:root{
  --bg:#f3f6fb;
  --bg2:#eef3f8;
  --ink:#17202b;
  --muted:#6e7a87;
  --line:rgba(68,86,108,.14);
  --glass:rgba(255,255,255,.66);
  --glass-strong:rgba(255,255,255,.86);
  --accent:#7e9ec5;
  --shadow:0 30px 90px rgba(45,67,94,.14);
}
*{box-sizing:border-box}
html,body{height:100%;overflow:hidden}
body{
  margin:0;color:var(--ink);
  background:
    radial-gradient(circle at 8% 0%,rgba(255,255,255,.96),transparent 34%),
    radial-gradient(circle at 94% 8%,rgba(191,214,237,.58),transparent 31%),
    linear-gradient(145deg,var(--bg),#f9fbfd 48%,var(--bg2));
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif;
  font-weight:300;letter-spacing:-.018em;
}
button,input{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
.auth-app{height:100dvh;position:relative;overflow:hidden;padding:20px 28px 28px}
.ambient{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.ambient>*{position:absolute}
.ambient-ring{border-radius:50%;background:conic-gradient(from 15deg,rgba(125,158,199,.08),rgba(141,183,219,.38),rgba(219,194,232,.20),rgba(125,158,199,.08));filter:hue-rotate(0deg)}
.ring-one{width:520px;height:520px;left:-210px;top:7%;-webkit-mask:radial-gradient(circle,transparent 60%,#000 61% 65%,transparent 66%);mask:radial-gradient(circle,transparent 60%,#000 61% 65%,transparent 66%);animation:ringOne 17s ease-in-out infinite alternate}
.ring-two{width:390px;height:390px;right:-100px;bottom:-100px;-webkit-mask:radial-gradient(circle,transparent 54%,#000 55% 59%,transparent 60%);mask:radial-gradient(circle,transparent 54%,#000 55% 59%,transparent 60%);animation:ringTwo 19s ease-in-out infinite alternate}
.ambient-prism{width:520px;height:250px;right:7%;top:9%;border-radius:58% 42% 52% 48%/48% 55% 45% 52%;background:linear-gradient(115deg,rgba(255,255,255,.08),rgba(144,185,224,.23),rgba(219,196,235,.19),rgba(255,255,255,.05));filter:blur(16px);opacity:.72;transform:rotate(-11deg);animation:prism 14s ease-in-out infinite alternate}
.ambient-line{width:46vw;height:46vw;min-width:420px;min-height:420px;left:28%;bottom:-38vw;border:1px solid rgba(111,143,180,.18);border-radius:50%;box-shadow:0 0 0 60px rgba(255,255,255,.04),0 0 0 120px rgba(111,143,180,.025);animation:lineFloat 20s ease-in-out infinite alternate}
.auth-header{height:58px;position:relative;z-index:5;display:flex;align-items:center;justify-content:space-between;max-width:1320px;margin:0 auto}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:500}
.logo{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(145deg,#fff,#ccd9e7);box-shadow:inset 0 1px 0 #fff,0 8px 20px rgba(70,96,125,.16);font-size:12px;color:#42566f;font-weight:600}
.back-link{color:#657486;text-decoration:none;font-size:14px;padding:9px 12px;border-radius:12px;transition:.2s}
.back-link:hover{background:rgba(255,255,255,.62);color:#263646}
.auth-layout{position:relative;z-index:2;max-width:1240px;height:calc(100% - 58px);margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,520px);gap:7vw;align-items:center}
.intro{max-width:640px;padding-left:2vw}
.intro-kicker{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border-radius:999px;background:rgba(255,255,255,.62);border:1px solid rgba(255,255,255,.92);font-size:13px;color:#607187}
.intro-kicker i{width:7px;height:7px;border-radius:50%;background:#8fa8c4;box-shadow:0 0 0 5px rgba(143,168,196,.12)}
.intro h1{font-size:clamp(54px,6.1vw,92px);font-weight:250;line-height:.94;letter-spacing:-.062em;margin:22px 0 24px}
.intro>p{font-size:18px;line-height:1.55;color:#64717e;max-width:590px;margin:0}
.intro-meta{display:flex;gap:9px;flex-wrap:wrap;margin-top:30px}
.intro-meta span{font-size:12px;color:#718093;padding:8px 11px;border:1px solid rgba(255,255,255,.96);background:rgba(255,255,255,.52);border-radius:999px}
.auth-card{position:relative;width:100%;padding:20px 24px 18px;background:rgba(255,255,255,.64);border:1px solid rgba(255,255,255,.96);border-radius:30px;backdrop-filter:blur(30px) saturate(135%);box-shadow:var(--shadow)}
.tabs{display:grid;grid-template-columns:1fr 1fr;padding:4px;background:rgba(229,236,244,.68);border-radius:15px;margin-bottom:22px}
.tab{border:0;background:transparent;color:#728092;padding:10px 14px;border-radius:12px;cursor:pointer;transition:.2s;font-weight:450}
.tab.active{background:rgba(255,255,255,.94);color:#213143;box-shadow:0 6px 18px rgba(62,82,107,.08)}
.form-view{display:none}
.form-view.active{display:block}
.form-heading{margin-bottom:18px}
.form-heading h2{font-size:31px;font-weight:300;letter-spacing:-.04em;margin:0 0 6px}
.form-heading p{font-size:13px;color:#798593;line-height:1.45;margin:0}
.form-heading.compact{margin-bottom:14px}
.field{display:block;margin-bottom:12px}
.field>span{display:block;color:#6f7c8a;font-size:12px;margin:0 0 6px}
.field input{width:100%;height:46px;border:1px solid rgba(74,93,114,.13);background:rgba(247,249,252,.86);border-radius:14px;padding:0 14px;color:#1c2936;outline:none;transition:.2s}
.field input:focus{border-color:#95abc2;box-shadow:0 0 0 4px rgba(149,171,194,.12);background:#fff}
.password-field{position:relative}
.password-field input{padding-right:82px}
.password-toggle{position:absolute;right:7px;top:7px;height:32px;border:0;background:transparent;color:#718297;font-size:11px;cursor:pointer;border-radius:9px;padding:0 8px}
.password-toggle:hover{background:rgba(225,233,241,.7)}
.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.form-row{display:flex;align-items:center;justify-content:space-between;margin:2px 0 15px}
.remember{display:flex;align-items:center;gap:7px;color:#748191;font-size:12px}
.remember input,.consent input{accent-color:#536f91}
.text-button,.inline-link,.switch-copy button{border:0;background:transparent;color:#5b7390;cursor:pointer;padding:0;text-decoration:none}
.text-button:hover,.inline-link:hover,.switch-copy button:hover{text-decoration:underline;text-underline-offset:3px}
.text-button{font-size:12px}
.submit-button{width:100%;height:46px;border:0;border-radius:14px;background:#172535;color:white;cursor:pointer;font-weight:500;box-shadow:0 10px 24px rgba(23,37,53,.18);transition:.2s}
.submit-button:hover{transform:translateY(-1px);box-shadow:0 13px 28px rgba(23,37,53,.22)}
.consent{display:flex;gap:9px;align-items:flex-start;font-size:11.5px;line-height:1.42;color:#71808f;margin:2px 0 12px}
.consent input{margin-top:2px;flex:0 0 auto}
.inline-link{font-size:inherit}
.switch-copy{text-align:center;color:#84909c;font-size:12px;margin:14px 0 0}
.form-message{min-height:16px;font-size:11.5px;margin-top:8px;color:#758494;text-align:center}
.form-message.error{color:#985f62}
.form-message.success{color:#557660}
.session-actions{display:grid;gap:10px;margin-top:16px}
.session-link{display:flex;align-items:center;justify-content:center;text-decoration:none}
.secondary-button{width:100%;height:44px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.62);color:#5e6e7f;cursor:pointer}
.secondary-button:hover{background:rgba(255,255,255,.88)}
.demo-note{border-top:1px solid var(--line);padding-top:12px;margin-top:15px;color:#9099a3;font-size:10.5px;line-height:1.4;text-align:center}
.dialog-backdrop{position:fixed;inset:0;z-index:50;background:rgba(43,54,66,.2);backdrop-filter:blur(16px);display:none;align-items:center;justify-content:center;padding:24px}
.dialog-backdrop.show{display:flex}
.dialog{width:min(520px,100%);padding:28px;border-radius:28px;background:rgba(255,255,255,.92);border:1px solid #fff;box-shadow:0 36px 100px rgba(40,58,79,.23)}
.dialog-kicker{font-size:11px;color:#8794a2;text-transform:uppercase;letter-spacing:.12em}
.dialog h2{font-size:28px;font-weight:300;letter-spacing:-.04em;margin:7px 0 18px}
.dialog-copy{color:#657382;font-size:13px;line-height:1.6;margin-bottom:22px}
.toast{position:fixed;right:24px;bottom:24px;z-index:60;background:#172535;color:white;border-radius:14px;padding:12px 15px;font-size:12px;opacity:0;transform:translateY(10px);pointer-events:none;transition:.22s;box-shadow:0 14px 36px rgba(23,37,53,.2)}
.toast.show{opacity:1;transform:none}
@keyframes ringOne{to{transform:translate3d(38px,-24px,0) rotate(14deg) scale(1.06);filter:hue-rotate(24deg)}}
@keyframes ringTwo{to{transform:translate3d(-30px,-26px,0) rotate(-16deg) scale(1.04);filter:hue-rotate(-18deg)}}
@keyframes prism{to{transform:translate3d(-30px,22px,0) rotate(-4deg) scale(1.08);filter:blur(19px) hue-rotate(22deg)}}
@keyframes lineFloat{to{transform:translate3d(24px,-18px,0) scale(1.03)}}
@media(max-height:760px){
  .auth-app{padding-top:14px;padding-bottom:18px}
  .auth-header{height:48px}
  .auth-layout{height:calc(100% - 48px)}
  .intro h1{font-size:clamp(46px,5.6vw,76px);margin:16px 0 18px}
  .intro>p{font-size:16px}
  .intro-meta{margin-top:20px}
  .auth-card{padding:17px 21px 14px}
  .tabs{margin-bottom:16px}
  .field{margin-bottom:9px}
  .field input{height:42px}
  .submit-button{height:43px}
  .form-heading{margin-bottom:13px}
  .form-heading h2{font-size:27px}
}
@media(max-width:900px){
  .auth-app{padding:14px 18px 20px}
  .auth-layout{grid-template-columns:1fr;gap:18px;align-content:center}
  .intro{padding:0;text-align:center;margin:0 auto}
  .intro-kicker,.intro-meta{display:none}
  .intro h1{font-size:clamp(40px,8vw,64px);margin:0 0 12px}
  .intro>p{font-size:14px;max-width:520px}
  .auth-card{max-width:520px;margin:0 auto}
}
@media(max-width:560px){
  .auth-app{padding:10px 12px 14px}
  .auth-header{height:44px}
  .brand span:last-child{display:none}
  .back-link{font-size:12px}
  .auth-layout{height:calc(100% - 44px);align-content:center;gap:12px}
  .intro h1{font-size:36px;line-height:.96;margin-bottom:8px}
  .intro>p{font-size:12.5px;line-height:1.4}
  .auth-card{padding:14px 15px 12px;border-radius:24px}
  .tabs{margin-bottom:12px}
  .tab{padding:8px 10px}
  .form-heading h2{font-size:24px}
  .form-heading p{font-size:11.5px}
  .field{margin-bottom:8px}
  .field input{height:40px;border-radius:12px;font-size:13px}
  .two-fields{grid-template-columns:1fr;gap:0}
  .submit-button{height:41px}
  .form-row{margin-bottom:11px}
  .switch-copy{margin-top:10px}
  .demo-note{margin-top:10px;padding-top:9px;font-size:9.5px}
  .ring-one{width:330px;height:330px;left:-170px}
  .ring-two{width:260px;height:260px;right:-120px}
  .ambient-prism{width:300px;height:160px;right:-90px}
}


/* Registration transition: empty canvas + centered expanding card */
.auth-app::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:rgba(247,249,252,0);
  transition:background .42s ease;
}
.ambient{
  transition:opacity .46s ease,filter .46s ease,transform .46s ease;
}
.auth-header{
  transition:opacity .32s ease,transform .42s cubic-bezier(.2,.8,.2,1);
}
.intro{
  transition:opacity .32s ease,transform .46s cubic-bezier(.2,.8,.2,1),filter .38s ease;
}
.auth-card{
  z-index:3;
  transition:
    max-width .5s cubic-bezier(.2,.8,.2,1),
    width .5s cubic-bezier(.2,.8,.2,1),
    padding .5s cubic-bezier(.2,.8,.2,1),
    border-radius .5s cubic-bezier(.2,.8,.2,1),
    box-shadow .5s ease,
    background .5s ease;
  will-change:transform,width;
}
.form-view{
  transform-origin:center top;
}
.form-view.active{
  animation:formStructureIn .34s cubic-bezier(.2,.8,.2,1);
}
.auth-app.register-mode::before{
  background:#f7f9fc;
}
.auth-app.register-mode .ambient{
  opacity:0;
  filter:blur(18px);
  transform:scale(1.04);
}
.auth-app.register-mode .auth-header{
  position:absolute;
  left:28px;
  right:28px;
  top:20px;
  width:auto;
  max-width:none;
  opacity:0;
  transform:translateY(-12px);
  pointer-events:none;
}
.auth-app.register-mode .auth-layout{
  height:100%;
  max-width:none;
  margin:0;
  display:flex;
  align-items:center;
  justify-content:center;
}
.auth-app.register-mode .intro{
  position:absolute;
  opacity:0;
  transform:translateX(-32px) scale(.97);
  filter:blur(8px);
  pointer-events:none;
}
.auth-app.register-mode .auth-card{
  width:min(680px,calc(100vw - 40px));
  max-width:680px;
  padding:28px 30px 22px;
  border-radius:32px;
  background:rgba(255,255,255,.86);
  border-color:rgba(255,255,255,.98);
  box-shadow:0 12px 34px rgba(44,64,88,.075),0 2px 8px rgba(44,64,88,.035);
}
.auth-app.register-mode .tabs{
  margin-bottom:24px;
}
.auth-app.register-mode .form-heading{
  margin-bottom:20px;
}
.auth-app.register-mode .form-heading h2{
  font-size:34px;
}
.auth-app.register-mode .field{
  margin-bottom:13px;
}
.auth-app.register-mode .field input{
  height:48px;
}
.auth-app.register-mode .submit-button{
  height:48px;
}
@keyframes formStructureIn{
  from{opacity:.2;transform:translateY(10px) scale(.985)}
  to{opacity:1;transform:none}
}
@media(max-height:760px){
  .auth-app.register-mode .auth-card{
    width:min(640px,calc(100vw - 32px));
    max-width:640px;
    padding:20px 24px 16px;
  }
  .auth-app.register-mode .tabs{margin-bottom:14px}
  .auth-app.register-mode .form-heading{margin-bottom:12px}
  .auth-app.register-mode .form-heading h2{font-size:28px}
  .auth-app.register-mode .field{margin-bottom:8px}
  .auth-app.register-mode .field input{height:41px}
  .auth-app.register-mode .submit-button{height:42px}
}
@media(max-width:560px){
  .auth-app.register-mode .auth-layout{height:100%}
  .auth-app.register-mode .auth-card{
    width:calc(100vw - 24px);
    max-width:none;
    padding:16px 16px 13px;
    border-radius:24px;
    box-shadow:0 10px 26px rgba(44,64,88,.07);
  }
  .auth-app.register-mode .form-heading h2{font-size:25px}
}