/* ==================== */
/* CSS Variables & Reset */
/* ==================== */

:root {
    /* Color Palette - Premium Financial Terminal */
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1419;
    --bg-tertiary: #151b26;
    --accent-primary: #2962ff;
    --accent-secondary: #00ff88;
    --accent-warning: #ff9500;
    --accent-danger: #ff4444;
    --accent-info: #00ccff;
    
    /* Text Colors */
    --text-primary: #e8edf4;
    --text-secondary: #8b95a8;
    --text-muted: #5a6577;
    
    /* Border & Effects */
    --border-color: rgba(41, 98, 255, 0.15);
    --glow-primary: 0 0 20px rgba(41, 98, 255, 0.3);
    --glow-secondary: 0 0 15px rgba(0, 255, 136, 0.3);
    
    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    
    /* Spacing */
    --container-max: 1400px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-display);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==================== */
/* Hero Section */
/* ==================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(41, 98, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(41, 98, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridFloat 20s linear infinite;
}

@keyframes gridFloat {
    0% { transform: translateY(0); }
    100% { transform: translateY(50px); }
}

.hero .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background: rgba(41, 98, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
    animation: fadeInDown 0.8s ease-out;
}

.pulse-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-secondary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
    animation: fadeInUp 0.8s ease-out backwards;
}

.title-line:first-child {
    animation-delay: 0.2s;
}

.title-line.highlight {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation-delay: 0.4s;
    text-shadow: var(--glow-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out 0.8s backwards;
}

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

.stat-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    background: var(--accent-primary);
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 8px;
    border: 2px solid var(--accent-primary);
    transition: all 0.3s ease;
    animation: fadeInUp 0.8s ease-out 1s backwards;
    box-shadow: var(--glow-primary);
}

.cta-button:hover {
    background: transparent;
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(41, 98, 255, 0.5);
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== */
/* Simulator Section */
/* ==================== */

.simulator-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.terminal-wrapper {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.terminal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-md);
    background: rgba(41, 98, 255, 0.05);
    border-bottom: 1px solid var(--border-color);
}

.terminal-tabs {
    display: flex;
    gap: var(--spacing-sm);
}

.terminal-tab {
    padding: 0.5rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: 6px;
}

.terminal-tab.active {
    color: var(--accent-primary);
    background: rgba(41, 98, 255, 0.1);
}

.terminal-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.control-btn:hover {
    background: rgba(41, 98, 255, 0.1);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.chart-container {
    padding: var(--spacing-md);
}

.chart-section {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.chart-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.toggle-switch {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
}

.toggle-switch input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 40px;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    transition: all 0.3s ease;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--text-muted);
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: all 0.3s ease;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--accent-primary);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
    background: white;
}

.toggle-label {
    font-size: 0.75rem;
}

.chart-canvas {
    width: 100%;
    height: 300px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.rsi-section .chart-canvas {
    height: 150px;
}

.chart-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-md) 0;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid var(--border-color);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

/* ==================== */
/* Theory Section */
/* ==================== */

.theory-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-primary);
}

.theory-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.theory-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.formula-container {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.formula-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.formula {
    margin: var(--spacing-md) 0;
}

.formula-line {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    justify-content: center;
}

.formula-var {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--accent-primary);
}

.formula-eq {
    color: var(--text-muted);
}

.formula-expr {
    color: var(--text-primary);
}

.formula-fraction {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    margin: 0 0.5rem;
}

.fraction-top,
.fraction-bottom {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-primary);
}

.fraction-line {
    width: 100%;
    height: 2px;
    background: var(--accent-primary);
}

.formula-note {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: var(--spacing-sm);
}

.inline-var {
    color: var(--accent-primary);
    font-weight: 600;
}

.key-insights {
    margin-top: var(--spacing-lg);
}

.insights-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.insight-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(41, 98, 255, 0.05);
    border-left: 3px solid var(--accent-primary);
    border-radius: 8px;
    margin-bottom: var(--spacing-sm);
}

.insight-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.insight-icon.overbought {
    background: rgba(255, 149, 0, 0.2);
    border: 2px solid var(--accent-warning);
}

.insight-icon.oversold {
    background: rgba(0, 204, 255, 0.2);
    border: 2px solid var(--accent-info);
}

.insight-icon.neutral {
    background: rgba(41, 98, 255, 0.2);
    border: 2px solid var(--accent-primary);
}

.insight-content {
    flex: 1;
}

.insight-label {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

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

.theory-visual {
    position: sticky;
    top: var(--spacing-md);
}

.visual-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.visual-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.visual-title {
    font-family: var(--font-mono);
    font-weight: 600;
}

.visual-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: rgba(41, 98, 255, 0.2);
    border-radius: 4px;
    color: var(--accent-primary);
}

.theory-svg {
    width: 100%;
    height: 400px;
}

/* ==================== */
/* Enrollment Section */
/* ==================== */

.enrollment-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.enrollment-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.enrollment-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.benefits-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    color: var(--text-primary);
}

.benefit-icon {
    flex-shrink: 0;
}

.enrollment-form {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

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

.form-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.875rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(41, 98, 255, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-select {
    cursor: pointer;
}

.form-error {
    display: none;
    font-size: 0.875rem;
    color: var(--accent-danger);
    margin-top: 0.5rem;
}

.form-group.error .form-input,
.form-group.error .form-select {
    border-color: var(--accent-danger);
}

.form-group.error .form-error {
    display: block;
}

.submit-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 1rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--glow-primary);
}

.submit-button:hover {
    background: #1e4fd9;
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(41, 98, 255, 0.5);
}

.submit-button:active {
    transform: translateY(0);
}

.form-success {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--accent-secondary);
    border-radius: 8px;
    color: var(--accent-secondary);
    margin-top: var(--spacing-md);
}

.form-success.show {
    display: flex;
}

/* ==================== */
/* FAQ Section */
/* ==================== */

.faq-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-primary);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--accent-primary);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.faq-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

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

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ==================== */
/* Footer */
/* ==================== */

.footer {
    padding: var(--spacing-lg) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

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

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

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ==================== */
/* Responsive Design */
/* ==================== */

@media (max-width: 1024px) {
    .theory-grid,
    .enrollment-wrapper {
        grid-template-columns: 1fr;
    }
    
    .theory-visual {
        position: static;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .stat-divider {
        width: 40px;
        height: 1px;
    }
    
    .terminal-header {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .terminal-tabs {
        width: 100%;
        justify-content: space-between;
    }
    
    .chart-legend {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .terminal-tabs {
        flex-direction: column;
    }
    
    .control-btn {
        font-size: 0.75rem;
        padding: 0.5rem 0.75rem;
    }
}

/* ==================== */
/* Performance Optimizations */
/* ==================== */

/* GPU acceleration for animations */
.hero-grid,
.pulse-dot,
.title-line,
.faq-icon {
    will-change: transform;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}