/**
 * User Registration 33% - Modern Frontend Styles (2025)
 */

/* CSS Custom Properties for theming and consistency */
:root {
    /* Color System */
    --sur-primary-50: #eff6ff;
    --sur-primary-100: #dbeafe;
    --sur-primary-500: #3b82f6;
    --sur-primary-600: #2563eb;
    --sur-primary-700: #1d4ed8;
    --sur-primary-800: #1e40af;
    
    --sur-gray-50: #f9fafb;
    --sur-gray-100: #f3f4f6;
    --sur-gray-200: #e5e7eb;
    --sur-gray-300: #d1d5db;
    --sur-gray-400: #9ca3af;
    --sur-gray-500: #6b7280;
    --sur-gray-600: #4b5563;
    --sur-gray-700: #374151;
    --sur-gray-800: #1f2937;
    --sur-gray-900: #111827;
    
    --sur-success-50: #ecfdf5;
    --sur-success-500: #10b981;
    --sur-success-600: #059669;
    
    --sur-error-50: #fef2f2;
    --sur-error-500: #ef4444;
    --sur-error-600: #dc2626;
    
    --sur-warning-50: #fffbeb;
    --sur-warning-500: #f59e0b;
    --sur-warning-600: #d97706;
    
    --sur-info-50: #eff6ff;
    --sur-info-500: #3b82f6;
    --sur-info-600: #2563eb;
    
    /* Typography */
    --sur-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --sur-font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Monaco, 'Cascadia Code', 'Roboto Mono', 'Courier New', monospace;
    
    /* Spacing Scale */
    --sur-space-1: 0.25rem;
    --sur-space-2: 0.5rem;
    --sur-space-3: 0.75rem;
    --sur-space-4: 1rem;
    --sur-space-5: 1.25rem;
    --sur-space-6: 1.5rem;
    --sur-space-8: 2rem;
    --sur-space-10: 2.5rem;
    --sur-space-12: 3rem;
    --sur-space-16: 4rem;
    --sur-space-20: 5rem;
    
    /* Radius Scale */
    --sur-radius-sm: 0.375rem;
    --sur-radius-md: 0.5rem;
    --sur-radius-lg: 0.75rem;
    --sur-radius-xl: 1rem;
    
    /* Shadows */
    --sur-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --sur-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --sur-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --sur-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --sur-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --sur-transition-medium: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --sur-transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Form Container */
.sur-registration-form {
    max-width: 28rem;
    width: 100%;
    margin: var(--sur-space-8) auto;
    background: transparent;
    border-radius: var(--sur-radius-xl);
    box-shadow: none;
    border: none;
    overflow: hidden;
    position: relative;
    font-family: var(--sur-font-family);
}

/* Form Header */
.sur-registration-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: transparent;
}

/* Form Inner Container */
.sur-registration-form form {
    padding: var(--sur-space-8);
}

/* Questionnaire Data Display - Hidden from user view */
.sur-questionnaire-data {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
    margin: 0 !important;
    padding: 0 !important;
}

.sur-questionnaire-data h3 {
    color: #1976d2;
    margin: 0 0 var(--sur-space-4) 0;
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--sur-space-2);
}

.sur-questionnaire-data .sur-field-group {
    margin-bottom: var(--sur-space-4);
}

.sur-questionnaire-data .sur-field-group:last-child {
    margin-bottom: 0;
}

.sur-questionnaire-data label {
    display: block;
    font-weight: 600;
    color: #1565c0;
    margin-bottom: var(--sur-space-2);
    font-size: 0.875rem;
}

.sur-questionnaire-data input[type="text"],
.sur-questionnaire-data textarea {
    width: 100%;
    padding: var(--sur-space-2) var(--sur-space-3);
    background: #f5f5f5 !important;
    border: 1px solid #bdbdbd;
    border-radius: var(--sur-radius-sm);
    font-family: var(--sur-font-family);
    font-size: 0.875rem;
    color: var(--sur-gray-800);
    box-sizing: border-box;
}

.sur-questionnaire-data textarea {
    font-family: var(--sur-font-mono);
    font-size: 0.75rem;
    resize: vertical;
    min-height: 100px;
}

.sur-questionnaire-data details {
    margin-top: var(--sur-space-4);
    padding: var(--sur-space-3);
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--sur-radius-sm);
}

.sur-questionnaire-data summary {
    cursor: pointer;
    color: #666;
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--sur-space-2);
    border-radius: var(--sur-radius-sm);
    transition: all var(--sur-transition-fast);
}

.sur-questionnaire-data summary:hover {
    background: rgba(255, 255, 255, 0.8);
    color: #1976d2;
}

.sur-questionnaire-data details[open] summary {
    margin-bottom: var(--sur-space-3);
    color: #1976d2;
}

/* Questionnaire answers section */
.sur-questionnaire-data > div > div {
    max-height: 300px;
    overflow-y: auto;
    background: #f9f9f9;
    padding: var(--sur-space-4);
    border: 1px solid #ddd;
    border-radius: var(--sur-radius-sm);
}

.sur-questionnaire-data > div > div > div {
    margin-bottom: var(--sur-space-4);
    padding-bottom: var(--sur-space-2);
    border-bottom: 1px solid #eee;
}

.sur-questionnaire-data > div > div > div:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

@keyframes fadeInDown {
    from {
        transform: translateY(-1rem);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Field Groups */
.sur-field-group {
    margin-bottom: var(--sur-space-6);
    position: relative;
}

.sur-field-group:last-of-type {
    margin-bottom: var(--sur-space-8);
}

/* Labels */
.sur-field-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--sur-gray-700);
    margin-bottom: var(--sur-space-2);
    line-height: 1.5;
    transition: color var(--sur-transition-fast);
}

/* Input Fields */
.sur-field-group input[type="text"],
.sur-field-group input[type="email"],
.sur-field-group input[type="password"] {
    width: 100%;
    padding: var(--sur-space-3) var(--sur-space-4);
    border: 2px solid var(--sur-gray-200);
    border-radius: var(--sur-radius-md);
    font-size: 1rem;
    font-family: var(--sur-font-family);
    line-height: 1.5;
    color: var(--sur-gray-900);
    background-color: white;
    box-sizing: border-box;
    transition: all var(--sur-transition-medium);
    outline: none;
    appearance: none;
}

/* Input States */
.sur-field-group input[type="text"]:focus,
.sur-field-group input[type="email"]:focus,
.sur-field-group input[type="password"]:focus {
    border-color: var(--sur-primary-500);
    box-shadow: 0 0 0 3px var(--sur-primary-50);
    transform: translateY(-1px);
}

.sur-field-group input[type="text"]:hover,
.sur-field-group input[type="email"]:hover,
.sur-field-group input[type="password"]:hover {
    border-color: var(--sur-gray-300);
}

.sur-field-group input[type="text"]:invalid:not(:focus):not(:placeholder-shown),
.sur-field-group input[type="email"]:invalid:not(:focus):not(:placeholder-shown),
.sur-field-group input[type="password"]:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--sur-error-500);
    box-shadow: 0 0 0 3px var(--sur-error-50);
}

.sur-field-group input[type="text"]:valid:not(:placeholder-shown),
.sur-field-group input[type="email"]:valid:not(:placeholder-shown) {
    border-color: var(--sur-success-500);
}

/* Input Icons */
.sur-field-group {
    position: relative;
}

.sur-field-group input:focus + .sur-field-icon,
.sur-field-group input:valid:not(:placeholder-shown) + .sur-field-icon {
    opacity: 1;
    transform: scale(1);
}

/* Password Strength Meter */
.sur-password-strength {
    margin-top: var(--sur-space-2);
    padding: var(--sur-space-2) var(--sur-space-3);
    border-radius: var(--sur-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--sur-transition-medium);
    min-height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sur-password-strength:empty {
    display: none;
}

.sur-password-strength.very-weak {
    background: var(--sur-error-50);
    color: var(--sur-error-600);
    border: 1px solid var(--sur-error-200);
}

.sur-password-strength.weak {
    background: var(--sur-warning-50);
    color: var(--sur-warning-600);
    border: 1px solid var(--sur-warning-200);
}

.sur-password-strength.medium {
    background: var(--sur-info-50);
    color: var(--sur-info-600);
    border: 1px solid var(--sur-info-200);
}

.sur-password-strength.strong {
    background: var(--sur-success-50);
    color: var(--sur-success-600);
    border: 1px solid var(--sur-success-200);
}

.sur-password-strength.very-strong {
    background: linear-gradient(135deg, var(--sur-success-50), var(--sur-primary-50));
    color: var(--sur-success-700);
    border: 1px solid var(--sur-success-300);
}

/* Submit Button */
.sur-submit-group {
    margin-top: var(--sur-space-8);
    display: flex;
    justify-content: center;
}

.sur-submit-group .button {
    width: 100%;
    padding: var(--sur-space-4) var(--sur-space-6);
    background: linear-gradient(135deg, var(--sur-primary-500), var(--sur-primary-600));
    color: white;
    border: none;
    border-radius: var(--sur-radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--sur-font-family);
    cursor: pointer;
    transition: all var(--sur-transition-medium);
    text-transform: none;
    letter-spacing: 0.025em;
    position: relative;
    overflow: hidden;
    box-shadow: var(--sur-shadow-sm);
}

.sur-submit-group .button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--sur-transition-slow);
}

.sur-submit-group .button:hover {
    background: linear-gradient(135deg, var(--sur-primary-600), var(--sur-primary-700));
    transform: translateY(-2px);
    box-shadow: var(--sur-shadow-lg);
}

.sur-submit-group .button:hover::before {
    left: 100%;
}

.sur-submit-group .button:active {
    transform: translateY(0);
    box-shadow: var(--sur-shadow-sm);
}

.sur-submit-group .button:focus {
    outline: none;
    box-shadow: var(--sur-shadow-md), 0 0 0 3px var(--sur-primary-50);
}

/* Messages */
.sur-message {
    padding: var(--sur-space-4) var(--sur-space-5);
    margin: var(--sur-space-4) 0;
    border-radius: var(--sur-radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid;
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: var(--sur-space-3);
}

.sur-message::before {
    content: '';
    flex-shrink: 0;
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 50%;
    margin-top: 0.125rem;
}

.sur-message.sur-error {
    background: var(--sur-error-50);
    border-color: var(--sur-error-200);
    color: var(--sur-error-700);
}

.sur-message.sur-error::before {
    background: var(--sur-error-500);
    mask: url("data:image/svg+xml,%3Csvg fill='white' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill-rule='evenodd' d='M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7 4a1 1 0 11-2 0 1 1 0 012 0zm-1-9a1 1 0 00-1 1v4a1 1 0 102 0V6a1 1 0 00-1-1z' clip-rule='evenodd'%3E%3C/path%3E%3C/svg%3E") center/contain;
}

.sur-message.sur-success {
    background: var(--sur-success-50);
    border-color: var(--sur-success-200);
    color: var(--sur-success-700);
}

.sur-message.sur-success::before {
    background: var(--sur-success-500);
    mask: url("data:image/svg+xml,%3Csvg fill='white' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill-rule='evenodd' d='M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z' clip-rule='evenodd'%3E%3C/path%3E%3C/svg%3E") center/contain;
}

.sur-message.sur-info {
    background: var(--sur-info-50);
    border-color: var(--sur-info-200);
    color: var(--sur-info-700);
}

.sur-message.sur-info::before {
    background: var(--sur-info-500);
    mask: url("data:image/svg+xml,%3Csvg fill='white' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill-rule='evenodd' d='M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7-4a1 1 0 11-2 0 1 1 0 012 0zM9 9a1 1 0 000 2v3a1 1 0 001 1h1a1 1 0 100-2v-3a1 1 0 00-1-1H9z' clip-rule='evenodd'%3E%3C/path%3E%3C/svg%3E") center/contain;
}

/* reCAPTCHA Container */
.g-recaptcha {
    margin: var(--sur-space-4) 0;
    display: flex;
    justify-content: center;
    transform: scale(0.9);
    transform-origin: center;
}

/* Loading State */
.sur-registration-form.loading {
    opacity: 0.7;
    pointer-events: none;
    position: relative;
}

.sur-registration-form.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2rem;
    height: 2rem;
    margin: -1rem 0 0 -1rem;
    border: 2px solid var(--sur-gray-200);
    border-top-color: var(--sur-primary-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Animations */
.sur-registration-form {
    animation: slideInUp var(--sur-transition-slow) ease-out;
}

@keyframes slideInUp {
    from {
        transform: translateY(2rem);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.sur-field-group {
    animation: fadeInUp var(--sur-transition-medium) ease-out;
    animation-fill-mode: both;
}

.sur-field-group:nth-child(1) { animation-delay: 50ms; }
.sur-field-group:nth-child(2) { animation-delay: 100ms; }
.sur-field-group:nth-child(3) { animation-delay: 150ms; }
.sur-field-group:nth-child(4) { animation-delay: 200ms; }
.sur-field-group:nth-child(5) { animation-delay: 250ms; }
.sur-field-group:nth-child(6) { animation-delay: 300ms; }

@keyframes fadeInUp {
    from {
        transform: translateY(1rem);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive Design - Mobile First */
@media (max-width: 640px) {
    .sur-registration-form {
        margin: var(--sur-space-4);
        max-width: none;
        border-radius: var(--sur-radius-lg);
        box-shadow: none;
    }
    
    .sur-registration-form form {
        padding: var(--sur-space-6);
    }
    
    .sur-field-group input[type="text"],
    .sur-field-group input[type="email"],
    .sur-field-group input[type="password"] {
        font-size: 16px; /* Prevent zoom on iOS */
        padding: var(--sur-space-4);
    }
    
    .g-recaptcha {
        transform: scale(0.8);
    }
    
    .sur-questionnaire-data {
        padding: var(--sur-space-3) !important;
        margin-bottom: var(--sur-space-4) !important;
    }
    
    .sur-questionnaire-data h3 {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .sur-registration-form {
        margin: var(--sur-space-2);
        border-radius: var(--sur-radius-md);
    }
    
    .sur-registration-form form {
        padding: var(--sur-space-4);
    }
    
    .g-recaptcha {
        transform: scale(0.75);
    }
    
    .sur-questionnaire-data h3 {
        font-size: 0.9rem;
    }
}

/* Large screens */
@media (min-width: 1024px) {
    .sur-registration-form {
        max-width: 32rem;
    }
    
    .sur-registration-form form {
        padding: var(--sur-space-10);
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .sur-submit-group .button::before {
        display: none;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .sur-registration-form {
        border: none;
    }
    
    .sur-field-group input[type="text"],
    .sur-field-group input[type="email"],
    .sur-field-group input[type="password"] {
        border-width: 2px;
    }
    
    .sur-submit-group .button {
        border: 2px solid var(--sur-primary-800);
    }
    
    .sur-questionnaire-data {
        border-width: 3px !important;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --sur-gray-50: #1f2937;
        --sur-gray-100: #374151;
        --sur-gray-200: #4b5563;
        --sur-gray-300: #6b7280;
        --sur-gray-400: #9ca3af;
        --sur-gray-500: #d1d5db;
        --sur-gray-600: #e5e7eb;
        --sur-gray-700: #f3f4f6;
        --sur-gray-800: #f9fafb;
        --sur-gray-900: #ffffff;
    }
    
    .sur-registration-form {
        background: transparent;
        border-color: transparent;
    }
    
    .sur-field-group input[type="text"],
    .sur-field-group input[type="email"],
    .sur-field-group input[type="password"] {
        background-color: var(--sur-gray-100);
        border-color: var(--sur-gray-200);
        color: var(--sur-gray-900);
    }
    
    .sur-field-group input[type="text"]:focus,
    .sur-field-group input[type="email"]:focus,
    .sur-field-group input[type="password"]:focus {
        background-color: var(--sur-gray-50);
    }
    
    .sur-questionnaire-data {
        background: #0d47a1 !important;
        border-color: #42a5f5 !important;
    }
    
    .sur-questionnaire-data h3 {
        color: #90caf9 !important;
    }
    
    .sur-questionnaire-data label {
        color: #64b5f6 !important;
    }
}

/* Focus indicators for keyboard navigation */
.sur-registration-form *:focus-visible {
    outline: 2px solid var(--sur-primary-500);
    outline-offset: 2px;
}

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

/* Form validation states */
.sur-field-group.has-error input {
    border-color: var(--sur-error-500);
    box-shadow: 0 0 0 3px var(--sur-error-50);
}

.sur-field-group.has-error label {
    color: var(--sur-error-600);
}

.sur-field-group.has-success input {
    border-color: var(--sur-success-500);
    box-shadow: 0 0 0 3px var(--sur-success-50);
}

/* Print styles */
@media print {
    .sur-registration-form {
        box-shadow: none;
        border: none;
    }
    
    .sur-submit-group .button {
        background: #000 !important;
        color: #fff !important;
    }
}