/**
 * Estilo padrão dos formulários [brain_form].
 * Pensado para integrar com a maioria dos temas claros — usa variáveis CSS
 * para que cada site possa sobrescrever com facilidade no Customizer.
 */
.brain-form {
    --bf-bg: #ffffff;
    --bf-border: #e5e7eb;
    --bf-radius: 12px;
    --bf-text: #111827;
    --bf-muted: #6b7280;
    --bf-accent: #2563eb;
    --bf-accent-hover: #1d4ed8;
    --bf-error: #b91c1c;
    --bf-success: #047857;

    background: var(--bf-bg);
    border: 1px solid var(--bf-border);
    border-radius: var(--bf-radius);
    padding: 24px;
    margin: 24px 0;
    color: var(--bf-text);
    font-family: inherit;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    max-width: 560px;
}

.brain-form__header {
    margin-bottom: 16px;
}

.brain-form__headline {
    margin: 0 0 6px;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.3;
}

.brain-form__sub {
    margin: 0;
    color: var(--bf-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.brain-form__fields {
    display: grid;
    gap: 12px;
    margin-bottom: 12px;
}

.brain-form__field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.875rem;
}

.brain-form__field > span {
    color: var(--bf-muted);
    font-weight: 500;
}

.brain-form__field input,
.brain-form__field textarea {
    appearance: none;
    width: 100%;
    box-sizing: border-box;
    padding: 10px 12px;
    border: 1px solid var(--bf-border);
    border-radius: 8px;
    background: #fff;
    color: var(--bf-text);
    font-size: 1rem;
    line-height: 1.4;
    font-family: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.brain-form__field input:focus,
.brain-form__field textarea:focus {
    outline: none;
    border-color: var(--bf-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.brain-form__field textarea {
    resize: vertical;
    min-height: 96px;
}

.brain-form__consent {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin: 8px 0 16px;
    font-size: 0.85rem;
    color: var(--bf-muted);
    line-height: 1.4;
    cursor: pointer;
}

.brain-form__consent input[type="checkbox"] {
    margin-top: 3px;
    flex-shrink: 0;
    accent-color: var(--bf-accent);
}

.brain-form__submit {
    appearance: none;
    width: 100%;
    padding: 12px 20px;
    border: 0;
    border-radius: 8px;
    background: var(--bf-accent);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.05s ease;
    font-family: inherit;
}

.brain-form__submit:hover:not(:disabled) {
    background: var(--bf-accent-hover);
}

.brain-form__submit:active:not(:disabled) {
    transform: translateY(1px);
}

.brain-form__submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.brain-form__msg {
    margin-top: 12px;
    font-size: 0.9rem;
    min-height: 1.2em;
    line-height: 1.4;
}

.brain-form__msg--success {
    color: var(--bf-success);
}

.brain-form__msg--error {
    color: var(--bf-error);
}

/* Honeypot anti-spam — invisível para humanos */
.brain-form__hp {
    position: absolute !important;
    left: -9999px !important;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

/* Variante "link CTA": só headline + botão de redirect */
.brain-form--link {
    text-align: center;
}

.brain-form__cta-link {
    display: inline-block;
    text-decoration: none;
    width: auto;
    min-width: 200px;
}

.brain-form__radios {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 4px;
}

.brain-form__radio {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border: 1px solid var(--bf-border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: border-color 0.15s ease;
}

.brain-form__radio:hover {
    border-color: var(--bf-accent);
}

.brain-form__radio input[type="radio"] {
    accent-color: var(--bf-accent);
}

.brain-form__field--radio > span {
    display: block;
    color: var(--bf-muted);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.brain-form__field select {
    appearance: none;
    width: 100%;
    box-sizing: border-box;
    padding: 10px 12px;
    border: 1px solid var(--bf-border);
    border-radius: 8px;
    background: #fff
        url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b7280' d='M6 8 0 0h12z'/%3E%3C/svg%3E")
        no-repeat right 12px center;
    background-size: 10px;
    color: var(--bf-text);
    font-size: 1rem;
    font-family: inherit;
    cursor: pointer;
}

.brain-form__field select:focus {
    outline: none;
    border-color: var(--bf-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Modo escuro: detecta preferência do tema */
@media (prefers-color-scheme: dark) {
    .brain-form {
        --bf-bg: #1f2937;
        --bf-border: #374151;
        --bf-text: #f9fafb;
        --bf-muted: #9ca3af;
    }

    .brain-form__field input,
    .brain-form__field textarea {
        background: #111827;
        color: var(--bf-text);
    }
}