:root {
    --bg-dark: #07090F;
    --bg-surface: rgba(20, 24, 38, 0.6);
    --text-primary: #FFFFFF;
    --text-muted: #94A3B8;
    --accent: #38BDF8;
    --accent-glow: rgba(56, 189, 248, 0.3);
    
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Playfair Display', serif;
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(7, 9, 15, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: 2px;
}

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

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

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

.btn-outline {
    border: 1px solid var(--accent);
    padding: 0.5rem 1.5rem;
    border-radius: 30px;
    color: var(--accent) !important;
}

.btn-outline:hover {
    background: var(--accent);
    color: var(--bg-dark) !important;
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 5%;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('./assets/hero_bg.png');
    background-size: cover;
    background-position: center;
    z-index: -1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, transparent 0%, var(--bg-dark) 100%),
                linear-gradient(to bottom, rgba(7,9,15,0.3) 0%, var(--bg-dark) 100%);
}

.hero-content {
    max-width: 800px;
    z-index: 1;
}

.hero-content h1 {
    font-family: var(--font-serif);
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s 0.2s forwards;
}

.hero-content h1 span {
    color: var(--accent);
    font-style: italic;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s 0.4s forwards;
}

.hero-actions {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s 0.6s forwards;
}

.btn-primary {
    display: inline-block;
    background: var(--accent);
    color: var(--bg-dark);
    padding: 1rem 2.5rem;
    border-radius: 30px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 25px rgba(56, 189, 248, 0.5);
}

/* Scroll indicator */
.scroll-down {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeUp 1s 1s forwards;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 13px;
    position: relative;
}

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

@keyframes scroll {
    0% { transform: translate(-50%, 0); opacity: 1; }
    100% { transform: translate(-50%, 15px); opacity: 0; }
}

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

/* Sections */
.section {
    padding: 6rem 5%;
}

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

.section-title {
    font-family: var(--font-serif);
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 4rem;
    font-size: 1.1rem;
}

.text-center {
    text-align: center;
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.service-card {
    background: var(--bg-surface);
    border: 1px solid rgba(255,255,255,0.05);
    padding: 2.5rem;
    border-radius: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(10px);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border-color: rgba(56, 189, 248, 0.2);
}

.service-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

/* Demos */
.dark-section {
    background: rgba(0,0,0,0.3);
}

.demos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.demo-card {
    background: var(--bg-surface);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
    transition: all 0.3s ease;
    display: block;
}

.demo-card:hover:not(.placeholder) {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 15px 40px rgba(0,0,0,0.4);
}

.demo-image {
    height: 250px;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

.demo-overlay {
    position: absolute;
    inset: 0;
    background: rgba(7,9,15,0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.demo-card:hover .demo-overlay {
    opacity: 1;
}

.demo-overlay span {
    padding: 0.8rem 2rem;
    border: 1px solid var(--accent);
    border-radius: 30px;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.placeholder-content {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255,255,255,0.02);
    color: var(--text-muted);
    font-size: 1.2rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.demo-info {
    padding: 2rem;
}

.tag {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 0.8rem;
    background: var(--accent-glow);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
}

.demo-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
}

.demo-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.demo-card.placeholder {
    cursor: default;
    opacity: 0.7;
}

/* Footer */
footer {
    padding: 2rem 5%;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.05);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 3rem;
    }
    .nav-links {
        display: none; /* In a real scenario, add a hamburger menu */
    }
}