:root {
    --primary: #6750A4;
    /* App Splash Icon Background (Purple) */
    --primary-variant: #4F378B;
    /* Darker Purple for hover */
    --bg-dark: #000000;
    /* App ColorPrimary */
    --surface: #121212;
    /* Slightly lighter black for cards */
    --text-primary: #FFFFFF;
    --text-secondary: #AAAAAA;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

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

/* Navigation */
nav {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: 100px 0;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #FFFFFF, #AAAAAA);
    /* Silver gradient */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.cta-button {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(103, 80, 164, 0.3);
    background-color: var(--primary-variant);
}

/* Features Grid */
.features {
    padding: 80px 0;
    background-color: var(--surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.feature-card {
    background: var(--bg-dark);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid #333;
    transition: border-color 0.3s;
}

.feature-card:hover {
    border-color: var(--primary);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-top: 0;
    color: var(--text-primary);
}

/* Footer */
footer {
    padding: 40px 0;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid #333;
    margin-top: 80px;
}

footer a {
    color: var(--text-secondary);
    margin: 0 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
}