:root {
    --color-bg-dark: #0a0e1a;
    --color-bg-gradient: linear-gradient(135deg, #1a1d29 0%, #0a0e1a 100%);
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-accent: #10b981;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-card: #1e293b;
    --color-shadow: rgba(0,0,0,0.5);
    --color-border: rgba(148, 163, 184, 0.1);
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
}

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

body {
    background: var(--color-bg-dark);
    color: var(--color-text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
    line-height: 1.6;
    font-size: 16px;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Screen Reader Only */
.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;
}

/* Header Navigation */
header {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Main Content */
main {
    min-height: 100vh;
}

/* Hero Section */
.hero-section {
    min-height: 95vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-gradient);
    padding: 80px 20px;
    position: relative;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1400px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 2;
}

/* Left Side - Main Content */
.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding-right: 40px;
}

.hero-content h1 {
    font-size: 4.5rem;
    font-weight: 800;
    letter-spacing: -2px;
    color: var(--color-text-primary);
    margin-bottom: 24px;
    line-height: 1.1;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-content .subtitle {
    font-size: 1.4rem;
    color: var(--color-text-secondary);
    font-weight: 400;
    margin-bottom: 32px;
    line-height: 1.5;
}

/* Hero Benefits List */
.hero-benefits {
    list-style: none;
    margin-bottom: 40px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.hero-benefits li {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.hero-benefits li::before {
    content: '✓';
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.2rem;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
    max-width: 400px;
}

/* Button Styles */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
    color: var(--color-text-primary);
    border: none;
    border-radius: 12px;
    padding: 20px 32px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.3);
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.5);
    background: linear-gradient(135deg, var(--color-primary-hover) 0%, var(--color-primary) 100%);
}

.btn-secondary {
    background: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    border-radius: 12px;
    padding: 18px 32px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.2);
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-secondary:hover {
    background: var(--color-accent);
    color: var(--color-bg-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(16, 185, 129, 0.4);
}

/* Right Side - Visual Space */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 500px;
    background: rgba(30, 41, 59, 0.4);
    border-radius: 24px;
    border: 1px solid var(--color-border);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.hero-visual::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

/* Stock Heatmap Styles */
.stock-heatmap {
    width: 100%;
    height: 100%;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    z-index: 2;
}

.heatmap-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.heatmap-header h2 {
    color: var(--color-text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.market-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    flex: 1;
    min-height: 300px;
}

.stock-tile {
    background: var(--color-card);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.stock-tile::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    transition: opacity 0.3s ease;
}

.stock-tile:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border-color: var(--color-accent);
}

.stock-tile.positive::before {
    background: var(--color-success);
}

.stock-tile.negative::before {
    background: var(--color-error);
}

.stock-symbol {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-text-primary);
    margin-bottom: 4px;
}

.stock-price {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 8px;
}

.stock-change {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    align-self: flex-start;
}

.stock-change.positive {
    color: var(--color-success);
    background: rgba(16, 185, 129, 0.15);
}

.stock-change.negative {
    color: var(--color-error);
    background: rgba(239, 68, 68, 0.15);
}

.stock-volume {
    font-size: 0.8rem;
    color: rgba(248, 250, 252, 0.6);
    margin-top: 4px;
}

.heatmap-legend {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 12px;
}

.legend-gradient {
    width: 120px;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--color-error) 0%, #f97316 25%, var(--color-text-secondary) 50%, #22c55e 75%, var(--color-success) 100%);
}

/* Explanation Section */
.explanation-section {
    background: var(--color-bg-dark);
    padding: 100px 20px;
}

.explanation-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.explanation-left h2 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 32px;
    line-height: 1.2;
}

.explanation-left h3 {
    font-size: 1.8rem;
    color: var(--color-accent);
    margin-bottom: 20px;
    font-weight: 600;
}

.explanation-left p {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.why-section {
    background: rgba(30, 41, 59, 0.5);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid var(--color-border);
    margin-bottom: 40px;
}

.why-section ul {
    list-style: none;
}

.why-section li {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    padding-left: 24px;
    position: relative;
    line-height: 1.6;
}

.why-section li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.4rem;
}

.why-section li strong {
    color: var(--color-text-primary);
}

/* FAQ Section */
.faq-section {
    margin-top: 40px;
}

.faq-section h3 {
    font-size: 1.6rem;
    color: var(--color-accent);
    margin-bottom: 24px;
    font-weight: 600;
}

.faq-section details {
    background: rgba(30, 41, 59, 0.3);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
}

.faq-section summary {
    padding: 20px;
    cursor: pointer;
    font-weight: 600;
    color: var(--color-text-primary);
    transition: background-color 0.2s ease;
}

.faq-section summary:hover {
    background: rgba(30, 41, 59, 0.5);
}

.faq-section details p {
    padding: 0 20px 20px;
    margin: 0;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.explanation-right {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.capabilities-card {
    background: rgba(30, 41, 59, 0.7);
    border-radius: 20px;
    padding: 36px;
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.capabilities-card h3 {
    font-size: 1.8rem;
    color: var(--color-accent);
    margin-bottom: 24px;
    font-weight: 600;
}

.capabilities-grid {
    display: grid;
    gap: 16px;
}

.capability-item {
    background: rgba(37, 99, 235, 0.1);
    border-radius: 12px;
    padding: 20px;
    border-left: 4px solid var(--color-primary);
}

.capability-item h4 {
    color: var(--color-text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.capability-item p {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* Strategies Section */
.strategies-section {
    background: rgba(30, 41, 59, 0.3);
    padding: 80px 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.strategies-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: 48px;
}

.strategies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.strategy-card {
    background: var(--color-card);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.strategy-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.3);
}

.strategy-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.strategy-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.strategy-link {
    display: inline-flex;
    align-items: center;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

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

/* Footer */
footer {
    background: var(--color-bg-dark);
    border-top: 1px solid var(--color-border);
    padding: 60px 20px 20px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: var(--color-text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 12px;
}

.footer-section a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: var(--color-text-primary);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-secondary);
}

.footer-bottom a {
    color: var(--color-accent);
    text-decoration: none;
}

/* Animation Styles */
.loading-pulse {
    animation: pulse-opacity 1.5s ease-in-out infinite alternate;
}

@keyframes pulse-opacity {
    from { opacity: 0.6; }
    to { opacity: 1; }
}

.value-updating {
    animation: value-flash 0.8s ease-in-out;
}

@keyframes value-flash {
    0% { transform: scale(1); }
    30% { transform: scale(1.05); background-color: rgba(255, 255, 255, 0.1); }
    100% { transform: scale(1); }
}

.tile-updating {
    animation: tile-glow 0.6s ease-in-out;
}

@keyframes tile-glow {
    0% { box-shadow: 0 0 0 rgba(255, 255, 255, 0); }
    50% { box-shadow: 0 0 20px rgba(255, 255, 255, 0.3); }
    100% { box-shadow: 0 0 0 rgba(255, 255, 255, 0); }
}

.fade-in {
    opacity: 0;
    transform: translateY(10px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 1200px) {
    .hero-container,
    .explanation-container {
        gap: 60px;
    }
    
    .hero-content h1 {
        font-size: 3.5rem;
    }
    
    .nav-container {
        padding: 0 20px;
    }
}

@media (max-width: 968px) {
    .hero-container,
    .explanation-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-content {
        text-align: center;
        padding-right: 0;
    }

    .hero-content h1 {
        font-size: 3rem;
    }

    .hero-content .subtitle {
        font-size: 1.3rem;
    }

    .explanation-left h2 {
        font-size: 2.5rem;
    }

    .heatmap-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .nav-links {
        gap: 20px;
    }
    
    .strategies-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-section {
        padding: 40px 20px;
        min-height: 90vh;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content .subtitle {
        font-size: 1.2rem;
    }

    .hero-benefits li {
        font-size: 1rem;
    }

    .btn-primary,
    .btn-secondary {
        padding: 16px 24px;
        font-size: 1.1rem;
    }

    .explanation-section {
        padding: 60px 20px;
    }

    .explanation-left h2 {
        font-size: 2rem;
    }

    .explanation-left p {
        font-size: 1.1rem;
    }

    .heatmap-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stock-heatmap {
        padding: 16px;
    }

    .heatmap-header h2 {
        font-size: 1.2rem;
    }
    
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 16px 20px;
        gap: 16px;
    }
    
    .nav-links {
        justify-content: center;
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .strategies-section {
        padding: 60px 20px;
    }
    
    .strategies-section h2 {
        font-size: 2rem;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-section {
        text-align: center;
    }
}