/* ============================================================
   Optma DS · Button · v0.1
   Anatomia base + variantes + tamanhos + estados.
   Depende de tokens.css.
============================================================ */

.opt-btn {
  /* base */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--opt-space-2);
  position: relative;
  isolation: isolate;

  font-family: var(--opt-font-display);
  font-weight: var(--opt-weight-semibold);
  font-size: var(--opt-text-base);
  line-height: 1;
  letter-spacing: var(--opt-tracking-normal);
  white-space: nowrap;
  text-decoration: none;

  height: 44px;
  padding: 0 var(--opt-space-5);
  border: 1.5px solid transparent;
  border-radius: var(--opt-radius-md);
  cursor: pointer;
  user-select: none;

  transition: transform var(--opt-duration-base) var(--opt-ease-out),
              background-color var(--opt-duration-base) var(--opt-ease-out),
              border-color var(--opt-duration-base) var(--opt-ease-out),
              color var(--opt-duration-base) var(--opt-ease-out),
              box-shadow var(--opt-duration-base) var(--opt-ease-out);
}

.opt-btn:focus-visible {
  outline: none;
  box-shadow: var(--opt-ring-green);
}

.opt-btn:disabled,
.opt-btn[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none !important;
  box-shadow: none !important;
}

/* -----------------------------------------
   Variante · primary (verde sólido)
   ----------------------------------------- */
.opt-btn--primary {
  background: var(--opt-green);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(52, 150, 59, 0.28);
}

.opt-btn--primary:hover:not(:disabled) {
  background: var(--opt-green-deep);
  box-shadow: 0 8px 24px rgba(52, 150, 59, 0.38);
  transform: translateY(-1px);
}

.opt-btn--primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(52, 150, 59, 0.32);
}

/* -----------------------------------------
   Variante · outline
   ----------------------------------------- */
.opt-btn--outline {
  background: transparent;
  color: var(--opt-ink);
  border-color: var(--opt-rule);
}

.opt-btn--outline:hover:not(:disabled) {
  border-color: var(--opt-ink);
}

.opt-btn--outline:active:not(:disabled) {
  background: var(--opt-paper-soft);
}

/* -----------------------------------------
   Variante · ghost
   ----------------------------------------- */
.opt-btn--ghost {
  background: transparent;
  color: var(--opt-ink-mid);
}

.opt-btn--ghost:hover:not(:disabled) {
  background: var(--opt-paper-soft);
  color: var(--opt-ink);
}

/* -----------------------------------------
   Variante · secondary (verde suave)
   ----------------------------------------- */
.opt-btn--secondary {
  background: rgba(52, 150, 59, 0.10);
  color: var(--opt-green-deep);
}

.opt-btn--secondary:hover:not(:disabled) {
  background: rgba(52, 150, 59, 0.16);
}

/* -----------------------------------------
   Variante · danger
   ----------------------------------------- */
.opt-btn--danger {
  background: var(--opt-error);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(230, 69, 69, 0.28);
}

.opt-btn--danger:hover:not(:disabled) {
  background: #C73838;
  box-shadow: 0 8px 24px rgba(230, 69, 69, 0.38);
  transform: translateY(-1px);
}

.opt-btn--danger:focus-visible {
  box-shadow: var(--opt-ring-error);
}

/* -----------------------------------------
   Tamanhos
   ----------------------------------------- */
.opt-btn--sm {
  height: 32px;
  padding: 0 var(--opt-space-4);
  font-size: var(--opt-text-sm);
  border-radius: var(--opt-radius-sm);
}

.opt-btn--lg {
  height: 52px;
  padding: 0 var(--opt-space-7);
  font-size: var(--opt-text-md);
  border-radius: var(--opt-radius-lg);
}

/* -----------------------------------------
   Modificadores
   ----------------------------------------- */
.opt-btn--full {
  width: 100%;
}

.opt-btn--icon-only {
  padding: 0;
  width: 44px;
}
.opt-btn--icon-only.opt-btn--sm { width: 32px; }
.opt-btn--icon-only.opt-btn--lg { width: 52px; }

/* Ícone dentro do botão */
.opt-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.opt-btn--lg svg { width: 18px; height: 18px; }
.opt-btn--sm svg { width: 14px; height: 14px; }

/* -----------------------------------------
   Estado · loading
   ----------------------------------------- */
.opt-btn.is-loading {
  cursor: progress;
  pointer-events: none;
}

.opt-btn.is-loading .opt-btn__label,
.opt-btn.is-loading svg:not(.opt-btn__spinner) {
  visibility: hidden;
}

.opt-btn__spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: var(--opt-radius-full);
  animation: opt-btn-spin 0.7s linear infinite;
}

@keyframes opt-btn-spin {
  to { transform: rotate(360deg); }
}