/* SplitBridge landing page. Plain CSS, mobile-first. Colors are tokens on :root; dark mode swaps them. */
:root{
  --bg:#f6fafa; --surface:#ffffff; --band:#eaf3f3; --ink:#0f2629; --mute:#4a6165; --line:#d8e5e6; --line-strong:#7d9699;
  --accent:#0a6d77; --accent-hover:#085a62; --on-accent:#ffffff; --accent-ink:#09636c; --accent-soft:#dcefef;
  --focus:#0a6d77; --err:#b3261e; --shadow:0 1px 2px rgba(15,38,41,.05),0 10px 30px rgba(15,38,41,.07);
  --render-1:#e8f4f4; --render-2:#c9e3e4; --render-shadow:rgba(15,38,41,.16);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]){
    --bg:#0b1618; --surface:#102125; --band:#0e1c1f; --ink:#e4efef; --mute:#9db3b6; --line:#21393d; --line-strong:#5d7a7e;
    --accent:#46c7cb; --accent-hover:#6fd6d8; --on-accent:#032326; --accent-ink:#6fd6d8; --accent-soft:#12363a;
    --focus:#7fe0e3; --err:#ff8a80; --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.3);
    --render-1:#17363b; --render-2:#0d2125; --render-shadow:rgba(0,0,0,.5);
    color-scheme:dark;
  }
}
:root[data-theme=dark]{
  --bg:#0b1618; --surface:#102125; --band:#0e1c1f; --ink:#e4efef; --mute:#9db3b6; --line:#21393d; --line-strong:#5d7a7e;
  --accent:#46c7cb; --accent-hover:#6fd6d8; --on-accent:#032326; --accent-ink:#6fd6d8; --accent-soft:#12363a;
  --focus:#7fe0e3; --err:#ff8a80; --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.3);
  --render-1:#17363b; --render-2:#0d2125; --render-shadow:rgba(0,0,0,.5);
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.55 var(--font);-webkit-font-smoothing:antialiased;overflow-wrap:break-word}
a{color:var(--accent-ink);text-underline-offset:3px}
h1,h2,h3{line-height:1.12;letter-spacing:-.015em;margin:0 0 .45em;color:var(--ink);text-wrap:balance}
h1{font-size:clamp(2.2rem,8.5vw,3.7rem);font-weight:800}
h2{font-size:clamp(1.6rem,5.5vw,2.3rem);font-weight:750}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 1em}
sup{line-height:0}
sup a{text-decoration:none;padding:0 2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
.narrow{max-width:740px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-9999px;top:8px;z-index:10;background:var(--surface);padding:8px 14px;border-radius:8px}
.skip:focus{left:16px}
.lede{font-size:1.1rem;color:var(--mute)}
.fine{font-size:.86rem;color:var(--mute);margin:12px 0 0;line-height:1.45}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:750;font-size:1.12rem;letter-spacing:-.01em}
.logo-bg{fill:var(--accent)}.logo-dev{fill:var(--on-accent)}.logo-led{fill:#22c3a6}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 24px;border-radius:999px;border:2px solid var(--accent);
  font:inherit;font-size:1.02rem;font-weight:650;line-height:1.15;text-align:center;text-decoration:none;cursor:pointer;transition:background .15s,border-color .15s,transform .15s}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);color:var(--on-accent)}
.btn.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}
.btn.secondary{background:transparent;color:var(--accent-ink)}
.btn.secondary:hover{background:var(--accent-soft)}
.btn.sm{min-height:42px;padding:0 16px;font-size:.92rem}
.btn[disabled]{opacity:.6;cursor:progress}

/* sections */
section{padding:56px 0}
.band{background:var(--band)}

/* hero */
.hero{padding:12px 0 56px}
.hero-grid{display:grid;gap:32px}
.eyebrow{font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-ink);margin:0 0 14px}
.hero h1 span{color:var(--accent-ink)}
.sub{font-size:1.15rem;color:var(--mute);max-width:34em}
.price{font-size:1.15rem;margin:22px 0 18px}
.price b{color:var(--accent-ink);font-weight:750}
.ctas{display:flex;flex-wrap:wrap;gap:12px}
.ctas .btn{flex:1 1 100%}
.render{position:relative;margin:0;aspect-ratio:16/10;border-radius:22px;overflow:hidden;border:1px solid var(--line);
  background:radial-gradient(120% 100% at 30% 15%,var(--render-1),var(--render-2))}
.render svg,.render img,.render picture{display:block;width:100%;height:100%;object-fit:cover}
.render figcaption{position:absolute;left:12px;bottom:10px;font-size:.74rem;color:var(--mute);background:var(--surface);padding:3px 9px;border-radius:999px;opacity:.92}
.r-shadow{fill:var(--render-shadow)}
.r-cable{fill:none;stroke:#3a4a4d;stroke-width:9;stroke-linecap:round}
.r-relief{fill:#3a4a4d}
.r-plug{fill:#f3efe4;stroke:#c9c1ad;stroke-width:1.5}
.r-pin{fill:#5b5547}
.r-body{stroke:#c3d3d4;stroke-width:2}
.st-top{stop-color:#fbfdfd}.st-bot{stop-color:#dbe5e6}
.r-gloss{fill:#fff;opacity:.6}
.r-seam{stroke:#c3d3d4;stroke-width:1.5}
.r-word{font:600 22px var(--font);fill:#9fb1b3;letter-spacing:.01em}
.r-hole{fill:#b3c4c6}
.r-led{fill:#22c3a6}.st-led{stop-color:#22c3a6}

/* how it works */
.steps{list-style:none;margin:0;padding:0;display:grid;gap:14px;counter-reset:step}
.steps li{counter-increment:step;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px}
.steps li::before{content:counter(step);display:grid;place-items:center;width:38px;height:38px;border-radius:50%;margin-bottom:12px;
  background:var(--accent-soft);color:var(--accent-ink);font-weight:800}
.steps p{margin:0;color:var(--mute);font-size:1rem}

/* comparison */
.cmp{width:100%;table-layout:fixed;border-collapse:separate;border-spacing:0;background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;font-size:.95rem;line-height:1.4}
.cmp .c-k{width:31%}
.cmp th,.cmp td{padding:12px 10px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.cmp tbody tr:last-child>*{border-bottom:0}
.cmp thead th{font-size:.9rem;font-weight:700}
.cmp th[scope=row]{font-weight:600;color:var(--mute);font-size:.88rem}
.cmp .us{background:var(--accent-soft);font-weight:600}
.notes{margin:12px 0 0;padding-left:1.3em;font-size:.84rem;color:var(--mute)}

/* form */
.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:20px 16px;box-shadow:var(--shadow)}
.field{border:0;margin:0 0 22px;padding:0;min-width:0}
.lbl{display:block;font-weight:650;margin:0 0 8px;padding:0}
.hint{font-size:.9rem;color:var(--mute);margin:-2px 0 10px}
input[type=email],input[type=text],textarea{display:block;width:100%;font:inherit;color:var(--ink);background:var(--bg);
  border:1.5px solid var(--line-strong);border-radius:12px;padding:12px 14px;min-height:52px}
input.short{max-width:12em}
textarea{resize:vertical;min-height:96px}
input::placeholder{color:var(--mute);opacity:.8}
input[aria-invalid=true]{border-color:var(--err)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{position:relative;display:inline-flex}
.chip input{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}
.chip span{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 16px;border-radius:999px;
  border:1.5px solid var(--line-strong);background:var(--bg);font-weight:550;font-size:1rem}
.chip:hover span{border-color:var(--accent)}
.chip input:checked+span{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.chip input:focus-visible+span{outline:3px solid var(--focus);outline-offset:2px}
.units .chip span{min-width:54px}
fieldset[data-invalid] .chip span{border-color:var(--err)}
.err{color:var(--err);font-size:.92rem;font-weight:600;margin:8px 0 0}
.more{margin:0 0 22px;border-top:1px solid var(--line);padding-top:6px}
.more summary{cursor:pointer;font-weight:650;color:var(--accent-ink);padding:10px 0;min-height:44px}
.more[open] summary{margin-bottom:10px}
.hp{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.actions{display:grid;gap:12px;margin-top:6px;grid-template-areas:"r" "f" "u"}
.a-r{grid-area:r}.a-f{grid-area:f;margin:0 0 6px}.a-u{grid-area:u}
.actions .btn{width:100%}
.status{min-height:1.5em;margin:16px 0 0;font-weight:600}
.status.bad{color:var(--err)}
.privacy{font-size:.86rem;color:var(--mute);margin:6px 0 0}
.terms{margin:18px 0 0;padding:16px;border:1.5px solid var(--line-strong);border-radius:14px;background:var(--bg);font-size:.9rem;line-height:1.5}
.terms h3{font-size:1rem;margin:0 0 8px}
.terms ul{margin:0 0 12px;padding-left:1.15em}
.terms li{margin:0 0 6px}
.terms p{margin:0;color:var(--mute)}
.terms p b{color:var(--ink)}

/* thank-you state (?joined=1, ?reserved=1). Shown by app.js, or by #thanks:target without JavaScript. */
.thanks{display:none;padding:12px 0 0}
.thanks:target,.thanks[data-show]{display:block}
.thanks-card{background:var(--accent-soft);border:1px solid var(--accent);border-radius:20px;padding:22px 18px}
.thanks-card:focus{outline:none}
.thanks .msg{display:none}
.thanks:not([data-show]) [data-state=joined],.thanks[data-show=joined] [data-state=joined],
.thanks[data-show=pending] [data-state=pending],.thanks[data-show=reserved] [data-state=reserved]{display:block}
.thanks h2{font-size:clamp(1.4rem,5vw,1.9rem)}
.share-lead{font-weight:600;margin-bottom:10px}
.share{display:flex;flex-wrap:wrap;gap:8px}
.share input{flex:1 1 220px;min-width:0;min-height:42px;padding:8px 12px;font-size:.95rem}

/* FAQ */
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;position:relative;padding:16px 40px 16px 0;font-weight:650;font-size:1.05rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:10px;font-size:1.6rem;font-weight:400;color:var(--accent-ink)}
.faq details[open] summary::after{content:"−"}
.faq details p{color:var(--mute);margin:0 0 18px}

/* footer */
.foot{border-top:1px solid var(--line);padding:32px 0 48px;font-size:.86rem;color:var(--mute);line-height:1.5}
.foot b{color:var(--ink)}
.fcc{border-left:3px solid var(--line-strong);padding-left:12px}

@media (min-width:600px){
  .ctas .btn{flex:0 0 auto}
  .actions{grid-template-areas:"r u" "f f";grid-template-columns:auto 1fr;justify-items:start}
  .a-f{margin:0}
  .actions .btn{width:auto}
  .card{padding:28px}
}
@media (min-width:760px){
  .steps{grid-template-columns:repeat(3,1fr)}
  .cmp{font-size:1rem}.cmp th,.cmp td{padding:14px 16px}
}
@media (min-width:920px){
  section{padding:84px 0}
  .hero{padding:32px 0 88px}
  .hero-grid{grid-template-columns:1fr 1fr;gap:56px;align-items:center}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.notfound{padding-top:64px;padding-bottom:64px}