/* Byteshark shared base.
   Loaded by the main pages (index, research, services, about, mako,
   security). The redirect stubs and 404.html keep their own CSS.
   Each page's <style> loads AFTER this file, so a page can still override
   anything here on cascade order. Page-specific layout stays in the page;
   tokens and shared components live here so the six pages drift together. */

/* ---------- tokens ---------- */
:root{
  color-scheme:dark;

  --bg:#0a0a0f;
  --bg-soft:#0e0d14;
  --panel:#131219;
  --panel-2:#17161f;
  --border:#232030;
  --border-hover:#3a3550;
  --edge:rgba(255,255,255,.045);       /* 1px top-edge highlight on raised surfaces */
  --text:#ECEAF4;
  --text-dim:#a6a2ba;
  --text-mid:#c6c2d8;
  --text-faint:#8a86a2;
  --lav:#B9AFE8;
  --lav-soft:#9a92c9;
  --lav-12:rgba(185,175,232,.12);
  --fill:#C4BBE8;
  --fill-hover:#d4ccf0;
  --fill-ink:#181521;
  --term:#7cbfa2;
  --red:#e2574b;
  --amber:#e0a72e;
  --green:#4fb477;

  --mono:'JetBrains Mono','JetBrains Mono Fallback',ui-monospace,'SF Mono',Menlo,monospace;
  --sans:'Inter','Inter Fallback',system-ui,-apple-system,sans-serif;

  /* type scale: four heading sizes, fluid between 360px and 1280px.
     Each has a rem term so browser zoom still works. Body stays fixed. */
  --t-display:clamp(2.6rem,1.4rem + 5.4vw,4.8rem);
  --t-h1:clamp(2.3rem,1.5rem + 3.6vw,3.8rem);
  --t-h2:clamp(1.85rem,1.4rem + 2vw,2.7rem);
  --t-h2s:clamp(1.6rem,1.3rem + 1.4vw,2.2rem);
  --t-h3:1.22rem;
  --t-body:1.08rem;
  --t-small:1rem;
  --t-meta:.72rem;

  /* spacing */
  --s-section:clamp(64px,40px + 5vw,100px);
  --s-hero-top:clamp(96px,64px + 5vw,132px);
  --s-gutter:24px;
  --s-card:clamp(22px,16px + 1.2vw,34px);

  /* radii */
  --r-xs:2px;
  --r-sm:6px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:18px;
  --r-pill:999px;

  /* motion */
  --ease-out:cubic-bezier(.23,1,.32,1);
  --ease-std:cubic-bezier(.2,0,0,1);
  --d-fast:.16s;
  --d-base:.22s;
  --d-slow:.6s;

  --maxw:1120px;
}

/* Metric-matched fallbacks so the swap from system font to the webfont
   does not shift layout. Values are Chrome's published Inter->Arial
   overrides; the mono one is tuned by eye for Courier New. */
@font-face{font-family:'Inter Fallback';src:local('Arial');size-adjust:107.4%;ascent-override:90.2%;descent-override:22.48%;line-gap-override:0%}
@font-face{font-family:'JetBrains Mono Fallback';src:local('Courier New');size-adjust:104%;ascent-override:102%;descent-override:27%;line-gap-override:0%}

/* ---------- base ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scrollbar-gutter:stable}
body{background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;font-feature-settings:'liga' 1,'calt' 1,'cv11' 1}
a{color:inherit;text-decoration:none;touch-action:manipulation}
button{touch-action:manipulation}
:focus-visible{outline:2px solid var(--lav);outline-offset:3px;border-radius:var(--r-sm)}
h1,h2,h3{font-family:var(--mono);font-weight:800;letter-spacing:-.02em;line-height:1.1;text-wrap:balance;font-variant-ligatures:none}
h1{font-size:var(--t-h1)}
h2{font-size:var(--t-h2)}
h3{font-size:var(--t-h3)}
p{color:var(--text-dim);font-size:var(--t-body);text-wrap:pretty}
time,.pmeta,.tabular{font-variant-numeric:tabular-nums}
.lav{color:var(--lav)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--s-gutter);width:100%}
.eyebrow{font-family:var(--mono);font-size:var(--t-meta);letter-spacing:.28em;text-transform:uppercase;color:var(--lav-soft);margin-bottom:20px;display:block;font-variant-ligatures:none;font-feature-settings:'case' 1}
.skip{position:absolute;left:8px;top:-48px;z-index:200;background:var(--fill);color:var(--fill-ink);font-family:var(--mono);font-size:.82rem;padding:10px 16px;border-radius:var(--r-md);transition:top var(--d-fast)}
.skip:focus{top:8px}
.progress{position:fixed;top:0;left:0;height:2px;background:var(--lav);width:0;z-index:100}

/* ---------- surfaces ---------- */
/* On near-black, elevation comes from light, not shadow: a stepped panel
   colour plus a 1px highlight on the top edge. */
.card,.pcard,.step,.teaser,.note,.rbox,.faq details,.empty,.covcard,.stat,.term{box-shadow:inset 0 1px 0 var(--edge)}

/* ---------- buttons ---------- */
.btn{font-family:var(--mono);font-size:.9rem;font-weight:500;letter-spacing:.01em;padding:14px 22px;border-radius:var(--r-md);display:inline-flex;align-items:center;gap:9px;cursor:pointer;border:1px solid transparent;transition:transform var(--d-base) var(--ease-out),background var(--d-base) var(--ease-out),border-color var(--d-base) var(--ease-out),box-shadow var(--d-base) var(--ease-out);font-variant-ligatures:none}
.btn .ar{transition:transform var(--d-base) var(--ease-out)}
.btn:hover .ar{transform:translateX(4px)}
.btn-primary{background:var(--fill);color:var(--fill-ink)}
.btn-primary:hover{transform:translateY(-2px);background:var(--fill-hover);box-shadow:0 8px 26px -12px rgba(185,175,232,.7)}
.btn-ghost{background:transparent;border-color:var(--border-hover);color:var(--text)}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--lav);color:var(--lav)}
.btn-sm{padding:10px 16px;font-size:.82rem}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- header / nav ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(10,10,15,.8);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);view-transition-name:site-header}
nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-family:var(--mono);font-weight:800;letter-spacing:.24em;font-size:1rem;display:inline-flex;align-items:center;gap:9px;transition:opacity var(--d-base)}
.logo:hover{opacity:.8}
.logo-mark{width:26px;height:auto;display:block;flex:none;image-rendering:-webkit-optimize-contrast}
.logo .dot{color:var(--lav)}
.navlinks{display:flex;align-items:center;gap:32px}
.navlinks a.nl{position:relative;font-family:var(--mono);font-size:.85rem;color:var(--text-dim);transition:color var(--d-base);padding:4px 0}
.navlinks a.nl::after{content:"";position:absolute;left:0;bottom:-2px;height:1px;width:100%;background:var(--lav);transform:scaleX(0);transform-origin:left;transition:transform .28s var(--ease-out)}
.navlinks a.nl:hover{color:var(--text)}
.navlinks a.nl:hover::after,.navlinks a.nl.active::after{transform:scaleX(1)}
.navlinks a.nl.active{color:var(--lav)}
.navlinks .btn::after{display:none}
.menu-btn{display:none;background:none;border:1px solid var(--border);border-radius:var(--r-sm);color:var(--text);font-family:var(--mono);font-size:1.1rem;padding:6px 12px;cursor:pointer}

/* ---------- sections ---------- */
main{flex:1}
section{padding:var(--s-section) 0;position:relative}
.divider::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--border) 16%,var(--border) 84%,transparent)}
.section-head{max-width:680px;margin-bottom:42px}
.section-head .sub{margin-top:14px;font-size:1.1rem;max-width:560px;color:var(--text-mid)}
.lead-block{max-width:730px}
.lead-block h2{margin-bottom:22px}
.lead-block p{margin-bottom:18px}

/* ---------- hero terminal / status line ---------- */
.term{font-family:var(--mono);font-size:.92rem;color:var(--text-mid);background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);padding:12px 16px;display:inline-flex;align-items:center;gap:1px;white-space:nowrap;max-width:100%;overflow:hidden;font-variant-ligatures:none}
.term .p{color:var(--lav);margin-right:8px}
.term .tdots{display:inline-flex;gap:6px;margin-right:14px;padding-right:14px;border-right:1px solid var(--border)}
.term .tdots i{width:8px;height:8px;border-radius:50%;display:block}
.term .tdots i:nth-child(1){background:var(--red)}
.term .tdots i:nth-child(2){background:var(--amber)}
.term .tdots i:nth-child(3){background:var(--green)}
.term .spin{color:var(--lav);display:inline-block;width:1.2ch;margin-right:10px}
.term .phrase{display:inline-block;transition:opacity .2s var(--ease-out),transform .2s var(--ease-out)}
.term .phrase.out{opacity:0;transform:translateY(-4px)}
.cursor{display:inline-block;width:8px;height:1.05em;background:var(--lav);margin-left:6px;transform:translateY(2px);animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* ---------- post cards (research, home, mako build log) ---------- */
.pcard{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);padding:26px 28px;transition:border-color var(--d-base),transform var(--d-base) var(--ease-out)}
.pcard:hover{border-color:var(--border-hover);transform:translateY(-3px)}
.pcard.hide{display:none}
.pmeta{display:flex;gap:14px;align-items:center;flex-wrap:wrap;font-family:var(--mono);font-size:var(--t-meta);color:var(--text-faint);margin-bottom:12px;font-variant-ligatures:none}
.pmeta .tag{color:var(--lav-soft);letter-spacing:.06em;text-transform:uppercase}
.pmeta .series{border:1px solid var(--border-hover);border-radius:var(--r-pill);padding:3px 10px;color:var(--text-dim)}
.pcard h3{color:var(--text);margin-bottom:10px;line-height:1.3}
.pcard h3 a:hover{color:var(--lav)}
.pcard p{font-size:var(--t-small);margin-bottom:18px}
.pcard .link{font-family:var(--mono);font-size:.82rem;color:var(--lav)}

/* ---------- shared content blocks ---------- */
.note{margin-top:22px;padding:16px 20px;background:var(--panel);border:1px solid var(--border);border-left:2px solid var(--lav);border-radius:var(--r-md);font-size:var(--t-small);color:var(--text-dim)}
.note a{color:var(--lav);text-decoration:underline;text-underline-offset:3px}
.ticks{list-style:none;display:flex;flex-direction:column;gap:11px}
.ticks li{position:relative;padding-left:26px;color:var(--text-dim);font-size:1.02rem}
.ticks li::before{content:"";position:absolute;left:0;top:.62em;width:9px;height:9px;border-radius:var(--r-xs);border:1px solid var(--lav);background:var(--lav-12)}
.ticks a{color:var(--lav);text-decoration:underline;text-underline-offset:3px}
.faq{max-width:760px;margin:0 auto}
.faq details{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--panel);margin-bottom:12px}
.faq summary{cursor:pointer;list-style:none;padding:18px 22px;font-family:var(--mono);font-size:1rem;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:16px;font-variant-ligatures:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--lav);font-size:1.25rem;line-height:1;transition:transform var(--d-base) var(--ease-out)}
.faq details[open] summary::after{content:"\2013"}
.faq details p{padding:0 22px 20px;margin:0;font-size:1rem;color:var(--text-dim)}
.faq a{color:var(--lav);text-decoration:underline;text-underline-offset:3px}
.empty{max-width:640px;margin:46px auto 0;text-align:center;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-xl);padding:50px 40px}
.empty h2,.empty h3{font-size:1.4rem;margin-bottom:14px;color:var(--text)}
.empty p{margin-bottom:24px}
.empty .cta-row{justify-content:center}

/* ---------- closing CTA band ---------- */
.foot-cta{text-align:center;overflow:hidden}
.foot-cta::after{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background:radial-gradient(46% 62% at 50% 52%,rgba(185,175,232,.056),transparent 72%)}
.foot-cta .wrap{position:relative;z-index:1}
.foot-cta .foot-lead{font-family:var(--mono);font-size:1rem;color:var(--lav-soft);margin:0 auto 12px}
.foot-cta h2{margin-bottom:22px}
.foot-cta p,.foot-cta .closing-sub{max-width:520px;margin:0 auto 24px;font-size:1.1rem;color:var(--text-mid)}
.foot-cta .cta-row{justify-content:center}
.foot-cta .meta{font-family:var(--mono);font-size:.82rem;color:var(--text-faint);margin-top:26px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--border);padding:34px 0}
.foot-bar{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:var(--mono);font-size:.78rem;color:var(--text-faint)}
.foot-links{display:flex;gap:18px;flex-wrap:wrap}
.foot-links a{color:var(--text-dim);transition:color var(--d-base)}
.foot-links a:hover{color:var(--lav)}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity var(--d-slow) var(--ease-out),transform var(--d-slow) var(--ease-out)}
.reveal.in{opacity:1;transform:none}
/* stagger siblings that reveal together; capped so a 6-card grid finishes in ~.3s */
.reveal:nth-child(2){transition-delay:.05s}
.reveal:nth-child(3){transition-delay:.1s}
.reveal:nth-child(4){transition-delay:.15s}
.reveal:nth-child(5){transition-delay:.2s}
.reveal:nth-child(n+6){transition-delay:.25s}

/* Cross-document page transition: a short crossfade between pages, the
   sticky header held in place. Firefox ignores it and just navigates. */
@view-transition{navigation:auto}
::view-transition-old(root),::view-transition-new(root){animation-duration:.18s;animation-timing-function:var(--ease-out)}
::view-transition-old(site-header),::view-transition-new(site-header){animation:none}

/* ---------- mobile ---------- */
@media (max-width:860px){
  .navlinks{position:absolute;top:68px;left:0;right:0;background:var(--bg-soft);border-bottom:1px solid var(--border);flex-direction:column;gap:0;padding:8px 0;display:none;overscroll-behavior:contain}
  .navlinks.open{display:flex}
  .navlinks a.nl{padding:12px 24px;width:100%}
  .navlinks a.nl::after{display:none}
  .navlinks .btn{margin:10px 24px}
  .menu-btn{display:block}
  .pcard{padding:24px 22px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .reveal,.hero .inner>*{opacity:1;transform:none}
  @view-transition{navigation:none}
}

/* ---------- "on this page" index (toc.js) ---------- */
[id]{scroll-margin-top:84px}
.toc{position:fixed;top:104px;left:calc(50% + var(--maxw)/2 - var(--s-gutter) - 212px);width:212px;display:none;flex-direction:column;z-index:5;opacity:0;transform:translateY(6px);transition:opacity .3s var(--ease-out),transform .3s var(--ease-out);pointer-events:none}
.toc.show{opacity:1;transform:none;pointer-events:auto}
.toc-h{font-family:var(--mono);font-size:var(--t-meta);letter-spacing:.2em;text-transform:uppercase;color:var(--text-faint);margin-bottom:10px;padding-left:14px}
.toc a{font-family:var(--mono);font-size:.76rem;color:var(--text-faint);padding:6px 0 6px 14px;border-left:1px solid var(--border);transition:color var(--d-base),border-color var(--d-base);line-height:1.35;font-variant-ligatures:none}
.toc a:hover{color:var(--text)}
.toc a.active{color:var(--lav);border-left-color:var(--lav)}
.toc a .n{color:var(--lav-soft);margin-right:8px;opacity:.7;font-variant-numeric:tabular-nums}
@media (min-width:1180px){.toc{display:flex}}

/* ---------- surface variation ---------- */
/* One band per page breaks the card-after-card rhythm. */
.band{background:var(--bg-soft)}
/* FAQ as a ruled list rather than another stack of cards. */
.faq details{border:0;border-top:1px solid var(--border);border-radius:0;background:transparent;margin:0;box-shadow:none}
.faq details:last-child{border-bottom:1px solid var(--border)}
.faq summary{padding:20px 4px}
.faq details p{padding:0 4px 22px}
.faq details[open]{background:linear-gradient(180deg,var(--lav-12),transparent 60px)}