:root {
    --bg-color: #161616;
    --card-bg: #222222;
    --text-primary: #EEEEEE;
    --text-secondary: #AAAAAA;
    --accent-color: #4CAF50;
    --danger-color: #F44336;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 0;
    border-bottom: 1px solid #333;
    margin-bottom: 40px;
}

.logo {
    max-width: 150px;
    height: auto;
    margin-bottom: 20px;
    border-radius: 20%;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

h1 {
    font-size: 3rem;
    margin: 10px 0;
    letter-spacing: 2px;
    text-transform: uppercase;
}

h1 span {
    color: var(--accent-color);
}

h2 {
    color: var(--accent-color);
    border-left: 4px solid var(--accent-color);
    padding-left: 15px;
    margin-top: 50px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #333;
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.feature-card h3 {
    margin-top: 0;
    color: #fff;
}

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

nav {
    margin-top: 40px;
    text-align: center;
}

nav a {
    margin: 0 15px;
    text-decoration: none;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 0.9rem;
}

nav a:hover {
    text-decoration: underline;
}

footer {
    margin-top: 80px;
    padding-top: 20px;
    border-top: 1px solid #333;
    text-align: center;
    font-size: 0.85em;
    color: #666;
}

/* Mobile Optimizations */
@media (max-width: 600px) {
    h1 {
        font-size: 2.2rem;
    }
    body {
        padding: 15px;
    }
    .feature-grid {
        grid-template-columns: 1fr;
    }
}