:root {
    --bg-stealth-black: #F5F7FA;
    --matte-black: #FFFFFF;
    --accent-chrome: #8B95A5;
    --accent-cyan: #0096C7; /* Darker cyan for text contrast */
    --cyan-glow: rgba(0, 150, 199, 0.2);
    --chrome-glow: rgba(139, 149, 165, 0.1);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --text-primary: #1F2937;
    --text-secondary: #4B5563;
    --text-muted: #6B7280;
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 1);
    
    --z-back: -1;
    --z-bg: 0;
    --z-content: 10;
    --z-nav: 100;
    --z-logo: 50;
}

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

body, html {
    width: 100%;
    font-family: var(--font-body);
    background-color: var(--bg-stealth-black);
    color: var(--text-primary);
    overflow-x: hidden;
    scroll-behavior: smooth;
    transition: background-color 0.5s ease;
}

/* Background Parallax */
.bg-parallax {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: var(--z-bg);
    display: flex;
    pointer-events: none;
}

.bg-blueprint, .bg-neural {
    flex: 1;
    height: 100%;
    opacity: 0.25; /* Slightly higher for light theme visibility */
    background-size: cover;
    background-position: center;
    transition: transform 0.1s ease-out;
}

.bg-blueprint {
    background-image: radial-gradient(var(--accent-chrome) 1px, transparent 1px),
    radial-gradient(var(--accent-chrome) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: 0 0, 20px 20px;
}

.bg-neural {
    background-image: radial-gradient(var(--accent-cyan) 2px, transparent 2px);
    background-size: 60px 60px;
    background-position: 0 0;
    position: relative;
}
.bg-neural::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(45deg, transparent 48%, var(--accent-cyan) 49%, var(--accent-cyan) 51%, transparent 52%);
    background-size: 60px 60px;
    opacity: 0.1;
}

/* Typography & Utilities */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
}

.chrome-text {
    color: var(--accent-chrome);
}

.cyan-text {
    color: var(--accent-cyan);
}

/* Navigation */
.floating-nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1200px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    border-radius: 50px;
    z-index: var(--z-nav);
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 30px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo-img {
    height: 40px;
    width: auto;
}

.nav-logo-text {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: 2px;
    background: linear-gradient(90deg, var(--text-primary), var(--accent-chrome));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent-cyan);
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow: hidden;
    z-index: var(--z-content);
    padding-top: 100px;
}

.hero-text-overlay {
    text-align: center;
    z-index: 60;
    width: 90%;
    max-width: 900px;
    margin-top: 40px;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease-out;
}

.main-headline {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    font-weight: 800;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.core-logic-box {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(0, 150, 199, 0.2);
    padding: 20px 30px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    font-size: 1.05rem;
    color: var(--text-secondary);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    display: inline-block;
}

.core-logic-box strong {
    color: var(--accent-cyan);
    font-weight: 600;
    margin-right: 5px;
}

@keyframes fadeInDown {
    0% { opacity: 0; transform: translateY(-20px); }
    100% { opacity: 1; transform: translateY(0); }
}

.hero-duality {
    flex: 1;
    display: flex;
    width: 100%;
    position: relative;
    align-items: center;
    justify-content: center;
}

.hero-side {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 0 5%;
    position: relative;
    height: 100%;
}

.mechanical-side {
    justify-content: flex-end;
    background: linear-gradient(90deg, transparent, rgba(139,149,165,0.05) 100%);
}

.intelligence-side {
    justify-content: flex-start;
    background: linear-gradient(-90deg, transparent, rgba(0,150,199,0.05) 100%);
}

/* 3D Render Placeholders */
.three-d-placeholder {
    position: absolute;
    opacity: 0.8;
    z-index: 1;
    pointer-events: none;
    transition: transform 0.1s ease-out;
}

/* Continuous Float Animation */
@keyframes continuousFloat {
    0% { transform: translateY(-50%) translateX(0px); }
    50% { transform: translateY(-55%) translateX(10px) rotate(3deg); }
    100% { transform: translateY(-50%) translateX(0px); }
}

.mechanical-model { left: 15%; top: 50%; transform: translateY(-50%); }

.digital-model { right: 10%; top: 50%; transform: translateY(-50%); }

.parallax-icon { font-size: 8rem !important; opacity: 1 !important; }
.mechanical-icon { color: var(--accent-chrome); }

.digital-model-img {
    width: 300px;
    height: auto;
    filter: saturate(0.6) brightness(0.9) drop-shadow(0 0 20px rgba(0, 150, 199, 0.2));
    object-fit: contain;
}

/* Center Logo Animation */
.hero-center-logo {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    z-index: var(--z-logo);
}

.lens-flare {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 10px;
    background: radial-gradient(ellipse at center, rgba(255,255,255,0.8) 0%, rgba(0, 150, 199, 0.3) 50%, transparent 70%);
    box-shadow: 0 0 30px 10px rgba(0, 150, 199, 0.1);
    z-index: 0;
    animation: flarePulse 4s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes flarePulse {
    0% { transform: translate(-50%, -50%) scaleX(0.8); opacity: 0.3; }
    100% { transform: translate(-50%, -50%) scaleX(1.1); opacity: 0.6; }
}

.logo-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-pedestal {
    width: 230px;
    height: 230px;
    z-index: 2;
    position: relative;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    border: 1px solid rgba(0, 150, 199, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05), inset 0 0 10px rgba(0, 150, 199, 0.1);
    backdrop-filter: blur(12px);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 25px;
}

.center-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* Soften drop shadow for light theme */
    filter: drop-shadow(0 4px 10px rgba(0,0,0,0.1));
}

.logo-aura {
    position: absolute;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    z-index: 1;
    background: conic-gradient(from 180deg, rgba(139, 149, 165, 0.1) 0deg 180deg, rgba(0, 150, 199, 0.1) 180deg 360deg);
    animation: rotateAura 20s linear infinite;
}

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

/* Features Section */
.features-section {
    padding: 80px 20px;
    position: relative;
    z-index: var(--z-content);
    background: linear-gradient(to bottom, transparent, var(--matte-black), transparent);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 80px;
    position: relative;
    color: var(--text-primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-chrome), var(--accent-cyan));
}

.features-grid {
    display: flex;
    gap: 40px;
}

.feature-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
    position: relative;
}

.floating-header {
    text-align: center;
    margin-bottom: 10px;
    font-size: 1.8rem;
    font-family: var(--font-heading);
}

.floating-header h3 {
    display: inline-block;
    padding-bottom: 10px;
    border-bottom: 1px dashed rgba(0,0,0,0.1);
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid rgba(0,0,0,0.05);
    border-radius: 20px;
    padding: 35px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.02);
}

.mechanical-card { border-left: 3px solid var(--accent-chrome); }
.mechanical-card:hover { transform: translateY(-5px); box-shadow: -10px 10px 30px rgba(139, 149, 165, 0.15); }

.digital-card { border-right: 3px solid var(--accent-cyan); text-align: right; }
.digital-card:hover { transform: translateY(-5px); box-shadow: 10px 10px 30px rgba(0, 150, 199, 0.15); }
.digital-card .card-icon { color: var(--accent-cyan); left: auto; right: 35px; }

.card-icon { font-size: 2rem; color: var(--accent-chrome); margin-bottom: 20px; }

.feature-card h3 { font-size: 1.4rem; margin-bottom: 10px; color: var(--text-primary); }
.feature-card p { color: var(--text-muted); line-height: 1.6; font-size: 0.95rem; }

/* Micro-interaction: Modular Design Detach */
.interactive-model {
    position: absolute; right: 20px; top: 20px; width: 60px; height: 60px;
    opacity: 0.2; transition: all 0.5s ease;
}

.model-part { position: absolute; background: var(--accent-chrome); border-radius: 4px; transition: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55); }
.base { width: 40px; height: 10px; bottom: 0; left: 10px; }
.arm { width: 10px; height: 30px; bottom: 10px; left: 25px; }
.effector { width: 20px; height: 10px; bottom: 40px; left: 20px; }

#modular-design:hover .interactive-model { opacity: 0.8; }
#modular-design:hover .base { transform: translateY(10px) rotate(-10deg); }
#modular-design:hover .arm { transform: translateY(-10px) translateX(-15px) rotate(45deg); background: var(--accent-cyan); }
#modular-design:hover .effector { transform: translateY(-25px) translateX(15px) rotate(-30deg); }

/* Custom Icon Animations */
.mechanical-card .card-icon i, .digital-card .card-icon i {
    display: inline-block; /* Ensure transforms work */
}

.mechanical-card:hover .fa-arrows-to-dot {
    animation: shrinkOnce 0.4s ease forwards;
}
@keyframes shrinkOnce {
    0% { transform: scale(1); }
    50% { transform: scale(0.6); }
    100% { transform: scale(1); }
}

.digital-card:hover .fa-eye {
    animation: blinkOnce 0.4s ease forwards;
}
@keyframes blinkOnce {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.1); }
}

.digital-card:hover .fa-wifi {
    animation: wifiLevelUp 1s ease forwards;
}
@keyframes wifiLevelUp {
    0% { clip-path: inset(100% 0 0 0); opacity: 0.5; }
    100% { clip-path: inset(0 0 0 0); opacity: 1; }
}

.mechanical-card:hover .fa-shield-halved {
    animation: shieldColorSwitch 0.8s ease forwards;
}
@keyframes shieldColorSwitch {
    0%, 100% { color: var(--accent-chrome); }
    50% { color: var(--accent-cyan); }
}

.digital-card:hover .fa-stethoscope {
    animation: stethHeartbeat 0.8s ease forwards;
}
@keyframes stethHeartbeat {
    0%, 100% { transform: scale(1); }
    25%, 75% { transform: scale(1.2); }
    50% { transform: scale(0.9); }
}

/* Performance IQ Section */
.performance-section {
    padding: 100px 20px;
    position: relative;
    z-index: var(--z-content);
}

/* Metrics Row */
.metrics-row {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    max-width: 1100px;
    margin: 0 auto;
}

.metric {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(0,0,0,0.05);
    padding: 40px 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    min-width: 240px;
    max-width: 320px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.metric:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 150, 199, 0.12);
}

.metric-value { font-size: 2.8rem; font-weight: 800; margin-bottom: 8px; }
.metric-label { font-size: 0.9rem; color: var(--text-primary); text-transform: uppercase; letter-spacing: 1px; font-weight: 600; margin-bottom: 8px; text-align: center; }
.metric-desc { font-size: 0.8rem; color: var(--text-muted); text-align: center; line-height: 1.5; }

/* Applications Use Case Grid Section */
.applications-section {
    padding: 100px 20px 150px;
    background: radial-gradient(circle at center, rgba(0,150,199,0.05) 0%, transparent 70%);
}

.use-cases-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 50px;
    flex-wrap: wrap;
}

.use-case-card {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(0,0,0,0.05);
    border-top: 2px solid var(--accent-cyan);
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    width: 300px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
    animation: floatBob 6s ease-in-out infinite;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s;
    cursor: default;
}

.use-case-card:hover {
    transform: translateY(-15px) scale(1.05) !important;
    box-shadow: 0 20px 40px rgba(0, 150, 199, 0.15);
}

.use-case-icon {
    font-size: 3rem;
    color: var(--accent-chrome);
    margin-bottom: 20px;
    transition: color 0.3s;
}

.use-case-card:hover .use-case-icon {
    color: var(--accent-cyan);
}

.use-case-card h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.use-case-card p {
    color: var(--text-muted);
    line-height: 1.5;
    font-size: 0.95rem;
}

.hover-scanline {
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 50px;
    background: linear-gradient(to bottom, transparent, rgba(0, 150, 199, 0.1), transparent);
    transition: top 0.6s ease;
}

.use-case-card:hover .hover-scanline {
    top: 150%;
}

.card-delay-1 { animation-delay: 0s; }
.card-delay-2 { animation-delay: 2s; }
.card-delay-3 { animation-delay: 4s; }

@keyframes floatBob {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

@keyframes pulseNodes {
    0% { opacity: 0.5; filter: blur(1px); }
    100% { opacity: 1; filter: blur(0px); }
}

@keyframes heartbeat {
    0% { transform: translate(-50%, -50%) scale(1); }
    15% { transform: translate(-50%, -50%) scale(1.2); }
    30% { transform: translate(-50%, -50%) scale(1); }
    45% { transform: translate(-50%, -50%) scale(1.2); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

/* Contact Section */
.contact-section {
    padding: 80px 20px 0;
    position: relative;
    z-index: var(--z-content);
}

.contact-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    max-width: 1100px;
    margin: 0 auto;
}

.contact-card {
    background: var(--glass-bg);
    border: 1px solid rgba(0,0,0,0.05);
    padding: 40px 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    min-width: 280px;
    max-width: 350px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.contact-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 150, 199, 0.12);
    border-color: rgba(0, 150, 199, 0.3);
}

.contact-icon {
    font-size: 2.5rem;
    color: var(--accent-cyan);
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.contact-card:hover .contact-icon {
    transform: scale(1.1);
}

.contact-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-card p, .contact-card a {
    color: var(--text-muted);
    font-size: 1rem;
    text-decoration: none;
    transition: color 0.3s;
}

.contact-card a:hover {
    color: var(--accent-cyan);
}

/* Footer */
/* Footer & Forge Branding */
.main-footer {
    padding: 0 20px 60px;
    background: linear-gradient(to bottom, transparent, rgba(245, 247, 250, 0.95));
    border-top: 1px solid rgba(0, 0, 0, 0.03);
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: var(--z-content);
}

.footer-branding {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.accelerated-text {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 500;
    opacity: 0.8;
}

.forge-logo-wrapper {
    max-width: 220px;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.forge-logo-img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 5px 15px rgba(0,0,0,0.05));
    transition: all 0.4s ease;
}

.footer-branding:hover .forge-logo-wrapper {
    transform: scale(1.05);
}

.footer-branding:hover .forge-logo-img {
    filter: drop-shadow(0 10px 25px rgba(0,0,0,0.1));
}

/* Responsive Design */
@media (max-width: 900px) {
    .main-headline { font-size: 2.5rem; }
    .features-grid { flex-direction: column; }
    .hero-duality { flex-direction: column; display: none; }
    .three-d-placeholder { display: none; }
    
    .metrics-row { flex-direction: column; align-items: center; gap: 20px; }
    .metric { max-width: 100%; width: 100%; }
    
    .use-cases-grid { flex-direction: column; align-items: center; }

    .main-footer { padding: 60px 20px; }
}