/* ==========================================
   CSS Variables (Custom Properties)
   ========================================== */
:root {
    /* Colors */
    --primary-blue: #2563eb;
    --primary-blue-dark: #1e40af;
    --primary-blue-light: #3b82f6;
    --primary-blue-lighter: #60a5fa;
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-light: #94a3b8;

    --bg-white: #ffffff;
    --bg-gray-50: #f8fafc;
    --bg-gray-100: #f1f5f9;

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

    /* Spacing */
    --container-max: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    color: var(--text-secondary);
}

/* ==========================================
   Utilities
   ========================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* Animation Classes */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

.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);
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* ==========================================
   Header
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

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

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    position: relative;
    padding: 180px 0 120px;
    background: linear-gradient(135deg, var(--bg-gray-50) 0%, var(--bg-white) 100%);
    overflow: hidden;
}

.hero-decoration {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--blue-100) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0.5;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    animation-delay: 0.2s;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

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

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* ==========================================
   Section Styles
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
   Services Section
   ========================================== */
.services {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-white);
}

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

.service-card {
    background: var(--bg-white);
    border: 1px solid var(--bg-gray-100);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--blue-100);
}

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

.service-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.service-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Process Section
   ========================================== */
.process {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(to bottom, var(--bg-white) 0%, var(--bg-gray-50) 100%);
}

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

.process-step {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.step-content {
    flex: 1;
    padding-top: var(--spacing-sm);
}

.step-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Features Section
   ========================================== */
.features {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-white);
}

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

.features-title {
    margin-bottom: var(--spacing-md);
}

.features-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.feature-check {
    flex-shrink: 0;
}

.feature-name {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-detail {
    color: var(--text-secondary);
    line-height: 1.7;
}

.features-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

/* ==========================================
   Trust Section
   ========================================== */
.trust {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(to bottom, var(--bg-gray-50) 0%, var(--bg-white) 100%);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.trust-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--bg-gray-100);
    transition: all var(--transition-base);
}

.trust-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.trust-badge {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.trust-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.trust-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Testimonials Section
   ========================================== */
.testimonials {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-white);
}

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

.testimonial-card {
    background: var(--bg-gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.testimonial-content {
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-primary);
    font-style: italic;
}

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

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

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

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

/* ==========================================
   Footer
   ========================================== */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, #1e293b 100%);
    color: white;
}

.footer-content {
    margin-bottom: var(--spacing-lg);
}

.footer-brand .logo-text {
    color: white;
}

.footer-tagline {
    margin-top: var(--spacing-sm);
    color: var(--blue-200);
    font-size: 0.875rem;
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--blue-200);
    font-size: 0.875rem;
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1024px) {
    .features-layout {
        grid-template-columns: 1fr;
    }

    .features-visual {
        order: -1;
    }

    .visual-card svg {
        width: 100%;
        height: auto;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero {
        padding: 140px 0 80px;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

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

    .process-step {
        flex-direction: column;
        text-align: center;
    }

    .step-number {
        width: 60px;
        height: 60px;
        font-size: 1.25rem;
        margin: 0 auto;
    }

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

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

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

    .header-content {
        height: 60px;
    }

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

    .hero {
        padding: 120px 0 60px;
    }

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

    .service-card,
    .trust-card,
    .testimonial-card {
        padding: var(--spacing-md);
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
    .header {
        position: static;
    }

    .hero-decoration {
        display: none;
    }

    .service-card,
    .trust-card,
    .testimonial-card {
        break-inside: avoid;
    }
}