/* 注册页面样式 */
.is-valid {
    border-color: #28a745 !important;
}

.is-invalid {
    border-color: #dc3545 !important;
}

.text-success {
    color: #28a745 !important;
}

.text-danger {
    color: #dc3545 !important;
}

/* 验证码按钮样式 */
.btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 表单增强样式 */
.form-text {
    font-size: 0.875em;
    margin-top: 0.25rem;
}

.input-group .btn {
    border-left: 0;
}

.input-group .form-control:focus + .btn {
    border-color: #86b7fe;
}