/* Modal cảnh báo giới hạn xem bài viết */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 90%;
    margin: 20px;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 20px 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
    margin-bottom: 20px;
}

.modal-header h3 {
    margin: 0;
    color: #333;
    font-size: 18px;
}

.close-modal {
    font-size: 24px;
    cursor: pointer;
    color: #999;
    line-height: 1;
    padding: 0;
    background: none;
    border: none;
}

.close-modal:hover {
    color: #333;
}

.modal-body {
    padding: 0 20px 20px;
}

.modal-body p {
    margin: 10px 0;
    color: #666;
    line-height: 1.6;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid #eee;
    display: flex;
    gap: 10px;
    justify-content: center;
}

.modal-footer .btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background-color: #007cba;
    color: white;
}

.btn-primary:hover {
    background-color: #005a87;
    color: white;
    text-decoration: none;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #545b62;
    color: white;
    text-decoration: none;
}

.btn-outline {
    background-color: transparent;
    color: #666;
    border: 1px solid #ddd;
}

.btn-outline:hover {
    background-color: #f8f9fa;
    color: #666;
    text-decoration: none;
}

/* Thông báo trên trang đăng nhập */
.login-message {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    font-weight: 500;
}

.login-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.login-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

/* Responsive */
@media (max-width: 768px) {
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer .btn {
        text-align: center;
        margin-bottom: 5px;
    }
    
    .modal-content {
        margin: 10px;
        width: calc(100% - 20px);
    }
}

@media (max-width: 480px) {
    .modal-header {
        padding: 15px 15px 0;
    }
    
    .modal-body {
        padding: 0 15px 15px;
    }
    
    .modal-footer {
        padding: 15px;
    }
    
    .modal-header h3 {
        font-size: 16px;
    }
}