/* ============================================================
   Asymptoticsolutions — production site stylesheet
   Self-contained (tokens inlined) so the site deploys as a
   static folder with no build step and no design-system runtime.
   Mirrors the design-system tokens 1:1.
   ============================================================ */

:root {
  /* neutrals */
  --ink-950:#0B0E13; --ink-900:#11151B; --ink-800:#1B2027; --ink-700:#2A2F38;
  --ink-600:#444B55; --ink-500:#646C77; --ink-400:#8B929C; --ink-300:#B9BFC7;
  --ink-200:#DCE0E5; --ink-150:#E7EAEE; --ink-100:#F0F2F5; --ink-50:#F6F8FA;
  --white:#FFFFFF;
  /* accent — mint */
  --accent-50:rgba(95,227,192,.12); --accent-100:rgba(95,227,192,.30); --accent-300:#46C2A4;
  --accent-500:#5FE3C0; --accent-600:#6FE8C8; --accent-700:#97F0D9;
  --positive-500:#5FE3C0; --critical-500:#FF8A7A;

  /* semantic — dark */
  --text-strong:#EEF2F0; --text-body:#C7CEDA; --text-muted:#7F899E;
  --text-faint:#5B6577; --surface-page:#0A0E16; --surface-alt:#0D1320;
  --surface-card:rgba(16,23,36,.6); --surface-sunken:#0C1019; --surface-inverse:#070A11;
  --border-default:rgba(238,242,240,.14); --border-hairline:rgba(238,242,240,.08); --border-strong:rgba(238,242,240,.24);
  --curve-line:var(--accent-500); --curve-axis:rgba(238,242,240,.18);

  /* type */
  --font-sans:"Newsreader",Georgia,"Times New Roman",serif;
  --font-mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --fs-display:clamp(2.75rem, 1.5rem + 4.8vw, 4.75rem);
  --fs-h1:clamp(2.25rem, 1.5rem + 2.6vw, 3.25rem);
  --fs-h2:clamp(1.75rem, 1.3rem + 1.7vw, 2.4rem);
  --fs-h3:1.375rem; --fs-h4:1.125rem;
  --fs-lead:clamp(1.125rem, 1rem + 0.55vw, 1.4rem);
  --fs-body-lg:1.0625rem; --fs-body:1rem; --fs-sm:0.9375rem; --fs-xs:0.8125rem; --fs-eyebrow:0.75rem;

  /* space */
  --space-1:.25rem; --space-2:.5rem; --space-3:.75rem; --space-4:1rem; --space-5:1.5rem;
  --space-6:2rem; --space-7:2.5rem; --space-8:3rem; --space-9:4rem; --space-10:5rem;
  --space-11:6rem; --space-12:8rem;
  --radius-sm:5px; --radius-md:8px; --radius-lg:12px; --radius-pill:999px;
  --shadow-sm:0 1px 3px rgba(11,14,19,.06),0 1px 2px rgba(11,14,19,.04);
  --shadow-md:0 4px 14px rgba(11,14,19,.08),0 1px 3px rgba(11,14,19,.05);
  --shadow-lg:0 14px 40px rgba(11,14,19,.12),0 2px 8px rgba(11,14,19,.06);
  --ease-out:cubic-bezier(.22,.61,.36,1);
  --container:1200px; --pad:clamp(1.25rem,5vw,4rem); --section:clamp(4.5rem,9vw,8.5rem);
}

/* ---------- reset / base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;position:relative;font-family:var(--font-sans);font-size:var(--fs-body);line-height:1.62;
  color:var(--text-body);background:var(--surface-page);-webkit-font-smoothing:antialiased;font-optical-sizing:auto;text-rendering:optimizeLegibility}
h1,h2,h3,h4{margin:0;font-family:var(--font-sans);color:var(--text-strong);line-height:1.08;
  letter-spacing:-0.02em;font-weight:500;font-optical-sizing:auto;text-wrap:balance}
p{margin:0;text-wrap:pretty}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font:inherit}
:focus-visible{outline:3px solid color-mix(in srgb,var(--accent-500) 45%,transparent);outline-offset:2px;border-radius:4px}

/* ---------- helpers ---------- */
.wrap{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--pad)}
.section{padding-block:var(--section)}
.section--alt{background:var(--surface-alt)}
.section--ink{position:relative;background:var(--surface-inverse);color:var(--ink-300);overflow:hidden;isolation:isolate}
.section--ink::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(55% 65% at 85% 8%,color-mix(in srgb,var(--accent-500) 26%,transparent),transparent 70%),
    radial-gradient(50% 60% at 6% 96%,color-mix(in srgb,var(--accent-700) 30%,transparent),transparent 72%)}
.eyebrow{display:inline-flex;align-items:center;gap:.7em;font-family:var(--font-mono);
  font-size:var(--fs-eyebrow);letter-spacing:.14em;text-transform:uppercase;font-weight:500;color:var(--text-muted)}
.eyebrow .no{color:var(--accent-500)}
.eyebrow .rule{width:30px;height:1px;background:var(--border-strong)}
.eyebrow--accent{color:var(--accent-500)}
.hero .eyebrow--accent{padding:.5em .9em;border-radius:var(--radius-pill);background:color-mix(in srgb,var(--accent-500) 9%,transparent);border:1px solid color-mix(in srgb,var(--accent-500) 18%,transparent);color:var(--accent-700)}
.section--ink .eyebrow{color:var(--ink-400)}
.section--ink .eyebrow--accent{color:var(--accent-300)}
.sec-head{max-width:760px;margin-bottom:var(--space-9)}
.sec-head h2{font-size:var(--fs-h2);margin-top:var(--space-4)}
.section--ink .sec-head h2{color:var(--white)}
.sec-head .lead{font-size:var(--fs-lead);line-height:1.5;color:var(--text-muted);margin-top:var(--space-4);max-width:60ch}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease-out),transform .6s var(--ease-out)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .curve-path{stroke-dasharray:none!important;stroke-dashoffset:0!important}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55em;height:48px;padding:0 1.4em;
  font-family:var(--font-sans);font-weight:600;font-size:var(--fs-sm);letter-spacing:-0.005em;
  border:1px solid transparent;border-radius:10px;cursor:pointer;white-space:nowrap;
  transition:background .14s var(--ease-out),color .14s var(--ease-out),border-color .14s var(--ease-out),transform .18s var(--ease-out),box-shadow .18s var(--ease-out)}
.btn:active{transform:translateY(1px)}
.btn svg{width:1.05em;height:1.05em}
.btn--primary{background:var(--accent-500);color:#06130F;box-shadow:0 0 0 1px rgba(95,227,192,.4),0 8px 26px -10px rgba(95,227,192,.6)}
.btn--primary:hover{background:var(--accent-600);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(95,227,192,.55),0 14px 34px -10px rgba(95,227,192,.7)}
.btn--secondary{background:transparent;color:var(--text-strong);border-color:var(--border-strong)}
.btn--secondary:hover{background:var(--surface-sunken)}
.btn--inverse{background:var(--accent-500);color:#06130F}
.btn--inverse:hover{background:var(--accent-600)}
.btn--sm{height:40px;font-size:var(--fs-xs);padding:0 1.15em;border-radius:8px}
.btn--primary.btn--sm{box-shadow:0 0 0 1px rgba(95,227,192,.35),0 6px 16px -8px rgba(95,227,192,.55)}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:60;
  background:color-mix(in srgb,var(--surface-page) 85%,transparent);
  backdrop-filter:saturate(150%) blur(12px);-webkit-backdrop-filter:saturate(150%) blur(12px);
  border-bottom:1px solid var(--border-hairline)}
.nav__in{display:flex;align-items:center;gap:var(--space-6);height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:17px;letter-spacing:-0.02em;color:var(--text-strong)}
.brand .mark{width:26px;height:26px;color:var(--accent-500)}
/* wordmark: "Asymptotic" bold, "solutions" regular, for legibility */
.wm{font-weight:400}.wm b{font-weight:700}
.nav__links{display:flex;gap:var(--space-5);margin-left:auto}
.nav__links a{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);position:relative;padding:6px 0}
.nav__links a:hover{color:var(--text-strong)}
.nav__links a.active{color:var(--text-strong)}
.nav__links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--accent-500)}
.nav__cta{margin-left:var(--space-2)}
.burger{display:none;margin-left:auto;width:44px;height:44px;align-items:center;justify-content:center;
  background:none;border:1px solid var(--border-default);border-radius:var(--radius-sm);cursor:pointer;color:var(--text-strong)}
.mobile{display:none;position:fixed;inset:68px 0 auto 0;z-index:55;background:var(--surface-page);
  border-bottom:1px solid var(--border-hairline);padding:var(--space-4) var(--pad) var(--space-6);box-shadow:var(--shadow-md)}
.mobile.open{display:block}
.mobile a{display:block;font-family:var(--font-mono);font-size:14px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--text-body);padding:14px 0;border-bottom:1px solid var(--border-hairline)}
.mobile .btn{margin-top:var(--space-5);width:100%}

/* ---------- hero ---------- */
.hero{position:relative;padding-block:clamp(3.5rem,7vw,6.5rem) clamp(3rem,6vw,5.5rem);overflow:hidden;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(46% 56% at 72% 26%,rgba(95,227,192,.18),transparent 60%),
    radial-gradient(52% 60% at 6% 90%,rgba(95,227,192,.06),transparent 70%)}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(238,242,240,.07) .5px,transparent .5px),
    linear-gradient(90deg,rgba(238,242,240,.07) .5px,transparent .5px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(120% 95% at 68% 34%,#000 35%,transparent 78%);
  mask-image:radial-gradient(120% 95% at 68% 34%,#000 35%,transparent 78%)}
.hero__grid{display:grid;grid-template-columns:1.12fr .88fr;gap:clamp(2rem,5vw,5rem);align-items:center}
.hero h1{font-size:var(--fs-display);font-weight:500;letter-spacing:-0.022em;line-height:1.04;margin-top:var(--space-5)}
.hero h1 em{font-style:italic;color:var(--accent-500)}
.hero .sub{font-size:var(--fs-lead);line-height:1.5;color:var(--text-muted);margin:var(--space-6) 0 var(--space-7);max-width:52ch}
.hero__cta{display:flex;gap:var(--space-3);flex-wrap:wrap}
.hero__stats{display:flex;gap:var(--space-8);margin-top:var(--space-9);flex-wrap:wrap}
.stat b{display:block;font-size:24px;font-weight:600;color:var(--text-strong);letter-spacing:-0.01em;line-height:1}
.stat span{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-faint);margin-top:6px;display:block}
.hero__art{position:relative}
.hero__art .cap{font-family:var(--font-mono);font-size:11px;color:var(--text-faint);letter-spacing:.04em;margin-top:var(--space-3)}
.curve-path{stroke-dasharray:1;stroke-dashoffset:1;filter:drop-shadow(0 0 6px rgba(95,227,192,.5));animation:draw 1.9s var(--ease-out) .25s forwards}
@keyframes draw{to{stroke-dashoffset:0}}

/* ---------- grids & cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-5)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-5)}
.card{display:flex;flex-direction:column;background:var(--surface-card);border:1px solid var(--border-hairline);
  border-radius:16px;padding:var(--space-6);transition:border-color .2s var(--ease-out),box-shadow .25s var(--ease-out),transform .25s var(--ease-out)}
.card--accent{position:relative;overflow:hidden}
.card--accent::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent-500),var(--accent-300))}
.card--hover:hover{border-color:color-mix(in srgb,var(--accent-500) 30%,var(--border-default));box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.card .idx{font-family:var(--font-mono);font-size:var(--fs-eyebrow);letter-spacing:.14em;color:var(--accent-500);margin-bottom:var(--space-4)}
.card h3{font-size:var(--fs-h3);font-weight:600;letter-spacing:-0.01em;margin-bottom:var(--space-3)}
.card p{font-size:var(--fs-body);line-height:1.6;color:var(--text-muted)}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:var(--space-5)}
.tag{font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.04em;
  padding:.36em .8em;border-radius:var(--radius-pill);background:var(--surface-sunken);color:var(--text-muted);border:1px solid var(--border-hairline)}
.tag--accent{background:var(--accent-50);color:var(--accent-700);border-color:var(--accent-100)}
.tag--outline{background:transparent;color:var(--text-body);border-color:var(--border-strong)}

/* principles */
.principles{display:grid;grid-template-columns:1fr 1fr;gap:0 var(--space-9)}
.principle{display:flex;gap:var(--space-4);padding:var(--space-5) 0;border-top:1px solid color-mix(in srgb,var(--white) 13%,transparent)}
.principle .pno{font-family:var(--font-mono);font-size:12px;color:var(--accent-300);width:34px;flex:none;padding-top:3px}
.principle h3{font-size:var(--fs-h4);font-weight:600;color:var(--white);margin-bottom:6px;letter-spacing:-0.005em}
.principle p{font-size:var(--fs-sm);line-height:1.5;color:var(--ink-300)}

/* work */
.work .whead{display:flex;align-items:baseline;justify-content:space-between;gap:var(--space-4);margin-bottom:var(--space-3)}
.work h3{font-size:var(--fs-h3);font-weight:600;letter-spacing:-0.01em}
.work .role{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);letter-spacing:.04em;white-space:nowrap}
.work p{font-size:var(--fs-body);line-height:1.6;color:var(--text-muted)}
.wlink{display:inline-flex;align-items:center;gap:6px;margin-top:var(--space-4);font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--accent-600);text-decoration:none;transition:gap .2s var(--ease-out),color .2s var(--ease-out)}
.wlink svg{width:13px;height:13px}
.wlink:hover{color:var(--accent-700);gap:9px}

/* track record */
.track{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(2rem,5vw,5rem);align-items:start}
.track .logos{display:flex;flex-wrap:wrap;gap:8px;margin-top:var(--space-5)}
.roles{display:flex;flex-direction:column}
.role{display:flex;gap:var(--space-4);padding:var(--space-4) 0;border-top:1px solid var(--border-hairline)}
.role:first-child{border-top:0;padding-top:0}
.role .rk{flex:none;width:54px;font-family:var(--font-mono);font-size:11px;color:var(--text-faint);letter-spacing:.04em;padding-top:4px}
.role b{font-size:var(--fs-body-lg);font-weight:600;color:var(--text-strong);display:block}
.role span{font-family:var(--font-mono);font-size:11px;color:var(--text-faint);letter-spacing:.04em}

/* capabilities */
.caps{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:var(--space-6) var(--space-7)}
.cap{border-top:2px solid var(--border-default);padding-top:var(--space-4)}
.cap .k{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-600);margin-bottom:var(--space-3)}
.cap .v{font-size:var(--fs-sm);line-height:1.5;color:var(--text-body)}

/* about */
.about{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(2rem,5vw,5rem);align-items:start;margin-top:var(--space-6)}
.facts{display:flex;flex-direction:column}
.fact{display:flex;flex-direction:column;gap:4px;padding:var(--space-4) 0;border-bottom:1px solid var(--border-hairline)}
.fact:first-child{padding-top:0}
.fact b{font-size:var(--fs-h3);font-weight:600;letter-spacing:-0.01em;color:var(--text-strong)}
.fact span{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--text-faint)}
.about__body p{font-size:var(--fs-body-lg);line-height:1.62;color:var(--text-body);margin-bottom:var(--space-4)}

/* contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,5rem);align-items:start}
.contact h2{font-size:var(--fs-h1);font-weight:600;letter-spacing:-0.02em;color:var(--white);margin-top:var(--space-4);max-width:13ch}
.direct{margin-top:var(--space-6);display:flex;flex-direction:column;gap:var(--space-3)}
.direct a{font-family:var(--font-mono);font-size:14px;color:var(--ink-200);display:inline-flex;align-items:center;gap:10px}
.direct a:hover{color:var(--white)}
.direct svg{width:16px;height:16px;flex:none}
.form{display:grid;gap:var(--space-4)}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-300)}
.field label .req{color:var(--accent-300);margin-left:.3em}
.field input,.field textarea{font-family:var(--font-sans);font-size:var(--fs-body);color:var(--white);
  background:color-mix(in srgb,var(--white) 6%,transparent);border:1px solid color-mix(in srgb,var(--white) 16%,transparent);
  border-radius:var(--radius-md);padding:0 .9em;height:48px;width:100%;transition:border-color .14s,box-shadow .14s}
.field textarea{padding:.7em .9em;height:auto;min-height:120px;resize:vertical;line-height:1.5}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-500)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent-300);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent-500) 30%,transparent)}
.field .err{font-family:var(--font-mono);font-size:var(--fs-xs);color:#FF9A8F;display:none}
.field.invalid input,.field.invalid textarea{border-color:#FF9A8F}
.field.invalid .err{display:block}

/* footer */
.footer{border-top:1px solid var(--border-hairline);padding-block:var(--space-7)}
.footer__in{display:flex;align-items:center;justify-content:space-between;gap:var(--space-5);flex-wrap:wrap}
.footer .brand .mark{width:22px;height:22px}
.footer .meta{font-family:var(--font-mono);font-size:11px;color:var(--text-faint);letter-spacing:.04em}

/* toast */
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);opacity:0;
  background:var(--ink-900);color:var(--white);font-size:14px;padding:13px 20px;border-radius:var(--radius-md);
  box-shadow:var(--shadow-lg);z-index:100;pointer-events:none;transition:opacity .3s var(--ease-out),transform .3s var(--ease-out);
  display:inline-flex;align-items:center;gap:10px}
.toast .dot{width:7px;height:7px;border-radius:999px;background:var(--accent-300)}
.toast.show{opacity:1;transform:translateX(-50%)}

/* ---------- responsive ---------- */
@media (max-width:880px){
  .nav__links,.nav__cta{display:none}
  .burger{display:inline-flex}
  .hero__grid{grid-template-columns:1fr}
  .hero__art{order:-1;max-width:440px}
  .grid-3,.grid-2,.principles,.track,.about,.contact{grid-template-columns:1fr}
  .principles{gap:0}
  .hero__stats{gap:var(--space-6)}
}