/* ============================================================
   SEWN v2 — SHARED KERNEL STYLES
   Tokens + the demo stage + the brand cycler + nav primitives.
   Each direction layers its own frame on top of this.
   Palette is deliberately WARMER than v1: v1's near-black
   editorial tone is a large part of why it read "merch brand
   with taste" instead of "product you switch on".
   ============================================================ */

:root{
  --paper:#FAF8F4;
  --card:#FFFFFF;
  --ink:#14120F;
  --graphite:#4E4941;      /* 8.0:1 on --paper — labels, mono, dt */
  --muted:#6B655C;
  --line:#E6E0D5;
  --line-2:#D5CDBF;
  --thread:#A83E24;
  --sampled:#14120F;       /* set live by the demo from the reader's artwork */
  --r:14px;
  --r-sm:9px;
  --fs: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --fm: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --wrap:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html,body{overflow-x:hidden;max-width:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--fs);font-size:17px;line-height:1.55;
  font-weight:400;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
button{font:inherit;color:inherit}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.wrap--wide{max-width:1320px}
.vh{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
    clip:rect(0 0 0 0);white-space:nowrap;border:0}
.mono{font-family:var(--fm);font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--graphite)}

:focus-visible{outline:2px solid var(--thread);outline-offset:3px;border-radius:3px}

.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--paper);
      padding:12px 18px;z-index:100;border-radius:0 0 var(--r-sm) 0}
.skip:focus{left:0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  background:var(--ink);color:var(--paper);text-decoration:none;
  padding:15px 26px;border:0;border-radius:999px;cursor:pointer;
  font-weight:600;font-size:16px;letter-spacing:-.01em;
  transition:transform .16s ease, background .16s ease;
}
.btn:hover{transform:translateY(-1px);background:#000}
.btn--sm{padding:10px 18px;font-size:14.5px}
.btn--ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line-2)}
.btn--ghost:hover{background:#fff;border-color:var(--ink)}
.link-btn{background:none;border:0;padding:0;cursor:pointer;text-decoration:underline;
          text-underline-offset:3px;color:var(--graphite);font-size:14.5px}
.link-btn:hover{color:var(--ink)}

/* ============================================================
   NAV — segments live HERE, in a dropdown, never in the hero.
   (Square's "Business types" pattern: the single most transferable
   finding in research/05-horizontal-positioning.md.)
   ============================================================ */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 88%,transparent);
     backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.nav.is-stuck{border-bottom-color:var(--line)}
.nav__in{max-width:var(--wrap);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:26px}
.mark{display:inline-flex;align-items:baseline;gap:5px;text-decoration:none;font-weight:600;
      font-size:21px;letter-spacing:-.03em;margin-right:auto}
.mark__dot{width:6px;height:6px;border-radius:50%;background:var(--thread);display:block}
.nav__links{display:flex;align-items:center;gap:6px}
.nav__links > a,.seg__btn{display:inline-flex;align-items:center;gap:6px;text-decoration:none;
  font-size:15px;color:var(--graphite);padding:9px 12px;border-radius:var(--r-sm);
  background:none;border:0;cursor:pointer}
.nav__links > a:hover,.seg__btn:hover{color:var(--ink);background:#fff}
.seg{position:relative}
.seg__btn svg{width:11px;height:11px;transition:transform .18s}
.seg__btn[aria-expanded="true"] svg{transform:rotate(180deg)}
.seg__menu{position:absolute;top:calc(100% + 8px);left:-8px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r);padding:10px;
  box-shadow:0 18px 44px -18px rgba(20,18,15,.22);min-width:420px;
  display:grid;grid-template-columns:1fr 1fr;gap:2px}
.seg__menu[hidden]{display:none}
.seg__menu a{display:block;text-decoration:none;padding:10px 12px;border-radius:var(--r-sm);font-size:14.5px}
.seg__menu a:hover{background:var(--paper)}
.seg__menu b{display:block;font-weight:500}
.seg__menu span{display:block;font-size:12.5px;color:var(--muted);margin-top:1px}
.nav__burger{display:none;background:none;border:0;padding:9px;cursor:pointer}
.nav__burger span{display:block;width:20px;height:1.8px;background:var(--ink);border-radius:2px}
.nav__burger span+span{margin-top:5px}
.nav__mobile{display:none;padding:8px 24px 20px;border-top:1px solid var(--line);background:var(--paper)}
.nav__mobile a{display:block;text-decoration:none;padding:12px 0;font-size:17px;border-bottom:1px solid var(--line)}
.nav__mobile .btn{margin-top:16px;width:100%}

/* ============================================================
   THE DEMO STAGE — the mechanic that survives from v1 intact
   ============================================================ */
.stage{background:var(--card);border:1px solid var(--line);border-radius:calc(var(--r) + 8px);
       overflow:hidden;box-shadow:0 30px 70px -40px rgba(20,18,15,.30)}
.stage__bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:13px 20px;border-bottom:1px solid var(--line);background:var(--paper)}
.stage__state{display:inline-flex;align-items:center;gap:8px;margin:0;font-family:var(--fm);
  font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--graphite)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--line-2)}
.stage__state[data-state="reading"] .dot{background:var(--thread);animation:pulse 1s infinite}
.stage__state[data-state="rendered"] .dot{background:#2F7A46}
@keyframes pulse{50%{opacity:.25}}
.stage__label{margin:0 0 0 auto;font-family:var(--fm);font-size:11px;letter-spacing:.07em;
  text-transform:uppercase;color:var(--muted)}
.stage__grid{display:grid;grid-template-columns:300px 1fr;gap:0;min-width:0}
.drop-col{padding:22px;border-right:1px solid var(--line);min-width:0}
.stage__grid > *{min-width:0}

.drop{position:relative;width:100%;display:block;background:var(--paper);border:0;padding:26px 18px;
  border-radius:var(--r);cursor:pointer;text-align:center;transition:background .16s}
.drop__frame{position:absolute;inset:0;border:1.6px dashed var(--line-2);border-radius:var(--r);
  transition:border-color .16s, transform .16s}
.drop:hover{background:#fff}
.drop:hover .drop__frame{border-color:var(--ink)}
.drop.is-over{background:#fff}
.drop.is-over .drop__frame{border-color:var(--thread);border-style:solid;transform:scale(1.015)}
.drop__body{position:relative;display:block}
.drop__icon{display:block;margin:0 auto 10px;width:34px;color:var(--graphite)}
.drop__icon svg{width:100%;display:block}
.drop__title{display:block;font-weight:600;font-size:16px}
.drop__sub{display:block;font-size:13px;color:var(--muted);margin-top:3px}
.drop__help{font-size:12.5px;color:var(--muted);margin:11px 2px 0;line-height:1.45}
.drop__row{display:flex;gap:16px;margin-top:14px}

.readout{display:block;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-family:var(--fm);font-size:12px;line-height:1.75}
.readout__empty{color:var(--muted)}
.readout dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:3px 14px}
.readout dt{color:var(--graphite);letter-spacing:.05em;text-transform:uppercase;font-size:10.5px;padding-top:2px}
.readout dd{margin:0;color:var(--ink);word-break:break-word}
.sw{display:inline-block;width:9px;height:9px;border-radius:2px;background:var(--sampled);
    margin-right:6px;vertical-align:-1px;border:1px solid rgba(0,0,0,.12)}

/* previews */
.previews{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding:8px;
  align-content:center;height:100%;min-width:0}
.pv{margin:0;padding:14px 10px 12px;border-radius:var(--r-sm)}
.pv__art{background:var(--paper);border-radius:var(--r-sm);padding:6px}
.pv svg{width:100%;height:auto;display:block}
.pv .g-body{fill:#EFEAE0}
.pv .g-collar{fill:#E4DDD0}
.pv .g-line{fill:none;stroke:#D6CEC0;stroke-width:2.4}
.pv .slot__hint{fill:none;stroke:var(--line-2);stroke-dasharray:4 4;stroke-width:1.6;opacity:1;transition:opacity .3s}
.previews.is-rendered .slot__hint{opacity:0}
.pv .slot__img{opacity:0;transition:opacity .34s ease}
.previews.is-rendered .slot__img{opacity:1}
.previews.is-settling .slot{animation:settle .4s ease both}
@keyframes settle{from{transform:translateY(-5px);opacity:.35}to{transform:none;opacity:1}}
.pv figcaption{display:flex;justify-content:space-between;align-items:baseline;gap:8px;
  margin-top:9px;font-size:13px}
.pv figcaption .mono{font-size:10px}

/* ============================================================
   THE BRAND CYCLER — breadth SHOWN, not claimed.
   Eight fictional brands from eight different worlds. Software
   is one of the eight, and is never named.
   ============================================================ */
.cycbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding:13px 20px;border-top:1px solid var(--line);background:var(--paper)}
.cycbar__lead{margin:0;font-size:13.5px;color:var(--graphite)}
.cycbar__who{margin:0 0 0 auto;font-family:var(--fm);font-size:11px;letter-spacing:.07em;
  text-transform:uppercase;color:var(--ink)}
.cycler{display:flex;gap:6px;flex-wrap:wrap}
.cyc{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:7px 9px;cursor:pointer;line-height:0;transition:border-color .15s, transform .15s, background .15s}
.cyc:hover{border-color:var(--ink);transform:translateY(-1px)}
.cyc.is-on{border-color:var(--ink);background:#fff;box-shadow:0 0 0 2.5px rgba(20,18,15,.07)}
.cyc__mark{display:block;width:58px}
.cyc__mark svg{width:100%;height:auto;display:block}

.stage__foot{display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  padding:17px 20px;border-top:1px solid var(--line)}
.stage__foot p{margin:0;font-size:13.5px;color:var(--graphite);max-width:62ch}
.stage__foot .btn{margin-left:auto}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .stage__grid{grid-template-columns:1fr}
  .drop-col{border-right:0;border-bottom:1px solid var(--line)}
  .previews{grid-template-columns:repeat(4,1fr)}
}
@media (max-width:860px){
  .nav__links{display:none}
  .nav__burger{display:block}
  .nav.is-open .nav__mobile{display:block}
  .nav__cta-desktop{display:none}
}
@media (max-width:640px){
  body{font-size:16px}
  .previews{grid-template-columns:repeat(2,1fr)}
  .stage__label{margin-left:0;width:100%}
  .cycbar__who{margin-left:0;width:100%}
  .cyc__mark{width:50px}
  .stage__foot .btn{margin-left:0;width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
                       transition-duration:.001ms!important}
}

/* ============================================================
   SHARED SECTION FURNITURE (below the fold)
   ============================================================ */
.band{padding:84px 0;border-top:1px solid var(--line)}
.band--quiet{background:#F4F1EA}
.band__head{max-width:56ch;margin:0 0 40px}
.band__head h2{font-size:clamp(27px,3.4vw,40px);line-height:1.14;letter-spacing:-.028em;
  font-weight:600;margin:0 0 14px}
.band__head p{margin:0;font-size:17.5px;color:var(--graphite);line-height:1.6}

.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid4 figure{margin:0}
.grid4 img{border-radius:var(--r);background:#fff;aspect-ratio:1/1;object-fit:cover}
.grid4 figcaption{display:flex;justify-content:space-between;align-items:baseline;gap:10px;
  margin-top:11px;font-size:14.5px}

.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.steps li{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.steps__n{display:block;color:var(--thread);margin-bottom:14px}
.steps h3{margin:0 0 8px;font-size:19px;font-weight:600;letter-spacing:-.015em}
.steps p{margin:0;color:var(--graphite);font-size:15.5px;line-height:1.6}

.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
.tier{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:28px;
  display:flex;flex-direction:column;gap:12px}
.tier--on{border-color:var(--ink);box-shadow:0 20px 50px -30px rgba(20,18,15,.35)}
.tier__price{margin:0;font-size:38px;font-weight:600;letter-spacing:-.035em;line-height:1}
.tier__price span{font-size:16px;font-weight:400;color:var(--muted);letter-spacing:0}
.tier__line{margin:0;color:var(--graphite);font-size:15.5px;line-height:1.6;flex:1}
.tier .btn{margin-top:6px}
.tier p.mono{margin:0}

.foot{border-top:1px solid var(--line);padding:44px 0 56px;background:#F4F1EA}
.foot__in{display:flex;gap:32px;align-items:flex-start;flex-wrap:wrap}
.foot__legal{margin:0;max-width:70ch;font-size:13px;color:var(--muted);line-height:1.6}

@media (max-width:900px){
  .grid4{grid-template-columns:repeat(2,1fr)}
  .steps,.tiers{grid-template-columns:1fr}
  .band{padding:62px 0}
  .seg__menu{min-width:0;left:0;right:0;grid-template-columns:1fr}
}