/* ============================================================================
   AlphaQuantix Analytics - The Quantitative Digital Agency
   Redesigned Website Styles - 2025
   ============================================================================ */

/* ============================================================================
   CSS Custom Properties (Design Tokens)
   ============================================================================ */
:root {
    /* Color Palette - Dark Theme with Purple/Blue Accents */
    --primary-bg: #0F0F23;
    --secondary-bg: #1A1A2E;
    --glass-bg: rgba(26, 26, 46, 0.6);
    --primary-text: #FFFFFF;
    --secondary-text: #CBD5E1;
    --tertiary-text: #94A3B8;

    /* Brand Colors */
    --primary-purple: #8B5CF6;
    --secondary-purple: #A855F7;
    --primary-blue: #3B82F6;
    --accent-teal: #06D6A0;
    --accent-gold: #F59E0B;

    /* UI Elements */
    --border-glass: rgba(255, 255, 255, 0.1);
    --shadow-glow: rgba(139, 92, 246, 0.3);
    --gradient-purple: linear-gradient(135deg, #8B5CF6, #A855F7);
    --gradient-blue: linear-gradient(135deg, #3B82F6, #8B5CF6);
    --blur-amount: blur(12px);

    /* Typography */
    --font-family-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    /* Spacing Scale (8px base) */
    --space-xs: 0.25rem;    /* 4px */
    --space-sm: 0.5rem;     /* 8px */
    --space-md: 1rem;       /* 16px */
    --space-lg: 1.5rem;     /* 24px */
    --space-xl: 2rem;       /* 32px */
    --space-2xl: 3rem;      /* 48px */
    --space-3xl: 4rem;      /* 64px */
    --space-4xl: 6rem;      /* 96px */

    /* Border Radius */
    --radius-sm: 0.375rem;  /* 6px */
    --radius-md: 0.5rem;    /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-full: 9999px;

    /* Transitions */
    --transition-base: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
}

/* ============================================================================
   Base & Reset Styles
   ============================================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

body {
    font-family: var(--font-family-base);
    background-color: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ============================================================================
   Accessibility - Skip Link
   ============================================================================ */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-purple);
    color: white;
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 var(--radius-md) 0;
    font-weight: 600;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--accent-teal);
    outline-offset: 2px;
}

/* ============================================================================
   Flowing Background Animation
   ============================================================================ */
.flowing-background {
    background: linear-gradient(300deg, #0f0f23, #1a1a2e, #8b5cf6, #3b82f6);
    background-size: 240% 240%;
    animation: gradient-animation 16s ease infinite;
}

@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ============================================================================
   Layout Components
   ============================================================================ */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    position: relative;
    z-index: 2;
}

.section {
    padding: var(--space-4xl) 0;
    position: relative;
    z-index: 2;
}

.section.darker-bg {
    background-color: var(--secondary-bg);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.3) inset;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--secondary-text);
    line-height: 1.7;
}

/* ============================================================================
   Scroll Progress Indicator
   ============================================================================ */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-purple);
    z-index: 10001;
    transition: width 0.1s ease-out;
}

/* ============================================================================
   Navigation
   ============================================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: var(--blur-amount);
    border-bottom: 1px solid var(--border-glass);
    z-index: 1000;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(15, 15, 35, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    padding: 0 var(--space-xl);
}

.nav-brand h2 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.brand-accent {
    font-weight: 800;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
    align-items: center;
}

.nav-link {
    color: var(--primary-text);
    text-decoration: none;
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    position: relative;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--primary-purple);
    background: rgba(255, 255, 255, 0.1);
    outline: none;
}

.nav-link:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.nav-link.active {
    color: var(--primary-purple);
    background: rgba(139, 92, 246, 0.1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-text);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.mobile-menu-toggle:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--primary-bg);
    padding: var(--space-md);
    border-top: 1px solid var(--border-glass);
    max-height: calc(100vh - 80px);
    overflow-y: auto;
}

.mobile-menu.active {
    display: block;
}

.mobile-nav-link {
    display: block;
    padding: var(--space-md);
    text-decoration: none;
    color: var(--primary-text);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.mobile-nav-link:hover,
.mobile-nav-link:focus {
    background: rgba(255, 255, 255, 0.1);
    outline: none;
}

.mobile-nav-link:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

/* ============================================================================
   Buttons
   ============================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    min-height: 44px; /* Accessibility: minimum touch target */
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 3px solid var(--accent-teal);
    outline-offset: 2px;
}

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

.btn-primary {
    background: var(--gradient-purple);
    color: white;
    border: none;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px var(--shadow-glow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-text);
    border: 1px solid var(--border-glass);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--primary-purple);
    border-color: var(--primary-purple);
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.btn-full-width {
    width: 100%;
}

.btn .icon {
    width: 1.25em;
    height: 1.25em;
}

/* ============================================================================
   Glass Cards
   ============================================================================ */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--blur-amount);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transition: var(--transition-base), opacity 0.5s ease, transform 0.5s ease;
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}

/* Animated gradient border on hover */
.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-xl);
    border: 2px solid transparent;
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-blue)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.glass-card:hover::before {
    opacity: 1;
}

.glass-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* ============================================================================
   Hero Section
   ============================================================================ */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px);
    padding: var(--space-3xl) 0;
    text-align: center;
    overflow: hidden;
    margin-top: 80px;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(139, 92, 246, 0.15);
    border: 1px solid var(--primary-purple);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-purple);
    animation: fadeInUp 0.6s ease-out;
}

.badge-icon {
    font-size: 1.25rem;
}

.hero h1 {
    font-size: clamp(2.5rem, 7vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--primary-text), var(--secondary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--secondary-text);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.3s both;
    margin-bottom: var(--space-xl);
}

.hero-trust-bar {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
    margin-top: var(--space-2xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--border-glass);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--secondary-text);
}

.trust-item .icon {
    color: var(--accent-teal);
    width: 20px;
    height: 20px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================================================
   Stats Section
   ============================================================================ */
.stats-section {
    padding: var(--space-2xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
    text-align: center;
}

.stat-item h3 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.stat-item p {
    color: var(--secondary-text);
    font-size: 0.95rem;
}

/* ============================================================================
   Services Section
   ============================================================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.service-card {
    display: flex;
    flex-direction: column;
    position: relative;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    color: var(--primary-text);
}

.service-card > p {
    color: var(--secondary-text);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    flex-grow: 1;
}

.card-icon {
    background: var(--gradient-purple);
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.card-icon .icon {
    width: 32px;
    height: 32px;
    color: white;
}

.service-features {
    list-style: none;
    margin-bottom: var(--space-lg);
    padding-left: 0;
}

.service-features li {
    padding: var(--space-sm) 0;
    color: var(--secondary-text);
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.95rem;
}

.service-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-teal);
    font-weight: bold;
}

.service-cta {
    margin-top: auto;
}

/* Featured Service Card */
.featured-service {
    border: 2px solid var(--primary-purple);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(168, 85, 247, 0.05));
}

.featured-badge {
    position: absolute;
    top: -12px;
    right: var(--space-xl);
    background: var(--gradient-purple);
    color: white;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.featured-description {
    font-size: 1.05rem;
    color: var(--primary-text);
}

/* ============================================================================
   Dual Brain Section
   ============================================================================ */
.dual-brain-section {
    background: linear-gradient(180deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
}

.dual-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.brain-card {
    text-align: left;
}

.brain-card h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-md);
}

.brain-card > p {
    color: var(--secondary-text);
    margin-bottom: var(--space-lg);
    font-size: 1.05rem;
}

.brain-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.creative-brain {
    background: linear-gradient(135deg, #8B5CF6, #EC4899);
}

.quant-brain {
    background: linear-gradient(135deg, #3B82F6, #06D6A0);
}

.brain-icon .icon {
    width: 40px;
    height: 40px;
    color: white;
}

.expertise-list {
    list-style: none;
    padding-left: 0;
}

.expertise-list li {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-glass);
    color: var(--secondary-text);
    font-size: 0.95rem;
}

.expertise-list li:last-child {
    border-bottom: none;
}

.expertise-list strong {
    color: var(--primary-text);
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 600;
}

.cta-center {
    text-align: center;
}

/* ============================================================================
   Case Studies Section
   ============================================================================ */
.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-2xl);
}

.case-study-card {
    display: flex;
    flex-direction: column;
}

.case-study-header {
    margin-bottom: var(--space-lg);
}

.case-study-category {
    display: inline-block;
    background: rgba(139, 92, 246, 0.2);
    color: var(--primary-purple);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-md);
}

.case-study-header h3 {
    font-size: 1.5rem;
    color: var(--primary-text);
}

.case-study-snapshot {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
    display: grid;
    gap: var(--space-sm);
}

.snapshot-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.snapshot-label {
    color: var(--tertiary-text);
    font-weight: 500;
}

.snapshot-item.highlight {
    color: var(--accent-teal);
    font-weight: 600;
}

.case-study-section {
    margin-bottom: var(--space-lg);
}

.case-study-section h4 {
    color: var(--primary-purple);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.case-study-section p {
    color: var(--secondary-text);
    line-height: 1.7;
    font-size: 0.95rem;
}

.case-study-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--space-md);
    padding: var(--space-lg);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

.metric-label {
    display: block;
    font-size: 0.8rem;
    color: var(--tertiary-text);
}

.case-study-cta {
    margin-top: auto;
}

/* ============================================================================
   Process Section
   ============================================================================ */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-2xl);
}

.process-step {
    text-align: center;
}

.process-step-number {
    width: 70px;
    height: 70px;
    border: 2px solid var(--primary-purple);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-purple);
    background: rgba(139, 92, 246, 0.1);
}

.process-step h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
}

.process-step p {
    color: var(--secondary-text);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============================================================================
   Testimonials Section
   ============================================================================ */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.testimonial-card {
    display: flex;
    flex-direction: column;
}

.testimonial-quote {
    flex-grow: 1;
    margin-bottom: var(--space-lg);
}

.testimonial-quote p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--secondary-text);
    font-style: italic;
}

.testimonial-quote p::before {
    content: '"';
    font-size: 3rem;
    color: var(--primary-purple);
    line-height: 0;
    display: block;
    margin-bottom: var(--space-md);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-glass);
}

.author-info h4 {
    color: var(--primary-text);
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.author-info p {
    color: var(--tertiary-text);
    font-size: 0.875rem;
}

/* ============================================================================
   CTA Section
   ============================================================================ */
.cta-section {
    padding: var(--space-3xl) 0;
}

.cta-card {
    text-align: center;
    padding: var(--space-3xl);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(59, 130, 246, 0.1));
    border: 2px solid var(--primary-purple);
}

.cta-card h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--space-md);
}

.cta-subtitle {
    font-size: 1.125rem;
    color: var(--secondary-text);
    margin-bottom: var(--space-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
}

.cta-note {
    font-size: 0.875rem;
    color: var(--tertiary-text);
    font-style: italic;
}

/* ============================================================================
   Contact Section
   ============================================================================ */
.contact-container {
    max-width: 1200px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-2xl);
}

.contact-form-card h3 {
    margin-bottom: var(--space-lg);
    font-size: 1.5rem;
}

.contact-form {
    display: grid;
    gap: var(--space-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: var(--space-sm);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--primary-text);
}

.required {
    color: var(--accent-teal);
}

.form-control {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    color: var(--primary-text);
    font-size: 1rem;
    font-family: var(--font-family-base);
    transition: var(--transition-base);
    min-height: 44px; /* Accessibility */
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px var(--shadow-glow);
    background: rgba(0, 0, 0, 0.4);
}

.form-control::placeholder {
    color: var(--tertiary-text);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23CBD5E1' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

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

.form-note {
    font-size: 0.875rem;
    color: var(--tertiary-text);
    text-align: center;
    margin-top: var(--space-md);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.info-card h3 {
    margin-bottom: var(--space-lg);
    font-size: 1.25rem;
}

.info-item {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.info-item .icon {
    width: 24px;
    height: 24px;
    color: var(--primary-purple);
    flex-shrink: 0;
}

.info-item p {
    margin-bottom: var(--space-xs);
    color: var(--secondary-text);
    font-size: 0.95rem;
}

.info-item strong {
    color: var(--primary-text);
}

.info-item a {
    color: var(--primary-purple);
    text-decoration: none;
    transition: var(--transition-fast);
}

.info-item a:hover,
.info-item a:focus {
    color: var(--secondary-purple);
    text-decoration: underline;
}

.why-choose-list {
    list-style: none;
    padding: 0;
}

.why-choose-list li {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
    margin-bottom: var(--space-md);
    color: var(--secondary-text);
    font-size: 0.95rem;
}

.check-icon {
    color: var(--accent-teal);
    flex-shrink: 0;
    margin-top: 2px;
}

/* ============================================================================
   Footer
   ============================================================================ */
.footer {
    background: var(--secondary-bg);
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid var(--border-glass);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand h2 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: var(--secondary-text);
    margin-bottom: var(--space-sm);
    font-size: 0.95rem;
}

.footer-tagline {
    color: var(--tertiary-text);
    font-size: 0.875rem;
    font-style: italic;
}

.footer-socials {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.footer-socials a {
    color: var(--secondary-text);
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
}

.footer-socials a:hover,
.footer-socials a:focus {
    color: var(--primary-purple);
    background: rgba(139, 92, 246, 0.1);
    transform: translateY(-2px);
}

.footer-socials a:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

.footer-links-section h4 {
    color: var(--primary-text);
    margin-bottom: var(--space-md);
    font-size: 1rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--secondary-text);
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.95rem;
}

.footer-links a:hover,
.footer-links a:focus {
    color: var(--primary-purple);
    padding-left: var(--space-xs);
}

.footer-links a:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-glass);
    color: var(--tertiary-text);
    font-size: 0.875rem;
}

.footer-certifications {
    margin-top: var(--space-sm);
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.separator {
    color: var(--border-glass);
}

/* ============================================================================
   Back to Top Button
   ============================================================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    backdrop-filter: var(--blur-amount);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    color: var(--primary-text);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top:hover {
    background: var(--primary-purple);
    box-shadow: 0 0 20px var(--shadow-glow);
    transform: translateY(-4px);
}

.back-to-top:focus-visible {
    outline: 3px solid var(--accent-teal);
    outline-offset: 2px;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* ============================================================================
   Responsive Design - Tablet
   ============================================================================ */
@media (max-width: 992px) {
    .nav-menu,
    .nav-cta {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .dual-grid {
        grid-template-columns: 1fr;
    }

    .process-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

/* ============================================================================
   Responsive Design - Mobile
   ============================================================================ */
@media (max-width: 768px) {
    :root {
        --space-4xl: 3rem;
    }

    .container {
        padding: 0 var(--space-md);
    }

    .nav-container {
        padding: 0 var(--space-md);
    }

    .section {
        padding: var(--space-2xl) 0;
    }

    .hero {
        min-height: 70vh;
        padding: var(--space-xl) 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-trust-bar {
        flex-direction: column;
        gap: var(--space-md);
        align-items: center;
    }

    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: var(--space-md);
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .case-studies-grid {
        grid-template-columns: 1fr;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-socials {
        justify-content: center;
    }

    .footer-certifications {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .separator {
        display: none;
    }

    .btn-large {
        padding: var(--space-md);
        font-size: 0.95rem;
    }

    .cta-card {
        padding: var(--space-xl);
    }

    .cta-buttons {
        flex-direction: column;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .glass-card {
        padding: var(--space-lg);
    }

    .case-study-metrics {
        grid-template-columns: 1fr;
    }

    .process-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   Print Styles
   ============================================================================ */
@media print {
    .navbar,
    .mobile-menu,
    .back-to-top,
    .scroll-progress,
    .hero-cta,
    .cta-section,
    #contact {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .glass-card {
        border: 1px solid #ccc;
        background: white;
        page-break-inside: avoid;
    }
}

/* ============================================================================
   Utility Classes
   ============================================================================ */
.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;
}

.text-center {
    text-align: center;
}

.hidden {
    display: none;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .glass-card {
        border: 2px solid var(--primary-text);
    }

    .btn-primary {
        border: 2px solid white;
    }

    .btn-secondary {
        border: 2px solid var(--primary-text);
    }
}