/* ============================================================
   THR Developments — motorsport engine shop
   Art direction: carbon black, THR royal blue + competition orange,
   Saira Condensed display + IBM Plex Sans/Mono (engineering/telemetry)
   ============================================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#0a0b0d;
  --bg-2:#0d0f13;
  --bg-3:#14171e;
  --panel:#14171e;
  --line:rgba(255,255,255,.085);
  --line-2:rgba(255,255,255,.16);
  --ink:#f2f5fb;
  --muted:#98a2b2;
  --dim:#69727f;

  --blue:#2a5fe0;
  --blue-bright:#5e8bff;
  --orange:#f0531e;
  --orange-bright:#ff6f33;

  --chrome:linear-gradient(176deg,#dfeaff 0%,#9fb6e6 42%,#3f63c4 78%,#27407f 100%);

  --disp:'Saira Condensed','Arial Narrow Bold','Arial Narrow',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SFMono-Regular',monospace;
  --sans:'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',sans-serif;

  --maxw:1240px;
  --pad:clamp(20px,5vw,40px);
  --sect:clamp(76px,10vw,148px);
}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:17px;line-height:1.65;
  font-weight:400;letter-spacing:.005em;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--disp);font-weight:800;line-height:.96;letter-spacing:-.01em;text-transform:uppercase}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
.mono{font-family:var(--mono);font-size:.74rem;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}
.accent-orange{color:var(--orange)}
.accent-chrome{
  background:var(--chrome);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--blue-bright);
}

/* shared section title with leading rule */
.section-title{font-size:clamp(2.5rem,5.6vw,5rem);letter-spacing:-.02em}
.section-title{position:relative;padding-top:26px}
.section-title::before{
  content:"";position:absolute;top:0;left:0;width:64px;height:4px;
  background:var(--orange);
}

/* ---- reveal (JS-gated: content stays visible without JS) ---- */
.reveal{transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.js .reveal{opacity:0;transform:translateY(22px)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .reveal,.reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---- buttons ---- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  font-family:var(--disp);font-weight:800;text-transform:uppercase;
  font-size:1.06rem;letter-spacing:.04em;line-height:1;
  padding:17px 30px;border:2px solid transparent;border-radius:3px;
  cursor:pointer;transition:transform .25s ease,background .25s ease,border-color .25s ease,color .25s ease;
  white-space:nowrap;
}
.btn--orange{background:var(--orange);color:#0a0b0d}
.btn--orange:hover{background:var(--orange-bright);transform:translateY(-2px)}
.btn--ghost{border-color:var(--line-2);color:var(--ink)}
.btn--ghost:hover{border-color:var(--blue-bright);background:rgba(94,139,255,.08);transform:translateY(-2px)}
.btn--big{padding:20px 38px;font-size:1.18rem}

/* ---- logo ---- */
.logo{display:inline-flex;flex-direction:column;line-height:1}
.logo__mark{position:relative;display:inline-block}
.logo__thr{
  font-family:var(--disp);font-style:italic;font-weight:900;font-size:30px;
  letter-spacing:-.03em;
  background:var(--chrome);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 1px 0 rgba(0,0,0,.5));
}
.logo__streak{position:absolute;left:-2px;right:-6px;bottom:-3px;width:calc(100% + 10px);height:12px;overflow:visible}
.logo__streak path{fill:none;stroke:var(--orange);stroke-width:2.4;stroke-linecap:round}
.logo__streak path:last-child{stroke:var(--orange-bright);stroke-width:1.4;opacity:.8}
.logo__sub{
  font-family:var(--mono);font-weight:500;font-size:8.5px;letter-spacing:.42em;
  text-transform:uppercase;color:var(--muted);margin-top:5px;padding-left:2px;
}

/* ============ HEADER ============ */
.site-head{
  position:fixed;top:0;left:0;right:0;z-index:60;
  padding:18px 0;transition:background .35s ease,padding .35s ease,border-color .35s ease;
  border-bottom:1px solid transparent;
}
.site-head.scrolled{
  background:rgba(8,9,11,.86);backdrop-filter:blur(12px);
  border-bottom-color:var(--line);padding:12px 0;
}
.site-head__inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.nav{display:flex;align-items:center;gap:34px}
.nav a{
  font-family:var(--mono);font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);transition:color .2s ease;position:relative;padding:4px 0;
}
.nav a:hover{color:var(--ink)}
.nav a:not(.nav__call)::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--orange);transition:width .25s ease;
}
.nav a:not(.nav__call):hover::after{width:100%}
.nav__call{
  color:var(--ink) !important;border:1.5px solid var(--line-2);
  padding:9px 16px !important;border-radius:3px;font-weight:600;
}
.nav__call:hover{border-color:var(--orange);color:var(--orange) !important}

.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;z-index:70}
.burger span{display:block;width:26px;height:2.5px;background:var(--ink);transition:transform .3s ease,opacity .3s ease}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ============ HERO ============ */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden}
.hero__media{position:absolute;inset:0;z-index:0}
.hero__media img{width:100%;height:100%;object-fit:cover;object-position:60% 50%;transform:scale(1.06);will-change:transform}
.hero__scrim{
  position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(90deg,rgba(8,9,11,.94) 0%,rgba(8,9,11,.72) 38%,rgba(8,9,11,.18) 70%,rgba(8,9,11,.45) 100%),
    linear-gradient(0deg,rgba(8,9,11,.96) 2%,rgba(8,9,11,0) 42%);
}
.hero__inner{position:relative;z-index:2;padding-top:160px;padding-bottom:clamp(40px,7vw,90px);max-width:880px}
.hero__eyebrow{
  font-family:var(--mono);font-size:.8rem;letter-spacing:.28em;text-transform:uppercase;
  color:var(--blue-bright);display:flex;align-items:center;gap:14px;margin-bottom:22px;
}
.hero__eyebrow::before{content:"";width:42px;height:3px;background:var(--orange)}
.hero__title{
  font-size:clamp(3.2rem,9.2vw,8.4rem);line-height:.9;letter-spacing:-.025em;
  text-shadow:0 4px 40px rgba(0,0,0,.5);
}
.hero__lead{
  font-size:clamp(1.05rem,1.7vw,1.4rem);color:#cfd6e2;max-width:540px;margin-top:26px;line-height:1.5;font-weight:400;
}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}

/* telemetry spec bar */
.specbar{
  position:relative;z-index:2;border-top:1px solid var(--line-2);
  background:linear-gradient(0deg,rgba(8,9,11,.92),rgba(8,9,11,.5));backdrop-filter:blur(6px);
}
.specbar__grid{display:grid;grid-template-columns:repeat(4,1fr)}
.specbar__cell{
  padding:22px var(--pad);display:flex;flex-direction:column;gap:4px;
  border-left:1px solid var(--line);
}
.specbar__cell:first-child{border-left:0;padding-left:0}
.specbar__grid .specbar__cell:first-child{padding-left:0}
.specbar__n{font-family:var(--disp);font-weight:800;font-size:clamp(1.5rem,2.5vw,2.1rem);letter-spacing:-.01em;color:var(--ink)}
.specbar__l{font-family:var(--mono);font-size:.66rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}

/* ============ STATS ============ */
.stats{
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.025) 0 1px,transparent 1px 64px),
    var(--bg);
  border-bottom:1px solid var(--line);
  padding:clamp(54px,7vw,96px) 0;
}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(28px,4vw,56px)}
.stat__num{font-family:var(--disp);font-weight:900;font-size:clamp(2.8rem,5.4vw,4.8rem);line-height:1;letter-spacing:-.02em;display:flex;align-items:baseline;gap:.12em}
.stat__num i{font-style:normal;font-size:.4em;font-weight:800;color:var(--orange)}
.stat__lab{font-size:.95rem;color:var(--muted);margin-top:14px;line-height:1.45;max-width:230px}

/* ============ INTRO ============ */
.intro{padding:var(--sect) 0;position:relative}
.intro__grid{display:grid;grid-template-columns:48px 1fr;gap:0 clamp(28px,5vw,64px)}
.vlabel{
  grid-row:1 / span 2;writing-mode:vertical-rl;transform:rotate(180deg);
  font-family:var(--mono);font-size:.72rem;letter-spacing:.34em;text-transform:uppercase;
  color:var(--dim);justify-self:start;align-self:start;white-space:nowrap;
  border-left:2px solid var(--orange);padding-left:14px;
}
.intro__head h2{font-size:clamp(2.3rem,5vw,4.2rem);max-width:14ch}
.intro__sub{font-size:clamp(1.15rem,1.9vw,1.6rem);color:#d5dbe6;margin-top:26px;max-width:46ch;line-height:1.45;font-weight:400}
.intro__body{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-top:54px;max-width:880px}
.intro__body p{color:var(--muted);font-size:1.02rem}

/* ============ CAPABILITIES ============ */
.caps{padding:var(--sect) 0 0;background:var(--bg-2);border-top:1px solid var(--line)}
.caps__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:clamp(40px,5vw,72px)}
.caps__intro{font-family:var(--mono);font-size:.82rem;letter-spacing:.06em;color:var(--muted);max-width:34ch;text-transform:none;line-height:1.7}
.caps__layout{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(32px,5vw,72px);align-items:start}

.caps__list{list-style:none}
.cap{display:grid;grid-template-columns:74px 1fr;gap:18px;align-items:start;padding:26px 8px 26px 0;border-top:1px solid var(--line);transition:padding .3s ease,background .3s ease}
.cap:last-child{border-bottom:1px solid var(--line)}
.cap__no{font-family:var(--mono);font-weight:600;font-size:1.05rem;color:var(--dim);padding-top:7px;transition:color .3s ease}
.cap h3{font-size:1.7rem;letter-spacing:-.005em;transition:transform .3s ease}
.cap p{color:var(--muted);font-size:.98rem;margin-top:7px;max-width:46ch}
.cap:hover{padding-left:14px;background:linear-gradient(90deg,rgba(94,139,255,.06),transparent 80%)}
.cap:hover .cap__no{color:var(--orange)}
.cap:hover h3{transform:translateX(2px)}

.caps__media{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.caps__fig{position:relative;border:1px solid var(--line);border-radius:5px;overflow:hidden;background:#000}
.caps__fig img{width:100%;aspect-ratio:4/3;object-fit:cover}
.caps__fig figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:34px 16px 12px;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.04em;color:#dfe5ef;
  background:linear-gradient(0deg,rgba(8,9,11,.92),transparent);
}
.caps__fig figcaption span{color:var(--orange);margin-right:8px;font-weight:600}

/* full-bleed detail band */
.detailband{position:relative;margin-top:clamp(56px,7vw,110px);height:clamp(280px,42vw,560px);overflow:hidden;border-top:1px solid var(--line)}
.detailband img{width:100%;height:100%;object-fit:cover;object-position:50% 42%}
.detailband figcaption{
  position:absolute;left:0;bottom:0;right:0;padding:60px var(--pad) 28px;
  max-width:var(--maxw);margin-inline:auto;
  font-family:var(--mono);font-size:.82rem;letter-spacing:.04em;color:#eaeef5;
  background:linear-gradient(0deg,rgba(8,9,11,.9),transparent);
}
.detailband figcaption .mono{color:var(--orange);margin-right:12px;font-weight:600}

/* ============ RACING ============ */
.racing{position:relative;min-height:clamp(520px,72vh,760px);display:flex;align-items:center;overflow:hidden}
.racing__media{position:absolute;inset:0;z-index:0}
.racing__media img{width:100%;height:100%;object-fit:cover;object-position:55% 50%}
.racing::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(90deg,rgba(8,9,11,.95) 0%,rgba(8,9,11,.78) 40%,rgba(8,9,11,.25) 100%);
}
.racing__inner{position:relative;z-index:2;max-width:660px;padding:80px 0}
.racing__tag{color:var(--blue-bright);margin-bottom:18px}
.racing__title{font-size:clamp(3rem,7vw,6.4rem);line-height:.9;letter-spacing:-.02em}
.racing__copy{font-size:clamp(1.05rem,1.6vw,1.32rem);color:#d5dbe6;margin-top:24px;max-width:50ch;line-height:1.55}

/* ============ RESTORATION ============ */
.resto{padding:var(--sect) 0;background:var(--bg);border-top:1px solid var(--line)}
.resto__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,80px);align-items:center}
.resto__img{position:relative;background:#000;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.resto__img::after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 120px rgba(0,0,0,.6);pointer-events:none}
.resto__img img{width:100%;aspect-ratio:1/1;object-fit:cover}
.resto__txt h2{margin-bottom:24px}
.resto__txt p{color:var(--muted);font-size:1.05rem;margin-bottom:18px;max-width:48ch}
.resto__note{color:var(--ink);font-weight:500}
.resto__txt .btn{margin-top:14px}

/* ============ DIRECTOR ============ */
.director{
  padding:var(--sect) 0;text-align:center;
  background:
    radial-gradient(120% 80% at 50% -10%,rgba(42,95,224,.1),transparent 60%),
    var(--bg-2);
  border-top:1px solid var(--line);
}
.director__inner{max-width:900px;margin-inline:auto}
.director__tag{color:var(--muted);margin-bottom:28px}
.director__quote{
  font-family:var(--disp);font-weight:700;text-transform:none;
  font-size:clamp(1.9rem,4.2vw,3.5rem);line-height:1.08;letter-spacing:-.01em;color:var(--ink);
}
.director__body{color:var(--muted);font-size:1.08rem;margin-top:30px;max-width:60ch;margin-inline:auto}

/* ============ CONTACT ============ */
.contact{padding:var(--sect) 0;background:var(--bg);border-top:1px solid var(--line)}
.contact__grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,5vw,72px);align-items:stretch}
.contact__lead{color:var(--muted);font-size:1.08rem;margin:22px 0 36px;max-width:44ch}
.contact__details{display:grid;grid-template-columns:1fr 1fr;gap:28px 32px;margin-bottom:38px}
.contact__details dt{font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--dim);margin-bottom:7px}
.contact__details dd{font-size:1.05rem;color:var(--ink);line-height:1.45}
.contact__details a:hover{color:var(--orange)}

.contact__map{position:relative;border:1px solid var(--line-2);border-radius:6px;overflow:hidden;min-height:440px;display:flex;flex-direction:column}
.contact__map iframe{width:100%;flex:1;border:0;min-height:400px;filter:grayscale(.3) contrast(1.05)}
.contact__maplink{
  display:block;text-align:center;padding:14px;font-family:var(--mono);font-size:.74rem;
  letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
  background:var(--bg-3);border-top:1px solid var(--line);transition:color .2s ease,background .2s ease;
}
.contact__maplink:hover{color:var(--orange);background:#181b22}

/* ============ FOOTER ============ */
.site-foot{background:var(--bg-2);border-top:1px solid var(--line-2);padding-top:clamp(56px,7vw,84px)}
.site-foot__inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:48px}
.logo--foot .logo__thr{font-size:26px}
.site-foot__tag{color:var(--muted);font-size:.96rem;margin-top:18px;max-width:30ch}
.site-foot__col h4{font-family:var(--mono);font-weight:600;font-size:.72rem;letter-spacing:.2em;color:var(--dim);margin-bottom:16px;text-transform:uppercase}
.site-foot__col p{color:var(--muted);font-size:.98rem;margin-bottom:10px;line-height:1.5}
.site-foot__col a:hover{color:var(--orange)}
.social{display:inline-flex;align-items:center;gap:9px;margin-top:8px;color:var(--muted);transition:color .2s ease}
.social svg{width:22px;height:22px;fill:currentColor}
.social:hover{color:var(--blue-bright)}
.social span{font-family:var(--mono);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase}

.site-foot__base{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:24px;padding-bottom:30px}
.site-foot__base p{font-family:var(--mono);font-size:.74rem;letter-spacing:.06em;color:var(--dim)}
.jtn-credit a{color:var(--muted);border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease}
.jtn-credit a:hover{color:var(--orange);border-bottom-color:var(--orange)}

/* ============ RESPONSIVE ============ */
@media (max-width:980px){
  .caps__layout{grid-template-columns:1fr}
  .caps__media{position:static;flex-direction:row;flex-wrap:wrap}
  .caps__fig{flex:1 1 280px}
  .resto__grid{grid-template-columns:1fr;gap:36px}
  .resto__img{max-width:480px}
  .contact__grid{grid-template-columns:1fr}
  .site-foot__inner{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav{
    position:fixed;inset:0 0 0 auto;width:min(82vw,340px);
    flex-direction:column;align-items:flex-start;justify-content:center;gap:26px;
    background:#0c0e12;border-left:1px solid var(--line-2);padding:40px;
    transform:translateX(100%);transition:transform .4s cubic-bezier(.2,.7,.2,1);
  }
  .nav.open{transform:none;box-shadow:-30px 0 80px rgba(0,0,0,.6)}
  .nav a{font-size:1.05rem}
  .nav__call{font-size:1rem !important}
  .burger{display:flex}
  .hero__inner{padding-top:130px}
  .specbar__grid{grid-template-columns:1fr 1fr}
  .specbar__cell:nth-child(2){border-left:0}
  .specbar__cell{padding-left:0 !important;padding-block:16px}
  .specbar__cell:nth-child(odd){padding-left:0}
  .specbar__cell:nth-child(even){padding-left:var(--pad) !important;border-left:1px solid var(--line)}
  .stats__grid{grid-template-columns:1fr 1fr;gap:32px 24px}
  .intro__grid{grid-template-columns:1fr}
  .vlabel{display:none}
  .intro__body{grid-template-columns:1fr;gap:18px;margin-top:36px}
  .contact__details{grid-template-columns:1fr}
  .site-foot__inner{grid-template-columns:1fr}
}
@media (max-width:420px){
  body{font-size:16px}
  .hero__cta{flex-direction:column;align-items:stretch}
  .hero__cta .btn{justify-content:center}
  .stats__grid{grid-template-columns:1fr}
}