@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent: #22d3ee;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --bg-dark: #0f0f13;
    --bg-card: #18181f;
    --bg-card-hover: #1f1f28;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border: rgba(255,255,255,0.08);
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    --gradient-2: linear-gradient(135deg, #22d3ee 0%, #6366f1 100%);
    --gradient-3: linear-gradient(135deg, #10b981 0%, #22d3ee 100%);
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* HEADER */
header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(15,15,19,0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #fff;
}

.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #fff;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu span {
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: 0.3s;
}

/* HERO */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99,102,241,0.1);
    border: 1px solid rgba(99,102,241,0.3);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 24px;
    line-height: 1.1;
    color: #fff;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 24px;
    margin: 48px 0;
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s;
}

.stat-box:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    border-color: rgba(99,102,241,0.3);
}

.stat-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 8px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 48px;
}

.btn-primary {
    background: var(--gradient-1);
    color: #fff;
    padding: 16px 32px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(99,102,241,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99,102,241,0.4);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: #fff;
    padding: 16px 32px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.2);
}

/* SECTIONS */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.75rem);
    margin-bottom: 16px;
    color: #fff;
}

.section-header p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* CHARTS */
.chart-section {
    background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(24,24,31,0.5) 100%);
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 24px;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 28px;
    transition: all 0.3s;
}

.chart-card:hover {
    border-color: rgba(99,102,241,0.3);
    background: var(--bg-card-hover);
}

.chart-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.chart-title i {
    color: var(--primary-light);
}

/* BAR CHART */
.bar-chart {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.bar-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.bar-label {
    width: 120px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: right;
    flex-shrink: 0;
}

.bar-container {
    flex: 1;
    height: 32px;
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
    border-radius: 8px;
    transition: width 1s ease-out;
}

.bar-fill.primary {
    background: var(--gradient-1);
}

.bar-fill.accent {
    background: var(--gradient-2);
}

.bar-fill.green {
    background: var(--gradient-3);
}

.bar-fill.muted {
    background: linear-gradient(90deg, #3f3f46 0%, #52525b 100%);
}

/* DONUT CHART */
.donut-container {
    display: flex;
    align-items: center;
    gap: 32px;
}

.donut-chart {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.donut-center {
    position: absolute;
    width: 90px;
    height: 90px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.donut-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
}

.donut-label {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.donut-legend {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 4px;
}

/* LINE CHART */
.line-chart {
    height: 220px;
    position: relative;
    padding: 16px 0;
}

.line-chart-svg {
    width: 100%;
    height: 100%;
}

.chart-line {
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.chart-line.primary {
    stroke: var(--primary);
}

.chart-line.accent {
    stroke: var(--accent);
}

.chart-grid-line {
    stroke: rgba(255,255,255,0.05);
    stroke-width: 1;
}

.chart-axis-label {
    fill: var(--text-muted);
    font-size: 11px;
    font-family: 'Inter', sans-serif;
}

/* COMPARISON */
.comparison-section {
    background: var(--bg-dark);
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.comparison-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 28px;
    transition: all 0.3s;
}

.comparison-card:hover {
    border-color: rgba(99,102,241,0.3);
}

.comparison-card.featured {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(139,92,246,0.05) 100%);
}

.comparison-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.comparison-name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: #fff;
}

.comparison-badge {
    background: var(--gradient-1);
    color: #fff;
    padding: 4px 12px;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 100px;
}

.comparison-metrics {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.metric-name {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.metric-value {
    font-weight: 600;
    font-size: 0.9rem;
}

.metric-value.high {
    color: var(--accent-green);
}

.metric-value.medium {
    color: var(--accent-orange);
}

.metric-value.low {
    color: var(--text-muted);
}

/* FEATURES */
.features-section {
    background: var(--bg-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 32px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: rgba(99,102,241,0.3);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    color: #fff;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* STATS ROW */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin: 64px 0;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
}

.stat-card .stat-value {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.stat-card .stat-label {
    font-size: 0.95rem;
}

/* INFOGRAPHIC */
.infographic-section {
    background: linear-gradient(180deg, rgba(24,24,31,0.5) 0%, var(--bg-dark) 100%);
    padding: 100px 0;
}

.infographic-flow {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 180px;
}

.flow-number {
    width: 48px;
    height: 48px;
    background: var(--gradient-1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.flow-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #fff;
}

.flow-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--text-muted);
}

/* FAQ */
.faq-section {
    background: var(--bg-dark);
}

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

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    margin-bottom: 12px;
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item:hover {
    border-color: rgba(99,102,241,0.3);
}

.faq-question {
    padding: 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.faq-question:hover {
    background: var(--bg-card-hover);
}

.faq-question h3 {
    font-size: 1rem;
    font-weight: 500;
    color: #fff;
    flex: 1;
    padding-right: 16px;
}

.faq-toggle {
    width: 32px;
    height: 32px;
    background: rgba(99,102,241,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-light);
    transition: all 0.3s;
    flex-shrink: 0;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
    background: var(--gradient-1);
    color: #fff;
}

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

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

.faq-answer p {
    padding: 0 24px 24px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* FOOTER */
footer {
    background: rgba(15,15,19,0.95);
    border-top: 1px solid var(--border);
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

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

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    display: block;
    padding: 6px 0;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* MOBILE */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(15,15,19,0.98);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu {
        display: flex;
    }

    .hero {
        padding: 100px 24px 60px;
    }

    .charts-grid {
        grid-template-columns: 1fr;
    }

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

    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .infographic-flow {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .bar-label {
        width: 90px;
        font-size: 0.75rem;
    }
}

/* ANIMATIONS */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: all 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* SCROLLBAR */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-card-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #3f3f46;
}