/* StairTrax — calm one-page waitlist */
:root{
  --bg:#f6f3ee;
  --paper:#ffffff;
  --ink:#1d272d;
  --muted:#4f5b62;
  --line:#e0dad1;
  --accent:#2f4858;
  --accent-ink:#1f3440;
  --accent-soft:#e6edf0;
  --ok-bg:#eaf4ee;
  --ok-line:#b9d8c4;
  --ok-ink:#1b4a2f;
  --err-bg:#f8ecec;
  --err-line:#e3c4c4;
  --err-ink:#6b2a2a;
  --sans:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
html,body{background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6;font-size:17px}
a{color:var(--accent-ink);text-underline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--paper);padding:8px 12px;border-radius:8px;z-index:10}
.skip:focus{left:12px}
.wrap{width:min(1100px, calc(100% - 40px));margin:0 auto}
header.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0 16px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none;font-weight:700;font-size:1.1rem;letter-spacing:-.01em}
.brand svg{display:block;flex-shrink:0}
.nav{display:flex;align-items:center;gap:20px;font-size:.92rem}
.nav a{color:var(--muted);text-decoration:none;font-weight:600}
.nav a:hover{color:var(--ink)}
.nav .nav-cta{color:var(--accent-ink);border:1px solid var(--accent);border-radius:999px;padding:6px 14px}
.eyebrow{font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--accent);margin-bottom:10px}
h1,h2,h3{font-weight:700;letter-spacing:-.02em;line-height:1.15}
h1{font-size:clamp(2.4rem, 6vw, 3.6rem);margin-bottom:.25em}
.subhead{font-size:clamp(1.1rem, 2.3vw, 1.4rem);color:var(--muted);max-width:40ch;margin:0 auto}
.hero{text-align:center;padding:52px 0 28px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;font:inherit;font-weight:700;border:0;border-radius:999px;padding:13px 24px;cursor:pointer;text-decoration:none;font-size:1rem}
.btn:hover{background:var(--accent-ink);color:#fff}
.btn-ghost{display:inline-flex;align-items:center;background:transparent;color:var(--ink);border:1px solid var(--line);border-radius:999px;padding:12px 20px;text-decoration:none;font-weight:600}
.btn-ghost:hover{border-color:var(--accent)}
.btn-block{width:100%}
.hero-visual{margin:8px 0 0;background:var(--paper);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 20px 50px rgba(29,39,45,.07)}
.hero-visual img{display:block;width:100%;height:auto}
.hero-visual figcaption{font-size:.85rem;color:var(--muted);padding:10px 16px 12px;border-top:1px solid var(--line)}
section{padding:44px 0 8px}
h2{font-size:clamp(1.4rem, 2.6vw, 1.8rem);margin-bottom:8px}
.section-kicker{color:var(--muted);margin-bottom:20px;max-width:60ch}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feature{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:22px 20px}
.feature h2{font-size:1.2rem;margin-bottom:6px}
.feature p{color:var(--muted)}
.design-list{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:10px 24px;max-width:900px}
.design-list li{position:relative;padding:12px 14px 12px 40px;background:var(--paper);border:1px solid var(--line);border-radius:12px}
.design-list li::before{content:"";position:absolute;left:16px;top:21px;width:10px;height:10px;border-radius:3px;background:var(--accent)}
.waitlist{max-width:560px}
.disclaimer{display:inline-block;background:var(--accent-soft);color:var(--accent-ink);font-weight:600;font-size:.92rem;padding:8px 14px;border-radius:10px;margin-bottom:16px}
form.wait{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 8px 28px rgba(29,39,45,.05)}
.field{margin-bottom:16px;min-width:0}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field label{display:block;font-size:.88rem;font-weight:700;color:var(--ink);margin-bottom:6px}
.req,.opt{font-weight:500;color:var(--muted)}
.field input,.field select{width:100%;border:1px solid #c9c2b7;background:#fff;color:var(--ink);padding:12px 13px;font:inherit;border-radius:10px;min-height:48px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.ok{background:var(--ok-bg);border:1px solid var(--ok-line);color:var(--ok-ink);padding:20px 22px;border-radius:14px}
.ok h3{font-size:1.15rem;margin-bottom:4px}
.err{background:var(--err-bg);border:1px solid var(--err-line);color:var(--err-ink);padding:10px 14px;border-radius:10px;margin-bottom:14px}
footer{border-top:1px solid var(--line);margin-top:60px;padding:22px 0 44px;color:var(--muted);font-size:.9rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.disclaimer-foot{font-weight:600;color:var(--ink)}
.msg-page{padding:64px 0 40px}
@media(max-width:860px){
  .features{grid-template-columns:1fr}
  .design-list{grid-template-columns:1fr}
}
@media(max-width:520px){
  html,body{font-size:16px}
  .nav a:not(.nav-cta){display:none}
  .hero{padding:36px 0 22px}
  .field-row{grid-template-columns:1fr;gap:0}
  form.wait{padding:18px}
  .hero-visual{border-radius:12px}
}