* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    color: #111;
}

.app {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.card {
    width: 100%;
    max-width: 680px;
    padding: 3rem;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.eyebrow {
    margin: 0 0 1rem;
    font-size: 0.875rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #666;
}

h1 {
    margin: 0 0 1rem;
    font-size: clamp(2.5rem, 8vw, 5rem);
    line-height: 1;
}

p {
    font-size: 1.125rem;
    line-height: 1.5;
}

button {
    margin-top: 1.5rem;
    padding: 0.9rem 1.4rem;
    border: 0;
    border-radius: 999px;
    background: #111;
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
}

button:hover {
    opacity: 0.85;
}

.message {
    min-height: 1.5rem;
    font-weight: 700;
}