:root {
    /* Core System Colors for Artificial Acumen */
    --bg-deep: #050B16;
    --bg-main: #0B1F3A;
    --sys-blue: #1F4E8C;
    --high-blue: #4FA3FF;
    
    /* Decision/Focus Accent */
    --accent: #F2A900;
    --accent-light: #FFD166;
    
    /* Technical White Text */
    --text-main: #E6EEF8;
    --text-muted: rgba(230, 238, 248, 0.65);
    
    /* Derived Glass/Grid Utilities */
    --grid-color: rgba(31, 78, 140, 0.25);
    --glass-bg: rgba(11, 31, 58, 0.6);
    --glass-border: rgba(79, 163, 255, 0.15);
    
    /* Typography */
    --font-heading: 'Raleway', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Blueprint Background Grid */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-size: 50px 50px;
    background-image: 
        linear-gradient(to right, var(--grid-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
    z-index: -2;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 30%, rgba(0,0,0,0) 100%);
    -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 30%, rgba(0,0,0,0) 100%);
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.text-gradient {
    background: linear-gradient(to right, var(--high-blue), var(--sys-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.mt-4 { margin-top: 2rem; }

/* Header & Nav */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 100;
    transition: var(--transition);
    background: transparent;
}

.header.scrolled {
    background: rgba(5, 11, 22, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 60px;
    object-fit: contain;
    transition: var(--transition);
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav a {
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover:not(.btn) {
    color: var(--primary-light);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-deep);
    box-shadow: 0 4px 15px rgba(242, 169, 0, 0.2);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(242, 169, 0, 0.3);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background: rgba(230, 238, 248, 0.1);
    transform: translateY(-2px);
}

.btn-outline {
    border: 1px solid var(--sys-blue);
    color: var(--text-main);
}

.btn-outline:hover {
    background: rgba(31, 78, 140, 0.2);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px; 
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero-text {
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(31, 78, 140, 0.15);
    border: 1px solid var(--sys-blue);
    border-radius: 50px;
    color: var(--high-blue);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 300;
    font-style: italic;
    letter-spacing: 0.03em;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 650px;
    margin-inline: auto;
}

.cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Features & Cases */
.features, .cases {
    padding: 8rem 2rem;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 400;
}

.section-title p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2.5rem;
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-8px);
    border-color: var(--sys-blue);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    background: rgba(31, 78, 140, 0.1);
}

.glass-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--high-blue), var(--sys-blue));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.glass-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.glass-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Bottom CTA Banner */
.cta-bottom {
    padding-bottom: 8rem;
}

.glass-banner {
    background: linear-gradient(135deg, var(--glass-bg), var(--bg-deep));
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 4rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.glass-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(79,163,255,0.05) 0%, transparent 60%);
    z-index: 0;
}

.glass-banner * {
    position: relative;
    z-index: 1;
}

.glass-banner h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 400;
}

.glass-banner p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* Contact Section */
.contact-section {
    padding: 0 2rem 8rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-text h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.contact-text p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 500px;
}

.contact-form-wrapper {
    padding: 3rem;
    position: relative;
    overflow: hidden;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    background: rgba(5, 11, 22, 0.5); /* bg-deep */
    border: 1px solid var(--sys-blue);
    border-radius: 8px;
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--high-blue);
    background: rgba(5, 11, 22, 0.8);
    box-shadow: 0 0 0 3px rgba(79, 163, 255, 0.15);
}

.submit-btn {
    width: 100%;
    margin-top: 1rem;
}

.form-success {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 3rem;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.form-success.active {
    opacity: 1;
    visibility: visible;
}

.form-success .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: none;
    -webkit-text-fill-color: initial;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .contact-section {
        padding: 0 1rem 4rem;
    }
    .contact-form-wrapper {
        padding: 2rem 1.5rem;
    }
}

/* Footer */
.footer {
    border-top: 1px solid var(--glass-border);
    padding: 4rem 0 2rem;
    background: rgba(5, 11, 22, 0.9);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    height: 35px;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 250px;
}

.footer h4 {
    font-family: var(--font-heading);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a, .footer-social a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-links a:hover, .footer-social a:hover {
    color: var(--primary-light);
}

.footer-social {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Animations Triggered by JS */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .glass-card {
        padding: 2rem;
    }
    
    .cta-group {
        flex-direction: column;
        width: 100%;
    }
    
    .cta-group .btn {
        width: 100%;
    }
}