/* Layout only: colors, typography and geometry use the shared theme tokens. */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--font-base); line-height: 1.65; }
::selection { background: var(--acc); color: var(--bg); }
a { color: inherit; text-underline-offset: .25em; }
a, button { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--acc); outline-offset: 5px; }
button { font: inherit; }
svg { flex-shrink: 0; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3, h4 { text-wrap: balance; }
.container { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
.display { font-family: var(--font-display); font-weight: var(--font-display-weight); font-style: var(--font-display-style); text-transform: var(--font-display-transform); letter-spacing: -.035em; line-height: 1.08; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 100; padding: 12px 18px; background: var(--surf); transform: translateY(-200%); }
.skip-link:focus { transform: none; }
.site-header { position: sticky; top: 0; z-index: 50; background: var(--bg); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 750; letter-spacing: .18em; font-size: 16px; }
.brand img { object-fit: contain; }
.navlinks { display: flex; gap: 26px; }
.navlinks a, .header-login { font-size: 14px; text-decoration: none; padding-block: 12px; }
.navlinks a { color: var(--fg2); }
.navlinks a:hover, .site-footer a:hover { color: var(--fg); }
.header-login { border-bottom: 1px solid var(--acc); white-space: nowrap; }
.hero { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 64px; padding-block: 100px 96px; align-items: center; }
.hero h1 { font-size: clamp(44px, 5.3vw, 72px); }
.hero h1 span { color: var(--acc); }
.hero-lead { margin-top: 28px; max-width: 54ch; font-size: 18px; color: var(--fg-soft); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 32px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 14px; min-height: 52px; padding: 14px 22px; font-weight: 650; text-decoration: none; border-radius: var(--r-md); transition: background .18s ease; }
.primary { background: var(--acc); color: var(--bg); }
.primary:hover { background: var(--acc-deep); }
.text-link { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; font-size: 14px; font-weight: 600; text-decoration: none; }
.text-link:hover { text-decoration: underline; }
.text-link svg { color: var(--acc); }
.hero-note { margin-top: 24px; font-size: 13px; color: var(--fg2); }
.brand-picker { padding: 30px; background: var(--surf); border-radius: var(--r-lg); }
.brand-picker h2 { font-size: 18px; font-weight: 600; margin-bottom: 12px; }
.brand-picker > a { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.brand-picker > a:last-of-type { border-bottom: none; }
.brand-picker strong { display: block; font-size: 24px; font-weight: 650; }
.brand-picker small { display: block; font-size: 12px; color: var(--fg2); margin-top: 3px; }
.brand-picker > a > svg { color: var(--acc); transition: transform .18s ease; }
.brand-picker > a:hover > svg { transform: translateX(4px); }
.brand-picker > p { padding-top: 18px; border-top: 1px solid var(--line); font-size: 12px; color: var(--fg2); }
.section { padding-block: 80px; }
/* The background returns to the page color at both edges: adjacent sections
   share a continuous surface, without overlapping content or intercepting clicks. */
.section-alt {
  background: linear-gradient(180deg, var(--bg), var(--bg-alt) 96px, var(--bg-alt) calc(100% - 96px), var(--bg));
}
.section-heading, .final-cta > h2 { position: relative; }
.section-heading::before, .final-cta > h2::before {
  content: ""; position: absolute; top: -24px; left: 0; width: 72px; height: 1px;
  background: linear-gradient(90deg, var(--acc), transparent); pointer-events: none;
}
.final-cta > h2::before { left: calc(50% - 36px); }
@media (max-width: 760px) {
  .section-alt { background: linear-gradient(180deg, var(--bg), var(--bg-alt) 64px, var(--bg-alt) calc(100% - 64px), var(--bg)); }
}
.section-heading { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: end; margin-bottom: 44px; }
.section-heading h2, .faq-layout > h2, .final-cta h2 { font-size: clamp(30px, 3.5vw, 44px); }
.section-heading > p { color: var(--fg2); max-width: 57ch; }
.feature-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
.feature-list article { padding-top: 22px; border-top: 1px solid var(--line2); }
.feature-list h3, .steps h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; }
.feature-list p, .steps p { color: var(--fg2); font-size: 15px; }
.model-row { display: grid; grid-template-columns: 160px minmax(0, 1fr) auto; gap: 32px; align-items: start; padding-block: 32px; border-top: 1px solid var(--line); }
.model-row h3 { font-size: 26px; font-weight: 650; }
.model-row h4 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.model-row p { font-size: 15px; color: var(--fg2); max-width: 68ch; }
.model-row .model-note { margin-top: 12px; font-size: 13px; }
.model-row .text-link { white-space: nowrap; }
.catalog-help { padding-top: 28px; border-top: 1px solid var(--line); font-size: 14px; color: var(--fg2); }
.catalog-help a { display: inline-flex; align-items: center; gap: 8px; color: var(--fg); min-height: 44px; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; list-style: none; padding: 0; margin: 0; counter-reset: installation; }
.steps li { counter-increment: installation; }
.steps li::before { content: counter(installation); display: block; color: var(--acc); font-size: 30px; font-weight: 650; margin-bottom: 18px; }
.need { display: grid; grid-template-columns: 1fr 2fr; gap: 32px; padding-top: 32px; margin-top: 44px; border-top: 1px solid var(--line); }
.need h3 { font-size: 24px; }
.need p { font-size: 15px; color: var(--fg2); margin-bottom: 8px; }
.need strong { color: var(--fg); font-weight: 500; }
.need a { margin-top: 12px; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.price-card { display: flex; flex-direction: column; padding: 28px; border: 1px solid var(--line2); border-radius: var(--r-lg); }
.price-card h3 { font-size: 28px; }
.price-card .price-summary { color: var(--fg); font-size: 16px; margin-top: 8px; }
.price-card > p { color: var(--fg2); font-size: 14px; margin-top: 18px; }
.price-card > a { margin-top: auto; padding-top: 24px; }
.pricing-bottom { margin-top: 30px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.pricing-bottom p { color: var(--fg2); font-size: 14px; }
.pricing-bottom .button { flex-shrink: 0; }
.faq-layout { display: grid; grid-template-columns: 1fr 2fr; gap: 64px; }
.faq { border-bottom: 1px solid var(--line); }
.faq h3 { font-weight: 500; }
.faq button { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; border: none; background: transparent; color: var(--fg); padding: 22px 0; text-align: left; cursor: pointer; font-size: 17px; }
.faq:first-child button { padding-top: 0; }
.faq button:hover { color: var(--acc-br); }
.faq button span { display: inline-flex; flex-shrink: 0; transition: transform .2s ease; }
.faq-answer { display: grid; grid-template-rows: 1fr; transition: grid-template-rows .2s ease; }
.faq-answer > div { min-height: 0; overflow: hidden; }
.faq-answer p { padding-bottom: 24px; color: var(--fg2); font-size: 15px; max-width: 70ch; }
.final-cta { text-align: center; padding-block: 92px; }
.final-cta p { margin-block: 24px; color: var(--fg2); }
.site-footer { border-top: 1px solid var(--line); padding-block: 36px 44px; }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 12px 24px; }
.site-footer nav a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; color: var(--fg2); font-size: 13px; }
.site-footer p { font-size: 12px; color: var(--fg2); margin-top: 6px; }
.page-transition { position: fixed; inset: 0; z-index: 9999; background: var(--bg); opacity: 0; pointer-events: none; transition: opacity .2s ease; }
.page-transition.active { opacity: 1; pointer-events: all; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--line2); border-radius: var(--r-xs); }
@media (max-width: 1000px) {
  .navlinks { gap: 16px; }
  .hero { gap: 36px; padding-block: 64px; }
  .section-heading { gap: 36px; }
  .model-row { grid-template-columns: 130px minmax(0, 1fr); gap: 20px; }
  .model-row > a { grid-column: 2; }
  .faq-layout { grid-template-columns: 1fr 2fr; gap: 32px; }
}
@media (max-width: 760px) {
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 68px; gap: 16px; }
  .brand { font-size: 14px; gap: 8px; }
  .brand img { width: 28px; height: 28px; }
  .header-login { font-size: 13px; }
  .navlinks { display: none; }
  .hero { grid-template-columns: 1fr; gap: 36px; padding-block: 52px; }
  .hero h1 { font-size: clamp(40px, 8vw, 60px); }
  .hero-lead { font-size: 17px; margin-top: 24px; }
  .actions { gap: 10px 22px; margin-top: 24px; }
  .hero-note { font-size: 12px; margin-top: 16px; }
  .brand-picker { padding: 24px; }
  .brand-picker > a { padding-block: 14px; }
  .brand-picker strong { font-size: 22px; }
  .section { padding-block: 52px; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; margin-bottom: 30px; }
  .section-heading h2 br { display: none; }
  .section-heading p { font-size: 15px; }
  .feature-list, .steps, .pricing-grid { grid-template-columns: 1fr; gap: 24px; }
  .feature-list article { padding-top: 20px; }
  .steps li::before { margin-bottom: 6px; }
  .model-row { grid-template-columns: 1fr; gap: 14px; padding-block: 26px; }
  .model-row > a { grid-column: auto; justify-self: start; }
  .model-row h3 { font-size: 24px; }
  .need { grid-template-columns: 1fr; gap: 20px; }
  .pricing-bottom { flex-direction: column; align-items: start; gap: 20px; }
  .price-card { padding: 24px; }
  .faq-layout { grid-template-columns: 1fr; gap: 32px; }
  .faq button { font-size: 16px; }
  .footer-top { align-items: start; flex-direction: column; gap: 16px; }
}
@media (max-width: 360px) {
  .container { width: calc(100% - 32px); }
  .brand { letter-spacing: .1em; font-size: 13px; }
  .header-login { font-size: 12px; }
  .hero h1 { font-size: 36px; }
  .button { padding-inline: 18px; font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* Navigation works without JavaScript; motion only enhances the visible page. */
.mobile-menu { display: none; }
summary:focus-visible { outline: 2px solid var(--acc); outline-offset: 5px; }
.brand-picker [aria-current="true"] strong { color: var(--acc); }
.hero { position: relative; isolation: isolate; }
.hero::before { content: ""; position: absolute; z-index: -1; pointer-events: none; inset: 0; background: radial-gradient(ellipse at 72% 40%, rgba(var(--acc-rgb), .12), transparent 65%); }
.steps { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.steps li { position: relative; padding-top: 18px; border-top: 1px solid var(--line2); }
.steps li::after { content: ""; position: absolute; top: -1px; left: 0; width: 40%; height: 1px; background: linear-gradient(90deg, var(--acc), transparent); }
.button svg, .text-link svg { transition: transform .25s ease; }
.button:hover svg, .text-link:hover svg { transform: translateX(4px); }
.price-card { position: relative; overflow: hidden; transition: border-color .3s ease, background .3s ease; }
.price-card:hover, .price-card:focus-within { border-color: var(--acc); background: var(--surf); }
@media (prefers-reduced-motion: no-preference) {
  .hero::before { animation: hero-light 7s ease-in-out 2 alternate; }
  @keyframes hero-light { from { opacity: .35; transform: translateY(12px); } to { opacity: 1; transform: translateY(-12px); } }
  .mobile-menu[open] nav { animation: menu-enter .22s ease-out; }
  @keyframes menu-enter { from { opacity: .5; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
}
@media (max-width: 1000px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 760px) {
  .header-login { display: none; }
  .mobile-menu { display: block; }
  .mobile-menu summary { display: flex; align-items: center; gap: 12px; min-height: 44px; cursor: pointer; list-style: none; font-size: 14px; }
  .mobile-menu summary::-webkit-details-marker { display: none; }
  .mobile-menu summary span { font-size: 24px; transition: transform .2s ease; }
  .mobile-menu[open] summary span { transform: rotate(45deg); }
  .mobile-menu nav { position: absolute; left: 0; right: 0; top: 100%; padding: 16px 20px 24px; background: var(--bg); border-bottom: 1px solid var(--line2); box-shadow: var(--shadow-lift); max-height: calc(100dvh - 68px); overflow-y: auto; }
  .mobile-menu nav a { display: flex; align-items: center; min-height: 48px; padding: 8px 12px; text-decoration: none; border-bottom: 1px solid var(--line); }
  .mobile-menu nav a:hover { color: var(--acc); }
  .steps { grid-template-columns: 1fr; }
}