/* CSS Variables for Theming */
:root {
    /* Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #191546;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --accent-primary: #53b0b8;
    --accent-secondary: #3AA1AF;
    --accent-dark: #13519B;
    --accent-purple: #7F3F89;
    --border-color: #dee2e6;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-primary: #0a0e27;
    --bg-secondary: #141b2d;
    --bg-tertiary: #1a2332;
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-muted: #6b7a95;
    --accent-primary: #53b0b8;
    --accent-secondary: #3AA1AF;
    --accent-dark: #13519B;
    --accent-purple: #9d5fa8;
    --border-color: #2d3748;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

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

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

/* Header Styles */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

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

.logo {
    height: 40px;
    width: auto;
}

.main-nav .nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.main-nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn {
    padding: 0.625rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

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

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--accent-primary);
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

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

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

.theme-toggle {
    background: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--accent-primary);
    color: white;
}

.theme-icon {
    transition: var(--transition);
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: none;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    transform: translateY(-100%);
    transition: var(--transition);
}

.mobile-nav.active {
    transform: translateY(0);
}

.mobile-nav-list {
    list-style: none;
}

.mobile-nav-list li {
    margin-bottom: 0.5rem;
}

.mobile-nav-list a {
    color: var(--text-primary);
    text-decoration: none;
    display: block;
    padding: 0.75rem;
    border-radius: 8px;
    transition: var(--transition);
}

.mobile-nav-list a:hover {
    background: var(--bg-tertiary);
}

/* Hero Section */
.hero-section {
    margin-top: 70px;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent-purple) 100%);
    opacity: 0.1;
    z-index: -1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 2rem;
}

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

.hero-features .feature-list {
    list-style: none;
    margin-bottom: 2rem;
}

.hero-features .feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-animation {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-svg {
    width: 100%;
    max-width: 500px;
    height: auto;
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

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

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

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

.feature-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.feature-icon {
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

/* Integration Section */
.integration-methods {
    display: grid;
    gap: 3rem;
    margin-bottom: 4rem;
}

.integration-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    align-items: center;
}

.integration-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.integration-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.integration-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

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

.integration-features li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.integration-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

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

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

.integration-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: linear-gradient(135deg, var(--accent-dark), var(--accent-purple));
    padding: 3rem;
    border-radius: 20px;
    color: white;
    align-items: center;
}

.showcase-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.showcase-description {
    font-size: 1.1rem;
    opacity: 0.9;
}

.showcase-svg {
    width: 100%;
    height: auto;
}

.api-example {
    margin-top: 2rem;
}

.api-example h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.api-example pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.api-example code {
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    color: #fff;
}

.integration-docs-link {
    margin-top: 1.5rem;
}

/* Providers Section */
.providers-section {
    background: var(--bg-secondary);
}

.providers-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.providers-search {
    max-width: 500px;
    margin: 0 auto 3rem;
}

.search-input {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
}

.providers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.provider-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.provider-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.provider-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.provider-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.provider-id {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.provider-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.category-badge {
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.provider-currency {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 1rem;
}

.currency-label {
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.currency-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.currency-badge {
    padding: 0.25rem 0.75rem;
    background: var(--accent-primary);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.providers-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Stats Section */
.stats-section {
    background: linear-gradient(135deg, var(--accent-dark), var(--accent-purple));
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

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

.stat-icon {
    margin-bottom: 1rem;
    opacity: 0.9;
}

.stat-number {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.contact-method:hover {
    transform: translateX(10px);
    background: var(--bg-tertiary);
}

.contact-icon {
    color: var(--accent-primary);
}

.contact-details h3 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

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

.contact-visual {
    display: flex;
    justify-content: center;
}

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

/* Footer */
.main-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo .logo {
    height: 40px;
    margin-bottom: 1rem;
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-nav {
        display: block;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-animation {
        display: none;
    }
    
    .integration-card {
        grid-template-columns: 1fr;
    }
    
    .integration-showcase {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

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

.provider-card {
    animation: fadeIn 0.5s ease-out;
}

/* Smooth transitions */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}