:root{
  --canvas:#F0F4F9; --card:#FFFFFF; --ink:#1F1F1F; --ink2:#444746;
  --line:#747775; --blue:#0B57D0; --blue-h:#0A4EC0; --err:#B3261E;
  --hover:#F2F2F2; --ease:cubic-bezier(.2,0,0,1);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;min-height:100vh;background:var(--canvas);color:var(--ink);
  font:400 16px/1.5 Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;display:flex;flex-direction:column;
}
h1,.btn,.link,.lang{font-family:"Google Sans","Product Sans",Roboto,Arial,sans-serif}
.stage{flex:1;display:flex;align-items:center;justify-content:center;padding:24px}
.card{
  width:100%;max-width:448px;background:var(--card);border-radius:28px;
  padding:48px 40px 36px;
  box-shadow:0 1px 2px rgba(0,0,0,.03),0 4px 12px rgba(0,0,0,.05);
}
.brand{display:flex;justify-content:center;margin-bottom:16px}
h1{font-size:28px;line-height:1.29;font-weight:400;text-align:center;margin:0 0 8px}
#subtitle{font-size:16px;line-height:1.5;color:var(--ink2);text-align:center;margin:0 0 32px}
.identity{
  display:inline-flex;align-items:center;gap:8px;margin:0 auto 24px;padding:6px 14px;
  border:1px solid #C4C7C5;border-radius:100px;font-size:14px;color:var(--ink);
  max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.card .identity{margin-left:auto;margin-right:auto}
.field{position:relative;margin-bottom:4px}
.field input{
  width:100%;height:56px;padding:22px 16px 8px;font:400 16px/1 Roboto,Arial,sans-serif;
  color:var(--ink);background:transparent;border:1px solid var(--line);border-radius:4px;
  outline:none;transition:border-color .1s linear;
}
.field input:focus{border-color:var(--blue);box-shadow:inset 0 0 0 1px var(--blue)}
.field label{
  position:absolute;left:16px;top:17px;font-size:16px;color:var(--ink2);
  pointer-events:none;background:var(--card);padding:0 4px;margin-left:-4px;
  transition:top .12s var(--ease),font-size .12s var(--ease),color .12s linear;
}
.field input:focus + label,
.field input.filled + label{top:-8px;font-size:12px}
.field input:focus + label{color:var(--blue)}
.field.invalid input{border-color:var(--err);box-shadow:none}
.field.invalid input:focus{box-shadow:inset 0 0 0 1px var(--err)}
.field.invalid label{color:var(--err)}
.shake{animation:shake .3s var(--ease)}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-6px)}
40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(4px)}}

.err{
  display:flex;gap:8px;align-items:flex-start;color:var(--err);font-size:12px;line-height:1.34;
  max-height:0;opacity:0;overflow:hidden;transition:max-height .19s var(--ease),opacity .12s linear;
}
.err.show{max-height:48px;opacity:1;margin-top:8px}
.err svg{flex:0 0 16px;margin-top:1px}
.reveal{display:flex;align-items:center;gap:8px;margin-top:12px;font-size:14px;color:var(--ink2)}
.reveal input{width:16px;height:16px;accent-color:var(--blue)}
.link{color:var(--blue);font-weight:500;font-size:14px;text-decoration:none;border-radius:8px}
.link:hover{text-decoration:underline}
.left{display:block;margin-top:12px;width:max-content;padding:4px 0}
.guest{font-size:12px;color:var(--ink2);margin:20px 0 8px;line-height:1.4}
.row{display:flex;align-items:center;justify-content:space-between;margin-top:28px;gap:12px}
.create{font-size:14px;padding:8px 0}
.btn{
  height:40px;padding:0 24px;border:0;border-radius:100px;background:var(--blue);
  color:#fff;font-size:14px;font-weight:500;letter-spacing:.25px;cursor:pointer;
  transition:background .12s linear,box-shadow .12s linear;
}
.btn:hover{background:var(--blue-h);box-shadow:0 1px 3px rgba(0,0,0,.24)}
.btn:focus-visible{outline:3px solid #A8C7FA;outline-offset:1px}
.alts{display:flex;flex-direction:column;margin-top:8px}
.alt{
  text-align:left;background:none;border:0;padding:12px;border-radius:8px;
  font:500 14px/1.3 "Google Sans",Roboto,Arial,sans-serif;color:var(--blue);cursor:pointer;
}
.alt:hover{background:var(--hover)}
footer{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 24px;height:64px;font-size:12px;color:var(--ink2);
}
.lang{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:8px;cursor:pointer}
.lang:hover{background:var(--hover)}
.caret{border:4px solid transparent;border-top-color:var(--ink2);margin-top:4px}
footer nav{display:flex;gap:28px}
footer nav a{color:var(--ink2);text-decoration:none;padding:6px 4px;border-radius:6px}
footer nav a:hover{background:var(--hover);text-decoration:underline}
@media (max-width:600px){
  .stage{padding:0}
  .card{max-width:none;min-height:100%;border-radius:0;box-shadow:none;padding:24px;
        display:flex;flex-direction:column}
  .row{margin-top:auto;padding-top:24px}
  footer{padding:0 12px}
  footer nav{gap:14px}
}