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

:root {
    --primary-color: #667eea;
    --primary-dark: #5a6fd8;
    --secondary-color: #764ba2;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-accent: #edf2f7;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link.cta {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.nav-link.cta:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Burger Menu */
.burger-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: 8px;
}

.burger-menu span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.burger-menu.open span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.burger-menu.open span:nth-child(2) {
    opacity: 0;
}

.burger-menu.open span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    flex-direction: column;
    background-color: var(--bg-primary);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    padding: 80px 20px 20px 20px;
    z-index: 999;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

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

.mobile-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: color 0.3s ease;
    font-size: 1.1rem;
}

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

.mobile-link.cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem;
    border-radius: 0.5rem;
    border: none;
    margin-top: 1rem;
    text-align: center;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, #ffd89b 0%, #19547b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Phone Mockup */
.phone-mockup {
    position: relative;
    width: 280px;
    height: 560px;
    margin: 0 auto;
    background: #1a1a1a;
    border-radius: 2rem;
    padding: 1rem;
    box-shadow: var(--shadow-xl);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 1.5rem;
    overflow: hidden;
    position: relative;
}

.app-interface {
    padding: 2rem 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.app-header {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.code-display {
    margin-bottom: 2rem;
}

.code-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5rem;
    margin-bottom: 0.5rem;
    font-family: 'Monaco', 'Menlo', monospace;
}

.code-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.phone-number {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 500;
}

/* Sections */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* API Section */
.api {
    padding: 6rem 0;
    background: white;
}

.api-grid {
    display: grid;
    gap: 2rem;
}

.api-endpoint {
    background: var(--bg-secondary);
    border-radius: 1rem;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.endpoint-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.method {
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
}

.method.post {
    background: #48bb78;
    color: white;
}

.method.get {
    background: #4299e1;
    color: white;
}

.endpoint-path {
    font-family: 'Monaco', 'Menlo', monospace;
    font-weight: 600;
    color: var(--text-primary);
}

.endpoint-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.code-block {
    background: #1a202c;
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
    overflow-x: auto;
}

.code-block pre {
    color: #e2e8f0;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
}

.response {
    margin-top: 1rem;
}

.response pre {
    background: #2d3748;
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
    overflow-x: auto;
}

/* Usage Section */
.usage {
    padding: 6rem 0;
    background: white;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.usage-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

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

.usage-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.usage-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.usage-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Integration Section */
.integration {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.integration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 100%;
}

.integration-steps {
    margin-top: 2rem;
}

.step {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.step-number {
    width: 2rem;
    height: 2rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.step-content h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

.code-window {
    background: #1a202c;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    max-width: 100%;
}

.window-header {
    background: #2d3748;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.window-controls {
    display: flex;
    gap: 0.5rem;
}

.control {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
}

.control.red { background: #f56565; }
.control.yellow { background: #ed8936; }
.control.green { background: #48bb78; }

.window-title {
    color: #e2e8f0;
    font-size: 0.875rem;
    font-weight: 500;
}

.window-content {
    padding: 1.5rem;
    overflow-x: auto;
    max-width: 100%;
}

.window-content pre {
    color: #e2e8f0;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    max-width: 100%;
}

.window-content .comment { color: #68d391; }
.window-content .keyword { color: #f687b3; }
.window-content .string { color: #fbb6ce; }
.window-content .property { color: #90cdf4; }
.window-content .method { color: #f6ad55; }

/* CTA Section */
.cta {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 2rem;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 1rem;
}

.footer-description {
    color: #a0aec0;
    line-height: 1.6;
}

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

.footer-column h4 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
}

.footer-column a {
    display: block;
    color: #a0aec0;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #2d3748;
    padding-top: 2rem;
    text-align: center;
    color: #a0aec0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none !important;
    }
    
    .burger-menu {
        display: flex !important;
    }
    
    .mobile-menu-toggle {
        display: block !important;
    }
    
    .mobile-menu {
        display: none;
    }
    
    .mobile-menu.active {
        display: flex;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .phone-mockup {
        width: 240px;
        height: 480px;
    }
    
    .code-number {
        font-size: 2rem;
        letter-spacing: 0.25rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .usage-grid {
        grid-template-columns: 1fr;
    }
    
    .integration-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 6rem 0 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .app-interface {
        padding: 1.5rem 1rem;
    }
    
    .code-number {
        font-size: 1.5rem;
    }
    
    .features,
    .api,
    .usage,
    .integration,
    .cta {
        padding: 4rem 0;
    }
    
    .feature-card,
    .api-endpoint {
        padding: 1.5rem;
    }
    
    .mobile-menu {
        padding: 80px 15px 20px 15px;
    }
    
    .mobile-link {
        font-size: 1.2rem;
        padding: 1.2rem 0;
    }
    
    .mobile-link.cta {
        margin-top: 2rem;
        padding: 1.2rem;
        font-size: 1.1rem;
    }
    
    .code-window {
        max-width: 100%;
        overflow-x: auto;
    }
    
    .window-content {
        padding: 1rem;
    }
    
    .window-content pre {
        font-size: 0.75rem;
        line-height: 1.4;
        word-break: break-all;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

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

.feature-card,
.api-endpoint {
    animation: fadeInUp 0.6s ease-out;
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}