/* 認証ページ共通 */
.auth-container {
    max-width: 400px;
    margin: 80px auto;
    padding: 0 20px;
    text-align: center;
}

.auth-container h1 {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 32px;
}

.auth-box {
    background: #fff;
    padding: 32px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    text-align: left;
}

.auth-box h2 {
    background: center;
    margin-bottom: 24px;
    color: #2c3e50;
}

.auth-box button {
    width: 100%;
    padding: 12px;
    background-color: #3498db;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 8px;
}

.auth-box button:hover {
    background-color: #2980b9;
}

.auth-link {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    color: #888;
}

.auth-link a {
    color: #3498db;
    text-decoration: none;
}

.auth-link a:hover {
    text-decoration: underline;
}

.error-message {
    color: #e74c3c;
    font-size: 14px;
    margin-top: 8px;
    text-align: center;
}

.success-message {
    color: #27ae60;
    font-size: 14px;
    margin-top: 8px;
    text-align: center;
}