/* =====================================================================
   sbom.wiki  -- Dark-Academia Encyclopaedic Stylesheet
   Palette: #1C1510 #2A2018 #3D2E1F #E8DCC8 #C9A96E #8B7355 #E6A23C #9B4D3A
   Type: Libre Baskerville (body), Playfair Display (heads), Source Sans 3 (margin),
         JetBrains Mono (technical terms)
   ===================================================================== */

:root {
    --bg-primary: #1C1510;
    --bg-secondary: #2A2018;
    --bg-paper: #3D2E1F;
    --ink-primary: #E8DCC8;
    --gold: #C9A96E;
    --copper: #8B7355;
    --amber: #E6A23C;
    --burgundy: #9B4D3A;
    --black: #0a0a0a;

    --serif-body: "Libre Baskerville", "Lora", Georgia, serif;
    --serif-display: "Playfair Display", "Libre Baskerville", Georgia, serif;
    --sans-margin: "Source Sans 3", "Inter", system-ui, sans-serif;
    --mono-term: "JetBrains Mono", "Space Mono", Consolas, monospace;
}

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

html {
    background: var(--bg-primary);
    scroll-behavior: smooth;
}

body {
    font-family: var(--serif-body);
    font-size: 17px;
    line-height: 1.85;
    color: var(--ink-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

::selection {
    background: var(--gold);
    color: var(--bg-primary);
}

/* ----- Paper texture overlay (SVG noise) ----- */
.paper-texture {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 1;
    opacity: 0.06;
    mix-blend-mode: multiply;
}

/* ----- Reading-lamp vignette ----- */
.vignette {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    background: radial-gradient(ellipse at center, transparent 60%, rgba(0, 0, 0, 0.4) 100%);
    animation: lamp-breathe 8s ease-in-out infinite;
}

@keyframes lamp-breathe {
    0%, 100% { background: radial-gradient(ellipse 62% 62% at center, transparent 0%, rgba(0,0,0,0.42) 100%); }
    50%      { background: radial-gradient(ellipse 58% 58% at center, transparent 0%, rgba(0,0,0,0.46) 100%); }
}

/* ----- Ornamental viewport border ----- */
.viewport-border {
    position: fixed;
    inset: 18px;
    pointer-events: none;
    z-index: 3;
    opacity: 0;
    transition: opacity 1200ms ease;
}

.viewport-border.visible {
    opacity: 0.32;
}

.border-line {
    position: absolute;
    background: var(--gold);
}

.border-top, .border-bottom {
    left: 16px;
    right: 16px;
    height: 1px;
}
.border-top    { top: 0; }
.border-bottom { bottom: 0; }

.border-left, .border-right {
    top: 16px;
    bottom: 16px;
    width: 1px;
}
.border-left  { left: 0; }
.border-right { right: 0; }

.corner {
    position: absolute;
    width: 18px;
    height: 18px;
    border: 1px solid var(--gold);
    background: transparent;
}
.corner-tl { top: -2px; left: -2px;  border-right: none;  border-bottom: none; }
.corner-tr { top: -2px; right: -2px; border-left: none;   border-bottom: none; }
.corner-bl { bottom: -2px; left: -2px;  border-right: none; border-top: none; }
.corner-br { bottom: -2px; right: -2px; border-left: none;  border-top: none; }

/* ===================================================================
   Hero / Title page
   =================================================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 48px;
    z-index: 5;
}

.hero-inner {
    max-width: 720px;
    text-align: center;
    margin-top: -20px; /* slightly above optical center */
}

.hero-eyebrow {
    font-family: var(--sans-margin);
    font-size: 12px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--copper);
    margin-bottom: 36px;
    opacity: 0;
    animation: fade-up 900ms ease 200ms forwards;
}

.hero-rule {
    width: 300px;
    margin: 0 auto 28px;
    overflow: visible;
    opacity: 0;
    animation: fade-in 600ms ease 1300ms forwards;
}

.hero-rule svg {
    width: 0;
    height: 14px;
    animation: rule-grow 600ms ease 1300ms forwards;
    overflow: visible;
}

@keyframes rule-grow {
    to { width: 300px; }
}

.hero-title {
    font-family: var(--serif-display);
    font-weight: 700;
    font-size: clamp(40px, 7vw, 76px);
    line-height: 1.1;
    letter-spacing: 0.06em;
    color: var(--ink-primary);
    margin: 12px 0 32px;
    user-select: none;
}

.hero-title .ch {
    display: inline-block;
    opacity: 0;
    transform: translateY(-8px);
    animation: char-in 600ms cubic-bezier(0.34, 1.2, 0.64, 1) forwards;
}

.hero-title .ch.sep {
    color: var(--gold);
    margin: 0 0.04em;
}

@keyframes char-in {
    to { opacity: 1; transform: translateY(0); }
}

.hero-subtitle {
    font-family: var(--serif-display);
    font-size: 18px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.04em;
    margin-bottom: 36px;
    opacity: 0;
    animation: fade-up 800ms ease 1900ms forwards;
}

.hero-subtitle em {
    font-style: italic;
    color: var(--ink-primary);
}

.hero-divider {
    width: 80%;
    max-width: 560px;
    height: 2px;
    background: var(--copper);
    margin: 0 auto 36px;
    opacity: 0;
    animation: fade-in 800ms ease 1900ms forwards;
}

.hero-epigraph {
    font-style: italic;
    font-size: 16px;
    line-height: 1.8;
    color: var(--ink-primary);
    max-width: 540px;
    margin: 0 auto;
    opacity: 0;
    animation: fade-up 800ms ease 2100ms forwards;
}

.epigraph-attribution {
    display: block;
    margin-top: 14px;
    font-style: normal;
    font-family: var(--sans-margin);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--copper);
}

.hero-scroll-cue {
    margin-top: 64px;
    font-family: var(--sans-margin);
    font-size: 11px;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--copper);
    opacity: 0;
    animation: fade-in 1000ms ease 2600ms forwards, gentle-pulse 3.4s ease-in-out 2600ms infinite;
}

.cue-mark {
    display: block;
    margin-top: 10px;
    font-size: 22px;
    color: var(--gold);
    letter-spacing: 0;
}

@keyframes gentle-pulse {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(6px); }
}

@keyframes fade-in { to { opacity: 1; } }
@keyframes fade-up {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===================================================================
   Codex layout: persistent margin + content river
   =================================================================== */

.codex {
    position: relative;
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 0;
    padding: 0 48px 160px 48px;
    z-index: 5;
}

/* ----- Margin column ----- */
.margin-column {
    position: relative;
    padding: 60px 24px 60px 0;
    border-right: 1px solid rgba(139, 115, 85, 0.18);
}

.margin-anchor {
    margin-bottom: 220px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 700ms ease, transform 700ms ease;
}

.margin-anchor.visible {
    opacity: 1;
    transform: translateY(0);
}

.margin-title {
    font-family: var(--sans-margin);
    font-size: 11px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 4px;
}

.margin-sub {
    font-family: var(--serif-display);
    font-style: italic;
    font-size: 14px;
    color: var(--ink-primary);
    margin-bottom: 18px;
    line-height: 1.4;
}

.margin-illustration {
    width: 80px;
    height: 80px;
    margin-bottom: 14px;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 600ms ease, transform 600ms ease;
}

.margin-anchor.visible .margin-illustration {
    opacity: 0.85;
    transform: scale(1);
}

.margin-caption {
    font-family: var(--sans-margin);
    font-size: 12px;
    line-height: 1.55;
    color: var(--copper);
    max-width: 200px;
}

.margin-caption em {
    color: var(--gold);
    font-style: italic;
}

/* ----- Margin notes (footnote container) ----- */
.margin-notes {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.margin-note {
    position: absolute;
    left: 0;
    right: 24px;
    padding: 14px 16px;
    background: var(--bg-paper);
    border-left: 2px solid var(--gold);
    font-family: var(--sans-margin);
    font-size: 13px;
    line-height: 1.6;
    color: var(--ink-primary);
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 400ms ease-out, transform 400ms ease-out;
    pointer-events: auto;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}

.margin-note.visible {
    opacity: 1;
    transform: translateX(0);
}

.margin-note .note-num {
    display: inline-block;
    font-family: var(--serif-display);
    font-style: italic;
    font-size: 16px;
    color: var(--gold);
    margin-right: 6px;
}

.margin-note .note-dismiss {
    font-family: var(--sans-margin);
    font-size: 10px;
    color: var(--copper);
    margin-top: 8px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    cursor: pointer;
}

.margin-note .note-dismiss:hover {
    color: var(--amber);
}

/* leader line connecting footnote ref to margin note */
.leader-line {
    position: absolute;
    height: 1px;
    border-top: 1px dashed var(--copper);
    pointer-events: none;
    opacity: 0;
    transition: opacity 400ms ease;
}

.leader-line.visible { opacity: 0.55; }

/* ===================================================================
   Content river -- main editorial column
   =================================================================== */

.content-river {
    padding: 60px 0 60px 64px;
    max-width: 820px;
}

.entry {
    margin-bottom: 120px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 800ms ease, transform 800ms ease;
}

.entry.visible {
    opacity: 1;
    transform: translateY(0);
}

.entry.fading {
    opacity: 0.85;
    transform: translateY(-10px);
}

.entry-folio {
    font-family: var(--sans-margin);
    font-size: 11px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--copper);
    margin-bottom: 14px;
}

.entry-heading {
    font-family: var(--serif-display);
    font-weight: 700;
    font-size: 36px;
    line-height: 1.2;
    letter-spacing: 0.02em;
    color: var(--ink-primary);
    margin-bottom: 12px;
    text-wrap: balance;
}

.entry-body {
    margin-bottom: 22px;
    max-width: 680px;
    color: var(--ink-primary);
}

.entry:nth-of-type(odd) .entry-body { max-width: 720px; }
.entry:nth-of-type(even) .entry-body { max-width: 680px; }

/* Drop cap */
.entry-body.has-dropcap {
    position: relative;
}

.dropcap {
    float: left;
    font-family: var(--serif-display);
    font-style: italic;
    font-weight: 400;
    font-size: 72px;
    line-height: 0.9;
    color: var(--gold);
    margin: 6px 12px 0 0;
    padding-top: 6px;
    transform-origin: bottom left;
    transform: scale(0.5) rotate(-5deg);
    opacity: 0;
    transition: transform 500ms cubic-bezier(0.34, 1.56, 0.64, 1), opacity 500ms ease;
}

.entry.visible .dropcap {
    transform: scale(1) rotate(0deg);
    opacity: 1;
}

/* Inline technical term */
code.term {
    font-family: var(--mono-term);
    font-size: 0.86em;
    background: var(--bg-paper);
    color: var(--gold);
    padding: 1px 6px;
    border-radius: 2px;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

/* Footnote reference */
.footnote-ref {
    font-family: var(--sans-margin);
    font-size: 0.65em;
    color: var(--gold);
    cursor: pointer;
    padding: 0 2px;
    margin-left: 1px;
    border-radius: 2px;
    transition: color 250ms ease, background 250ms ease;
    user-select: none;
    font-weight: 600;
}

.footnote-ref:hover,
.footnote-ref.active {
    color: var(--amber);
    background: rgba(230, 162, 60, 0.1);
}

.footnote-ref::before { content: "["; opacity: 0.6; }
.footnote-ref::after  { content: "]"; opacity: 0.6; }

/* Ornamental rule */
.ornamental-rule {
    margin: 24px 0 36px;
    max-width: 480px;
}

.ornamental-rule svg {
    width: 100%;
    height: 16px;
    overflow: visible;
}

.final-rule {
    margin-top: 64px;
    max-width: 480px;
}

.final-rule svg { height: 24px; }

/* SVG path draw-on animation */
.rule-anim {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    transition: stroke-dashoffset 800ms ease;
}

.entry.visible .rule-anim {
    stroke-dashoffset: 0;
}

/* Multi-column passage */
.multi-column {
    column-count: 2;
    column-gap: 48px;
    column-rule: 1px solid rgba(139, 115, 85, 0.3);
    margin: 28px 0 32px;
    max-width: 780px;
    text-align: justify;
    hyphens: auto;
}

.multi-column p {
    margin-bottom: 14px;
    break-inside: avoid-column;
}

.multi-column p:first-child::first-letter {
    font-family: var(--serif-display);
    font-weight: 700;
    color: var(--gold);
    font-size: 1.4em;
}

/* Pull-quote */
.pull-quote {
    position: relative;
    font-family: var(--serif-display);
    font-style: italic;
    font-size: 24px;
    line-height: 1.5;
    color: var(--ink-primary);
    max-width: 640px;
    margin: 40px auto 40px 24px;
    padding: 8px 56px;
    text-align: center;
}

.quote-mark {
    font-family: var(--serif-display);
    font-style: italic;
    font-size: 120px;
    line-height: 0.6;
    color: var(--gold);
    opacity: 0.18;
    position: absolute;
    pointer-events: none;
}

.quote-mark:not(.quote-mark-right) {
    top: -8px;
    left: -8px;
}

.quote-mark-right {
    bottom: -42px;
    right: 8px;
}

/* Callout / cautionary marginalia */
.callout {
    margin: 32px 0;
    padding: 22px 26px 22px 30px;
    background: var(--bg-secondary);
    border-left: 3px solid var(--burgundy);
    max-width: 720px;
    position: relative;
}

.callout::after {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: rgba(155, 77, 58, 0.5);
    margin-left: -3px;
}

.callout-label {
    font-family: var(--sans-margin);
    font-size: 11px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--burgundy);
    margin-bottom: 10px;
}

.callout p:last-child { margin-bottom: 0; }

/* Definition block */
.definition-block {
    margin: 32px 0;
    padding: 24px 28px;
    background: var(--bg-paper);
    border: 1px solid rgba(201, 169, 110, 0.25);
    max-width: 700px;
    position: relative;
}

.definition-block::before,
.definition-block::after {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    border: 1px solid var(--gold);
}

.definition-block::before {
    top: -1px;
    left: -1px;
    border-right: none;
    border-bottom: none;
}

.definition-block::after {
    bottom: -1px;
    right: -1px;
    border-left: none;
    border-top: none;
}

.def-term {
    font-family: var(--serif-display);
    font-weight: 700;
    font-size: 22px;
    color: var(--gold);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
}

.def-body {
    font-size: 16px;
    line-height: 1.75;
    margin-bottom: 0;
}

.def-body em {
    color: var(--copper);
    font-style: italic;
}

/* Plate (full-width illustration) */
.plate {
    margin: 80px 0 80px -24px;
    padding: 48px 40px;
    background: var(--bg-secondary);
    border-top: 1px solid rgba(201, 169, 110, 0.25);
    border-bottom: 1px solid rgba(201, 169, 110, 0.25);
    max-width: 860px;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 800ms ease, transform 800ms ease;
}

.plate.visible {
    opacity: 1;
    transform: translateY(0);
}

.plate-label {
    font-family: var(--sans-margin);
    font-size: 11px;
    letter-spacing: 0.36em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 18px;
}

.plate-figure {
    margin-bottom: 18px;
}

.plate-svg {
    width: 100%;
    max-width: 600px;
    height: auto;
}

.plate-caption {
    font-family: var(--serif-display);
    font-style: italic;
    font-size: 14px;
    color: var(--copper);
    max-width: 540px;
    margin: 0 auto;
    line-height: 1.55;
}

/* Glossary (description list) */
.glossary {
    margin: 32px 0;
    max-width: 720px;
    border-top: 1px solid rgba(139, 115, 85, 0.3);
}

.glossary dt {
    margin-top: 22px;
    margin-bottom: 6px;
    padding-top: 18px;
    border-top: 1px dotted rgba(139, 115, 85, 0.25);
}

.glossary dt:first-of-type { border-top: none; padding-top: 4px; margin-top: 14px; }

.glossary dt code.term {
    font-size: 14px;
    background: var(--bg-paper);
}

.glossary dd {
    margin-left: 28px;
    color: var(--ink-primary);
    line-height: 1.75;
}

.glossary dd em {
    color: var(--gold);
    font-style: italic;
}

/* Colophon */
.colophon {
    margin-top: 56px;
    font-style: italic;
    color: var(--ink-primary);
    max-width: 680px;
    line-height: 1.85;
}

.pilcrow {
    color: var(--copper);
    font-size: 1.2em;
    margin-right: 8px;
    font-style: normal;
}

.colophon-imprint {
    margin-top: 36px;
    font-family: var(--sans-margin);
    font-size: 12px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--copper);
    text-align: center;
    line-height: 2;
}

.imprint-rule {
    display: block;
    margin-top: 14px;
    color: var(--gold);
    font-size: 16px;
    letter-spacing: 0.16em;
}

/* ===================================================================
   Links (gold accent links)
   =================================================================== */

a {
    color: var(--gold);
    text-decoration: none;
    border-bottom: 0 solid var(--gold);
    transition: border-bottom-width 250ms ease, color 250ms ease;
    padding-bottom: 1px;
}

a:hover {
    color: var(--amber);
    border-bottom-width: 1px;
}

/* ===================================================================
   Small-screen adjustments (preserves margin column on tablet+,
   collapses to single flow on phone)
   =================================================================== */

@media (max-width: 980px) {
    .codex {
        grid-template-columns: 180px 1fr;
        padding: 0 24px 100px 24px;
    }
    .content-river { padding-left: 36px; }
    .multi-column { column-count: 1; }
    .pull-quote { font-size: 20px; padding: 8px 32px; }
    .entry-heading { font-size: 30px; }
    .margin-anchor { margin-bottom: 160px; }
    .margin-illustration { width: 64px; height: 64px; }
}

@media (max-width: 700px) {
    body { font-size: 16px; line-height: 1.8; }
    .codex { grid-template-columns: 1fr; padding: 0 20px 80px; }
    .margin-column {
        border-right: none;
        border-bottom: 1px solid rgba(139, 115, 85, 0.18);
        padding: 32px 0;
        display: flex;
        flex-wrap: wrap;
        gap: 28px;
    }
    .margin-anchor {
        flex: 1 1 220px;
        margin-bottom: 0;
        opacity: 1;
        transform: none;
    }
    .margin-illustration { opacity: 0.85; transform: scale(1); }
    .margin-notes { display: none; }
    .content-river { padding: 32px 0; }
    .entry { margin-bottom: 80px; }
    .plate { margin: 56px -20px; padding: 36px 24px; }
    .dropcap { font-size: 56px; }
    .hero-title { letter-spacing: 0.04em; }
    .pull-quote { margin-left: 0; padding: 8px 28px; }
    .quote-mark { font-size: 80px; }
}