.help-modal {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.5);
  z-index: 9999;
}
.help-modal-content {
  background: #fff;
  max-width: 600px;
  width: 90%;
  max-height: 80%;
  overflow-y: auto;
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  position: relative;
}
.help-close {
  position: absolute;
  top: 0.5rem; right: 0.5rem;
  background: #000;
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 0.25rem;
}
.help-button {
  display: inline-block;
  margin-left: 0.5rem;
  width: 1.25rem;
  height: 1.25rem;
  line-height: 1.25rem;
  text-align: center;
  border-radius: 0;           /* square shape */
  background: #ffffff;        /* white background */
  color: #000000;             /* black “?” */
  border: 1px solid #000000;  /* black border */
  font-weight: bold;
  font-size: 0.85rem;
  cursor: pointer;
}

.help-content { display: none; }