:root {
    --bg-color: #0a0a0a;
    --text-color: #ffffff;
    --accent-color: #00f2ff;
    --accent-secondary: #7000ff;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --section-spacing: 120px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.1rem;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: rgba(10,10,10,0.8);
    backdrop-filter: blur(10px);
}

.navbar .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: white;
}

.nav-btn {
    padding: 0.5rem 1.5rem;
    margin: 0;
    font-size: 1rem;
    background: none; 
    border: 1px solid rgba(255,255,255,0.2);
}

.nav-btn:hover {
    background: rgba(255,255,255,0.1);
}

section {
    padding: var(--section-spacing) 0;
    position: relative;
}

/* Header / Hero */
header {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% 50%, rgba(112, 0, 255, 0.15) 0%, rgba(10, 10, 10, 0) 70%);
    z-index: -1;
}

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

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.download-btn {
    display: inline-block;
    background: linear-gradient(90deg, var(--accent-secondary) 0%, var(--accent-color) 100%);
    color: white;
    padding: 1rem 3rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.2rem;
    margin-top: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 242, 255, 0.2);
}

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

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
}

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

/* Showcase Section */
.showcase {
    display: flex;
    align-items: center;
    gap: 4rem;
    margin-bottom: 8rem;
}

.showcase:nth-child(even) {
    flex-direction: row-reverse;
}

.showcase-text {
    flex: 1;
}

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

.showcase-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--glass-border);
    transition: transform 0.5s ease;
}

.showcase-image:hover img {
    transform: scale(1.02);
}

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

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

/* Footer */
footer {
    text-align: center;
    padding: 4rem 0;
    background: var(--glass-bg);
    margin-top: 4rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    margin: 0 1rem;
    transition: color 0.3s ease;
}

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

/* Mobile Responsiveness */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .showcase {
        flex-direction: column !important;
        gap: 2rem;
        margin-bottom: 4rem;
        text-align: center;
    }
    
    .hero-content {
        padding: 0 20px;
    }

    .features-grid {
        grid-template-columns: 1fr; /* Force single column on mobile */
        margin-top: 2rem;
    }

    section {
        padding: 60px 0; /* Reduce spacing on mobile */
    }
    
    .navbar {
        padding: 15px;
    }

    .download-btn:not(.nav-btn) {
        padding: 0.8rem 2rem;
        font-size: 1rem;
        width: 100%; /* Full width button on mobile, except in nav */
        box-sizing: border-box;
    }
    
    .nav-btn {
        padding: 0.4rem 1rem;
        font-size: 0.9rem;
    }
}