/* ===== PDF Toggle Button (Global) ===== */
.pdf-toggle-btn{
  display:flex;
  align-items:center;
  justify-content:space-between;
  width:100%;
  background:#e0f0f1;
  color:#000;
  padding:16px 20px;
  border-radius:8px;
  font-size:1.1rem;
  font-weight:600;
  border:none;
}

.pdf-toggle-btn:hover,
.pdf-toggle-btn:focus{
  background:#cfe6e8;
  color:#000;
  text-decoration:none;
}

.pdf-toggle-btn .btn-arrow{
  font-size:1.4rem;
  line-height:1;
  transition:transform .25s ease;
}

.pdf-toggle-btn.is-open .btn-arrow{
  transform:rotate(90deg);
}

/* ===== PDF Wrapper ===== */
.pdf-wrapper{
  margin-top:12px;
  border:1px solid #ddd;
  border-radius:8px;
  overflow:hidden;
  background:#000;
}

/* 桌機 */
.pdf-viewer-iframe{
  width:100%;
  height:80vh;
  border:0;
}

/* ✅ 手機改 100vh */
@media (max-width: 768px){
  .pdf-viewer-iframe{
    height:100vh;
  }
}