* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #111827;
    color: white;
    line-height: 1.6;
}

header {
    text-align: center;
    padding: 80px 20px;
    background-color: #1f2937;
}

header h1 {
    font-size: 48px;
    margin-bottom: 5px;
}

header p {
    font-size: 20px;
    color: #d1d5db;
}

main {
    max-width: 1000px;
    margin: auto;
    padding: 40px 20px;
}

section {
    background-color: #1f2937;
    margin-bottom: 25px;
    padding: 30px;
    border-radius: 10px;
}

h2 {
    margin-top: 0;
}.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.cert-card {
    background-color: #111827;
    padding: 20px;
    border-radius: 8px;
}

.cert-card h3 {
    margin-top: 0;
}

.cert-card a {
    display: inline-block;
    text-decoration: none;
    color: white;
    border: 1px solid white;
    padding: 8px 14px;
    border-radius: 5px;
}

.cert-card a:hover {
    background-color: white;
    color: #111827;
}