@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400&display=swap');
/* Crucible — Enterprise ("blueprint"): navy drafting sheet, cyan ink, graph grid. Own world. */
:root{
  --navy:#0a1a2b; --navy2:#0c2033; --panel:#0d2135;
  --ink:#e9f1f8; --steel:#9fb4c6; --faint:#8ba1b0;
  --line:rgba(107,161,189,.18); --grid:rgba(107,161,189,.05);
  --cy:#6ba1bd; --cy-d:#4f88a0;
  --sans:'IBM Plex Sans',system-ui,-apple-system,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --disp:'Space Grotesk',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--navy);color:var(--ink);font-family:var(--sans);font-size:16.5px;line-height:1.6;-webkit-font-smoothing:antialiased;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:33px 33px}
img{max-width:100%;display:block}
::selection{background:rgba(107,161,189,.24)}

.reveal{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* nav */
nav#nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:16px clamp(20px,5vw,64px);
  background:rgba(10,26,43,.74);backdrop-filter:blur(9px);border-bottom:1px solid transparent;transition:border-color .3s,background .3s}
nav#nav.scrolled{border-bottom-color:var(--line);background:rgba(10,26,43,.92)}
.wordmark{font-family:var(--disp);font-weight:700;font-size:16px;letter-spacing:.04em;text-transform:uppercase;text-decoration:none;color:var(--ink);display:inline-flex;align-items:center;gap:8px}
.wordmark a{color:inherit;text-decoration:none}
.wordmark .wm-sep{color:var(--cy);font-weight:400;margin:0 .4em}
.navlinks{display:flex;align-items:center;gap:clamp(13px,2vw,24px);font-family:var(--mono);font-size:12.5px;letter-spacing:.02em}
.navlinks a{color:var(--steel);text-decoration:none;transition:color .2s}
.navlinks a:hover,.navlinks a.active{color:var(--cy)}
.navlinks .book{color:var(--cy);border:1px solid var(--line);padding:6px 12px}
.navlinks .book:hover{border-color:var(--cy)}
.svc{position:relative;display:inline-block}
.svc>summary{list-style:none;cursor:pointer;color:var(--steel);display:inline-flex;align-items:center;gap:6px;transition:color .2s}
.svc>summary::-webkit-details-marker{display:none}
.svc>summary::after{content:"";width:6px;height:6px;border-right:1.4px solid var(--cy);border-bottom:1.4px solid var(--cy);transform:rotate(45deg);margin-top:-3px}
.svc[open]>summary,.svc>summary:hover{color:var(--cy)}
.svc-menu{position:absolute;top:calc(100% + 12px);left:0;display:flex;flex-direction:column;gap:1px;background:var(--panel);border:1px solid var(--line);padding:7px;min-width:196px;z-index:60;box-shadow:0 20px 44px rgba(0,0,0,.5)}
.svc-menu a{padding:10px 12px;text-decoration:none;color:var(--steel);white-space:nowrap}
.svc-menu a:hover{color:var(--cy);background:rgba(107,161,189,.07)}
@media(max-width:560px){.svc-menu{left:auto;right:0}}

/* layout */
section{max-width:1140px;margin:0 auto;padding:clamp(44px,7vh,88px) clamp(20px,5vw,64px)}
.hero{padding-top:clamp(46px,8vh,92px)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.05em;text-transform:uppercase;color:var(--cy);display:inline-flex;align-items:center;gap:9px;margin-bottom:20px}
.eyebrow::before{content:"//";color:var(--cy);opacity:.55}
h1{font-family:var(--disp);font-weight:700;font-size:clamp(2.4rem,5.8vw,4.5rem);line-height:1.02;letter-spacing:-.025em;margin:0 0 22px;max-width:16ch;color:var(--ink)}
h2{font-family:var(--disp);font-weight:700;font-size:clamp(1.7rem,3.5vw,2.75rem);line-height:1.08;letter-spacing:-.02em;margin:0 0 14px;max-width:22ch;color:var(--ink)}
.gold{color:var(--cy)}
.dim{color:var(--steel)}
.lead{font-size:clamp(1.06rem,1.6vw,1.3rem);line-height:1.55;color:var(--steel);max-width:62ch;margin:0 0 26px}
.authline{font-family:var(--mono);font-size:.82rem;line-height:1.6;color:var(--faint);max-width:74ch;margin:22px 0 0}

.cta{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--cy);background:transparent;border:1px solid var(--cy);padding:14px 24px;text-decoration:none;transition:background .2s,color .2s}
.cta:hover{background:var(--cy);color:var(--navy)}
.cta .arw{transition:transform .2s}
.cta:hover .arw{transform:translateX(3px)}
.cta-link{color:var(--cy);text-decoration:none;font-family:var(--mono);font-size:.9rem;border-bottom:1px solid var(--line)}
.cta-link:hover{border-bottom-color:var(--cy)}

/* the engine — drawn on the sheet, framed with corner ticks */
.engine{position:relative;margin:clamp(32px,5vh,52px) 0 0;border:1px solid var(--line);padding:clamp(26px,4vw,46px) clamp(18px,4vw,40px)}
.engine::before,.engine::after{content:"";position:absolute;width:15px;height:15px;border:1.6px solid var(--cy)}
.engine::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.engine::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.engine svg{width:100%;height:auto;max-width:880px;margin:0 auto;display:block}
.engine-cap{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--steel);margin:16px 0 0}
.engine-stack{display:none}
@media(max-width:640px){
  .engine svg,.engine-cap{display:none}
  .engine{padding:22px 18px}
  .engine-stack{display:flex;flex-direction:column;gap:16px}
  .engine-stack .est{display:grid;grid-template-columns:30px 1fr;align-items:baseline;gap:2px 12px}
  .engine-stack .est .ei{grid-row:span 2;font-family:var(--mono);font-size:11px;color:var(--cy)}
  .engine-stack .est h3{font-family:var(--disp);font-weight:700;font-size:1.2rem;color:var(--ink);margin:0}
  .engine-stack .est p{grid-column:2;color:var(--steel);font-size:.92rem;margin:0}
  .engine-stack .eloop{font-family:var(--mono);font-size:10.5px;color:var(--cy);padding-left:42px}
}

/* spec list */
.reqs{list-style:none;margin:26px 0 0;padding:0;max-width:66ch;border-top:1px solid var(--line)}
.reqs li{position:relative;padding:15px 0 15px 30px;border-bottom:1px solid var(--line);color:var(--steel);font-size:1.02rem;line-height:1.5}
.reqs li::before{content:"+";position:absolute;left:4px;top:14px;color:var(--cy);font-family:var(--mono)}
.reqs.nots li::before{content:"\2013"}

/* stat panel */
.proofstrip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);margin-top:24px;background:rgba(12,32,51,.4)}
.proofstrip .pf{padding:24px 20px;border-left:1px solid var(--line)}
.proofstrip .pf:first-child{border-left:0}
.pf .n{font-family:var(--disp);font-weight:700;font-size:clamp(1.55rem,3vw,2.35rem);color:var(--ink);letter-spacing:-.01em;line-height:1}
.pf .l{font-family:var(--mono);font-size:10.5px;letter-spacing:.07em;text-transform:uppercase;color:var(--steel);margin-top:9px}
@media(max-width:680px){.proofstrip{grid-template-columns:1fr 1fr}.proofstrip .pf:nth-child(3),.proofstrip .pf:nth-child(4){border-top:1px solid var(--line)}.proofstrip .pf:nth-child(3){border-left:0}}

/* quote */
.quote-sec{max-width:900px}
.bigquote{font-family:var(--disp);font-weight:500;font-size:clamp(1.4rem,3vw,2.15rem);line-height:1.3;letter-spacing:-.01em;color:var(--ink);margin:0;padding-left:26px;border-left:2px solid var(--cy)}
.cite{font-family:var(--mono);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--steel);margin-top:18px;padding-left:26px}

/* routing */
.routes{display:grid;gap:12px;margin-top:24px;max-width:800px}
.routes a{display:flex;justify-content:space-between;align-items:baseline;gap:18px;border:1px solid var(--line);padding:18px 22px;text-decoration:none;color:inherit;transition:border-color .2s,background .2s}
.routes a:hover{border-color:var(--cy);background:rgba(107,161,189,.05)}
.routes .r-t{font-family:var(--disp);font-weight:500;font-size:1.12rem;color:var(--ink)}
.routes .r-d{font-family:var(--mono);color:var(--steel);font-size:.84rem;text-align:right}
.routes .r-go{color:var(--cy)}

.close{text-align:center}
.close h2{margin:0 auto 36px;max-width:22ch}

footer{border-top:1px solid var(--line);max-width:1140px;margin:0 auto;padding:30px clamp(20px,5vw,64px);display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:10px;font-family:var(--mono);font-size:12px;color:var(--faint)}
footer a{color:var(--steel);text-decoration:none}
footer a:hover{color:var(--cy)}

/* --- inner pages --- */
:root{--accent-rgb:107,161,189}
section.tight{padding-top:clamp(24px,3.5vh,46px);padding-bottom:clamp(24px,3.5vh,46px)}
.phases{display:grid;gap:14px;margin-top:28px;max-width:840px}
.phase{border:1px solid var(--line);padding:24px 26px}
.phase .when{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--cy);margin-bottom:10px}
.phase h3{font-family:var(--disp);font-weight:700;font-size:1.35rem;margin:0 0 8px;color:var(--ink)}
.phase p{color:var(--steel);margin:0;font-size:1rem;line-height:1.5}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,4vw,44px);margin-top:44px;border-top:1px solid var(--line);padding-top:38px}
.step .num{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--cy)}
.step h3{font-family:var(--disp);font-weight:700;font-size:1.3rem;margin:14px 0 8px;color:var(--ink)}
.step p{color:var(--steel);margin:0;font-size:1rem}
@media(max-width:760px){.steps{grid-template-columns:1fr;gap:28px}}
.embed{margin-top:44px;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff}
.embed iframe{width:100%;height:680px;border:0;display:block}
.pulse{display:block;width:100%;height:150px;margin-top:32px}

/* consistent brand wordmark across every world */
.wordmark{font-family:'Fraunces',Georgia,serif;font-weight:400;font-size:17px;letter-spacing:.02em;text-transform:uppercase;line-height:1}
.wordmark a{font-family:inherit;letter-spacing:inherit;text-decoration:none;color:inherit}
a.wordmark,.wordmark>a:first-of-type{border-bottom:1px solid currentColor;padding-bottom:3px}
.wordmark>a:last-of-type{border-bottom:0;padding-bottom:0;text-transform:none}
.wordmark .wm-sep{border-bottom:0}
footer .wm{font-family:var(--disp);font-weight:700;color:var(--ink)}
@media(max-width:600px){
  body{overflow-x:hidden}
  nav#nav{flex-wrap:wrap;row-gap:10px}
  .navlinks{width:100%;flex-wrap:wrap;gap:10px 14px}
}