:root {
  --blue: #0F21A2;
  --blue-ink: #0A1675;
  --blue-soft: #E4E7FA;
  --bg: #E7E8EB;
  --panel: #F2F3F5;
  --white: #FFFFFF;
  --ink: #0B0C10;
  --ink-2: #4A4D57;
  --ink-3: #7C7F89;
  --line: rgba(11, 12, 16, 0.12);
  --radius: 14px;
  --radius-lg: 20px;
  --gutter: clamp(16px, 4vw, 48px);
  --max: 1280px;
  --font: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --wide: "Archivo", "Inter Tight", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.03em; line-height: 1.02; text-wrap: balance; }
p { margin: 0; }
code, pre, .mono { font-family: var(--mono); }
.muted { color: var(--ink-2); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 48px; padding: 0 22px;
  border-radius: 999px; border: 1px solid transparent;
  font: 500 15px/1 var(--font); text-decoration: none; cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn:active { transform: translateY(1px); }
.btn-sm { height: 38px; padding: 0 16px; font-size: 14px; }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-ink); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: var(--blue); }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: #fff; }
.btn-white { background: #fff; color: var(--blue); }
.btn-white:hover { background: var(--blue-soft); }
.btn-outline-white { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-outline-white:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn:focus-visible, .seg button:focus-visible, a:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

.link { font-weight: 500; text-decoration: none; color: var(--blue); }
.link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- announce + nav ---------- */
.announce {
  display: flex; justify-content: center; gap: 10px;
  padding: 9px var(--gutter);
  background: var(--ink); color: #fff;
  font: 500 12px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase;
  text-decoration: none; text-align: center;
}
.announce:hover span:last-child { transform: translateX(3px); }
.announce span:last-child { transition: transform .2s; }

.nav {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 12px var(--gutter);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.nav.scrolled { border-bottom-color: var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.mark { width: 30px; height: 30px; flex: none; }
.wordmark { font: 800 19px/1 var(--wide); font-stretch: 125%; letter-spacing: -0.02em; }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font: 500 12px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase;
  text-decoration: none; color: var(--ink-2);
}
.nav-links a:hover { color: var(--ink); }

/* ---------- eyebrow / sections ---------- */
.eyebrow {
  font: 500 12px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 20px;
}
.section { max-width: var(--max); margin: 0 auto; padding: clamp(72px, 10vw, 128px) var(--gutter); }
.section-white { max-width: none; background: var(--white); }
.section-white > * { max-width: calc(var(--max) - 2 * var(--gutter)); margin-left: auto; margin-right: auto; }
.section-head { margin-bottom: clamp(40px, 6vw, 64px); }
.section-head.center { text-align: center; }
.section-head.row { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; flex-wrap: wrap; }
.narrow { max-width: 380px; }
h2 { font-size: clamp(36px, 5.2vw, 64px); }
h3 { font-size: clamp(20px, 2vw, 24px); letter-spacing: -0.02em; line-height: 1.15; }

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden;
  min-height: min(88vh, 860px);
  display: flex; flex-direction: column; justify-content: center;
  padding: 96px var(--gutter) 40px;
}
.hero-grid { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-inner { position: relative; max-width: 860px; margin: 0 auto; text-align: center; }
.hero .eyebrow { color: var(--blue); }
h1 { font-size: clamp(52px, 9vw, 120px); letter-spacing: -0.045em; line-height: .95; }
.lede { max-width: 600px; margin: 28px auto 0; font-size: clamp(16px, 1.6vw, 19px); color: var(--ink-2); }
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 36px; }
.hero-stats {
  position: relative; display: grid; grid-template-columns: repeat(3, 1fr);
  max-width: 860px; width: 100%; margin: 80px auto 0;
  border-top: 1px solid var(--line);
}
.hero-stats div { padding: 18px 0 0; }
.hero-stats div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.hero-stats dt { font: 500 11px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.hero-stats dd { margin: 8px 0 0; font-size: clamp(22px, 3vw, 34px); font-weight: 600; letter-spacing: -0.03em; }

/* ---------- method feature ---------- */
.feature-card {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(24px, 4vw, 56px); align-items: center;
  padding: clamp(16px, 2.4vw, 28px);
  background: var(--panel); border-radius: var(--radius-lg);
}
.feature-visual {
  aspect-ratio: 4 / 3; border-radius: var(--radius);
  background: var(--blue); color: #fff;
  display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 28px;
  padding: 24px; position: relative; overflow: hidden;
}
.eq { display: flex; align-items: center; gap: clamp(6px, 1.2vw, 14px); }
.mat {
  position: relative; display: flex; align-items: flex-end; justify-content: center;
  border: 1.5px solid rgba(255,255,255,.85); border-radius: 4px;
  font: 500 clamp(9px, 1vw, 12px)/1 var(--mono); padding-bottom: 6px;
  background-size: 8px 8px;
}
.mat span { background: var(--blue); padding: 2px 4px; position: relative; }
.mat-w { width: clamp(84px, 11vw, 140px); aspect-ratio: 1; background-image: radial-gradient(rgba(255,255,255,.55) 1.2px, transparent 1.4px); }
.mat-u { width: clamp(26px, 3vw, 38px); height: clamp(84px, 11vw, 140px); }
.mat-s { width: clamp(26px, 3vw, 38px); aspect-ratio: 1; align-self: center; }
.mat-v { width: clamp(84px, 11vw, 140px); height: clamp(26px, 3vw, 38px); align-self: flex-start; margin-top: clamp(0px, 1vw, 8px); }
.mat-u, .mat-v { background-image: linear-gradient(90deg, rgba(255,255,255,.9) 50%, transparent 50%), linear-gradient(rgba(255,255,255,.9) 50%, transparent 50%); background-size: 7px 7px; background-blend-mode: difference; }
.mat-s { background: rgba(255,255,255,.18); }
.op { font-size: clamp(22px, 3vw, 34px); }
.eq-note { font: 400 12px/1.5 var(--mono); opacity: .8; text-align: center; max-width: 360px; }
.feature-copy { display: flex; flex-direction: column; gap: 18px; padding-right: clamp(0px, 2vw, 24px); }
.feature-copy h3 { font-size: clamp(28px, 3.4vw, 42px); letter-spacing: -0.03em; }
.feature-copy p { color: var(--ink-2); }
.tag {
  align-self: flex-start; padding: 6px 10px; border-radius: 6px;
  background: var(--ink); color: #fff;
  font: 500 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase;
}

/* ---------- pipeline split ---------- */
.split { display: grid; grid-template-columns: 1fr 1.25fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
.split-head { position: sticky; top: 110px; }
.split-head p.muted { margin-top: 24px; max-width: 340px; }
.split-head code { font-size: .9em; background: var(--panel); padding: 2px 6px; border-radius: 4px; }
.steps { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.steps li {
  display: grid; grid-template-columns: 56px 1fr; gap: 16px;
  padding: 28px 0; border-bottom: 1px solid var(--line);
}
.step-n { font: 500 13px/1.6 var(--mono); color: var(--blue); }
.steps h3 { margin-bottom: 10px; }
.steps p { color: var(--ink-2); max-width: 520px; }
.steps code {
  display: inline-block; margin-top: 14px; padding: 6px 10px;
  background: var(--white); border: 1px solid var(--line); border-radius: 6px;
  font-size: 12px; color: var(--ink); overflow-wrap: anywhere;
}

/* ---------- models ---------- */
.model-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.model {
  display: flex; flex-direction: column; gap: 14px;
  padding: 24px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid transparent;
  transition: border-color .2s, transform .2s;
}
.model:hover { border-color: var(--line); transform: translateY(-2px); }
.model-main { background: var(--blue); color: #fff; }
.model.model-main p, .model.model-main dt, .model.model-main .mono { color: rgba(255,255,255,.78); }
.model-top { display: flex; justify-content: space-between; align-items: center; font-size: 12px; }
.model-top .mono { color: var(--ink-3); }
.model h3 { font-family: var(--mono); font-weight: 500; font-size: 17px; letter-spacing: -0.01em; overflow-wrap: anywhere; }
.model p { color: var(--ink-2); font-size: 15px; flex: 1; }
.model dl { display: flex; gap: 24px; margin: 0; padding-top: 14px; border-top: 1px solid var(--line); }
.model-main dl { border-top-color: rgba(255,255,255,.2); }
.model dt { font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); }
.model dd { margin: 6px 0 0; font-weight: 500; }
.status {
  display: inline-flex; align-items: center; gap: 6px;
  font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em;
}
.status::before { content: ""; width: 7px; height: 7px; background: currentColor; }
.status-done { color: var(--ink-2); }
.status-live { color: var(--blue); }
.status-live::before { animation: blink 1.2s steps(2) infinite; }
.status-next { color: #fff; }
@keyframes blink { 50% { opacity: 0; } }

.results { margin-top: 56px; }
.results-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.results-head .mono { font-size: 12px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; min-width: 520px; }
th, td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--line); font-size: 15px; }
th { font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); background: var(--panel); }
th:not(:first-child), td:not(:first-child) { text-align: right; }
tr:last-child td { border-bottom: 0; }
td.pending { font: 400 12px/1 var(--mono); color: var(--ink-3); }

/* ---------- calculator ---------- */
.calc {
  display: grid; grid-template-columns: 1fr 1.3fr; gap: clamp(24px, 4vw, 48px);
  padding: clamp(20px, 3vw, 40px); background: var(--panel); border-radius: var(--radius-lg);
}
fieldset { border: 0; margin: 0 0 28px; padding: 0; }
legend { font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); margin-bottom: 12px; padding: 0; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg button {
  height: 40px; padding: 0 16px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--white); color: var(--ink);
  font: 500 14px/1 var(--font); cursor: pointer; transition: all .15s;
}
.seg button:hover { border-color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.fine { font-size: 13px; color: var(--ink-3); max-width: 360px; }
.calc-out { display: flex; flex-direction: column; justify-content: center; gap: 18px; }
.bar-row { display: grid; grid-template-columns: 80px 1fr 84px; align-items: center; gap: 14px; }
.bar-label { font: 500 12px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-2); }
.bar { height: 28px; background: var(--white); border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; transition: width .6s cubic-bezier(.2,.8,.2,1); }
.bar-fp { background: var(--ink); }
.bar-lb { background: var(--blue); min-width: 3px; }
.bar-val { font: 500 14px/1 var(--mono); text-align: right; }
.calc-big { margin-top: 12px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.calc-big #ratio { font-size: clamp(56px, 8vw, 104px); font-weight: 600; letter-spacing: -0.05em; line-height: .9; color: var(--blue); }

/* ---------- get started ---------- */
.start-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.start-card {
  display: flex; flex-direction: column; gap: 14px;
  padding: 28px; border-radius: var(--radius); background: var(--panel);
}
.start-icon {
  width: 44px; height: 44px; display: grid; place-items: center;
  background: var(--blue); color: #fff; border-radius: 10px; font-size: 20px;
}
.start-card p { color: var(--ink-2); flex: 1; }
.start-card pre {
  margin: 0; padding: 14px; border-radius: 8px; background: var(--ink); color: #DDE1FF;
  font-size: 12px; line-height: 1.6; overflow-x: auto; white-space: pre;
}

/* ---------- lineage ---------- */
.papers { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.papers li { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); display: flex; flex-direction: column; gap: 12px; }
.papers .mono { font-size: 12px; color: var(--blue); letter-spacing: .06em; text-transform: uppercase; }
.papers p { color: var(--ink-2); flex: 1; }
.disclaimer { margin-top: 24px; font: 400 13px/1.5 var(--mono); color: var(--ink-3); }

/* ---------- closing ---------- */
.closing { position: relative; overflow: hidden; background: var(--blue); color: #fff; }
.closing-grid { position: absolute; inset: 0; width: 100%; height: 100%; }
.closing-inner {
  position: relative; max-width: var(--max); margin: 0 auto;
  padding: clamp(96px, 14vw, 180px) var(--gutter);
}
.closing h2 { font-size: clamp(44px, 7.5vw, 104px); letter-spacing: -0.045em; max-width: 12ch; }
.closing .cta-row { justify-content: flex-start; margin-top: 40px; }

/* ---------- footer ---------- */
.footer { background: var(--ink); color: #fff; padding: 48px var(--gutter) 32px; }
.footer-top, .footer-bottom { max-width: var(--max); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.footer nav { display: flex; gap: 24px; flex-wrap: wrap; }
.footer nav a { text-decoration: none; color: rgba(255,255,255,.7); font-size: 14px; }
.footer nav a:hover { color: #fff; }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.14); font-size: 13px; color: rgba(255,255,255,.55); }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px);
  padding: 12px 18px; border-radius: 999px; background: var(--ink); color: #fff;
  font: 500 13px/1 var(--mono); opacity: 0; pointer-events: none; transition: all .25s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .nav-links { display: none; }
  .feature-card, .split, .calc { grid-template-columns: 1fr; }
  .split-head { position: static; }
  .model-grid, .start-grid { grid-template-columns: minmax(0, 1fr); }
  .papers { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .hero { padding-top: 64px; }
  .hero-stats { grid-template-columns: 1fr; margin-top: 56px; }
  .hero-stats div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); margin-top: 14px; }
  .steps li { grid-template-columns: 1fr; gap: 6px; }
  .bar-row { grid-template-columns: 64px 1fr 70px; gap: 10px; }
  .announce { font-size: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .status-live::before { animation: none; }
}

/* ---------- X + placeholder links ---------- */
.x-icon { width: 15px; height: 15px; margin-right: 8px; flex: none; }
.soon { color: var(--ink-3); cursor: default; }
.link.soon { text-decoration: none; }
.footer .soon { color: rgba(255,255,255,.35); font-size: 14px; }
.btn span { white-space: nowrap; }
@media (max-width: 560px) {
  .nav-x { width: 38px; padding: 0; }
  .nav-x span { display: none; }
  .nav-x .x-icon { margin-right: 0; }
}