body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header, footer {
    background-color: black;
    color: white;
    text-align: center;
    padding: 20px 0;
}

h1 {
    margin: 0;
    font-size: 2em;
}

h2 {
    margin: 5px 0;
    font-size: 1.5em;
}

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

.skills, .experience, .certifications {
    padding: 10px;
    margin: 20px 0;
    border-radius: 10px;
}

.skills {
    background-color: red;
}

.experience {
    background-color: purple;
    color: white;
    border-radius: 50px;
    padding: 20px;
    text-align: center;
}

.certifications {
    background-color: pink;
    padding: 15px;
    text-align: center;
}

.certification-image {
    max-width: 100px;
    margin: 10px;
}

.buttons {
    margin: 20px 0;
}

.button {
    background-color: black;
    color: white;
    border: none;
    padding: 10px 20px;
    margin: 5px;
    cursor: pointer;
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
}