body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(to bottom, #0f172a, #1e293b);
    color: white;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
}

header h1 {
    font-size: 1.8rem;
    font-weight: bold;
}

nav a {
    margin-left: 1.5rem;
    text-decoration: none;
    color: white;
    transition: color 0.2s;
}

nav a:hover {
    color: #38bdf8;
}

main {
    flex: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

main h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

main p {
    color: #cbd5e1;
    max-width: 40rem;
    margin-bottom: 2rem;
}

main a {
    background: #0ea5e9;
    padding: 0.8rem 1.5rem;
    border-radius: 1rem;
    font-weight: 600;
    text-decoration: none;
    color: white;
    transition: background 0.2s;
}

main a:hover {
    background: #38bdf8;
}

section {
    padding: 4rem 2rem;
    text-align: center;
}

.features {
    background: #0f172a;
}

.features-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    max-width: 80rem;
    margin: 0 auto;
}

.feature-box {
    background: #1e293b;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.feature-box h3 {
    margin-bottom: 0.8rem;
}

.feature-box p {
    color: #94a3b8;
}

.download-buttons button {
    background: #0ea5e9;
    color: white;
    font-weight: 600;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 1rem;
    margin: 0.5rem;
    cursor: pointer;
    transition: background 0.2s;
}

.download-buttons button:hover {
    background: #38bdf8;
}

footer {
    text-align: center;
    color: #94a3b8;
    padding: 2rem;
    font-size: 0.9rem;
    border-top: 1px solid #334155;
}