html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: system-ui, -apple-system, sans-serif;
    background: #fafafa;
    color: #111;
}

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1rem;
    gap: 2rem;
}

h1 {
    font-size: clamp(2rem, 8vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}

input[type="text"] {
    display: block;
    width: 100%;
    max-width: 400px;
    box-sizing: border-box;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 0.5rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="text"]:focus {
    border-color: #111;
}