/* ============================================================================
   built8hp.shop — design system mirroring 8hpswap.shop (same brand)
   Tokens copied from the live 8hpswap stylesheet (:root HSL vars, Oxanium).
   ========================================================================== */
:root{
  /* core palette (identical to 8hpswap.shop) */
  --background: 220 20% 4%;
  --foreground: 200 20% 95%;
  --border: 210 15% 14%;
  --card: 220 18% 7%;
  --card-foreground: 200 20% 95%;
  --card-border: 210 15% 12%;
  --primary: 195 100% 50%;
  --primary-foreground: 220 25% 4%;
  --secondary: 220 15% 12%;
  --secondary-foreground: 200 15% 85%;
  --muted: 220 12% 11%;
  --muted-foreground: 210 10% 50%;
  --accent: 195 40% 12%;
  --accent-foreground: 195 100% 70%;
  --neon-green: 145 100% 50%;
  --neon-blue: 195 100% 50%;
  --neon-purple: 270 100% 60%;
  --font-sans: "Oxanium", "Inter", sans-serif;
  --font-mono: Menlo, monospace;
  --radius: .5rem;

  /* convenience */
  --bg: hsl(var(--background));
  --fg: hsl(var(--foreground));
  --panel: hsl(var(--card));
  --line: hsl(var(--border));
  --line-2: hsl(var(--card-border));
  --muted-fg: hsl(var(--muted-foreground));
  --brand: hsl(var(--primary));
  --brand-fg: hsl(var(--primary-foreground));
  --green: hsl(var(--neon-green));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-sans);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img{max-width:100%}
:focus-visible{outline:1px solid var(--brand);outline-offset:2px}

/* ---------- top contact bar (cyan, full width) ---------- */
.topbar{
  background:hsl(var(--primary));
  color:hsl(var(--primary-foreground));
  padding:.5rem 1rem;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:.125rem .75rem;text-align:center;
}
.topbar p{margin:0;font-size:.6875rem;font-weight:600;line-height:1.25;letter-spacing:.025em}
.topbar .links{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:.125rem .75rem;
  font-size:.6875rem;font-weight:600;letter-spacing:.025em}
.topbar .links a{white-space:nowrap;text-decoration:underline;text-underline-offset:2px}
.topbar .links a:hover{opacity:.8}
.topbar .links .sep{opacity:.5}
@media(min-width:640px){
  .topbar{flex-direction:row}
  .topbar p,.topbar .links{font-size:.75rem}
}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:72rem;margin-inline:auto;padding-inline:1.5rem}
.narrow{max-width:56rem}
.wrap-narrow{width:100%;max-width:58rem;margin-inline:auto;padding-inline:1.5rem}

/* ---------- ambient overlays (subtle, as on 8hpswap) ---------- */
.glow{
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(60% 45% at 50% 0%, hsl(195 100% 50% / .10), transparent 70%),
    radial-gradient(40% 30% at 80% 10%, hsl(145 100% 50% / .05), transparent 70%);
}
.scanline{
  position:fixed;left:0;width:100%;height:4px;z-index:2;pointer-events:none;
  background:hsl(195 100% 50% / .03);
  animation:scanline 8s linear infinite;
}
@keyframes scanline{0%{transform:translateY(-100%)}100%{transform:translateY(100vh)}}
main{position:relative;z-index:1}

/* ---------- animations ---------- */
@keyframes slide-up{0%{opacity:0;transform:translateY(24px)}100%{opacity:1;transform:translateY(0)}}
.su-1{opacity:0;animation:slide-up .4s ease-out 0s forwards}
.su-2{opacity:0;animation:slide-up .4s ease-out .1s forwards}
.su-3{opacity:0;animation:slide-up .4s ease-out .2s forwards}
.su-4{opacity:0;animation:slide-up .4s ease-out .3s forwards}
.su-5{opacity:0;animation:slide-up .4s ease-out .4s forwards}
.su-6{opacity:0;animation:slide-up .4s ease-out .5s forwards}
@keyframes flicker{0%,100%{opacity:1}92%{opacity:1}93%{opacity:.8}94%{opacity:1}96%{opacity:.9}97%{opacity:1}}
.flicker{animation:flicker 4s ease-in-out infinite}
@keyframes neon-pulse{
  0%,100%{opacity:1;text-shadow:0 0 10px hsl(195 100% 50% / .5),0 0 20px hsl(195 100% 50% / .3)}
  50%{opacity:.85;text-shadow:0 0 5px hsl(195 100% 50% / .3),0 0 10px hsl(195 100% 50% / .15)}
}
@media(prefers-reduced-motion:reduce){
  .su-1,.su-2,.su-3,.su-4,.su-5,.su-6{animation:none;opacity:1}
  .flicker{animation:none}
  .scanline{display:none}
  html{scroll-behavior:auto}
}

/* ---------- typography ---------- */
h1{
  font-size:2.25rem;font-weight:800;line-height:.95;letter-spacing:-.025em;
  font-style:italic;text-transform:uppercase;margin:0 0 1rem;
}
h2{
  font-size:1.5rem;font-weight:800;font-style:italic;text-transform:uppercase;
  letter-spacing:-.02em;margin:0 0 .5rem;line-height:1.05;
}
h3{font-size:1.0625rem;font-weight:700;font-style:italic;text-transform:uppercase;letter-spacing:.01em;margin:0 0 .375rem}
@media(min-width:768px){h1{font-size:3.75rem}h2{font-size:2rem}}
@media(min-width:1024px){h1{font-size:4.5rem}h2{font-size:2.25rem}}
.grad{
  background:linear-gradient(135deg,#3cf,#0fa);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 30px hsl(195 100% 50% / .4));
}
.glow-text{filter:drop-shadow(0 0 30px hsl(195 100% 50% / .3))}
.kicker{
  color:var(--brand);font-size:.75rem;font-weight:700;letter-spacing:.25em;
  text-transform:uppercase;margin:0 0 1rem;
}
.lede{color:var(--muted-fg);font-size:1rem;line-height:1.6;margin:0 auto 1.75rem;max-width:44rem}
@media(min-width:768px){.lede{font-size:1.125rem}}
.sub{color:var(--muted-fg);margin:0 0 1.75rem;font-size:.9375rem;line-height:1.55}

/* ---------- hero ---------- */
.hero{display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:3.5rem 1.5rem 2.5rem;position:relative}
.hero-logo{
  height:4rem;width:auto;margin:0 auto 1.5rem;display:block;
  filter:drop-shadow(0 0 30px hsl(195 100% 50% / .4));
}
@media(min-width:768px){.hero-logo{height:5rem}}
@media(min-width:1024px){.hero-logo{height:6rem}}
.feats{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:.75rem 1.5rem;
  color:var(--brand);font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  margin:0 0 2rem}
.feats span{display:inline-flex;align-items:center;gap:.5rem}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  height:2.5rem;padding:0 2rem;border-radius:calc(var(--radius) - 2px);
  font-size:1rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase;
  border:1px solid transparent;transition:opacity .15s,transform .1s;white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{
  background:hsl(var(--primary));color:hsl(var(--primary-foreground));
  border-color:color-mix(in srgb, hsl(var(--primary)) 84%, black);
  box-shadow:0 0 20px hsl(195 100% 50% / .2),0 0 40px hsl(195 100% 50% / .1),0 0 80px hsl(195 100% 50% / .05);
}
.btn-primary:hover{opacity:.92}
.btn-ghost{background:transparent;color:var(--brand);border-color:transparent}
.btn-ghost:hover{background:hsl(var(--accent))}
.btn-outline{background:transparent;color:var(--fg);border-color:var(--line)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.cta-row{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}

/* ---------- step indicator (numbered circles + labels, as 8hpswap) ---------- */
.adv{padding:2rem 0 4rem}
.adv-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}
.adv-top .back{color:var(--brand);font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  display:inline-flex;align-items:center;gap:.5rem}
.adv-top .back:hover{opacity:.8}
.adv-top .count{color:var(--brand);font-size:.75rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase}
.steps{
  display:grid;grid-template-columns:repeat(5,1fr);gap:.5rem;
  border-bottom:1px solid var(--line);padding-bottom:1.25rem;margin-bottom:2rem;
}
.step{display:flex;flex-direction:column;align-items:center;gap:.5rem;position:relative;text-align:center}
.step i{
  width:2rem;height:2rem;border-radius:999px;display:grid;place-items:center;
  font-style:normal;font-size:.8125rem;font-weight:700;
  border:1px solid var(--line);color:var(--muted-fg);background:hsl(var(--secondary));
}
.step span{font-size:.625rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted-fg)}
.step.done i{background:var(--brand);border-color:var(--brand);color:hsl(var(--primary-foreground))}
.step.done span{color:var(--brand)}
.step.on i{background:var(--brand);border-color:var(--brand);color:hsl(var(--primary-foreground));
  box-shadow:0 0 16px hsl(195 100% 50% / .45)}
.step.on span{color:var(--brand)}
.step.on::after{
  content:"";position:absolute;bottom:-1.25rem;left:0;right:0;height:2px;background:var(--brand);
}
@media(max-width:640px){
  .step span{font-size:.5rem;letter-spacing:.06em}
  .step i{width:1.625rem;height:1.625rem;font-size:.6875rem}
}

/* ---------- cards / options ---------- */
.grid{display:grid;gap:1rem}
.g2{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.g3{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.g3{grid-template-columns:1fr}}
.g4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

.card{
  background:hsl(var(--card));border:1px solid var(--line-2);border-radius:var(--radius);
  padding:1.25rem;transition:border-color .15s,background .15s;
}
.opt{text-align:left;width:100%;display:block}
.opt:hover{border-color:hsl(var(--primary) / .5);background:hsl(195 40% 12% / .35)}
.opt .eyebrow{color:var(--brand);font-size:.6875rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;margin-bottom:.5rem}
.opt p{margin:0;color:var(--muted-fg);font-size:.875rem;line-height:1.5}
.opt h3{color:var(--fg)}

/* home family card — reference anatomy: title / big cyan capacity / small cyan tag */
.fam-cap{font-size:1.25rem;font-weight:800;font-style:italic;color:var(--brand);
  letter-spacing:.01em;margin:.5rem 0 0;text-shadow:0 0 18px hsl(195 100% 50% / .35)}
.fam-tag{font-size:.8125rem;font-weight:700;color:var(--brand);margin:.375rem 0 0}
.fam-price{font-size:.8125rem;font-weight:700;color:var(--fg);margin:.625rem 0 0;padding-top:.625rem;border-top:1px solid var(--line-2)}
.opt .family-note{color:var(--muted-fg);font-size:.8125rem;line-height:1.5;margin:.625rem 0 0}

/* stat chips — the cyan-bordered boxes inside cards */
.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem}
.chip{
  border:1px solid hsl(195 100% 50% / .45);background:hsl(195 40% 12% / .55);
  border-radius:calc(var(--radius) - 2px);padding:.375rem .625rem;
  font-size:.6875rem;font-weight:700;line-height:1.25;color:hsl(var(--accent-foreground));
}
.chip.muted{border-color:var(--line);background:hsl(var(--secondary));color:var(--muted-fg)}
.chip.green{border-color:hsl(145 100% 50% / .45);color:var(--green)}
.chip.amber{border-color:hsl(40 100% 50% / .45);color:hsl(40 100% 65%)}

/* capacity bars */
.bars{display:flex;gap:3px;margin-top:.875rem}
.bars i{width:5px;height:16px;border-radius:1px;background:hsl(195 100% 50% / .28);display:block}
.bars i.f{background:var(--brand);box-shadow:0 0 8px hsl(195 100% 50% / .5)}
.bars i.r{background:hsl(0 84% 55%);box-shadow:0 0 8px hsl(0 84% 55% / .5)}

/* callout */
.callout{
  border:1px solid hsl(195 100% 50% / .3);background:hsl(var(--card));
  border-radius:var(--radius);padding:1.25rem 1.5rem;text-align:center;margin-top:2.5rem;
  box-shadow:inset 0 0 15px hsl(195 100% 50% / .05);
}
.callout p{margin:0;font-size:.875rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;line-height:1.5}
@media(min-width:768px){.callout p{font-size:1rem}}

/* ---------- result / build sheet ---------- */
.panel{
  background:linear-gradient(180deg,hsl(var(--card)),hsl(220 18% 6%));
  border:1px solid var(--line-2);border-radius:var(--radius);padding:1.5rem;
}
@media(min-width:768px){.panel{padding:2rem}}
.res-head{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:flex-start;margin-bottom:1.5rem}
.badge{
  display:inline-flex;align-items:center;gap:.5rem;padding:.375rem .75rem;border-radius:999px;
  background:hsl(195 40% 12%);border:1px solid hsl(195 100% 50% / .35);color:var(--brand);
  font-size:.6875rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
}
.price{font-size:2.25rem;font-weight:800;font-style:italic;letter-spacing:-.02em;color:var(--brand);
  text-shadow:0 0 24px hsl(195 100% 50% / .35);margin:0}
.price-note{color:var(--muted-fg);font-size:.8125rem;margin:.375rem 0 0}
.cols{display:grid;gap:1rem}
@media(min-width:900px){.cols{grid-template-columns:1.15fr .85fr}}
.box{border:1px solid var(--line-2);border-radius:var(--radius);padding:1rem 1.125rem;
  background:hsl(220 18% 6% / .6);margin-bottom:1rem}
.box h4{margin:0 0 .75rem;font-size:.75rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand)}
.box ul{margin:0;padding-left:1.125rem;color:var(--fg);font-size:.875rem;line-height:1.55}
.box li{margin:.375rem 0}
.kv{display:grid;grid-template-columns:1fr auto;gap:.5rem 1rem;font-size:.875rem}
.kv span{color:var(--muted-fg)}
.kv b{font-weight:700;text-align:right;font-variant-numeric:tabular-nums}
.warnbox{border-color:hsl(40 100% 50% / .4);background:hsl(40 100% 50% / .06)}
.warnbox h4{color:hsl(40 100% 65%)}
.warnbox p{color:var(--fg);margin:0;font-size:.875rem;line-height:1.55}
.honesty{
  border:1px dashed hsl(195 100% 50% / .45);background:hsl(195 40% 12% / .4);
  border-radius:var(--radius);padding:.875rem 1rem;margin-bottom:1.5rem;text-align:center;
  color:var(--brand);font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
}
.honesty small{display:block;margin-top:.375rem;font-size:.75rem;font-weight:600;letter-spacing:.01em;
  text-transform:none;color:var(--muted-fg);line-height:1.5}

/* addon row */
.addon{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;
  border:1px solid var(--line-2);border-radius:var(--radius);padding:1rem;background:hsl(220 18% 6% / .6);
  margin-bottom:.625rem;cursor:pointer}
.addon:hover{border-color:hsl(195 100% 50% / .4)}
.addon input{width:1.0625rem;height:1.0625rem;accent-color:var(--brand);margin-right:.625rem}
.addon .t{display:flex;align-items:center;font-weight:700;font-style:italic;text-transform:uppercase;
  font-size:.875rem;margin:0 0 .25rem}
.addon p{margin:0;color:var(--muted-fg);font-size:.8125rem;line-height:1.5}
.addon .p{white-space:nowrap;font-variant-numeric:tabular-nums;color:var(--brand);font-weight:700}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);padding:3rem 0;margin-top:4rem}
.foot .cols3{display:grid;gap:2rem}
@media(min-width:768px){.foot .cols3{grid-template-columns:repeat(3,1fr)}}
.foot h5{margin:0 0 .5rem;font-size:.75rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand)}
.foot p{margin:0;color:var(--muted-fg);font-size:.8125rem;line-height:1.6}
.foot .links{margin-top:2rem;display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center;
  color:var(--muted-fg);font-size:.8125rem}
.foot .links a{color:var(--brand)}
.foot .links a:hover{text-decoration:underline}
.foot .copyright{margin-top:1.5rem;text-align:center;color:var(--muted-fg);font-size:.75rem}


/* --- Stage 3 -> Stage 3+ upgrade affordance -------------------------------------------
   The billet main shaft is included in Stage 3+, so selecting it on a Stage 3 build promotes
   the stage rather than adding a line item. These styles make that read as an upgrade. */
.addon-promote{
  border-color:hsl(var(--primary) / .45);
  background:hsl(var(--accent) / .35);
}
.addon-promote .tag{
  display:inline-block;margin-left:.5rem;padding:.1rem .45rem;border-radius:999px;
  background:var(--brand);color:var(--brand-fg);font-size:.625rem;font-weight:800;
  letter-spacing:.08em;text-transform:uppercase;vertical-align:middle;white-space:nowrap;
}
.stagenote{
  display:flex;gap:1rem;align-items:center;justify-content:space-between;flex-wrap:wrap;
  margin:0 0 1.5rem;padding:.75rem 1rem;border:1px solid hsl(var(--primary) / .35);
  border-radius:var(--radius);background:hsl(var(--accent) / .3);
  color:var(--muted-fg);font-size:.8125rem;line-height:1.5;
}
.btn-xs{padding:.4rem .75rem;font-size:.75rem;letter-spacing:.06em;}
@media(max-width:620px){
  .stagenote{align-items:flex-start;flex-direction:column;}
  .stagenote .btn-xs{width:100%;}
}