/* =====================
   CSS Custom Properties
   ===================== */
:root {
    /* Color Palette */
    --primary-600: #4F46E5;
    --primary-700: #4338CA;
    --primary-800: #3730A3;
    --purple-600: #7C3AED;
    --purple-700: #6D28D9;

    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Transitions */
    --transition-fast: 200ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: #ffffff;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* =====================
   Typography
   ===================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--gray-600);
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--purple-600) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =====================
   Header
   ===================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: box-shadow var(--transition-base), padding var(--transition-base);
    padding: var(--spacing-md) 0;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    padding: var(--spacing-sm) 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.nav {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-item {
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-item:hover {
    color: var(--primary-600);
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-600), var(--purple-600));
    transition: width var(--transition-base);
}

.nav-item:hover::after {
    width: 100%;
}

/* =====================
   Hero Section
   ===================== */
.hero {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(180deg, var(--gray-50) 0%, #ffffff 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

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

.stat-number {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--primary-600);
    font-family: var(--font-heading);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-top: var(--spacing-xs);
}

.hero-visual {
    width: 100%;
    max-width: 600px;
}

.hero-visual svg {
    width: 100%;
    height: auto;
    filter: drop-shadow(var(--shadow-xl));
}

/* =====================
   Services Section
   ===================== */
.services {
    padding: var(--spacing-3xl) 0;
    background: #ffffff;
}

.section-header {
    margin-bottom: var(--spacing-3xl);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-600);
    background: #ffffff;
}

.service-icon {
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.service-description {
    color: var(--gray-600);
    line-height: 1.7;
}

/* =====================
   Features Section
   ===================== */
.features {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, #ffffff 0%, var(--gray-50) 100%);
}

.features-content {
    display: grid;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.feature-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
    padding: var(--spacing-lg);
    background: #ffffff;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.feature-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(8px);
}

.feature-number {
    font-size: 3rem;
    font-weight: 700;
    font-family: var(--font-heading);
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--purple-600) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
}

.feature-details {
    flex: 1;
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.feature-text {
    color: var(--gray-600);
    line-height: 1.7;
}

/* =====================
   Trust/Security Section
   ===================== */
.trust {
    padding: var(--spacing-3xl) 0;
    background: #ffffff;
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--spacing-xl);
}

.trust-badge {
    text-align: center;
    padding: var(--spacing-lg);
    transition: transform var(--transition-base);
}

.trust-badge:hover {
    transform: scale(1.05);
}

.trust-badge svg {
    margin: 0 auto var(--spacing-md);
}

.trust-badge h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--gray-900);
}

.trust-badge p {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* =====================
   Process Section
   ===================== */
.process {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, #ffffff 100%);
}

.process-timeline {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    gap: var(--spacing-xl);
}

.process-step {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-lg);
    align-items: center;
    padding: var(--spacing-xl);
    background: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
}

.process-step:hover {
    box-shadow: var(--shadow-xl);
    transform: scale(1.02);
}

.process-icon svg {
    display: block;
}

.process-content {
    flex: 1;
}

.process-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.process-description {
    color: var(--gray-600);
    line-height: 1.7;
}

.process-number {
    font-size: 4rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--gray-200);
    line-height: 1;
}

/* =====================
   Testimonials Section
   ===================== */
.testimonials {
    padding: var(--spacing-3xl) 0;
    background: #ffffff;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-card {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-600);
    background: #ffffff;
}

.testimonial-stars {
    font-size: 1.5rem;
    color: #FCD34D;
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.author-avatar {
    flex-shrink: 0;
}

.author-name {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.author-title {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* =====================
   Stats Section
   ===================== */
.stats-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--purple-600) 100%);
    color: white;
}

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

.stat-box {
    text-align: center;
    padding: var(--spacing-lg);
}

.stat-value {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    font-family: var(--font-heading);
    margin-bottom: var(--spacing-sm);
}

.stat-description {
    font-size: 1rem;
    opacity: 0.95;
}

/* =====================
   Footer
   ===================== */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    background: var(--gray-900);
    color: var(--gray-300);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    max-width: 400px;
}

.footer-brand .logo {
    margin-bottom: var(--spacing-md);
}

.footer-brand .logo-text {
    color: #ffffff;
}

.footer-tagline {
    color: var(--gray-400);
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-lg);
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-heading {
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: var(--spacing-xs);
}

.footer-link {
    font-size: 0.875rem;
    color: var(--gray-400);
    transition: color var(--transition-fast);
    cursor: pointer;
}

.footer-link:hover {
    color: var(--primary-600);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-700);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* =====================
   Animations
   ===================== */
.fade-in {
    animation: fadeIn var(--transition-slow) ease-out;
}

.fade-in-delayed {
    animation: fadeIn var(--transition-slow) ease-out 0.3s backwards;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Document Stack Animation */
.document-stack {
    animation: floatAnimation 3s ease-in-out infinite;
}

@keyframes floatAnimation {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* =====================
   Responsive Design
   ===================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .hero-visual {
        margin: 0 auto;
    }

    .nav {
        gap: var(--spacing-lg);
    }

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

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero {
        padding: calc(60px + var(--spacing-xl)) 0 var(--spacing-xl);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

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

    .trust-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: var(--spacing-md);
    }

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

    .process-icon {
        margin: 0 auto;
    }

    .process-number {
        order: -1;
    }

    .feature-item {
        flex-direction: column;
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .logo-text {
        font-size: 1rem;
    }

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

    .section-title {
        font-size: 1.75rem;
    }

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

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

/* =====================
   Utility Classes
   ===================== */
.text-center {
    text-align: center;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--purple-600) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}