body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background-color: #1a1a1a;
    color: #e0e0e0;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero {
    background: linear-gradient(90deg, #2a2a2a, #3a3a3a);
    text-align: center;
    padding: 4rem 0;
    border-bottom: 3px solid #00aaff;
}

.hero h1 {
    font-size: 3rem;
    margin: 0;
    color: #00aaff;
}

.tagline {
    font-style: italic;
    color: #b0b0b0;
    font-size: 1.5rem;
    margin: 0.5rem 0 1.5rem;
}

.download-button {
    display: inline-block;
    background-color: #00aaff;
    color: #fff;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    font-size: 1.2rem;
    transition: background-color 0.3s;
}

.download-button:hover {
    background-color: #0088cc;
}

main {
    padding: 2rem 0;
}

section {
    margin-bottom: 2rem;
}

h2 {
    color: #00aaff;
    font-size: 1.8rem;
    border-bottom: 2px solid #00aaff;
    padding-bottom: 0.5rem;
}

h3 {
    color: #00ccff;
    font-size: 1.5rem;
    margin-top: 1.5rem;
}

p {
    margin: 1rem 0;
}

ul, ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

ul li, ol li {
    margin-bottom: 0.5rem;
}

details {
    margin: 1rem 0;
    padding: 0.5rem;
    background: #2a2a2a;
    border-radius: 5px;
}

summary {
    cursor: pointer;
    font-weight: bold;
    color: #00ccff;
}

footer {
    background: #2a2a2a;
    text-align: center;
    padding: 1rem 0;
    border-top: 1px solid #00aaff;
}

footer p {
    margin: 0;
    color: #b0b0b0;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1.2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    .download-button {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }

    .container {
        padding: 0 15px;
    }
}