/* ============================================================
   FiatLux Software shared styles
   Self-hosted fonts (no external requests, GDPR-friendly).
   Variable fonts: one file per subset covers all weights.
   ============================================================ */
@font-face{
  font-family:'Inter';font-style:normal;font-weight:400 600;font-display:swap;
  src:url(../fonts/inter-latin.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Inter';font-style:normal;font-weight:400 600;font-display:swap;
  src:url(../fonts/inter-latin-ext.woff2) format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face{
  font-family:'Space Grotesk';font-style:normal;font-weight:400 700;font-display:swap;
  src:url(../fonts/spacegrotesk-latin.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Space Grotesk';font-style:normal;font-weight:400 700;font-display:swap;
  src:url(../fonts/spacegrotesk-latin-ext.woff2) format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face{
  font-family:'JetBrains Mono';font-style:normal;font-weight:400 700;font-display:swap;
  src:url(../fonts/jetbrainsmono-latin.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'JetBrains Mono';font-style:normal;font-weight:400 700;font-display:swap;
  src:url(../fonts/jetbrainsmono-latin-ext.woff2) format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
html{font-size:clamp(16px, 0.55rem + 0.78vw, 28px);}

:root{
  --graphite:#0D0F12;
  --graphite-2:#111419;
  --panel:#14181E;
  --line:#1C2128;
  --line-2:#262D36;
  --ink:#E8EAED;
  --ink-dim:#9BA3AD;
  --ink-faint:#5C656F;
  --amber:#E5A663;
  --amber-bright:#F0B978;
  --steel:#5B7A99;
  --good:#7FB069;

  --display:'Space Grotesk',sans-serif;
  --body:'Inter',sans-serif;
  --mono:'JetBrains Mono',monospace;

  --maxw:min(90vw, 2100px);
  --gutter:clamp(20px,5vw,80px);
}

/* light theme: warm paper, not a flat invert */
:root[data-theme="light"]{
  --graphite:#F2EEE6;
  --graphite-2:#EBE6DB;
  --panel:#E4DDCE;
  --line:#D8D0BF;
  --line-2:#C9BFA9;
  --ink:#1F1B16;
  --ink-dim:#5C554A;
  --ink-faint:#938A78;
  --amber:#B07A2E;
  --amber-bright:#C8964F;
  --steel:#4A6580;
  --good:#5E8A4A;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--graphite);
  color:var(--ink);
  font-family:var(--body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  transition:background .35s ease,color .35s ease;
}

/* faint instrument grid over the whole page */
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:4rem 4rem;
  opacity:.35;
  pointer-events:none;
  z-index:0;
  -webkit-mask-image:radial-gradient(ellipse 120% 90% at 50% 0%,#000 30%,transparent 80%);
          mask-image:radial-gradient(ellipse 120% 90% at 50% 0%,#000 30%,transparent 80%);
}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);position:relative;z-index:1}

.mono{font-family:var(--mono);font-weight:400}
.eyebrow{
  font-family:var(--mono);
  font-size:0.6875rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--ink-faint);
  display:flex;align-items:center;gap:10px;
}
.eyebrow::before{
  content:"";width:18px;height:1px;background:var(--amber);display:inline-block;
}

/* ---------- top bar ---------- */
.topbar{
  position:relative;z-index:2;
  display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;
  padding:22px var(--gutter);
  border-bottom:1px solid var(--line);
  font-family:var(--mono);
  font-size:0.75rem;
  color:var(--ink-dim);
}
.topbar .mark{color:var(--ink);letter-spacing:.04em;font-weight:500;text-decoration:none}
.topbar .mark b{color:var(--amber);font-weight:700}
.topbar .mark:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
.topbar .right{display:flex;align-items:center;gap:20px}
.topbar .status{display:flex;align-items:center;gap:8px}

/* primary nav */
.nav{display:flex;align-items:center;gap:2px}
.nav a{
  font-family:var(--mono);font-size:0.6875rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-faint);text-decoration:none;padding:8px 12px;border-radius:2px;
  transition:color .2s ease,background .2s ease;position:relative;
}
.nav a:hover{color:var(--ink-dim)}
.nav a[aria-current="page"]{color:var(--amber)}
.nav a[aria-current="page"]::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:1px;background:var(--amber);
}
.nav a:focus-visible{outline:2px solid var(--amber);outline-offset:2px}

.lang{display:flex;border:1px solid var(--line-2);border-radius:2px;overflow:hidden}
.lang button{
  font-family:var(--mono);font-size:0.6875rem;letter-spacing:.1em;
  background:transparent;color:var(--ink-faint);border:none;cursor:pointer;
  padding:6px 11px;transition:background .2s,color .2s;
}
.lang button + button{border-left:1px solid var(--line-2)}
.lang button:hover{color:var(--ink-dim)}
.lang button.active{background:var(--amber);color:var(--graphite);font-weight:700}
.lang button:focus-visible{outline:2px solid var(--amber);outline-offset:2px}

.theme-btn{
  width:30px;height:28px;display:flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line-2);border-radius:2px;
  color:var(--ink-dim);cursor:pointer;font-size:0.875rem;line-height:1;
  transition:color .2s,border-color .2s;
}
.theme-btn:hover{color:var(--amber);border-color:var(--amber)}
.theme-btn:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.theme-glyph{display:block}
.dot{width:7px;height:7px;border-radius:50%;background:var(--good);box-shadow:0 0 10px var(--good);
  animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ---------- hero / datasheet header ---------- */
.hero{padding:clamp(64px,12vh,140px) 0 clamp(56px,9vh,110px)}
.calibration{
  height:1px;width:100%;background:var(--line-2);position:relative;margin:0 0 40px;
  overflow:hidden;
}
.calibration::after{
  content:"";position:absolute;left:0;top:0;height:100%;width:100%;
  background:linear-gradient(90deg,transparent,var(--amber),transparent);
  transform:translateX(-100%);
  animation:sweep 2.2s cubic-bezier(.6,0,.2,1) .2s forwards;
}
@keyframes sweep{to{transform:translateX(100%)}}

h1{
  font-family:var(--display);
  font-weight:600;
  font-size:clamp(2.5rem,8.5vw,7rem);
  line-height:.98;
  letter-spacing:-.02em;
  margin-bottom:8px;
}
h1 .lux{color:var(--amber)}
h1 .sub{display:block;color:var(--ink);font-weight:500;
  font-size:clamp(1.25rem,3.4vw,2.4rem);letter-spacing:-.01em;margin-top:14px}

/* sub-page hero title (smaller than the FiatLux wordmark) */
.page-title{
  font-family:var(--display);font-weight:600;
  font-size:clamp(2.2rem,6vw,4.6rem);line-height:1;letter-spacing:-.02em;margin:16px 0 0;
}
.page-title .lux{color:var(--amber)}
.page-hero .eyebrow{margin-bottom:0}

.lede{
  font-size:clamp(1.06rem,2.1vw,1.45rem);
  color:var(--ink-dim);
  max-width:52ch;
  margin:28px 0 0;
}
.lede b{color:var(--ink);font-weight:600}

/* spec strip beneath hero */
.spec-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line-2);
  margin-top:clamp(40px,7vh,72px);
  background:linear-gradient(180deg,var(--panel),var(--graphite-2));
}
.spec{
  padding:20px 22px;border-right:1px solid var(--line-2);
}
.spec:last-child{border-right:none}
.spec .k{font-family:var(--mono);font-size:0.6562rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-faint);margin-bottom:8px}
.spec .v{font-family:var(--display);font-size:0.9375rem;font-weight:500;color:var(--ink)}
.spec .v.amber{color:var(--amber)}

/* ---------- section scaffolding ---------- */
section{padding:clamp(56px,10vh,104px) 0;border-top:1px solid var(--line);position:relative}
.sec-head{display:flex;align-items:baseline;gap:16px;margin-bottom:clamp(32px,5vh,52px);flex-wrap:wrap}
.sec-no{font-family:var(--mono);font-size:0.75rem;color:var(--amber);letter-spacing:.1em}
.sec-title{font-family:var(--display);font-size:clamp(1.5rem,3.6vw,2.6rem);font-weight:600;letter-spacing:-.01em}

/* capability / offering rows */
.caps{border-top:1px solid var(--line-2)}
.cap{
  display:grid;grid-template-columns:9rem 1fr;gap:1.5rem;
  padding:28px 0;border-bottom:1px solid var(--line-2);
  transition:padding-left .35s ease, background .35s ease;
}
.cap:hover{padding-left:16px;background:linear-gradient(90deg,var(--panel),transparent)}
.cap .label{font-family:var(--mono);font-size:0.75rem;letter-spacing:.06em;color:var(--amber);padding-top:4px}
.cap h3{font-family:var(--display);font-size:clamp(1.19rem,2.4vw,1.6rem);font-weight:600;margin-bottom:8px;letter-spacing:-.01em}
.cap p{color:var(--ink-dim);max-width:60ch;font-size:0.9688rem}

/* inclusions checklist inside an offering row */
.incl{list-style:none;margin-top:14px;display:flex;flex-wrap:wrap;gap:7px 20px;max-width:62ch}
.incl li{font-family:var(--mono);font-size:0.7812rem;letter-spacing:.02em;color:var(--ink-dim);
  display:flex;align-items:center;gap:8px}
.incl li::before{content:"";width:5px;height:5px;background:var(--amber);flex-shrink:0;transform:rotate(45deg)}

/* stack readout */
.stack-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1px;
  background:var(--line-2);border:1px solid var(--line-2)}
.layer{background:var(--graphite-2);padding:24px}
.layer .k{font-family:var(--mono);font-size:0.6562rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-faint);margin-bottom:14px;display:flex;justify-content:space-between}
.layer .k span{color:var(--steel)}
.layer ul{list-style:none}
.layer li{font-family:var(--mono);font-size:0.8438rem;color:var(--ink);padding:5px 0;
  display:flex;align-items:center;gap:9px}
.layer li::before{content:"";width:5px;height:5px;background:var(--amber);flex-shrink:0;
  transform:rotate(45deg)}

/* numbered notes (approach / engagement) */
.notes{display:grid;gap:1px;background:var(--line-2);border:1px solid var(--line-2)}
.note{background:var(--graphite-2);padding:26px 28px;display:grid;grid-template-columns:2.5rem 1fr;gap:18px}
.note .n{font-family:var(--mono);font-size:0.8125rem;color:var(--ink-faint)}
.note h4{font-family:var(--display);font-size:1.0625rem;font-weight:600;margin-bottom:6px}
.note p{color:var(--ink-dim);font-size:0.9375rem;max-width:62ch}

/* prose (About story) */
.prose{max-width:64ch}
.prose p{color:var(--ink-dim);font-size:clamp(1.02rem,1.5vw,1.12rem);margin-bottom:20px}
.prose p:last-child{margin-bottom:0}
.prose b,.prose strong{color:var(--ink);font-weight:600}
.prose .amber{color:var(--amber)}

/* values grid (About) */
.vals{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:1px;
  background:var(--line-2);border:1px solid var(--line-2)}
.val{background:var(--graphite-2);padding:24px 26px;transition:background .35s ease}
.val:hover{background:linear-gradient(180deg,var(--panel),var(--graphite-2))}
.val .n{font-family:var(--mono);font-size:0.75rem;color:var(--amber);letter-spacing:.08em;margin-bottom:12px}
.val h4{font-family:var(--display);font-size:1.0625rem;font-weight:600;margin-bottom:7px;letter-spacing:-.01em}
.val p{color:var(--ink-dim);font-size:0.9062rem}

/* ---------- contact / CTA ---------- */
.contact{text-align:left}
.contact .big{
  font-family:var(--display);font-weight:600;
  font-size:clamp(1.75rem,5.5vw,4rem);line-height:1.05;letter-spacing:-.02em;margin-bottom:24px;
}
.contact .big a{color:var(--amber);text-decoration:none;position:relative;white-space:nowrap}
.contact .big a::after{content:"";position:absolute;left:0;bottom:2px;width:100%;height:2px;
  background:var(--amber);transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.contact .big a:hover::after{transform:scaleX(1)}
.contact p{color:var(--ink-dim);max-width:52ch;font-size:1.0312rem}

/* inline text link */
.tlink{color:var(--amber);text-decoration:none;border-bottom:1px solid transparent;
  transition:border-color .2s ease}
.tlink:hover{border-color:var(--amber)}
.tlink:focus-visible{outline:2px solid var(--amber);outline-offset:3px}

.contact-card{
  margin-top:40px;border:1px solid var(--line-2);
  background:linear-gradient(180deg,var(--panel),var(--graphite-2));
  display:grid;grid-template-columns:1fr 1fr;
}
.field{padding:22px 24px;border-right:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.field:nth-child(2n){border-right:none}
.field .k{font-family:var(--mono);font-size:0.6562rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-faint);margin-bottom:9px}
.field .v{font-family:var(--mono);font-size:0.9062rem;color:var(--ink)}
.field .v a{color:var(--ink);text-decoration:none;border-bottom:1px solid var(--line-2);transition:color .2s,border-color .2s}
.field .v a:hover{color:var(--amber);border-color:var(--amber)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:28px var(--gutter);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  font-family:var(--mono);font-size:0.7188rem;color:var(--ink-faint);position:relative;z-index:1}
footer b{color:var(--ink-dim);font-weight:500}
footer a{color:var(--ink-faint);text-decoration:none;transition:color .2s}
footer a:hover{color:var(--amber)}
.foot-status{display:flex;align-items:center;gap:8px;letter-spacing:.12em;text-transform:uppercase}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

@media (max-width:880px){
  .topbar{justify-content:center}
  .topbar .mark{margin-right:auto}
  .nav{order:3;flex-basis:100%;justify-content:center;border-top:1px solid var(--line);padding-top:12px;margin-top:4px}
}

@media (max-width:680px){
  .spec-strip{grid-template-columns:1fr 1fr}
  .spec:nth-child(2n){border-right:none}
  .spec:nth-child(-n+2){border-bottom:1px solid var(--line-2)}
  .cap{grid-template-columns:1fr;gap:6px}
  .cap:hover{padding-left:0}
  .contact-card{grid-template-columns:1fr}
  .field{border-right:none}
  .nav a{padding:8px 9px;letter-spacing:.1em}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  .calibration::after{display:none}
}