:root{
  --bg:#070a12; --bg2:#0b1020;
  --card:rgba(18,23,38,.72); --card-line:rgba(255,255,255,.08);
  --text:#eef2ff; --muted:#8b93ab; --faint:#5b6680;
  --accent:#5b8cff; --accent2:#9b6bff; --accent3:#2dd4bf;
  --good:#34d399; --warn:#fbbf24; --bad:#f87171;
  --ring:rgba(91,140,255,.45);
  --bn:'Hind Siliguri',system-ui,sans-serif;
  --latin:'Inter',system-ui,sans-serif;
  --mono:'JetBrains Mono',monospace;
  --r:16px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
[hidden]{display:none!important}
body{
  font-family:var(--bn);
  background:var(--bg);
  color:var(--text);
  min-height:100vh;min-height:100dvh;
  display:flex;
  padding:clamp(14px,4vh,40px) clamp(12px,4vw,24px);
  /* iOS safe-area insets so the card clears notches/home-bar in any orientation */
  padding-left:max(clamp(12px,4vw,24px),env(safe-area-inset-left));
  padding-right:max(clamp(12px,4vw,24px),env(safe-area-inset-right));
  position:relative;overflow-x:hidden;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}

/* ── Animated background ── */
.bg{position:fixed;inset:0;z-index:0;overflow:hidden;background:
  radial-gradient(1200px 800px at 80% -10%, #11183a 0%, transparent 60%),
  radial-gradient(900px 700px at 0% 100%, #14122e 0%, transparent 55%),
  var(--bg);}
.bg__grid{position:absolute;inset:-2px;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 80%);}
.bg__mesh{position:absolute;inset:0;opacity:.6;
  background:conic-gradient(from 180deg at 50% 50%, #1b2a55, #2a1b55, #16323a, #1b2a55);
  filter:blur(120px) saturate(120%);
  animation:spin 38s linear infinite;}
.bg__orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5;mix-blend-mode:screen}
.bg__orb--1{width:340px;height:340px;background:#3b6bff;top:-60px;left:-40px;animation:float1 16s ease-in-out infinite}
.bg__orb--2{width:300px;height:300px;background:#8b5bff;bottom:-80px;right:-40px;animation:float2 19s ease-in-out infinite}
.bg__orb--3{width:240px;height:240px;background:#2dd4bf;top:40%;right:20%;opacity:.3;animation:float1 22s ease-in-out infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes float1{0%,100%{transform:translate(0,0)}50%{transform:translate(30px,40px)}}
@keyframes float2{0%,100%{transform:translate(0,0)}50%{transform:translate(-40px,-30px)}}

/* ── Shell + card ──
   margin:auto centers on BOTH axes inside the flex body, but (unlike align-items:center)
   never clips the top when the card is taller than the viewport — it just scrolls. ── */
.shell{position:relative;z-index:1;width:100%;max-width:440px;margin:auto}
.card{
  background:var(--card);
  border:1px solid var(--card-line);
  border-radius:clamp(18px,4vw,24px);
  padding:clamp(22px,5vw,30px) clamp(18px,5vw,28px) clamp(18px,4vw,22px);
  backdrop-filter:blur(22px) saturate(140%);
  -webkit-backdrop-filter:blur(22px) saturate(140%);
  box-shadow:0 30px 80px -20px rgba(0,0,0,.7), inset 0 1px 0 rgba(255,255,255,.06);
  animation:rise .6s cubic-bezier(.2,.7,.2,1) both;
}
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

/* ── Brand ── */
.brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.brand__mark{
  width:42px;height:42px;border-radius:12px;flex:0 0 auto;
  display:grid;place-items:center;color:#cfe0ff;
  background:linear-gradient(140deg,var(--accent),var(--accent2));
  box-shadow:0 8px 24px -6px var(--ring), inset 0 1px 0 rgba(255,255,255,.3);
}
.brand__name{font-family:var(--latin);font-weight:700;font-size:clamp(1rem,4.5vw,1.12rem);letter-spacing:.2px}
.brand__sub{font-size:clamp(.72rem,3.4vw,.78rem);color:var(--muted)}

/* ── Tabs ── */
.tabs{position:relative;display:grid;grid-template-columns:1fr 1fr;
  background:rgba(255,255,255,.04);border:1px solid var(--card-line);
  border-radius:12px;padding:4px;margin-bottom:18px}
.tab{position:relative;z-index:1;border:none;background:transparent;cursor:pointer;
  font-family:var(--bn);font-weight:600;font-size:.95rem;color:var(--muted);
  padding:11px 0;min-height:44px;border-radius:9px;transition:color .2s}
.tab.is-active{color:#fff}
.tabs__ink{position:absolute;z-index:0;top:4px;left:4px;height:calc(100% - 8px);
  width:calc(50% - 4px);border-radius:9px;
  background:linear-gradient(140deg,rgba(91,140,255,.9),rgba(155,107,255,.9));
  box-shadow:0 6px 18px -6px var(--ring);
  transition:transform .28s cubic-bezier(.3,.8,.3,1)}
.tabs__ink.r{transform:translateX(100%)}

/* ── Alert ── */
.alert{display:none;align-items:flex-start;gap:8px;
  font-size:.86rem;font-weight:500;line-height:1.45;
  padding:11px 13px;border-radius:11px;margin-bottom:14px;
  background:rgba(248,113,113,.12);border:1px solid rgba(248,113,113,.4);color:#fecaca}
.alert.show{display:flex}
.alert.ok{background:rgba(52,211,153,.12);border-color:rgba(52,211,153,.4);color:#bbf7d0}
.alert::before{content:'⚠';flex:0 0 auto}
.alert.ok::before{content:'✓'}

/* ── Forms ── */
.form{display:none;flex-direction:column;gap:15px}
.form.is-active{display:flex;animation:fade .35s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:.82rem;font-weight:600;color:#c2c9de;padding-left:2px}
.input{position:relative;display:flex;align-items:center;
  background:rgba(255,255,255,.04);border:1px solid var(--card-line);
  border-radius:12px;transition:border-color .18s, box-shadow .18s, background .18s}
.input:focus-within{border-color:var(--accent);background:rgba(91,140,255,.06);
  box-shadow:0 0 0 4px rgba(91,140,255,.16)}
.input__icon{color:var(--muted);margin-left:13px;flex:0 0 auto}
/* 16px font-size prevents iOS Safari auto-zoom on focus */
.input input{flex:1;min-width:0;background:transparent;border:none;outline:none;
  color:var(--text);font-family:var(--bn);font-size:16px;padding:13px 12px;min-height:24px}
.input input::placeholder{color:#586079}
.input__toggle{background:transparent;border:none;cursor:pointer;color:var(--muted);
  font-family:var(--bn);font-size:.8rem;font-weight:600;padding:0 13px;align-self:stretch;
  display:flex;align-items:center;white-space:nowrap;min-width:44px;justify-content:flex-end}
.input__toggle:hover{color:var(--accent3)}

/* ── Strength meter + reqs ── */
.meter{height:5px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;margin-top:3px}
.meter span{display:block;height:100%;width:0;border-radius:99px;transition:width .3s, background .3s}
.reqs{list-style:none;display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:4px;padding-left:2px}
.reqs li{position:relative;font-size:.74rem;color:var(--muted);padding-left:16px;transition:color .2s}
.reqs li::before{content:'○';position:absolute;left:0;font-size:.7rem;top:1px}
.reqs li.ok{color:var(--good)}
.reqs li.ok::before{content:'●'}

/* ── Submit ── */
.submit{position:relative;margin-top:6px;border:none;cursor:pointer;
  font-family:var(--bn);font-weight:700;font-size:1rem;color:#fff;
  padding:14px;min-height:50px;border-radius:12px;overflow:hidden;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 12px 30px -10px var(--ring), inset 0 1px 0 rgba(255,255,255,.25);
  transition:transform .12s, box-shadow .2s, filter .2s}
.submit:hover{filter:brightness(1.07);box-shadow:0 16px 38px -10px var(--ring)}
.submit:active{transform:translateY(1px)}
.submit:disabled{cursor:not-allowed;opacity:.7}
.submit__spin{display:none;position:absolute;inset:0;margin:auto;width:20px;height:20px;
  border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;
  animation:rot .7s linear infinite}
.submit.loading .submit__label{opacity:0}
.submit.loading .submit__spin{display:block}
@keyframes rot{to{transform:rotate(360deg)}}

/* ── Success ── */
.done{display:flex;flex-direction:column;align-items:center;text-align:center;gap:13px;padding:14px 0 8px;animation:fade .4s ease}
.done__ring{width:74px;height:74px;border-radius:50%;display:grid;place-items:center;color:#fff;
  background:radial-gradient(circle at 35% 30%,rgba(52,211,153,.35),transparent 60%),linear-gradient(140deg,var(--good),#10b981);
  box-shadow:0 14px 40px -10px rgba(52,211,153,.6);animation:pop .5s cubic-bezier(.2,1.4,.5,1) both}
@keyframes pop{from{transform:scale(.5);opacity:0}to{transform:none;opacity:1}}
.done__title{font-size:1.3rem;font-weight:700}
.done__sub{font-size:.9rem;color:var(--muted)}
.ghost{margin-top:6px;background:transparent;border:1px solid var(--card-line);color:var(--muted);
  font-family:var(--bn);font-weight:600;font-size:.86rem;padding:11px 20px;min-height:44px;border-radius:10px;cursor:pointer;transition:.18s}
.ghost:hover{color:#fff;border-color:var(--accent)}

/* ── Footer ── */
.card__foot{margin-top:18px;padding-top:14px;border-top:1px solid var(--card-line);text-align:center}
.lockline{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:5px 9px;
  color:var(--muted);font-family:var(--mono);font-size:.66rem;letter-spacing:.2px;line-height:1.5}
.lockline svg{color:var(--accent3);flex:0 0 auto}

/* ── Responsive ── */
@media (max-width:420px){
  .brand{gap:10px;margin-bottom:18px}
  .brand__mark{width:38px;height:38px}
  .tab{font-size:.9rem}
  .reqs{gap:5px 10px}
  .reqs li{font-size:.72rem}
  .lockline{font-size:.6rem;gap:4px 7px}
}
@media (max-width:340px){
  .reqs li{font-size:.68rem}
  .field label{font-size:.78rem}
}
/* Short / landscape screens: tighten vertical rhythm so the (taller) register
   form fits, and let it scroll from the top rather than clipping. */
@media (max-height:680px){
  .bg__mesh{opacity:.45}
  .brand{margin-bottom:14px}
  .tabs{margin-bottom:14px}
  .form{gap:12px}
  .card{padding-top:20px;padding-bottom:16px}
}
@media (prefers-reduced-motion:reduce){
  .bg__mesh,.bg__orb{animation:none}
  .card,.form,.done,.done__ring{animation:none}
  .tabs__ink,.meter span{transition:none}
}