/**
 * Form Validation Enhancements
 * Improved error states, required field indicators, and validation feedback
 */

/* Required Field Indicators */
.form-label.required::after,
label.required::after {
    content: " *";
    color: #dc3545;
    font-weight: bold;
}

/* Error Input Styling */
.error_input,
.form-control.is-invalid,
.form-select.is-invalid,
input.is-invalid,
textarea.is-invalid,
select.is-invalid {
    border-color: #dc3545 !important;
    background-color: #fff5f5 !important;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1) !important;
}

.error_input:focus,
.form-control.is-invalid:focus,
.form-select.is-invalid:focus {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.25) !important;
}

/* Valid Input Styling */
.form-control.is-valid,
.form-select.is-valid,
input.is-valid,
textarea.is-valid,
select.is-valid {
    border-color: #28a745 !important;
    background-color: #f0fff4 !important;
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1) !important;
}

.form-control.is-valid:focus,
.form-select.is-valid:focus {
    border-color: #28a745 !important;
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.25) !important;
}

/* Inline Error Messages */
.invalid-feedback {
    display: block;
    width: 100%;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: #dc3545;
    font-weight: 500;
}

.valid-feedback {
    display: block;
    width: 100%;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: #28a745;
    font-weight: 500;
}

/* Error Icon */
.form-control.is-invalid ~ .invalid-feedback::before,
.error_input ~ .invalid-feedback::before {
    content: "\f06a"; /* Font Awesome exclamation-circle */
    font-family: "FontAwesome";
    margin-right: 0.5rem;
}

/* Success Icon */
.form-control.is-valid ~ .valid-feedback::before {
    content: "\f00c"; /* Font Awesome check */
    font-family: "FontAwesome";
    margin-right: 0.5rem;
}

/* Input Group Error States */
.input-group .form-control.is-invalid {
    border-left-color: #dc3545 !important;
}

.input-group .form-control.is-valid {
    border-left-color: #28a745 !important;
}

/* Checkbox and Radio Error States */
.form-check-input.is-invalid {
    border-color: #dc3545;
}

.form-check-input.is-invalid:checked {
    background-color: #dc3545;
    border-color: #dc3545;
}

.form-check-input.is-valid {
    border-color: #28a745;
}

.form-check-input.is-valid:checked {
    background-color: #28a745;
    border-color: #28a745;
}

/* Alert Enhancements */
.alert {
    border-left-width: 4px;
    border-left-style: solid;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    display: flex;
    align-items: flex-start;
}

.alert-danger {
    background-color: #fff5f5;
    border-left-color: #dc3545;
    color: #721c24;
}

.alert-success {
    background-color: #f0fff4;
    border-left-color: #28a745;
    color: #155724;
}

.alert-warning {
    background-color: #fffbf0;
    border-left-color: #FFD700;
    color: #856404;
}

.alert-info {
    background-color: #f0f9ff;
    border-left-color: #17a2b8;
    color: #0c5460;
}

.alert i {
    margin-right: 0.75rem;
    font-size: 1.25rem;
    margin-top: 0.125rem;
}

/* Form Field Help Text */
.form-text {
    font-size: 0.875rem;
    color: #6c757d;
    margin-top: 0.5rem;
}

.form-text.help-text {
    display: flex;
    align-items: center;
}

.form-text.help-text::before {
    content: "\f05a"; /* Font Awesome info-circle */
    font-family: "FontAwesome";
    margin-right: 0.5rem;
    color: #6c757d;
}

/* Loading State for Forms */
.form-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.form-loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 3px solid #FFD700;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Submit Button Loading State */
.btn-loading {
    position: relative;
    pointer-events: none;
    color: transparent !important;
}

.btn-loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 3px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .invalid-feedback,
    .valid-feedback {
        font-size: 0.8rem;
    }
    
    .alert {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
    }
    
    .form-label.required::after {
        font-size: 1.2em;
    }
}

/* Accessibility: Focus States */
.form-control:focus,
.form-select:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid #FFD700;
    outline-offset: 2px;
}

.form-control.is-invalid:focus,
.form-select.is-invalid:focus {
    outline-color: #dc3545;
}

.form-control.is-valid:focus,
.form-select.is-valid:focus {
    outline-color: #28a745;
}