:root {
    --bg-dark: #0a0e16;
    --bg-darker: #050810;
    --text-primary: #e8edf4;
    --text-secondary: #9ba5b8;
    --accent-gold: #d4af37;
    --accent-gold-dim: #9b8229;
    --accent-blue: #4a90e2;
    --accent-green: #2dd4bf;
    --border-subtle: #1a2332;
    --border-bright: #2a3648;
    --card-bg: #0f1623;
    --code-bg: #1a1f2e;
}

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

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

    /* Background Pattern */
    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: radial-gradient(circle at 20% 30%, rgba(74, 144, 226, 0.03) 0%, transparent 50%), radial-gradient(circle at 80% 70%, rgba(212, 175, 55, 0.02) 0%, transparent 50%);
        pointer-events: none;
        z-index: 0;
    }

    /* Grid overlay */
    body::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: linear-gradient(var(--border-subtle) 1px, transparent 1px), linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
        background-size: 50px 50px;
        opacity: 0.3;
        pointer-events: none;
        z-index: 0;
    }

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

/* Navigation */
nav {
    padding: 2rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 22, 0.8);
}

    nav a:hover {
        color: var(--accent-gold) !important;
    }

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--accent-gold);
    letter-spacing: -0.02em;
    text-decoration: none;
}

.logo-icon {
    height: 32px;
    width: auto;
}

.nav-cta {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dim));
    color: var(--bg-dark);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.9rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    font-weight: 500;
}

    .nav-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(212, 175, 55, 0.3);
    }

/* Hero Section */
.hero {
    padding: 8rem 0 6rem;
    text-align: center;
    position: relative;
}

.hero-label {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-gold);
    border: 1px solid var(--accent-gold-dim);
    padding: 0.5rem 1rem;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out;
}

h1 {
    font-family: 'Crimson Pro', serif;
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto 3rem;
    line-height: 1.7;
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.6s backwards;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'IBM Plex Mono', monospace;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dim));
    color: var(--bg-dark);
    border: none;
    font-weight: 500;
}

    .btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4);
    }

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

    .btn-secondary:hover {
        border-color: var(--accent-gold);
        color: var(--accent-gold);
        transform: translateY(-3px);
    }

/* Section Titles */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

h2 {
    font-family: 'Crimson Pro', serif;
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 2rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin-bottom: 4rem;
}

/* Problem Section */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.problem-card {
    background: var(--card-bg);
    border: 1px solid var(--border-subtle);
    padding: 2rem;
    border-radius: 8px;
    transition: all 0.3s;
}

    .problem-card:hover {
        border-color: var(--accent-gold-dim);
        transform: translateY(-5px);
    }

    .problem-card h3 {
        font-family: 'Crimson Pro', serif;
        font-size: 1.5rem;
        margin-bottom: 1rem;
        color: var(--text-primary);
    }

    .problem-card p {
        color: var(--text-secondary);
        line-height: 1.7;
    }

/* System Diagram */
.system-diagram {
    background: var(--card-bg);
    border: 1px solid var(--border-bright);
    border-radius: 12px;
    padding: 3rem;
    margin: 4rem 0;
    position: relative;
    overflow: hidden;
}

    .system-diagram::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
    }

.cycle-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.cycle-step {
    background: var(--code-bg);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 2rem;
    position: relative;
    transition: all 0.3s;
}

    .cycle-step:hover {
        border-color: var(--accent-gold);
        transform: scale(1.02);
    }

.step-number {
    position: absolute;
    top: -12px;
    left: 20px;
    background: var(--bg-dark);
    color: var(--accent-gold);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--accent-gold);
    border-radius: 12px;
}

.cycle-step h4 {
    font-family: 'IBM Plex Mono', monospace;
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    margin-top: 0.5rem;
}

.cycle-step .agent-name {
    color: var(--accent-blue);
    font-size: 0.85rem;
    font-family: 'IBM Plex Mono', monospace;
    margin-bottom: 1rem;
    display: block;
}

.cycle-step p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Belief Hierarchy */
.belief-hierarchy {
    background: var(--card-bg);
    border: 1px solid var(--border-bright);
    border-radius: 12px;
    padding: 3rem;
    margin: 3rem 0;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.9rem;
}

.belief-level {
    margin: 2rem 0;
    padding-left: 2rem;
    border-left: 2px solid var(--border-subtle);
    transition: all 0.3s;
}

    .belief-level:hover {
        border-left-color: var(--accent-gold);
    }

.belief-title {
    color: var(--accent-gold);
    font-weight: 500;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.belief-statement {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.belief-meta {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.confidence-bar {
    display: inline-block;
    width: 60px;
    height: 4px;
    background: var(--border-subtle);
    border-radius: 2px;
    overflow: hidden;
    vertical-align: middle;
    margin: 0 0.5rem;
}

.confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-green));
    transition: width 1s ease-out;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 2.5rem;
    transition: all 0.3s;
}

    .feature-card:hover {
        border-color: var(--accent-gold);
        transform: translateY(-5px);
    }

.feature-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-gold-dim), var(--accent-gold));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-family: 'Crimson Pro', serif;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

/* Code Block */
.code-example {
    background: var(--code-bg);
    border: 1px solid var(--border-bright);
    border-radius: 8px;
    padding: 2rem;
    margin: 3rem 0;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    overflow-x: auto;
}

.code-line {
    color: var(--text-secondary);
    line-height: 1.8;
}

.code-comment {
    color: var(--accent-blue);
}

.code-highlight {
    color: var(--accent-gold);
}

.code-success {
    color: var(--accent-green);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--card-bg), var(--bg-darker));
    border: 1px solid var(--border-bright);
    border-radius: 12px;
    padding: 5rem 3rem;
    text-align: center;
    margin: 6rem 0;
    position: relative;
    overflow: hidden;
}

    .cta-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle at 50% 50%, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
        pointer-events: none;
    }

    .cta-section h2 {
        position: relative;
        z-index: 1;
    }

    .cta-section p {
        position: relative;
        z-index: 1;
        color: var(--text-secondary);
        font-size: 1.2rem;
        max-width: 600px;
        margin: 0 auto 2rem;
    }

    .cta-section .btn-primary {
        position: relative;
        z-index: 1;
    }

/* Footer */
footer {
    border-top: 1px solid var(--border-subtle);
    padding: 3rem 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

    50% {
        opacity: 0.5;
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s, transform 0.6s;
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 4rem 0 3rem;
    }

    .section {
        padding: 4rem 0;
    }

    .feature-grid,
    .problem-grid {
        grid-template-columns: 1fr;
    }

    .cycle-container {
        grid-template-columns: 1fr;
    }

    .system-diagram,
    .belief-hierarchy {
        padding: 2rem;
    }

    .cta-section {
        padding: 3rem 2rem;
    }
}