* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: 'Arial', sans-serif;
    background-color: gainsboro;
    display: flex;
    justify-content: center;
    align-items: center;
}

main {
    width: 100%;
    max-width: 400px;
    background-color: #fff;
    padding: 20px 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.logo {
    width: 70%;
    height: auto;
    margin-bottom: 20px;
}

form {
    width: 100%;
}

form label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
    text-align: left;
    color: #333;
}

form input[type="email"],
form input[type="password"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

form input[type="email"]:focus,
form input[type="password"]:focus {
    border-color: #007bff;
    outline: none;
}

form button {
    width: 100%;
    padding: 10px;
    background-color: orange;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-top: 12px;
}

form button:hover {
    background-color: darkorange;
}

p {
    font-size: 0.8rem;
    color: #666;
    margin-top: 15px;
    line-height: 1.5;
}

p a {
    color:#007bff;
    text-decoration: none;
}

p a:hover {
    text-decoration: underline;
}

/* アラートメッセージのスタイル */
.alert {
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 5px;
    font-size: 1rem;
    text-align: left;
}

.alert-danger {
    color: #d32f2f;
    background: #ffeaea;
    border: 1px solid #f5c2c7;
}

.alert-success {
    color: #218838;
    background: #eaffea;
    border: 1px solid #b7e4c7;
}