@charset "utf-8";

/* 共通スタイル */
body {
  font-family: sans-serif;
  background: #f5f5f5;
  padding: 40px;
}

.login-box {
  background: #fff;
  padding: 30px;
  max-width: 400px;
  margin: auto;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  border-radius: 8px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

button {
  width: 100%;
  padding: 10px;
  background: #4CAF50;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background: #388E3C;
}

.error {
  color: red;
  text-align: center;
  margin-bottom: 10px;
}

/* モバイル用スタイル */
@media screen and (max-width: 480px) {
  body {
    padding: 10px;
    margin: 0;
  }

  .login-box {
    width: 100%;
    max-width: none;
    padding: 20px;
    margin: 40px auto;
    box-sizing: border-box;
    border-radius: 0;
    box-shadow: none;
  }

  h2 {
    font-size: 20px;
    text-align: center;
    margin-bottom: 20px;
  }

  label {
    font-size: 14px;
  }

  input[type="text"],
  input[type="password"] {
    padding: 12px;
    font-size: 16px;
    box-sizing: border-box;
    display: block;
  }

  button {
    padding: 14px;
    font-size: 16px;
    margin-top: 10px;
  }

  .error {
    background: #ffe5e5;
    padding: 10px;
    border-radius: 4px;
    font-size: 14px;
    margin-bottom: 15px;
    color: red;
    text-align: center;
  }
}