/**
 * Form Validator Styles - Week 4 Quality Enhancement
 * Enhanced form validation styling with accessibility support
 */

/* ============================================
   FORM VALIDATION STATES
   ============================================ */

/* Error State */
.field-error {
    border-color: var(--danger-color, #ef4444) !important;
    background-color: rgba(239, 68, 68, 0.03);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1) !important;
    transition: all 0.2s ease;
}

.field-error:focus {
    border-color: var(--danger-color, #ef4444) !important;
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2) !important;
    outline: none;
}

/* Success State */
.field-success {
    border-color: var(--success-color, #10b981) !important;
    background-color: rgba(16, 185, 129, 0.03);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1) !important;
    transition: all 0.2s ease;
}

.field-success:focus {
    border-color: var(--success-color, #10b981) !important;
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2) !important;
    outline: none;
}

/* Error Message */
.field-error-message {
    color: var(--danger-color, #ef4444);
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 0.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    animation: slideDown 0.2s ease;
    line-height: 1.5;
}

.field-error-message::before {
    content: "⚠️";
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 1px;
}

/* Success Message */
.field-success-message {
    color: var(--success-color, #10b981);
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 0.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    animation: slideDown 0.2s ease;
}

.field-success-message::before {
    content: "✓";
    font-size: 1rem;
    flex-shrink: 0;
    font-weight: bold;
}

/* ============================================
   FORM GROUP ENHANCEMENTS
   ============================================ */

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary, #333);
    font-size: 0.95rem;
}

.form-group label.required::after {
    content: "*";
    color: var(--danger-color, #ef4444);
    margin-left: 0.25rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s ease;
    background: var(--primary-bg, white);
    color: var(--text-primary, #333);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--accent-color, #a07bcc);
    box-shadow: 0 0 0 3px rgba(160, 123, 204, 0.1);
    outline: none;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

/* Field Help Text */
.field-help {
    font-size: 0.875rem;
    color: var(--text-secondary, #666);
    margin-top: 0.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.field-help::before {
    content: "ℹ️";
    flex-shrink: 0;
}

/* Character Counter */
.char-counter {
    font-size: 0.875rem;
    color: var(--text-secondary, #666);
    text-align: right;
    margin-top: 0.5rem;
}

.char-counter.over-limit {
    color: var(--danger-color, #ef4444);
    font-weight: 600;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.field-error.shake {
    animation: shake 0.5s;
}

/* ============================================
   INLINE VALIDATION
   ============================================ */

.inline-validation {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.5rem;
    font-size: 0.875rem;
}

.validation-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.75rem;
}

.validation-icon.success {
    background: var(--success-color, #10b981);
    color: white;
}

.validation-icon.error {
    background: var(--danger-color, #ef4444);
    color: white;
}

/* ============================================
   PASSWORD STRENGTH INDICATOR
   ============================================ */

.password-strength {
    margin-top: 0.5rem;
}

.password-strength-bar {
    height: 4px;
    background: var(--border-color, #e5e7eb);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.password-strength-fill {
    height: 100%;
    transition: all 0.3s ease;
}

.password-strength-fill.weak {
    width: 33%;
    background: var(--danger-color, #ef4444);
}

.password-strength-fill.medium {
    width: 66%;
    background: var(--warning-color, #f59e0b);
}

.password-strength-fill.strong {
    width: 100%;
    background: var(--success-color, #10b981);
}

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

.password-strength-text.weak {
    color: var(--danger-color, #ef4444);
}

.password-strength-text.medium {
    color: var(--warning-color, #f59e0b);
}

.password-strength-text.strong {
    color: var(--success-color, #10b981);
}

/* ============================================
   FORM SUBMIT BUTTON
   ============================================ */

.submit-btn {
    background: var(--gradient, linear-gradient(135deg, #2a357a 0%, #a07bcc 100%));
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    width: 100%;
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(42, 53, 122, 0.2);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.submit-btn.loading {
    pointer-events: none;
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

/* High contrast mode support */
@media (prefers-contrast: high) {
    .field-error {
        border-width: 3px;
    }
    
    .field-success {
        border-width: 3px;
    }
    
    .field-error-message,
    .field-success-message {
        font-weight: 700;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .field-error-message,
    .field-success-message,
    .field-error.shake {
        animation: none;
    }
    
    .field-error,
    .field-success,
    .form-group input,
    .form-group textarea,
    .form-group select,
    .submit-btn {
        transition: none;
    }
}

/* Focus visible for keyboard navigation */
.field-error:focus-visible,
.field-success:focus-visible,
.form-group input:focus-visible,
.form-group textarea:focus-visible,
.form-group select:focus-visible {
    outline: 3px solid var(--accent-color, #a07bcc);
    outline-offset: 2px;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   DARK MODE SUPPORT
   ============================================ */

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea,
[data-theme="dark"] .form-group select {
    background: var(--secondary-bg, #161b22);
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary, #f0f6fc);
}

[data-theme="dark"] .field-error {
    background-color: rgba(239, 68, 68, 0.1);
}

[data-theme="dark"] .field-success {
    background-color: rgba(16, 185, 129, 0.1);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .form-group {
        margin-bottom: 1.25rem;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    .submit-btn {
        padding: 0.875rem 1.5rem;
    }
}