element-call/src/Modal.module.css

.modalOverlay {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: rgba(23, 25, 28, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  background: #21262c;
  box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.15);
  border-radius: 8px;
  max-width: 90vw;
  width: 600px;
  display: flex;
  flex-direction: column;
}

.modalHeader {
  display: flex;
  justify-content: space-between;
  padding: 34px 34px 0 34px;
}

.modalHeader h3 {
  font-size: 24px;
  margin: 0;
}

.closeButton {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: transparent;
  padding: 0;
  border: none;
  cursor: pointer;
}

.content {
  padding: 24px 32px;
}

.content p {
  margin-top: 0;
}

@media (max-width: 799px) {
  .modalHeader {
    display: flex;
    justify-content: space-between;
    padding: 24px 24px 0 24px;
  }

  .modal.mobileFullScreen {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    border-radius: 0;
  }
}