body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f9f9f9;
    margin: 0;
    padding: 0;
    color: #333;
}

header {
    background: linear-gradient(90deg, #009688, #00796b);
    color: white;
    text-align: center;
    padding: 50px 20px;
}

header h1 {
    font-size: 42px;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
}

header p {
    font-size: 18px;
    margin-top: 10px;
}

nav {
    background: #004d40;
    text-align: center;
    padding: 12px 0;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 20px;
    font-weight: 600;
    transition: 0.3s;
}

nav a:hover, nav a.active {
    color: #80cbc4;
}

.intro {
    padding: 40px 20px;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.intro h2 {
    color: #00796b;
    font-size: 28px;
    margin-bottom: 20px;
}

.intro p {
    font-size: 18px;
    line-height: 1.6;
}

.articles {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

article {
    background: white;
    margin-bottom: 25px;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform 0.2s;
}

article:hover {
    transform: scale(1.02);
}

article h3 {
    color: #00695c;
    font-size: 22px;
    margin-bottom: 10px;
}

article p {
    font-size: 17px;
    line-height: 1.6;
}

footer {
    background: #004d40;
    color: white;
    text-align: center;
    padding: 20px 10px;
    margin-top: 40px;
}