/* CSS variables for a premium dark space theme */
:root {
    --bg-dark: #050508;
    --bg-lighter: #0a0a12;
    --text-main: #f5f5f7;
    --text-muted: #a1a1aa;
    --accent: #6b46c1;
    --accent-hover: #805ad5;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

h1, h2, h3, .logo {
    font-family: 'Space Grotesk', sans-serif;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: all 0.3s ease;
    background: transparent;
}

nav.scrolled {
    background: rgba(5, 5, 8, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    padding: 1rem 5%;
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent);
    transition: width 0.3s ease;
}

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

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

/* Hero Section */
.hero-section {
    height: 100vh;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(5,5,8,0.3) 0%, rgba(5,5,8,1) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 2rem;
}

.hero-content h1 {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -1px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.5);
    background: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2.5rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(107, 70, 193, 0.3);
}

/* Content Sections */
.content-section {
    padding: 8rem 5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.content-section.reverse {
    flex-direction: row-reverse;
}

.text-content {
    flex: 1;
}

.text-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 1rem;
}

.text-content h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent);
}

.text-content p {
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* Stats */
.stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat-box {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    font-family: 'Space Grotesk', sans-serif;
    color: white;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Lists */
.feature-list {
    list-style: none;
    margin-top: 2rem;
}

.feature-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1rem;
    color: var(--text-main);
    font-size: 1.1rem;
}

.feature-list li::before {
    content: '✦';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* Glass Effect Images */
.image-content {
    flex: 1;
    position: relative;
    border-radius: 20px;
    overflow: hidden;
}

.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 1rem;
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.5s ease;
}

.glass-effect:hover {
    transform: translateY(-10px);
}

.image-content img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    display: block;
    object-fit: cover;
    aspect-ratio: 4/3;
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 6rem 5%;
    max-width: 800px;
    margin: 0 auto;
    background: radial-gradient(circle at center, var(--bg-lighter) 0%, transparent 100%);
    border-top: 1px solid var(--glass-border);
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.subscribe-form {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.subscribe-form input {
    padding: 1rem 1.5rem;
    border-radius: 30px;
    border: 1px solid var(--glass-border);
    background: rgba(255,255,255,0.05);
    color: white;
    width: 100%;
    max-width: 350px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s ease;
}

.subscribe-form input:focus {
    border-color: var(--accent);
}

/* Footer */
footer {
    padding: 3rem 5%;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.reveal.active, .fade-in.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
    .content-section, .content-section.reverse {
        flex-direction: column;
        text-align: center;
        padding: 5rem 5%;
    }
    
    .text-content h2::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .feature-list li {
        text-align: left;
        display: inline-block;
        width: 100%;
    }
    
    .stats {
        justify-content: center;
    }

    .subscribe-form {
        flex-direction: column;
        align-items: center;
    }

    .subscribe-form input {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
}