*{
  margin: 0;
  padding: 0;
}


body {
  font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background-color: #f4f6f8;
  color: #333;
}

/* ナビゲーション */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background-color: #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.logo {
  height: 40px;
}

.nav-text {
  font-size: 18px;
  font-weight: bold;
  color: #2c3e50;
}

/* ログインフォーム */
.login-container {
  max-width: 400px;
  margin: 60px auto;
  background: white;
  padding: 30px 40px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.login-container h2 {
  text-align: center;
  margin-bottom: 25px;
  color: #2c3e50;
}

label {
  display: block;
  margin-bottom: 20px;
  font-size: 15px;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 14px;
}

button {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  background-color: #e53935;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

button:hover {
  background-color: #e53935;
}

.error {
  color: red;
  text-align: center;
  margin-bottom: 15px;
  font-size: 14px;
}


.forgot-password {
  text-align: center;
  margin-top: 15px;
}

.forgot-password a {
  color: #e53935;
  text-decoration: none;
  font-size: 14px;
}

.forgot-password a:hover {
  text-decoration: underline;
}


@media (max-width: 768px) {
  .login-container {
    max-width: 300px;       /* 適度な最大幅を指定 */
    margin: 20px auto;      /* 左右中央 & 上下余白 */
    padding: 24px 20px;     /* 内側に余白をつける */
    border-radius: 10px;
  }

  .login-container h2 {
    font-size: 20px;
    margin-bottom: 20px;
  }

  label {
    font-size: 14px;
  }

  input[type="text"],
  input[type="password"] {
    width: 90%;           /* ← 横幅を90%に調整 */
    font-size: 16px;
    padding: 12px;
  }

  button {
    font-size: 16px;
    padding: 14px;
  }

  .forgot-password a {
    font-size: 13px;
  }
}