/* ==============================================================================
   WCAGify Research - Premium Design System
   God-level UI with glassmorphism, micro-animations, and premium aesthetics
   ============================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    /* Premium color palette */
    --primary-hue: 227;
    --primary: hsl(var(--primary-hue), 100%, 68%);
    --primary-dark: hsl(var(--primary-hue), 100%, 58%);
    --primary-light: hsl(var(--primary-hue), 100%, 82%);
    --primary-glow: hsla(var(--primary-hue), 100%, 68%, 0.4);

    /* Accent gradient */
    --gradient-primary: linear-gradient(135deg, hsl(227, 100%, 68%) 0%, hsl(245, 95%, 65%) 50%, hsl(270, 90%, 62%) 100%);
    --gradient-dark: linear-gradient(135deg, hsl(227, 100%, 58%) 0%, hsl(250, 95%, 52%) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);

    /* Neutral colors - refined */
    --gray-25: #fcfcfd;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Semantic colors */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --error: #ef4444;
    --error-light: #fee2e2;
    --info: #3b82f6;

    /* Spacing scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Premium shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.05);
    --shadow-xl: 0 20px 40px -10px rgb(0 0 0 / 0.15);
    --shadow-glow: 0 0 40px var(--primary-glow);
    --shadow-card: 0 0 0 1px rgba(0, 0, 0, 0.03), 0 2px 4px rgba(0, 0, 0, 0.05), 0 12px 24px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--gray-800);
    line-height: 1.6;
    background: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==============================================================================
   LANDING PAGE - Premium Hero
   ============================================================================== */

.landing-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(ellipse at 20% 0%, hsla(227, 100%, 68%, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, hsla(245, 95%, 65%, 0.08) 0%, transparent 50%),
        var(--gray-50);
}

.landing-header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}

/* .logo {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
} */

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--gray-800);
    transition: var(--transition-base);
}

.logo-link:hover {
    transform: translateY(-1px);
}

.logo-text {
    font-weight: 700;
    font-size: 1.35rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-hero {
    flex: 1;
    display: flex;
    align-items: center;
    padding: var(--space-16) 0;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: var(--space-6);
    color: var(--gray-900);
    letter-spacing: -0.03em;
}

.hero-title .text-primary {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: var(--space-4);
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--gray-700);
    margin-bottom: var(--space-10);
}

.cta-box {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    margin-bottom: var(--space-10);
    text-align: left;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.cta-content {
    display: flex;
    align-items: flex-start;
    gap: var(--space-5);
    margin-bottom: var(--space-5);
}

.cta-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-glow);
}

.cta-text h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: var(--space-1);
    color: var(--gray-900);
}

.cta-text p {
    color: var(--gray-600);
    margin: 0;
}

.cta-note {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    border: 1px solid var(--gray-100);
}

.cta-note p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--gray-700);
}

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-6);
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--gray-600);
    font-size: 0.9rem;
    font-weight: 500;
}

.trust-badge svg {
    color: var(--success);
}

.landing-footer {
    background: white;
    border-top: 1px solid var(--gray-200);
    padding: var(--space-8) 0;
}

.footer-text {
    color: var(--gray-600);
    margin-bottom: var(--space-2);
}

.footer-text a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-text a:hover {
    text-decoration: underline;
}

.footer-copyright {
    color: var(--gray-400);
    font-size: 0.875rem;
    margin: 0;
}

/* ==============================================================================
   SURVEY PAGE - Premium Survey Experience
   ============================================================================== */

.survey-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(ellipse at 0% 0%, hsla(227, 100%, 68%, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 100% 100%, hsla(245, 95%, 65%, 0.06) 0%, transparent 50%),
        var(--gray-50);
}

.survey-header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.survey-main {
    flex: 1;
    padding: var(--space-8) 0 var(--space-16);
}

.survey-card {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* Survey Intro Header - Glass morphism */
.survey-intro {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-8) var(--space-8);
    position: relative;
    overflow: hidden;
}

.survey-intro::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(255, 255, 255, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

.survey-intro h1 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
    position: relative;
}

.survey-intro h1 .fw-normal {
    font-weight: 400;
    opacity: 0.85;
}

.survey-intro p {
    opacity: 0.9;
    margin-bottom: var(--space-4);
    font-size: 1.05rem;
    position: relative;
}

.survey-intro .trust-cues {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
    font-size: 0.875rem;
    opacity: 0.9;
    position: relative;
}

.survey-intro .trust-cue {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* Stepper - Premium tabs */
.bs-stepper {
    display: flex;
    flex-direction: column;
}

.bs-stepper-header {
    display: flex;
    padding: var(--space-5) var(--space-6);
    background: var(--gray-25);
    border-bottom: 1px solid var(--gray-100);
    flex-wrap: wrap;
    gap: var(--space-3);
    align-items: center;
}

.step {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.step-trigger {
    background: none;
    border: none;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-xl);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--gray-500);
    transition: var(--transition-base);
    font-family: inherit;
}

.step-trigger:hover {
    background: white;
    color: var(--gray-700);
}

.step.active .step-trigger {
    background: white;
    box-shadow: var(--shadow-md);
    color: var(--primary);
}

.step.completed .step-trigger {
    color: var(--success);
}

.bs-stepper-circle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    transition: var(--transition-base);
}

.step.active .bs-stepper-circle {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.step.completed .bs-stepper-circle {
    background: var(--success);
    color: white;
}

.step.completed .bs-stepper-circle::after {
    content: '✓';
}

.step.completed .bs-stepper-circle span {
    display: none;
}

.bs-stepper-label {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.bs-stepper-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.bs-stepper-subtitle {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.step-line {
    width: 32px;
    height: 2px;
    background: var(--gray-200);
    border-radius: var(--radius-full);
}

.step.completed+.step-line,
.step.active+.step-line {
    background: var(--primary-light);
}

.bs-stepper-content {
    padding: var(--space-10);
}

.step-content {
    display: none;
    animation: fadeIn var(--transition-slow) ease-out;
}

.step-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Form Headings */
.step-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-6);
}

/* ==============================================================================
   FORM ELEMENTS - Premium Inputs
   ============================================================================== */

.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
    font-size: 0.9375rem;
}

.form-label .required {
    color: var(--error);
    margin-left: 2px;
}

.form-control,
.form-select {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    font-family: inherit;
    transition: var(--transition-base);
    background: white;
}

.form-control:hover,
.form-select:hover {
    border-color: var(--gray-300);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
    outline: none;
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--error);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.15);
}

.invalid-feedback {
    color: var(--error);
    font-size: 0.875rem;
    margin-top: var(--space-2);
    display: none;
    font-weight: 500;
}

.is-invalid~.invalid-feedback,
.invalid-feedback.show {
    display: block;
}

.form-text {
    color: var(--gray-500);
    font-size: 0.875rem;
    margin-top: var(--space-2);
}

.form-check {
    margin-bottom: var(--space-3);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: var(--space-3);
    cursor: pointer;
    border: 2px solid var(--gray-300);
    transition: var(--transition-fast);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check-input:focus {
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.form-check-label {
    cursor: pointer;
    font-weight: 500;
}

/* ==============================================================================
   CHECKBOX & RADIO CARDS - Premium Selection UI
   ============================================================================== */

.checkbox-group,
.radio-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-3);
}

.checkbox-item,
.radio-item {
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-height: 60px;
    justify-content: center;
}

.checkbox-item:hover,
.radio-item:hover {
    border-color: var(--primary-light);
    background: var(--gray-25);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.checkbox-item.checked,
.radio-item.checked {
    background: linear-gradient(135deg, hsla(227, 100%, 68%, 0.1) 0%, hsla(245, 95%, 65%, 0.06) 100%);
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-glow);
}

.checkbox-item.checked::after,
.radio-item.checked::after {
    content: '✓';
    position: absolute;
    top: 8px;
    right: 10px;
    width: 20px;
    height: 20px;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
}

.checkbox-item input,
.radio-item input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.checkbox-item span,
.radio-item span {
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.checkbox-item.checked span,
.radio-item.checked span {
    color: var(--primary-dark);
}

.checkbox-item small,
.radio-item small {
    color: var(--gray-500);
    font-size: 0.75rem;
    margin-top: var(--space-1);
}

/* ==============================================================================
   BUTTONS - Premium Actions
   ============================================================================== */

.btn {
    padding: 0.75rem 1.75rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    font-family: inherit;
    font-size: 0.9375rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:focus {
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.btn-outline-secondary {
    border-color: var(--gray-300);
    color: var(--gray-700);
    background: white;
}

.btn-outline-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
    color: var(--gray-800);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-color: transparent;
    color: white;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.4), var(--shadow-lg);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    border-radius: var(--radius-xl);
}

.step-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-10);
    padding-top: var(--space-8);
    border-top: 1px solid var(--gray-100);
}

/* ==============================================================================
   STATUS PAGES - Premium Feedback
   ============================================================================== */

.status-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    background:
        radial-gradient(ellipse at 50% 0%, hsla(256, 78%, 58%, 0.08) 0%, transparent 50%),
        var(--gray-50);
}

.status-card {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-12);
    text-align: center;
    max-width: 480px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.status-icon {
    width: 88px;
    height: 88px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-6);
}

.status-icon.success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(5, 150, 105, 0.1) 100%);
    color: var(--success);
}

.status-icon.error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(220, 38, 38, 0.1) 100%);
    color: var(--error);
}

.status-icon.warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(217, 119, 6, 0.1) 100%);
    color: var(--warning);
}

.status-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: var(--gray-900);
}

.status-message {
    color: var(--gray-600);
    margin-bottom: var(--space-6);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* ==============================================================================
   LOADING STATE
   ============================================================================== */

.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-16);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

/* ==============================================================================
   UTILITY CLASSES
   ============================================================================== */

.text-muted {
    color: var(--gray-500) !important;
}

.text-primary {
    color: var(--primary) !important;
}

.bg-light {
    background: var(--gray-50) !important;
    border-radius: var(--radius-lg);
}

.alert-light {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    color: var(--gray-700);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
}

/* Review Summary */
#review-summary {
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
}

#review-summary h6 {
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--gray-500);
}

#review-summary p {
    font-weight: 500;
    color: var(--gray-800);
}

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

*:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -50px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: var(--space-3) var(--space-5);
    z-index: 1000;
    transition: top var(--transition-fast);
    border-radius: 0 0 var(--radius-md) 0;
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==============================================================================
   RESPONSIVE - Complete Breakpoint System
   ============================================================================== */

/* Extra Small - Mobile Portrait (< 576px) */
@media (max-width: 575.98px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .survey-intro {
        padding: var(--space-5);
    }

    .survey-intro h1 {
        font-size: 1.25rem;
    }

    .survey-intro .trust-cues {
        flex-direction: column;
        gap: var(--space-2);
    }

    .bs-stepper-header {
        padding: var(--space-3);
        gap: var(--space-2);
    }

    .bs-stepper-label {
        display: none;
    }

    .bs-stepper-circle {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }

    .step-trigger {
        padding: var(--space-2);
    }

    .step-line {
        width: 12px;
    }

    .bs-stepper-content {
        padding: var(--space-4);
    }

    .step-content h2 {
        font-size: 1.25rem;
    }

    .checkbox-group,
    .radio-group {
        grid-template-columns: 1fr;
        gap: var(--space-2);
    }

    .checkbox-item,
    .radio-item {
        padding: var(--space-3);
        min-height: 50px;
        flex-direction: row;
        text-align: left;
        justify-content: flex-start;
    }

    .checkbox-item.checked::after,
    .radio-item.checked::after {
        top: 50%;
        transform: translateY(-50%);
    }

    .step-buttons {
        flex-direction: column-reverse;
        gap: var(--space-3);
    }

    .step-buttons .btn {
        width: 100%;
    }

    .status-card {
        padding: var(--space-6);
    }

    .status-icon {
        width: 64px;
        height: 64px;
    }

    .status-title {
        font-size: 1.35rem;
    }

    .form-label {
        font-size: 0.875rem;
    }

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }

    .btn-lg {
        padding: 0.875rem 2rem;
    }
}

/* Small - Mobile Landscape / Small Tablet (576px - 767px) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .survey-intro {
        padding: var(--space-6);
    }

    .bs-stepper-header {
        padding: var(--space-4);
    }

    .bs-stepper-label {
        display: none;
    }

    .step-line {
        width: 20px;
    }

    .bs-stepper-content {
        padding: var(--space-6);
    }

    .checkbox-group,
    .radio-group {
        grid-template-columns: repeat(2, 1fr);
    }

    .step-buttons {
        flex-direction: column-reverse;
        gap: var(--space-4);
    }

    .step-buttons .btn {
        width: 100%;
    }

    .status-card {
        padding: var(--space-8);
    }
}

/* Medium - Tablet (768px - 991px) */
@media (min-width: 768px) and (max-width: 991.98px) {
    .survey-intro {
        padding: var(--space-6) var(--space-8);
    }

    .bs-stepper-header {
        padding: var(--space-4) var(--space-6);
    }

    .bs-stepper-label {
        display: flex;
    }

    .bs-stepper-title {
        font-size: 0.8rem;
    }

    .bs-stepper-subtitle {
        font-size: 0.7rem;
    }

    .step-line {
        width: 24px;
    }

    .bs-stepper-content {
        padding: var(--space-8);
    }

    .checkbox-group,
    .radio-group {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Large - Desktop (992px - 1199px) */
@media (min-width: 992px) and (max-width: 1199.98px) {
    .survey-intro {
        padding: var(--space-8) var(--space-10);
    }

    .bs-stepper-header {
        padding: var(--space-5) var(--space-8);
    }

    .bs-stepper-content {
        padding: var(--space-10);
    }

    .checkbox-group,
    .radio-group {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Extra Large - Large Desktop (1200px - 1399px) */
@media (min-width: 1200px) and (max-width: 1399.98px) {
    .survey-intro {
        padding: var(--space-10) var(--space-12);
    }

    .bs-stepper-header {
        padding: var(--space-6) var(--space-10);
    }

    .bs-stepper-content {
        padding: var(--space-12);
    }

    .checkbox-group,
    .radio-group {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* XXL - Ultra Wide (1400px+) */
@media (min-width: 1400px) {
    .survey-intro {
        padding: var(--space-12) var(--space-16);
    }

    .survey-intro h1 {
        font-size: 1.85rem;
    }

    .bs-stepper-header {
        padding: var(--space-6) var(--space-12);
    }

    .bs-stepper-content {
        padding: var(--space-12) var(--space-16);
    }

    .checkbox-group,
    .radio-group {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .step-content h2 {
        font-size: 1.75rem;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==============================================================================
   DARK MODE READY (future)
   ============================================================================== */
@media (prefers-color-scheme: dark) {
    /* Ready for dark mode implementation */
}