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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #000;
    color: #fff;
    line-height: 1.6;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #00ff88;
}

.nav-cta {
    background: #00ff88;
    color: #000;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.4);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    background: radial-gradient(ellipse at center, #111 0%, #000 70%);
}

.hero-content h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #00ff88 0%, #00ccff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #888;
    margin-bottom: 2.5rem;
}

.app-store-btn img {
    height: 50px;
    transition: transform 0.2s;
}

.app-store-btn:hover img {
    transform: scale(1.05);
}

/* Features */
.features {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #00ff88;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: #111;
    border: 1px solid #222;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: #00ff88;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: #fff;
}

.feature-card p {
    color: #888;
    font-size: 0.95rem;
}

/* Premium */
.premium {
    padding: 6rem 2rem;
    background: linear-gradient(180deg, #000 0%, #0a0a0a 100%);
    text-align: center;
}

.premium h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #ffd700 0%, #ff8c00 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.premium-subtitle {
    color: #888;
    margin-bottom: 2rem;
}

.premium-features ul {
    list-style: none;
    display: inline-block;
    text-align: left;
}

.premium-features li {
    padding: 0.75rem 0;
    font-size: 1.1rem;
    color: #ccc;
}

.premium-features li::before {
    content: "✓";
    color: #ffd700;
    margin-right: 0.75rem;
    font-weight: bold;
}

/* Footer */
footer {
    background: #0a0a0a;
    border-top: 1px solid #222;
    padding: 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-content p {
    color: #666;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: #888;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #00ff88;
}

/* Responsive */
@media (max-width: 768px) {
    nav {
        padding: 1rem;
    }

    .hero {
        padding: 5rem 1.5rem 3rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .features, .premium {
        padding: 4rem 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}