body {
    font-family: 'Helvetica', 'Arial', sans-serif;
    background-color: #e9f7f6;
    color: #333;
    margin: 0;
    padding: 0;
}
header {
    background-color: #48c7c3;
    color: white;
    padding: 1rem 2rem;
}
nav a {
    color: white;
    margin-right: 1rem;
    text-decoration: none;
}
nav a:hover {
    text-decoration: underline;
}
.container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}
h1, h2, h3 {
    color: #048b8d;
}
.card {
    background-color: white;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.r18 {
    filter: blur(15px);
    transition: filter 0.3s;
    cursor: pointer;
}
.r18:hover {
    filter: none;
}
footer {
    background-color: #48c7c3;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 3rem;
}