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

:root {
    /* Colors */
    --color-primary: #007AFF;
    --color-primary-dark: #0051D5;
    --color-primary-light: #4DA2FF;
    --color-secondary: #5856D6;
    --color-success: #34C759;
    --color-warning: #FF9500;
    --color-danger: #FF3B30;
    
    /* Grays */
    --color-gray-900: #1d1d1f;
    --color-gray-800: #2d2d2f;
    --color-gray-700: #3d3d3f;
    --color-gray-600: #4d4d4f;
    --color-gray-500: #6e6e73;
    --color-gray-400: #8e8e93;
    --color-gray-300: #c7c7cc;
    --color-gray-200: #e5e5ea;
    --color-gray-100: #f2f2f7;
    --color-white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    --gradient-secondary: linear-gradient(135deg, #5856D6 0%, #AF52DE 100%);
    --gradient-surface: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.01) 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 4rem;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Z-index */
    --z-base: 1;
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal-backdrop: 40;
    --z-modal: 50;
    --z-tooltip: 60;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-5xl); font-weight: 700; }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    line-height: 1.6;
}

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

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}

.btn-secondary:hover {
    background: var(--color-gray-200);
    transform: translateY(-1px);
}

.btn-white {
    background: var(--color-white);
    color: var(--color-gray-900);
}

.btn-white:hover {
    background: var(--color-gray-100);
    transform: translateY(-1px);
}

.btn-outline-white {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

.btn-outline-white:hover {
    background: var(--color-white);
    color: var(--color-gray-900);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    text-decoration: none;
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-gray-900);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-5xl) 0;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
}

.gradient-orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-primary);
    top: -200px;
    right: -200px;
}

.gradient-orb-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-secondary);
    bottom: -100px;
    left: -100px;
}

.gradient-orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #FF9500 0%, #FF3B30 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.03em;
}

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

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-gray-600);
    margin-bottom: var(--space-2xl);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
}

.hero-stats {
    display: flex;
    gap: var(--space-3xl);
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* Chat Preview */
.hero-visual {
    position: relative;
}

.chat-preview {
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-10deg);
    width: 400px;
    display: inline-block;
}

.chat-window {
    width: 400px;
    height: 500px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--color-white);
    font-weight: 500;
    width: 100%;
    box-sizing: border-box;
}

.chat-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.chat-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    margin-left: auto;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
}

.chat-messages {
    flex: 1;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    overflow-y: auto;
    background: var(--color-white);
    width: 100%;
    box-sizing: border-box;
}

.message {
    max-width: 80%;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    word-wrap: break-word;
}

.message-bot {
    background: var(--color-gray-100);
    align-self: flex-start;
}

.message-user {
    background: var(--color-primary);
    color: var(--color-white);
    align-self: flex-end;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--space-sm) 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-gray-400);
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

/* Chat Input */
.chat-input {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: 1px solid var(--color-gray-200);
    background: var(--color-white);
}

.chat-input-field {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    outline: none;
    transition: border-color var(--transition-base);
}

.chat-input-field:focus {
    border-color: var(--color-primary);
}

.chat-send-button {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.chat-send-button:hover {
    background: var(--color-primary-dark);
    transform: scale(1.05);
}

/* Sections */
section {
    padding: var(--space-5xl) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-4xl);
}

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

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* Features Section */
.features {
    background: var(--color-gray-100);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-2xl);
}

.feature-card {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
}

.lucide-icon {
    width: 32px;
    height: 32px;
    stroke-width: 2;
}

.feature-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
}

.feature-description {
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* Models Section */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-2xl);
}

.model-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

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

.model-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: var(--space-xl);
}

.model-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin-bottom: var(--space-md);
    background: var(--color-gray-50);
    border-radius: 12px;
    padding: var(--space-sm);
}

.model-logo svg,
.model-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    max-width: 60px;
    max-height: 60px;
}

.model-name {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-xs);
}

.model-provider {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.model-description {
    color: var(--color-gray-600);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.model-features {
    list-style: none;
}

.model-features li {
    padding: var(--space-sm) 0;
    padding-left: var(--space-xl);
    position: relative;
    color: var(--color-gray-700);
}

.model-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 700;
}

/* How It Works Section */
.how-it-works {
    background: var(--color-gray-100);
}

.steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
}

.step-number {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--color-white);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    border-radius: 50%;
    margin: 0 auto var(--space-lg);
}

.step-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
}

.step-description {
    color: var(--color-gray-600);
    line-height: 1.6;
}

.step-connector {
    flex: 0 0 60px;
    height: 2px;
    background: var(--color-gray-300);
    margin: 0 var(--space-lg);
    margin-bottom: 60px;
}

/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
    max-width: 1400px;
    margin: 0 auto;
}

@media (max-width: 1200px) {
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

.pricing-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    position: relative;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 500px;
}

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

.pricing-featured {
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.pricing-name {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--space-xs);
}

.price-currency {
    font-size: var(--font-size-xl);
    color: var(--color-gray-500);
}

.price-amount {
    font-size: var(--font-size-5xl);
    font-weight: 700;
}

.price-period {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--space-2xl);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    color: var(--color-gray-700);
    line-height: 1.5;
}

.check-icon {
    flex-shrink: 0;
    color: var(--color-success);
}

/* Testimonials Section */
.testimonials {
    background: var(--color-gray-100);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-2xl);
}

.testimonial-card {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.testimonial-rating {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.star {
    color: var(--color-warning);
}

.testimonial-text {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    color: var(--color-gray-700);
}

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

.testimonial-author strong {
    font-weight: 600;
    color: var(--color-gray-900);
}

.testimonial-author span {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* FAQ Section */
.faq {
    background: var(--color-gray-100);
    padding: var(--space-3xl) 0;
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-gray-200);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) 0;
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding-bottom: var(--space-lg);
}

.faq-answer p {
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* CTA Section */
.cta {
    background: var(--gradient-primary);
    color: var(--color-white);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.cta-description {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-2xl);
    opacity: 0.9;
}

.cta-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer-column {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.footer-description {
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-gray-800);
    border-radius: var(--radius-md);
    color: var(--color-gray-300);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-gray-700);
    color: var(--color-white);
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

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

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

.footer-links a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--color-gray-800);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-actions {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        background: var(--color-white);
        position: relative;
        padding-top: calc(80px + var(--space-3xl));
        padding-bottom: var(--space-4xl);
    }
    
    .hero::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 1px;
        background: var(--color-gray-200);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    }
    
    .hero-background {
        display: none;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
        line-height: 1.2;
        letter-spacing: -0.02em;
        margin-bottom: var(--space-md);
    }
    
    .hero-description {
        font-size: var(--font-size-lg);
        line-height: 1.6;
        color: var(--color-gray-600);
        margin-bottom: var(--space-2xl);
    }
    
    .gradient-text {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        font-weight: 700;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
    }
    
    .hero-actions .btn {
        padding: var(--space-lg) var(--space-2xl);
        font-size: var(--font-size-lg);
        font-weight: 600;
    }
    
    .steps {
        flex-direction: column;
        gap: var(--space-2xl);
    }
    
    .step-connector {
        display: none;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-featured {
        transform: none;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-stats {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
        margin-top: var(--space-3xl);
        padding-top: var(--space-2xl);
        border-top: 1px solid var(--color-gray-200);
    }
    
    .stat {
        text-align: center;
    }
    
    .stat-value {
        font-size: var(--font-size-2xl);
        font-weight: 700;
        color: var(--color-gray-900);
        line-height: 1;
    }
    
    .stat-label {
        font-size: var(--font-size-xs);
        color: var(--color-gray-500);
        margin-top: var(--space-xs);
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }
}

/* Mobile Menu Styles */
.mobile-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: var(--z-dropdown);
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-content {
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.mobile-menu .nav-link {
    display: block;
    padding: var(--space-md) 0;
    font-size: var(--font-size-lg);
}

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

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

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

body.menu-open {
    overflow: hidden;
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.nav.nav-hidden {
    transform: translateY(-100%);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.modal.active {
    opacity: 1;
}

.modal-content {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform var(--transition-base);
    position: relative;
    box-shadow: var(--shadow-2xl);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
}

.modal-close:hover {
    color: var(--color-gray-900);
    background: var(--color-gray-100);
}

.demo-video {
    margin-top: var(--space-xl);
    background: var(--color-gray-100);
    border-radius: var(--radius-lg);
    padding: var(--space-3xl);
    text-align: center;
}

.video-placeholder {
    color: var(--color-gray-500);
}

.video-placeholder svg {
    margin-bottom: var(--space-md);
}

/* Form Styles */
.contact-form {
    margin-top: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-gray-700);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-400);
}

/* Loading State */
.btn-loading {
    position: relative;
    color: transparent;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spinner 0.8s linear infinite;
}

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

/* Skip Navigation */
.skip-nav {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: var(--z-tooltip);
}

.skip-nav:focus {
    top: var(--space-md);
}

/* Accessibility Improvements */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}