/* ==========================================================================
   CarePDF - Unified Form Components
   Consistent styling for inputs, checkboxes, radio buttons, and form elements
   Used across entire project for consistent UI
   ========================================================================== */

/* ==========================================================================
   CSS Variables for Form Components
   ========================================================================== */
:root {
    /* Form Colors */
    --form-primary: #e74c3c;
    --form-primary-hover: #c0392b;
    --form-primary-light: rgba(231, 76, 60, 0.1);
    --form-primary-focus: rgba(231, 76, 60, 0.15);
    
    --form-success: #10b981;
    --form-success-light: rgba(16, 185, 129, 0.1);
    --form-error: #ef4444;
    --form-error-light: rgba(239, 68, 68, 0.1);
    --form-warning: #f59e0b;
    --form-warning-light: rgba(245, 158, 11, 0.1);
    
    /* Form Sizes */
    --form-input-height: 48px;
    --form-input-height-sm: 40px;
    --form-input-height-lg: 56px;
    --form-input-padding: 0.875rem 1rem;
    --form-input-padding-icon: 0.875rem 1rem 0.875rem 2.75rem;
    
    /* Form Spacing */
    --form-gap: 1.5rem;
    --form-gap-sm: 1rem;
    --form-label-gap: 0.5rem;
    
    /* Form Border & Radius */
    --form-border-width: 2px;
    --form-radius: 0.75rem;
    --form-radius-sm: 0.5rem;
    --form-radius-lg: 1rem;
    
    /* Form Typography */
    --form-font-size: 1rem;
    --form-font-size-sm: 0.875rem;
    --form-label-size: 0.875rem;
    --form-help-size: 0.75rem;
    
    /* Form Colors - Light Mode */
    --form-bg: #f9fafb;
    --form-bg-focus: #ffffff;
    --form-border: #e5e7eb;
    --form-border-hover: #d1d5db;
    --form-text: #111827;
    --form-placeholder: #9ca3af;
    --form-label: #374151;
    --form-help: #6b7280;
    --form-icon: #9ca3af;
    --form-icon-focus: #e74c3c;
    
    /* Transition */
    --form-transition: all 0.2s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --form-bg: #374151;
    --form-bg-focus: #374151;
    --form-border: #4b5563;
    --form-border-hover: #6b7280;
    --form-text: #f3f4f6;
    --form-placeholder: #6b7280;
    --form-label: #d1d5db;
    --form-help: #9ca3af;
    --form-icon: #6b7280;
}

/* ==========================================================================
   1. Form Groups & Labels
   ========================================================================== */

/* Form Group Container */
.form-group {
    margin-bottom: var(--form-gap);
}

.form-group--sm {
    margin-bottom: var(--form-gap-sm);
}

.form-group--inline {
    display: flex;
    align-items: center;
    gap: var(--form-gap-sm);
}

/* Form Row - Multiple fields side by side */
.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--form-gap-sm);
}

.form-row--3 {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
    .form-row,
    .form-row--3 {
        grid-template-columns: 1fr;
    }
}

/* Labels */
.form-label {
    display: block;
    font-size: var(--form-label-size);
    font-weight: 500;
    color: var(--form-label);
    margin-bottom: var(--form-label-gap);
    line-height: 1.4;
}

.form-label--required::after {
    content: ' *';
    color: var(--form-error);
}

.form-label .required {
    color: var(--form-error);
    font-weight: 400;
}

/* Help Text */
.form-help {
    display: block;
    font-size: var(--form-help-size);
    color: var(--form-help);
    margin-top: var(--form-label-gap);
    line-height: 1.5;
}

/* Error Text */
.form-error {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: var(--form-help-size);
    color: var(--form-error);
    margin-top: var(--form-label-gap);
}

.form-error::before {
    content: '';
    width: 14px;
    height: 14px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ef4444' stroke-width='2'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cline x1='12' y1='8' x2='12' y2='12'/%3E%3Cline x1='12' y1='16' x2='12.01' y2='16'/%3E%3C/svg%3E") center/contain no-repeat;
    flex-shrink: 0;
}

/* Success Text */
.form-success {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: var(--form-help-size);
    color: var(--form-success);
    margin-top: var(--form-label-gap);
}

.form-success::before {
    content: '';
    width: 14px;
    height: 14px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2310b981' stroke-width='2'%3E%3Cpath d='M22 11.08V12a10 10 0 1 1-5.93-9.14'/%3E%3Cpolyline points='22 4 12 14.01 9 11.01'/%3E%3C/svg%3E") center/contain no-repeat;
    flex-shrink: 0;
}

/* ==========================================================================
   2. Text Inputs & Textareas
   ========================================================================== */

/* Base Input Styles */
.form-input {
    width: 100%;
    height: var(--form-input-height);
    padding: var(--form-input-padding);
    font-size: var(--form-font-size);
    font-family: inherit;
    color: var(--form-text);
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: var(--form-radius);
    transition: var(--form-transition);
    outline: none;
}

.form-input::placeholder {
    color: var(--form-placeholder);
}

.form-input:hover {
    border-color: var(--form-border-hover);
}

.form-input:focus {
    background: var(--form-bg-focus);
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.form-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--form-border);
}

/* Input Sizes */
.form-input--sm {
    height: var(--form-input-height-sm);
    font-size: var(--form-font-size-sm);
    padding: 0.5rem 0.75rem;
    border-radius: var(--form-radius-sm);
}

.form-input--lg {
    height: var(--form-input-height-lg);
    font-size: 1.125rem;
    padding: 1rem 1.25rem;
}

/* Input States */
.form-input--error {
    border-color: var(--form-error);
    background: var(--form-error-light);
}

.form-input--error:focus {
    border-color: var(--form-error);
    box-shadow: 0 0 0 4px var(--form-error-light);
}

.form-input--success {
    border-color: var(--form-success);
    background: var(--form-success-light);
}

.form-input--success:focus {
    border-color: var(--form-success);
    box-shadow: 0 0 0 4px var(--form-success-light);
}

/* Textarea */
.form-textarea {
    min-height: 120px;
    height: auto;
    resize: vertical;
    line-height: 1.6;
}

/* ==========================================================================
   3. Input with Icon
   ========================================================================== */

.form-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

/* Left Icon */
.form-input-wrapper .form-icon {
    position: absolute;
    left: 1rem;
    color: var(--form-icon);
    pointer-events: none;
    z-index: 1;
    transition: var(--form-transition);
    width: 20px;
    height: 20px;
}

.form-input-wrapper .form-input--has-icon {
    padding-left: 2.75rem;
}

.form-input-wrapper:focus-within .form-icon {
    color: var(--form-icon-focus);
}

/* Right Icon / Action Button */
.form-input-action {
    position: absolute;
    right: 0.5rem;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--form-icon);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--form-transition);
    border-radius: var(--form-radius-sm);
}

.form-input-action:hover {
    color: var(--form-text);
    background: var(--form-border);
}

.form-input-action svg {
    width: 20px;
    height: 20px;
}

/* ==========================================================================
   4. Custom Checkbox
   ========================================================================== */

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    font-size: var(--form-font-size-sm);
    color: var(--form-label);
    line-height: 1.5;
    user-select: none;
}

.form-checkbox input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    min-width: 20px;
    margin: 0;
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--form-transition);
    position: relative;
    flex-shrink: 0;
}

.form-checkbox input[type="checkbox"]:hover {
    border-color: var(--form-border-hover);
}

.form-checkbox input[type="checkbox"]:focus {
    outline: none;
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.form-checkbox input[type="checkbox"]:checked {
    background: var(--form-primary);
    border-color: var(--form-primary);
}

.form-checkbox input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 11px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.form-checkbox input[type="checkbox"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-checkbox input[type="checkbox"]:disabled + span {
    opacity: 0.5;
}

/* Checkbox Sizes */
.form-checkbox--sm input[type="checkbox"] {
    width: 16px;
    height: 16px;
    min-width: 16px;
    border-radius: 4px;
}

.form-checkbox--sm input[type="checkbox"]:checked::after {
    left: 5px;
    top: 1px;
    width: 5px;
    height: 9px;
}

.form-checkbox--lg input[type="checkbox"] {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border-radius: 8px;
}

.form-checkbox--lg input[type="checkbox"]:checked::after {
    left: 7px;
    top: 3px;
    width: 7px;
    height: 13px;
}

/* Checkbox Group */
.form-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--form-gap-sm);
}

.form-checkbox-group--inline {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--form-gap);
}

/* ==========================================================================
   5. Custom Radio Button
   ========================================================================== */

.form-radio {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    font-size: var(--form-font-size-sm);
    color: var(--form-label);
    line-height: 1.5;
    user-select: none;
}

.form-radio input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    min-width: 20px;
    margin: 0;
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--form-transition);
    position: relative;
    flex-shrink: 0;
}

.form-radio input[type="radio"]:hover {
    border-color: var(--form-border-hover);
}

.form-radio input[type="radio"]:focus {
    outline: none;
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.form-radio input[type="radio"]:checked {
    border-color: var(--form-primary);
    background: var(--form-bg-focus);
}

.form-radio input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 10px;
    height: 10px;
    background: var(--form-primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.form-radio input[type="radio"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-radio input[type="radio"]:disabled + span {
    opacity: 0.5;
}

/* Radio Sizes */
.form-radio--sm input[type="radio"] {
    width: 16px;
    height: 16px;
    min-width: 16px;
}

.form-radio--sm input[type="radio"]:checked::after {
    width: 8px;
    height: 8px;
}

.form-radio--lg input[type="radio"] {
    width: 24px;
    height: 24px;
    min-width: 24px;
}

.form-radio--lg input[type="radio"]:checked::after {
    width: 12px;
    height: 12px;
}

/* Radio Group */
.form-radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--form-gap-sm);
}

.form-radio-group--inline {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--form-gap);
}

/* ==========================================================================
   6. Radio Card (Box Style Radio)
   ========================================================================== */

.form-radio-card {
    position: relative;
}

.form-radio-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.form-radio-card-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--form-bg-focus);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: var(--form-radius);
    cursor: pointer;
    transition: var(--form-transition);
}

.form-radio-card-label:hover {
    border-color: var(--form-border-hover);
    background: var(--form-bg);
}

.form-radio-card input[type="radio"]:focus + .form-radio-card-label {
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.form-radio-card input[type="radio"]:checked + .form-radio-card-label {
    border-color: var(--form-primary);
    background: var(--form-primary-light);
}

.form-radio-card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--form-bg);
    border-radius: var(--form-radius-sm);
    color: var(--form-icon);
    flex-shrink: 0;
    transition: var(--form-transition);
}

.form-radio-card input[type="radio"]:checked + .form-radio-card-label .form-radio-card-icon {
    background: var(--form-primary);
    color: white;
}

.form-radio-card-content {
    flex: 1;
}

.form-radio-card-title {
    font-size: var(--form-font-size-sm);
    font-weight: 600;
    color: var(--form-text);
    margin-bottom: 0.25rem;
}

.form-radio-card-desc {
    font-size: var(--form-help-size);
    color: var(--form-help);
    line-height: 1.4;
}

/* Radio Cards Grid */
.form-radio-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--form-gap-sm);
}

/* ==========================================================================
   7. Toggle Switch
   ========================================================================== */

.form-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: var(--form-font-size-sm);
    color: var(--form-label);
    user-select: none;
}

.form-toggle input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 44px;
    height: 24px;
    background: var(--form-border);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--form-transition);
    position: relative;
    flex-shrink: 0;
}

.form-toggle input[type="checkbox"]::after {
    content: '';
    position: absolute;
    left: 2px;
    top: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: var(--form-transition);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.form-toggle input[type="checkbox"]:hover {
    background: var(--form-border-hover);
}

.form-toggle input[type="checkbox"]:focus {
    outline: none;
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.form-toggle input[type="checkbox"]:checked {
    background: var(--form-primary);
}

.form-toggle input[type="checkbox"]:checked::after {
    left: 22px;
}

.form-toggle input[type="checkbox"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Toggle Sizes */
.form-toggle--sm input[type="checkbox"] {
    width: 36px;
    height: 20px;
}

.form-toggle--sm input[type="checkbox"]::after {
    width: 16px;
    height: 16px;
}

.form-toggle--sm input[type="checkbox"]:checked::after {
    left: 18px;
}

.form-toggle--lg input[type="checkbox"] {
    width: 56px;
    height: 30px;
    border-radius: 15px;
}

.form-toggle--lg input[type="checkbox"]::after {
    width: 26px;
    height: 26px;
}

.form-toggle--lg input[type="checkbox"]:checked::after {
    left: 28px;
}

/* ==========================================================================
   8. Select Dropdown
   ========================================================================== */

.form-select {
    width: 100%;
    height: var(--form-input-height);
    padding: var(--form-input-padding);
    padding-right: 2.5rem;
    font-size: var(--form-font-size);
    font-family: inherit;
    color: var(--form-text);
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: var(--form-radius);
    transition: var(--form-transition);
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 20px;
}

.form-select:hover {
    border-color: var(--form-border-hover);
}

.form-select:focus {
    background-color: var(--form-bg-focus);
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.form-select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

[data-theme="dark"] .form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
}

/* Select Sizes */
.form-select--sm {
    height: var(--form-input-height-sm);
    font-size: var(--form-font-size-sm);
    padding: 0.5rem 2rem 0.5rem 0.75rem;
}

.form-select--lg {
    height: var(--form-input-height-lg);
    font-size: 1.125rem;
    padding: 1rem 2.5rem 1rem 1.25rem;
}

/* ==========================================================================
   9. Number Input with Stepper
   ========================================================================== */

.form-number-wrapper {
    display: flex;
    align-items: center;
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: var(--form-radius);
    overflow: hidden;
    transition: var(--form-transition);
}

.form-number-wrapper:hover {
    border-color: var(--form-border-hover);
}

.form-number-wrapper:focus-within {
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.form-number-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--form-icon);
    transition: var(--form-transition);
}

.form-number-btn:hover {
    background: var(--form-border);
    color: var(--form-text);
}

.form-number-btn:active {
    background: var(--form-primary);
    color: white;
}

.form-number-input {
    flex: 1;
    height: 44px;
    padding: 0 0.5rem;
    text-align: center;
    font-size: var(--form-font-size);
    font-family: inherit;
    color: var(--form-text);
    background: transparent;
    border: none;
    outline: none;
    -moz-appearance: textfield;
}

.form-number-input::-webkit-outer-spin-button,
.form-number-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* ==========================================================================
   10. File Input
   ========================================================================== */

.form-file {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.form-file-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--form-bg);
    border: var(--form-border-width) dashed var(--form-border);
    border-radius: var(--form-radius);
    cursor: pointer;
    font-size: var(--form-font-size-sm);
    color: var(--form-label);
    transition: var(--form-transition);
}

.form-file-label:hover {
    border-color: var(--form-primary);
    background: var(--form-primary-light);
}

.form-file-input:focus + .form-file-label {
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.form-file-name {
    font-size: var(--form-font-size-sm);
    color: var(--form-help);
}

/* ==========================================================================
   11. Password Strength Indicator
   ========================================================================== */

.form-password-strength {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: var(--form-label-gap);
}

.form-strength-bar {
    flex: 1;
    height: 4px;
    background: var(--form-border);
    border-radius: 2px;
    overflow: hidden;
}

.form-strength-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.3s ease, background 0.3s ease;
    width: 0%;
}

.form-strength-fill--weak {
    width: 33%;
    background: var(--form-error);
}

.form-strength-fill--medium {
    width: 66%;
    background: var(--form-warning);
}

.form-strength-fill--strong {
    width: 100%;
    background: var(--form-success);
}

.form-strength-label {
    font-size: var(--form-help-size);
    font-weight: 500;
    min-width: 60px;
    text-align: right;
}

.form-strength-label--weak {
    color: var(--form-error);
}

.form-strength-label--medium {
    color: var(--form-warning);
}

.form-strength-label--strong {
    color: var(--form-success);
}

/* ==========================================================================
   12. Form Actions (Buttons Container)
   ========================================================================== */

.form-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--form-gap-sm);
    margin-top: var(--form-gap);
    padding-top: var(--form-gap);
    border-top: 1px solid var(--form-border);
}

.form-actions--start {
    justify-content: flex-start;
}

.form-actions--center {
    justify-content: center;
}

.form-actions--between {
    justify-content: space-between;
}

.form-actions--stacked {
    flex-direction: column;
}

/* ==========================================================================
   13. Form Divider
   ========================================================================== */

.form-divider {
    display: flex;
    align-items: center;
    gap: var(--form-gap-sm);
    margin: var(--form-gap) 0;
}

.form-divider::before,
.form-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--form-border);
}

.form-divider span {
    font-size: var(--form-help-size);
    color: var(--form-help);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   14. Form Message/Alert
   ========================================================================== */

.form-message {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: var(--form-radius);
    font-size: var(--form-font-size-sm);
    font-weight: 500;
    line-height: 1.5;
}

.form-message--error {
    background: var(--form-error-light);
    border: 1px solid var(--form-error);
    color: #b91c1c;
}

.form-message--success {
    background: var(--form-success-light);
    border: 1px solid var(--form-success);
    color: #047857;
}

.form-message--warning {
    background: var(--form-warning-light);
    border: 1px solid var(--form-warning);
    color: #b45309;
}

.form-message--info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid #3b82f6;
    color: #1d4ed8;
}

[data-theme="dark"] .form-message--error {
    color: #fca5a5;
}

[data-theme="dark"] .form-message--success {
    color: #6ee7b7;
}

[data-theme="dark"] .form-message--warning {
    color: #fcd34d;
}

[data-theme="dark"] .form-message--info {
    color: #93c5fd;
}

/* ==========================================================================
   15. Inline Form
   ========================================================================== */

.form-inline {
    display: flex;
    align-items: flex-end;
    gap: var(--form-gap-sm);
}

.form-inline .form-group {
    margin-bottom: 0;
}

.form-inline .form-input {
    min-width: 200px;
}

@media (max-width: 768px) {
    .form-inline {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-inline .form-input {
        min-width: 100%;
    }
}

/* ==========================================================================
   16. Password Requirements
   ========================================================================== */

.form-password-requirements {
    padding: 1rem;
    background: var(--form-bg);
    border-radius: var(--form-radius);
    margin-top: var(--form-gap-sm);
}

.form-password-requirements p {
    font-size: var(--form-font-size-sm);
    font-weight: 500;
    color: var(--form-label);
    margin: 0 0 0.5rem 0;
}

.form-password-requirements ul {
    margin: 0;
    padding-left: 1.25rem;
    list-style: none;
}

.form-password-requirements li {
    font-size: var(--form-help-size);
    color: var(--form-help);
    line-height: 1.6;
    position: relative;
}

.form-password-requirements li::before {
    content: '•';
    position: absolute;
    left: -1rem;
    color: var(--form-help);
}

.form-password-requirements li.valid {
    color: var(--form-success);
}

.form-password-requirements li.valid::before {
    content: '✓';
    color: var(--form-success);
}

/* ==========================================================================
   17. Backward Compatibility Classes (Legacy Support)
   ========================================================================== */

/* Support for existing .option-group usage */
.option-group {
    margin-bottom: var(--form-gap);
}

.option-group label {
    display: block;
    font-size: var(--form-label-size);
    font-weight: 500;
    color: var(--form-label);
    margin-bottom: var(--form-label-gap);
}

.option-group label .required {
    color: var(--form-error);
}

.option-group input[type="text"],
.option-group input[type="email"],
.option-group input[type="password"],
.option-group input[type="tel"],
.option-group input[type="url"],
.option-group input[type="number"],
.option-group input[type="search"] {
    width: 100%;
    height: var(--form-input-height);
    padding: var(--form-input-padding);
    font-size: var(--form-font-size);
    font-family: inherit;
    color: var(--form-text);
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: var(--form-radius);
    transition: var(--form-transition);
    outline: none;
}

.option-group input::placeholder {
    color: var(--form-placeholder);
}

.option-group input:hover {
    border-color: var(--form-border-hover);
}

.option-group input:focus {
    background: var(--form-bg-focus);
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.option-group textarea {
    width: 100%;
    min-height: 120px;
    padding: var(--form-input-padding);
    font-size: var(--form-font-size);
    font-family: inherit;
    color: var(--form-text);
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: var(--form-radius);
    transition: var(--form-transition);
    outline: none;
    resize: vertical;
    line-height: 1.6;
}

.option-group textarea:focus {
    background: var(--form-bg-focus);
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.option-group select {
    width: 100%;
    height: var(--form-input-height);
    padding: var(--form-input-padding);
    padding-right: 2.5rem;
    font-size: var(--form-font-size);
    font-family: inherit;
    color: var(--form-text);
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: var(--form-radius);
    transition: var(--form-transition);
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 20px;
}

.option-group select:focus {
    background-color: var(--form-bg-focus);
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

/* Support for existing .checkbox-label usage */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    font-size: var(--form-font-size-sm);
    color: var(--form-label);
    line-height: 1.5;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    min-width: 20px;
    margin: 0;
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--form-transition);
    position: relative;
    flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:hover {
    border-color: var(--form-border-hover);
}

.checkbox-label input[type="checkbox"]:focus {
    outline: none;
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.checkbox-label input[type="checkbox"]:checked {
    background: var(--form-primary);
    border-color: var(--form-primary);
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 11px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label a {
    color: var(--form-primary);
    text-decoration: none;
}

.checkbox-label a:hover {
    text-decoration: underline;
}

/* Checkbox Group */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--form-gap-sm);
}

/* Support for existing .input-with-icon usage */
.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-icon svg:first-child {
    position: absolute;
    left: 1rem;
    color: var(--form-icon);
    pointer-events: none;
    z-index: 1;
    transition: var(--form-transition);
    width: 20px;
    height: 20px;
}

.input-with-icon input {
    width: 100%;
    height: var(--form-input-height);
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    font-size: var(--form-font-size);
    font-family: inherit;
    color: var(--form-text);
    background: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border);
    border-radius: var(--form-radius);
    transition: var(--form-transition);
    outline: none;
}

.input-with-icon input::placeholder {
    color: var(--form-placeholder);
}

.input-with-icon input:hover {
    border-color: var(--form-border-hover);
}

.input-with-icon input:focus {
    background: var(--form-bg-focus);
    border-color: var(--form-primary);
    box-shadow: 0 0 0 4px var(--form-primary-focus);
}

.input-with-icon:focus-within svg:first-child {
    color: var(--form-icon-focus);
}

/* Password toggle button */
.password-toggle {
    position: absolute;
    right: 0.5rem;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--form-icon);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--form-transition);
    border-radius: var(--form-radius-sm);
}

.password-toggle:hover {
    color: var(--form-text);
    background: var(--form-border);
}