:root {
  --bg-primary: rgb(0, 0, 0);
  --bg-surface: rgb(12, 12, 12);
  --bg-elevated: rgb(24, 24, 24);
  --text-primary: rgb(252, 249, 243);
  --text-secondary: rgba(252, 249, 243, 0.6);
  --accent: #fcf9f3;
  --accent-hover: rgb(255, 255, 255);
  --accent-glow: rgba(252, 249, 243, 0.15);
  --border-subtle: rgba(252, 249, 243, 0.08);
  --border-strong: rgba(252, 249, 243, 0.2);
  --font-heading: "STIX Two Text", "STIX Two Text Fallback", serif;
  --font-body: "STIX Two Text", "STIX Two Text Fallback", serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  --text-xs: 0.75rem; --text-sm: 0.875rem; --text-base: 1rem;
  --text-lg: 1.125rem; --text-xl: 1.25rem; --text-2xl: 1.5rem;
  --text-3xl: 2rem; --text-hero: 3rem;
  --space-xs: 0.25rem; --space-sm: 0.5rem; --space-md: 1rem;
  --space-lg: 2rem; --space-xl: 4rem;
  --card-bg: var(--bg-surface); --card-border: var(--border-subtle); --card-radius: 0.5rem; --card-padding: var(--space-lg);
  --grid-gap: 1rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { background-color: rgb(0, 0, 0); scroll-behavior: smooth; }
body { font-family: var(--font-body); font-size: var(--text-base); line-height: 1.7; background: radial-gradient(ellipse at 50% 0%, rgb(10, 10, 14) 0%, rgb(0, 0, 0) 70%); color: var(--text-primary); min-height: 100vh; }
body::before { content: ''; position: fixed; top: 0; left: 0; width: 100%; height: 100%; opacity: 0.025; pointer-events: none; z-index: 9999; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E"); }
h1, h2, h3 { font-family: var(--font-heading); }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* Nav - fixed, blurred, matches main site */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(0, 0, 0, 0.9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border-subtle); }
.nav { display: flex; align-items: center; justify-content: space-between; padding: var(--space-sm) var(--space-md); max-width: 1920px; margin: 0 auto; }
.nav__logo { font-family: var(--font-heading); font-size: var(--text-lg); font-weight: 700; color: var(--accent); text-decoration: none; letter-spacing: 0.2em; }
.nav__links { list-style: none; display: flex; gap: var(--space-lg); align-items: center; }
.nav__links a { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-secondary); letter-spacing: 0.05em; transition: color 0.2s ease; }
.nav__links a:hover { color: var(--accent); text-decoration: none; }

/* Sections - generous padding like main site */
.page-section { padding: clamp(4rem, 8vh, 6rem) var(--space-md); max-width: 1000px; margin: 0 auto; }
.page-section__label { font-family: var(--font-mono); font-size: var(--text-xs); font-variant: all-small-caps; letter-spacing: 0.1em; color: var(--text-secondary); margin-bottom: var(--space-sm); }
.page-section h2 { font-size: clamp(2.75rem, 5.5vw, 5rem); font-weight: 600; letter-spacing: -0.025em; line-height: 1.1; color: var(--text-primary); margin-bottom: var(--space-lg); }
.page-section__narrative { font-size: var(--text-lg); color: var(--text-secondary); max-width: 60ch; line-height: 1.8; }
.page-section__narrative strong { font-weight: 700; color: var(--text-primary); }

/* Loop badge */
.loop-badge { text-align: center; padding: var(--space-md); margin-top: 3.5rem; color: var(--text-secondary); font-size: var(--text-sm); font-style: italic; border-bottom: 1px solid var(--border-subtle); }
.loop-badge a { color: var(--text-secondary); text-decoration: underline; }

/* Hero */
.hero { min-height: 60vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: var(--space-xl) var(--space-md); }
.hero h1 { font-size: clamp(3.5rem, 8vw, 7rem); font-weight: 600; letter-spacing: -0.03em; line-height: 1.05; background: linear-gradient(180deg, #fcf9f3 0%, #dcdce8 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; max-width: 16ch; margin-bottom: var(--space-md); }
.hero__sub { font-size: clamp(1rem, 1.5vw, var(--text-lg)); color: var(--text-secondary); max-width: 50ch; }
.hero__platform { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-secondary); letter-spacing: 0.08em; margin-top: var(--space-lg); border: 1px solid var(--border-strong); display: inline-block; padding: 0.35em 0.85em; border-radius: var(--card-radius); }

/* Problem - em-dash list */
.problem-list { list-style: none; display: flex; flex-direction: column; gap: var(--space-md); margin-top: var(--space-md); }
.problem-list li { padding-left: var(--space-lg); position: relative; color: var(--text-secondary); font-size: var(--text-lg); line-height: 1.6; }
.problem-list li::before { content: none; }

/* Evidence cards - matching main site */
.evidence-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--grid-gap); margin-top: var(--space-lg); }
.evidence-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--card-radius); padding: var(--card-padding); transition: transform 250ms ease, border-color 250ms ease, box-shadow 250ms ease; }
.evidence-card:hover { transform: translateY(-2px); border-color: rgba(252, 249, 243, 0.3); box-shadow: 0 4px 24px rgba(252, 249, 243, 0.06); }
.card-tags { font-family: var(--font-mono); font-size: var(--text-xs); font-variant: all-small-caps; letter-spacing: 0.1em; color: var(--text-secondary); margin-bottom: 0.5rem; }
.evidence-card h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); font-weight: 600; color: var(--text-primary); margin-bottom: var(--space-sm); }
.evidence-card p { font-size: var(--text-base); color: var(--text-secondary); line-height: 1.6; }

/* Flow steps - card-based */
.flow-grid { display: flex; flex-direction: column; gap: var(--space-sm); margin-top: var(--space-lg); }
.flow-card { display: flex; align-items: flex-start; gap: var(--space-md); background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--card-radius); padding: var(--space-lg); transition: border-color 250ms ease; }
.flow-card:hover { border-color: rgba(252, 249, 243, 0.2); }
.flow-num { font-family: var(--font-mono); font-size: var(--text-2xl); font-weight: 700; color: rgba(252, 249, 243, 0.15); flex-shrink: 0; line-height: 1; min-width: 2rem; }
.flow-content h3 { font-family: var(--font-mono); font-size: var(--text-base); font-weight: 600; color: var(--text-primary); margin-bottom: var(--space-xs); letter-spacing: 0.02em; }
.flow-content p { font-size: var(--text-base); color: var(--text-secondary); line-height: 1.6; }

/* Comparison table - dark background friendly */
.comparison-table-wrapper { overflow-x: auto; margin-top: var(--space-lg); }
.comparison-table { width: 100%; border-collapse: collapse; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--card-radius); }
.comparison-table thead { background: var(--bg-elevated); }
.comparison-table th { padding: var(--space-lg); text-align: left; font-family: var(--font-mono); font-size: var(--text-sm); font-weight: 600; color: var(--text-primary); border-bottom: 1px solid var(--border-strong); letter-spacing: 0.02em; }
.comparison-table td { padding: var(--space-lg); color: var(--text-secondary); font-size: var(--text-base); border-bottom: 1px solid var(--border-subtle); }
.comparison-table tbody tr:hover { background: rgba(252, 249, 243, 0.02); }
.comparison-table td strong { color: var(--text-primary); font-weight: 600; }

/* Demo terminal */
.demo-terminal { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--card-radius); overflow: hidden; margin-top: var(--space-lg); max-height: 400px; display: flex; flex-direction: column; }
.terminal__bar { background: var(--bg-elevated); padding: var(--space-sm) var(--space-md); display: flex; align-items: center; gap: var(--space-sm); border-bottom: 1px solid var(--border-subtle); }
.terminal__dot { width: 0.75rem; height: 0.75rem; border-radius: 50%; }
.terminal__dot--red { background: rgb(239, 68, 68); }
.terminal__dot--yellow { background: rgb(234, 179, 8); }
.terminal__dot--green { background: rgb(34, 197, 94); }
.terminal__title { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-secondary); margin-left: var(--space-md); }
.terminal__body { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--text-secondary); padding: var(--space-md); overflow-y: auto; flex: 1; white-space: pre-wrap; word-break: break-word; line-height: 1.6; }
.terminal__line { font-family: var(--font-mono); font-size: clamp(11px, 0.9vw, 13px); line-height: 1.6; white-space: pre; color: var(--text-secondary); }
.terminal__line--cmd { color: rgb(34, 197, 94); }
.terminal__line--out { color: var(--text-secondary); }
.terminal__line--summary { color: var(--accent); font-weight: 700; }
.terminal__line--pass { color: rgb(34, 197, 94); font-weight: 700; }
.terminal__line--fail { color: rgb(239, 68, 68); font-weight: 700; }
.terminal__line { animation: typeIn 0.05s steps(1) forwards; }

@keyframes typeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Badges */
.badges { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-md); }
.badge { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-secondary); border: 1px solid var(--border-strong); border-radius: var(--card-radius); padding: 0.35em 0.85em; letter-spacing: 0.02em; }

/* Results - stat cards */
.results-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--grid-gap); margin-top: var(--space-lg); }
.result-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--card-radius); padding: var(--card-padding); text-align: center; transition: border-color 250ms ease; }
.result-card:hover { border-color: rgba(252, 249, 243, 0.2); }
.result-stat { font-family: var(--font-mono); font-size: var(--text-3xl); font-weight: 700; color: var(--accent); display: block; margin-bottom: var(--space-xs); }
.result-label { font-size: var(--text-sm); color: var(--text-secondary); }
.results-link { text-align: center; margin-top: var(--space-md); font-size: var(--text-sm); color: var(--text-secondary); }

/* CTA */
.cta { text-align: center; padding: clamp(4rem, 10vh, 8rem) var(--space-md); }
.cta-button { display: inline-flex; align-items: center; gap: 0.5rem; background: var(--accent); color: var(--bg-primary); padding: 0.875rem 1.75rem; border-radius: 0.25rem; font-family: var(--font-mono); font-size: var(--text-sm); font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; text-decoration: none; transition: background 0.2s ease; }
.cta-button:hover { background: var(--accent-hover); color: var(--bg-primary); text-decoration: none; }

/* Footer */
footer { padding: clamp(4rem, 8vh, 6rem) var(--space-md); border-top: 1px solid var(--border-subtle); }
.footer__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--grid-gap); max-width: 800px; margin: 0 auto; }
.footer__col-header { font-family: var(--font-mono); font-variant: all-small-caps; letter-spacing: 0.1em; font-size: var(--text-xs); color: var(--text-secondary); margin-bottom: var(--space-sm); }
.footer__col p, .footer__col a { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-secondary); line-height: 1.8; }
.footer__col a { color: var(--accent); display: block; }

/* Scroll Reveal */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1), transform 0.8s cubic-bezier(0.16,1,0.3,1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* Hero entrance */
.hero { opacity: 0; transform: translateY(30px); transition: opacity 1s cubic-bezier(0.16,1,0.3,1), transform 1s cubic-bezier(0.16,1,0.3,1); }
.hero.entered { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .hero h1 { font-size: clamp(2.5rem, 8vw, 4rem); }
  .evidence-grid, .results-grid { grid-template-columns: 1fr; }
  .page-section { padding: clamp(2rem, 5vh, 4rem) var(--space-md); }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .comparison-table { font-size: var(--text-sm); }
  .comparison-table th, .comparison-table td { padding: var(--space-md); }
}