:root {
    --bg-color: #050805;
    --text-cream: #F5F5DC;
    --text-muted: rgba(245, 245, 220, 0.65);
    --text-dim: rgba(245, 245, 220, 0.4);
    --border-color: rgba(245, 245, 220, 0.15);
    --border-light: rgba(245, 245, 220, 0.08);
    --accent: #A2BCA0; /* Subtle green accent */
    --alert: #E8B07D; /* Subtle amber for alerts */
    
    --font-heading: 'Inter', system-ui, sans-serif;
    --font-body: 'Newsreader', Georgia, serif;
    --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, Menlo, monospace;
    
    --max-width: 1200px;
}

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

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

/* Background grid overlay */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    background-image: 
        linear-gradient(var(--border-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.5;
}

/* Typography */
h1, h2, h3, h4, .nav-links a, .button, .cell-kicker, .hero-eyebrow, .signal-label {
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

p {
    font-size: 1.125rem;
    color: var(--text-muted);
}

a {
    color: inherit;
    text-decoration: none;
}

code, pre {
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

/* Layout Utilities */
.grid-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--border-color);
    background: rgba(5, 8, 5, 0.85);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-shell {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: 0.1em;
}

.brand-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    background: rgba(245, 245, 220, 0.05);
    overflow: hidden;
}

.brand-mark img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    font-size: 0.85rem;
    font-weight: 500;
}

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

.nav-action {
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
}

.nav-action:hover {
    background: var(--text-cream);
    color: var(--bg-color);
}

/* Hero Section */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    padding-top: 6rem;
    padding-bottom: 6rem;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.hero-content {
    max-width: 600px;
}

.hero-eyebrow {
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.15em;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    max-width: 90%;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.button {
    padding: 0.875rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid var(--text-cream);
}

.button-primary {
    background: var(--text-cream);
    color: var(--bg-color);
}

.button-primary:hover {
    background: transparent;
    color: var(--text-cream);
}

.button-secondary {
    background: transparent;
    color: var(--text-cream);
}

.button-secondary:hover {
    background: rgba(245, 245, 220, 0.1);
}

.signal-row {
    display: flex;
    gap: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.signal-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

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

.signal-value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-cream);
}

/* Terminal Showcase */
.terminal-showcase {
    border: 1px solid var(--border-color);
    background: rgba(5, 8, 5, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    height: 740px;
}

.terminal-header {
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.terminal-dots {
    display: flex;
    gap: 0.4rem;
}

.terminal-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-color);
}

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
}

.terminal-body {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.7;
    overflow-y: auto;
    flex-grow: 1;
}

.t-line { margin-bottom: 0.5rem; }
.t-user { color: var(--accent); }
.t-sys { color: var(--text-dim); }
.t-alert { color: var(--alert); }
.t-cursor {
    display: inline-block;
    width: 8px;
    height: 15px;
    background: var(--text-cream);
    vertical-align: middle;
    animation: blink 1s step-end infinite;
}

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

/* Blueprint Section (Features) */
.section-blueprint {
    max-width: var(--max-width);
    margin: 0 auto;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

.blueprint-header {
    padding: 4rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.blueprint-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
}

.blueprint-cell {
    padding: 3rem 2rem;
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    transition: background 0.3s ease;
}

.blueprint-cell:nth-child(3n) {
    border-right: none;
}

.blueprint-cell:hover {
    background: rgba(245, 245, 220, 0.03);
}

.cell-kicker {
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

/* Architecture Diagram */
.section-diagram {
    max-width: var(--max-width);
    margin: 0 auto;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.diagram-visual {
    padding: 4rem 2rem;
    display: flex;
    justify-content: center;
    overflow-x: auto;
}

/* Comparison Matrix */
.section-matrix {
    max-width: var(--max-width);
    margin: 0 auto;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.matrix-container {
    padding: 0;
    overflow-x: auto;
}

.blueprint-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.blueprint-table th, .blueprint-table td {
    padding: 1.5rem 2rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

.blueprint-table th:last-child, .blueprint-table td:last-child {
    border-right: none;
}

.blueprint-table th {
    color: var(--text-dim);
    font-weight: 700;
}

.blueprint-table td {
    color: var(--text-muted);
}

.blueprint-table .highlight-col {
    background: rgba(245, 245, 220, 0.03);
    color: var(--text-cream);
    font-weight: 700;
}

/* Footer */
.site-footer {
    max-width: var(--max-width);
    margin: 4rem auto 2rem;
    padding: 0 2rem;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    margin-bottom: 2rem;
}

.footer-copy {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
}

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

.copyright {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
}

/* Responsive */
@media (max-width: 992px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .blueprint-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .blueprint-cell:nth-child(2n) {
        border-right: none;
    }
    .blueprint-cell:nth-child(3n) {
        border-right: 1px solid var(--border-color);
    }
}

@media (max-width: 768px) {
    .nav-links a:not(.nav-action) {
        display: none;
    }
    .blueprint-grid {
        grid-template-columns: 1fr;
    }
    .blueprint-cell {
        border-right: none !important;
    }
    .footer-grid {
        flex-direction: column;
        gap: 1.5rem;
        align-items: flex-start;
    }
    .signal-row {
        flex-direction: column;
        gap: 1rem;
    }
}