:root {
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary: #6366f1;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1e293b;
    --light: #f3f4f6;
    --bg-color: #ffffff;
    --text-color: #334155;
    --text-light: #64748b;
    --text-dark: #1e293b;
    --border-color: #e5e7eb;
    --card-bg: #ffffff;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
    --border-radius: 0.5rem;
    --container-width: 1200px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    height: 100%;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-dark);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
}

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

h4 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
}

p {
    margin-bottom: 1.5rem;
}

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

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

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

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    margin-bottom: 0.5rem;
}

.section-title p {
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 1.5rem;
}

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

.mt-5 {
    margin-top: 2.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    font-size: 1rem;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

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

.btn-secondary:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

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

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    height: var(--header-height);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background-color: rgba(255, 255, 255, 0.98);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-dark);
}

.logo i {
    color: var(--primary);
    margin-right: 0.5rem;
    font-size: 1.8rem;
}

.nav {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    list-style: none;
    margin-right: 2rem;
}

.nav-link {
    margin: 0 1rem;
    color: var(--text-color);
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

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

.nav-link:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    cursor: pointer;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: white;
    padding: 2rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
    overflow-y: auto;
    display: none;
}

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

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

.mobile-nav-link {
    margin-bottom: 1.5rem;
}

.mobile-nav-link a {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
    display: block;
    padding: 0.5rem 0;
}

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

/* Hero Section */
.hero {
    padding: 8rem 0 5rem;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(243, 244, 246, 0.9));
    background-size: cover;
    background-position: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(99, 102, 241, 0.05));
    z-index: -1;
}

.hero-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    margin-right: 2rem;
}

.hero-title {
    margin-bottom: 1.5rem;
    font-weight: 800;
    color: var(--text-dark);
}

.hero-title span {
    color: var(--primary);
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--text-light);
}

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

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

.stat-item {
    flex: 1;
    min-width: 120px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.hero-image {
    flex: 1;
    max-width: 600px;
    position: relative;
}

.dashboard-preview {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transform: perspective(1000px) rotateY(-10deg) rotateX(5deg);
    transition: var(--transition);
}

.dashboard-preview:hover {
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg) translateY(-10px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Features Section */
.features {
    background-color: var(--light);
    position: relative;
    overflow: hidden;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%232563eb' fill-opacity='0.05' fill-rule='evenodd'%3E%3Ccircle cx='3' cy='3' r='3'/%3E%3Ccircle cx='13' cy='13' r='3'/%3E%3C/g%3E%3C/svg%3E");
    z-index: 0;
}

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

.feature-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--primary);
    font-size: 1.5rem;
}

.feature-title {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-description {
    color: var(--text-light);
    margin-bottom: 0;
}

/* Strategies Section */
.strategies {
    position: relative;
    overflow: hidden;
}

.strategies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.strategy-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
    transition: var(--transition);
    border-top: 3px solid var(--primary);
}

.strategy-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

.strategy-icon {
    color: var(--primary);
    font-size: 1.25rem;
    margin-right: 0.75rem;
}

.strategy-title {
    margin-bottom: 0;
    font-size: 1.2rem;
}

.strategy-description {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Why Backtesting Section */
.why-backtesting {
    background-color: var(--light);
    position: relative;
}

.why-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 3rem;
}

.why-content {
    flex: 1;
    min-width: 300px;
}

.why-image {
    flex: 1;
    min-width: 300px;
    text-align: center;
}

.why-image img {
    max-width: 500px;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

.why-list {
    list-style: none;
    margin-top: 2rem;
}

.why-item {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: flex-start;
}

.why-item-icon {
    color: var(--success);
    margin-right: 1rem;
    font-size: 1.25rem;
    margin-top: 0.25rem;
}

.why-item-content h4 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.why-item-content p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* Platform Comparison */
.comparison {
    position: relative;
    overflow: hidden;
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-top: 2rem;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    font-weight: 600;
    background-color: rgba(37, 99, 235, 0.05);
    color: var(--text-dark);
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
    font-weight: 500;
}

.comparison-table tr:nth-child(even) {
    background-color: rgba(243, 244, 246, 0.5);
}

.comparison-table tr:hover {
    background-color: rgba(37, 99, 235, 0.05);
}

.check-icon {
    color: var(--success);
    font-size: 1.25rem;
}

.times-icon {
    color: var(--danger);
    font-size: 1.25rem;
}

/* Performance Metrics */
.performance {
    background-color: var(--light);
    position: relative;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

.metric-icon {
    color: var(--primary);
    font-size: 1.25rem;
    margin-right: 0.75rem;
}

.metric-title {
    margin-bottom: 0;
    font-size: 1.1rem;
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.metric-description {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.performance-charts {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.chart-container {
    flex: 1;
    min-width: 300px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 1.5rem;
}

.chart-title {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    text-align: center;
}

.chart-placeholder {
    width: 100%;
    height: 300px;
    background-color: rgba(243, 244, 246, 0.7);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

/* Testimonials */
.testimonials {
    position: relative;
    overflow: hidden;
}

.testimonials-slider {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.testimonial-slide {
    display: none;
    text-align: center;
    padding: 2rem;
    animation: fadeIn 0.5s ease-in-out;
}

.testimonial-slide.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.testimonial-content {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-color);
    position: relative;
    margin-bottom: 1.5rem;
    padding: 0 1.5rem;
}

.testimonial-content::before,
.testimonial-content::after {
    content: '"';
    font-size: 3rem;
    color: var(--primary-light);
    position: absolute;
    opacity: 0.3;
}

.testimonial-content::before {
    top: -1rem;
    left: 0;
}

.testimonial-content::after {
    bottom: -2rem;
    right: 0;
}

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

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

.author-title {
    color: var(--text-light);
    font-size: 0.9rem;
}

.testimonial-controls {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    gap: 0.5rem;
}

.testimonial-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(37, 99, 235, 0.2);
    cursor: pointer;
    transition: var(--transition);
}

.testimonial-dot.active {
    background-color: var(--primary);
}

/* FAQ Section */
.faq {
    background-color: var(--light);
    position: relative;
}

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

.faq-list {
    list-style: none;
}

.faq-item {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
}

.faq-question:hover {
    background-color: rgba(37, 99, 235, 0.05);
}

.faq-question i {
    transition: var(--transition);
}

.faq-question.active i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-question.active + .faq-answer {
    padding: 0 1.5rem 1.5rem;
    max-height: 500px;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'%3E%3Ccircle cx='3' cy='3' r='3'/%3E%3Ccircle cx='13' cy='13' r='3'/%3E%3C/g%3E%3C/svg%3E");
    z-index: 0;
}

.cta-container {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title,
.cta-description {
    color: white;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

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

.btn-cta-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

.btn-cta-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-cta-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
}

/* Footer */
.footer {
    background-color: var(--dark);
    color: white;
    padding: 4rem 0 2rem;
    margin-top: auto;
}

.footer-container {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
}

.footer-col {
    flex: 1;
    min-width: 200px;
}

.footer-title {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

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

.footer-link {
    margin-bottom: 0.75rem;
}

.footer-link a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

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

.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-icon:hover {
    background-color: var(--primary);
    transform: translateY(-2px);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero-container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        margin-right: 0;
        margin-bottom: 2rem;
        max-width: 100%;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .why-container {
        flex-direction: column;
    }

    .why-image {
        order: -1;
        margin-bottom: 2rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 6rem 0 3rem;
    }

    .section {
        padding: 3rem 0;
    }

    .features-grid,
    .strategies-grid,
    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }

    .btn {
        width: 100%;
    }

    .footer-container {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

    .footer-col {
        width: 100%;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .why-item {
        flex-direction: column;
        text-align: center;
    }
    
    .why-item-icon {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        align-items: center;
    }

    .stat-item {
        width: 100%;
        text-align: center;
    }
    
    .hero-cta {
        flex-direction: column;
    }
}

/* Popular Strategies Section */
.popular-strategies {
    margin-top: 3rem;
    text-align: center;
}

.popular-strategies-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #374151;
    margin-bottom: 1.5rem;
}

.strategy-quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.strategy-quick-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.25rem 1rem;
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    text-decoration: none;
    color: #374151;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.strategy-quick-link:hover {
    transform: translateY(-4px);
    border-color: #2563eb;
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.15);
    color: #2563eb;
}

.strategy-quick-link i {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
    color: #2563eb;
}

.strategy-quick-link span {
    font-size: 0.9rem;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .strategy-quick-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .popular-strategies-title {
        font-size: 1.1rem;
    }

    .strategy-quick-link {
        padding: 1rem 0.75rem;
    }

    .strategy-quick-link i {
        font-size: 1.5rem;
    }

    .strategy-quick-link span {
        font-size: 0.85rem;
    }
}