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

:root {
    /* Dark Futuristic Theme Color Palette */
    --bg-dark: #0a0e27;
    --bg-darker: #060913;
    --surface-dark: #141829;
    --surface-elevated: #1a1f3a;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --neon-cyan: #00f5ff;
    --neon-blue: #0ea5e9;
    --neon-purple: #a855f7;
    --neon-pink: #ec4899;
    --neon-green: #10b981;
    --glow-cyan: rgba(0, 245, 255, 0.5);
    --glow-blue: rgba(14, 165, 233, 0.5);
    --glow-purple: rgba(168, 85, 247, 0.5);
    --gradient-neon: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-blue) 50%, var(--neon-purple) 100%);

    /* Design Tokens */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;

    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
    --text-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
    --text-3xl: clamp(2rem, 1.6rem + 2vw, 2.5rem);
    --text-4xl: clamp(2.5rem, 2rem + 2.5vw, 3.5rem);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: radial-gradient(ellipse at top, var(--bg-dark) 0%, var(--bg-darker) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Animated background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 80%, var(--glow-cyan) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--glow-purple) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, var(--glow-blue) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    animation: ambientPulse 8s ease-in-out infinite;
}

@keyframes ambientPulse {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.05);
    }
}

/* Scanline effect */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(0deg,
            rgba(0, 245, 255, 0.03) 0px,
            transparent 2px,
            transparent 4px);
    pointer-events: none;
    z-index: 0;
    animation: scanlineMove 8s linear infinite;
}

@keyframes scanlineMove {
    0% {
        transform: translateY(0);
    }

    100% {
        transform: translateY(20px);
    }
}

/* Decorative 3D grid pattern */
.grid-pattern {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 245, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
    opacity: 0.3;
}

/* Fixed Navigation */
.navigation {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(20, 24, 41, 0.7);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    padding: 1.2rem 2rem;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 245, 255, 0.2);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 245, 255, 0.1);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--neon-cyan);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    text-shadow: 0 0 20px var(--glow-cyan);
}

.nav-name::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-neon);
    transition: width 0.3s ease;
    box-shadow: 0 0 10px var(--glow-cyan);
}

.nav-name:hover {
    color: var(--neon-purple);
    text-shadow: 0 0 30px var(--glow-purple);
    transform: translateY(-1px);
}

.nav-name:hover::after {
    width: 100%;
}

.breadcrumb {
    display: flex;
    gap: 0.5rem;
    list-style: none;
    font-size: 0.95rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb li:not(:last-child)::after {
    content: '→';
    color: var(--neon-cyan);
    opacity: 0.5;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-md);
}

.breadcrumb a:hover {
    background: rgba(0, 245, 255, 0.1);
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--glow-cyan);
}

.breadcrumb span {
    color: var(--text-primary);
    opacity: 0.7;
    padding: 0.3rem 0.8rem;
}

/* Main Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-4xl) var(--space-xl);
    position: relative;
    z-index: 1;
    margin-top: 5rem;
}

/* Header Section */
.model-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.model-title {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
    background: var(--gradient-neon);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleShimmer 8s ease-in-out infinite;
    background-size: 200% 200%;
    filter: drop-shadow(0 0 30px var(--glow-cyan));
}

@keyframes titleShimmer {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.model-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    font-weight: 500;
    max-width: 600px;
    margin: 0 auto;
}

/* Model Viewer Container */
.viewer-container {
    background: rgba(20, 24, 41, 0.4);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--radius-2xl);
    padding: var(--space-sm);
    box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.6),
        0 0 60px var(--glow-cyan),
        inset 0 0 0 1px rgba(0, 245, 255, 0.3);
    margin-bottom: var(--space-2xl);
    position: relative;
    overflow: visible;
}

.viewer-container::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-neon);
    border-radius: var(--radius-2xl);
    z-index: -1;
    opacity: 0.6;
    animation: borderPulse 3s ease-in-out infinite;
}

@keyframes borderPulse {

    0%,
    100% {
        opacity: 0.6;
        filter: blur(8px);
    }

    50% {
        opacity: 1;
        filter: blur(12px);
    }
}

.viewer-container::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg,
            transparent 0deg,
            rgba(0, 245, 255, 0.1) 90deg,
            transparent 180deg,
            rgba(168, 85, 247, 0.1) 270deg,
            transparent 360deg);
    animation: holographicSpin 8s linear infinite;
    pointer-events: none;
    border-radius: var(--radius-2xl);
}

@keyframes holographicSpin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Model Viewer Styling */
model-viewer {
    width: 100%;
    height: 80vh;
    min-height: 700px;
    background: transparent;
    border-radius: var(--radius-xl);
    display: block;
    --progress-bar-color: var(--neon-cyan);
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--neon-cyan);
    text-decoration: none;
    font-size: var(--text-base);
    font-weight: 600;
    padding: var(--space-md) var(--space-xl);
    background: rgba(20, 24, 41, 0.6);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 20px var(--glow-cyan);
    border: 1px solid rgba(0, 245, 255, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.back-link::before {
    content: '←';
    font-size: 1.2em;
    transition: transform 0.3s ease;
}

.back-link::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-neon);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.back-link:hover {
    color: white;
    border-color: transparent;
    transform: translateX(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6), 0 0 40px var(--glow-purple);
    text-shadow: 0 0 10px white;
}

.back-link:hover::before {
    transform: translateX(-4px);
}

.back-link:hover::after {
    opacity: 1;
}

.back-link span {
    position: relative;
    z-index: 1;
}

/* Corner accents */
.viewer-container .corner-accent {
    position: absolute;
    width: 40px;
    height: 40px;
    border: 2px solid;
    border-color: transparent;
    z-index: 10;
}

.corner-accent-tl {
    top: 10px;
    left: 10px;
    border-top-color: var(--neon-cyan);
    border-left-color: var(--neon-cyan);
    border-radius: var(--radius-sm) 0 0 0;
    box-shadow: 0 0 15px var(--glow-cyan);
}

.corner-accent-tr {
    top: 10px;
    right: 10px;
    border-top-color: var(--neon-blue);
    border-right-color: var(--neon-blue);
    border-radius: 0 var(--radius-sm) 0 0;
    box-shadow: 0 0 15px var(--glow-blue);
}

.corner-accent-bl {
    bottom: 10px;
    left: 10px;
    border-bottom-color: var(--neon-purple);
    border-left-color: var(--neon-purple);
    border-radius: 0 0 0 var(--radius-sm);
    box-shadow: 0 0 15px var(--glow-purple);
}

.corner-accent-br {
    bottom: 10px;
    right: 10px;
    border-bottom-color: var(--neon-pink);
    border-right-color: var(--neon-pink);
    border-radius: 0 0 var(--radius-sm) 0;
    box-shadow: 0 0 15px rgba(236, 72, 153, 0.5);
}

.corner-accent {
    animation: cornerPulse 3s ease-in-out infinite;
}

.corner-accent-tr {
    animation-delay: 0.5s;
}

.corner-accent-bl {
    animation-delay: 1s;
}

.corner-accent-br {
    animation-delay: 1.5s;
}

@keyframes cornerPulse {

    0%,
    100% {
        opacity: 0.6;
        transform: scale(1);
    }

    50% {
        opacity: 1;
        transform: scale(1.1);
    }
}

/* Floating Elements */
.floating-shape {
    position: fixed;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--glow-cyan) 0%, transparent 70%);
    border-radius: 63% 37% 54% 46% / 45% 62% 38% 55%;
    top: -10%;
    right: -5%;
    animation: morphFloat 12s ease-in-out infinite;
    filter: blur(60px);
}

.shape-2 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, var(--glow-purple) 0%, transparent 70%);
    border-radius: 37% 63% 46% 54% / 62% 45% 55% 38%;
    bottom: -10%;
    left: -5%;
    animation: morphFloat 15s ease-in-out infinite reverse;
    filter: blur(60px);
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--glow-blue) 0%, transparent 70%);
    border-radius: 45% 55% 60% 40% / 55% 45% 55% 45%;
    top: 50%;
    right: 20%;
    animation: morphFloat 10s ease-in-out infinite;
    filter: blur(50px);
}

/* Particle system */
.particle {
    position: fixed;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, var(--neon-cyan), transparent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
    box-shadow: 0 0 10px var(--glow-cyan);
}

.particle-1 {
    top: 20%;
    left: 10%;
    animation: particleFloat 20s ease-in-out infinite;
}

.particle-2 {
    top: 60%;
    right: 15%;
    animation: particleFloat 25s ease-in-out infinite 2s;
    background: radial-gradient(circle, var(--neon-purple), transparent);
    box-shadow: 0 0 10px var(--glow-purple);
}

.particle-3 {
    bottom: 30%;
    left: 20%;
    animation: particleFloat 18s ease-in-out infinite 4s;
    background: radial-gradient(circle, var(--neon-blue), transparent);
    box-shadow: 0 0 10px var(--glow-blue);
}

.particle-4 {
    top: 40%;
    right: 30%;
    animation: particleFloat 22s ease-in-out infinite 6s;
    background: radial-gradient(circle, var(--neon-pink), transparent);
    box-shadow: 0 0 10px rgba(236, 72, 153, 0.5);
}

.particle-5 {
    bottom: 50%;
    left: 40%;
    animation: particleFloat 24s ease-in-out infinite 8s;
    background: radial-gradient(circle, var(--neon-green), transparent);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
}

@keyframes particleFloat {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.4;
    }

    25% {
        transform: translate(50px, -80px) scale(1.5);
        opacity: 1;
    }

    50% {
        transform: translate(-30px, -150px) scale(1);
        opacity: 0.5;
    }

    75% {
        transform: translate(80px, -100px) scale(1.2);
        opacity: 0.8;
    }
}

/* Light beams */
.light-beam {
    position: fixed;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom,
            transparent 0%,
            var(--glow-cyan) 50%,
            transparent 100%);
    pointer-events: none;
    z-index: 0;
    opacity: 0.3;
}

.beam-1 {
    left: 15%;
    animation: beamPulse 4s ease-in-out infinite;
}

.beam-2 {
    left: 50%;
    animation: beamPulse 5s ease-in-out infinite 1s;
    background: linear-gradient(to bottom,
            transparent 0%,
            var(--glow-blue) 50%,
            transparent 100%);
}

.beam-3 {
    right: 20%;
    animation: beamPulse 6s ease-in-out infinite 2s;
    background: linear-gradient(to bottom,
            transparent 0%,
            var(--glow-purple) 50%,
            transparent 100%);
}

@keyframes beamPulse {

    0%,
    100% {
        opacity: 0.2;
        transform: scaleY(1);
    }

    50% {
        opacity: 0.5;
        transform: scaleY(1.1);
    }
}

@keyframes morphFloat {

    0%,
    100% {
        border-radius: 63% 37% 54% 46% / 45% 62% 38% 55%;
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(20px, -20px) rotate(5deg);
    }

    50% {
        border-radius: 37% 63% 46% 54% / 62% 45% 55% 38%;
        transform: translate(0, 20px) rotate(-5deg);
    }

    75% {
        transform: translate(-20px, 0) rotate(3deg);
    }
}

/* Footer Styling */
.footer {
    position: relative;
    z-index: 1;
    margin-top: var(--space-4xl);
    padding: var(--space-2xl) var(--space-xl);
    background: rgba(20, 24, 41, 0.6);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border-top: 1px solid rgba(0, 245, 255, 0.2);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 245, 255, 0.05);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-neon);
    opacity: 0.6;
    animation: footerBorderPulse 3s ease-in-out infinite;
}

@keyframes footerBorderPulse {

    0%,
    100% {
        opacity: 0.4;
    }

    50% {
        opacity: 0.8;
    }
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.copyright {
    font-size: var(--text-base);
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.01em;
}

.copyright a {
    color: var(--neon-cyan);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    position: relative;
}

.copyright a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 245, 255, 0.1);
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.copyright a:hover {
    color: var(--neon-blue);
    text-shadow: 0 0 15px var(--glow-cyan);
}

.copyright a:hover::before {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-content {
        flex-direction: column;
        gap: var(--space-md);
        align-items: flex-start;
    }

    .breadcrumb {
        flex-wrap: wrap;
    }

    .container {
        padding: var(--space-2xl) var(--space-md);
    }

    model-viewer {
        height: 70vh;
        min-height: 500px;
    }

    .footer {
        padding: var(--space-xl) var(--space-md);
    }

    .copyright {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .navigation {
        padding: var(--space-md);
    }

    model-viewer {
        height: 60vh;
        min-height: 400px;
    }

    .viewer-container {
        padding: var(--space-xs);
    }

    .model-title {
        font-size: var(--text-3xl);
    }
}

/* Accessibility: Reduced motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
a:focus,
a:focus-visible {
    outline: 3px solid var(--neon-cyan);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}