:root {
  --ink: #1a1916; --muted: #6e695f; --ink-2: #4a463f; --paper: #f5f1e8; --rule: #d8d1c2; --hair: #e9e3d6; --cobalt: #1f44b8;
  --g: 56px; --mast: 52px; --sans: "Inter Tight", system-ui, sans-serif; --mono: "IBM Plex Mono", monospace;
}
* { box-sizing: border-box; }
/* in-page links land the section's top rule exactly on the masthead's bottom rule */
html { scroll-padding-top: calc(var(--mast) - 1px); }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
html { background: var(--paper); color: var(--ink); font: 400 17px/1.55 var(--sans); -webkit-font-smoothing: antialiased; }
body { margin: 0; }
a { color: inherit; }
.wrap { padding: 0 var(--g); }

/* arrows: drawn with mitred corners, coloured by currentColor */
.arr { display: inline-block; width: .95em; height: .7em; vertical-align: -.02em; background: currentColor;
  -webkit-mask: var(--a) no-repeat center / contain; mask: var(--a) no-repeat center / contain;
  --a: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 16'%3E%3Cpath d='M0 8H21M14 1l7 7-7 7' fill='none' stroke='%23000' stroke-width='2' stroke-linejoin='miter' stroke-miterlimit='10'/%3E%3C/svg%3E"); }
.arr.ne { width: .7em; height: .7em;
  --a: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M2 14L13 3M4 3h9v9' fill='none' stroke='%23000' stroke-width='2' stroke-linejoin='miter' stroke-miterlimit='10'/%3E%3C/svg%3E"); }
.arr.bold { width: .78em; height: .62em; margin: 0 .04em; vertical-align: .05em;
  --a: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 18'%3E%3Cpath d='M0 9H19M11.5 2l8 7-8 7' fill='none' stroke='%23000' stroke-width='4' stroke-linejoin='miter' stroke-miterlimit='10'/%3E%3C/svg%3E"); }

.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* masthead */
.mast { display: grid; grid-template-columns: repeat(6, 1fr); align-items: center; height: var(--mast); padding: 0 var(--g); border-bottom: 1px solid var(--ink);
        font: 500 11px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; position: sticky; top: 0; background: rgba(245,241,232,.94); backdrop-filter: blur(6px); z-index: 5; }
.mast span:nth-child(2) { grid-column: 2 / 4; }
.mast nav { grid-column: 4 / 7; display: flex; justify-content: flex-end; gap: 22px; }
.mast nav a { text-decoration: none; }
.mast nav a:hover { color: var(--cobalt); }
.mast b { font-weight: 500; color: var(--muted); margin-right: 8px; }

/* hero */
.hero h1 { margin: 76px 0 0; font: 800 clamp(64px, 13.4vw, 196px)/.84 var(--sans); letter-spacing: -.04em; text-transform: uppercase; }
.hero .row { display: grid; grid-template-columns: repeat(6, 1fr); padding: 40px 0 64px; }
.hero .lede { grid-column: 3 / 6; margin: 0; font: 500 clamp(22px, 2.1vw, 29px)/1.3 var(--sans); letter-spacing: -.015em; }
.hero .cta { grid-column: 3 / 6; display: flex; flex-wrap: wrap; gap: 14px 26px; align-items: center; margin-top: 30px; }
.btn { display: inline-block; background: var(--cobalt); color: #fff; text-decoration: none; font: 600 15px/1 var(--sans); padding: 18px 24px; }
.btn { transition: background-color .2s ease, transform .2s ease; }
.btn:hover { background: #17369a; }
.btn:active { transform: translateY(1px); }
.arr { transition: transform .22s cubic-bezier(.2,.8,.2,1); }
a:hover > .arr:not(.ne) { transform: translateX(3px); }
a:hover > .arr.ne { transform: translate(2px, -2px); }
.quiet { background: linear-gradient(currentColor, currentColor) no-repeat 0 100% / 0 1px; transition: background-size .25s ease, color .2s ease, border-color .2s ease; }
.quiet:hover { background-size: 100% 1px; color: var(--cobalt); border-color: transparent; }
/* "View on GitHub": underlined at rest, a cobalt chip on hover; padding is offset so the text stays on the column edge */
.proj a { margin-left: -8px; padding: 7px 8px 8px;
  background: linear-gradient(var(--ink), var(--ink)) no-repeat 8px calc(100% - 4px) / calc(100% - 16px) 1px;
  transition: background-color .2s ease, color .2s ease; }
.proj a:hover { background: var(--cobalt); color: #fff; }
.mast nav a, .contact .lines a { transition: color .2s ease; }
a:focus-visible, .btn:focus-visible { outline: 2px solid var(--cobalt); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; } }
.quiet { font: 500 14px/1 var(--sans); text-decoration: none; border-bottom: 1px solid var(--ink); padding-bottom: 4px; }
.avail { font: 500 13px/1.5 var(--mono); color: var(--ink-2); }
.avail i { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #2b8a57; margin-right: 7px; vertical-align: 1px; }

/* sections */
section { display: grid; grid-template-columns: repeat(6, 1fr); border-top: 1px solid var(--ink); padding: 26px 0 64px; }
section > h2 { grid-column: 1 / 3; margin: 0; font: 500 11px/1.6 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
section > h2 b { font-weight: 500; color: var(--muted); margin-right: 10px; }
section > .body { grid-column: 3 / 7; }
.intro { font: 500 22px/1.35 var(--sans); letter-spacing: -.012em; margin: -4px 0 34px; }

/* figures */
.figs { display: grid; grid-template-columns: repeat(4, 1fr); }
.fig { padding: 0 24px 4px 0; }
.fig b { display: block; font: 800 clamp(34px, 3.6vw, 52px)/1 var(--sans); letter-spacing: -.04em; }
.fig span { display: block; margin-top: 10px; font-size: 14px; line-height: 1.45; color: #3c3a35; }
.fig .arr { display: inline-block; margin-top: 0; font-size: inherit; line-height: inherit; }
.fig small { display: block; margin-top: 8px; font: 400 11px/1.4 var(--mono); color: var(--muted); }

/* services */
.services { display: grid; grid-template-columns: 1fr 1fr; }
.svc { padding-right: 32px; }
.svc { border-top: 1px solid var(--rule); padding: 18px 0 22px; }
.svc h3 { margin: 0 0 6px; font: 600 19px/1.25 var(--sans); letter-spacing: -.01em; }
.svc h3 span { font: 400 12px var(--mono); color: var(--cobalt); margin-right: 10px; letter-spacing: 0; }
.svc p { margin: 0; color: #3c3a35; font-size: 16px; }

/* process */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); counter-reset: s; }
.step { padding: 0 24px 0 0; }
.step::before { counter-increment: s; content: "0" counter(s); display: block; font: 500 12px var(--mono); color: var(--cobalt); margin-bottom: 10px; }
.step h3 { margin: 0 0 6px; font: 600 18px/1.25 var(--sans); letter-spacing: -.01em; }
.step p { margin: 0; font-size: 15px; line-height: 1.5; color: #3c3a35; }
.note { margin: 28px 0 0; font: 500 17px/1.45 var(--sans); letter-spacing: -.005em; }

/* experience */
.role { display: grid; grid-template-columns: 1fr 3fr; gap: 0; border-top: 1px solid var(--rule); padding: 20px 0 26px; }
.role:first-child { border-top: 0; padding-top: 0; }
.role .when { font: 400 12px/1.7 var(--mono); color: var(--muted); padding-right: 20px; }
.role .when b { display: block; font: 600 19px/1.25 var(--sans); color: var(--ink); letter-spacing: -.01em; margin-bottom: 4px; }
.role .tag { display: block; margin-top: 2px; }
.role ul { margin: 0; padding: 0; list-style: none; }
.role li { padding: 0 0 10px 28px; position: relative; font-size: 16px; }
.role li::before { content: ""; position: absolute; left: 10px; top: .72em; width: 8px; height: 1px; background: var(--ink); }
.role li strong { font-weight: 600; }

/* open source */
#open-source > h2 { grid-column: 1 / 7; margin-bottom: 28px; }
#open-source > .body { grid-column: 1 / 7; }
.oss { display: grid; grid-template-columns: repeat(3, 1fr); }
.proj { padding: 0 32px 0 0; display: flex; flex-direction: column; }
.proj .lang { font: 400 11px/1.4 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.proj h3 { margin: 8px 0 8px; font: 800 26px/1.05 var(--sans); letter-spacing: -.03em; }
.proj p { margin: 0 0 14px; font-size: 15px; line-height: 1.5; color: #3c3a35; flex: 1; }
.proj .stat { font: 500 12px/1.4 var(--mono); color: var(--cobalt); margin-bottom: 12px; }
.proj a { font: 500 13px/1 var(--sans); text-decoration: none; align-self: flex-start; }

/* skills */
.skills { display: grid; grid-template-columns: 1fr 1fr; }
.skill { padding-right: 32px; }
.skill { border-top: 1px solid var(--rule); padding: 14px 0 16px; display: grid; grid-template-columns: 130px 1fr; gap: 12px; }
.skill:nth-child(-n+2) { border-top: 0; padding-top: 0; }
.skill b { font: 500 11px/1.8 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.skill span { font-size: 16px; }

/* education */
.edu { display: grid; grid-template-columns: 1fr 3fr; }
.edu b { font: 600 19px/1.25 var(--sans); }
.edu .when { font: 400 12px/1.7 var(--mono); color: var(--muted); }

/* contact */
.contact h3 { margin: 0 0 22px; font: 800 clamp(40px, 5.6vw, 84px)/.92 var(--sans); letter-spacing: -.035em; text-transform: uppercase; }
.contact .lines { display: grid; grid-template-columns: repeat(2, 1fr); margin-top: 30px; }
.contact .lines div:nth-child(odd) { margin-right: 32px; }
.contact .lines div { border-top: 1px solid var(--rule); padding: 14px 0; display: flex; justify-content: space-between; gap: 12px; font-size: 16px; }
.contact .lines b { font: 500 11px/1.9 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.contact .lines a { text-decoration: none; }
.contact .lines a:hover { color: var(--cobalt); }
footer { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 22px var(--g) 46px; border-top: 1px solid var(--ink); font: 500 12.5px/1.6 var(--mono); color: var(--ink-2); letter-spacing: .02em; }

/* laptops and tablets: same grid, fewer things side by side */
@media (max-width: 1100px) {
  .mast span:nth-child(2) { display: none; }
  .figs { grid-template-columns: 1fr 1fr; row-gap: 30px; }
  .steps { grid-template-columns: 1fr; }
  .step { display: grid; grid-template-columns: 44px 1fr 1.6fr; gap: 0 16px; align-items: baseline; border-top: 1px solid var(--rule); padding: 14px 0; }
  .step::before { margin: 0; }
  .step:first-child { border-top: 0; padding-top: 0; }
  .step h3 { margin: 0; }
  .oss { grid-template-columns: 1fr; row-gap: 36px; }
  .proj { display: grid; grid-template-columns: 1fr 2fr; gap: 0 24px; padding-right: 0; }
  .proj .lang, .proj h3 { grid-column: 1; }
  .proj p, .proj .stat, .proj a { grid-column: 2; }
  .proj .lang { grid-row: 1; } .proj h3 { grid-row: 2; }
  .proj p { grid-row: 1 / 3; margin-top: 2px; }
  .proj h3 { font-size: 21px; }
  .skills, .contact .lines { grid-template-columns: 1fr; }
  .skill { grid-template-columns: 1fr 3fr; padding-right: 0; }
  .skill:nth-child(2) { border-top: 1px solid var(--rule); padding-top: 14px; }
  .contact .lines div, .contact .lines div:nth-child(odd) { margin-right: 0; }
}
@media (max-width: 700px) {
  :root { --g: 20px; }
  .mast { grid-template-columns: 1fr auto; }
  .mast span:nth-child(2) { display: none; }
  .mast nav { grid-column: 2; gap: 14px; }
  .mast nav a:not(.keep) { display: none; }
  .hero h1 { margin-top: 44px; font-size: 19vw; }
  .hero .row { grid-template-columns: 1fr; padding: 26px 0 48px; }
  .hero .lede, .hero .cta { grid-column: 1; }
  section { grid-template-columns: 1fr; padding: 18px 0 46px; }
  section > h2 { grid-column: 1; margin-bottom: 22px; }
  section > .body, #open-source > h2, #open-source > .body { grid-column: 1; }
  .oss { grid-template-columns: 1fr; gap: 32px; }
  .svc, .skill, .proj { padding-right: 0; }
  .contact .lines div { margin-right: 0; }
  .intro { font-size: 20px; }
  .services, .skills, .contact .lines { grid-template-columns: 1fr; }
  .step { grid-template-columns: 34px 1fr; }
  .step p { grid-column: 2; margin-top: 4px; }
  .proj { display: flex; }
  .role, .edu { grid-template-columns: 1fr; gap: 8px; }
  .skill { grid-template-columns: 1fr; gap: 2px; }
  .figs { row-gap: 26px; }
  .fig { margin-right: 14px; padding-right: 14px; }
}

/* ---------- hero with the eroll panel ---------- */
.hero { display: grid; grid-template-columns: repeat(6, 1fr); grid-template-rows: auto 1fr; align-items: start; padding-bottom: 56px; }
.hero h1 { grid-column: 1 / 5; grid-row: 1; }
.hero .row { grid-column: 1 / 5; grid-row: 2; display: block; padding: 34px 32px 0 0; }
.hero .lede { max-width: 30ch; }
.hero .cta { margin-top: 30px; }
.demo { grid-column: 5 / 7; grid-row: 1 / 3; margin: 76px 0 0; align-self: start; min-width: 0; }

.demo-card { background: #fbf9f4; border: 1px solid var(--ink); }
.demo-top { display: flex; justify-content: space-between; align-items: center; padding: 10px 12px; border-bottom: 1px solid var(--ink); font: 500 11px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.demo-top .t-sm { display: none; }
.demo-top .live { display: inline-flex; align-items: center; gap: 7px; color: var(--cobalt); }
.demo-top .live i { width: 7px; height: 7px; border-radius: 50%; background: var(--cobalt); animation: blink 1.4s ease-in-out infinite; }
@keyframes blink { 50% { opacity: .25; } }
.steps-bar { display: grid; grid-template-columns: repeat(5, 1fr); border-bottom: 1px solid var(--rule); }
.steps-bar span { padding: 7px 0 6px; text-align: center; font: 500 9.5px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); border-right: 1px solid var(--rule); transition: background-color .25s, color .25s; }
.steps-bar span:last-child { border-right: 0; }
.steps-bar span.on { background: var(--cobalt); color: #fff; }
.steps-bar span.done { color: var(--ink); }

.stage { position: relative; height: 330px; overflow: hidden; background: #ece7dc; }
.scan { position: absolute; inset: 14px 16px; background: #f7f3ea; transform: rotate(-.4deg); box-shadow: 0 1px 6px rgba(0,0,0,.12);
  padding: 9px 10px; font-family: var(--mono); color: #2b2925; }
.scan::after { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 .2 0 0 0 0 .2 0 0 0 0 .2 0 0 0 .22 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.scan-head { display: flex; justify-content: space-between; font: 600 8px/1.2 var(--mono); letter-spacing: .06em; border-bottom: 1.5px solid #2b2925; padding-bottom: 4px; margin-bottom: 6px; }
.scan-head b { color: #8c8578; border: 1px solid #cfc8ba; padding: 0 3px; font-weight: 500; }
.scan-sec { font: 600 7.6px/1.3 var(--mono); margin: -2px 0 15px; position: relative; }
.scan-sec .f { display: inline-block; filter: blur(1.1px); opacity: .78; transition: filter .35s, opacity .35s; }
.scan-sec.read .f { filter: none; opacity: 1; }
.scan-sec .ring { position: absolute; inset: -1px -4px; border: 1.5px solid var(--cobalt); opacity: 0; transition: opacity .2s; }
.scan-sec.read .ring { opacity: 1; }
.vgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 13px 9px; }
.vbox { position: relative; border: 1px solid #6d675c; padding: 3px 5px 2px; font-size: 7.6px; line-height: 1.4; height: 52px; }
.vbox .f { display: block; white-space: nowrap; overflow: hidden; filter: blur(1.1px); opacity: .78; transition: filter .35s, opacity .35s; }
.vbox .f.k { font-weight: 600; }
.vbox .top { display: flex; justify-content: space-between; }
.vbox.read .f { filter: none; opacity: 1; }
.vbox .ring { position: absolute; inset: -2px; border: 1.5px solid var(--cobalt); opacity: 0; transition: opacity .2s; }
.vbox .ring i { position: absolute; top: -10px; left: -1.5px; background: var(--cobalt); color: #fff; font: 500 7px/1 var(--mono); padding: 1.5px 3px; font-style: normal; }
.vbox.seen .ring { opacity: 1; }
.vbox.hit .ring { border-width: 2.5px; box-shadow: 0 0 0 3px rgba(31,68,184,.18); }
.beam { position: absolute; left: 0; right: 0; height: 46px; top: -46px; background: linear-gradient(transparent, rgba(31,68,184,.22) 70%, rgba(31,68,184,.55)); pointer-events: none; }

.captcha { position: absolute; left: 50%; top: 50%; width: 236px; transform: translate(-50%, -50%); background: #fff; border: 1px solid var(--ink); box-shadow: 0 10px 30px rgba(0,0,0,.18);
  padding: 12px; opacity: 0; transition: opacity .3s; z-index: 3; }
.captcha.on { opacity: 1; }
.captcha .lbl { font: 500 9.5px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 8px; }
.captcha svg { display: block; width: 100%; height: auto; background: #eef0f5; }
.captcha .out { margin-top: 8px; font: 500 12px/1.3 var(--mono); min-height: 1.3em; }
.captcha .out b { color: #1f7a4d; font-weight: 500; }
.match { width: 262px; }
.mrow { display: grid; grid-template-columns: 74px 1fr; align-items: baseline; padding: 3px 0; }
.mk { font: 500 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.mw { font: 600 15px/1.2 var(--mono); letter-spacing: .04em; }
.mw em { font-style: normal; color: #fff; background: var(--cobalt); padding: 0 1px; }
.meter { position: relative; height: 8px; background: #e6e1d6; margin: 10px 0 2px; }
.meter i { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--cobalt); transition: width .7s cubic-bezier(.2,.8,.2,1); }
.meter b { position: absolute; left: 80%; top: -4px; bottom: -4px; width: 2px; background: var(--ink); }
.meter b::after { content: "80% needed"; position: absolute; top: 14px; left: -24px; font: 500 8.5px/1 var(--mono); color: var(--muted); white-space: nowrap; }

.out-panel { border-top: 1px solid var(--ink); font: 400 10.5px/1.55 var(--mono); }
.out-head, .out-row { display: grid; grid-template-columns: 18px minmax(0, 1.5fr) 34px minmax(0, 1.1fr) 32px; gap: 6px; padding: 0 12px; }
.out-row span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.out-row span:last-child { color: #1f7a4d; text-align: right; }
.out-head span:last-child { text-align: right; }
.out-head { padding-top: 7px; padding-bottom: 5px; color: var(--muted); font-size: 9.5px; letter-spacing: .06em; text-transform: uppercase; border-bottom: 1px solid var(--rule); }
.out-rows { height: 84px; overflow: hidden; display: flex; flex-direction: column; justify-content: flex-end; }
.out-row { animation: rowin .3s ease; }
.out-row.hit { background: rgba(31,68,184,.12); }
@keyframes rowin { from { opacity: 0; transform: translateY(6px); } }
.dstatus { display: flex; justify-content: space-between; gap: 10px; padding: 8px 12px; border-top: 1px solid var(--rule); font: 500 10.5px/1.4 var(--mono); min-height: 34px; align-items: center; }
.dstatus .ok { color: #1f7a4d; }
.dstatus .q { color: var(--cobalt); }
.dstatus .q::after { content: "▍"; animation: blink 1s steps(1) infinite; }
.demo-cap { margin: 10px 0 0; font: 400 11.5px/1.5 var(--mono); color: var(--ink-2); display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.demo-cap .ghl { flex: none; white-space: nowrap; margin: -6px -8px 0 0; color: var(--ink); }

@media (max-width: 1100px) {
  .hero h1 { grid-column: 1 / 7; }
  .hero .row { grid-column: 1 / 7; }
  .demo { grid-column: 1 / 7; grid-row: 3; margin: 44px 0 0; max-width: 560px; }
}
@media (max-width: 700px) {
  .hero { grid-template-columns: 1fr; }
  .hero h1, .hero .row, .demo { grid-column: 1; }
  .hero .row { padding-right: 0; }
  .demo { margin: 36px 0 0; }
  .demo-top .t-lg { display: none; }
  .demo-top .t-sm { display: inline; }
  .dstatus { min-height: 48px; } /* room for a two-line message, so the panel never jumps */
  .stage { height: 340px; }
}

/* ---------- open source: eroll featured ---------- */
.ef { display: grid; grid-template-columns: repeat(6, 1fr); padding-bottom: 44px; margin-bottom: 30px; border-bottom: 1px solid var(--ink); }
.ef-intro { grid-column: 1 / 3; padding-right: 32px; display: flex; flex-direction: column; align-items: flex-start; }
.ef-intro .lang { font: 400 11px/1.5 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.ef-intro h3 { margin: 10px 0 12px; font: 800 clamp(48px, 5vw, 72px)/.9 var(--sans); letter-spacing: -.04em; }
.ef-lede { margin: 0 0 16px; font: 500 20px/1.35 var(--sans); letter-spacing: -.01em; }
.ef-note { margin: 0 0 22px; font-size: 14px; line-height: 1.5; color: var(--ink-2); }
.ghl { font: 500 13px/1 var(--sans); text-decoration: none; color: inherit; margin-left: -8px; padding: 7px 8px 8px;
  background: linear-gradient(var(--ink), var(--ink)) no-repeat 8px calc(100% - 4px) / calc(100% - 16px) 1px; transition: background-color .2s ease, color .2s ease; }
.ghl:hover { background: var(--cobalt); color: #fff; }
.ef-steps { grid-column: 3 / 7; list-style: none; margin: 0; padding: 0; }
.ef-steps li { display: grid; grid-template-columns: 1fr 3fr; border-top: 1px solid var(--rule); padding: 14px 0 15px; }
.ef-steps li:first-child { border-top: 0; padding-top: 2px; }
.ef-steps > li > b { grid-row: 1; grid-column: 1; font: 500 12px/1.6 var(--mono); color: var(--cobalt); }
.ef-steps h4 { grid-row: 1; grid-column: 1; margin: 0 0 0 34px; font: 600 18px/1.3 var(--sans); letter-spacing: -.01em; }
.ef-steps p { grid-row: 1; grid-column: 2; margin: 0; font-size: 15.5px; line-height: 1.5; color: #3c3a35; }
#open-source .oss { grid-template-columns: 1fr 1fr; }
@media (max-width: 1100px) {
  .ef-intro { grid-column: 1 / 7; padding: 0 0 26px; }
  .ef-steps { grid-column: 1 / 7; }
  #open-source .oss { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .ef { grid-template-columns: 1fr; }
  .ef-intro, .ef-steps { grid-column: 1; }
  .ef-steps li { grid-template-columns: 1fr; }
  .ef-steps p { grid-row: 2; grid-column: 1; margin-top: 4px; }
}

/* the AI "thinking" indicator */
.think { display: inline-flex; align-items: center; gap: 7px; text-transform: none; letter-spacing: 0; font: 500 12px/1 var(--sans); }
.think i { font-style: normal; color: var(--cobalt); font-size: 13px; display: inline-block; animation: spin 2.4s linear infinite; }
.think span { background: linear-gradient(90deg, var(--ink) 0%, var(--ink) 35%, #9fb0e6 50%, var(--ink) 65%, var(--ink) 100%);
  background-size: 250% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: shimmer 1.6s linear infinite;
  line-height: 1.4; padding: 1px 0 2px; } /* tall enough that descenders (g, y) sit inside the painted background */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer { from { background-position: 100% 0; } to { background-position: -150% 0; } }
@media (prefers-reduced-motion: reduce) { .think i, .think span { animation: none; } .think span { color: var(--ink); background: none; } }

/* ---------- eroll feature: a picture per stage ---------- */
.ef-steps li { grid-template-columns: 1fr 2fr 1fr; align-items: start; }
.ef-steps p { padding-right: 28px; }
.viz { grid-row: 1; grid-column: 3; position: relative; height: 66px; border: 1px solid var(--ink); background: #fbf9f4; overflow: hidden; font-family: var(--mono); }
.viz .cap { position: absolute; left: 8px; bottom: 5px; font: 500 9px/1 var(--mono); color: var(--muted); letter-spacing: .04em; text-transform: uppercase; }
/* 01 download */
.v-dl .win { display: flex; align-items: center; gap: 4px; padding: 6px 8px; border-bottom: 1px solid var(--rule); font-size: 9px; color: var(--ink-2); }
.v-dl .win i { width: 6px; height: 6px; border-radius: 50%; background: #d8d1c2; }
.v-dl .win span { margin-left: 6px; }
.v-dl .dlbar { margin: 9px 8px 0; height: 6px; background: #e6e1d6; }
.v-dl .dlbar b { display: block; height: 100%; width: 0; background: var(--cobalt); transition: width 1.6s cubic-bezier(.3,.7,.2,1) .2s; }
li.in .v-dl .dlbar b { width: 72%; }
/* 02 captcha */
.v-cap svg { position: absolute; left: 8px; top: 6px; width: calc(100% - 16px); height: 38px; background: #eef0f5; }
.v-cap .strike { transition: opacity .5s .3s; }
li.in .v-cap .strike { opacity: 0; }
.v-cap .gb rect { fill: none; stroke: var(--cobalt); stroke-width: 1.2; opacity: 0; transition: opacity .2s; }
li.in .v-cap .gb rect { opacity: 1; }
li.in .v-cap .gb rect:nth-child(1) { transition-delay: 0.92s; }
li.in .v-cap .gb rect:nth-child(2) { transition-delay: 1.04s; }
li.in .v-cap .gb rect:nth-child(3) { transition-delay: 1.16s; }
li.in .v-cap .gb rect:nth-child(4) { transition-delay: 1.28s; }
li.in .v-cap .gb rect:nth-child(5) { transition-delay: 1.40s; }
li.in .v-cap .gb rect:nth-child(6) { transition-delay: 1.52s; }

/* 03 detect: a 3-column page of boxes, outlined in turn */
.v-det { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; padding: 7px; background: #f7f3ea; }
.v-det i { border: 1px solid #b9b2a3; background: repeating-linear-gradient(#f7f3ea 0 3px, #d9d2c3 3px 4px); transition: border-color .2s, box-shadow .2s; }
li.in .v-det i { border-color: var(--cobalt); box-shadow: inset 0 0 0 1px var(--cobalt); }
li.in .v-det i:nth-child(1) { transition-delay: 0.25s; }
li.in .v-det i:nth-child(2) { transition-delay: 0.35s; }
li.in .v-det i:nth-child(3) { transition-delay: 0.45s; }
li.in .v-det i:nth-child(4) { transition-delay: 0.55s; }
li.in .v-det i:nth-child(5) { transition-delay: 0.65s; }
li.in .v-det i:nth-child(6) { transition-delay: 0.75s; }
li.in .v-det i:nth-child(7) { transition-delay: 0.85s; }
li.in .v-det i:nth-child(8) { transition-delay: 0.95s; }
li.in .v-det i:nth-child(9) { transition-delay: 1.05s; }

/* 04 read: blur clears */
.v-read .txt { position: absolute; left: 8px; top: 12px; font: 600 17px/1 var(--mono); letter-spacing: .03em; filter: blur(2.4px); opacity: .6; transition: filter 1s .3s, opacity 1s .3s; }
li.in .v-read .txt { filter: none; opacity: 1; }
/* 05 verify */
.v-ver { display: grid; grid-template-columns: 1fr 1fr 34px; align-items: center; padding: 0 8px; }
.v-ver div span { display: block; font: 500 9px/1 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.v-ver div b { font: 800 26px/1.1 var(--sans); }
.v-ver em { font-style: normal; font: 600 22px/1 var(--sans); color: #1f7a4d; opacity: 0; transform: scale(.6); transition: opacity .3s .7s, transform .3s .7s; }
li.in .v-ver em { opacity: 1; transform: none; }
/* 06 search */
.v-srch .pair { display: flex; gap: 6px; align-items: baseline; padding: 9px 8px 0; font: 600 13px/1 var(--mono); }
.v-srch .pair u { text-decoration: none; background: var(--cobalt); color: #fff; padding: 0 1px; }
.v-srch .to { color: var(--muted); font-weight: 400; }
.v-srch .mtr { position: relative; margin: 8px 8px 0; height: 6px; background: #e6e1d6; }
.v-srch .mtr b { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--cobalt); transition: width 1s cubic-bezier(.2,.8,.2,1) .4s; }
.v-srch .mtr s { position: absolute; left: 80%; top: -3px; bottom: -3px; width: 2px; background: var(--ink); }
li.in .v-srch .mtr b { width: 87%; }
/* what it produces */
.ef-out { margin: 30px 0 0; width: 100%; }
.ef-out figcaption { font: 500 10px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: 8px; }
.ef-out code { font: inherit; color: var(--ink); text-transform: none; }
.ef-out table { width: 100%; border-collapse: collapse; font: 400 12px/1.5 var(--mono); border-top: 1px solid var(--ink); }
.ef-out th { text-align: left; font-weight: 500; color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .06em; padding: 6px 8px 5px 0; border-bottom: 1px solid var(--rule); }
.ef-out td { padding: 5px 8px 4px 0; border-bottom: 1px solid var(--rule); }
.ef-out tr:nth-child(4) td { background: rgba(31,68,184,.08); }
@media (max-width: 700px) {
  .ef-steps li { grid-template-columns: 1fr; }
  .viz { grid-row: 3; grid-column: 1; margin-top: 12px; }
  .ef-steps p { padding-right: 0; }
}
@media (prefers-reduced-motion: reduce) { .viz *, .viz { transition: none !important; } }