:root{
  --canvas:#fafafa;
  --card:#ffffff;
  --ink:#111111;
  --muted:#6e6e6e;
  --dark:#111111;
  --term:#131210;
  --line:#e6e6e6;
  --line-soft:rgba(17,17,17,.08);
  --accent:#b45309;
  --cyan:#22d3ee;
  --mark:#f5b301;
  --r:12px;
  --r-lg:20px;
  --font:"Geist",-apple-system,BlinkMacSystemFont,"SF Pro Text",Inter,"Segoe UI",sans-serif;
  --mono:"Geist Mono",ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.6,.2,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;font-family:var(--font);background:var(--canvas);color:var(--ink);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
code{font-family:var(--mono);font-size:.85em;background:rgba(17,17,17,.06);border:1px solid var(--line-soft);padding:.08em .38em;border-radius:6px;white-space:nowrap}
pre{background:var(--term);color:#e7e5e4;border:1px solid #2a2825;border-radius:12px;padding:16px 18px;overflow:auto;font-family:var(--mono);font-size:12.8px;line-height:1.75;margin:14px 0 0}
pre code{background:none;border:0;padding:0;white-space:pre}
h1,h2,h3{line-height:1.05;letter-spacing:-.04em}
.muted{color:var(--muted)}
.small{font-size:14px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* NAV */
.nav{position:fixed;inset:0 0 auto 0;z-index:40;background:rgba(250,250,250,.8);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent}
.nav.scrolled{border-bottom-color:var(--line)}
.nav-inner{max-width:1120px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:12px 32px;min-height:64px}
.brand{display:flex;align-items:center;text-decoration:none;color:var(--ink);min-width:0}
.brand-mark{display:block;width:208px;height:25px;color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:2px}

/* BUTTONS */
.btn{position:relative;display:inline-flex;align-items:center;gap:9px;border-radius:12px;padding:12px 18px;font-family:var(--font);font-weight:600;font-size:15px;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:background .18s var(--ease),border-color .18s var(--ease)}
.btn .ic{flex:none}
.btn-sm{padding:10px 15px;font-size:14px;border-radius:11px}
.btn-lg{padding:15px 21px;font-size:15.5px;border-radius:13px}
.btn-dark{background:var(--dark);color:var(--canvas)}
.btn-dark:hover{background:#2b2b2b}
.btn-light{background:var(--card);color:var(--ink);border-color:var(--line)}
.btn-light:hover{border-color:#c9c9c9}
.btn-stat{font-family:var(--mono);font-size:11.5px;font-weight:400;border:1px solid currentColor;border-radius:999px;padding:2px 8px;opacity:.65}
.btn-slide{padding-right:38px}
.btn-slide .btn-arrow{position:absolute;right:13px;opacity:0;transition:opacity .2s var(--ease)}
.btn-slide:hover .btn-arrow{opacity:1}

/* LAYOUT */
main{position:relative;max-width:1120px;margin:0 auto;padding:128px 32px 30px}
.block{padding:72px 0 8px;border-top:1px solid var(--line);margin-top:72px}
.sec-label{font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.sec-title{font-size:clamp(32px,4.6vw,54px);margin:0 0 30px;max-width:16em}

/* HERO */
.hero{text-align:center;padding-bottom:8px}
.hero-title{font-size:clamp(46px,7.4vw,84px);margin:0;max-width:12em;margin-left:auto;margin-right:auto}
.hero-title mark{background:linear-gradient(transparent 62%,var(--mark) 62%);padding:0 .1em;color:inherit}
/* OS badge pinned to the S corner, cycles every 3s */
.s-wrap{position:relative;display:inline-block}
.os-badge{position:absolute;left:-26px;top:-40px;width:48px;height:48px;color:var(--ink)}
.os-badge svg{width:42px;height:42px}
.os-badge .os{position:absolute;inset:0;display:grid;place-items:center;opacity:0;transform:scale(.55) rotate(-14deg);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.os-badge .os.active{opacity:1;transform:none}
.hero-sub{font-size:18.5px;line-height:1.6;color:#3f3f3f;max-width:44em;margin:20px auto 0}
.hero-sub strong{color:var(--ink)}
.hero-sub mark{background:none;padding:0;color:var(--ink);font-weight:700;text-decoration:underline;text-decoration-color:var(--mark);text-decoration-thickness:3px;text-underline-offset:4px}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin:28px 0 10px}
.hero-caption{color:var(--muted);font-size:14px;margin:6px 0 0}
.hint{color:var(--muted);font-size:13.5px;display:flex;gap:8px;justify-content:center;align-items:center;margin:14px 0 0}
.hint svg{flex:none}

/* TERMINAL */
.demo-wrap{position:relative;max-width:780px;margin:38px auto 10px}
.corner{position:absolute;width:44px;height:48px;border:2.5px solid var(--ink);opacity:.5;z-index:2}
.corner.tl{top:-14px;left:-14px;border-right:0;border-bottom:0;border-radius:14px 0 0 0}
.corner.tr{top:-14px;right:-14px;border-left:0;border-bottom:0;border-radius:0 14px 0 0}
.corner.bl{bottom:-14px;left:-14px;border-right:0;border-top:0;border-radius:0 0 0 14px}
.corner.br{bottom:-14px;right:-14px;border-left:0;border-top:0;border-radius:0 0 14px 0}
.terminal-gif{display:block;width:100%;height:auto;border-radius:16px;box-shadow:0 24px 70px rgba(0,0,0,.18)}
/* shared terminal accents (GIF alt text + loop evidence strips) */
.p{color:#a8a29e}
.dim{color:#a8a29e}
.green{color:#4ade80}.red{color:#f87171}.cyan{color:var(--cyan)}
.choice-active{color:var(--cyan);font-weight:700}

/* SHARED BITS */
.card-kicker{font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0}
/* LOOP — annotated session */
.session{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start}
.transcript{background:var(--term);color:#e7e5e4;border:1px solid #2a2825;border-radius:16px;padding:26px 28px;font-family:var(--mono);font-size:13.5px;line-height:2.05;box-shadow:0 24px 70px rgba(0,0,0,.18)}
.t-row{margin:0}
.t-msg{display:inline-block;background:rgba(34,211,238,.09);border-left:3px solid var(--cyan);padding:2px 12px;border-radius:0 8px 8px 0;color:#fafaf9}
.ok{display:inline-flex;align-items:center;gap:8px;color:#4ade80;font-weight:700}
.sidenotes{position:sticky;top:96px;display:grid;gap:0}
.sidenote{padding:22px 0 22px 20px;border-left:2px solid var(--line)}
.js .sidenote{opacity:.45;transition:opacity .3s var(--ease)}
.js .sidenote.live{opacity:1;border-left-color:var(--mark)}
.sn-idx{font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;color:var(--muted);margin:0}
.sidenote h3{font-size:22px;margin:8px 0 6px}
.sidenote p{color:var(--muted);font-size:14.5px;margin:0}

/* PROVIDERS — spec table, no boxes */
.spec-table{border-top:1px solid var(--line)}
.spec-row{display:grid;grid-template-columns:130px 1fr 1fr;gap:16px;align-items:baseline;padding:13px 4px;border-bottom:1px solid var(--line-soft);font-size:14.5px}
.spec-row .mono{font-family:var(--mono);font-size:12.5px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.spec-head{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.spec-note{margin:18px 0 0;color:var(--muted);font-size:14px;max-width:70em}

/* PRIVACY — ruled columns, no boxes */
.rule-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.rule-col{border-top:2px solid var(--ink);padding-top:18px}
.tenet-idx{font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;color:var(--muted);margin:0}
.rule-col h3{font-size:20px;margin:12px 0 8px}
.rule-col p{color:var(--muted);font-size:14.5px;line-height:1.65;margin:0}
.warning{text-align:center;margin:26px auto 0;max-width:560px;font-size:15px}
.warning span{color:var(--muted)}

/* DOCS — terminal card grid, side by side */
.ref-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;min-width:0;align-items:stretch}
.ref-card{background:var(--term);border:1px solid #2a2825;border-radius:16px;padding:24px;min-width:0;max-width:100%;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 24px 70px rgba(0,0,0,.18)}
.ref-meta{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 10px;align-items:center;margin-bottom:14px;min-width:0}
.ref-meta .card-kicker{grid-column:1;grid-row:1;margin:0}
.ref-meta h3{grid-column:1;grid-row:2;font-size:19px;margin:0;color:#fafaf9}
.ref-meta p:not(.card-kicker){grid-column:1;grid-row:3;margin:0;font-size:13px;color:#a8a29e}
.ref-meta .copy-btn{grid-column:2;grid-row:1;background:#292524;border-color:#44403c;color:#a8a29e}
.ref-meta .copy-btn:hover{color:#fff;border-color:#6b6b6b}
.ref-card pre{margin:0;border:0;background:none;background-color:transparent;padding:2px 0 10px;min-width:0;min-height:0;max-width:100%;flex:1 1 auto;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;scrollbar-color:#57534e transparent;line-height:1.7;align-content:start}
.ref-card pre::-webkit-scrollbar{height:6px}
.ref-card pre::-webkit-scrollbar-track{background:transparent}
.ref-card pre::-webkit-scrollbar-thumb{background-color:#57534e;border-radius:999px}
.ref-card pre::-webkit-scrollbar-thumb:hover{background-color:#78716c}
.ref-card pre::-webkit-scrollbar-corner{background:transparent}
.ref-card code{font-size:12.2px;white-space:pre;word-break:normal;overflow-wrap:normal}
.copy-btn{flex:none;width:30px;height:30px;border-radius:9px;border:1px solid var(--line);background:var(--canvas);cursor:pointer;display:grid;place-items:center;color:var(--muted);transition:border-color .18s var(--ease),color .18s var(--ease)}
.copy-btn:hover{color:var(--ink);border-color:#c9c9c9}

/* CTA + FOOTER */
.bottom-cta{text-align:center;margin:0;padding:72px 0 26px;border-top:1px solid var(--line);margin-top:72px}
.bottom-cta h2.dl-title{font-size:30px;font-weight:400;letter-spacing:0;margin:0 0 34px}
.os-tabs{display:flex;justify-content:center;gap:6px;margin:0 0 30px}
.os-tab{display:flex;flex-direction:column;align-items:center;gap:9px;min-width:118px;border:0;border-radius:10px;background:none;padding:14px 22px;font-family:var(--font);font-size:13px;color:var(--ink);cursor:pointer}
.os-tab svg{display:block}
.os-tab[aria-selected="true"]{background:#f5f5f5}
.os-panels{display:grid;justify-items:center}
.os-panel{display:grid;justify-items:center;gap:0;width:100%;max-width:760px}
.os-panel[hidden]{display:none}
.os-panel p{margin:0}
.install-cmd{display:flex;align-items:center;gap:16px;justify-content:space-between;width:100%;background:#f5f5f5;color:#1a1a1a;border:0;border-radius:8px;padding:15px 20px;font-family:var(--mono);font-size:12.5px;cursor:pointer;min-width:0}
.install-cmd code{background:none;border:0;padding:0;white-space:nowrap;overflow-x:auto;color:inherit}
.install-cmd svg{flex:none;color:#737373}
.paste-hint{color:#525252;font-size:13px;margin-top:12px}
.or{color:#525252;font-size:13px;margin-top:10px}
.btn-dl{background:var(--mark);color:#1a1a1a;border-radius:999px;padding:14px 48px;font-size:16px;font-weight:600;margin-top:14px}
.btn-dl:hover{background:#dda200}
.install-cmd.copied,.copy-btn.copied{border-color:#16a34a}
.install-cmd.copied svg:not(.tick),.copy-btn.copied svg:not(.tick){display:none}
.install-cmd svg.tick,.copy-btn svg.tick{color:#16a34a}
.req{color:#1a1a1a;font-size:13px;margin-top:18px}
footer{text-align:center;padding:26px 0 0;overflow:hidden;border-top:1px solid var(--line);margin-top:20px}
.foot-marks{display:flex;justify-content:center;gap:22px;font-size:24px;color:var(--muted);user-select:none}
.foot-word{font-weight:800;font-size:clamp(64px,14vw,200px);letter-spacing:-.05em;line-height:.95;white-space:nowrap;color:transparent;-webkit-text-stroke:1px #d4d4d4;user-select:none;margin-top:6px}
/* EDGE SCROLLERS — vertical marquees filling the fullscreen side space.
   NOTE: edge-track content must be 2 identical groups with NO trailing
   dash/separator (no "—", "-", "•"). Spacing comes from padding/gap only,
   otherwise a dash glyph sits at the loop seam (top/bottom ends). */
.edge-marquee{position:fixed;top:0;bottom:0;width:76px;display:none;overflow:hidden;z-index:1;pointer-events:none;user-select:none;-webkit-mask-image:linear-gradient(to bottom,transparent 0,#000 48px,#000 calc(100% - 48px),transparent 100%);mask-image:linear-gradient(to bottom,transparent 0,#000 48px,#000 calc(100% - 48px),transparent 100%)}
.edge-marquee.left{left:0}
.edge-marquee.right{right:0}
.edge-track{display:flex;flex-direction:column;align-items:center;width:100%;gap:0;animation:edge-up 32s linear infinite;will-change:transform}
.edge-marquee.right .edge-track{animation-name:edge-down}
.edge-track span{writing-mode:vertical-rl;font-weight:800;font-size:42px;letter-spacing:.08em;white-space:nowrap;color:transparent;-webkit-text-stroke:1px #d4d4d4;padding:.6em 0;border:0}
.edge-track span:empty{display:none}
@keyframes edge-up{to{transform:translateY(-50%)}}
@keyframes edge-down{from{transform:translateY(-50%)}to{transform:translateY(0)}}
@media(min-width:1400px){.edge-marquee{display:block}}

/* REVEAL (progressive enhancement: hidden only when JS runs) */
.reveal{transition:opacity .5s var(--ease),transform .5s var(--ease)}
.js .reveal{opacity:0;transform:translateY(10px)}
.js .reveal.in{opacity:1;transform:none}

.hide-sm{}
@media(max-width:960px){
  .session{grid-template-columns:1fr}
  .sidenotes{position:static}
  .spec-row{grid-template-columns:110px 1fr}
  .spec-row .muted{display:none}
  .spec-head{display:none}
  .rule-cols{grid-template-columns:1fr;gap:20px}
  .ref-grid{grid-template-columns:1fr}
  .os-tab{min-width:96px;padding:12px 14px}
  .hide-sm{display:none}
  .nav-links a:not(.btn){display:none}
  main{padding:112px 20px 20px}
  .nav-inner{padding:12px 20px;min-height:60px}
  .corner{display:none}
  .os-badge{left:-18px;top:-27px;width:34px;height:34px}
  .os-badge svg{width:30px;height:30px}
}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}