/* ATERA V1, hypercar showpiece. Flat color only, zero gradients. */

:root{
  --carbon:#0B0C0E;
  --carbon-2:#141519;
  --carbon-3:#1B1D22;
  --silver:#C7CCD1;
  --orange:#FF5A1F;
  --off-white:#EDEFF2;
  --line: rgba(199,204,209,0.14);
  --ease: cubic-bezier(0.22,1,0.36,1);
}

.preloader{ position:fixed; inset:0; z-index:9999; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:22px; background:var(--carbon); transition:opacity .5s var(--ease), visibility .5s var(--ease); }
.preloader.is-hidden{ opacity:0; visibility:hidden; pointer-events:none; }
.preloader-mark{ font-family:'Michroma',monospace; font-size:1rem; letter-spacing:0.14em; display:flex; align-items:center; gap:0.6rem; color:var(--off-white); opacity:0; animation:preloaderIn .6s var(--ease) forwards; }
.preloader-mark-sq{ width:9px; height:9px; background:var(--orange); display:inline-block; }
.preloader-bar{ width:120px; height:2px; background:var(--line); overflow:hidden; border-radius:2px; }
.preloader-bar-fill{ display:block; height:100%; width:0%; background:var(--orange); transition:width .25s var(--ease); }
@keyframes preloaderIn{ to{ opacity:1; } }
body.is-preloading{ overflow:hidden; }
@media (prefers-reduced-motion:reduce){ .preloader-mark{ animation:none; opacity:1; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } }

body{
  margin:0;
  background:var(--carbon);
  color:var(--off-white);
  font-family:'Sora', sans-serif;
  font-weight:400;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,.brand,.eyebrow,.section-tag,.spec-value,.meta-num,.beat-num{
  font-family:'Michroma', monospace;
  font-weight:400;
  letter-spacing:0.01em;
}

h2{ font-size:clamp(2rem, 4vw, 3.2rem); line-height:1.15; margin:0 0 1rem; color:var(--off-white); }
h3{ font-size:1.1rem; margin:0 0 0.6rem; color:var(--off-white); }
p{ margin:0; color:var(--silver); }
a{ color:inherit; text-decoration:none; }
img{ display:block; max-width:100%; }

.section-tag{
  font-size:0.72rem;
  letter-spacing:0.22em;
  text-transform:uppercase;
  color:var(--orange);
  display:block;
  margin-bottom:1rem;
}

/* grain overlay: flat tiling data uri, not a gradient */
.grain{
  position:fixed; inset:0; pointer-events:none; z-index:500;
  opacity:0.035; mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* buttons */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:0.95rem 1.9rem; font-family:'Sora',sans-serif; font-weight:600;
  font-size:0.85rem; letter-spacing:0.04em; text-transform:uppercase;
  border-radius:2px; transition:transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
  cursor:pointer;
}
.btn-primary{ background:var(--orange); color:var(--carbon); border:1px solid var(--orange); }
.btn-primary:hover{ background:#ff7a45; transform:translateY(-2px); }
.btn-ghost{ background:transparent; color:var(--off-white); border:1px solid rgba(237,239,242,0.35); }
.btn-ghost:hover{ border-color:var(--off-white); transform:translateY(-2px); }
.btn-large{ padding:1.2rem 2.6rem; font-size:0.95rem; }

/* header */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:200;
  display:flex; align-items:center; justify-content:space-between;
  padding:1.1rem clamp(1.25rem,4vw,3rem);
  background:rgba(11,12,14,0.82);
  border-bottom:1px solid rgba(199,204,209,0.1);
}
.brand{
  font-family:'Michroma',monospace; font-size:1rem; letter-spacing:0.14em;
  display:flex; align-items:center; gap:0.6rem; color:var(--off-white);
}
.brand-mark{ width:9px; height:9px; background:var(--orange); display:inline-block; }
.site-nav{ display:flex; gap:2.1rem; }
.site-nav a{ font-size:0.78rem; letter-spacing:0.05em; text-transform:uppercase; color:var(--silver); transition:color 0.2s var(--ease); }
.site-nav a:hover{ color:var(--orange); }
.nav-cta{
  font-size:0.72rem; letter-spacing:0.06em; text-transform:uppercase;
  padding:0.65rem 1.2rem; border:1px solid rgba(237,239,242,0.35);
  transition:border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-cta:hover{ border-color:var(--orange); color:var(--orange); }
@media (max-width: 860px){
  .site-nav{ display:none; }
}

/* ============ HERO SCRUB ============ */
.scrub-wrap{
  position:relative;
  height:360vh;
}
.scrub-sticky{
  position:sticky; top:0; left:0;
  height:100vh; width:100%;
  overflow:hidden;
  background:var(--carbon);
}
/* hero visual: real spin footage, shown as a floating masked band rather than a
   full-bleed rectangle, so it reads as the car sitting in space rather than on a
   flat studio floor. The radial mask is an alpha fade only (no painted gradient),
   the same exemption already used for the automotive site's bespoke-video-mask. */
.scrub-video-wrap{
  position:absolute; left:50%; top:50%;
  transform:translate(-50%,-52%);
  width:min(1500px, 94vw);
  aspect-ratio:1920/700;
  z-index:2;
  background-size:cover; background-position:center;
  -webkit-mask-image: radial-gradient(ellipse 60% 62% at 50% 50%, #000 0%, #000 52%, transparent 92%);
  mask-image: radial-gradient(ellipse 60% 62% at 50% 50%, #000 0%, #000 52%, transparent 92%);
}
#scrub-canvas{
  position:absolute; inset:0; width:100%; height:100%;
  display:block;
}
@media (max-width:720px){
  .scrub-video-wrap{ width:96vw; transform:translate(-50%,-48%); }
}
.scrub-scrim{
  position:absolute; inset:0;
  background:rgba(11,12,14,0.42);
  z-index:3;
}

.hero-static{
  position:absolute; left:clamp(1.25rem,4vw,3.5rem); bottom:clamp(2rem,6vh,4.5rem);
  max-width:640px; z-index:10;
}
.eyebrow{
  font-size:0.7rem; letter-spacing:0.2em; text-transform:uppercase; color:var(--orange);
  display:block; margin-bottom:1rem;
}
.hero-title{
  font-size:clamp(2.6rem, 7vw, 5.4rem); line-height:1.03; margin:0 0 1.3rem;
  color:var(--off-white);
  text-shadow:0 2px 28px rgba(0,0,0,0.55);
}
.hero-sub{
  font-size:1.02rem; max-width:480px; margin-bottom:1.9rem; color:var(--off-white);
  text-shadow:0 1px 12px rgba(0,0,0,0.6);
}
.hero-actions{ display:flex; gap:1rem; flex-wrap:wrap; }

/* text beats overlay */
.beat{
  position:absolute; right:clamp(1.25rem,4vw,3.5rem); top:50%;
  transform:translateY(-50%) translateX(24px);
  max-width:420px; text-align:right;
  opacity:0; pointer-events:none; z-index:9;
  transition:opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.beat.is-active{ opacity:1; transform:translateY(-50%) translateX(0); }
.beat-num{
  font-size:0.75rem; color:var(--orange); display:block; margin-bottom:0.7rem; letter-spacing:0.1em;
}
.beat h2{ font-size:clamp(1.6rem,3vw,2.4rem); margin-bottom:0.7rem; text-shadow:0 2px 20px rgba(0,0,0,0.6); }
.beat p{ color:var(--off-white); font-size:0.95rem; text-shadow:0 1px 14px rgba(0,0,0,0.6); }
@media (max-width: 720px){
  .beat{ display:none; }
}

/* ============ SPEC BAND ============ */
.spec-band{
  padding:clamp(4rem,10vh,7rem) clamp(1.25rem,4vw,3.5rem);
  background:var(--carbon-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.spec-head{ max-width:640px; margin-bottom:3.5rem; }
.spec-grid{
  display:grid; grid-template-columns:repeat(4,1fr); gap:1px;
  background:var(--line);
}
.spec-cell{
  background:var(--carbon-2);
  padding:2.4rem 1.6rem;
  display:flex; flex-direction:column; gap:0.8rem;
}
.spec-value{
  font-size:clamp(2.1rem,4.6vw,3.6rem); color:var(--off-white); line-height:1;
}
.spec-label{ font-size:0.78rem; color:var(--silver); letter-spacing:0.02em; }
@media (max-width: 860px){
  .spec-grid{ grid-template-columns:repeat(2,1fr); }
}
@media (max-width: 480px){
  .spec-grid{ grid-template-columns:1fr; }
}

/* ============ DESIGN / PARALLAX ============ */
.design-section{
  padding:clamp(5rem,12vh,8rem) clamp(1.25rem,4vw,3.5rem);
  background:var(--carbon);
}
.design-head{ max-width:640px; margin-bottom:4rem; }
.design-copy{ margin-top:1.4rem; font-size:1.02rem; max-width:560px; }

.parallax-stage{
  position:relative;
  height:150vh;
}
.parallax-layer{
  position:absolute;
  overflow:hidden;
  will-change:transform;
  box-shadow:0 30px 60px rgba(0,0,0,0.4);
}
.parallax-layer img{ width:100%; height:100%; object-fit:cover; }
.parallax-layer:nth-child(1){ left:0; top:0; width:44%; height:44vh; }
.parallax-layer:nth-child(2){ right:0; top:16vh; width:48%; height:52vh; }
.parallax-layer:nth-child(3){ left:14%; top:76vh; width:42%; height:44vh; }
.layer-caption{
  position:absolute; left:0; bottom:0; right:0;
  padding:0.9rem 1.1rem;
  background:rgba(11,12,14,0.78);
  font-family:'Sora',sans-serif; font-size:0.74rem; color:var(--off-white);
  letter-spacing:0.02em;
  border-top:1px solid rgba(255,90,31,0.4);
}
@media (max-width: 860px){
  .parallax-stage{ height:auto; display:flex; flex-direction:column; gap:1.4rem; }
  .parallax-layer{ position:relative; width:100% !important; left:auto !important; right:auto !important; top:auto !important; height:46vh !important; }
}

/* ============ POWERTRAIN ============ */
.powertrain-section{
  display:grid; grid-template-columns:1fr 1fr;
  background:var(--carbon-2);
  border-top:1px solid var(--line);
}
.powertrain-media{ height:100%; min-height:480px; overflow:hidden; }
.powertrain-media img{ width:100%; height:100%; object-fit:cover; }
.powertrain-copy{
  padding:clamp(3rem,7vw,5.5rem) clamp(1.5rem,4vw,4rem);
  display:flex; flex-direction:column; justify-content:center;
}
.powertrain-copy p{ font-size:1.02rem; margin-bottom:2rem; max-width:520px; }
.powertrain-list{ list-style:none; margin:0; padding:0; max-width:460px; }
.powertrain-list li{
  display:flex; justify-content:space-between;
  padding:0.9rem 0; border-bottom:1px solid var(--line);
  font-size:0.9rem;
}
.powertrain-list li span:first-child{ color:var(--silver); }
.powertrain-list li span:last-child{ color:var(--off-white); font-family:'Michroma',monospace; font-size:0.78rem; }
@media (max-width: 860px){
  .powertrain-section{ grid-template-columns:1fr; }
  .powertrain-media{ min-height:320px; }
}

/* ============ MATERIALS ============ */
.materials-section{
  padding:clamp(5rem,12vh,8rem) clamp(1.25rem,4vw,3.5rem);
  background:var(--carbon);
}
.materials-section > h2{ max-width:640px; }
.materials-grid{
  margin-top:3rem;
  display:grid; grid-template-columns:repeat(3,1fr); gap:1.6rem;
}
.material-card{
  background:var(--carbon-2);
  border:1px solid var(--line);
}
.material-card img{ width:100%; height:220px; object-fit:cover; }
.material-card h3,.material-card p{ padding:0 1.3rem; }
.material-card h3{ margin-top:1.3rem; font-family:'Sora',sans-serif; font-weight:700; font-size:1.02rem; }
.material-card p{ padding-bottom:1.4rem; font-size:0.88rem; }
@media (max-width: 860px){
  .materials-grid{ grid-template-columns:1fr; }
}

/* ============ REGISTER ============ */
.register-section{
  padding:clamp(5rem,14vh,9rem) clamp(1.25rem,4vw,3.5rem);
  background:var(--carbon-3);
  border-top:1px solid var(--line);
  text-align:center;
}
.register-inner{ max-width:720px; margin:0 auto; }
.register-inner .section-tag{ }
.register-copy{ margin:1.4rem auto 2.6rem; font-size:1.02rem; max-width:540px; }
.register-meta{
  margin-top:3.5rem;
  display:flex; justify-content:center; gap:clamp(2rem,6vw,4.5rem);
  flex-wrap:wrap;
}
.register-meta > div{ display:flex; flex-direction:column; gap:0.5rem; }
.meta-num{ font-size:2rem; color:var(--orange); }
.meta-label{ font-size:0.74rem; letter-spacing:0.05em; text-transform:uppercase; color:var(--silver); }

/* ============ FOOTER ============ */
.site-footer{
  padding:2.6rem clamp(1.25rem,4vw,3.5rem) 6rem;
  background:var(--carbon);
  border-top:1px solid var(--line);
}
.footer-top{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:1.5rem;
  padding-bottom:2rem; margin-bottom:1.6rem; border-bottom:1px solid var(--line);
}
.footer-brand{ font-family:'Michroma',monospace; font-size:0.95rem; display:flex; align-items:center; gap:0.6rem; }
.footer-top nav{ display:flex; gap:1.6rem; flex-wrap:wrap; }
.footer-top nav a{ font-size:0.78rem; color:var(--silver); text-transform:uppercase; letter-spacing:0.04em; }
.footer-top nav a:hover{ color:var(--orange); }
.footer-bottom p{ font-size:0.76rem; color:rgba(199,204,209,0.6); margin-bottom:0.4rem; }

/* demo pill */
.demo-pill{
  position:fixed; left:1rem; bottom:1rem; z-index:300;
  background:rgba(11,12,14,0.85);
  border:1px solid rgba(199,204,209,0.25);
  color:var(--silver);
  font-size:0.68rem; letter-spacing:0.04em;
  padding:0.55rem 0.9rem;
  transition:border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.demo-pill:hover{ border-color:var(--orange); color:var(--orange); }

/* scroll reveal */
.reveal{ opacity:0; transform:translateY(28px); transition:opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.is-visible{ opacity:1; transform:translateY(0); }
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
}