:root {
    --color-obsidian: #1A1108;
    --color-deep-brown: #6B2D1A;
    --color-gold-primary: #B8741A;
    --color-gold-bright: #C9A84C;
    --color-gold-muted: #B8965A;
    --color-gold-pale: #F5E6A3;
    --color-cream: #FAF3E0;
    --color-taupe: #8B7D5E;
    --color-sand: #D4C5A0;

    --font-display: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --font-accent: 'Cormorant Garamond', serif;
}

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

html {
    overflow: hidden;
    height: 100%;
}

body {
    font-family: var(--font-body);
    background: var(--color-obsidian);
    color: var(--color-cream);
    height: 100vh;
    overflow: hidden;
    cursor: default;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 3rem;
    pointer-events: none;
}

.nav__logo {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 0.75rem;
    letter-spacing: 0.4em;
    color: var(--color-gold-bright);
    pointer-events: auto;
}

.nav__chambers {
    display: flex;
    gap: 0.75rem;
    pointer-events: auto;
}

.nav__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid var(--color-gold-muted);
    background: transparent;
    cursor: pointer;
    transition: background 0.4s ease, transform 0.4s ease;
}

.nav__dot.active {
    background: var(--color-gold-bright);
    transform: scale(1.3);
}

.nav__dot:hover {
    background: var(--color-gold-muted);
}

/* Scroll Indicator */
.scroll-indicator {
    position: fixed;
    bottom: 2rem;
    left: 3rem;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.scroll-indicator__text {
    font-family: var(--font-body);
    font-size: 0.65rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-taupe);
}

.scroll-indicator__bar {
    width: 120px;
    height: 1px;
    background: rgba(201, 168, 76, 0.2);
    position: relative;
}

.scroll-indicator__progress {
    height: 100%;
    width: 0%;
    background: var(--color-gold-bright);
    transition: width 0.3s ease;
}

/* Gallery */
.gallery {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

.gallery__track {
    display: flex;
    flex-direction: row;
    height: 100vh;
    will-change: transform;
    transition: transform 0.05s linear;
}

/* Chamber Base */
.chamber {
    min-width: 100vw;
    width: 100vw;
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.chamber__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.chamber__content {
    position: relative;
    z-index: 2;
    max-width: 680px;
    padding: 2rem;
}

.chamber__divider {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    opacity: 0.4;
}

.divider-line {
    width: 2px;
    height: 200px;
}

.chamber__label {
    display: block;
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--color-gold-muted);
    margin-bottom: 2rem;
}

.chamber__title {
    font-family: var(--font-display);
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: 1.5rem;
    color: var(--color-cream);
}

.chamber__title em {
    font-family: var(--font-accent);
    font-weight: 300;
    font-style: italic;
    color: var(--color-gold-bright);
}

.chamber__title--hero {
    font-size: clamp(4rem, 12vw, 16rem);
}

.chamber__title--hero .title-line {
    display: block;
}

.chamber__title--hero .title-line--accent {
    font-family: var(--font-accent);
    font-weight: 300;
    font-style: italic;
    color: var(--color-gold-bright);
    font-size: 0.6em;
}

.chamber:not(.chamber--portal) .chamber__title {
    font-size: clamp(2.5rem, 6vw, 5rem);
}

.chamber__subtitle {
    font-family: var(--font-accent);
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1rem, 2vw, 1.5rem);
    color: var(--color-gold-muted);
    max-width: 400px;
}

.chamber__text {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--color-sand);
    margin-bottom: 2.5rem;
}

/* Chamber: Portal */
.chamber--portal {
    background: radial-gradient(ellipse at 30% 50%, rgba(184, 116, 26, 0.08) 0%, var(--color-obsidian) 70%);
}

.chamber--portal .chamber__content {
    max-width: none;
    padding-left: 8vw;
}

/* Wireframe Sphere */
.wireframe-sphere {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    width: clamp(300px, 40vw, 600px);
    height: clamp(300px, 40vw, 600px);
    animation: sphereRotate 30s linear infinite;
}

.sphere-ring {
    position: absolute;
    inset: 0;
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: 50%;
}

.sphere-ring--1 { transform: rotateY(0deg); }
.sphere-ring--2 { transform: rotateY(22.5deg); }
.sphere-ring--3 { transform: rotateY(45deg); }
.sphere-ring--4 { transform: rotateY(67.5deg); }
.sphere-ring--5 { transform: rotateY(90deg); }
.sphere-ring--6 { transform: rotateX(30deg); }
.sphere-ring--7 { transform: rotateX(60deg); }
.sphere-ring--8 { transform: rotateX(90deg); }

@keyframes sphereRotate {
    from { transform: translateY(-50%) rotateY(0deg) rotateX(15deg); }
    to { transform: translateY(-50%) rotateY(360deg) rotateX(15deg); }
}

/* Chamber: Dynamics */
.chamber--dynamics {
    background: radial-gradient(ellipse at 70% 40%, rgba(184, 116, 26, 0.06) 0%, var(--color-obsidian) 60%);
}

.particle-field {
    width: 100%;
    height: 100%;
    position: relative;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-gold-bright);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(201, 168, 76, 0.6);
}

.particle--1 { top: 20%; left: 15%; animation: particleFloat 8s ease-in-out infinite; }
.particle--2 { top: 35%; left: 80%; animation: particleFloat 6s ease-in-out infinite 1s; }
.particle--3 { top: 60%; left: 25%; animation: particleFloat 10s ease-in-out infinite 2s; }
.particle--4 { top: 75%; left: 65%; animation: particleFloat 7s ease-in-out infinite 0.5s; }
.particle--5 { top: 15%; left: 50%; animation: particleFloat 9s ease-in-out infinite 3s; }
.particle--6 { top: 85%; left: 40%; animation: particleFloat 11s ease-in-out infinite 1.5s; }
.particle--7 { top: 45%; left: 90%; animation: particleFloat 7.5s ease-in-out infinite 2.5s; }
.particle--8 { top: 30%; left: 10%; animation: particleFloat 8.5s ease-in-out infinite 0.8s; }
.particle--9 { top: 55%; left: 72%; animation: particleFloat 6.5s ease-in-out infinite 1.2s; }
.particle--10 { top: 80%; left: 85%; animation: particleFloat 9.5s ease-in-out infinite 3.5s; }
.particle--11 { top: 10%; left: 35%; animation: particleFloat 12s ease-in-out infinite 0.3s; }
.particle--12 { top: 65%; left: 55%; animation: particleFloat 8s ease-in-out infinite 2.8s; }

@keyframes particleFloat {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.6; }
    25% { transform: translate(15px, -20px) scale(1.3); opacity: 1; }
    50% { transform: translate(-10px, 10px) scale(0.8); opacity: 0.4; }
    75% { transform: translate(20px, 5px) scale(1.1); opacity: 0.8; }
}

/* Data Strip */
.data-strip {
    display: flex;
    gap: 3rem;
    border-top: 1px solid rgba(201, 168, 76, 0.2);
    padding-top: 2rem;
}

.data-strip__item {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.data-strip__value {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-gold-bright);
}

.data-strip__value sup {
    font-size: 0.6em;
}

.data-strip__label {
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-taupe);
}

/* Chamber: Metallurgy */
.chamber--metallurgy {
    background: radial-gradient(ellipse at 50% 60%, rgba(184, 116, 26, 0.1) 0%, var(--color-obsidian) 55%);
}

.liquid-gold {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gold-ripple {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(201, 168, 76, 0.15);
}

.gold-ripple--1 {
    width: 300px;
    height: 300px;
    animation: rippleExpand 6s ease-out infinite;
}

.gold-ripple--2 {
    width: 300px;
    height: 300px;
    animation: rippleExpand 6s ease-out infinite 2s;
}

.gold-ripple--3 {
    width: 300px;
    height: 300px;
    animation: rippleExpand 6s ease-out infinite 4s;
}

@keyframes rippleExpand {
    0% { transform: scale(0.5); opacity: 0.8; }
    100% { transform: scale(3); opacity: 0; }
}

/* Specimen Card */
.specimen-card {
    border: 1px solid rgba(201, 168, 76, 0.25);
    background: rgba(26, 17, 8, 0.8);
    max-width: 320px;
}

.specimen-card__header,
.specimen-card__footer {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gold-muted);
}

.specimen-card__header {
    border-bottom: 1px solid rgba(201, 168, 76, 0.15);
}

.specimen-card__footer {
    border-top: 1px solid rgba(201, 168, 76, 0.15);
}

.specimen-card__body {
    padding: 1.5rem 1rem;
}

.specimen-card__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

.grid-cell {
    aspect-ratio: 1;
    background: rgba(201, 168, 76, 0.05);
    border: 1px solid rgba(201, 168, 76, 0.1);
}

.grid-cell--gold {
    background: linear-gradient(135deg, var(--color-gold-primary), var(--color-gold-bright));
    border-color: var(--color-gold-bright);
    box-shadow: 0 0 12px rgba(201, 168, 76, 0.3);
}

/* Chamber: Simulation */
.chamber--simulation {
    background: var(--color-obsidian);
}

.grid-overlay {
    position: absolute;
    inset: 0;
}

.grid-line {
    position: absolute;
    background: rgba(201, 168, 76, 0.06);
}

.grid-line--h {
    width: 100%;
    height: 1px;
}

.grid-line--v {
    height: 100%;
    width: 1px;
}

.grid-line--h1 { top: 25%; }
.grid-line--h2 { top: 50%; }
.grid-line--h3 { top: 75%; }
.grid-line--v1 { left: 25%; }
.grid-line--v2 { left: 50%; }
.grid-line--v3 { left: 75%; }

.equation-block {
    background: rgba(26, 17, 8, 0.9);
    border: 1px solid rgba(201, 168, 76, 0.2);
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.equation {
    font-family: var(--font-accent);
    font-size: 1.3rem;
    font-style: italic;
    color: var(--color-gold-pale);
    margin-bottom: 0.5rem;
}

.equation sup {
    font-size: 0.7em;
}

.equation-label {
    font-family: var(--font-body);
    font-size: 0.6rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-taupe);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tech-tag {
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: 0.5rem 1rem;
    border: 1px solid rgba(201, 168, 76, 0.2);
    color: var(--color-gold-muted);
    transition: border-color 0.3s ease, color 0.3s ease;
}

.tech-tag:hover {
    border-color: var(--color-gold-bright);
    color: var(--color-gold-bright);
}

/* Chamber: Gallery */
.chamber--gallery {
    background: radial-gradient(ellipse at 40% 50%, rgba(107, 45, 26, 0.08) 0%, var(--color-obsidian) 65%);
}

.floating-frames {
    position: absolute;
    inset: 0;
}

.frame {
    position: absolute;
    border: 1px solid rgba(201, 168, 76, 0.15);
    padding: 8px;
}

.frame--1 {
    width: 200px;
    height: 280px;
    top: 10%;
    right: 15%;
    transform: rotate(-3deg);
    animation: frameFloat 12s ease-in-out infinite;
}

.frame--2 {
    width: 160px;
    height: 220px;
    top: 55%;
    right: 8%;
    transform: rotate(2deg);
    animation: frameFloat 10s ease-in-out infinite 2s;
}

.frame--3 {
    width: 240px;
    height: 180px;
    top: 30%;
    right: 35%;
    transform: rotate(-1deg);
    animation: frameFloat 14s ease-in-out infinite 4s;
}

.frame__inner {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.frame__gradient {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(184, 116, 26, 0.2), rgba(201, 168, 76, 0.05), rgba(107, 45, 26, 0.15));
}

@keyframes frameFloat {
    0%, 100% { transform: translateY(0) rotate(-3deg); }
    50% { transform: translateY(-15px) rotate(-1deg); }
}

.gallery-grid {
    display: flex;
    gap: 1.5rem;
}

.gallery-item {
    flex: 1;
}

.gallery-item__visual {
    aspect-ratio: 3/4;
    margin-bottom: 0.75rem;
    border: 1px solid rgba(201, 168, 76, 0.2);
    overflow: hidden;
}

.gallery-item--1 .gallery-item__visual {
    background: linear-gradient(180deg, rgba(184, 116, 26, 0.3) 0%, var(--color-obsidian) 100%);
}

.gallery-item--2 .gallery-item__visual {
    background: linear-gradient(135deg, rgba(201, 168, 76, 0.2) 0%, rgba(107, 45, 26, 0.3) 100%);
}

.gallery-item--3 .gallery-item__visual {
    background: radial-gradient(circle at center, rgba(245, 230, 163, 0.2), var(--color-obsidian));
}

.gallery-item__caption {
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-taupe);
}

/* Chamber: Contact */
.chamber--contact {
    background: radial-gradient(ellipse at 50% 50%, rgba(184, 116, 26, 0.08) 0%, var(--color-obsidian) 60%);
}

.radial-burst {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(201, 168, 76, 0.04) 0%, transparent 70%);
    animation: burstPulse 8s ease-in-out infinite;
}

@keyframes burstPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}

.contact-block {
    margin-bottom: 3rem;
}

.contact-link {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.2rem, 3vw, 2rem);
    color: var(--color-gold-bright);
    text-decoration: none;
    border-bottom: 1px solid rgba(201, 168, 76, 0.3);
    padding-bottom: 0.25rem;
    transition: border-color 0.3s ease;
}

.contact-link:hover {
    border-color: var(--color-gold-bright);
}

.contact-details {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-taupe);
}

.closing-mark {
    display: flex;
    align-items: baseline;
    gap: 1rem;
}

.closing-mark__symbol {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 4rem;
    color: var(--color-gold-bright);
    opacity: 0.15;
}

.closing-mark__year {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    color: var(--color-taupe);
}

/* Reveal Animations */
.chamber__content > * {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.chamber.is-active .chamber__content > *:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0.1s; }
.chamber.is-active .chamber__content > *:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 0.25s; }
.chamber.is-active .chamber__content > *:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 0.4s; }
.chamber.is-active .chamber__content > *:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 0.55s; }
.chamber.is-active .chamber__content > *:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 0.7s; }
.chamber.is-active .chamber__content > *:nth-child(6) { opacity: 1; transform: translateY(0); transition-delay: 0.85s; }

/* Responsive */
@media (max-width: 768px) {
    .nav {
        padding: 1.5rem 1.5rem;
    }

    .chamber__content {
        max-width: 100%;
        padding: 1.5rem;
    }

    .chamber--portal .chamber__content {
        padding-left: 1.5rem;
    }

    .chamber__title--hero {
        font-size: clamp(2.5rem, 10vw, 5rem);
    }

    .wireframe-sphere {
        width: 200px;
        height: 200px;
        right: -5%;
        opacity: 0.3;
    }

    .data-strip {
        flex-direction: column;
        gap: 1.5rem;
    }

    .gallery-grid {
        flex-direction: column;
    }

    .scroll-indicator {
        left: 1.5rem;
    }

    .floating-frames {
        opacity: 0.3;
    }

    .frame--1 { width: 120px; height: 160px; }
    .frame--2 { width: 100px; height: 140px; }
    .frame--3 { width: 140px; height: 100px; }
}

@media (max-width: 480px) {
    .nav__logo {
        font-size: 0.65rem;
    }

    .chamber__title--hero {
        font-size: clamp(2rem, 8vw, 3.5rem);
    }

    .chamber:not(.chamber--portal) .chamber__title {
        font-size: clamp(1.8rem, 5vw, 3rem);
    }

    .tech-stack {
        gap: 0.5rem;
    }

    .tech-tag {
        font-size: 0.55rem;
        padding: 0.4rem 0.6rem;
    }
}