body {
    margin: 0;
    font-family: sans-serif;
    line-height: 1.6;
    background-color: #e6f3fa;
    color: #003d5b;
}

header, footer {
    background: #003d5b;
    color: #ffffff;
    padding: 1rem;
    text-align: center;
}

.btn {
    background: #007BFF;
    color: #fff;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s ease;
}
.btn:hover {
    background: #0056b3;
}

.hero {
    background: #d0ecf8;
    padding: 2rem;
    text-align: center;
}

.categories {
    display: flex;
    gap: 1rem;
    justify-content: center;
    padding: 2rem;
    flex-wrap: wrap;
}

.card {
    background: #ffffff;
    padding: 1rem;
    border: 1px solid #aad4ec;
    border-radius: 6px;
    width: 30%;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 61, 91, 0.1);
}
.card h3 {
    color: #005b96;
}
.card p {
    color: #336b87;
}

.subscribe {
    text-align: center;
    padding: 2rem;
    background: #c6e2f5;
}

form {
    margin-top: 1rem;
}

input[type="email"] {
    padding: 0.5rem;
    width: 250px;
    margin-right: 1rem;
    border: 1px solid #aacfe2;
    border-radius: 4px;
}

button {
    padding: 0.5rem 1rem;
    background: #007BFF;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s ease;
}
button:hover {
    background: #0056b3;
}