/* Subtle Form Validation Styles */

/* Base validation styles */
.form-control.is-invalid {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.15);
}

.form-control.is-valid {
    border-color: #28a745;
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.15);
}

/* Feedback messages */
.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 12px;
    color: #dc3545;
    opacity: 0.8;
    font-style: italic;
    line-height: 1.2;
}

.valid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 12px;
    color: #28a745;
    opacity: 0.8;
    font-style: italic;
    line-height: 1.2;
}

/* Show feedback only when needed */
.form-control.is-invalid ~ .invalid-feedback {
    display: block;
}

.form-control.is-valid ~ .valid-feedback {
    display: block;
}

/* Input group styling */
.input-group {
    position: relative;
    margin-bottom: 1rem;
}

.input-group .form-control {
    transition: all 0.2s ease-in-out;
}

.input-group .form-control:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.15);
}

.input-group .form-control.is-invalid:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.15);
}

.input-group .form-control.is-valid:focus {
    border-color: #28a745;
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.15);
}

/* Smooth transitions */
.form-control {
    transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.invalid-feedback,
.valid-feedback {
    transition: opacity 0.3s ease-in-out, display 0.3s ease-in-out;
}

/* Mobile responsive adjustments */
@media (max-width: 767px) {
    .invalid-feedback,
    .valid-feedback {
        font-size: 11px;
        margin-top: 0.2rem;
    }
    
    .input-group {
        margin-bottom: 0.8rem;
    }
}

/* Tablet adjustments */
@media (min-width: 768px) and (max-width: 1023px) {
    .invalid-feedback,
    .valid-feedback {
        font-size: 11px;
    }
}

/* Desktop adjustments */
@media (min-width: 1024px) {
    .invalid-feedback,
    .valid-feedback {
        font-size: 12px;
    }
}

/* Hover effects */
.input-group:hover .form-control:not(:focus) {
    border-color: #ced4da;
}

.input-group:hover .form-control.is-invalid:not(:focus) {
    border-color: #dc3545;
}

.input-group:hover .form-control.is-valid:not(:focus) {
    border-color: #28a745;
}

/* Success and error icons */
.input-group .form-control.is-valid {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.input-group .form-control.is-invalid {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23dc3545' viewBox='-2 -2 7 7'%3e%3cpath stroke='%23dc3545' d='M0 0l3 3m0-3L0 3'/%3e%3ccircle r='.5'/%3e%3ccircle cx='3' r='.5'/%3e%3ccircle cy='3' r='.5'/%3e%3ccircle cx='3' cy='3' r='.5'/%3e%3c/svg%3E");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

/* Focus states */
.input-group .form-control:focus {
    outline: 0;
}

/* Disabled state */
.input-group .form-control:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

/* Readonly state */
.input-group .form-control[readonly] {
    background-color: #e9ecef;
    opacity: 1;
}

/* Placeholder styling */
.input-group .form-control::placeholder {
    color: #6c757d;
    opacity: 0.7;
}

.input-group .form-control:focus::placeholder {
    opacity: 0.5;
}

/* Input group append/prepend styling */
.input-group-append .input-group-text,
.input-group-prepend .input-group-text {
    border-color: #ced4da;
    background-color: #f8f9fa;
    color: #495057;
    transition: border-color 0.2s ease-in-out;
}

.input-group .form-control:focus + .input-group-append .input-group-text,
.input-group .form-control:focus + .input-group-prepend .input-group-text {
    border-color: #80bdff;
}

.input-group .form-control.is-invalid + .input-group-append .input-group-text,
.input-group .form-control.is-invalid + .input-group-prepend .input-group-text {
    border-color: #dc3545;
}

.input-group .form-control.is-valid + .input-group-append .input-group-text,
.input-group .form-control.is-valid + .input-group-prepend .input-group-text {
    border-color: #28a745;
}