* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f0f4f8;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

main {
    text-align: center;
    background-color: white;
    padding: 2rem 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #333;
}

#value {
    display: block;
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
}

.btn-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    opacity: 0.9;
}