.big-photo-btn {
  width: 97%;
  padding: 8px;
  font-size: 16px;
  font-weight: bold;
  background: #2b6cb0;
  color: white;
  text-align: center;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: 0.2s;
}

.big-photo-btn:hover {
  background: #3182ce;
}

.big-photo-btn:active {
  transform: scale(0.98);
}

/* =============================
   SMARTPHONE / TABLETTE
============================= */

@media (orientation: portrait) and (max-width: 1200px) {
  .big-photo-btn {
    font-size: 38px;
    font-weight: bold;
    padding: 15px;
    }
}