/* GokartDrift: dark, flat surfaces, one red accent from the logo.
   Type steps and spacing follow the landing-page-design scale. */
:root {
  color-scheme: dark;
  --bg: #181818;
  --bg-deep: #000000;
  --surface: #1f1f1f;
  --surface-2: #272727;
  --line: #313131;
  --text: #f4f4f2;
  --muted: #a3a3a0;
  --red: #e30613;
  --red-hover: #ff1f2c;
  --ok: #3ccf7a;
  --err: #ff6b6b;

  --s-25: 2px; --s-50: 4px; --s-75: 8px; --s-100: 12px; --s-200: 16px;
  --s-300: 24px; --s-400: 32px; --s-500: 40px; --s-600: 48px;
  --s-700: 64px; --s-800: 80px; --s-900: 96px;

  --ease: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --page: 1200px;
  --gutter: var(--s-300);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Manrope", system-ui, sans-serif;
  font-size: 1rem; line-height: 1.5rem;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
a { color: inherit; }
h1, h2, h3 { margin: 0; text-wrap: balance; font-weight: 700; letter-spacing: -0.02em; }
p, li { text-wrap: pretty; }
p { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; margin: 0; padding: 0; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; border-radius: 6px; }
[id], input, textarea { scroll-margin-top: 144px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.skip-link {
  position: fixed; left: var(--s-200); top: var(--s-200); z-index: 100;
  padding: var(--s-75) var(--s-100); background: var(--text); color: var(--bg-deep);
  border-radius: 8px; font-weight: 600; transform: translateY(-200%);
  transition: transform 300ms var(--ease);
}
.skip-link:focus { transform: none; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-75);
  padding: var(--s-75) var(--s-100);
  min-height: 44px;
  border: 0; border-radius: 9999px; cursor: pointer;
  font: 600 1rem/1.5rem "Manrope", sans-serif; text-decoration: none;
  transition: background-color 300ms var(--ease), transform 300ms var(--ease);
}
.btn--primary { background: var(--red); color: #fff; padding-inline: var(--s-300); }
.btn--primary:hover { background: var(--red-hover); transform: translateY(-1px); }
.btn:active { transform: scale(0.98); }
.btn--sm { font-size: 0.875rem; line-height: 1.25rem; min-height: 36px; padding-inline: var(--s-200); }
.btn--block { width: 100%; }
.btn[disabled] { opacity: 0.6; cursor: progress; }
.btn .ph { font-size: 1.125rem; transition: transform 300ms var(--ease); }
.btn:hover .ph-arrow-right { transform: translateX(3px); }

/* Fluid island nav */
.nav-wrap { position: fixed; inset: 0 0 auto; z-index: 50; display: flex; flex-direction: column; align-items: center; padding: 0 var(--s-200); pointer-events: none; }
.island {
  pointer-events: auto;
  margin-top: var(--s-300); width: max-content; max-width: 100%;
  display: flex; align-items: center; gap: var(--s-300);
  padding: var(--s-75) var(--s-75) var(--s-75) var(--s-300);
  border-radius: 9999px; border: 1px solid rgb(255 255 255 / 0.08);
  background: rgb(24 24 24 / 0.72);
  backdrop-filter: blur(20px) saturate(140%); -webkit-backdrop-filter: blur(20px) saturate(140%);
}
.island__logo img { width: 120px; height: auto; }
.island__links { display: flex; gap: var(--s-50); }
.island__links a {
  display: block; padding: var(--s-75) var(--s-100); border-radius: 9999px;
  font-size: 0.875rem; line-height: 1.25rem; font-weight: 500; color: var(--muted); text-decoration: none;
  transition: color 300ms var(--ease), background-color 300ms var(--ease);
}
.island__links a:hover { color: var(--text); background: rgb(255 255 255 / 0.06); }
.island__links a[aria-current="true"] { color: var(--text); background: rgb(255 255 255 / 0.08); }

.burger { display: none; position: relative; width: 44px; height: 44px; border: 0; border-radius: 9999px; background: rgb(255 255 255 / 0.06); cursor: pointer; }
.burger span { position: absolute; left: 13px; right: 13px; height: 2px; border-radius: 2px; background: var(--text); transition: transform 700ms var(--ease), top 700ms var(--ease); }
.burger span:first-child { top: 18px; }
.burger span:last-child { top: 24px; }
.burger[aria-expanded="true"] span:first-child { top: 21px; transform: rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { top: 21px; transform: rotate(-45deg); }

.menu {
  position: fixed; inset: 0; z-index: 40; display: grid; place-items: center;
  background: rgb(0 0 0 / 0.8); backdrop-filter: blur(64px); -webkit-backdrop-filter: blur(64px);
  opacity: 0; transition: opacity 500ms var(--ease);
}
.menu.is-open { opacity: 1; }
.menu ul { display: grid; gap: var(--s-200); text-align: center; }
.menu li { overflow: hidden; }
.menu a {
  display: inline-block; padding: var(--s-75) var(--s-200);
  font-size: 1.875rem; line-height: 2.25rem; font-weight: 600; text-decoration: none;
  transform: translateY(48px); opacity: 0;
  transition: transform 700ms var(--ease), opacity 700ms var(--ease);
}
.menu.is-open a { transform: none; opacity: 1; }
.menu li:nth-child(1) a { transition-delay: 100ms; }
.menu li:nth-child(2) a { transition-delay: 150ms; }
.menu li:nth-child(3) a { transition-delay: 200ms; }
.menu li:nth-child(4) a { transition-delay: 250ms; }
.menu li:nth-child(5) a { transition-delay: 300ms; }
.menu__cta { color: var(--red); }

/* Scroll interpolation */
.reveal { opacity: 0; transform: translateY(64px); filter: blur(12px); transition: opacity 900ms var(--ease), transform 900ms var(--ease), filter 900ms var(--ease); }
.reveal.is-in { opacity: 1; transform: none; filter: none; }
.no-js .reveal { opacity: 1; transform: none; filter: none; }

/* Layout */
.section, .stats, .tagline, .final { width: min(100% - 2 * var(--gutter), var(--page)); margin-inline: auto; }
.section { padding-block: var(--s-900); }
.section__head { display: grid; gap: var(--s-200); max-width: 680px; margin-bottom: var(--s-600); }
.section__head h2 { font-size: 2.25rem; line-height: 2.5rem; }
.section__head p { color: var(--muted); font-size: 1.125rem; line-height: 1.75rem; }

/* Hero */
.hero {
  width: min(100% - 2 * var(--gutter), var(--page)); margin-inline: auto;
  min-height: min(100svh, 860px); padding-top: 160px; padding-bottom: var(--s-800);
  display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 7fr); gap: var(--s-600); align-items: center;
}
.hero__copy { display: grid; gap: var(--s-300); }
.hero__title {
  max-width: 680px; font-size: 3rem; line-height: 1; letter-spacing: -0.035em;
  background: linear-gradient(90deg, #ffffff, #9b9b9b); -webkit-background-clip: text; background-clip: text; color: transparent;
  padding-bottom: var(--s-50);
}
.hero__sub { max-width: 680px; color: var(--muted); font-size: 1.125rem; line-height: 1.75rem; }
.hero__price { margin: 0; font-size: 0.875rem; line-height: 1.25rem; color: var(--muted); }
.hero__price strong { display: block; color: var(--text); font-size: 1.25rem; line-height: 1.75rem; font-variant-numeric: tabular-nums; }

/* 3D stage */
.stage { margin: 0; border-radius: 24px; background: var(--bg-deep); border: 1px solid var(--line); overflow: hidden; }
.stage__canvas { position: relative; aspect-ratio: 4 / 3; cursor: grab; touch-action: pan-y; }
.stage__canvas:active { cursor: grabbing; }
.stage__canvas canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; opacity: 0; transition: opacity 900ms var(--ease); }
.stage__canvas.is-ready canvas { opacity: 1; }
.stage__skeleton { position: absolute; inset: 0; display: grid; place-content: center; gap: var(--s-100); justify-items: center; transition: opacity 500ms var(--ease); }
.stage__canvas.is-ready .stage__skeleton { opacity: 0; pointer-events: none; }
.stage__skeleton span { display: block; height: 12px; border-radius: 9999px; background: linear-gradient(90deg, #1f1f1f, #313131, #1f1f1f); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; }
.stage__skeleton span:nth-child(1) { width: 220px; height: 80px; border-radius: 16px; }
.stage__skeleton span:nth-child(2) { width: 160px; }
.stage__skeleton span:nth-child(3) { width: 100px; }
@keyframes shimmer { to { background-position: -200% 0; } }
.stage__fallback { position: absolute; inset: 0; display: grid; place-items: center; padding: var(--s-300); text-align: center; color: var(--muted); }
.stage__bar { display: flex; align-items: center; justify-content: space-between; gap: var(--s-200); flex-wrap: wrap; padding: var(--s-200) var(--s-300); border-top: 1px solid var(--line); background: var(--surface); }
.stage__hint { display: inline-flex; align-items: center; gap: var(--s-75); color: var(--muted); font-size: 0.875rem; line-height: 1.25rem; }

/* Swatches */
.swatches { display: flex; align-items: center; flex-wrap: wrap; gap: var(--s-75); border: 0; margin: 0; padding: 0; min-width: 0; }
.swatches__label { float: left; margin-right: var(--s-100); padding: 0; font-size: 0.875rem; line-height: 1.25rem; color: var(--muted); }
.swatches__label strong { color: var(--text); font-weight: 600; }
.swatch { position: relative; width: 32px; height: 32px; }
.swatch input { position: absolute; inset: 0; margin: 0; opacity: 0; cursor: pointer; }
.swatch span {
  display: block; width: 100%; height: 100%; border-radius: 9999px; background: var(--c);
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.32), 0 0 0 2px var(--surface), 0 0 0 2px transparent;
  transition: box-shadow 300ms var(--ease), transform 300ms var(--ease);
}
.swatch:hover span { transform: scale(1.08); }
.swatch input:checked + span { box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.32), 0 0 0 3px var(--surface), 0 0 0 5px var(--text); }
.swatch input:focus-visible + span { outline: 2px solid var(--red); outline-offset: 6px; }
.swatches--form .swatch { width: 40px; height: 40px; }
.swatches--form .swatch span { box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.32), 0 0 0 3px var(--surface-2), 0 0 0 3px transparent; }
.swatches--form .swatch input:checked + span { box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.32), 0 0 0 3px var(--surface-2), 0 0 0 5px var(--text); }

/* Stats */
.stats { padding-block: var(--s-800) var(--s-700); border-block: 1px solid var(--line); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-400); margin: 0; }
.stat { display: grid; gap: var(--s-75); }
.stat dt { color: var(--muted); font-size: 0.875rem; line-height: 1.25rem; }
.stat dd { margin: 0; display: flex; align-items: baseline; gap: var(--s-75); font-size: 3.75rem; line-height: 1; font-weight: 600; letter-spacing: -0.04em; font-variant-numeric: tabular-nums; }
.stat dd small { font-size: 1.25rem; line-height: 1.75rem; font-weight: 500; letter-spacing: 0; color: var(--muted); }
.stats__note { margin-top: var(--s-400); color: var(--muted); font-size: 0.75rem; line-height: 1rem; }

/* Tagline reveal */
.tagline { padding-block: 160px; }
.tagline__text { max-width: 880px; font-size: 3rem; line-height: 1.1; font-weight: 600; letter-spacing: -0.03em; text-wrap: balance; }
.tagline__text .w { color: rgb(244 244 242 / 0.28); transition: color 700ms var(--ease); }
.tagline__text .w.is-lit { color: var(--text); }
.tagline__text .w.is-accent.is-lit { color: var(--red); }

/* Benefits */
.benefits { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-200); }
.benefit { display: grid; align-content: start; gap: var(--s-100); padding: var(--s-400); border-radius: 24px; background: var(--surface); border: 1px solid var(--line); transition: border-color 500ms var(--ease), transform 500ms var(--ease); }
.benefit:hover { border-color: #444; }
.benefit--wide { grid-column: span 2; grid-row: span 1; }
.benefit h3 { font-size: 1.25rem; line-height: 1.75rem; }
.benefit p { color: var(--muted); }
.benefit__icon { font-size: 1.875rem; color: var(--red); margin-bottom: var(--s-100); }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-400); counter-reset: step; }
.step { display: grid; align-content: start; gap: var(--s-100); padding-top: var(--s-300); border-top: 1px solid var(--line); }
.step__num { font-size: 0.875rem; line-height: 1.25rem; font-weight: 600; color: var(--red); font-variant-numeric: tabular-nums; }
.step h3 { font-size: 1.25rem; line-height: 1.75rem; }
.step p { color: var(--muted); }

/* Specs */
.specs__grid { display: grid; grid-template-columns: 1fr 1fr 320px; gap: var(--s-300); align-items: start; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td { padding: var(--s-200) 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.spec-table th { font-weight: 500; color: var(--muted); padding-right: var(--s-200); width: 50%; }
.spec-table td { font-weight: 600; font-variant-numeric: tabular-nums; }
.kit { padding: var(--s-300); border-radius: 24px; background: var(--surface); border: 1px solid var(--line); }
.kit h3 { font-size: 1.125rem; line-height: 1.75rem; margin-bottom: var(--s-200); }
.kit ul { display: grid; gap: var(--s-100); }
.kit li { display: flex; gap: var(--s-100); color: var(--muted); }
.kit .ph { color: var(--ok); font-size: 1.25rem; flex: none; }

/* Audience + safety */
.who { display: grid; grid-template-columns: 7fr 5fr; gap: var(--s-600); align-items: start; }
.who h2 { font-size: 2.25rem; line-height: 2.5rem; margin-bottom: var(--s-400); }
.who__list { display: grid; gap: var(--s-300); }
.who__list li { color: var(--muted); font-size: 1.125rem; line-height: 1.75rem; padding-left: var(--s-300); position: relative; }
.who__list li::before { content: ""; position: absolute; left: 0; top: 11px; width: 8px; height: 8px; border-radius: 2px; background: var(--red); transform: skewX(-12deg); }
.who__list strong { color: var(--text); font-weight: 600; }
.safety { padding: var(--s-400); border-radius: 24px; background: var(--surface); border: 1px solid #5a3a12; }
.safety__icon { font-size: 1.875rem; color: #f5a524; }
.safety h3 { font-size: 1.25rem; line-height: 1.75rem; margin: var(--s-100) 0; }
.safety p { color: var(--muted); }

/* Trust */
.trust { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-200); }
.trust li { display: grid; gap: var(--s-50); padding: var(--s-300); border-radius: 16px; background: var(--surface); border: 1px solid var(--line); }
.trust .ph { font-size: 1.5rem; color: var(--text); margin-bottom: var(--s-75); }
.trust strong { font-size: 1.125rem; line-height: 1.75rem; }
.trust span { color: var(--muted); font-size: 0.875rem; line-height: 1.25rem; }

/* Order form */
.order { display: grid; grid-template-columns: 5fr 7fr; gap: var(--s-600); align-items: start; }
.order__intro { display: grid; gap: var(--s-200); position: sticky; top: 120px; }
.order__intro h2 { font-size: 2.25rem; line-height: 2.5rem; }
.order__intro p { color: var(--muted); font-size: 1.125rem; line-height: 1.75rem; }
.order__price strong { display: block; color: var(--text); font-size: 1.875rem; line-height: 2.25rem; font-variant-numeric: tabular-nums; }
.form { display: grid; gap: var(--s-300); padding: var(--s-400); border-radius: 24px; background: var(--surface-2); border: 1px solid var(--line); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-200); }
.field { display: grid; gap: var(--s-75); border: 0; margin: 0; padding: 0; min-width: 0; }
.field label, .field legend { font-size: 0.875rem; line-height: 1.25rem; font-weight: 600; padding: 0; margin-bottom: var(--s-75); }
.field__opt { font-weight: 400; color: var(--muted); }
.field input, .field textarea {
  width: 100%; padding: var(--s-100) var(--s-200); border-radius: 12px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  font: 400 1rem/1.5rem "Manrope", sans-serif;
  transition: border-color 300ms var(--ease), background-color 300ms var(--ease);
}
.field textarea { resize: vertical; min-height: 96px; }
.field input::placeholder, .field textarea::placeholder { color: #6f6f6c; }
.field input:hover, .field textarea:hover { border-color: #4a4a4a; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--text); }
.field input[aria-invalid="true"] { border-color: var(--err); }
.field__error { color: var(--err); font-size: 0.875rem; line-height: 1.25rem; }
.choices { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-100); }
.choice { position: relative; display: block; cursor: pointer; }
.choice input { position: absolute; opacity: 0; }
.choice span { display: grid; gap: var(--s-25); height: 100%; padding: var(--s-200); border-radius: 12px; border: 1px solid var(--line); background: var(--surface); transition: border-color 300ms var(--ease), background-color 300ms var(--ease); }
.choice small { color: var(--muted); font-size: 0.875rem; line-height: 1.25rem; }
.choice:hover span { border-color: #4a4a4a; }
.choice input:checked + span { border-color: var(--text); background: #2c2c2c; }
.choice input:focus-visible + span { outline: 2px solid var(--red); outline-offset: 3px; }
.check { display: flex; gap: var(--s-100); align-items: flex-start; font-size: 0.875rem; line-height: 1.25rem; color: var(--muted); cursor: pointer; }
.check input { width: 20px; height: 20px; margin: 0; accent-color: var(--red); flex: none; }
.check a { color: var(--text); }
.form__status { padding: var(--s-200); border-radius: 12px; font-size: 0.875rem; line-height: 1.25rem; }
.form__status.is-ok { background: rgb(60 207 122 / 0.1); color: var(--ok); border: 1px solid rgb(60 207 122 / 0.3); }
.form__status.is-err { background: rgb(255 107 107 / 0.1); color: var(--err); border: 1px solid rgb(255 107 107 / 0.3); }

/* FAQ */
.faq__list { display: grid; max-width: 880px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: var(--s-200);
  padding: var(--s-300) 0; cursor: pointer; list-style: none;
  font-size: 1.125rem; line-height: 1.75rem; font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 9999px; background: var(--surface); font-size: 1.25rem; transition: transform 500ms var(--ease), background-color 300ms var(--ease); }
.faq summary:hover::after { background: var(--surface-2); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding-bottom: var(--s-300); color: var(--muted); max-width: 680px; }
.faq details a { color: var(--text); }

/* Final */
.final { padding-block: var(--s-900) 128px; display: grid; justify-items: center; gap: var(--s-400); text-align: center; }
.final__title { font-size: 3.75rem; line-height: 1; letter-spacing: -0.035em; max-width: 680px; background: linear-gradient(90deg, #ffffff, #9b9b9b); -webkit-background-clip: text; background-clip: text; color: transparent; padding-bottom: var(--s-50); }

/* Footer */
.footer { background: var(--bg-deep); border-top: 1px solid var(--line); }
.footer__inner { width: min(100% - 2 * var(--gutter), var(--page)); margin-inline: auto; padding-block: var(--s-600); display: grid; gap: var(--s-300); }
.footer__inner img { width: 140px; }
.footer ul { display: flex; flex-wrap: wrap; gap: var(--s-100) var(--s-300); }
.footer a { color: var(--muted); text-decoration: none; font-size: 0.875rem; line-height: 1.25rem; transition: color 300ms var(--ease); }
.footer a:hover { color: var(--text); }
.footer__small { color: #6f6f6c; font-size: 0.75rem; line-height: 1rem; }

/* Hero buy box */
.buybox { display: grid; gap: var(--s-300); padding-top: var(--s-300); border-top: 1px solid var(--line); }
.buybox__top { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--s-200) var(--s-300); }
.buybox .btn span { text-transform: none; }
.buybox__facts { display: grid; gap: var(--s-100); }
.buybox__facts li { display: flex; gap: var(--s-100); align-items: flex-start; color: var(--muted); font-size: 0.875rem; line-height: 1.25rem; }
.buybox__facts .ph { font-size: 1.25rem; color: var(--text); flex: none; }
.buybox__facts strong { color: var(--text); font-weight: 600; }

/* Anatomy */
.anatomy__grid { display: grid; grid-template-columns: 5fr 7fr; gap: var(--s-400); align-items: start; }
.anatomy__tabs { display: grid; gap: var(--s-75); }
.part {
  display: grid; grid-template-columns: auto 1fr auto; gap: var(--s-200); align-items: start;
  width: 100%; padding: var(--s-300); text-align: left; cursor: pointer;
  border-radius: 16px; border: 1px solid transparent; background: transparent; color: var(--text);
  transition: background-color 500ms var(--ease), border-color 500ms var(--ease);
}
.part:hover { background: var(--surface); }
.part[aria-selected="true"] { background: var(--surface); border-color: var(--line); }
.part__num { font-size: 0.875rem; line-height: 1.25rem; font-weight: 600; color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 2px; transition: color 500ms var(--ease); }
.part[aria-selected="true"] .part__num { color: var(--red); }
.part__body { display: grid; gap: var(--s-75); }
.part__body strong { font-size: 1.25rem; line-height: 1.75rem; font-weight: 600; }
.part__text {
  color: var(--muted); max-height: 0; overflow: hidden; opacity: 0;
  transition: max-height 700ms var(--ease), opacity 500ms var(--ease);
}
.part[aria-selected="true"] .part__text { max-height: 200px; opacity: 1; }
.part__stat { font-size: 0.875rem; line-height: 1.25rem; font-weight: 600; color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; padding-top: 4px; }
.part[aria-selected="true"] .part__stat { color: var(--text); }
.anatomy__stage { position: sticky; top: 112px; border-radius: 24px; overflow: hidden; background: var(--bg-deep); border: 1px solid var(--line); }
.anatomy__stage .stage__canvas { cursor: default; }

/* Product sheet link */
.kit__sheet { display: flex; gap: var(--s-100); align-items: flex-start; margin-top: var(--s-300); padding: var(--s-200); border-radius: 12px; background: var(--surface-2); text-decoration: none; transition: background-color 300ms var(--ease); }
.kit__sheet:hover { background: #313131; }
.kit__sheet .ph { font-size: 1.5rem; color: var(--red); flex: none; }
.kit__sheet span { display: grid; gap: var(--s-25); }
.kit__sheet small { color: var(--muted); font-size: 0.875rem; line-height: 1.25rem; }

/* Sticky buy bar */
.buybar {
  position: fixed; left: 50%; bottom: var(--s-300); z-index: 45;
  display: flex; align-items: center; gap: var(--s-200);
  padding: var(--s-75) var(--s-75) var(--s-75) var(--s-200);
  border-radius: 9999px; border: 1px solid rgb(255 255 255 / 0.08);
  background: rgb(24 24 24 / 0.82); backdrop-filter: blur(20px) saturate(140%); -webkit-backdrop-filter: blur(20px) saturate(140%);
  transform: translate(-50%, 160%); opacity: 0;
  transition: transform 700ms var(--ease), opacity 500ms var(--ease);
}
.buybar.is-shown { transform: translate(-50%, 0); opacity: 1; }
.buybar__dot { width: 16px; height: 16px; border-radius: 9999px; background: var(--c, #d40d17); box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.32); flex: none; transition: background-color 500ms var(--ease); }
.buybar__name { display: grid; font-size: 0.875rem; line-height: 1.25rem; white-space: nowrap; }
.buybar__name small { color: var(--muted); font-size: 0.75rem; line-height: 1rem; }

@media (max-width: 1080px) {
  .anatomy__grid { grid-template-columns: 1fr; }
  .anatomy__stage { position: relative; top: 0; order: -1; }
}
@media (max-width: 600px) {
  .part { padding: var(--s-200); gap: var(--s-100); }
  .buybar { left: var(--s-200); right: var(--s-200); bottom: var(--s-200); transform: translateY(160%); }
  .buybar.is-shown { transform: none; }
  .buybar__name { flex: 1; min-width: 0; }
  .buybar__name strong { overflow: hidden; text-overflow: ellipsis; }
}
@media (prefers-reduced-motion: reduce) {
  .buybar, .part__text { transition: none; }
}

/* Responsive */
@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; padding-top: 140px; min-height: auto; }
  .hero__title { font-size: 3rem; }
  .specs__grid { grid-template-columns: 1fr 1fr; }
  .kit { grid-column: 1 / -1; }
  .order { grid-template-columns: 1fr; }
  .order__intro { position: static; }
}
@media (max-width: 860px) {
  .island__links, .island__cta { display: none; }
  .burger { display: block; }
  .island { gap: var(--s-400); padding-left: var(--s-200); }
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: var(--s-400) var(--s-300); }
  .benefits, .steps, .trust { grid-template-columns: 1fr; }
  .benefit--wide { grid-column: auto; }
  .who { grid-template-columns: 1fr; }
  .tagline { padding-block: var(--s-900); }
  .tagline__text { font-size: 2.25rem; line-height: 2.5rem; }
}
@media (max-width: 600px) {
  :root { --gutter: var(--s-200); }
  .hero__title, .final__title { font-size: 2.25rem; line-height: 2.5rem; }
  .section { padding-block: var(--s-800); }
  .section__head h2, .who h2, .order__intro h2 { font-size: 1.875rem; line-height: 2.25rem; }
  .stat dd { font-size: 3rem; }
  .specs__grid, .form__row, .choices { grid-template-columns: 1fr; }
  .form { padding: var(--s-300); }
  .stage { border-radius: 16px; }
  .stage__canvas { aspect-ratio: 1 / 1; }
  .stage__bar { padding: var(--s-200); }
  .swatches__label { float: none; width: 100%; margin: 0 0 var(--s-75); }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  .tagline__text .w { transition: none; }
  .stage__skeleton span { animation: none; }
}

/* ---------- Shop integration (PrestaShop) ---------- */
.notice {
  pointer-events: auto;
  display: flex; align-items: center; justify-content: center; gap: var(--s-75);
  width: 100vw; margin: 0 calc(-1 * var(--s-200));
  padding: 6px var(--s-200);
  font-size: 0.8125rem; line-height: 1.125rem; color: var(--muted); text-align: center;
  background: rgb(0 0 0 / 0.78); border-bottom: 1px solid rgb(255 255 255 / 0.06);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.notice strong { color: var(--text); font-weight: 600; }
.notice__dot { flex: none; width: 8px; height: 8px; border-radius: 50%; background: #f5b400; box-shadow: 0 0 0 3px rgb(245 180 0 / 0.18); }
.nav-wrap .island { margin-top: var(--s-100); }

.island__cart { position: relative; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 9999px; color: var(--text); font-size: 1.25rem; transition: background-color 300ms var(--ease); }
.island__cart:hover { background: rgb(255 255 255 / 0.08); }
.island__count { position: absolute; top: 2px; right: 0; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9999px; background: var(--red); color: #fff; font-size: 0.6875rem; line-height: 18px; font-weight: 700; text-align: center; font-variant-numeric: tabular-nums; }

.field__legend { font-size: 0.875rem; line-height: 1.25rem; font-weight: 600; margin: 0 0 var(--s-75); }
.choices--info .choice { cursor: default; }
.choices--info .choice:hover span { border-color: var(--line); }
.form__note { margin: 0; font-size: 0.8125rem; line-height: 1.25rem; color: var(--muted); text-align: center; }
.form__note a, .form__status a, .footer__small a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.form__status.is-err a { color: var(--text); }

@media (max-width: 600px) {
  .notice { font-size: 0.75rem; line-height: 1rem; }
}