:root {
  --paper: #f3f2ec;
  --ink: #141412;
  --muted: #66665f;
  --line: #cbc9be;
  --lime: #d9ff43;
  --blue: #2146f3;
  --blue-dark: #1735c7;
  --white: #fffef8;
  --max: 1440px;
  --pad: clamp(1.25rem, 4vw, 4.5rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 1rem; left: 1rem; z-index: 100; padding: .75rem 1rem; background: var(--lime); transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  width: 100%;
  height: 76px;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(20,20,18,.16);
  background: rgba(243,242,236,.88);
  backdrop-filter: blur(16px);
  transition: transform .25s ease, background .25s ease;
}
.site-header.is-hidden { transform: translateY(-100%); }
.wordmark { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; font-weight: 800; font-size: .78rem; letter-spacing: .12em; }
.wordmark-mark { width: 15px; height: 15px; border: 4px solid var(--blue); border-radius: 50%; position: relative; }
.wordmark-mark::after { content: ""; position: absolute; width: 4px; height: 4px; background: var(--blue); border-radius: 50%; inset: 50% auto auto 50%; transform: translate(-50%,-50%); }
.site-nav { display: flex; gap: clamp(1.5rem, 3vw, 3.5rem); align-items: center; }
.site-nav a { text-decoration: none; font-weight: 700; font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; }
.site-nav a:hover { color: var(--blue); }
.menu-button { display: none; border: 0; background: transparent; width: 42px; height: 42px; padding: 10px; }
.menu-button > span:not(.sr-only) { display: block; width: 100%; height: 2px; background: var(--ink); margin: 6px 0; transition: transform .2s ease; }

.hero { min-height: min(920px, 100svh); position: relative; overflow: hidden; padding: clamp(8.5rem, 14vw, 11rem) var(--pad) clamp(4rem, 8vw, 7rem); display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); align-items: center; gap: clamp(2rem, 7vw, 8rem); border-bottom: 1px solid var(--line); }
.hero-grid { position: absolute; inset: 76px 0 0; pointer-events: none; opacity: .32; background-image: linear-gradient(to right, var(--line) 1px, transparent 1px), linear-gradient(to bottom, var(--line) 1px, transparent 1px); background-size: min(9vw, 120px) min(9vw, 120px); mask-image: linear-gradient(to bottom, black, transparent 80%); }
.hero-copy, .hero-visual { position: relative; z-index: 1; min-width: 0; }
.eyebrow { display: flex; align-items: center; gap: 1rem; margin: 0 0 2rem; color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.eyebrow span:first-child { color: var(--ink); background: var(--lime); padding: .45rem .65rem; }
.hero h1 { margin: 0; max-width: 790px; font-size: clamp(4.4rem, 7.4vw, 7.2rem); line-height: .78; letter-spacing: -.075em; text-transform: uppercase; font-weight: 900; }
.hero h1 em, .intro h2 em { color: var(--blue); font-family: Georgia, 'Times New Roman', serif; text-transform: lowercase; font-weight: 400; }
.hero-deck { max-width: 610px; margin: 2.6rem 0 2rem; font-size: clamp(1.05rem, 1.5vw, 1.35rem); line-height: 1.45; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.button { display: inline-flex; justify-content: space-between; gap: 2rem; min-width: 210px; padding: 1rem 1.15rem; border: 1px solid var(--ink); text-decoration: none; text-transform: uppercase; font-weight: 800; font-size: .72rem; letter-spacing: .06em; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-3px); }
.button-primary { background: var(--ink); color: var(--white); }
.button-primary:hover { background: var(--blue); border-color: var(--blue); }
.button-secondary { background: transparent; }
.button-secondary:hover { background: var(--white); }
.hero-visual { justify-self: end; width: min(100%, 580px); }
.prompt-card { transform: rotate(2.5deg); background: var(--ink); padding: .75rem; box-shadow: 2rem 2rem 0 var(--blue); }
.image-frame { height: clamp(330px, 46vw, 570px); overflow: hidden; position: relative; background: #ddd; }
.image-frame img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 12%; filter: saturate(.82) contrast(1.04); }
.focus-point { position: absolute; left: 61%; top: 42%; width: 26px; height: 26px; border: 3px solid var(--lime); border-radius: 50%; box-shadow: 0 0 0 8px rgba(217,255,67,.25); animation: pulse 2.2s ease-out infinite; }
.focus-point::after { content: ""; position: absolute; width: 6px; height: 6px; inset: 50% auto auto 50%; transform: translate(-50%,-50%); background: var(--lime); border-radius: 50%; }
@keyframes pulse { 50% { box-shadow: 0 0 0 15px rgba(217,255,67,.06); } }
.card-caption { color: var(--white); display: flex; justify-content: space-between; padding: .75rem .25rem .2rem; font-size: .65rem; letter-spacing: .08em; text-transform: uppercase; }
.hero-stamp { position: absolute; right: -1.4rem; bottom: -2rem; width: 145px; height: 145px; background: var(--lime); border-radius: 50%; display: grid; place-content: center; text-align: center; transform: rotate(-7deg); }
.hero-stamp strong { font-size: 2.5rem; line-height: 1; }
.hero-stamp span { margin-top: .35rem; font-size: .62rem; line-height: 1.2; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.hero-index { position: absolute; bottom: 1.5rem; left: var(--pad); font: 700 .68rem/1 monospace; color: var(--muted); }

.signal-strip { min-height: 72px; background: var(--lime); display: flex; justify-content: center; align-items: center; gap: clamp(1rem, 4vw, 4rem); padding: 1rem var(--pad); text-transform: uppercase; font-weight: 900; letter-spacing: .05em; text-align: center; }
.signal-strip p { margin: 0; }
.signal-strip span { width: 7px; height: 7px; background: var(--ink); border-radius: 50%; }
.section { max-width: var(--max); margin: 0 auto; padding: clamp(5.5rem, 10vw, 10rem) var(--pad); }
.section-label, .section-kicker { margin: 0; font-size: .68rem; font-weight: 800; text-transform: uppercase; letter-spacing: .14em; }
.intro { display: grid; grid-template-columns: .55fr 1.5fr .75fr; gap: clamp(2rem, 6vw, 7rem); align-items: start; }
.intro h2 { margin: 0; font-size: clamp(2.7rem, 5vw, 5.4rem); line-height: .96; letter-spacing: -.055em; }
.intro-copy > p { max-width: 730px; margin: 2rem 0 0; color: var(--muted); font-size: 1.1rem; }
.mini-facts { border-top: 1px solid var(--ink); }
.mini-facts > div { padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
.mini-facts span, .mini-facts strong { display: block; }
.mini-facts span { color: var(--muted); font-size: .66rem; text-transform: uppercase; letter-spacing: .08em; }
.mini-facts strong { margin-top: .2rem; font-size: .9rem; }
.results, .robustness, .method { border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: .75fr 2fr; gap: 3rem; align-items: end; margin-bottom: clamp(3rem, 7vw, 7rem); }
.section-number { display: inline-grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--ink); border-radius: 50%; margin-bottom: 1.25rem; font: 700 .75rem/1 monospace; }
.section-heading h2 { margin: 0; font-size: clamp(3.3rem, 7vw, 7rem); line-height: .88; letter-spacing: -.07em; text-transform: uppercase; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.metric-card { min-height: 300px; padding: clamp(1.2rem, 2.5vw, 2.2rem); display: flex; flex-direction: column; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.metric-card-featured { background: var(--blue); color: var(--white); }
.metric-name { font-size: .72rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.metric-card > strong { margin: auto 0 1.6rem; font-size: clamp(2.8rem, 4.8vw, 5rem); line-height: 1; letter-spacing: -.06em; }
.metric-bar { width: 100%; height: 6px; background: rgba(20,20,18,.18); }
.metric-card-featured .metric-bar { background: rgba(255,255,255,.25); }
.metric-bar i { display: block; width: var(--value); height: 100%; background: var(--ink); transform-origin: left; }
.metric-card-featured .metric-bar i { background: var(--lime); }
.metric-card small { margin-top: .65rem; color: var(--muted); font-size: .67rem; }
.metric-card-featured small { color: rgba(255,255,255,.75); }
.finding { max-width: 920px; margin: clamp(3rem, 6vw, 6rem) 0 0 auto; display: grid; grid-template-columns: auto 1fr; gap: 1.5rem; font-size: clamp(1.25rem, 2.1vw, 2rem); line-height: 1.4; }
.finding p { margin: 0; }
.finding-mark { color: var(--blue); font-size: 2.5rem; }

.comparison, .reliability { max-width: none; background: var(--ink); color: var(--white); padding-left: max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad))); padding-right: max(var(--pad), calc((100vw - var(--max)) / 2 + var(--pad))); }
.section-heading-light .section-number { border-color: rgba(255,255,255,.7); }
.section-heading-light .section-kicker { color: #b4b3ad; }
.tradeoff-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(3rem, 8vw, 9rem); align-items: start; }
.tradeoff-copy { max-width: 460px; }
.tradeoff-lead { margin: 0 0 1.2rem; font-size: 1.5rem; font-weight: 800; }
.tradeoff-copy > p:not(.tradeoff-lead) { color: #b4b3ad; }
.speed-callout { margin-top: 3rem; display: flex; gap: 1.25rem; align-items: center; padding-top: 2rem; border-top: 1px solid #484842; }
.speed-callout strong { color: var(--lime); font-size: clamp(4rem, 8vw, 7rem); line-height: .8; letter-spacing: -.07em; }
.speed-callout span { font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .07em; }
.scoreboard { border-top: 1px solid #6f6f67; }
.scoreboard > div { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 1rem; align-items: center; padding: 1.3rem 0; border-bottom: 1px solid #484842; }
.scoreboard-head { color: #8e8e86; font-size: .67rem; text-transform: uppercase; letter-spacing: .1em; }
.scoreboard strong { font-size: clamp(1.2rem, 2vw, 1.8rem); }
.scoreboard .winner { color: var(--lime); }
.chart-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: clamp(4rem, 8vw, 8rem); background: #484842; border: 1px solid #484842; }
.chart-card { margin: 0; background: #20201d; padding: clamp(1rem, 2vw, 2rem); }
.chart-card img { width: 100%; background: white; }
.chart-card figcaption { display: flex; justify-content: space-between; padding-top: 1rem; font-size: .76rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; }
.chart-card figcaption span { color: #9c9c94; }

.robustness-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 4rem); }
.data-figure { margin: 0; }
.data-figure img { width: 100%; border: 1px solid var(--line); background: white; }
.data-figure figcaption { max-width: 570px; margin-top: 1.2rem; color: var(--muted); }
.data-figure figcaption strong { color: var(--ink); }
.reliability-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(3rem, 8vw, 9rem); align-items: center; }
.calibration-figure { margin: 0; background: #fff; padding: .6rem; }
.calibration-figure img { width: 100%; }
.correlation { border-bottom: 1px solid #484842; padding-bottom: 2rem; margin-bottom: 2rem; }
.correlation strong, .correlation span { display: block; }
.correlation strong { color: var(--lime); font-size: clamp(3.8rem, 7vw, 7rem); line-height: 1; letter-spacing: -.07em; }
.correlation span { color: #9c9c94; text-transform: uppercase; letter-spacing: .08em; font-size: .68rem; margin-top: .5rem; }
.reliability-copy > p { font-size: 1.2rem; color: #c5c4bd; }
.failure-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 2.5rem 0 1.5rem; }
.failure-stats > div { border-left: 3px solid var(--blue); padding-left: 1rem; }
.failure-stats strong, .failure-stats span { display: block; }
.failure-stats strong { font-size: 2.7rem; line-height: 1; }
.failure-stats span { margin-top: .5rem; color: #aaa9a2; font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; }
.reliability-copy small { color: #77776f; }

.method-list { list-style: none; margin: 0 0 clamp(5rem, 9vw, 9rem); padding: 0; border-top: 1px solid var(--ink); }
.method-list li { display: grid; grid-template-columns: .5fr 1.5fr; border-bottom: 1px solid var(--line); padding: 1.6rem 0; align-items: baseline; }
.method-list li > span { font: 700 .72rem/1 monospace; color: var(--blue); }
.method-list li > div { display: grid; grid-template-columns: .55fr 1.45fr; gap: 2rem; align-items: baseline; }
.method-list strong { font-size: clamp(1.5rem, 2.5vw, 2.3rem); }
.method-list p { margin: 0; max-width: 650px; color: var(--muted); }
.downloads { padding: clamp(2rem, 5vw, 4.5rem); background: var(--blue); color: var(--white); display: grid; grid-template-columns: .85fr 1.15fr; gap: 3rem; }
.downloads h3 { margin: 1rem 0 0; font-size: clamp(2.5rem, 5vw, 5rem); line-height: .95; letter-spacing: -.06em; }
.download-links { border-top: 1px solid rgba(255,255,255,.65); }
.download-links a { display: flex; justify-content: space-between; gap: 1rem; padding: 1.1rem 0; border-bottom: 1px solid rgba(255,255,255,.3); text-decoration: none; font-weight: 800; }
.download-links a:hover { color: var(--lime); }
.download-links span { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; }
.site-footer { background: var(--lime); padding: clamp(4rem, 8vw, 7rem) var(--pad) 2rem; }
.footer-title { font-size: clamp(4rem, 14vw, 13rem); font-weight: 900; line-height: .8; letter-spacing: -.08em; }
.site-footer > p { margin: 3rem 0; font-weight: 700; }
.site-footer > div:last-child { display: flex; justify-content: space-between; gap: 2rem; padding-top: 1rem; border-top: 1px solid rgba(20,20,18,.4); font-size: .68rem; text-transform: uppercase; letter-spacing: .06em; }

.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s cubic-bezier(.2,.7,.2,1); }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero h1 { font-size: clamp(4.5rem, 14vw, 7.5rem); }
  .hero-visual { justify-self: center; width: min(82%, 580px); }
  .intro { grid-template-columns: 1fr 2fr; }
  .mini-facts { grid-column: 2; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .tradeoff-grid, .reliability-grid, .downloads { grid-template-columns: 1fr; }
  .tradeoff-copy { max-width: 700px; }
}

@media (max-width: 700px) {
  .site-header { height: 64px; }
  .menu-button { display: block; position: relative; z-index: 2; }
  .menu-button[aria-expanded="true"] > span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] > span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { position: absolute; top: 64px; right: 0; bottom: auto; left: 0; min-height: calc(100vh - 64px); background: var(--lime); flex-direction: column; justify-content: center; gap: 2rem; transform: translateY(-110%); transition: transform .3s ease; }
  .site-nav.is-open { transform: translateY(0); }
  .site-nav a { font-size: 1.6rem; }
  .hero { padding-top: 8rem; }
  .eyebrow { flex-wrap: wrap; gap: .6rem; }
  .hero h1 { font-size: clamp(3rem, 13.2vw, 5rem); }
  .hero-deck { margin-top: 2rem; }
  .hero-visual { width: 88%; margin-top: 1.5rem; }
  .hero-stamp { width: 112px; height: 112px; right: -1rem; }
  .hero-stamp strong { font-size: 2rem; }
  .signal-strip { justify-content: flex-start; overflow: hidden; white-space: nowrap; font-size: .72rem; }
  .intro, .section-heading { grid-template-columns: 1fr; gap: 2rem; }
  .section > *, .section-heading > *, .downloads > * { min-width: 0; }
  .section-heading h2 { font-size: clamp(2.6rem, 11.5vw, 4.25rem); }
  .mini-facts { grid-column: auto; }
  .section-heading { align-items: start; }
  .metric-grid, .chart-pair, .robustness-grid { grid-template-columns: 1fr; }
  .metric-card { min-height: 240px; }
  .scoreboard > div { grid-template-columns: 1.2fr .8fr .8fr; }
  .method-list li { grid-template-columns: 44px 1fr; }
  .method-list li > div { grid-template-columns: 1fr; gap: .35rem; }
  .failure-stats { gap: .5rem; }
  .site-footer > div:last-child { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}