   Responsive Adjustments
   ============================================================ */
@media (max-width: 600px) {
    .scroll-bookmark {
        left: 0.75rem;
    }

    .folio {
        padding: clamp(2rem, 5vh, 4rem) clamp(1rem, 3vw, 2rem);
    }

    .catalog-entry {
        flex-direction: column;
        gap: 0.25rem;
    }

    .catalog-label {
        flex: none;
    }

    .timeline-card {
        flex: 0 0 220px;
    }
}