:root{
  --bg:#02040c; --ink:#f2f5ff; --mut:#8c97b8; --line:rgba(150,170,255,.16);
  --blue:#2f4bff; --blue-2:#1a2a8f; --err:#ff6b81; --ok:#4ade9d;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:Inter,system-ui,sans-serif;font-weight:300;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}
h1,h2,h3,.logo{font-family:"Inter Tight",sans-serif;letter-spacing:-.03em}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}

.auth{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);min-height:100vh}

/* form side */
.pane{display:flex;flex-direction:column;padding:34px 56px 30px;position:relative;
  background:radial-gradient(700px 500px at -10% -10%,rgba(47,75,255,.35),transparent 60%),var(--bg)}
.top{display:flex;justify-content:space-between;align-items:center}
.logo{display:flex;align-items:center;gap:12px;font-weight:500;font-size:15px}
.logo svg{width:28px;height:28px}
.back{font-size:14px;color:var(--mut);transition:.2s}.back:hover{color:#fff}
.formwrap{flex:1;display:flex;flex-direction:column;justify-content:center;width:100%;max-width:440px;margin:0 auto;padding:40px 0}
.formwrap h1{font-weight:300;font-size:clamp(34px,4vw,48px);line-height:1.05;margin-bottom:12px}
.formwrap h1 b{font-weight:300;color:#8ea2ff}
.lead{color:var(--mut);font-size:16px;margin-bottom:34px}

.alert{padding:13px 16px;border-radius:14px;border:1px solid rgba(255,107,129,.4);background:rgba(255,107,129,.08);color:#ffb3bf;font-size:14px;margin-bottom:22px;font-weight:400}
.alert:empty{display:none}
.alert.ok{border-color:rgba(74,222,157,.4);background:rgba(74,222,157,.08);color:#9ff0c9}

form{display:grid;gap:18px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.f label{display:flex;justify-content:space-between;font-size:13px;color:#b6c1e6;margin-bottom:8px;font-weight:400}
.f label a{color:#8ea2ff}.f label a:hover{text-decoration:underline}
.in{position:relative}
.in input,.in select{width:100%;height:52px;padding:0 18px;border-radius:14px;border:1px solid var(--line);background:rgba(14,22,70,.35);color:#fff;font:400 15px Inter,sans-serif;outline:0;transition:.2s;appearance:none;-webkit-appearance:none}
.in select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='none' stroke='%238c97b8' stroke-width='1.6'%3E%3Cpath d='M2 5l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:40px}
.in select option{background:#0a1038;color:#fff}
.in input::placeholder{color:#55618c}
.in input:hover,.in select:hover{border-color:rgba(150,170,255,.32)}
.in input:focus,.in select:focus{border-color:#5b78ff;background:rgba(20,32,100,.45);box-shadow:0 0 0 4px rgba(47,75,255,.18)}
.f.bad input,.f.bad select{border-color:var(--err)}
.err{color:var(--err);font-size:12.5px;margin-top:6px;min-height:0;font-weight:400}
.err:empty{display:none}
.eye{position:absolute;right:6px;top:6px;width:40px;height:40px;border:0;background:none;color:var(--mut);cursor:pointer;border-radius:10px;display:grid;place-items:center}
.eye:hover{color:#fff}.eye svg{width:19px;height:19px}
.in.pw input{padding-right:52px}

.meter{display:flex;gap:5px;margin-top:10px}
.meter i{flex:1;height:3px;border-radius:2px;background:rgba(150,170,255,.15);transition:.3s}
.meter[data-s="1"] i:nth-child(-n+1){background:#ff6b81}
.meter[data-s="2"] i:nth-child(-n+2){background:#ffb454}
.meter[data-s="3"] i:nth-child(-n+3){background:#7fa0ff}
.meter[data-s="4"] i{background:var(--ok)}
.hint{font-size:12.5px;color:var(--mut);margin-top:7px}

.types{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.types input{position:absolute;opacity:0;pointer-events:none}
.types label{display:block;cursor:pointer;margin:0;padding:16px 18px;border-radius:14px;border:1px solid var(--line);background:rgba(14,22,70,.3);transition:.2s;color:#fff}
.types label b{display:block;font:400 16px "Inter Tight";letter-spacing:-.01em}
.types label small{color:var(--mut);font-size:12.5px;font-weight:300}
.types label:hover{border-color:rgba(150,170,255,.35)}
.types input:checked+label{border-color:#5b78ff;background:rgba(47,75,255,.2);box-shadow:0 0 0 4px rgba(47,75,255,.14)}
.types input:focus-visible+label{outline:2px solid #8ea2ff;outline-offset:2px}

.f label.chk{justify-content:flex-start;margin:0;color:#aab4d6}
.chk{display:flex;gap:12px;align-items:flex-start;font-size:13.5px;color:#aab4d6;cursor:pointer;font-weight:300}
.chk input{appearance:none;-webkit-appearance:none;flex:none;width:20px;height:20px;border-radius:6px;border:1px solid rgba(150,170,255,.35);background:rgba(14,22,70,.35);margin-top:2px;cursor:pointer;display:grid;place-items:center;transition:.2s}
.chk input:checked{background:var(--blue);border-color:var(--blue)}
.chk input:checked::after{content:"";width:5px;height:10px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg) translate(-1px,-1px)}
.chk a{color:#8ea2ff}.chk a:hover{text-decoration:underline}
.between{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.between a{font-size:13.5px;color:#8ea2ff}

.btn{height:54px;border-radius:999px;border:1px solid rgba(140,160,255,.4);background:linear-gradient(180deg,#3a55ff,var(--blue-2));color:#fff;font:500 16px Inter,sans-serif;cursor:pointer;transition:.3s;box-shadow:0 14px 40px -14px rgba(47,75,255,.95);display:flex;align-items:center;justify-content:center;gap:10px;width:100%}
.btn:hover{transform:translateY(-2px);box-shadow:0 18px 50px -12px rgba(47,75,255,1)}
.btn:disabled{opacity:.6;cursor:wait;transform:none}
.btn .sp{width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:none}
.btn.load .sp{display:block}
@keyframes spin{to{transform:rotate(360deg)}}
.swap{margin-top:26px;text-align:center;color:var(--mut);font-size:14.5px}
.swap a{color:#fff;font-weight:400;border-bottom:1px solid rgba(255,255,255,.35)}.swap a:hover{border-color:#8ea2ff;color:#8ea2ff}
.foot{display:flex;justify-content:space-between;color:#5d6a94;font-size:12.5px;flex-wrap:wrap;gap:8px}

/* visual side */
.vis{position:relative;overflow:hidden;border-left:1px solid var(--line);background:#02040c}
.vis img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.vis::before{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(2,4,12,.35),rgba(2,4,12,.1) 40%,rgba(2,4,12,.9)),linear-gradient(90deg,rgba(2,4,12,.7),transparent 35%)}
.vis .cap{position:absolute;z-index:2;left:56px;right:56px;bottom:50px}
.vis h2{font-weight:300;font-size:clamp(28px,3vw,44px);line-height:1.08;max-width:520px}
.vis h2 b{font-weight:300;color:#8ea2ff}
.vstats{display:flex;gap:44px;margin-top:34px}
.vstats div{border-top:1px solid var(--line);padding-top:14px;min-width:100px}
.vstats strong{display:block;font:300 34px "Inter Tight";letter-spacing:-.04em;line-height:1}
.vstats small{color:var(--mut);font-size:12.5px}
.chip{position:absolute;z-index:2;top:34px;right:36px;padding:10px 18px;border-radius:999px;background:rgba(10,16,50,.5);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--line);font-size:13px;display:flex;align-items:center;gap:10px;font-weight:400}
.chip i{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 12px var(--ok)}

@media(max-width:960px){
  .auth{grid-template-columns:1fr}
  .vis{display:none}
  .pane{padding:26px 22px}
}
@media(max-width:480px){.row2,.types{grid-template-columns:1fr}}

/* ===== MOTION ===== */
:root{--ease:cubic-bezier(.2,.8,.2,1)}
@keyframes rise{from{opacity:0;transform:translateY(22px)}}
@keyframes fadeIn{from{opacity:0}}
@keyframes visIn{from{opacity:0;transform:scale(1.14)}}
@keyframes kenburns{from{transform:scale(1) translate3d(0,0,0)}to{transform:scale(1.07) translate3d(-1.2%,1%,0)}}
@keyframes shake{0%,100%{transform:none}20%{transform:translateX(-6px)}40%{transform:translateX(5px)}60%{transform:translateX(-3px)}80%{transform:translateX(2px)}}
@keyframes blink{50%{opacity:.35}}

.top{animation:fadeIn 1s .1s both}
.formwrap>*{animation:rise .9s var(--ease) both}
.formwrap>h1{animation-delay:.15s}
.formwrap>.lead{animation-delay:.25s}
.formwrap>.alert:not(:empty){animation-delay:.3s}
.formwrap>form{animation:none}
.formwrap>.swap{animation-delay:1s}
.foot{animation:fadeIn 1s 1.1s both}
form>*{animation:rise .8s var(--ease) both}
form>*:nth-child(1){animation-delay:.3s}
form>*:nth-child(2){animation-delay:.38s}
form>*:nth-child(3){animation-delay:.46s}
form>*:nth-child(4){animation-delay:.54s}
form>*:nth-child(5){animation-delay:.62s}
form>*:nth-child(6){animation-delay:.7s}
form>*:nth-child(7){animation-delay:.78s}
form>*:nth-child(8){animation-delay:.86s}
form>*:nth-child(9){animation-delay:.94s}

.vis img{animation:visIn 1.9s var(--ease) both,kenburns 26s ease-in-out 1.9s infinite alternate}
.vis .chip{animation:rise .9s var(--ease) .9s both}
.vis .chip i{animation:blink 2.4s ease-in-out infinite}
.vis h2{animation:rise 1s var(--ease) .7s both}
.vstats{animation:rise 1s var(--ease) 1s both}

/* interactions */
.f:focus-within>label{color:#fff}
.f label{transition:color .2s}
.f.bad .in{animation:shake .45s}
.alert:not(:empty){animation:rise .5s var(--ease) both}
.btn{position:relative;overflow:hidden}
.btn::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 35%,rgba(255,255,255,.28) 50%,transparent 65%);transform:translateX(-130%);pointer-events:none}
.btn:hover::after{transform:translateX(130%);transition:transform .9s var(--ease)}
.types label{transition:border-color .25s,background .25s,box-shadow .25s,transform .35s var(--ease)}
.types input:checked+label{transform:translateY(-3px)}
.chk input:checked{animation:pop .35s var(--ease)}
@keyframes pop{50%{transform:scale(1.25)}}
.eye{transition:color .2s,transform .2s}.eye:active{transform:scale(.9)}
.swap a,.back,.between a{transition:color .2s,border-color .2s}
.back::before{content:"";}

/* page leave */
.leaving .formwrap,.leaving .top,.leaving .foot{opacity:0;transform:translateY(-14px);transition:opacity .25s ease,transform .25s ease;animation:none}
.leaving .vis{opacity:0;transition:opacity .3s ease}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}