body {
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background-color: #f8f9fa;
  color: #333;
  padding: 30px;
  max-width: 700px;
  margin: auto;
  line-height: 1.8;
  font-size: 16px;
  position: relative;
}

h1 {
  text-align: center;
  color: #2a6f97;
  margin-bottom: 30px;
}

.container {
  padding: 25px 30px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  position: relative;
}

p {
  font-size: 18px;
  margin: 16px 0;
}

#waitTime {
  font-size: 28px;
  font-weight: bold;
  color: #e55353;
}

#waitingCount,
#workingTeachers {
  font-size: 20px;
  font-weight: bold;
  color: #1c4f6d;
}

input[type="number"],
input[type="text"] {
  width: 180px;
  padding: 6px;
  font-size: 16px;
  margin: 5px 10px 10px 0;
  border: 1px solid #ccc;
  border-radius: 4px;
}

button {
  background-color: #2a6f97;
  color: white;
  padding: 10px 20px;
  margin: 10px 10px 10px 0;
  font-size: 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #1c4f6d;
}

hr {
  margin: 30px 0;
  border: none;
  border-top: 1px solid #ccc;
}

/* 出勤リスト表示 */
.checkbox-list {
  margin-top: 10px;
  padding: 10px;
  padding-left: 15px;
  border: 1px solid #aaa;
  border-radius: 4px;
  background-color: #ffffff;
}

.checkbox-list label {
  display: block;
  margin-bottom: 6px;
  cursor: pointer;
  font-size: 15px;
}

#workingTeachers {
  font-weight: bold;
  color: #007b5e;
  margin-left: 10px;
}

/* 登録済み先生リスト */
.teacher-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid #ddd;
}

.delete-button {
  background-color: #d9534f;
  color: white;
  border: none;
  padding: 6px 10px;
  font-size: 13px;
  border-radius: 4px;
  cursor: pointer;
}

.delete-button:hover {
  background-color: #c9302c;
}

/* 管理用ログイン（右上） */
.top-right {
  position: absolute;
  top: 20px;
  right: 20px;
  text-align: right;
  z-index: 10;
}

.top-right p {
  margin: 0;
  font-size: 14px;
  color: #555;
}

.top-right button {
  margin-top: 4px;
  background-color: #888;
  font-size: 14px;
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  color: white;
  cursor: pointer;
}

.top-right button:hover {
  background-color: #555;
}

@media (max-width: 600px) {
  body {
    padding: 20px;
    font-size: 15px;
  }

  .container {
    padding: 20px;
  }

  #waitTime {
    font-size: 24px;
  }

  #waitingCount,
  #workingTeachers {
    font-size: 18px;
  }

  input[type="number"],
  input[type="text"] {
    width: 100%;
    margin: 5px 0;
  }

  button {
    width: 100%;
    margin: 10px 0;
  }

  .top-right {
    top: 10px;
    right: 10px;
  }
}