:root {
    /* Color Palette */
    --bg-color: #050505;
    --bg-surface: #0f1115;
    --bg-surface-lighter: #1a1d24;
    --accent-color: #00e5ff; /* Electric Blue/Cyan */
    --accent-glow: rgba(0, 229, 255, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #a0aab2;
    --border-color: rgba(255, 255, 255, 0.08);

    /* Typography */
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing & Transitions */
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-slow: all 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.section {
    padding: 100px 0;
}

.bg-darker {
    background-color: #020202;
}

.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }
.mb-0 { margin-bottom: 0; }
.mx-auto { margin-left: auto; margin-right: auto; }
.text-center { text-align: center; }

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #000;
    border: 1px solid var(--accent-color);
    box-shadow: 0 0 15px var(--accent-glow);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent-color);
    box-shadow: 0 0 25px var(--accent-glow);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    box-shadow: inset 0 0 10px var(--accent-glow);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    background-color: rgba(5, 5, 5, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: 2px;
}

.logo span {
    color: var(--accent-color);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--accent-color);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../assets/hero_bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(5,5,5,0.9) 0%, rgba(5,5,5,0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-text-content {
    max-width: 600px;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0.7;
    animation: bounce 2s infinite;
}

.scroll-indicator p {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.mouse {
    width: 24px;
    height: 36px;
    border: 2px solid var(--text-primary);
    border-radius: 12px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 6px;
    background-color: var(--text-primary);
    border-radius: 2px;
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% { transform: translate(-50%, 0); opacity: 1; }
    100% { transform: translate(-50%, 10px); opacity: 0; }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-10px) translateX(-50%); }
    60% { transform: translateY(-5px) translateX(-50%); }
}

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

.problem-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.problem-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    transform: scaleX(0);
    transition: var(--transition-slow);
}

.problem-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    background-color: var(--bg-surface-lighter);
}

.problem-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.problem-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

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

/* Solution Section */
.container-split {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.split-image {
    flex: 1;
    position: relative;
}

.split-image img {
    width: 100%;
    border-radius: 8px;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 0 20px rgba(0, 0, 0, 0.8));
}

.image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    z-index: 1;
    filter: blur(40px);
}

.split-content {
    flex: 1;
}

.split-content .section-title {
    text-align: left;
}

.split-content .section-subtitle {
    text-align: left;
    margin-left: 0;
}

.highlight-list {
    list-style: none;
    margin-top: 2rem;
}

.highlight-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.highlight-list i {
    color: var(--accent-color);
    font-size: 1.25rem;
    margin-top: 2px;
}

.highlight-list span {
    color: var(--text-secondary);
}

.highlight-list strong {
    color: var(--text-primary);
}

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

.tech-card {
    position: relative;
    padding: 3rem 2rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    z-index: 1;
    overflow: hidden;
    transition: var(--transition);
}

.tech-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(0, 229, 255, 0.1), transparent 50%);
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.tech-card:hover {
    border-color: rgba(0, 229, 255, 0.3);
}

.tech-card:hover .tech-card-bg {
    opacity: 1;
}

.tech-icon {
    font-size: 3rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.tech-card:hover .tech-icon {
    color: var(--accent-color);
    transform: scale(1.1);
}

/* Vision Section */
.vision-container {
    text-align: center;
    max-width: 800px;
    padding: 4rem;
    background: linear-gradient(135deg, var(--bg-surface) 0%, #050505 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.vision-icon {
    font-size: 4rem;
    color: var(--accent-color);
    opacity: 0.8;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.vision-text {
    font-size: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 1.5rem;
    font-style: italic;
}

/* Status Section */
.badge {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(0, 229, 255, 0.1);
    color: var(--accent-color);
    border: 1px solid rgba(0, 229, 255, 0.2);
    border-radius: 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-family: var(--font-heading);
    letter-spacing: 1px;
}

.timeline {
    position: relative;
    display: flex;
    justify-content: space-between;
    max-width: 800px;
    margin: 3rem auto 0;
    padding-top: 2rem;
}

.timeline-track {
    position: absolute;
    top: 2rem;
    left: 5%;
    width: 90%;
    height: 2px;
    background-color: var(--border-color);
    z-index: 1;
}

.timeline-track::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 50%; /* Reflects progress */
    height: 100%;
    background-color: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-glow);
}

.timeline-step {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    width: 20%;
}

.step-dot {
    width: 16px;
    height: 16px;
    background-color: var(--bg-surface);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    transition: var(--transition);
}

.timeline-step span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-family: var(--font-heading);
}

.timeline-step.completed .step-dot {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 0 15px var(--accent-glow);
}

.timeline-step.completed span {
    color: var(--text-primary);
}

.timeline-step.active .step-dot {
    border-color: var(--accent-color);
    background-color: var(--bg-surface);
    box-shadow: 0 0 15px var(--accent-glow);
    animation: pulse 2s infinite;
}

.timeline-step.active span {
    color: var(--accent-color);
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(0, 229, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0); }
}

/* CTA Section */
.cta {
    position: relative;
    padding: 120px 0;
    overflow: hidden;
}

.cta-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../assets/hero_bg.png'); /* Reused image, but darkened */
    background-size: cover;
    background-position: center;
    filter: sepia(100%) hue-rotate(180deg) brightness(30%) contrast(150%);
    z-index: -2;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, var(--bg-color), rgba(5,5,5,0.7));
    z-index: -1;
}

.cta-container {
    text-align: center;
    max-width: 600px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* Footer */
.footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-desc {
    color: var(--text-secondary);
    margin: 1.5rem 0;
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--bg-surface-lighter);
    color: var(--text-primary);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--accent-color);
    color: #000;
    transform: translateY(-3px);
}

.footer h3 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}

.footer-links, .footer-contact {
    list-style: none;
}

.footer-links li, .footer-contact li {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-contact i {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    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: 992px) {
    .container-split {
        flex-direction: column;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .header .nav, .header .nav-btn {
        display: none; /* Add JS toggle for mobile menu later if needed */
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .timeline {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 20px;
    }
    
    .timeline-track {
        top: 0;
        left: 27px;
        width: 2px;
        height: 100%;
    }
    
    .timeline-track::after {
        width: 100%;
        height: 50%; /* Progress */
    }
    
    .timeline-step {
        flex-direction: row;
        width: 100%;
        margin-bottom: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}