.signup-section {
    max-width: 640px;
    background: var(--surface);
    border: 1px solid var(--border-soft);
    border-radius: var(--card-radius);
    box-shadow: var(--surface-shadow);
}

.signup-section h2 {
    font-size: clamp(1.75rem, 2.5vw, 2.25rem);
    margin-bottom: 1rem;
    color: var(--text);
}

.signup-section p {
    margin-top: 0;
    margin-bottom: 1.75rem;
    color: var(--muted);
}

.signup-form {
    display: grid;
    gap: 1rem;
}

.signup-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.form-field {
    display: grid;
    gap: 0.5rem;
}

.checkbox-field {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.checkbox-field input[type="checkbox"] {
    width: auto;
    min-width: 1.05rem;
    min-height: 1.05rem;
    margin-top: 0.15rem;
    accent-color: var(--accent);
}

.checkbox-field label {
    margin: 0;
    font-weight: 500;
    color: var(--muted);
}

@media (min-width: 640px) {
    .signup-section {
        padding: 2.5rem;
    }
}