:root {
    --petrol: #004d4d;
    --gray-light: #f5f5f5;
    --gray-dark: #333;
    --text: #222;
    --accent: #007f7f;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-light);
    color: var(--text);
}

header {
    background-color: var(--petrol);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

a {
    color: var(--petrol);
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

nav a {
    color: white;
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 500;
}

.button {
    background-color: var(--petrol);
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    padding: 0.75rem;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.button:hover {
    background-color: #ddd;
}

.button.active {
    background-color: var(--accent);
    color: white;
    transform: scale(1.05);
}

.hero {
    background-color: var(--gray-dark);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

.section {
    padding: 3rem 2rem;
    max-width: 1000px;
    margin: auto;
}

.section h3 {
    color: var(--petrol);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card h4 {
    margin-top: 0;
    color: var(--accent);
}

footer {
    background-color: var(--petrol);
    color: white;
    text-align: center;
    padding: 1rem 2rem;
    margin-top: 2rem;
}

footer a {
    color: white;
}