/* ============================================
   eCTD SmartViewer - Website Styles
   CamusTech - Regulatory Technology Solutions
   ============================================ */

/* CSS Variables */
:root {
    /* Primary Colors - Deep Teal/Cyan theme */
    --color-primary: #0d9488;
    --color-primary-dark: #0f766e;
    --color-primary-light: #14b8a6;
    --color-primary-subtle: #ccfbf1;
    
    /* Accent Colors */
    --color-accent: #f59e0b;
    --color-accent-light: #fbbf24;
    
    /* Neutral Colors */
    --color-bg: #fafbfc;
    --color-bg-alt: #f1f5f9;
    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;
    
    /* Text Colors */
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-text-inverse: #ffffff;
    
    /* Border Colors */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    
    /* Status Colors */
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
    
    /* 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 -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

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

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--color-primary-dark);
}

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }

.lead {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-icon {
    width: 1.25rem;
    height: 1.25rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--color-text-inverse);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    transform: translateY(-2px);
}

.btn-nav {
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
}

.btn-resource {
    background: var(--color-primary-subtle);
    color: var(--color-primary-dark);
    padding: 0.75rem 1.5rem;
}

.btn-resource:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-resource svg {
    width: 1rem;
    height: 1rem;
}

.btn-full {
    width: 100%;
}

.btn-full svg {
    width: 1rem;
    height: 1rem;
}

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

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

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-text);
}

.logo:hover {
    color: var(--color-text);
}

.logo-icon {
    color: var(--color-primary);
    font-size: 1.5rem;
}

.logo-text .highlight {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(13, 148, 136, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgba(245, 158, 11, 0.1), transparent),
        linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(13, 148, 136, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: 10%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-primary-subtle);
    color: var(--color-primary-dark);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-subtitle-line {
    display: block;
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
}

.hero-subtitle-line.accent {
    color: var(--color-primary);
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--color-border-light);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: fadeInUp 0.6s ease-out 0.5s both;
}

.hero-scroll span {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-border);
    border-radius: 12px;
    margin: 0 auto;
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(10px); opacity: 0.3; }
}

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

/* ============================================
   Section Styles
   ============================================ */
.section {
    padding: var(--spacing-4xl) 0;
}

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

.section-header.centered {
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: var(--color-primary-subtle);
    color: var(--color-primary-dark);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

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

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
}

.section-header.centered .section-subtitle {
    margin: 0 auto;
}

/* ============================================
   About Section
   ============================================ */
.section-about {
    background: var(--color-surface);
}

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

.about-text p {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-secondary);
}

.about-text .lead {
    color: var(--color-text);
    font-weight: 500;
}

.about-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-2xl);
    background: var(--color-bg-alt);
    border-radius: var(--radius-2xl);
}

.visual-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.visual-card.active {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.visual-card.active .visual-icon svg {
    stroke: var(--color-text-inverse);
}

.visual-icon {
    width: 48px;
    height: 48px;
}

.visual-icon svg {
    width: 100%;
    height: 100%;
    stroke: var(--color-primary);
}

.visual-arrow {
    font-size: var(--font-size-2xl);
    color: var(--color-text-muted);
}

/* ============================================
   Problem & Solution Section
   ============================================ */
.section-problem {
    background: var(--color-bg-alt);
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.problem-card, .solution-card {
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
}

.problem-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.solution-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-inverse);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
}

.problem-icon {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

.solution-icon {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-text-inverse);
}

.card-header h3 {
    font-size: var(--font-size-xl);
}

.solution-card h3 {
    color: var(--color-text-inverse);
}

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

.challenge-list li, .solution-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    font-size: var(--font-size-base);
}

.list-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 700;
}

.challenge-list .list-icon {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

.solution-list .list-icon {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-text-inverse);
}

.solution-intro {
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

/* ============================================
   Features Section
   ============================================ */
.section-features {
    background: var(--color-surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-subtle);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-subtle);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--color-primary);
}

.feature-card h4 {
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
   How It Works Section
   ============================================ */
.section-how {
    background: var(--color-bg-alt);
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
}

.step {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    max-width: 280px;
    transition: all var(--transition-base);
}

.step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-primary-subtle);
    line-height: 1;
    margin-bottom: var(--spacing-md);
}

.step-content h4 {
    margin-bottom: var(--spacing-sm);
}

.step-content p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.step-icon {
    margin-top: var(--spacing-lg);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-subtle);
    border-radius: var(--radius-full);
}

.step-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-primary);
}

.step-connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-subtle), var(--color-primary), var(--color-primary-subtle));
}

.steps-note {
    text-align: center;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* ============================================
   Regions Section
   ============================================ */
.section-regions {
    background: var(--color-surface);
}

.regions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.region-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.region-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-subtle);
}

.region-flag {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.region-name {
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.region-agency {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============================================
   Audience Section
   ============================================ */
.section-audience {
    background: var(--color-bg-alt);
}

.audience-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
}

.audience-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.audience-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.audience-icon {
    font-size: 1.5rem;
}

.audience-card h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
}

/* ============================================
   Requirements Section
   ============================================ */
.section-requirements {
    background: var(--color-surface);
}

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

.requirements-info .section-tag {
    margin-bottom: var(--spacing-md);
}

.requirements-info .section-title {
    margin-bottom: var(--spacing-xl);
}

.requirements-box {
    background: var(--color-bg-alt);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
}

.requirements-box h4 {
    margin-bottom: var(--spacing-lg);
}

.requirements-box ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.requirements-box li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-text-secondary);
}

.requirements-box li svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-primary);
    flex-shrink: 0;
}

.installation-steps {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    color: var(--color-text-inverse);
}

.installation-steps h4 {
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-xl);
}

.install-step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.install-step:last-child {
    margin-bottom: 0;
}

.install-number {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.install-step strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.install-step p {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* ============================================
   Benefits Section
   ============================================ */
.section-benefits {
    background: var(--color-bg-alt);
}

.benefits-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
}

.benefit-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    min-width: 180px;
    transition: all var(--transition-base);
}

.benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.benefit-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.benefit-card h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
}

.benefit-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ============================================
   Download Section
   ============================================ */
.section-download {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-inverse);
    position: relative;
    overflow: hidden;
}

.section-download::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.section-download::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.download-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.download-content .section-tag {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-text-inverse);
}

.download-content .section-title {
    color: var(--color-text-inverse);
}

.download-description {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.download-info {
    display: flex;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.download-info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    opacity: 0.85;
}

.download-info-item svg {
    width: 20px;
    height: 20px;
}

.download-action {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    backdrop-filter: blur(10px);
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 1.25rem 2.5rem;
    background: var(--color-surface);
    color: var(--color-primary-dark);
    font-size: var(--font-size-lg);
    font-weight: 700;
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    color: var(--color-primary);
}

.btn-download svg {
    width: 24px;
    height: 24px;
}

.download-note {
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.download-note a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.download-note a:hover {
    color: var(--color-text-inverse);
}

/* ============================================
   Resources Section
   ============================================ */
.section-resources {
    background: var(--color-surface);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

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

.resource-card {
    padding: var(--spacing-2xl);
    background: var(--color-bg);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--color-border-light);
    text-align: center;
    transition: all var(--transition-base);
}

.resource-card:hover {
    border-color: var(--color-primary-subtle);
    box-shadow: var(--shadow-lg);
}

.resource-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-xl);
    border-radius: var(--radius-xl);
}

.resource-icon svg {
    width: 40px;
    height: 40px;
}

.zip-icon {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.zip-icon svg {
    stroke: white;
}

.pdf-icon {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.pdf-icon svg {
    stroke: white;
}

.video-icon {
    background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
}

.video-icon svg {
    stroke: white;
}

.btn-resource-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-resource-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-text-inverse);
}

.download-card {
    border: 2px solid var(--color-primary-subtle);
    background: var(--color-primary-subtle);
}

.resource-card h4 {
    margin-bottom: var(--spacing-md);
}

.resource-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   Roadmap Section
   ============================================ */
.section-roadmap {
    background: var(--color-bg-alt);
}

.roadmap-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

.roadmap-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--color-border);
    transition: all var(--transition-base);
}

.roadmap-item:hover {
    border-color: var(--color-primary);
    border-style: solid;
    transform: translateY(-2px);
}

.roadmap-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.roadmap-item h4 {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.roadmap-item p {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

/* ============================================
   About Company Section
   ============================================ */
.section-about-company {
    background: var(--color-surface);
}

.about-company-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-company-text .lead {
    color: var(--color-text);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

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

.about-company-values {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.value-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    font-weight: 600;
}

.value-icon {
    font-size: 1.5rem;
}

/* ============================================
   Contact Section
   ============================================ */
.section-contact {
    background: var(--color-bg-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info .section-tag {
    margin-bottom: var(--spacing-md);
}

.contact-info .section-title {
    margin-bottom: var(--spacing-lg);
}

.contact-info > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

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

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-subtle);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-primary);
}

.contact-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.contact-item span,
.contact-item a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.contact-item a:hover {
    color: var(--color-primary);
}

.contact-form-wrapper {
    background: var(--color-surface);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

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

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

.form-group label {
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem 1rem;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-subtle);
}

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

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-text);
    color: var(--color-text-inverse);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-brand .logo-text {
    color: var(--color-text-inverse);
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h5 {
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.footer-column a {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-text-inverse);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-address {
    font-size: var(--font-size-xs);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .regions-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .roadmap-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .about-content,
    .problem-grid,
    .requirements-grid,
    .about-company-content,
    .contact-grid,
    .resources-grid,
    .resources-grid-3,
    .download-wrapper {
        grid-template-columns: 1fr;
    }
    
    .download-action {
        text-align: center;
    }
    
    .about-visual {
        flex-wrap: wrap;
    }
    
    .steps-container {
        flex-direction: column;
    }
    
    .step-connector {
        width: 2px;
        height: 40px;
    }
    
    .step {
        max-width: 100%;
        width: 100%;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 640px) {
    :root {
        --container-padding: 1rem;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-ctas {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .features-grid,
    .regions-grid {
        grid-template-columns: 1fr;
    }
    
    .audience-grid {
        flex-direction: column;
    }
    
    .audience-card {
        width: 100%;
    }
    
    .benefits-grid {
        flex-direction: column;
    }
    
    .benefit-card {
        width: 100%;
    }
    
    .roadmap-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .about-company-values {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .hero-scroll {
        display: none;
    }
}

@media (max-width: 400px) {
    .roadmap-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   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: 0;
}

/* Print Styles */
@media print {
    .navbar,
    .hero-scroll,
    .contact-form-wrapper {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .section {
        padding: 2rem 0;
    }
}