.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  padding-top: 80px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.7);
}
.modal-content {
  background-color: #fff;
  position: fixed;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 20px;
  border-radius: 10px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.close {
  color: #aaa;
  position: absolute;
  top: 10px;
  right: 20px;
  font-size: 30px;
  cursor: pointer;
}
.close:hover {
  color: #000;
}
@media (max-width: 600px) {
  .modal-content {
    width: 90vw;       /* 화면 너비 90% */
    max-width: none;   /* 최대 너비 제한 해제 */
    max-height: 80vh;  /* 화면 높이 80% 제한 */
    overflow-y: auto;  /* 내용이 길면 스크롤 가능 */
    padding: 15px;
    box-sizing: border-box;
  }
}