/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    font-size: var(--fs-sm);
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
    white-space: nowrap;
}

.btn--primary {
    background-color: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

.btn--primary:hover {
    background-color: transparent;
    color: var(--color-black);
}

.btn--outline {
    background-color: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.8);
}

.btn--outline:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

.btn--outline-dark {
    background-color: transparent;
    color: var(--color-black);
    border-color: var(--color-black);
}

.btn--outline-dark:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn--lg {
    padding: 1.125rem 2.5rem;
    font-size: var(--fs-base);
}

.btn--xl {
    padding: 1.25rem 3rem;
    font-size: var(--fs-base);
    min-width: 280px;
}

.btn--full { width: 100%; }

.btn:disabled,
.btn--disabled {
    opacity: 0.45;
    pointer-events: none;
    cursor: not-allowed;
}