* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.7;
}

.container {
    width: 90%;
    max-width: 900px;
    margin: 40px auto;
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0,0,0,.08);
}

header {
    text-align: center;
    margin-bottom: 35px;
    border-bottom: 2px solid #25D366;
    padding-bottom: 20px;
}

header h1 {
    font-size: 2.2rem;
    color: #128C7E;
}

header p {
    color: #666;
    margin-top: 8px;
}

section {
    margin-bottom: 30px;
}

section h2 {
    color: #128C7E;
    margin-bottom: 10px;
    font-size: 1.3rem;
}

section p {
    margin-bottom: 10px;
}

ul {
    margin-left: 25px;
}

li {
    margin-bottom: 8px;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    color: #777;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 25px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    section h2 {
        font-size: 1.15rem;
    }
}