body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #ffffff;
    color: #111;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 2.4rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    color: #555;
}

.book-cover img {
    width: 100%;
    max-width: 350px;
    display: block;
    margin: 0 auto 30px auto;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.buy-buttons {
    text-align: center;
    margin-bottom: 40px;
}

.btn {
    display: inline-block;
    padding: 12px 20px;
    margin: 10px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    color: white;
}

.leap { background: #4a4aff; }
.gumroad { background: #ff5a5f; }
.payhip { background: #00b894; }

.features, .author {
    margin-bottom: 40px;
}

.features h2, .author h2 {
    font-size: 1.6rem;
    margin-bottom: 15px;
}

.features ul {
    list-style: none;
    padding: 0;
}

.features li {
    background: #f5f5f5;
    padding: 12px;
    margin-bottom: 10px;
    border-radius: 6px;
}

footer {
    text-align: center;
    font-size: 0.9rem;
    color: #777;
    margin-top: 40px;
}