/* ============================================================
   NOIDAUTH — v3 "THE MECHANISM" — content layer
   bg #171717 · panels #1C1C1C/#242424 · text #DEDEDE
   accent #F25623 — light/ink, never flood (except the keyhole,
   at the grant, per the brief).
   One viewport on desktop. Typing drives the machine.
   ============================================================ */

@font-face{
  font-family:'Ugocranis';
  src:url('assets/fonts/ugocranis.woff2') format('woff2');
  font-display:swap;
}

:root{
  --bg:#171717; --bg1:#1C1C1C; --bg2:#242424; --bg3:#353535;
  --tx:#DEDEDE; --tx2:#C4C4C4; --mut:#8B8B8B; --dim:#848484;
  /* --dim = dimmest TEXT tier, WCAG AA on every surface it lands on:
     #141414 → 4.93:1, #171717 → 4.79:1, #1C1C1C → 4.56:1 (was #4D4D4D = 2.12:1). */
  --decor:#4D4D4D;
  --acc:#F25623; --accd:#C8451C;
  --hair:rgba(255,255,255,.07);
  --disp:'Ugocranis','Space Grotesk',sans-serif;
  --body:'Space Grotesk',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --ease:cubic-bezier(.16,1,.3,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scrollbar-width:none}
::-webkit-scrollbar{width:0;height:0}
html,body{background:var(--bg);color:var(--tx)}
body{
  font-family:var(--body);
  font-size:15px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
  min-height:100svh;
  display:grid;grid-template-rows:auto 1fr auto auto;
  overflow-x:clip;
}
a{color:inherit;text-decoration:none}
::selection{background:var(--acc);color:#171717}
.sr-only{
  position:absolute;width:1px;height:1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;
}
:focus-visible{outline:1px solid var(--acc);outline-offset:2px}

/* desktop: one viewport, forever */
@media(min-width:900px){
  body{height:100svh;overflow:clip}
}

#grain{
  position:fixed;inset:-40px;z-index:8;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='260'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- nav ---------- */
#nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px clamp(20px,3.4vw,48px);
  position:relative;z-index:9;
}
.brand{font-family:var(--disp);font-size:21px;letter-spacing:.08em;color:var(--tx)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-prop{font-family:var(--mono);font-size:10.5px;letter-spacing:.30em;color:var(--mut)}
.nav-cta{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;color:var(--tx2);
  border:1px solid rgba(255,255,255,.22);
  padding:9px 16px;
  display:inline-flex;align-items:center;gap:9px;
  transition:color .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
}
.nav-cta .cta-tick{width:6px;height:6px;background:var(--acc);display:inline-block}
.nav-cta:hover{color:var(--tx);border-color:var(--acc);background:rgba(242,86,35,.08)}
.nav-dot{
  width:6px;height:6px;border-radius:50%;background:var(--acc);
  box-shadow:0 0 8px rgba(242,86,35,.8);
  animation:pulse 2.6s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
/* the sound toggle mounts itself in here — sound.js styles the button
   (mono 10px/.14em, 1px border, orange when on): a sibling of .lang-btn */
#sound-mount{display:flex;align-items:center;margin-left:-8px}

/* ---------- main split: machine left, card right ---------- */
#main{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(360px,408px);
  gap:clamp(16px,2.4vw,40px);
  padding:0 clamp(20px,3.4vw,48px);
  min-height:0;
  position:relative;z-index:2;
}

/* ---------- the stage ---------- */
#stage{position:relative;min-height:0}

#mechwrap{position:absolute;inset:0}
#mech{position:absolute;inset:0;width:100%;height:100%;display:block}

.stage-head{
  position:absolute;top:clamp(6px,2.4vh,28px);left:0;z-index:3;
  max-width:400px;pointer-events:none;
}
.stage-head::before{
  content:'';position:absolute;z-index:-1;
  inset:-16% -30% -20% -36%;
  background:radial-gradient(100% 100% at 34% 42%,
    rgba(17,17,17,.78) 0%, rgba(17,17,17,.38) 55%, rgba(17,17,17,0) 80%);
  pointer-events:none;
}
.overline{
  font-family:var(--mono);font-size:10px;letter-spacing:.32em;color:var(--tx2);
  display:flex;align-items:center;gap:14px;margin-bottom:22px;
  white-space:nowrap;
}
.overline .tick{width:26px;height:1px;background:var(--acc);display:inline-block;flex:none}
.h1{
  font-family:var(--disp);font-weight:400;
  font-size:clamp(38px,3.9vw,56px);
  line-height:.98;letter-spacing:.01em;color:var(--tx);
  margin-bottom:20px;
}
.sub{
  max-width:40ch;color:var(--tx2);font-size:13.5px;font-weight:300;
  line-height:1.7;
}

/* the grant line — appears when the bolt throws (above the hot keyhole) */
#grantline{
  position:absolute;left:55%;top:31%;z-index:4;   /* centred on the keyhole axis */
  transform:translate(-50%,-46%);
  text-align:center;pointer-events:none;
  opacity:0;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
#grantline.on{opacity:1;transform:translate(-50%,-50%)}
#grantline::before{
  content:'';position:absolute;z-index:-1;
  inset:-46% -34% -52% -34%;
  background:radial-gradient(58% 62% at 50% 48%,
    rgba(13,10,8,.72) 0%, rgba(13,10,8,.38) 55%, rgba(13,10,8,0) 78%);
}
.g-big{
  font-family:var(--disp);font-weight:400;
  font-size:clamp(34px,3.6vw,54px);line-height:1;letter-spacing:.012em;
  color:var(--tx);
  text-shadow:0 2px 30px rgba(10,10,10,.85),0 0 70px rgba(10,10,10,.6);
}
.g-big .accent{color:var(--acc)}
.g-sub{
  margin-top:16px;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.30em;color:var(--tx);
  text-shadow:0 1px 6px rgba(10,10,10,.95),0 0 18px rgba(10,10,10,.9);
}

/* ---------- status strip — the machine's readout ---------- */
#status{
  position:absolute;left:0;bottom:clamp(6px,2vh,22px);z-index:3;
  pointer-events:none;
}
.st-state{
  display:flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:10px;letter-spacing:.26em;color:var(--tx2);
  margin-bottom:8px;white-space:nowrap;
}
.st-dot{
  width:5px;height:5px;flex:none;background:var(--acc);
  box-shadow:0 0 7px rgba(242,86,35,.9);
}
.st-count{
  font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--mut);
  font-variant-numeric:tabular-nums;
  margin-bottom:10px;white-space:nowrap;
}
.st-count .lit{color:var(--acc)}
.st-note{
  font-family:var(--mono);font-size:8.5px;letter-spacing:.14em;line-height:1.9;
  color:var(--dim);white-space:nowrap;
}

/* ---------- the card ---------- */
#panel{
  display:flex;align-items:center;justify-content:flex-end;
  min-height:0;padding:12px 0;
}
.auth-card{
  position:relative;
  width:min(408px,100%);
  max-height:100%;overflow-y:auto;scrollbar-width:none;
  background:linear-gradient(165deg, rgba(32,32,32,.86), rgba(21,21,21,.72));
  -webkit-backdrop-filter:blur(18px) saturate(1.25);
  backdrop-filter:blur(18px) saturate(1.25);
  border:1px solid rgba(255,255,255,.11);
  border-top-color:rgba(255,255,255,.20);
  border-radius:3px;
  box-shadow:0 40px 110px rgba(0,0,0,.65), inset 0 1px 0 rgba(255,255,255,.05);
  padding:24px 28px 20px;
}
.auth-card::-webkit-scrollbar{width:0}
.auth-card::before,.auth-card::after{
  content:'';position:absolute;width:11px;height:11px;pointer-events:none;
}
.auth-card::before{
  top:-1px;left:-1px;
  border-top:1px solid var(--acc);border-left:1px solid var(--acc);
}
.auth-card::after{
  bottom:-1px;right:-1px;
  border-bottom:1px solid var(--acc);border-right:1px solid var(--acc);
}
.a-top{
  display:flex;align-items:center;gap:14px;
  font-family:var(--mono);font-size:10px;letter-spacing:.26em;
  color:var(--mut);margin-bottom:14px;
}
.a-idx{color:var(--acc)}
.a-cat{flex:1}
/* the session chip — lit ONLY by a session the service confirmed
   (/login 200, or /verify on a live noid_token cookie). Nothing local. */
.session-chip{
  font-family:var(--mono);font-size:8.5px;letter-spacing:.18em;
  color:var(--acc);white-space:nowrap;
  border:1px solid rgba(242,86,35,.55);
  background:rgba(242,86,35,.08);
  padding:3px 7px;
}
.a-live{
  width:5px;height:5px;border-radius:50%;background:var(--acc);
  box-shadow:0 0 7px rgba(242,86,35,.9);
  animation:pulse 2.2s ease-in-out infinite;
}
.a-head{
  display:flex;align-items:baseline;justify-content:space-between;
  margin-bottom:16px;
}
.a-title{
  font-family:var(--disp);font-weight:400;
  font-size:38px;line-height:1;letter-spacing:.015em;color:var(--tx);
}
.a-badge{
  font-family:var(--mono);font-size:9px;letter-spacing:.2em;
  color:#171717;background:var(--acc);
  padding:4px 8px;font-weight:600;
}
.tab-switcher{
  display:grid;grid-template-columns:1fr 1fr;
  border:1px solid rgba(255,255,255,.14);
  margin-bottom:18px;
}
.tab-btn{
  appearance:none;border:0;background:transparent;cursor:pointer;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mut);padding:11px 0;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.tab-btn.active{background:var(--tx);color:#171717;font-weight:600}
.tab-btn:hover:not(.active){color:var(--tx);background:rgba(255,255,255,.06)}
.form-group{margin-bottom:14px}
.form-label{
  display:block;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--mut);
  margin-bottom:7px;
}
.label-soft{color:var(--dim);text-transform:none;letter-spacing:.1em}
.form-input{
  width:100%;
  font-family:var(--body);font-size:14px;color:var(--tx);
  background:rgba(23,23,23,.85);
  border:1px solid var(--bg3);
  padding:11px 13px;border-radius:0;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.form-input::placeholder{color:#5C5C5C}
.form-input:focus,.form-input.sim-focus{
  outline:none;border-color:var(--acc);
  box-shadow:0 0 0 1px rgba(242,86,35,.35);
}
.form-select{appearance:none;cursor:pointer;
  background-image:linear-gradient(45deg,transparent 49%,var(--mut) 50%,transparent 60%),
    linear-gradient(-45deg,transparent 49%,var(--mut) 50%,transparent 60%);
  background-position:calc(100% - 20px) 55%,calc(100% - 14px) 55%;
  background-size:6px 6px;background-repeat:no-repeat;
}
.form-select option{background:#1C1C1C;color:var(--tx)}
/* show/hide password — the toggle flips one pin in the stack */
.pw-wrap{position:relative}
.pw-wrap .form-input{padding-right:62px}
.pw-toggle{
  position:absolute;top:1px;right:1px;bottom:1px;
  appearance:none;border:0;cursor:pointer;
  border-left:1px solid var(--bg3);
  background:rgba(255,255,255,.04);color:var(--mut);
  font-family:var(--mono);font-size:8.5px;letter-spacing:.18em;
  padding:0 11px;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.pw-toggle:hover{color:var(--tx);background:rgba(255,255,255,.08)}
.pw-toggle[aria-pressed="true"]{color:var(--acc)}
.caps-note{
  margin-top:6px;
  font-family:var(--mono);font-size:8.5px;letter-spacing:.16em;
  color:var(--acc);
}
.caps-note::before{content:'▲ ';font-size:7px}
.policy{
  list-style:none;margin-top:9px;
  display:grid;grid-template-columns:1fr 1fr;gap:2px 14px;
}
.policy li{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.06em;
  color:var(--mut);
}
.policy li::before{content:'[ ] ';color:#5C5C5C}
.policy li.ok{color:var(--tx)}
.policy li.ok::before{content:'[x] ';color:var(--acc);font-weight:700}
#pw-match-list{grid-template-columns:1fr}
.form-msg{
  font-family:var(--mono);font-size:10px;letter-spacing:.08em;
  color:var(--acc);
  border:1px solid rgba(242,86,35,.4);
  background:rgba(242,86,35,.07);
  padding:9px 12px;margin-bottom:14px;
}
.form-msg.good{
  color:var(--tx2);
  border-color:rgba(255,255,255,.18);
  background:rgba(255,255,255,.045);
}
/* the submit is MAGNETIC: mech.js springs --mx/--my toward the pointer
   (fine pointers only, live mode only). No JS / reduced motion / touch →
   the vars are never set and the button sits exactly where it always did. */
.btn-submit{
  appearance:none;border:0;cursor:pointer;width:100%;
  font-family:var(--mono);font-size:11px;letter-spacing:.24em;
  text-transform:uppercase;font-weight:600;
  color:#171717;background:var(--acc);
  padding:14px 0;
  transform:translate(var(--mx,0px),var(--my,0px));
  transition:background .25s var(--ease),box-shadow .35s var(--ease);
}
.btn-submit:hover{background:var(--accd);box-shadow:0 8px 34px rgba(242,86,35,.22)}
.btn-submit:active{transform:translate(calc(var(--mx,0px) + 1px),calc(var(--my,0px) + 1px))}
.form-footer{
  margin-top:13px;text-align:center;
  font-size:12px;color:var(--mut);
}
.form-footer a{color:var(--acc)}
.form-footer a:hover{color:var(--tx)}
/* ---------- the card's other two faces — both REAL states of the service:
   #panel-created = a real 201 from /signup (the minted NOID + its QR)
   #panel-account = a real session (/login 200, or /verify on a live cookie)
   Both are deliberately SHORTER than the forms they replace, so the
   one-viewport law (390x844 and 390x700) cannot break on the way in. ---------- */
.cr-msg{
  font-size:13px;font-weight:300;line-height:1.6;color:var(--tx2);
  margin-bottom:14px;
}
.cr-k{
  display:block;
  font-family:var(--mono);font-size:9px;letter-spacing:.24em;
  color:var(--mut);margin-bottom:6px;
}
.cr-id{
  font-family:var(--mono);font-size:20px;letter-spacing:.14em;
  color:var(--acc);
  border:1px solid rgba(242,86,35,.35);
  background:rgba(242,86,35,.06);
  padding:10px 12px;margin-bottom:12px;
  word-break:break-all;
}
.cr-qr{
  display:flex;justify-content:center;
  margin-bottom:10px;
}
.cr-qr img{
  display:block;width:118px;height:118px;
  border:1px solid rgba(255,255,255,.14);
  background:#DEDEDE;padding:5px;
  image-rendering:pixelated;
}
.cr-save{
  font-family:var(--mono);font-size:9px;letter-spacing:.06em;line-height:1.7;
  color:var(--dim);margin-bottom:14px;
}
.acct-who{
  display:flex;align-items:center;gap:13px;
  margin-bottom:15px;
}
.acct-avatar{
  width:44px;height:44px;flex:none;
  display:grid;place-items:center;
  font-family:var(--disp);font-size:21px;color:#171717;
  background:var(--acc);
}
.acct-name{
  font-family:var(--body);font-size:17px;color:var(--tx);
  line-height:1.25;word-break:break-all;
}
.acct-id{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--acc);
}
.acct-meta{
  border-top:1px solid var(--hair);
  margin-bottom:15px;
}
.meta-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  padding:8px 0;
  border-bottom:1px solid var(--hair);
}
.meta-row dt{
  font-family:var(--mono);font-size:9px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--mut);
}
.meta-row dd{
  font-size:12.5px;color:var(--tx2);
  text-align:right;word-break:break-all;
}
.btn-submit.btn-ghost{
  color:var(--tx2);background:transparent;
  border:1px solid rgba(255,255,255,.22);
}
.btn-submit.btn-ghost:hover{
  color:var(--tx);border-color:var(--acc);
  background:rgba(242,86,35,.08);box-shadow:none;
}
.a-foot{
  margin-top:16px;padding-top:13px;
  border-top:1px solid var(--hair);
  display:flex;flex-direction:column;gap:4px;
}
.a-one{font-family:var(--body);font-weight:300;font-size:13.5px;color:var(--tx)}
.a-fam{font-family:var(--mono);font-size:9.5px;letter-spacing:.10em;color:var(--mut)}

/* ---------- focus leader (svg overlay) ---------- */
#overlay{
  position:fixed;inset:0;width:100vw;height:100vh;
  z-index:5;pointer-events:none;
}
#leader{transition:opacity .3s var(--ease)}
#ld-line{fill:none;stroke:var(--acc);stroke-width:1;opacity:.75}
#ld-anchor{fill:#171717;stroke:var(--acc);stroke-width:1}
#ld-text{
  font-family:var(--mono);font-size:9px;letter-spacing:.24em;
  fill:var(--acc);
}

/* ---------- infobar — the service plate (live auth.noid.gg copy) ---------- */
#infobar{
  display:grid;grid-template-columns:1.25fr 1.15fr .75fr;
  gap:clamp(18px,3vw,48px);
  padding:14px clamp(20px,3.4vw,48px) 13px;
  border-top:1px solid var(--hair);
  position:relative;z-index:2;
}
.ib-k{
  display:flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:8.5px;letter-spacing:.26em;
  color:var(--acc);margin-bottom:6px;
}
.ib-tick{width:14px;height:1px;background:var(--acc);display:inline-block;flex:none}
.ib-item p{
  font-size:11.5px;font-weight:300;line-height:1.6;
  color:var(--mut);max-width:56ch;
}
.ib-links{display:flex;align-items:center;gap:7px 16px;flex-wrap:wrap}
.ib-links a{
  font-family:var(--mono);font-size:10px;letter-spacing:.12em;color:var(--tx2);
  border-bottom:1px solid rgba(255,255,255,.16);padding-bottom:2px;
  transition:color .35s var(--ease),border-color .35s var(--ease);
}
.ib-links a:hover{color:var(--acc);border-color:var(--acc)}

/* ---------- THE FIVE DOORS — one signet per family site.
   A hairline plate; on hover the signet lights and the same two orange
   corner ticks that frame the auth card frame the door: the signet
   UNLOCKS, then the portal carries you through. ---------- */
.doors{display:flex;align-items:flex-start;gap:8px;flex-wrap:wrap;margin-top:2px}
.door{
  display:flex;flex-direction:column;align-items:center;gap:5px;
  width:44px;color:var(--mut);
  transition:color .35s var(--ease);
}
.d-sig{
  position:relative;width:36px;height:36px;
  display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.016);
  transition:border-color .35s var(--ease),background .35s var(--ease);
}
.d-sig::before,.d-sig::after{
  content:'';position:absolute;width:5px;height:5px;
  opacity:0;transition:opacity .3s var(--ease);
}
.d-sig::before{top:-1px;left:-1px;border-top:1px solid var(--acc);border-left:1px solid var(--acc)}
.d-sig::after{bottom:-1px;right:-1px;border-bottom:1px solid var(--acc);border-right:1px solid var(--acc)}
.d-sig svg{display:block;width:19px;height:19px;overflow:visible}
.d-sig svg circle,.d-sig svg path,.d-sig svg rect{
  fill:none;stroke:currentColor;stroke-width:1;
  stroke-linejoin:miter;stroke-linecap:square;
  vector-effect:non-scaling-stroke;
}
.d-sig svg .fillx{fill:currentColor;stroke:none}
.d-lb{
  font-family:var(--mono);font-size:8px;letter-spacing:.14em;color:var(--dim);
  transition:color .35s var(--ease);
}
.door:hover,.door:focus-visible{color:var(--acc)}
.door:hover .d-sig,.door:focus-visible .d-sig{
  border-color:rgba(242,86,35,.5);background:rgba(242,86,35,.06);
}
.door:hover .d-sig::before,.door:hover .d-sig::after,
.door:focus-visible .d-sig::before,.door:focus-visible .d-sig::after{opacity:1}
.door:hover .d-lb,.door:focus-visible .d-lb{color:var(--tx2)}
.door:focus-visible{outline:1px solid var(--acc);outline-offset:3px}

/* ---------- footer ---------- */
#end{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:14px clamp(20px,3.4vw,48px) 16px;
  border-top:1px solid var(--hair);
  position:relative;z-index:2;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:var(--dim);
}
.f-fam{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  font-size:10.5px;letter-spacing:.16em;
}
.f-fam a{color:var(--mut);transition:color .35s var(--ease)}
.f-fam a:hover{color:var(--acc)}
.f-fam span{color:var(--dim)}
.f-copy{white-space:nowrap}
.f-service{white-space:nowrap}

/* ---------- short desktop (≤789px tall): compact card + slim plate,
   so the one-viewport law survives 720p screens ---------- */
@media(min-width:900px) and (max-height:789px){
  #nav{padding:12px clamp(20px,3.4vw,48px)}
  .auth-card{padding:16px 22px 14px}
  .a-top{margin-bottom:9px}
  .a-head{margin-bottom:10px}
  .a-title{font-size:30px}
  .tab-switcher{margin-bottom:12px}
  .tab-btn{padding:8px 0}
  .form-group{margin-bottom:10px}
  .form-label{margin-bottom:5px}
  .form-input{padding:8px 12px}
  .btn-submit{padding:11px 0}
  .form-footer{margin-top:9px}
  .cr-msg{font-size:12px;margin-bottom:10px}
  .cr-id{font-size:17px;padding:8px 10px;margin-bottom:9px}
  .cr-qr img{width:96px;height:96px}
  .cr-save{margin-bottom:10px}
  .acct-who{margin-bottom:11px}
  .acct-avatar{width:38px;height:38px;font-size:18px}
  .acct-meta{margin-bottom:11px}
  .meta-row{padding:6px 0}
  .a-foot{margin-top:10px;padding-top:9px}
  #infobar{padding:9px clamp(20px,3.4vw,48px) 8px}
  .ib-item p{font-size:10.5px;line-height:1.5}
  .ib-k{margin-bottom:4px}
  #end{padding:10px clamp(20px,3.4vw,48px) 12px}
  .d-sig{width:29px;height:29px}
  .d-sig svg{width:16px;height:16px}
  .door{width:38px;gap:4px}
  .doors{gap:6px}
}

/* ---------- mobile — ONE VIEWPORT OF EVERYTHING (390x844 and 390x700) ----------
   The whole page lives in a single 100dvh frame: compact head, the machine as a
   full-bleed backdrop strip that FLEXES to absorb leftover height, tight form,
   CTA always on-frame. When the soft keyboard arrives (body.kbd) the mechanism
   yields — it shrinks to a sliver and the form keeps the frame. */
@media(max-width:899px){
  body{
    display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;
    height:100dvh;min-height:0;overflow:clip;
  }
  #nav{padding:10px 16px 8px}
  .brand{font-size:17px}
  .nav-prop{display:none}
  .nav-cta{padding:6px 11px;font-size:9px}
  #main{
    display:flex;flex-direction:column;
    padding:0 16px;min-height:0;
  }
  #stage{display:flex;flex-direction:column;flex:1;min-height:0}
  .stage-head{
    position:static;max-width:100%;
    padding:0;flex:none;
  }
  .stage-head::before{display:none}
  .overline{margin-bottom:6px;font-size:8px;letter-spacing:.2em}
  .overline .tick{width:16px}
  .h1{font-size:24px;margin-bottom:5px}
  .h1 br{display:none}
  .sub{font-size:11px;line-height:1.5;max-width:100%}
  #mechwrap{
    position:relative;inset:auto;
    flex:1;min-height:96px;
    margin:0 -16px;   /* full-bleed machine strip */
  }
  #grantline{width:100%;top:42%;left:50%}
  /* the halo's -34% side bleed off a 100%-wide grantline pushed 133px of
     phantom page width past the viewport (real horizontal scroll on a phone);
     at full width the vignette needs no side bleed at all */
  #grantline::before{inset:-46% 0 -52% 0}
  .g-big{font-size:21px}
  .g-sub{margin-top:8px;font-size:7.5px;letter-spacing:.18em}
  #status{
    position:static;flex:none;padding:2px 0 6px;
  }
  .st-state{font-size:8.5px;letter-spacing:.18em;margin-bottom:3px}
  .st-count{font-size:8.5px;letter-spacing:.12em;margin-bottom:0}
  .st-note{display:none}
  #panel{display:block;flex:none;padding:0 0 8px}
  .auth-card{width:100%;max-height:none;padding:14px 16px 12px}
  .a-top{margin-bottom:8px}
  .a-head{margin-bottom:9px}
  .a-title{font-size:24px}
  .a-badge{font-size:8px;padding:3px 6px}
  .tab-switcher{margin-bottom:11px}
  .tab-btn{padding:8px 0;font-size:9.5px}
  .form-group{margin-bottom:9px}
  .form-label{font-size:8.5px;margin-bottom:4px}
  .form-input{font-size:16px;padding:8px 11px}  /* 16px: no iOS focus-zoom */
  .policy{grid-template-columns:1fr 1fr;gap:1px 10px}
  .policy li{font-size:8.5px}
  .btn-submit{padding:11px 0;font-size:10px}
  .form-footer{margin-top:8px;font-size:11px}
  .a-foot{display:none}   /* its lines live in the infobar + footer on mobile */
  /* the two real-state faces, compacted — they must fit the SAME one viewport */
  .cr-msg{font-size:11.5px;margin-bottom:10px}
  .cr-id{font-size:16px;padding:8px 10px;margin-bottom:9px}
  .cr-qr img{width:92px;height:92px}
  .cr-qr{margin-bottom:8px}
  .cr-save{font-size:8.5px;margin-bottom:10px}
  .acct-who{gap:11px;margin-bottom:11px}
  .acct-avatar{width:38px;height:38px;font-size:18px}
  .acct-name{font-size:15px}
  .acct-meta{margin-bottom:11px}
  .meta-row{padding:6px 0}
  .meta-row dd{font-size:11.5px}
  #infobar{
    display:block;padding:9px 16px 8px;
  }
  .ib-item{display:none}
  .ib-item:first-child{display:block}
  .ib-k{display:none}
  .ib-item p{font-size:9.5px;line-height:1.5;max-width:100%;
    font-family:var(--mono);letter-spacing:.04em;color:var(--dim)}
  #end{
    gap:8px 14px;flex-wrap:wrap;
    padding:8px 16px 10px;
    font-size:8px;letter-spacing:.14em;
  }
  .f-service{display:none}
  .f-fam{font-size:9px;letter-spacing:.12em;gap:9px}
}

/* short mobile frame (≈ keyboard height at 390x700): the page still fits */
@media(max-width:899px) and (max-height:759px){
  .sub{display:none}
  #infobar{display:none}
  .st-count{display:none}
  #end{display:none}
  #mechwrap{min-height:84px}
}

/* the soft keyboard is up — the mechanism yields, the form keeps the frame */
@media(max-width:899px){
  body.kbd .sub{display:none}
  body.kbd #infobar{display:none}
  body.kbd #end{display:none}
  body.kbd .st-count{display:none}
  body.kbd #mechwrap{flex:0 0 72px;min-height:72px}
}

/* absurdly short frames: give scroll back rather than crush the form */
@media(max-width:899px) and (max-height:479px){
  body{height:auto;overflow:clip auto}
  #mechwrap{flex:none;height:140px}
}

/* ---------- boot entrance (live mode only; poses/reduced stay static) ---------- */
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
body.boot .overline{opacity:0;animation:rise .9s var(--ease) .15s forwards}
body.boot .h1{opacity:0;animation:rise 1s var(--ease) .30s forwards}
body.boot .sub{opacity:0;animation:rise 1s var(--ease) .45s forwards}
body.boot #status{opacity:0;animation:rise .9s var(--ease) .80s forwards}
body.boot .auth-card{opacity:0;animation:rise .9s var(--ease) .60s forwards}

/* ---------- reduced motion: static complete page ---------- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  #grantline{display:none}
}

/* ============================================================
   i18n pass — language switcher (live .lang-btn pattern) + zh-CN
   ============================================================ */
.lang-selector{display:flex;align-items:center;gap:2px}
.lang-btn{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;
  background:transparent;color:var(--mut);
  border:1px solid transparent;
  padding:6px 9px;line-height:1;cursor:pointer;
  transition:color .35s var(--ease),border-color .35s var(--ease);
}
.lang-btn:hover{color:var(--tx)}
.lang-btn.active{color:var(--acc);border-color:rgba(242,86,35,.45)}
.lang-btn:focus-visible{outline:1px solid var(--acc);outline-offset:2px}
@media(max-width:899px){
  .nav-links{gap:12px}
  .lang-btn{padding:5px 7px;font-size:9px}
}

/* ---------- zh-CN — Ugocranis/JetBrains have no CJK: per-glyph fallback
   to a clean system CJK stack; long tracking eases off so hanzi hold
   together; the ONE-VIEWPORT law survives zh line lengths ---------- */
html[lang^="zh"]{
  --disp:'Ugocranis','Noto Sans CJK SC','PingFang SC','Hiragino Sans GB','Source Han Sans SC','Microsoft YaHei',sans-serif;
  --body:'Space Grotesk','Noto Sans CJK SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  --mono:'JetBrains Mono','Noto Sans Mono CJK SC','Noto Sans CJK SC','PingFang SC','Microsoft YaHei',ui-monospace,monospace;
}
html[lang^="zh"] .h1{line-height:1.1;letter-spacing:.04em}
html[lang^="zh"] .overline{letter-spacing:.22em}
html[lang^="zh"] .nav-prop{letter-spacing:.2em}
html[lang^="zh"] .sub{line-height:1.85}
html[lang^="zh"] .g-big{letter-spacing:.03em}
html[lang^="zh"] .g-sub{letter-spacing:.2em}
html[lang^="zh"] .st-state{letter-spacing:.16em}
html[lang^="zh"] .st-count{letter-spacing:.1em}
html[lang^="zh"] .st-note{letter-spacing:.08em;line-height:1.8}
html[lang^="zh"] .a-cat,html[lang^="zh"] .session-chip{letter-spacing:.14em}
html[lang^="zh"] .tab-btn{letter-spacing:.14em}
html[lang^="zh"] .form-label{letter-spacing:.14em}
html[lang^="zh"] .btn-submit{letter-spacing:.2em}
html[lang^="zh"] .pw-toggle{letter-spacing:.1em}
html[lang^="zh"] .caps-note{letter-spacing:.1em}
html[lang^="zh"] .ib-k{letter-spacing:.18em}
html[lang^="zh"] #end{letter-spacing:.14em}
html[lang^="zh"] .f-fam{letter-spacing:.12em}