/* === 共通スタイル === */
.login-container,
.signup-container {
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.2);
    padding: 20px;
    border-radius: 10px;
    width: 800px;
    margin: 50px auto;
}

.login-container {
    background-color: #e5f5ff;
}

.signup-container {
    background-color: #e9ffe9;
}

.form_title {
    font-size: 45px;
    margin-top: 30px;
}

.form_text {
    font-size: 25px;
    margin-top: 50px;
}

.user_form p {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-left: 200px;
}

.textbox {
    width: 400px;
    height: 40px;
    font-size: 20px;
    background-color: #fff;
    border: none;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    outline: none;
    box-sizing: border-box;
    margin-top: 5px;
}

.user_form input[type="submit"] {
    color: white;
    font-size: 20px;
    width: 200px;
    height: 40px;
    cursor: pointer;
    border: none;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.2);
    transition: background-color 0.3s, transform 0.2s;
    margin: 80px 0 50px 100px;
}

.user_form input[type="submit"][value="ログイン"] {
    background-color: #007bff;
}
.user_form input[type="submit"][value="ログイン"]:hover {
    background-color: #005bff;
    transform: scale(1.01);
}

.user_form input[type="submit"][value="新規登録"] {
    background-color: #28a745;
}
.user_form input[type="submit"][value="新規登録"]:hover {
    background-color: #00c42b;
    box-shadow: 0px 0px 10px #00c42b;
    transform: scale(1.01);
}

.user_form .form_err,
.user_form .login_err,
.user_form .signup_err,
.user_form .msg_err {
    color: red;
    font-size: 14px;
}

.user_form .login_err {
    margin-left: 265px;
}

.user_form .signup_err {
    margin-left: 340px;
}

.user_form .msg_err {
    margin-left: 310px;
}

/* === メディアクエリ === */

/* タブレット（768px〜1024px） */
@media screen and (min-width: 768px) and (max-width: 1024px) {
    .login-container,
    .signup-container {
        width: 600px;
    }

    .form_title {
        font-size: 40px;
        margin-top: 20px;
    }

    .form_text {
        font-size: 22px;
        margin-top: 30px;
    }

    .user_form p {
        margin-left: 100px;
    }

    .user_form input[type="submit"] {
        margin-left: 100px;
        margin-top: 60px;
        margin-bottom: 40px;
    }

    .user_form .form_err { font-size: 12px; }
    .user_form .login_err { font-size: 12px; margin-left: 185px; }
    .user_form .signup_err { font-size: 12px; margin-left: 250px; }
    .user_form .msg_err { font-size: 12px; margin-left: 220px; }
}

/* スマホ中サイズ（480px〜767px） */
@media screen and (min-width: 480px) and (max-width: 767px) {
    .login-container,
    .signup-container {
        width: 400px;
        margin: 40px auto;
    }

    .form_title {
        font-size: 28px;
        margin-top: 12px;
    }

    .form_text {
        font-size: 16px;
        margin-top: 20px;
    }

    .user_form p {
        margin-left: 50px;
    }

    .textbox {
        width: 310px;
        height: 35px;
        font-size: 15px;
        margin-top: 2px;
    }

    .user_form input[type="submit"] {
        font-size: 16px;
        width: 150px;
        height: 30px;
        margin-left: 75px;
        margin-top: 40px;
        margin-bottom: 20px;
    }

    .user_form .form_err { font-size: 10px; }
    .user_form .login_err { font-size: 10px; margin-left: 105px; }
    .user_form .signup_err { font-size: 10px; margin-left: 160px; }
    .user_form .msg_err { font-size: 10px; margin-left: 140px; }
}

/* スマホ小サイズ（〜479px） */
@media screen and (max-width: 479px) {
    .login-container,
    .signup-container {
        width: 250px;
        margin: 30px auto;
    }

    .form_title {
        font-size: 20px;
        margin-top: 12px;
    }

    .form_text {
        font-size: 12px;
        margin-top: 16px;
    }

    .user_form p {
        margin-left: 20px;
    }

    .textbox {
        width: 210px;
        height: 20px;
        font-size: 10px;
        margin-top: 2px;
    }

    .user_form input[type="submit"] {
        font-size: 12px;
        width: 100px;
        height: 25px;
        margin-left: 60px;
        margin-top: 30px;
        margin-bottom: 10px;
    }

    .user_form .form_err { font-size: 8px; }
    .user_form .login_err { font-size: 8px; margin-left: 50px; }
    .user_form .signup_err { font-size: 8px; margin-left: 93px; }
    .user_form .msg_err { font-size: 8px; margin-left: 75px; }
}