/* ============================================================
   FabriconLab — EyesUp™ Rider Navigation Dock
   Design system: Space Grotesk (display) · Inter (body)
   IBM Plex Mono (numbered labels) · Orange #F26B1E on
   graphite #1B2027 and light grey #F2F3F5
   ============================================================ */

@font-face{font-family:'Space Grotesk';src:url('fonts/SpaceGrotesk-Medium.woff2') format('woff2');font-weight:500;font-display:swap}
@font-face{font-family:'Space Grotesk';src:url('fonts/SpaceGrotesk-SemiBold.woff2') format('woff2');font-weight:600;font-display:swap}
@font-face{font-family:'Space Grotesk';src:url('fonts/SpaceGrotesk-Bold.woff2') format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:'Inter';src:url('fonts/Inter-Regular.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'Inter';src:url('fonts/Inter-Medium.woff2') format('woff2');font-weight:500;font-display:swap}
@font-face{font-family:'Inter';src:url('fonts/Inter-SemiBold.woff2') format('woff2');font-weight:600;font-display:swap}
@font-face{font-family:'Inter';src:url('fonts/Inter-Bold.woff2') format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('fonts/IBMPlexMono-Regular.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('fonts/IBMPlexMono-Medium.woff2') format('woff2');font-weight:500;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url('fonts/IBMPlexMono-SemiBold.woff2') format('woff2');font-weight:600;font-display:swap}

:root{
  --orange:#F26B1E;
  --orange-deep:#DC3A16;
  --orange-light:#F9A52E;
  --graphite:#1B2027;
  --graphite-2:#232A33;
  --grey:#F2F3F5;
  --grey-2:#E7E9EC;
  --ink:#1B2027;
  --ink-soft:#4A525D;
  --ink-muted:#7A828D;
  --on-dark:#F2F3F5;
  --on-dark-soft:#AEB6C0;
  --line:#DDE1E6;
  --line-dark:#313945;
  --display:'Space Grotesk',system-ui,sans-serif;
  --body:'Inter',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --wide:1160px;
  --text:760px;
  --r:14px;
  --shadow:0 14px 40px rgba(27,32,39,.10),0 4px 12px rgba(27,32,39,.06);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--body);font-size:17px;line-height:1.65;color:var(--ink);background:var(--grey);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--orange);text-decoration:none}
a:hover{color:var(--orange-deep)}

.wrap{max-width:var(--wide);margin:0 auto;padding:0 24px}
.text-wrap{max-width:var(--text)}

/* ---------- type ---------- */
h1,h2,h3{font-family:var(--display);line-height:1.08;letter-spacing:-0.015em;font-weight:700}
h1{font-size:clamp(2.5rem,6.2vw,4.4rem)}
h2{font-size:clamp(1.9rem,4vw,2.9rem);margin-bottom:20px}
h3{font-size:1.25rem;font-weight:600;line-height:1.3}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--ink-soft);line-height:1.6}
.on-dark .lead,.on-dark p{color:var(--on-dark-soft)}
.on-dark h1,.on-dark h2,.on-dark h3{color:var(--on-dark)}

/* mono section labels: orange number + spaced uppercase + rule */
.sec-label{display:flex;align-items:center;gap:14px;margin-bottom:26px;font-family:var(--mono);font-size:.8rem;letter-spacing:.28em;text-transform:uppercase;color:var(--ink-soft)}
.sec-label .num{color:var(--orange);font-weight:600;letter-spacing:.1em}
.sec-label::after{content:"";flex:1;height:1px;background:var(--orange);opacity:.45}
.on-dark .sec-label{color:var(--on-dark-soft)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--display);font-weight:600;font-size:.95rem;letter-spacing:.02em;padding:15px 30px;border-radius:999px;transition:transform .15s ease,background .2s ease,color .2s ease;cursor:pointer;border:0}
.btn-primary{background:linear-gradient(100deg,var(--orange-deep),var(--orange) 55%,var(--orange-light));color:#fff}
.btn-primary:hover{transform:translateY(-1px);color:#fff;filter:saturate(1.08)}
.btn-ghost{border:1.5px solid var(--orange);color:var(--orange);background:transparent}
.btn-ghost:hover{background:var(--orange);color:#fff}
.btn-ghost-dark{border:1.5px solid var(--line-dark);color:var(--on-dark);background:transparent}
.btn-ghost-dark:hover{border-color:var(--orange);color:var(--orange)}

/* ---------- nav ---------- */
header.site{position:sticky;top:0;z-index:50;background:rgba(27,32,39,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-dark)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.nav .brand img{height:26px;width:auto}
.nav nav{display:flex;align-items:center;gap:30px}
.nav nav a{font-family:var(--display);font-weight:500;font-size:.92rem;color:var(--on-dark-soft)}
.nav nav a:hover{color:#fff}
.nav .btn{padding:10px 22px;font-size:.85rem}
.nav-toggle{display:none;background:none;border:0;color:var(--on-dark);font-size:1.6rem;cursor:pointer}

/* ---------- hero ---------- */
.hero{background:radial-gradient(1200px 700px at 75% 10%,#2A3340 0%,var(--graphite) 55%);color:var(--on-dark);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:84px 0 72px}
.eyebrow{font-family:var(--mono);font-size:.78rem;letter-spacing:.3em;text-transform:uppercase;color:var(--orange-light);margin-bottom:22px}
.hero h1 .hl{background:linear-gradient(100deg,var(--orange-light),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{margin:24px 0 34px;max-width:34rem}
.hero-ctas{display:flex;gap:16px;flex-wrap:wrap}
.hero-fig{position:relative}
.hero-fig .panel{background:var(--grey);border-radius:22px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.45)}
.hero-fig .tag{position:absolute;left:18px;bottom:18px;background:rgba(27,32,39,.85);color:var(--on-dark);font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;padding:8px 14px;border-radius:8px}
.hero-stats{display:flex;gap:0;border-top:1px solid var(--line-dark)}
.hero-stats div{flex:1;padding:22px 8px;text-align:center}
.hero-stats div+div{border-left:1px solid var(--line-dark)}
.hero-stats b{display:block;font-family:var(--display);font-size:1.35rem;color:#fff}
.hero-stats span{font-size:.8rem;color:var(--on-dark-soft)}

/* ---------- sections ---------- */
section{padding:96px 0}
section.tight{padding:72px 0}
.on-dark{background:var(--graphite);color:var(--on-dark)}

/* scroll sequence */
.seq{background:var(--grey)}
.seq-stage{position:relative}
.seq-sticky{position:sticky;top:72px;height:calc(100vh - 72px);display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.seq-imgs{position:relative;height:min(74vh,640px)}
.seq-imgs img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:0;transition:opacity .25s ease}
.seq-imgs img.active{opacity:1}
.seq-copy h2{margin-bottom:14px}
.seq-caption{font-family:var(--mono);font-size:.8rem;letter-spacing:.2em;text-transform:uppercase;color:var(--orange);min-height:1.4em;margin-top:18px}
.seq-track{height:320vh}

/* comparison */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:44px}
.compare .card{border-radius:var(--r);padding:36px}
.compare .bad{background:var(--grey-2);border:1px solid var(--line)}
.compare .good{background:var(--graphite);color:var(--on-dark)}
.compare h3{margin-bottom:18px;display:flex;align-items:center;gap:10px}
.on-dark .compare .bad h3{color:var(--ink)}
.compare ul{list-style:none}
.compare li{padding:9px 0 9px 32px;position:relative;font-size:.98rem}
.bad li{color:var(--ink-soft)}
.good li{color:var(--on-dark-soft)}
.bad li::before{content:"✕";position:absolute;left:0;color:#B0522F;font-weight:700}
.good li::before{content:"✓";position:absolute;left:0;color:var(--orange-light);font-weight:700}

/* numbered steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:48px}
.step{background:#fff;border-radius:var(--r);padding:34px 30px;box-shadow:var(--shadow)}
.step .n{font-family:var(--mono);font-weight:600;color:var(--orange);font-size:.9rem;letter-spacing:.1em}
.step h3{margin:12px 0 10px}
.step p{font-size:.97rem;color:var(--ink-soft)}

/* specs grid (dark) */
.specs{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-dark);border:1px solid var(--line-dark);border-radius:var(--r);overflow:hidden;margin-top:48px}
.spec{background:var(--graphite-2);padding:32px 28px}
.spec .k{font-family:var(--mono);font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;color:var(--orange-light);margin-bottom:12px}
.spec p{font-size:.95rem;color:var(--on-dark-soft)}
.spec b{color:var(--on-dark);font-weight:600}

/* gallery band */
.band{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:44px}
.band figure{border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);margin:0}
.band img{width:100%;height:100%;object-fit:cover;aspect-ratio:21/9}
.band figcaption{display:none}

/* detail trio */
.trio{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.trio figure{margin:0;background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.trio img{aspect-ratio:4/5;object-fit:cover;width:100%}
.trio figcaption{padding:16px 20px;font-size:.88rem;color:var(--ink-soft)}
.trio figcaption b{display:block;font-family:var(--display);color:var(--ink);font-size:.98rem;margin-bottom:2px}

/* faq */
.faq{max-width:var(--text);margin:40px auto 0}
.faq details{border-bottom:1px solid var(--line);padding:6px 0}
.faq summary{font-family:var(--display);font-weight:600;font-size:1.05rem;padding:16px 36px 16px 0;cursor:pointer;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);color:var(--orange);font-size:1.4rem;font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 0 20px;color:var(--ink-soft);font-size:.98rem}

/* cta band */
.cta-band{background:linear-gradient(110deg,var(--orange-deep),var(--orange) 50%,var(--orange-light));color:#fff;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.9);max-width:36rem;margin:0 auto 34px}
.cta-band .btn{background:var(--graphite);color:#fff}
.cta-band .btn:hover{background:#10141a;color:#fff}
.cta-contacts{margin-top:28px;font-size:.95rem;color:rgba(255,255,255,.95)}
.cta-contacts a{color:#fff;text-decoration:underline;text-underline-offset:3px}

/* footer */
footer.site{background:var(--graphite);color:var(--on-dark-soft);padding:64px 0 40px;font-size:.9rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:40px}
.foot-grid img{height:24px;margin-bottom:16px}
footer .k{font-family:var(--mono);font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;color:var(--on-dark);margin-bottom:14px}
footer ul{list-style:none}
footer li{margin-bottom:9px}
footer a{color:var(--on-dark-soft)}
footer a:hover{color:#fff}
.foot-legal{border-top:1px solid var(--line-dark);padding-top:24px;font-size:.8rem;color:#77808C}

/* ---------- guide page ---------- */
.guide-hero{background:var(--graphite);color:var(--on-dark);padding:64px 0}
.batch-chip{display:inline-flex;align-items:center;gap:10px;background:var(--graphite-2);border:1px solid var(--line-dark);border-radius:999px;padding:10px 20px;font-family:var(--mono);font-size:.82rem;letter-spacing:.1em;color:var(--on-dark);margin-top:22px}
.batch-chip b{color:var(--orange-light)}
.quick{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.quick a{background:var(--graphite-2);border:1px solid var(--line-dark);border-radius:var(--r);padding:20px 22px;color:var(--on-dark);font-family:var(--display);font-weight:600}
.quick a span{display:block;font-family:var(--body);font-weight:400;font-size:.85rem;color:var(--on-dark-soft);margin-top:4px}
.quick a:hover{border-color:var(--orange)}

.dodont{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:40px}
.dodont .card{border-radius:var(--r);padding:34px}
.dodont .do{background:#fff;box-shadow:var(--shadow)}
.dodont .dont{background:var(--graphite);color:var(--on-dark)}
.dodont h3{margin-bottom:16px}
.on-dark .dodont .do h3{color:var(--ink)}
.dodont ul{list-style:none}
.dodont li{padding:8px 0 8px 32px;position:relative;font-size:.96rem}
.do li{color:var(--ink-soft)}
.dont li{color:var(--on-dark-soft)}
.do li::before{content:"✓";position:absolute;left:0;color:var(--orange);font-weight:700}
.dont li::before{content:"✕";position:absolute;left:0;color:var(--orange-light);font-weight:700}

.install-steps{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;margin-top:44px}
.install-steps figure{margin:0;background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.install-steps img{aspect-ratio:4/5;object-fit:cover;width:100%}
.install-steps figcaption{padding:20px 24px;font-size:.93rem;color:var(--ink-soft)}
.install-steps .n{font-family:var(--mono);font-weight:600;color:var(--orange);font-size:.82rem;letter-spacing:.1em}
.install-steps b{display:block;font-family:var(--display);color:var(--ink);margin:6px 0 4px}

.warranty-table{width:100%;border-collapse:collapse;margin-top:32px;font-size:.95rem;background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.warranty-table th{font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;text-align:left;background:var(--graphite);color:var(--on-dark);padding:16px 22px}
.warranty-table td{padding:16px 22px;border-top:1px solid var(--line);color:var(--ink-soft);vertical-align:top}
.warranty-table td:first-child{color:var(--ink);font-weight:500}

.report{background:var(--graphite);border-radius:20px;color:var(--on-dark);padding:48px;margin-top:48px}
.report h2{margin-bottom:12px}
.report .btns{display:flex;gap:16px;flex-wrap:wrap;margin-top:28px}
.notice{background:#FFF4EC;border:1px solid #F5C9A8;border-radius:var(--r);padding:20px 24px;font-size:.93rem;color:#7A4A22;margin-top:28px}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;padding:56px 0 48px}
  .seq-sticky{grid-template-columns:1fr;gap:16px}
  .seq-imgs{height:52vh}
  .steps,.trio,.specs,.quick{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  section{padding:64px 0}
  .nav nav{display:none}
  .nav nav.open{display:flex;position:absolute;top:72px;left:0;right:0;background:var(--graphite);flex-direction:column;padding:24px;gap:20px;border-bottom:1px solid var(--line-dark)}
  .nav-toggle{display:block}
  .compare,.steps,.band,.trio,.specs,.dodont,.install-steps,.quick{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .band img{aspect-ratio:16/9}
  .report{padding:32px 24px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .seq-imgs img{transition:none}
}