/**
 * Responsive Form Elements
 * Mobile-optimized form inputs, labels, and layouts
 */

/* ============================================
   Form Groups
   ============================================ */

.form-group {
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-700, #374151);
    font-size: 0.875rem;
}

.form-group label.required::after {
    content: ' *';
    color: var(--red-500, #ef4444);
}

/* ============================================
   Form Controls
   ============================================ */

/* Mobile: Touch-friendly inputs (minimum 44px height) */
.form-control,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-300, #d1d5db);
    border-radius: 6px;
    font-size: 1rem; /* 16px to prevent zoom on iOS */
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    min-height: 44px;
    background: var(--white, #ffffff);
    color: var(--gray-900, #111827);
}

.form-control:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color, #6366f1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control:disabled,
input:disabled,
select:disabled,
textarea:disabled {
    background: var(--gray-100, #f3f4f6);
    color: var(--gray-500, #6b7280);
    cursor: not-allowed;
}

/* Textarea specific */
textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

/* ============================================
   Form Rows (Responsive Grid)
   ============================================ */

/* Mobile: Single column */
.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

/* Tablet and up: Two columns */
@media (min-width: 768px) {
    .form-row {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-row .form-group.full-width {
        grid-column: 1 / -1;
    }
}

/* ============================================
   Select Dropdowns
   ============================================ */

select.form-control {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23374151' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 12px;
    padding-right: 2.5rem;
}

/* Native mobile picker on touch devices */
@media (hover: none) {
    select.form-control {
        /* Use native picker on mobile */
        appearance: auto;
        -webkit-appearance: menulist;
        background-image: none;
        padding-right: 0.75rem;
    }
}

/* ============================================
   Checkboxes and Radio Buttons
   ============================================ */

/* Touch-friendly checkboxes and radios */
.form-check {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    min-height: 44px;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
    margin: 0;
    cursor: pointer;
}

.form-check label {
    margin: 0;
    cursor: pointer;
    font-weight: 400;
    flex: 1;
}

/* ============================================
   Input Groups (with icons/buttons)
   ============================================ */

.input-group {
    display: flex;
    width: 100%;
}

.input-group .form-control {
    flex: 1;
    border-radius: 6px 0 0 6px;
}

.input-group-append {
    display: flex;
}

.input-group-append button,
.input-group-append .btn {
    border-radius: 0 6px 6px 0;
    min-width: 44px;
    min-height: 44px;
}

/* Mobile: Stack input groups if needed */
@media (max-width: 639px) {
    .input-group.stack-mobile {
        flex-direction: column;
    }
    
    .input-group.stack-mobile .form-control {
        border-radius: 6px 6px 0 0;
    }
    
    .input-group.stack-mobile .input-group-append button {
        border-radius: 0 0 6px 6px;
        width: 100%;
    }
}

/* ============================================
   Form Validation States
   ============================================ */

.form-control.is-invalid,
input.is-invalid,
select.is-invalid,
textarea.is-invalid {
    border-color: var(--red-500, #ef4444);
}

.form-control.is-invalid:focus,
input.is-invalid:focus,
select.is-invalid:focus,
textarea.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-control.is-valid,
input.is-valid,
select.is-valid,
textarea.is-valid {
    border-color: var(--green-500, #10b981);
}

.form-control.is-valid:focus,
input.is-valid:focus,
select.is-valid:focus,
textarea.is-valid:focus {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Validation feedback */
.invalid-feedback,
.valid-feedback {
    display: none;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.invalid-feedback {
    color: var(--red-600, #dc2626);
}

.valid-feedback {
    color: var(--green-600, #16a34a);
}

.form-control.is-invalid ~ .invalid-feedback,
input.is-invalid ~ .invalid-feedback,
select.is-invalid ~ .invalid-feedback,
textarea.is-invalid ~ .invalid-feedback {
    display: block;
}

.form-control.is-valid ~ .valid-feedback,
input.is-valid ~ .valid-feedback,
select.is-valid ~ .valid-feedback,
textarea.is-valid ~ .valid-feedback {
    display: block;
}

/* ============================================
   Form Help Text
   ============================================ */

.form-text {
    font-size: 0.875rem;
    color: var(--gray-600, #4b5563);
    margin-top: 0.25rem;
}

/* ============================================
   File Upload
   ============================================ */

input[type="file"] {
    padding: 0.5rem;
    min-height: 44px;
}

input[type="file"]::file-selector-button {
    padding: 0.5rem 1rem;
    margin-right: 1rem;
    background: var(--gray-100, #f3f4f6);
    border: 1px solid var(--gray-300, #d1d5db);
    border-radius: 6px;
    cursor: pointer;
    min-height: 36px;
}

input[type="file"]::file-selector-button:hover {
    background: var(--gray-200, #e5e7eb);
}

/* ============================================
   Range Inputs
   ============================================ */

input[type="range"] {
    width: 100%;
    min-height: 44px;
    padding: 0;
}

/* ============================================
   Search Inputs
   ============================================ */

input[type="search"] {
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%236b7280' d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
}

/* ============================================
   Date and Time Inputs
   ============================================ */

/* Use native mobile pickers */
input[type="date"],
input[type="time"],
input[type="datetime-local"] {
    /* Native pickers are already optimized for mobile */
}

/* ============================================
   Form Spacing
   ============================================ */

/* Adequate spacing between form fields on mobile */
.form-group + .form-group {
    margin-top: 1rem;
}

@media (min-width: 768px) {
    .form-group + .form-group {
        margin-top: 0;
    }
}

/* ============================================
   Inline Forms
   ============================================ */

/* Mobile: Stack inline forms */
.form-inline {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Desktop: Horizontal layout */
@media (min-width: 768px) {
    .form-inline {
        flex-direction: row;
        align-items: flex-end;
    }
    
    .form-inline .form-group {
        margin-bottom: 0;
        flex: 1;
    }
    
    .form-inline button {
        flex-shrink: 0;
    }
}

/* ============================================
   Multi-Select
   ============================================ */

select[multiple] {
    min-height: 120px;
    padding: 0.5rem;
}

select[multiple] option {
    padding: 0.5rem;
    min-height: 44px;
}

/* ============================================
   Form Buttons
   ============================================ */

.form-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
    flex-direction: column;
}

.form-actions button {
    width: 100%;
    min-height: 44px;
}

@media (min-width: 768px) {
    .form-actions {
        flex-direction: row;
        justify-content: flex-end;
    }
    
    .form-actions button {
        width: auto;
    }
}