/* ============================================
   concepts.news - Styles
   Warm burgundy-dark gallery aesthetic
   "Intellectual noir" - Milanese gallery at midnight
   ============================================ */

/* --- Color Palette Reference ---
   Background (Primary):   #1A0A0F  Deep burgundy-black
   Background (Secondary): #2A1520  Lighter burgundy shadow
   Accent (Cream):         #F5E6D3  Warm cream
   Text (Body):            #D4B5A0  Warm taupe
   Text (Metadata):        #8B6F5E  Muted bronze
   Highlight (Burgundy):   #6B2D3E  Active burgundy
   Marble White:           #E8DDD3  Off-white warm
   Gold Accent:            #C4956A  Burnished gold
   -------------------------------------------- */

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

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

body {
    background-color: #1A0A0F;
    color: #D4B5A0;
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-weight: 400;
    line-height: 1.75;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1, h2, h3 {
    font-family: 'Josefin Sans', 'Futura', sans-serif;
    font-weight: 300;
    color: #F5E6D3;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

/* --- Vertical Navigation Strip --- */
#nav-strip {
    position: fixed;
    left: 0;
    top: 0;
    width: 40px;
    height: 100vh;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
}

/* 2px cream strip along left edge with entasis curve */
#nav-strip::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    width: 2px;
    height: 100%;
    background-color: #F5E6D3;
    opacity: 0.15;
    clip-path: ellipse(60% 50% at 50% 50%);
}

.nav-marker {
    position: relative;
    width: 40px;
    height: 25vh;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity 400ms ease-in-out;
    opacity: 0.4;
}

.nav-marker.active {
    opacity: 1;
}

.nav-number {
    font-family: 'Space Mono', monospace;
    font-size: clamp(0.55rem, 0.8vw, 0.7rem);
    color: #8B6F5E;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
    transition: color 400ms ease-in-out;
}

.nav-marker.active .nav-number {
    color: #F5E6D3;
}

.nav-marker:hover .nav-number {
    color: #C4956A;
}

/* Small dot indicator on active marker */
.nav-marker::after {
    content: '';
    position: absolute;
    left: 16px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: #C4956A;
    opacity: 0;
    transition: opacity 400ms ease-in-out;
}

.nav-marker.active::after {
    opacity: 1;
}

/* --- Marble Dust Particles --- */
#marble-dust {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 50;
    overflow: hidden;
}

.dust-particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background-color: #E8DDD3;
    border-radius: 50%;
    opacity: 0;
    animation: dustFloat linear infinite;
}

@keyframes dustFloat {
    0% {
        opacity: 0;
        transform: translateY(100vh) translateX(0);
    }
    8% {
        opacity: 0.3;
    }
    25% {
        transform: translateY(70vh) translateX(15px);
    }
    50% {
        opacity: 0.15;
        transform: translateY(45vh) translateX(-10px);
    }
    75% {
        transform: translateY(20vh) translateX(25px);
        opacity: 0.25;
    }
    90% {
        opacity: 0.12;
    }
    100% {
        opacity: 0;
        transform: translateY(-10vh) translateX(40px);
    }
}

/* --- Plates (Gallery Rooms) --- */
.plate {
    position: relative;
    width: 100%;
    min-height: 100vh;
    overflow: hidden;
}

.plate-content {
    position: relative;
    width: 100%;
    height: 100vh;
    padding: 0 120px 0 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Plate dividers - 4px cream whisper between sections */
.plate-divider {
    width: 100%;
    height: 4px;
    background-color: #F5E6D3;
    opacity: 0.08;
    position: relative;
    z-index: 10;
}

/* Pediment section terminators - shallow triangle chevrons (<5 degree angle) */
.plate::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 5px;
    background-color: #F5E6D3;
    opacity: 0.06;
    clip-path: polygon(5% 100%, 50% 0%, 95% 100%);
    z-index: 11;
}

/* ============================================
   PLATE 1: HERO
   Single marble sphere, dead center, dramatic lighting
   ============================================ */
.hero-content {
    gap: 0;
    position: relative;
}

.hero-title {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(2.8rem, 7vw, 5.5rem);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #F5E6D3;
    text-align: center;
    position: relative;
    z-index: 2;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(20px);
    animation: heroFadeIn 1200ms ease-out 300ms forwards;
}

.hero-subtitle {
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: clamp(1.6rem, 4vw, 3.3rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #8B6F5E;
    text-align: center;
    position: relative;
    z-index: 2;
    margin-top: 40px;
    opacity: 0;
    transform: translateY(20px);
    animation: heroFadeIn 1200ms ease-out 600ms forwards;
}

/* Edition marker - top right corner of hero (Z-pattern anchor) */
.hero-edition-marker {
    position: absolute;
    top: 40px;
    right: 40px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    opacity: 0;
    animation: heroFadeIn 1200ms ease-out 900ms forwards;
}

.edition-label {
    font-family: 'Space Mono', monospace;
    font-size: clamp(0.6rem, 0.9vw, 0.75rem);
    color: #C4956A;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.edition-date {
    font-family: 'Space Mono', monospace;
    font-size: clamp(0.55rem, 0.8vw, 0.65rem);
    color: #8B6F5E;
    letter-spacing: 0.08em;
}

@keyframes heroFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   MARBLE SPHERE
   CSS representation of 3D marble object
   Lit from upper-left, warm gold #C4956A
   ============================================ */
.marble-sphere {
    position: relative;
    width: clamp(180px, 25vw, 320px);
    height: clamp(180px, 25vw, 320px);
    z-index: 2;
    opacity: 0;
    animation: heroFadeIn 1200ms ease-out 150ms forwards;
    transition: transform 150ms ease-out;
}

.sphere-body {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    position: relative;
    /* Marble-like gradient with subsurface scattering feel */
    background: radial-gradient(
        ellipse at 35% 30%,
        #F5E6D3 0%,
        #E8DDD3 12%,
        #D4B5A0 28%,
        #C4956A 38%,
        #8B6F5E 52%,
        #6B2D3E 68%,
        #2A1520 82%,
        #1A0A0F 100%
    );
    /* Dramatic chiaroscuro lighting from upper-left */
    box-shadow:
        -30px 30px 60px rgba(26, 10, 15, 0.8),
        inset -10px 10px 30px rgba(26, 10, 15, 0.4),
        0 0 80px rgba(196, 149, 106, 0.12),
        0 0 160px rgba(196, 149, 106, 0.05);
    /* 360 degrees per 60 seconds rotation */
    animation: sphereRotate 60000ms linear infinite;
    overflow: hidden;
}

/* Upper-left warm gold highlight - simulates directional light */
.sphere-highlight {
    position: absolute;
    top: 12%;
    left: 18%;
    width: 35%;
    height: 30%;
    border-radius: 50%;
    background: radial-gradient(
        ellipse at center,
        rgba(245, 230, 211, 0.55) 0%,
        rgba(196, 149, 106, 0.25) 35%,
        rgba(245, 230, 211, 0.08) 60%,
        transparent 80%
    );
}

/* Carved spiral channel on sphere surface - primary */
.sphere-channel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: rgba(196, 149, 106, 0.3);
    border-right-color: rgba(196, 149, 106, 0.12);
    transform: rotate(-30deg);
}

/* Inner spiral channel ring */
.sphere-channel-inner {
    position: absolute;
    top: 15%;
    left: 15%;
    width: 70%;
    height: 70%;
    border-radius: 50%;
    border: 1.5px solid transparent;
    border-bottom-color: rgba(196, 149, 106, 0.22);
    border-left-color: rgba(196, 149, 106, 0.08);
    transform: rotate(60deg);
}

/* Core spiral channel ring */
.sphere-channel-core {
    position: absolute;
    top: 30%;
    left: 30%;
    width: 40%;
    height: 40%;
    border-radius: 50%;
    border: 1px solid transparent;
    border-top-color: rgba(232, 221, 211, 0.18);
    transform: rotate(-15deg);
}

/* Marble veins */
.sphere-vein {
    position: absolute;
    border-radius: 50%;
    opacity: 0.08;
}

.sphere-vein-1 {
    top: 20%;
    left: 40%;
    width: 45%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #C4956A, transparent);
    transform: rotate(-25deg);
}

.sphere-vein-2 {
    top: 55%;
    left: 15%;
    width: 35%;
    height: 1px;
    background: linear-gradient(90deg, transparent, #E8DDD3, transparent);
    transform: rotate(15deg);
}

.sphere-vein-3 {
    top: 38%;
    left: 50%;
    width: 30%;
    height: 1px;
    background: linear-gradient(90deg, transparent, #D4B5A0, transparent);
    transform: rotate(-40deg);
}

/* Sphere ground shadow */
.sphere-shadow {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 20px;
    background: radial-gradient(
        ellipse at center,
        rgba(26, 10, 15, 0.6) 0%,
        transparent 70%
    );
    filter: blur(10px);
}

@keyframes sphereRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================
   PLATE 2: FEATURED CONCEPTS (Cards)
   Z-pattern layout: diagonal arrangement
   ============================================ */
.featured-content {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 60px 120px 60px 80px;
}

/* Z-pattern decorative guide line - subtle diagonal hint */
.z-pattern-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.z-pattern-line::before {
    content: '';
    position: absolute;
    top: 22%;
    left: 18%;
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, rgba(196, 149, 106, 0.06), rgba(196, 149, 106, 0.02), transparent);
    transform: rotate(25deg);
    transform-origin: left center;
}

/* Card System - Golden ratio aspect (1:1.618) */
.concept-card {
    position: absolute;
    width: clamp(200px, 20vw, 280px);
    height: 0;
    padding-bottom: clamp(324px, 32.36vw, 453px);
    perspective: 1200px;
    cursor: pointer;
    z-index: 2;
}

/* Z-pattern positioning:
   Left: top-left quadrant
   Center: center diagonal
   Right: bottom-right quadrant */
.card-left {
    left: 15%;
    top: 15%;
}

.card-center {
    left: 42%;
    top: 35%;
}

.card-right {
    left: 68%;
    top: 55%;
}

/* Card flip with preserve-3d */
.card-inner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 600ms cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* Initial persistent tilt for physicality (2-3 degrees on X-axis) */
.concept-card[data-tilt="-2"] .card-inner {
    transform: rotateX(-2deg);
}

.concept-card[data-tilt="3"] .card-inner {
    transform: rotateX(3deg);
}

.concept-card[data-tilt="-1.5"] .card-inner {
    transform: rotateX(-1.5deg);
}

/* Flipped state - triggered by class toggle */
.concept-card.flipped .card-inner {
    transform: rotateY(180deg);
}

/* Card faces */
.card-front,
.card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 4px;
    overflow: hidden;
}

.card-front {
    background-color: #2A1520;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    border: 1px solid rgba(196, 149, 106, 0.1);
    transition: border-color 400ms ease-in-out, box-shadow 400ms ease-in-out;
}

.concept-card:hover .card-front {
    border-color: #C4956A;
    box-shadow: 0 0 30px rgba(196, 149, 106, 0.08);
}

.concept-card.flipped .card-front {
    border-color: #C4956A;
}

.card-back {
    background-color: #2A1520;
    transform: rotateY(180deg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
    border: 1px solid #C4956A;
    /* Marble veined texture at low opacity - Calacatta gold pattern */
    background-image:
        linear-gradient(135deg, rgba(232, 221, 211, 0.04) 0%, transparent 50%),
        linear-gradient(225deg, rgba(196, 149, 106, 0.03) 0%, transparent 40%),
        linear-gradient(315deg, rgba(232, 221, 211, 0.025) 10%, transparent 60%),
        linear-gradient(45deg, rgba(196, 149, 106, 0.02) 0%, transparent 35%),
        linear-gradient(170deg, rgba(232, 221, 211, 0.015) 0%, transparent 30%);
    background-color: #2A1520;
}

.card-back-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.card-meta {
    font-family: 'Space Mono', monospace;
    font-size: clamp(0.55rem, 0.8vw, 0.7rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #8B6F5E;
}

.card-title {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(1.1rem, 2vw, 1.6rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #F5E6D3;
    line-height: 1.3;
}

.card-excerpt {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(0.85rem, 1.2vw, 1rem);
    color: #D4B5A0;
    line-height: 1.65;
}

.card-read {
    font-family: 'Space Mono', monospace;
    font-size: clamp(0.6rem, 0.8vw, 0.75rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #C4956A;
    margin-top: 8px;
    transition: color 400ms ease-in-out, letter-spacing 400ms ease-in-out;
}

.concept-card.flipped:hover .card-read {
    letter-spacing: 0.14em;
}

.card-label {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(0.7rem, 1.2vw, 1rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #8B6F5E;
    transition: color 400ms ease-in-out;
}

.concept-card:hover .card-label {
    color: #D4B5A0;
}

/* Card flip mid-animation shadow enhancement */
@keyframes cardFlipShadow {
    0% { box-shadow: 0 5px 15px rgba(26, 10, 15, 0.3); }
    50% { box-shadow: 0 25px 60px rgba(26, 10, 15, 0.8); }
    100% { box-shadow: 0 8px 20px rgba(26, 10, 15, 0.4); }
}

.concept-card.flipping .card-inner {
    animation: cardFlipShadow 600ms cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* ============================================
   Card CSS Sculptures
   Abstract marble objects for each category
   ============================================ */
.card-object {
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mini-sculpture {
    position: relative;
    width: 80px;
    height: 80px;
}

/* Arches sculpture (Philosophy) - interlocking arches */
.sculpture-arches {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 0;
}

.arch {
    border: 2px solid #E8DDD3;
    border-bottom: none;
    border-radius: 50% 50% 0 0;
}

.arch-1 {
    width: 64px;
    height: 38px;
    opacity: 0.9;
}

.arch-2 {
    width: 44px;
    height: 54px;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.6;
}

.arch-3 {
    width: 26px;
    height: 70px;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.35;
}

/* Spiral sculpture (Technology) - spiraling columns */
.sculpture-spiral {
    display: flex;
    align-items: center;
    justify-content: center;
}

.spiral-segment {
    position: absolute;
    border: 1.5px solid #E8DDD3;
    border-radius: 50%;
}

.seg-1 {
    width: 64px;
    height: 64px;
    border-color: rgba(232, 221, 211, 0.8);
    clip-path: polygon(50% 0%, 100% 0%, 100% 100%, 50% 100%);
}

.seg-2 {
    width: 50px;
    height: 50px;
    border-color: rgba(232, 221, 211, 0.6);
    clip-path: polygon(0% 50%, 100% 50%, 100% 100%, 0% 100%);
    transform: translateX(-3px);
}

.seg-3 {
    width: 38px;
    height: 38px;
    border-color: rgba(232, 221, 211, 0.4);
    clip-path: polygon(0% 0%, 50% 0%, 50% 100%, 0% 100%);
    transform: translateX(2px) translateY(-2px);
}

.seg-4 {
    width: 24px;
    height: 24px;
    border-color: rgba(232, 221, 211, 0.25);
    clip-path: polygon(0% 0%, 100% 0%, 100% 50%, 0% 50%);
    transform: translateY(2px);
}

/* Planes sculpture (Culture) - fragmented planes */
.sculpture-planes {
    display: flex;
    align-items: center;
    justify-content: center;
}

.plane {
    position: absolute;
    background: linear-gradient(135deg, rgba(232, 221, 211, 0.3) 0%, rgba(232, 221, 211, 0.05) 100%);
    border: 1px solid rgba(232, 221, 211, 0.2);
}

.plane-1 {
    width: 52px;
    height: 42px;
    transform: rotate(-15deg) translateX(-8px) translateY(-5px);
}

.plane-2 {
    width: 46px;
    height: 36px;
    transform: rotate(10deg) translateX(5px) translateY(8px);
    opacity: 0.7;
}

.plane-3 {
    width: 36px;
    height: 28px;
    transform: rotate(-5deg) translateX(12px) translateY(-10px);
    opacity: 0.4;
}

/* ============================================
   PLATE 3: EDITION ARCHIVE
   Vertical timeline with hover reveals
   ============================================ */
.archive-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 80px 120px 80px 100px;
}

.archive-heading {
    text-align: right;
    max-width: 400px;
}

.archive-title {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(2rem, 5vw, 4rem);
    letter-spacing: 0.15em;
    color: #F5E6D3;
    margin-bottom: 16px;
}

.archive-subtitle {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: clamp(1rem, 1.5vw, 1.3rem);
    color: #8B6F5E;
    line-height: 1.6;
}

.archive-timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding-left: 40px;
}

.timeline-line {
    position: absolute;
    left: 43px;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, transparent, #8B6F5E 15%, #8B6F5E 85%, transparent);
    opacity: 0.3;
}

.timeline-entry {
    position: relative;
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 0;
    cursor: pointer;
    transition: opacity 400ms ease-in-out;
    opacity: 0.5;
}

.timeline-entry:hover {
    opacity: 1;
}

.timeline-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #E8DDD3;
    flex-shrink: 0;
    transition: background-color 400ms ease-in-out, box-shadow 400ms ease-in-out, transform 400ms ease-in-out;
    z-index: 2;
}

.timeline-entry:hover .timeline-dot {
    background-color: #C4956A;
    box-shadow: 0 0 12px rgba(196, 149, 106, 0.4);
    transform: scale(1.3);
}

.timeline-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 140px;
}

.timeline-number {
    font-family: 'Space Mono', monospace;
    font-size: clamp(0.8rem, 1.2vw, 1.1rem);
    color: #F5E6D3;
    letter-spacing: 0.08em;
}

.timeline-date {
    font-family: 'Space Mono', monospace;
    font-size: clamp(0.55rem, 0.7vw, 0.7rem);
    color: #8B6F5E;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.timeline-concept {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(0.7rem, 1vw, 0.9rem);
    color: #D4B5A0;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    transition: color 400ms ease-in-out;
}

.timeline-entry:hover .timeline-concept {
    color: #F5E6D3;
}

/* Slide-reveal preview on hover - slides in from right */
.timeline-preview {
    position: absolute;
    right: -180px;
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 400ms ease-out, transform 400ms ease-out;
    pointer-events: none;
}

.timeline-entry:hover .timeline-preview {
    opacity: 1;
    transform: translateX(0);
}

/* Small preview sculptures - marble spheres */
.preview-sculpture {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(26, 10, 15, 0.5);
}

.preview-sphere-small {
    background: radial-gradient(
        ellipse at 35% 30%,
        #E8DDD3 0%,
        #D4B5A0 30%,
        #8B6F5E 55%,
        #2A1520 85%
    );
}

.preview-arches-small {
    background: radial-gradient(
        ellipse at 40% 35%,
        #F5E6D3 0%,
        #C4956A 25%,
        #6B2D3E 60%,
        #2A1520 90%
    );
}

.preview-column-small {
    background: radial-gradient(
        ellipse at 30% 25%,
        #E8DDD3 0%,
        #8B6F5E 40%,
        #2A1520 80%
    );
}

.preview-planes-small {
    background: radial-gradient(
        ellipse at 45% 35%,
        #D4B5A0 0%,
        #6B2D3E 45%,
        #1A0A0F 85%
    );
}

/* ============================================
   PLATE 4: ABOUT
   Pure typography on darkness - dramatic restraint
   ============================================ */
.about-content {
    justify-content: center;
    align-items: center;
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
    padding: 80px 60px;
}

/* Horizontal cream lines above and below text - 60% viewport width */
.about-line-top,
.about-line-bottom {
    width: 60vw;
    max-width: 600px;
    height: 1px;
    background-color: #F5E6D3;
    opacity: 0.2;
}

.about-text {
    max-width: 680px;
    text-align: center;
}

.about-quote {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 400;
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    line-height: 1.75;
    color: #D4B5A0;
}

.about-quote em {
    font-style: italic;
    color: #F5E6D3;
}

.about-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
}

.footer-mark {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(0.8rem, 1.2vw, 1rem);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #F5E6D3;
}

.footer-edition {
    font-family: 'Space Mono', monospace;
    font-size: clamp(0.55rem, 0.7vw, 0.7rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #8B6F5E;
}

/* ============================================
   SCROLL FADE-IN ANIMATIONS
   1200ms ease-out with 100ms stagger
   ============================================ */
.fade-in-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1200ms ease-out, transform 1200ms ease-out;
}

.fade-in-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays for grouped elements */
.fade-in-element.stagger-1 { transition-delay: 0ms; }
.fade-in-element.stagger-2 { transition-delay: 100ms; }
.fade-in-element.stagger-3 { transition-delay: 200ms; }
.fade-in-element.stagger-4 { transition-delay: 300ms; }
.fade-in-element.stagger-5 { transition-delay: 400ms; }

/* ============================================
   MARBLE COLUMN DIVIDER MOTIF
   CSS-generated columns with marble gradient
   Stands between content sections
   ============================================ */
.marble-column-divider {
    width: 2px;
    height: 60px;
    background: linear-gradient(
        to bottom,
        transparent,
        #D4B5A0 20%,
        #E8DDD3 50%,
        #D4B5A0 80%,
        transparent
    );
    opacity: 0.15;
    margin: 0 auto;
}

/* ============================================
   SCROLL HINT (Hero Plate)
   ============================================ */
#scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.4;
    transition: opacity 1200ms ease-out;
    animation: scrollHintPulse 3000ms ease-in-out infinite;
}

#scroll-hint.hidden {
    opacity: 0;
    pointer-events: none;
}

.scroll-hint-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, #F5E6D3);
    position: relative;
}

.scroll-hint-line::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #F5E6D3;
    animation: scrollDotDrift 2500ms ease-in-out infinite;
}

@keyframes scrollHintPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

@keyframes scrollDotDrift {
    0% { transform: translateX(-50%) translateY(-30px); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateX(-50%) translateY(0); opacity: 0; }
}

/* ============================================
   RESPONSIVE: TABLET (768-1024px)
   6-column grid, 32px gutters, 60px margins
   ============================================ */
@media (max-width: 1024px) {
    .plate-content {
        padding: 60px 60px 60px 60px;
    }

    .featured-content {
        padding: 60px 60px;
    }

    .card-left {
        left: 10%;
        top: 12%;
    }

    .card-center {
        left: 38%;
        top: 33%;
    }

    .card-right {
        left: 62%;
        top: 55%;
    }

    .concept-card {
        width: clamp(170px, 22vw, 240px);
        padding-bottom: clamp(275px, 35.6vw, 388px);
    }

    .archive-content {
        flex-direction: column;
        gap: 40px;
        padding: 80px 60px;
    }

    .archive-heading {
        text-align: center;
    }

    .timeline-preview {
        display: none;
    }

    .hero-edition-marker {
        right: 20px;
        top: 20px;
    }
}

/* ============================================
   RESPONSIVE: MOBILE (<768px)
   4-column grid, 20px gutters, 24px margins
   Z collapses to vertical stack
   ============================================ */
@media (max-width: 768px) {
    #nav-strip {
        width: 30px;
    }

    #nav-strip::before {
        left: 14px;
    }

    .nav-marker::after {
        left: 10px;
    }

    .plate-content {
        padding: 40px 24px 40px 40px;
    }

    /* Hero mobile */
    .hero-title {
        font-size: clamp(2rem, 10vw, 3rem);
        letter-spacing: 0.15em;
    }

    .hero-subtitle {
        font-size: clamp(1.2rem, 6vw, 1.8rem);
    }

    .marble-sphere {
        width: 150px;
        height: 150px;
    }

    .hero-edition-marker {
        position: relative;
        top: auto;
        right: auto;
        align-items: center;
        margin-top: 30px;
    }

    /* Cards stack vertically on mobile */
    .featured-content {
        flex-direction: column;
        position: relative;
        padding: 40px 24px 40px 40px;
        height: auto;
        min-height: 100vh;
        gap: 30px;
        justify-content: center;
        align-items: center;
    }

    .concept-card {
        position: relative;
        left: auto;
        top: auto;
        width: 240px;
        padding-bottom: 388px;
    }

    .z-pattern-line {
        display: none;
    }

    /* Archive mobile */
    .archive-content {
        flex-direction: column;
        padding: 60px 24px 60px 50px;
        gap: 40px;
        height: auto;
        min-height: 100vh;
    }

    .archive-heading {
        text-align: center;
        order: -1;
    }

    .archive-timeline {
        padding-left: 20px;
    }

    .timeline-line {
        left: 23px;
    }

    .timeline-preview {
        display: none;
    }

    /* About mobile */
    .about-content {
        padding: 60px 30px;
    }

    .about-quote {
        font-size: clamp(1.1rem, 4vw, 1.4rem);
    }
}