body {
    margin: 0;
    font-family: system-ui, sans-serif;
    color: #1f2328;
    background: #f6f8fa;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: #1f2a44;
    color: #ffffff;
}

.app-name {
    font-weight: bold;
}

main {
    max-width: 40rem;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

header form {
    margin: 0;
}

input {
    padding: 0.5rem;
    font-size: 1rem;
}

button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    cursor: pointer;
}

.error {
    color: #b42318;
}