body {
    font-family: 'Poppins', system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 0;
    background: #fafafa;
    color: #333;
    text-align: center;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    padding: 6rem 1rem 4rem;
}

h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin: 0 0 0.8rem;
    line-height: 1.1;
}

small {
    display: block;
    font-size: 1.15rem;
    color: #666;
    margin-bottom: 3rem;
}

section {
    padding: 0 1.5rem 5rem;
    flex: 1;
}

p {
    font-size: 1.2rem;
    max-width: 620px;
    margin: 0 auto 2.5rem;
    line-height: 1.65;
}

button {
    background: #00c896;
    border: none;
    padding: 1.3rem 3.2rem;
    border-radius: 999px;
    color: white;
    font-size: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(0, 200, 150, 0.25);
    transition: all 0.3s ease;
    animation: pulse 2s infinite ease-in-out;
}

button:hover {
    background: #00aa7f;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 200, 150, 0.35);
}

button:active {
    transform: translateY(1px);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(0, 200, 150, 0.4);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(0, 200, 150, 0);
    }
}

footer {
    padding: 2rem 1rem;
    color: #888;
    font-size: 0.95rem;
}

hr {
    border: none;
    height: 1px;
    background: #eee;
    max-width: 400px;
    margin: 1.5rem auto 0;
}

/* Mobile adjustments */
@media (max-width: 600px) {
    h1 { font-size: 2.3rem; }
    small { font-size: 1rem; }
    button { padding: 1.1rem 2.8rem; font-size: 1.15rem; }
}