:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-card: #16161f;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    --accent: #00d4aa;
    --accent-dim: rgba(0, 212, 170, 0.1);
    --accent-glow: rgba(0, 212, 170, 0.3);
    --positive: #00d4aa;
    --negative: #ff4757;
    --border: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.12);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 20px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 18px;
}

.logo-symbol {
    font-size: 24px;
    color: var(--accent);
    font-weight: 700;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-cta {
    background: var(--accent-dim);
    color: var(--accent) !important;
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid rgba(0, 212, 170, 0.2);
}

.nav-cta:hover {
    background: rgba(0, 212, 170, 0.15);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-dim), transparent);
}

.hero .container {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-eyebrow {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
    margin-bottom: 16px;
}

.hero h1 {
    font-size: clamp(42px, 6vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: #00e6b8;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--text-muted);
}

.btn-full {
    width: 100%;
}

.hero-metrics {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: border-color 0.2s;
}

.metric-card:hover {
    border-color: var(--border-light);
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 600;
    color: var(--accent);
}

.metric-label {
    font-size: 14px;
    color: var(--text-muted);
}

/* Sections */
.section {
    padding: 120px 0;
}

.section-dark {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-eyebrow {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 12px;
}

.section h2 {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Approach Grid */
.approach-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.approach-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s;
}

.approach-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.approach-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-dim);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: 20px;
}

.approach-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.approach-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Strategy Cards */
.strategy-showcase {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 24px;
}

.strategy-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    position: relative;
}

.strategy-card.featured {
    border-color: var(--accent);
}

.strategy-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 6px 12px;
    border-radius: 20px;
    background: var(--accent);
    color: var(--bg-primary);
}

.strategy-badge.muted {
    background: var(--bg-tertiary);
    color: var(--text-muted);
}

.strategy-header h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.strategy-market {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.strategy-desc {
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.strategy-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}

.stat {
    text-align: center;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.stat-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.stat-value.positive {
    color: var(--positive);
}

.stat-value.negative {
    color: var(--negative);
}

.stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.strategy-placeholder {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 14px;
}

.coming-soon {
    opacity: 0.6;
}

/* Philosophy */
.philosophy {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.philosophy-content h2 {
    font-size: 36px;
    margin-bottom: 24px;
    text-align: left;
}

.philosophy-content p {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 16px;
}

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

.data-stream {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    max-width: 300px;
    justify-content: center;
}

.data-stream span {
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 10px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--accent);
    animation: pulse 3s ease-in-out infinite;
}

.data-stream span:nth-child(2) { animation-delay: 0.5s; }
.data-stream span:nth-child(3) { animation-delay: 1s; }
.data-stream span:nth-child(4) { animation-delay: 1.5s; }
.data-stream span:nth-child(5) { animation-delay: 2s; }
.data-stream span:nth-child(6) { animation-delay: 2.5s; }

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

/* Footer */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.footer-disclaimer {
    font-size: 12px;
    color: var(--text-muted);
    max-width: 600px;
}

/* Responsive */
@media (max-width: 900px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

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

    .hero-metrics {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .metric-card {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }

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

    .strategy-showcase {
        grid-template-columns: 1fr;
    }

    .philosophy {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .philosophy-content h2 {
        text-align: center;
    }
}

@media (max-width: 600px) {
    .nav-links a:not(.nav-cta) {
        display: none;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .strategy-stats {
        grid-template-columns: 1fr;
    }
}

/* Delta-I Page Specific */
.page-header {
    padding: 140px 0 60px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.page-header .container {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 24px;
}

.page-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    margin-bottom: 8px;
}

.page-subtitle {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--text-muted);
}

.key-metrics {
    display: flex;
    gap: 32px;
}

.key-metric {
    text-align: right;
}

.key-metric-value {
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 600;
}

.key-metric-value.positive {
    color: var(--positive);
}

.key-metric-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.content-grid.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.content-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
}

.content-card.full-width {
    grid-column: 1 / -1;
}

.content-card h3 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* Data Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.data-table td {
    font-family: var(--font-mono);
    font-size: 14px;
}

.data-table tr:last-child td {
    border-bottom: none;
}

/* Chart Placeholder */
.chart-container {
    height: 280px;
    background: var(--bg-secondary);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.equity-curve {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-end;
    padding: 20px;
    gap: 4px;
}

.equity-bar {
    flex: 1;
    background: var(--accent);
    border-radius: 2px 2px 0 0;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.equity-bar:hover {
    opacity: 1;
}

/* Architecture Diagram */
.architecture {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.arch-layer {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 3px solid var(--accent);
}

.arch-layer-num {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent);
    font-weight: 600;
}

.arch-layer-name {
    font-weight: 600;
    margin-bottom: 2px;
}

.arch-layer-desc {
    font-size: 13px;
    color: var(--text-secondary);
}

.arch-arrow {
    text-align: center;
    color: var(--text-muted);
    font-size: 18px;
}

/* Session Pills */
.session-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.session-pill {
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    text-align: center;
}

.session-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.session-time {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--accent);
}

/* Validation */
.validation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.validation-item {
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    text-align: center;
}

.validation-value {
    font-family: var(--font-mono);
    font-size: 24px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 4px;
}

.validation-label {
    font-size: 12px;
    color: var(--text-muted);
}

/* Disclaimer */
.disclaimer {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-top: 60px;
}

.disclaimer p {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
}

@media (max-width: 900px) {
    .page-header .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .key-metrics {
        width: 100%;
        justify-content: flex-start;
    }

    .key-metric {
        text-align: left;
    }

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

    .content-grid.three-col {
        grid-template-columns: 1fr;
    }
}