/* ===== FORMS COMPONENT ===== */
/* This component handles all form styling and validation states across the application */
/* Used by: All pages with forms (login, signup, dashboard, profile, admin) */
/* JavaScript dependencies: form-security.js, ajax-forms.js, button-states.js */

/* ===== BASE FORM STYLES ===== */
/* Form container */
form {
    padding: var(--space-2);
}

/* Form group - standard form element container */
.form-group {
    margin-bottom: var(--space-5);
    animation: slideInUp 0.3s ease-out;
}
.form-group.checkbox{
    margin-bottom: var(--space-5);
    animation: slideInUp 0.3s ease-out;
}

/* Form labels */
label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

/* Base form inputs */
input, textarea, select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    min-height: 44px; /* WCAG touch target size */
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--bg-hover);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* Form help text */
.form-help {
    display: block;
    margin-top: var(--space-1);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Form row for side-by-side inputs */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

/* ===== INPUT GROUPS ===== */
/* Standard input group - horizontal input arrangements */
.input-group {
    display: flex;
}

.url-bar {
    background: var(--bg-secondary);
    padding: var(--space-3);
    display: flex;
    align-items: center;
    color: var(--text-muted);
    font-weight: 500;
    white-space: nowrap;
}

.input-group input {
    border-left: none;
    border-radius: 0 var(--radius) var(--radius) 0;
}

/* Dashboard-specific input group (profile URL display) */
.dashboard-content .input-group {
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-secondary);
}

.dashboard-content .url-bar {
    font-weight: 500;
    font-size: 0.95rem;
}

.dashboard-content .input-group input {
    border: none;
    background: var(--bg-secondary);
    opacity: 0.7;
    cursor: not-allowed;
    border-radius: 0;
}

/* ===== PASSWORD FIELDS ===== */

.password-field {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius);
    min-height: 36px;
    min-width: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.password-toggle:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.password-toggle:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Password strength indicator */
.password-strength {
    margin-top: var(--space-2);
}

.strength-meter {
    width: 100%;
    height: 4px;
    background: var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: var(--space-1);
}

.strength-bar {
    height: 100%;
    border-radius: var(--radius);
}

.strength-bar.weak { 
    background: var(--error); 
}

.strength-bar.medium { 
    background: var(--warning); 
}

.strength-bar.strong { 
    background: var(--success); 
}

.strength-text {
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

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

/* Form validation states */
.form-group.has-error input,
.form-group.has-error textarea,
.form-group.has-error select {
    border-color: var(--error);
    background: #fef2f2;
}

.form-group.has-success input,
.form-group.has-success textarea,
.form-group.has-success select {
    border-color: var(--success);
    background: #f0fdf4;
}

/* Input states */
input.error,
textarea.error,
select.error {
    border-color: var(--error);
    background: #fef2f2;
}

input.valid,
textarea.valid,
select.valid {
    border-color: var(--success);
}

input.invalid,
textarea.invalid,
select.invalid {
    border-color: var(--error);
}

/* Username validation styles */

.username-feedback {
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

.username-feedback.valid {
    color: var(--success-color, #28a745);
}

.username-feedback.invalid {
    color: var(--error-color, #dc3545);
}

/* Username input validation states */
#new_username.valid {
    border-color: var(--success-color, #28a745);
    background-color: var(--bg-success-subtle);
}

#new_username.invalid {
    border-color: var(--error-color, #dc3545);
    background-color: var(--bg-error-subtle);
}

#new_username:focus.valid {
    box-shadow: 0 0 0 0.2rem var(--border-success);
}

#new_username:focus.invalid {
    box-shadow: 0 0 0 0.2rem var(--border-error);
}

/* Current username display */
.username-change-form input[readonly] {
    background-color: var(--background-secondary);
    cursor: not-allowed;
    font-family: var(--font-mono, monospace);
}

/* Input group for current username */
.username-change-form .input-group {
    display: flex;
    align-items: stretch;
    width: fit-content;
}

#current-profile-url {
    width: fit-content;

}

.username-change-form .input-group input {
    flex: 1;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.username-change-form .input-append {
    display: flex;
}

.username-change-form .input-append .btn {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    border-left: 0;
    white-space: nowrap;
}

/* Icon spacing */
.username-change-form .icon-external-link {
    margin-left: 0.5rem;
}

/* ===== FORM ERROR MESSAGES ===== */
/* Field error messages - used by form validation and AJAX forms */
.field-error {
    display: block;
    color: var(--error);
    font-size: 0.875rem;
    margin-top: var(--space-1);
}

/* Security-related error messages (used by form-security.js) */
.field-security-error {
    display: block;
    color: var(--error);
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid var(--error);
    border-radius: var(--radius);
    padding: var(--space-2) var(--space-3);
    margin-top: var(--space-2);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Security info messages (used by form-security.js) */
.field-info {
    display: block;
    color: var(--primary);
    background: var(--bg-hover);
    border: 1px solid var(--primary);
    border-radius: var(--radius);
    padding: var(--space-2) var(--space-3);
    margin-top: var(--space-2);
    font-size: 0.875rem;
}

/* Security overlay (used by form-security.js) */
.security-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    padding: var(--space-4);
}

.security-overlay .overlay-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    max-width: 500px;
    width: 100%;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.security-overlay .overlay-content h3 {
    color: var(--error);
    margin-bottom: var(--space-4);
    font-size: 1.25rem;
}

.security-overlay .overlay-content p {
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

/* ===== AJAX FORM STATES ===== */
/* Form loading state (used by ajax-forms.js) */
.ajax-form-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.ajax-form-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: var(--radius);
}

/* Form error state (used by ajax-forms.js) */
.ajax-form-error {
    border: 2px solid var(--error);
    background: var(--bg-error-subtle);
    animation: shake 0.5s ease-in-out;
}

/* Form success state (used by ajax-forms.js) */
.ajax-form-success {
    border: 2px solid var(--success);
    background: rgba(34, 197, 94, 0.05);
    animation: pulse-success 0.6s ease-in-out;
}

/* Native browser validation states */
input:invalid:not(:focus):not(:placeholder-shown),
textarea:invalid:not(:focus):not(:placeholder-shown),
select:invalid:not(:focus) {
    border-color: var(--error);
    background-color: var(--bg-error-subtle);
}

input:valid:not(:focus):not(:placeholder-shown),
textarea:valid:not(:focus):not(:placeholder-shown),
select:valid:not(:focus) {
    border-color: var(--success);
}

/* Required field indicator */
input:required,
textarea:required,
select:required {
    background-image: linear-gradient(to right, transparent calc(100% - 2px), var(--primary) 2px);
    background-repeat: no-repeat;
    background-position: center right 1rem;
    background-size: 5px 5px;
}

/* Remove required indicator when field has value */
input:required:not(:placeholder-shown),
textarea:required:not(:placeholder-shown),
select:required:valid {
    background-image: none;
}

/* Focus state for invalid fields */
input:invalid:focus,
textarea:invalid:focus,
select:invalid:focus {
    border-color: var(--error);
    box-shadow: 0 0 0 0.2rem var(--border-error);
}

/* Help text turns to error color when field is invalid */
input:invalid:not(:focus):not(:placeholder-shown) ~ .form-help,
textarea:invalid:not(:focus):not(:placeholder-shown) ~ .form-help,
select:invalid:not(:focus) ~ .form-help {
    color: var(--error);
}

/* Input with icon */
.input-with-icon {
    position: relative;
}

.input-icon {
    position: absolute;
    left: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
    pointer-events: none;
}

.input-with-icon input {
    padding-left: calc(var(--space-4) + var(--space-6));
}

/* Character counter */
.character-counter {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: var(--space-1);
}


/* Security notices */
.security-notice {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--bg-secondary);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary);
    margin-bottom: var(--space-2);
}

.security-notice p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.security-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

/* Security tips section */
.security-tips {
    margin-top: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary);
}

.security-tips h3 {
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.security-tips h3::before {
    content: '🛡️';
    font-size: 1.25rem;
}

.security-tips ul {
    list-style: none;
    padding: 0;
}

.security-tips li {
    padding: var(--space-2) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--space-5);
}

.security-tips li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* User greeting */
.user-greeting {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    background: var(--bg-secondary);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-top: var(--space-4);
}

.greeting-icon {
    font-size: 1.5rem;
}

.user-greeting p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Additional info sections */
.additional-info {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-light);
}

.additional-info p {
    margin-bottom: var(--space-2);
}

/* Divider */
.divider {
    text-align: center;
    margin: var(--space-4) 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border);
}

.divider span {
    background: var(--bg-primary);
    padding: 0 var(--space-3);
    color: var(--text-muted);
    font-size: 0.9rem;
}


/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    /* Form layout adjustments */
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }
    
    .language-form .form-group {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }
    
    .user-greeting {
        flex-direction: column;
        text-align: center;
    }
    
    .security-notice {
        flex-direction: column;
        text-align: center;
        gap: var(--space-2);
    }
}

@media (max-width: 480px) {
    .security-tips {
        padding: var(--space-4);
    }
    
    .input-with-icon input {
        padding-left: calc(var(--space-3) + var(--space-5));
    }
}

/* Dark theme enhancements */
[data-theme="dark"] .form-group.has-error input,
[data-theme="dark"] .form-group.has-error textarea,
[data-theme="dark"] .form-group.has-error select,
[data-theme="dark"] input.error,
[data-theme="dark"] textarea.error,
[data-theme="dark"] select.error,
[data-theme="system"].system-dark .form-group.has-error input,
[data-theme="system"].system-dark .form-group.has-error textarea,
[data-theme="system"].system-dark .form-group.has-error select,
[data-theme="system"].system-dark input.error,
[data-theme="system"].system-dark textarea.error,
[data-theme="system"].system-dark select.error {
    background: rgba(127, 29, 29, 0.2);
}

[data-theme="dark"] .form-group.has-success input,
[data-theme="dark"] .form-group.has-success textarea,
[data-theme="dark"] .form-group.has-success select,
[data-theme="system"].system-dark .form-group.has-success input,
[data-theme="system"].system-dark .form-group.has-success textarea,
[data-theme="system"].system-dark .form-group.has-success select {
    background: rgba(6, 78, 59, 0.2);
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .password-field input,
    .input-with-icon input,
    .security-notice,
    .security-tips {
        border-width: 2px;
    }
    
    .strength-meter {
        border: 1px solid var(--text-primary);
    }
}

/* ===== SPECIALIZED FORM SECTIONS ===== */
/* Auth form overrides */
.auth-form .form-group {
    margin-bottom: var(--space-6);
}

.auth-form .form-group label {
    font-weight: bold;
    color: var(--text-primary);
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}


/* Add link form overrides */
.add-link-form .form-group {
    margin-bottom: var(--space-3);
}


/* Language form styles */
.language-form .form-group {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--primary);
}

.language-form .form-group label {
    margin-bottom: 0;
    font-weight: 600;
    color: var(--text-primary);
}

/* Language dropdown auto-width */
.language-form select,
#preferred_language,
#content_language {
    width: auto;
    min-width: 200px; /* Minimum width for usability */
    max-width: 100%; /* Don't overflow container */
}

/* Ensure language dropdowns are responsive on small screens */
@media (max-width: 768px) {
    .language-form select,
    #preferred_language,
    #content_language {
        min-width: 180px;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .language-form select,
    #preferred_language,
    #content_language {
        min-width: 160px;
        width: 100%; /* Full width on very small screens for better UX */
    }
}

/* Input updated feedback for AJAX operations */
.input-updated {
    background: rgba(40, 167, 69, 0.1) !important;
    border-color: var(--success) !important;
}

/* Dark theme input updated styles */
[data-theme="dark"] .input-updated,
[data-theme="system"].system-dark .input-updated {
    background: rgba(34, 197, 94, 0.2) !important;
}

/* High contrast mode input updated */
@media (prefers-contrast: high) {
    .input-updated {
        background: rgba(0, 128, 0, 0.2) !important;
        border-color: #00AA00 !important;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-2px); }
    20%, 40%, 60%, 80% { transform: translateX(2px); }
}

@keyframes pulse-success {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    .form-group,
    .password-toggle,
    .strength-bar,
    .input-updated,
    .ajax-form-error,
    .ajax-form-success {
        animation: none;
    }
}