/* ===== オーバレイ全体 ===== */
#overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(245, 242, 248, 0.96); /* やさしい紫がかった白 */
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

/* ===== 中央パネル ===== */
.overlay-content {
  background: linear-gradient(
    180deg,
    #fbf9fd,
    #f4eff7
  );
  border: 2px solid #c7b3d9; /* 上品な紫縁 */
  border-radius: 18px;
  padding: 2em;
  text-align: center;
  box-shadow:
    0 8px 24px rgba(90, 60, 120, 0.18),
    inset 0 0 10px rgba(255, 255, 255, 0.6);
  max-width: 400px;
}

/* ===== 強調文字 ===== */
.highlight {
  font-weight: bold;
  color: #6b4a8b; /* 落ち着いた藤紫 */
}

/* ===== パスワード入力 ===== */
.input-password {
  padding: 0.6em;
  font-size: 1em;
  width: 80%;
  border: 1px solid #cbbad8;
  border-radius: 10px;
  margin-bottom: 1em;
  background: #ffffff;
}

.input-password:focus {
  outline: none;
  border-color: #8a6fb3;
  box-shadow: 0 0 6px rgba(138, 111, 179, 0.4);
}

/* ===== 送信ボタン ===== */
.button-submit {
  padding: 0.6em 1.4em;
  font-size: 1em;
  color: #fff;
  background: linear-gradient(
    135deg,
    #7a5ea6,
    #5e3f8c
  );
  border: none;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(94, 63, 140, 0.35);
}

.button-submit:hover {
  background: linear-gradient(
    135deg,
    #8a6fb3,
    #6a4a9c
  );
}