<div id="myModal" class="modal-overlay">
  <div class="modal-box">
    <span class="close-icon" onclick="closeModal()">&times;</span>
    <h2>Confirmation</h2>
    <p>Are you sure you want to proceed with this action? This cannot be undone.</p>
    <div class="modal-actions">
      <button class="btn-cancel" onclick="closeModal()">Cancel</button>
      <button class="btn-confirm">Confirm</button>
    </div>
  </div>
</div>
<button onclick="openModal()">Open Modal</button>

.modal-overlay {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.modal-overlay.show {
  display: flex;
  opacity: 1;
}
.modal-box {
  background: white;
  padding: 30px;
  border-radius: 16px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.1);
  transform: scale(0.9);
  transition: transform 0.3s ease;
  position: relative;
}
.modal-overlay.show .modal-box {
  transform: scale(1);
}
.modal-box h2 {
  margin-top: 0;
  color: #111827;
}
.modal-box p {
  color: #6b7280;
  line-height: 1.5;
  margin-bottom: 25px;
}
.close-icon {
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 1.5rem;
  cursor: pointer;
  color: #9ca3af;
}
.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.modal-actions button {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight: 600;
}
.btn-cancel {
  background: #f3f4f6;
  color: #374151;
}
.btn-confirm {
  background: #ef4444;
  color: white;
}

function openModal() {
  const modal = document.getElementById("myModal");
  modal.classList.add("show");
}
function closeModal() {
  const modal = document.getElementById("myModal");
  modal.classList.remove("show");
}