:root{
  --ink:#0e1116; --panel:#161b22; --panel2:#1b212b; --line:#242c38;
  --text:#e7e4db; --muted:#9aa4b2; --amber:#e0a441; --amber-soft:#f4cd7e;
  --radius:14px; --max:960px;
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--ink);color:var(--text);font-family:var(--sans);
  line-height:1.6;-webkit-font-smoothing:antialiased;
  background-image:radial-gradient(1200px 500px at 50% -8%,rgba(224,164,65,.10),transparent 70%);
}
a{color:inherit;text-decoration:none}
img{display:block}

/* nav */
.nav{max-width:var(--max);margin:0 auto;padding:20px 24px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em;color:var(--text)}
.brand span{color:var(--text)}
.brand-tld{font-size:11px;color:var(--amber-soft);font-weight:600;vertical-align:super;margin-left:1px;letter-spacing:0}
.nav nav{display:flex;gap:22px;align-items:center;font-size:14.5px;color:var(--muted)}
.nav nav a:hover{color:var(--text)}
.nav .ghost{border:1px solid var(--line);padding:7px 13px;border-radius:9px;color:var(--text)}
.nav .ghost:hover{border-color:var(--amber);color:var(--amber-soft)}

/* announcement bar */
.announce{max-width:var(--max);margin:0 auto;display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:9px 24px;font-size:14px;color:#cfd3da;border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(224,164,65,.09),transparent 60%)}
.announce[hidden]{display:none}
.announce-tag{font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:#1a1205;background:var(--amber);padding:2.5px 9px;border-radius:999px;white-space:nowrap}
.announce-msg{color:var(--text)}
.announce a{color:var(--amber-soft);font-weight:600;text-decoration:none}
.announce a:hover{color:var(--amber)}
.announce-x{margin-left:auto;background:none;border:none;color:var(--muted);font-size:20px;
  line-height:1;cursor:pointer;padding:0 4px}
.announce-x:hover{color:var(--text)}
@media(max-width:560px){.announce-msg{flex:1 1 100%;order:3}}

/* hero */
main{max-width:var(--max);margin:0 auto;padding:0 24px}
.hero{text-align:center;padding:56px 0 28px}
.hero-mark{margin:0 auto 22px;color:var(--text);filter:drop-shadow(0 6px 24px rgba(224,164,65,.18))}
.amber{color:var(--amber-soft)}

/* hero brand — the animated "engram.is" URL assembly */
.hero-brand{font-family:var(--mono);font-size:clamp(22px,3.6vw,33px);letter-spacing:-.5px;
  font-weight:600;color:var(--text);position:relative;display:inline-block;margin:0 0 20px;padding-bottom:3px}
.hb-dot{color:var(--amber)}
.hb-tld{color:var(--amber-soft)}
.hb-seg{opacity:0;transition:opacity .32s ease}
.hb-seg.in{opacity:1}
/* URL-style underline: dotted, dense, light, sitting close under the text */
.hero-brand::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;width:0;margin:0 auto;
  background-image:radial-gradient(circle, rgba(231,228,219,.62) 1.1px, transparent 1.5px);
  background-size:5px 3px;background-repeat:repeat-x;background-position:left center;
  transition:width .34s ease}
.hero-brand.lit::after{width:100%}
.hero-brand.enter{animation:brandpulse .55s ease}
@keyframes brandpulse{30%{text-shadow:0 0 24px rgba(224,164,65,.6)}100%{text-shadow:none}}

/* hero tagline — "A memory that" is a fixed line; only the word below cycles, so nothing reflows.
   min-height reserves both lines so erasing the word never collapses the line (no paragraph jump). */
.hero-tagline{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:0;
  margin:0 0 18px;min-height:2.16em;
  font-size:clamp(38px,7vw,64px);line-height:1.06;letter-spacing:-.03em;font-weight:800;
  opacity:0;transform:translateY(10px);transition:opacity .55s ease, transform .55s ease}
.hero-tagline.in{opacity:1;transform:none}
.ht-lead{color:var(--text)}
.ht-rot{display:inline-flex;align-items:baseline;justify-content:center;white-space:nowrap;min-height:1.06em}
.rotator{color:var(--amber-soft);transition:color .25s}
.rotator-caret{display:inline-block;width:3px;height:.86em;margin-left:3px;vertical-align:-0.02em;
  background:var(--amber);animation:caretblink 1.05s steps(1) infinite;border-radius:1px}
@keyframes caretblink{50%{opacity:0}}
@media(prefers-reduced-motion:reduce){
  .rotator-caret{display:none}
  .hb-seg{opacity:1}
  .hero-brand::after{width:100%}
  .hero-tagline{opacity:1;transform:none}
}
.lede{max-width:640px;margin:0 auto 26px;color:#cfd3da;font-size:clamp(16px,2.4vw,19px)}
.lede strong{color:var(--text)}
.cta{display:flex;gap:12px;justify-content:center;margin-bottom:34px;flex-wrap:wrap}
.btn{background:var(--amber);color:#1a1205;font-weight:700;padding:12px 22px;border-radius:11px;font-size:15px;border:1px solid transparent;transition:.15s}
.btn:hover{background:var(--amber-soft);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--amber);color:var(--amber-soft);transform:translateY(-1px)}

/* terminal blocks */
.term{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;text-align:left;font-family:var(--mono);font-size:13.5px;line-height:1.7;
  color:#cdd3dc;overflow-x:auto;max-width:660px;margin:0 auto;box-shadow:0 14px 40px rgba(0,0,0,.35)}
.term .p{color:var(--amber)}
.term .s{color:#e7e4db}
.term .c{color:var(--muted)}

/* bands */
.band{padding:56px 0;border-top:1px solid var(--line)}
.band.alt{background:linear-gradient(180deg,rgba(27,33,43,.5),transparent)}
.band h2{font-size:clamp(26px,4vw,34px);letter-spacing:-.02em;margin:0 0 6px;text-align:center}
.sub{color:var(--muted);text-align:center;margin:0 auto 30px;max-width:560px}

/* thesis grid */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 20px;transition:.18s}
.card:hover{border-color:rgba(224,164,65,.5);transform:translateY(-2px)}
.card h3{margin:0 0 8px;font-size:18px;color:var(--amber-soft);letter-spacing:-.01em}
.card p{margin:0;color:#c7ccd4;font-size:15px}
.card strong{color:var(--text)}
.card code{font-family:var(--mono);font-size:12.5px;background:var(--panel2);border:1px solid var(--line);padding:1px 6px;border-radius:6px;color:#e7e4db}

/* how-it-works steps */
.steps{display:grid;grid-template-columns:1fr 1fr;gap:18px 30px;max-width:760px;margin:0 auto}
.step{display:flex;gap:15px;align-items:flex-start}
.step .n{flex:none;width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:rgba(224,164,65,.12);border:1px solid rgba(224,164,65,.4);color:var(--amber-soft);font-weight:700;font-family:var(--mono)}
.step h4{margin:2px 0 4px;font-size:16px}
.step p{margin:0;color:var(--muted);font-size:14.5px}

/* install */
#install .term{margin-bottom:16px}
.fine{text-align:center;color:var(--muted);font-size:14px;max-width:600px;margin:8px auto 0}
.fine code,#install code{font-family:var(--mono);font-size:12.5px;background:var(--panel2);border:1px solid var(--line);padding:1px 6px;border-radius:6px;color:#e7e4db}

/* footer */
footer{max-width:var(--max);margin:0 auto;padding:30px 24px 48px;
  border-top:1px solid var(--line);color:var(--muted);font-size:14px;
  display:flex;flex-direction:column;gap:14px}
footer a{color:var(--muted);transition:color .15s}
footer a:hover{color:var(--amber-soft)}
footer .muted{color:var(--muted);font-style:italic}

@media(max-width:680px){
  .grid,.steps{grid-template-columns:1fr}
  .nav nav a:not(.ghost){display:none}
}

/* ── docs ──────────────────────────────────────────────────────────────────── */
.brand-docs{color:var(--amber-soft);font-weight:600;font-size:14px;margin-left:2px;
  border:1px solid var(--line);border-radius:6px;padding:1px 7px}
.docs-shell{max-width:1080px;margin:0 auto;padding:8px 24px 64px;display:grid;
  grid-template-columns:210px 1fr;gap:44px;align-items:start}
.docs-nav{position:sticky;top:20px;display:flex;flex-direction:column;gap:3px;padding-top:14px}
.ds-label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.08em;
  margin:0 0 10px 10px;font-weight:600}
.ds-link{display:block;padding:7px 11px;border-radius:8px;color:var(--muted);font-size:14.5px;
  border-left:2px solid transparent;transition:.14s}
.ds-link:hover{color:var(--text);background:var(--panel)}
.ds-link.active{color:var(--amber-soft);background:var(--panel);border-left-color:var(--amber)}
.docs-main{min-width:0}
.docs-body{color:#cdd2da;font-size:16px;line-height:1.72}
.docs-body h1{font-size:clamp(28px,4vw,38px);letter-spacing:-.02em;margin:6px 0 18px;color:var(--text)}
.docs-body h2{font-size:24px;letter-spacing:-.01em;margin:38px 0 12px;padding-top:14px;
  border-top:1px solid var(--line);color:var(--text)}
.docs-body h3{font-size:18px;margin:26px 0 8px;color:var(--amber-soft)}
.docs-body p{margin:0 0 15px}
.docs-body strong{color:var(--text)}
.docs-body em{color:#dfe3ea}
.docs-body a{color:var(--amber-soft);text-decoration:underline;text-underline-offset:2px}
.docs-body a:hover{color:var(--amber)}
.docs-body ul,.docs-body ol{margin:0 0 15px;padding-left:22px}
.docs-body li{margin:5px 0}
.docs-body code{font-family:var(--mono);font-size:13.5px;background:var(--panel2);
  border:1px solid var(--line);padding:1.5px 6px;border-radius:6px;color:#e7e4db}
.docs-body pre{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;overflow-x:auto;margin:0 0 18px;box-shadow:0 10px 30px rgba(0,0,0,.28)}
.docs-body pre code{background:none;border:none;padding:0;font-size:13px;line-height:1.7;color:#cdd3dc}
.docs-body blockquote{margin:0 0 18px;padding:12px 18px;border-left:3px solid var(--amber);
  background:var(--panel);border-radius:0 10px 10px 0;color:#dfe3ea}
.docs-body blockquote p{margin:0}
.docs-body table{width:100%;border-collapse:collapse;margin:0 0 20px;font-size:14.5px}
.docs-body th,.docs-body td{border:1px solid var(--line);padding:9px 13px;text-align:left;vertical-align:top}
.docs-body th{background:var(--panel2);color:var(--text);font-weight:600}
.docs-body td{color:#c7ccd4}
.docs-body hr{border:none;border-top:1px solid var(--line);margin:28px 0}
.docs-body img{max-width:100%;margin:8px auto 22px;border-radius:10px}
.docs-foot{margin-top:44px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
@media(max-width:760px){
  .docs-shell{grid-template-columns:1fr;gap:10px}
  .docs-nav{position:static;flex-direction:row;flex-wrap:wrap;gap:6px;
    border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:8px}
  .ds-label{display:none}
  .ds-link{border-left:none;border:1px solid var(--line);font-size:13px;padding:6px 10px}
}

/* ── tabbed "see it work" demo ─────────────────────────────────────────────── */
.demo-tabs{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;max-width:820px;margin:0 auto 22px}
.demo-tab{background:var(--panel);border:1px solid var(--line);color:var(--muted);
  font:inherit;font-size:14px;padding:9px 16px;border-radius:999px;cursor:pointer;
  transition:border-color .15s,color .15s,background .15s}
.demo-tab:hover{color:var(--text);border-color:rgba(224,164,65,.4)}
.demo-tab.active{color:#1a1205;background:var(--amber);border-color:var(--amber);font-weight:600}
.demo-panels{max-width:760px;margin:0 auto}
.demo-panel{display:none} .demo-panel.active{display:block}
.demo-term{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;font-family:var(--mono);font-size:15.5px;line-height:1.9;color:#cdd3dc;
  min-height:182px;box-shadow:0 18px 48px rgba(0,0,0,.4);overflow-x:auto}
.demo-term .p{color:var(--amber)} .demo-term .s{color:#e7e4db}
.demo-term .c{color:var(--muted)} .demo-term .k{color:var(--amber-soft)} .demo-term .w{color:#d98c6a}
.demo-line{white-space:pre-wrap;word-break:break-word}
.demo-cursor{color:var(--amber);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.reveal{opacity:0;transform:translateY(4px);transition:opacity .35s ease, transform .35s ease}
.reveal.in{opacity:1;transform:none}
.demo-desc{margin:18px auto 0;max-width:680px;color:#c7ccd4;font-size:15.5px;line-height:1.7;text-align:center}
.demo-desc strong{color:var(--text)} .demo-desc em{color:var(--amber-soft);font-style:normal}
.demo-desc code{font-family:var(--mono);font-size:13px;background:var(--panel2);border:1px solid var(--line);padding:1px 6px;border-radius:6px;color:#e7e4db}
.demo-replay{margin-top:22px;text-align:center}
.demo-replay button{background:none;border:none;color:var(--amber-soft);font:inherit;cursor:pointer;text-decoration:underline;padding:0}
.demo-replay button:hover{color:var(--amber)}

/* get-updates form */
.updates-form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;max-width:480px;margin:0 auto}
.updates-form input{flex:1 1 260px;min-width:0;background:var(--panel);border:1px solid var(--line);
  border-radius:11px;color:var(--text);font:inherit;font-size:15px;padding:12px 15px;transition:border-color .15s}
.updates-form input::placeholder{color:var(--muted)}
.updates-form input:focus{outline:none;border-color:var(--amber)}
.updates-form .btn{flex:none}
.updates-msg{min-height:1.2em;margin-top:14px}
.updates-msg[data-state="ok"]{color:var(--amber-soft);font-style:normal}
.updates-msg[data-state="err"]{color:#d98c6a;font-style:normal}

/* footer rows */
.foot-row{display:flex;align-items:center;gap:9px;flex-wrap:wrap;row-gap:6px}
.foot-name{color:var(--text);font-weight:700}
/* middot separators before each meta item after the name (source · Apache · Provenance) */
.foot-meta > a::before,
.foot-meta > span::before{content:"·";color:var(--line);margin-right:9px}
.foot-by{font-size:13.5px}
/* clickable brand chips with logos */
.foot-brand{display:inline-flex;align-items:center;gap:7px;color:var(--text)!important;
  font-weight:600;padding:3px 9px 3px 6px;border:1px solid var(--line);border-radius:999px;
  background:var(--panel);transition:border-color .15s,transform .15s}
.foot-brand img{border-radius:5px}
.foot-brand:hover{border-color:var(--amber);color:var(--amber-soft)!important;transform:translateY(-1px)}
.foot-by .amp{color:var(--muted)}

@media(max-width:680px){
  .demo-tabs{gap:6px}
  .demo-tab{font-size:13px;padding:8px 13px}
  .demo-term{font-size:13.5px;padding:18px 18px}
}