/* ============================================================
   cbdc.study — Styles
   Classical marble-and-gold material language
   Burgundy-Gold-Mauve analogous palette
   All-serif typographic system
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
    --obsidian-black: #1A1A1E;
    --marble-cream: #F2EDE4;
    --warm-graphite: #2E2A2F;
    --deep-gold: #C9A84C;
    --burgundy-wine: #6B1D3A;
    --muted-rose: #A0616B;
    --dusty-mauve: #8B6E7F;
    --warm-ivory: #F2EDE4;
    --charcoal: #2C2C30;
    --antique-bronze: #7A6533;
    --parchment-mid: #E0D8CC;
    --parchment-light: #E8E0D4;
    --parchment-lighter: #F5F0EA;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    background: var(--obsidian-black);
}

body {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-weight: 400;
    font-size: clamp(1.05rem, 1.3vw, 1.35rem);
    line-height: 1.72;
    letter-spacing: 0.01em;
    color: var(--warm-ivory);
    background: var(--obsidian-black);
    overflow-x: hidden;
}

/* --- Scroll Progress Bar (Classical Column Shaft) --- */
.scroll-progress {
    position: fixed;
    top: 0;
    right: 12px;
    width: 6px;
    height: 100vh;
    z-index: 1000;
    background: repeating-linear-gradient(
        0deg,
        var(--marble-cream) 0px,
        var(--marble-cream) 3px,
        var(--parchment-mid) 3px,
        var(--parchment-mid) 6px
    );
    opacity: 0.4;
    border-radius: 3px;
}

.scroll-progress-fill {
    width: 100%;
    height: 0%;
    background: linear-gradient(180deg, var(--deep-gold) 0%, var(--burgundy-wine) 100%);
    border-radius: 3px;
    transition: height 0.1s linear;
}

/* --- Section Base --- */
.section {
    position: relative;
    padding: 0;
    overflow: hidden;
}

/* --- Dentil Molding Divider --- */
.dentil-divider {
    width: 100%;
    height: 8px;
    background: repeating-linear-gradient(
        90deg,
        var(--deep-gold) 0px,
        var(--deep-gold) 12px,
        transparent 12px,
        transparent 20px
    );
    box-shadow: 0 2px 4px rgba(26, 26, 30, 0.4);
    position: relative;
    z-index: 2;
}

/* --- Section Labels (Cinzel) --- */
.section-label {
    display: block;
    font-family: 'Cinzel', 'Times New Roman', serif;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--muted-rose);
    margin-bottom: 1.2em;
}

.section-label-centered {
    text-align: center;
}

/* --- Section Headings (Playfair Display) --- */
.section-heading {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 900;
    font-size: clamp(2rem, 5vw, 5rem);
    line-height: 1.08;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--deep-gold);
    text-shadow: 2px 2px 0 rgba(201, 168, 76, 0.3);
    margin-bottom: 1.5em;
}

.section-heading-centered {
    text-align: center;
}

/* --- Gold Shimmer Border Animation --- */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes borderDraw {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes crackDraw {
    0% { stroke-dashoffset: 1000; }
    100% { stroke-dashoffset: 0; }
}

@keyframes medallionSpin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Border Animate Mixin via class --- */
.border-animate-top {
    position: relative;
}

.border-animate-top::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--antique-bronze) 0%, var(--deep-gold) 25%, var(--marble-cream) 50%, var(--deep-gold) 75%, var(--antique-bronze) 100%);
    background-size: 200% 100%;
    transition: width 0.8s ease-out;
}

.border-animate-top.is-visible::before {
    width: 100%;
    animation: shimmer 3s ease-in-out infinite;
    animation-delay: 0.8s;
}

/* ============================================================
   SECTION 1: HERO
   ============================================================ */
.section-hero {
    min-height: 100vh;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(107, 29, 58, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(139, 110, 127, 0.06) 0%, transparent 40%),
        conic-gradient(from 127deg at 40% 60%, rgba(46, 42, 47, 0.05) 0%, transparent 15%, rgba(46, 42, 47, 0.04) 30%, transparent 45%),
        linear-gradient(175deg, var(--obsidian-black) 0%, #1E1E22 40%, var(--obsidian-black) 100%);
    display: flex;
    flex-direction: column;
}

.hero-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    flex: 1;
    align-items: end;
    padding: 0 clamp(1.5rem, 3vw, 4rem);
    padding-bottom: 60px;
}

.hero-heading-area {
    grid-column: 1 / 10;
    padding-bottom: 10vh;
}

.hero-title {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 900;
    font-size: clamp(3rem, 8vw, 9rem);
    line-height: 1.08;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--deep-gold);
    text-shadow: 2px 2px 0 rgba(201, 168, 76, 0.3);
    margin-bottom: 0.4em;
}

.hero-subtitle {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1.1rem, 1.8vw, 1.6rem);
    color: var(--dusty-mauve);
    letter-spacing: 0.02em;
    max-width: 600px;
}

.hero-column-area {
    grid-column: 10 / 13;
    display: flex;
    align-items: stretch;
    justify-content: center;
    padding: 40px 0;
}

.column-fragment {
    width: 80px;
    height: 100%;
    min-height: 500px;
    filter: drop-shadow(2px 0 8px rgba(26, 26, 30, 0.5));
    opacity: 0.7;
}

/* ============================================================
   SECTION 2: THE PREMISE
   ============================================================ */
.section-premise {
    background: var(--obsidian-black);
    padding-top: 200px;
    padding-bottom: 0;
}

.premise-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    padding: 0 clamp(1.5rem, 3vw, 4rem);
    padding-bottom: 120px;
}

.premise-rule-area {
    grid-column: 3 / 4;
    display: flex;
    justify-content: center;
    position: relative;
}

.gold-vertical-rule {
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, var(--deep-gold) 20%, var(--deep-gold) 80%, transparent 100%);
    position: relative;
}

.gold-vertical-rule::after {
    content: '';
    position: absolute;
    top: 0;
    left: -1px;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, var(--deep-gold) 20%, var(--marble-cream) 50%, var(--deep-gold) 80%, transparent 100%);
    background-size: 100% 200%;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.section-premise.is-visible .gold-vertical-rule::after {
    opacity: 0.6;
    animation: shimmer 3s ease-in-out infinite;
}

.premise-content-area {
    grid-column: 4 / 13;
    padding-left: clamp(1.5rem, 3vw, 4rem);
}

.premise-text p {
    color: var(--warm-ivory);
    margin-bottom: 2em;
    max-width: 780px;
}

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

/* Marble Frieze */
.marble-frieze {
    width: 100%;
    height: 40px;
    background:
        repeating-linear-gradient(
            90deg,
            rgba(201, 168, 76, 0.15) 0px,
            transparent 4px,
            transparent 30px,
            rgba(201, 168, 76, 0.15) 30px
        ),
        radial-gradient(ellipse at 25% 50%, rgba(107, 29, 58, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 75% 50%, rgba(139, 110, 127, 0.08) 0%, transparent 40%),
        linear-gradient(175deg, var(--marble-cream) 0%, var(--parchment-mid) 50%, var(--parchment-lighter) 100%);
    position: relative;
    overflow: hidden;
}

.marble-frieze::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 300%;
    height: 100%;
    background: repeating-linear-gradient(
        90deg,
        transparent 0px,
        transparent 20px,
        rgba(201, 168, 76, 0.12) 20px,
        rgba(201, 168, 76, 0.12) 24px,
        transparent 24px,
        transparent 60px
    );
    animation: friezeScroll 30s linear infinite;
}

@keyframes friezeScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(33.333%); }
}

/* ============================================================
   SECTION 3: THE ARCHITECTURE
   ============================================================ */
.section-architecture {
    background: var(--obsidian-black);
    padding-top: 200px;
    padding-bottom: 80px;
}

.architecture-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 0 clamp(1rem, 2vw, 2rem);
    padding: 0 clamp(1.5rem, 3vw, 4rem);
    padding-bottom: 120px;
}

.architecture-sidebar {
    grid-column: 1 / 5;
    padding-right: 2rem;
}

.sidebar-text {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-weight: 400;
    font-size: clamp(0.85rem, 1.1vw, 1rem);
    line-height: 1.8;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--dusty-mauve);
    font-variant: small-caps;
    position: sticky;
    top: 30vh;
}

.architecture-main {
    grid-column: 5 / 12;
}

/* Architecture Panels */
.arch-panel {
    position: relative;
    padding: clamp(2rem, 3vw, 3.5rem);
    margin-bottom: -40px;
    border: 2px solid var(--antique-bronze);
    background:
        radial-gradient(ellipse at 30% 40%, rgba(107, 29, 58, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 70%, rgba(139, 110, 127, 0.05) 0%, transparent 40%),
        conic-gradient(from 200deg at 50% 50%, rgba(46, 42, 47, 0.03) 0%, transparent 20%, rgba(46, 42, 47, 0.04) 40%, transparent 60%),
        linear-gradient(160deg, var(--warm-graphite) 0%, #2A262B 40%, var(--warm-graphite) 100%);
    box-shadow:
        0 8px 30px rgba(107, 29, 58, 0.2),
        0 2px 8px rgba(26, 26, 30, 0.4);
    transition: border-color 0.6s ease;
}

.arch-panel:last-child {
    margin-bottom: 0;
}

.arch-panel.panel-1 { z-index: 3; }
.arch-panel.panel-2 { z-index: 2; }
.arch-panel.panel-3 { z-index: 1; }

.arch-panel:hover {
    border-color: var(--deep-gold);
}

.arch-panel::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    height: 4px;
    background: linear-gradient(90deg, var(--antique-bronze) 0%, var(--deep-gold) 25%, var(--marble-cream) 50%, var(--deep-gold) 75%, var(--antique-bronze) 100%);
    background-size: 200% 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.arch-panel:hover::before {
    opacity: 1;
    animation: shimmer 3s ease-in-out infinite;
}

.panel-heading {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 900;
    font-size: clamp(1.3rem, 2.5vw, 2.2rem);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--deep-gold);
    margin-bottom: 0.8em;
    text-shadow: 1px 1px 0 rgba(201, 168, 76, 0.2);
}

.arch-panel p {
    color: var(--warm-ivory);
    max-width: 680px;
}

/* ============================================================
   SECTION 4: THE IMPLICATIONS
   ============================================================ */
.section-implications {
    position: relative;
    padding-top: 200px;
    padding-bottom: 80px;
    background:
        radial-gradient(ellipse at 15% 30%, rgba(107, 29, 58, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 85% 70%, rgba(139, 110, 127, 0.08) 0%, transparent 40%),
        conic-gradient(from 45deg at 60% 40%, rgba(46, 42, 47, 0.05) 0%, transparent 12%, rgba(46, 42, 47, 0.06) 25%, transparent 40%),
        radial-gradient(ellipse at 50% 90%, rgba(201, 168, 76, 0.04) 0%, transparent 50%),
        linear-gradient(170deg, var(--marble-cream) 0%, var(--parchment-light) 30%, var(--parchment-lighter) 60%, var(--marble-cream) 100%);
}

.implications-content {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    padding: 0 clamp(1.5rem, 3vw, 4rem);
    padding-bottom: 120px;
}

.implications-content .section-label {
    grid-column: 2 / 12;
    color: var(--burgundy-wine);
}

.implications-content .section-heading {
    grid-column: 2 / 12;
    color: var(--obsidian-black);
    text-shadow: 1px 1px 0 rgba(26, 26, 30, 0.1);
}

.implications-body {
    grid-column: 2 / 12;
}

.implications-body > p {
    color: var(--charcoal);
    margin-bottom: 2em;
    max-width: 780px;
}

/* Pull Quotes */
.pull-quote {
    margin: 2.5em 0;
    padding: 0;
}

.pull-quote p {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 900;
    font-style: italic;
    font-size: clamp(1.4rem, 2.5vw, 2.2rem);
    line-height: 1.35;
    color: var(--burgundy-wine);
    border-left: 3px solid var(--deep-gold);
    padding-left: 1.5em;
    max-width: none;
}

.pull-quote-left {
    margin-left: -3vw;
}

.pull-quote-right {
    margin-left: 5vw;
}

.pull-quote-right p {
    border-left: none;
    border-right: 3px solid var(--deep-gold);
    padding-left: 0;
    padding-right: 1.5em;
    text-align: right;
}

/* Stress Fracture SVGs */
.stress-fracture {
    position: absolute;
    pointer-events: none;
    z-index: 1;
}

.fracture-1 {
    top: 10%;
    left: 0;
    width: 30%;
    height: 70%;
    opacity: 0;
    transition: opacity 1s ease;
}

.fracture-2 {
    top: 20%;
    right: 0;
    width: 25%;
    height: 60%;
    opacity: 0;
    transition: opacity 1s ease;
}

.section-implications.cracks-visible .fracture-1,
.section-implications.cracks-visible .fracture-2 {
    opacity: 0.5;
}

.crack-path {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
}

.section-implications.cracks-visible .crack-path {
    animation: crackDraw 3s ease-out forwards;
}

.section-implications.cracks-visible .crack-branch {
    animation: crackDraw 2s ease-out 1s forwards;
}

/* ============================================================
   SECTION 5: THE TIMELINE
   ============================================================ */
.section-timeline {
    background: var(--obsidian-black);
    padding-top: 200px;
    padding-bottom: 80px;
}

.section-timeline .section-label {
    padding: 0 clamp(1.5rem, 3vw, 4rem);
}

.section-timeline .section-heading {
    padding: 0 clamp(1.5rem, 3vw, 4rem);
}

.entablature-container {
    margin-top: 3em;
    padding: 0 clamp(1.5rem, 3vw, 4rem);
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--deep-gold) var(--warm-graphite);
    margin-bottom: 120px;
}

.entablature-container::-webkit-scrollbar {
    height: 6px;
}

.entablature-container::-webkit-scrollbar-track {
    background: var(--warm-graphite);
}

.entablature-container::-webkit-scrollbar-thumb {
    background: var(--deep-gold);
    border-radius: 3px;
}

.entablature-track {
    position: relative;
    padding: 2rem 0;
    border-top: 3px solid var(--antique-bronze);
    border-bottom: 3px solid var(--antique-bronze);
}

.entablature-track::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--burgundy-wine);
    opacity: 0.4;
}

.entablature-track::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--burgundy-wine);
    opacity: 0.4;
}

.timeline-scroll {
    display: flex;
    gap: clamp(2rem, 4vw, 4rem);
    padding: 2rem 1rem;
    min-width: max-content;
}

.timeline-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 220px;
    flex-shrink: 0;
    text-align: center;
}

/* Medallion */
.medallion {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background:
        radial-gradient(ellipse at 40% 40%, rgba(107, 29, 58, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 60%, rgba(139, 110, 127, 0.06) 0%, transparent 40%),
        linear-gradient(150deg, var(--marble-cream) 0%, var(--parchment-mid) 50%, var(--parchment-lighter) 100%);
    margin-bottom: 1.2em;
    cursor: default;
    transition: transform 0.3s ease;
}

.medallion::before {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px solid var(--antique-bronze);
    transition: border-color 0.6s ease;
}

.medallion::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 50%;
    border: 1px solid var(--muted-rose);
}

.medallion:hover::before {
    border-color: var(--deep-gold);
    animation: medallionSpin 4s linear infinite;
}

.medallion:hover {
    transform: scale(1.05);
}

.medallion-year {
    font-family: 'Cinzel', 'Times New Roman', serif;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--obsidian-black);
}

.timeline-text {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--dusty-mauve);
    max-width: 200px;
}

/* ============================================================
   SECTION 6: THE RECKONING
   ============================================================ */
.section-reckoning {
    background:
        radial-gradient(ellipse at 50% 30%, rgba(107, 29, 58, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 30% 80%, rgba(139, 110, 127, 0.06) 0%, transparent 40%),
        conic-gradient(from 300deg at 50% 50%, rgba(46, 42, 47, 0.04) 0%, transparent 20%),
        linear-gradient(175deg, var(--obsidian-black) 0%, #1E1E22 50%, var(--obsidian-black) 100%);
    padding-top: 200px;
    padding-bottom: 120px;
    text-align: center;
}

.reckoning-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 3vw, 4rem);
}

.reckoning-content .section-label {
    text-align: center;
}

.reckoning-heading {
    text-align: center;
    font-size: clamp(2.5rem, 6vw, 6rem);
    margin-bottom: 1em;
}

.reckoning-text {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-weight: 400;
    font-size: clamp(1.05rem, 1.3vw, 1.35rem);
    line-height: 1.72;
    color: var(--warm-ivory);
    text-align: left;
    margin-bottom: 3em;
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
}

.closing-ornament {
    margin: 2em auto;
    width: 200px;
}

.ornament-svg {
    width: 100%;
    height: auto;
}

.closing-inscription {
    font-family: 'Cinzel', 'Times New Roman', serif;
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--dusty-mauve);
    margin-top: 2em;
}

/* ============================================================
   SCROLL-TRIGGERED VISIBILITY STATES
   ============================================================ */

/* Border draw entrance for sections */
.section-premise,
.section-architecture,
.section-implications,
.section-timeline,
.section-reckoning {
    border-top: 0px solid transparent;
    position: relative;
}

.section-premise::before,
.section-architecture::before,
.section-timeline::before,
.section-reckoning::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--antique-bronze) 0%, var(--deep-gold) 25%, var(--marble-cream) 50%, var(--deep-gold) 75%, var(--antique-bronze) 100%);
    background-size: 200% 100%;
    z-index: 5;
    transition: width 1s ease-out;
}

.section-premise.is-visible::before,
.section-architecture.is-visible::before,
.section-timeline.is-visible::before,
.section-reckoning.is-visible::before {
    width: 100%;
    animation: shimmer 3s ease-in-out infinite;
    animation-delay: 1s;
}

/* Panel stagger entrance */
.arch-panel {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.6s ease;
}

.section-architecture.is-visible .arch-panel.panel-1 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0s;
}

.section-architecture.is-visible .arch-panel.panel-2 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.15s;
}

.section-architecture.is-visible .arch-panel.panel-3 {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}

/* Hero fade in */
.hero-heading-area {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease 0.3s, transform 1s ease 0.3s;
}

.section-hero.is-visible .hero-heading-area {
    opacity: 1;
    transform: translateY(0);
}

.hero-column-area {
    opacity: 0;
    transition: opacity 1.5s ease 0.8s;
}

.section-hero.is-visible .hero-column-area {
    opacity: 1;
}

/* Implications section */
.implications-content .section-label,
.implications-content .section-heading,
.implications-body {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-implications.is-visible .section-label {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0s;
}

.section-implications.is-visible .section-heading {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.15s;
}

.section-implications.is-visible .implications-body {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}

/* Timeline nodes entrance */
.timeline-node {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section-timeline.is-visible .timeline-node:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0.0s; }
.section-timeline.is-visible .timeline-node:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 0.15s; }
.section-timeline.is-visible .timeline-node:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 0.3s; }
.section-timeline.is-visible .timeline-node:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 0.45s; }
.section-timeline.is-visible .timeline-node:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 0.6s; }
.section-timeline.is-visible .timeline-node:nth-child(6) { opacity: 1; transform: translateY(0); transition-delay: 0.75s; }
.section-timeline.is-visible .timeline-node:nth-child(7) { opacity: 1; transform: translateY(0); transition-delay: 0.9s; }
.section-timeline.is-visible .timeline-node:nth-child(8) { opacity: 1; transform: translateY(0); transition-delay: 1.05s; }

/* Reckoning entrance */
.reckoning-content {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease, transform 1s ease;
}

.section-reckoning.is-visible .reckoning-content {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }

    .hero-heading-area {
        grid-column: 1;
    }

    .hero-column-area {
        display: none;
    }

    .premise-grid {
        grid-template-columns: 1fr;
    }

    .premise-rule-area {
        display: none;
    }

    .premise-content-area {
        grid-column: 1;
        padding-left: 0;
    }

    .architecture-grid {
        grid-template-columns: 1fr;
    }

    .architecture-sidebar {
        grid-column: 1;
        margin-bottom: 3em;
    }

    .architecture-main {
        grid-column: 1;
    }

    .sidebar-text {
        position: static;
    }

    .implications-content {
        grid-template-columns: 1fr;
    }

    .implications-content .section-label,
    .implications-content .section-heading,
    .implications-body {
        grid-column: 1;
    }

    .pull-quote-left {
        margin-left: 0;
    }

    .pull-quote-right {
        margin-left: 0;
    }
}

@media (max-width: 640px) {
    .section-premise,
    .section-architecture,
    .section-implications,
    .section-timeline,
    .section-reckoning {
        padding-top: 100px;
    }

    .hero-title {
        font-size: clamp(2.5rem, 12vw, 4.5rem);
    }

    .section-heading {
        font-size: clamp(1.8rem, 7vw, 3rem);
    }

    .reckoning-heading {
        font-size: clamp(2rem, 9vw, 3.5rem);
    }

    .arch-panel {
        margin-bottom: 1rem;
    }

    .medallion {
        width: 100px;
        height: 100px;
    }

    .timeline-node {
        width: 180px;
    }
}