* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    background: #f4f5f7;
    color: #1a1a1a;
    margin: 0;
    padding: 2rem 1rem;
}

main {
    max-width: 420px;
    margin: 2rem auto;
    background: #fff;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

label {
    font-size: 0.875rem;
    font-weight: 600;
}

input {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    margin-top: 0.5rem;
    padding: 0.6rem;
    background: #1a56db;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
}

button:hover {
    background: #1543a8;
}

.error {
    background: #fde8e8;
    color: #9b1c1c;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
}

a {
    color: #1a56db;
}