/* ============================================================
   SM CAR CUSTOMS — Premium Automotive Stylesheet
   Black / Charcoal / Racing Red system. No frameworks beyond Tailwind.
   ============================================================ */
:root{
  --sm-black:#060607;
  --sm-charcoal:#0c0d10;
  --sm-graphite:#14161b;
  --sm-panel:#101216;
  --sm-line:rgba(255,255,255,.09);
  --sm-red:#e10600;
  --sm-red-bright:#ff1e14;
  --sm-red-deep:#8f0400;
  --sm-white:#f5f6f7;
  --sm-gray:#a7adb6;
  --sm-metal:#c8ccd2;
  --nav-h:76px;
  --font-display:"Oswald", "Arial Narrow", sans-serif;
  --font-body:"Inter", system-ui, -apple-system, sans-serif;
}
*{ -webkit-tap-highlight-color:transparent; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
}
body{
  background:var(--sm-black);
  color:var(--sm-white);
  font-family:var(--font-body);
  overflow-x:hidden;
  text-rendering:optimizeLegibility;
}
::selection{ background:var(--sm-red); color:#fff; }

/* ---------- Typography ---------- */
.font-display{ font-family:var(--font-display); }
.display-xl{ font-family:var(--font-display); font-weight:700; line-height:.92; letter-spacing:.01em; text-transform:uppercase; }
.eyebrow{
  font-family:var(--font-display); font-size:.78rem; letter-spacing:.32em;
  text-transform:uppercase; color:var(--sm-red-bright);
  display:inline-flex; align-items:center; gap:.75rem;
}
.eyebrow::before{ content:""; width:34px; height:2px; background:var(--sm-red); display:inline-block; }
.h-outline{
  color:transparent; -webkit-text-stroke:1.5px rgba(255,255,255,.85);
}
@media (min-width:768px){ .h-outline{ -webkit-text-stroke-width:2px; } }

/* ---------- Surfaces ---------- */
.carbon{
  background-color:var(--sm-charcoal);
  background-image:
    linear-gradient(27deg, rgba(255,255,255,.025) 4px, transparent 5px),
    linear-gradient(207deg, rgba(255,255,255,.025) 4px, transparent 5px),
    linear-gradient(27deg, rgba(0,0,0,.5) 4px, transparent 5px),
    linear-gradient(207deg, rgba(0,0,0,.5) 4px, transparent 5px);
  background-size:14px 14px;
  background-position:0 0, 7px 0, 7px -7px, 0 7px;
}
.panel{ background:linear-gradient(180deg,#14161b 0%,#0c0d10 100%); border:1px solid var(--sm-line); }
.hairline{ border:1px solid var(--sm-line); }
.red-glow{ box-shadow:0 0 0 1px rgba(225,6,0,.35), 0 18px 60px -18px rgba(225,6,0,.45); }
.hero-vignette::after{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(90% 70% at 50% 38%, transparent 30%, rgba(0,0,0,.55) 72%, rgba(0,0,0,.92) 100%),
             linear-gradient(180deg, rgba(6,6,7,.55) 0%, rgba(6,6,7,.15) 35%, rgba(6,6,7,.94) 100%);
}
.red-line{ height:3px; background:linear-gradient(90deg, var(--sm-red) 0%, var(--sm-red-bright) 55%, transparent 100%); }
.diag-stripes{
  background-image:repeating-linear-gradient(-55deg, var(--sm-red) 0 10px, #0c0d10 10px 20px);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.6rem;
  font-family:var(--font-display); text-transform:uppercase; letter-spacing:.14em;
  font-size:.85rem; font-weight:600; padding:1rem 1.7rem;
  border:1px solid transparent; position:relative;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
  clip-path:polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  min-height:52px; cursor:pointer; text-decoration:none; white-space:nowrap;
}
.btn:active{ transform:translateY(1px) scale(.99); }
.btn-red{ background:linear-gradient(180deg,#f3120a,#b30500); color:#fff; box-shadow:0 12px 34px -12px rgba(225,6,0,.7); }
.btn-red:hover{ background:linear-gradient(180deg,#ff2218,#c80700); box-shadow:0 16px 44px -12px rgba(225,6,0,.85); transform:translateY(-1px); }
.btn-ghost{ background:rgba(255,255,255,.04); border-color:rgba(255,255,255,.22); color:#fff; }
.btn-ghost:hover{ border-color:var(--sm-red-bright); background:rgba(225,6,0,.12); transform:translateY(-1px); }
.btn-wa{ background:linear-gradient(180deg,#22c55e,#15803d); color:#04120a; }
.btn-wa:hover{ transform:translateY(-1px); box-shadow:0 14px 40px -14px rgba(34,197,94,.8); }
.btn:focus-visible, a:focus-visible, button:focus-visible{
  outline:2px solid var(--sm-red-bright); outline-offset:3px; border-radius:2px;
}

/* ---------- Nav ---------- */
#siteNav{ transition:background .3s ease, border-color .3s ease, backdrop-filter .3s ease; border-bottom:1px solid transparent; }
#siteNav.nav-scrolled{ background:rgba(6,6,7,.86); backdrop-filter:blur(14px); border-bottom-color:var(--sm-line); }
.nav-link{ position:relative; font-family:var(--font-display); font-size:.82rem; letter-spacing:.18em; text-transform:uppercase; color:#d6d9de; padding:.5rem 0; }
.nav-link::after{ content:""; position:absolute; left:0; bottom:0; height:2px; width:0; background:var(--sm-red); transition:width .25s ease; }
.nav-link:hover{ color:#fff; } .nav-link:hover::after{ width:100%; }
.nav-link.active{ color:#fff; } .nav-link.active::after{ width:100%; }

/* Mobile menu */
#mobileMenu{ transition:opacity .28s ease, visibility .28s; }
#mobileMenu.open{ opacity:1 !important; visibility:visible !important; }
#mobileMenu.open .mobile-link{ transform:translateY(0); opacity:1; }
.mobile-link{ transform:translateY(14px); opacity:0; transition:transform .35s ease, opacity .35s ease; }
#hamburger span{ display:block; width:26px; height:2px; background:#fff; transition:transform .3s ease, opacity .3s ease; }
#hamburger.open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
#hamburger.open span:nth-child(2){ opacity:0; }
#hamburger.open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ---------- Cards ---------- */
.spec-card{ transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease; }
.spec-card:hover{ transform:translateY(-6px); border-color:rgba(225,6,0,.55); box-shadow:0 24px 60px -24px rgba(225,6,0,.5); }
.spec-card:hover .card-zoom img{ transform:scale(1.07); }
.card-zoom{ overflow:hidden; } .card-zoom img{ transition:transform .6s cubic-bezier(.2,.7,.2,1); }
.accent-bar{ width:44px; height:3px; background:var(--sm-red); transition:width .3s ease; }
.spec-card:hover .accent-bar, .proj:hover .accent-bar{ width:72px; }

/* Marquee */
@keyframes marquee{ from{ transform:translateX(0);} to{ transform:translateX(-50%);} }
.marquee-track{ animation:marquee 26s linear infinite; }
@media (prefers-reduced-motion:reduce){ .marquee-track{ animation:none; } }

/* ---------- Reveal ---------- */
.reveal{ opacity:0; transform:translateY(26px); transition:opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in{ opacity:1; transform:none; }
.reveal-d1{ transition-delay:.08s; } .reveal-d2{ transition-delay:.16s; } .reveal-d3{ transition-delay:.24s; }
@media (prefers-reduced-motion:reduce){ .reveal{ opacity:1; transform:none; } }

/* Page entrance */
@keyframes pageIn{ from{ opacity:0; transform:translateY(10px);} to{ opacity:1; transform:none;} }
.page-enter{ animation:pageIn .5s ease both; }

/* Hero headline sweep */
@keyframes sweepIn{ from{ clip-path:inset(0 100% 0 0);} to{ clip-path:inset(0 0 0 0);} }
.sweep{ animation:sweepIn .9s cubic-bezier(.2,.7,.2,1) both; }

/* Red pulse for WhatsApp float */
@keyframes waPulse{ 0%{ box-shadow:0 0 0 0 rgba(34,197,94,.55);} 70%{ box-shadow:0 0 0 16px rgba(34,197,94,0);} 100%{ box-shadow:0 0 0 0 rgba(34,197,94,0);} }
#waFloat{ animation:waPulse 2.6s infinite; }
@media (prefers-reduced-motion:reduce){ #waFloat{ animation:none; } }

/* Gallery filter */
.g-item{ transition:opacity .35s ease, transform .35s ease; }
.g-item.hide{ opacity:0; transform:scale(.96); pointer-events:none; position:absolute; visibility:hidden; }
.filter-btn.active{ background:var(--sm-red); border-color:var(--sm-red); color:#fff; }

/* Form */
.field{
  width:100%; background:#0a0b0e; border:1px solid var(--sm-line); color:#fff;
  padding:.9rem 1rem; font-size:.95rem; border-radius:2px;
}
.field:focus{ border-color:var(--sm-red-bright); outline:none; box-shadow:0 0 0 2px rgba(225,6,0,.25); }
label.lbl{ font-family:var(--font-display); font-size:.75rem; letter-spacing:.22em; text-transform:uppercase; color:var(--sm-gray); }

/* Spec table rows */
.spec-row{ display:flex; justify-content:space-between; gap:1rem; padding:.7rem 0; border-bottom:1px dashed rgba(255,255,255,.12); font-size:.92rem; }

/* Sticky mobile bar */
#mobileBar{ padding-bottom:env(safe-area-inset-bottom); }
body.has-mobilebar{ padding-bottom:76px; }
@media (min-width:768px){ body.has-mobilebar{ padding-bottom:0; } }

/* Image treatment */
.img-frame{ position:relative; overflow:hidden; background:#0a0b0e; }
.img-frame img{ display:block; width:100%; height:100%; object-fit:cover; }
.img-sheen::before{
  content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background:linear-gradient(105deg, transparent 40%, rgba(255,255,255,.14) 50%, transparent 60%);
  transform:translateX(-120%); transition:transform .8s ease;
}
.img-sheen:hover::before{ transform:translateX(120%); }

/* Footer link */
.f-link{ color:#b9bec7; font-size:.92rem; } .f-link:hover{ color:#fff; }

/* Skip link */
.skip{ position:absolute; left:-9999px; top:0; background:var(--sm-red); color:#fff; padding:.7rem 1rem; z-index:100; }
.skip:focus{ left:8px; top:8px; }

/* Lightbox */
#lightbox{ backdrop-filter:blur(8px); }

/* Check list */
.tick{ width:26px; height:26px; flex:none; display:grid; place-items:center; background:rgba(225,6,0,.14); border:1px solid rgba(225,6,0,.5); color:#ff6b64; font-weight:700; }

/* Number ghost */
.ghost-num{
  font-family:var(--font-display); font-weight:700; font-size:clamp(4rem,10vw,8rem);
  line-height:1; color:transparent; -webkit-text-stroke:1px rgba(255,255,255,.14);
}

/* ============================================================
   VISUAL UPGRADE — cinematic automotive layer
   ============================================================ */

/* Film grain overlay */
.grain::before{
  content:""; position:absolute; inset:0; z-index:2; pointer-events:none; opacity:.09;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}
/* Cinematic photo grade: crushed blacks + red-shadow tint */
.grade{ position:relative; }
.grade img{ filter:saturate(1.06) contrast(1.08) brightness(.94); }
.grade::after{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:linear-gradient(180deg, rgba(6,6,7,.08) 0%, rgba(6,6,7,0) 40%, rgba(6,6,7,.72) 100%),
             linear-gradient(100deg, rgba(225,6,0,.10) 0%, transparent 32%);
  mix-blend-mode:normal;
}
/* Red edge light on one side */
.edge-red{ box-shadow:inset 3px 0 0 var(--sm-red); }

/* Monospace technical labels */
.tech{
  font-family:ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  font-size:.68rem; letter-spacing:.28em; text-transform:uppercase; color:#8d939d;
}
.tech-red{ color:var(--sm-red-bright); }
.spec-tag{
  font-family:ui-monospace, Menlo, Consolas, monospace; font-size:.66rem; letter-spacing:.18em;
  text-transform:uppercase; color:#d6d9de; border:1px solid rgba(255,255,255,.22);
  background:rgba(6,6,7,.62); padding:.4rem .7rem; backdrop-filter:blur(6px);
}

/* Angled / diagonal separators */
.slant-top{ clip-path:polygon(0 3.5vw, 100% 0, 100% 100%, 0 100%); margin-top:-3.5vw; padding-top:calc(3.5vw + 3rem); }
.slant-bottom{ clip-path:polygon(0 0, 100% 0, 100% calc(100% - 3.5vw), 0 100%); padding-bottom:calc(3.5vw + 3rem); }
@media (max-width:640px){ .slant-top{ clip-path:none; margin-top:0; padding-top:3rem; } .slant-bottom{ clip-path:none; padding-bottom:3rem; } }

/* Image clip-path reveal */
.clip-reveal{ clip-path:inset(6% 4% 6% 4%); transform:scale(.985); opacity:0;
  transition:clip-path 1s cubic-bezier(.2,.7,.2,1), transform 1s cubic-bezier(.2,.7,.2,1), opacity .8s ease; }
.clip-reveal.in{ clip-path:inset(0 0 0 0); transform:none; opacity:1; }
@media (prefers-reduced-motion:reduce){ .clip-reveal{ clip-path:none; transform:none; opacity:1; } }

/* Red line draw-on-scroll */
.draw-line{ transform:scaleX(0); transform-origin:left; transition:transform 1.1s cubic-bezier(.2,.7,.2,1) .15s; }
.in .draw-line, .draw-line.in{ transform:scaleX(1); }

/* Garage tile */
.tile{ position:relative; overflow:hidden; background:#0a0b0e; border:1px solid var(--sm-line); display:block; }
.tile img{ width:100%; height:100%; object-fit:cover; display:block; transition:transform .8s cubic-bezier(.2,.7,.2,1), filter .5s ease; filter:saturate(1.02) contrast(1.06) brightness(.9); }
.tile:hover img{ transform:scale(1.06); filter:saturate(1.1) contrast(1.08) brightness(1); }
.tile .tile-shade{ position:absolute; inset:0; background:linear-gradient(180deg, rgba(6,6,7,.05) 30%, rgba(6,6,7,.55) 68%, rgba(6,6,7,.94) 100%); }
.tile .tile-bar{ position:absolute; left:0; bottom:0; height:3px; width:0; background:var(--sm-red-bright); transition:width .45s ease; }
.tile:hover .tile-bar{ width:100%; }
.tile .tile-cta{ opacity:0; transform:translateY(8px); transition:opacity .3s ease, transform .3s ease; }
.tile:hover .tile-cta, .tile:focus-within .tile-cta{ opacity:1; transform:none; }
@media (hover:none){ .tile .tile-cta{ opacity:1; transform:none; } }

/* Marquee band */
.marquee{ overflow:hidden; white-space:nowrap; border-top:1px solid var(--sm-line); border-bottom:1px solid var(--sm-line); }
.marquee-inner{ display:inline-flex; gap:0; animation:marquee 30s linear infinite; will-change:transform; }
.marquee span{ font-family:var(--font-display); font-size:clamp(1rem,2.4vw,1.5rem); letter-spacing:.3em;
  text-transform:uppercase; padding:1rem 1.6rem; color:#3a3f47; }
.marquee span b{ color:var(--sm-red-bright); font-weight:600; }

/* Hero spec chips */
.hero-chip{ border:1px solid rgba(255,255,255,.16); background:rgba(6,6,7,.55); backdrop-filter:blur(8px);
  padding:.55rem .9rem; font-family:var(--font-display); font-size:.72rem; letter-spacing:.24em; text-transform:uppercase; }
@keyframes heroRise{ from{ opacity:0; transform:translateY(34px);} to{ opacity:1; transform:none;} }
.hero-rise{ animation:heroRise .9s cubic-bezier(.2,.7,.2,1) both; }
.hero-rise-1{ animation-delay:.1s } .hero-rise-2{ animation-delay:.22s }
.hero-rise-3{ animation-delay:.34s } .hero-rise-4{ animation-delay:.46s }
@media (prefers-reduced-motion:reduce){ .hero-rise{ animation:none; } }

/* Editorial callout line */
.callout{ position:relative; padding-left:1.1rem; }
.callout::before{ content:""; position:absolute; left:0; top:.35rem; bottom:.35rem; width:2px; background:var(--sm-red); }
.callout-dot{ position:absolute; left:-4px; top:.3rem; width:10px; height:10px; background:var(--sm-red); transform:rotate(45deg); }

/* Insta tile */
.insta{ position:relative; overflow:hidden; border:1px solid var(--sm-line); display:block; aspect-ratio:1/1; background:#0a0b0e; }
.insta img{ width:100%; height:100%; object-fit:cover; transition:transform .6s cubic-bezier(.2,.7,.2,1); filter:brightness(.92); }
.insta:hover img{ transform:scale(1.08); }
.insta::after{ content:""; position:absolute; inset:0; background:linear-gradient(180deg,transparent 55%,rgba(6,6,7,.8)); opacity:.9; }

/* CTA banner */
.cta-band{ position:relative; overflow:hidden; background:
  linear-gradient(105deg, #0c0d10 55%, rgba(225,6,0,.28) 100%), #0c0d10; }
.cta-band::before{ content:""; position:absolute; right:-70px; top:-70px; width:340px; height:340px;
  background:repeating-linear-gradient(-55deg, rgba(225,6,0,.5) 0 14px, transparent 14px 28px);
  transform:skewX(-12deg); opacity:.5; }
@media (max-width:768px){ .cta-band::before{ opacity:.28; } }

/* Page hero */
.page-hero{ position:relative; overflow:hidden; }
.page-hero .ph-img{ position:absolute; inset:0; }
.page-hero .ph-img img{ width:100%; height:100%; object-fit:cover; filter:saturate(1.05) contrast(1.08) brightness(.62); }
.page-hero .ph-shade{ position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(6,6,7,.62) 0%, rgba(6,6,7,.35) 45%, rgba(6,6,7,.95) 100%); }

/* Transformation steps */
.step-rail{ position:relative; }
.step-rail::before{ content:""; position:absolute; left:23px; top:8px; bottom:8px; width:2px;
  background:linear-gradient(180deg, var(--sm-red), rgba(225,6,0,.08)); }
.step-dot{ width:48px; height:48px; flex:none; display:grid; place-items:center; z-index:1;
  background:#0a0b0e; border:1px solid rgba(225,6,0,.55); color:#fff;
  font-family:var(--font-display); font-weight:700; letter-spacing:.05em;
  clip-path:polygon(50% 0, 100% 25%, 100% 75%, 50% 100%, 0 75%, 0 25%); }

/* Before/after */
.ba{ position:relative; overflow:hidden; }
.ba .ba-after{ position:absolute; inset:0; }
.ba input[type=range]{ position:absolute; inset:0; width:100%; opacity:0; cursor:ew-resize; z-index:3; height:100%; }
.ba-handle{ position:absolute; top:0; bottom:0; width:2px; background:var(--sm-red-bright); z-index:2; }
.ba-knob{ position:absolute; top:50%; transform:translate(-50%,-50%); z-index:2;
  background:var(--sm-red); color:#fff; font-family:var(--font-display); font-size:.7rem; letter-spacing:.15em;
  padding:.5rem .8rem; white-space:nowrap; }