.tab-btn {
  padding: 0.5rem 1rem;
  border: none;
  background: transparent;
  font-family: "mypinar" ,sans-serif;
  font-weight: bold;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  color: #787878;
  margin-left: 0.5rem;
}
.tab-btn.active { color: #24aca0; border-bottom-color: #24aca0; }

.tab-panel { margin-top: 1rem; }

.tab-content { display: none; opacity: 0; transition: opacity 0.3s ease; }
.tab-content.active { display: block; opacity: 1; }

/* جعبه متن (collapsed: 7rem) */
.textBox {
  max-height: 19.5rem;
  overflow: hidden;
  position: relative;
  transition: max-height 0.85s ease;
  background: #fff;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
}
.textBox.expanded { /* class marker - بعد از expand ممکن max-height به none تبدیل شود */ }

.controls { margin-top: 0.25rem; text-align: left; }
.controls button {
  border: none;
  background: none;
  color: #24aca0;
  font-weight: bold;
  cursor: pointer;
  padding: 0 0.4rem;
}
.hidden { display: none; }