:root{
  --ground:#f5f7fb;--surface:#fff;--ink:#16191f;--sub:#686e78;--faint:#9197a1;
  --line:#e3e7ee;--accent:#0a5cff;--accent-2:#0648cf;--tint:#edf3ff;
  --danger:#d83c36;--danger-bg:#fff0ef;--ok:#178b58;
  --shadow:0 24px 70px rgba(23,36,68,.12),0 3px 12px rgba(23,36,68,.05);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
:root[data-theme=dark]{
  --ground:#090b10;--surface:#151820;--ink:#f5f7fb;--sub:#a8afbb;--faint:#777f8b;
  --line:#2b303b;--accent:#4c8dff;--accent-2:#73a6ff;--tint:#17233d;
  --danger:#ff7169;--danger-bg:#2d1719;--ok:#48c98d;
  --shadow:0 28px 80px rgba(0,0,0,.4);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{min-height:100%}
body{font-family:var(--sans);color:var(--ink);background:var(--ground);-webkit-font-smoothing:antialiased}
button,input{font:inherit;color:inherit}button{cursor:pointer}
[hidden]{display:none!important}
.auth-shell{min-height:100vh;display:grid;grid-template-columns:minmax(380px,44%) 1fr}
.intro{position:relative;overflow:hidden;padding:42px clamp(34px,5vw,76px);color:#fff;
  background:linear-gradient(145deg,#081e55 0%,#073fb7 52%,#0a64ff 100%);display:flex;flex-direction:column}
.intro::before{content:"";position:absolute;width:580px;height:580px;border:1px solid rgba(255,255,255,.11);
  border-radius:50%;right:-330px;top:-190px;box-shadow:0 0 0 78px rgba(255,255,255,.035),0 0 0 156px rgba(255,255,255,.025)}
.intro::after{content:"";position:absolute;width:330px;height:330px;border-radius:50%;left:-210px;bottom:-210px;
  background:rgba(255,255,255,.08);box-shadow:0 0 90px rgba(79,157,255,.7)}
.brand{position:relative;z-index:1;display:flex;align-items:center;gap:10px;font-size:17px;font-weight:740;letter-spacing:.02em}
.brand em{font-style:normal;font-size:13px;font-weight:450;color:rgba(255,255,255,.66);padding-left:10px;border-left:1px solid rgba(255,255,255,.25)}
.brand-mark{width:31px;height:31px;border:1px solid rgba(255,255,255,.5);border-radius:9px;display:grid;place-items:center;transform:rotate(45deg)}
.brand-mark i{position:absolute;width:15px;height:4px;border-radius:3px;background:#fff;transform:rotate(-45deg) translateY(-3px)}
.brand-mark i+ i{transform:rotate(-45deg) translateY(4px);width:10px}
.intro-copy{position:relative;z-index:1;margin:auto 0;max-width:560px;padding:70px 0}
.eyebrow{text-transform:uppercase;font-size:12px;font-weight:700;letter-spacing:.18em;color:#a9c9ff;margin-bottom:20px}
.intro h1{font-size:clamp(34px,4.2vw,58px);line-height:1.16;letter-spacing:-.035em;font-weight:750}
.lead{margin-top:24px;max-width:480px;color:rgba(255,255,255,.72);font-size:16px;line-height:1.8}
.features{margin-top:45px;display:grid;gap:17px}
.features>div{display:flex;align-items:center;gap:14px}.features p{display:grid;gap:2px}
.features b{font-size:14px;font-weight:650}.features small{font-size:12px;color:rgba(255,255,255,.58)}
.feature-icon{display:grid;place-items:center;width:39px;height:39px;border:1px solid rgba(255,255,255,.18);border-radius:11px;background:rgba(255,255,255,.08)}
.feature-icon svg{width:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.intro-foot{position:relative;z-index:1;font-size:11px;letter-spacing:.05em;color:rgba(255,255,255,.42)}
.auth-side{position:relative;display:grid;place-items:center;padding:50px clamp(24px,7vw,100px)}
.theme{position:absolute;right:28px;top:25px;width:38px;height:38px;display:grid;place-items:center;border:1px solid var(--line);border-radius:11px;background:var(--surface);color:var(--sub)}
.theme:hover{color:var(--ink);border-color:var(--faint)}.theme svg{width:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.auth-card{width:min(100%,470px)}.mobile-brand{display:none}
.heading .kicker{font-size:12px;font-weight:720;letter-spacing:.12em;color:var(--accent);margin-bottom:10px}
.heading h2{font-size:31px;line-height:1.2;letter-spacing:-.025em}.heading>p:last-child{font-size:14px;color:var(--sub);margin-top:10px}
.tabs{margin:31px 0 24px;display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line)}
.tabs button{position:relative;border:0;background:transparent;color:var(--faint);padding:11px;font-weight:600}
.tabs button::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--accent);transform:scaleX(0);transition:transform .2s}
.tabs button.on{color:var(--ink)}.tabs button.on::after{transform:scaleX(1)}
.notice,.message{border-radius:10px;font-size:12.5px;line-height:1.5;padding:10px 12px;margin-bottom:17px}
.notice{background:var(--tint);color:var(--accent-2)}.notice span{font-weight:700;margin-right:7px}
.message{background:var(--danger-bg);color:var(--danger);border:1px solid color-mix(in srgb,var(--danger) 18%,transparent)}
form{display:grid;gap:17px}.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{display:grid;gap:7px}.field>span:first-child{font-size:12.5px;font-weight:620}.field small{font-size:11px;font-weight:450;color:var(--faint)}
.control{position:relative;display:block}.control>svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:18px;fill:none;stroke:var(--faint);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.control input{width:100%;height:46px;border:1px solid var(--line);background:var(--surface);border-radius:11px;outline:0;padding:0 53px 0 42px;transition:border-color .15s,box-shadow .15s}
.control input::placeholder{color:var(--faint)}.control input:hover{border-color:color-mix(in srgb,var(--faint) 65%,var(--line))}
.control input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 13%,transparent)}
.reveal{position:absolute;right:8px;top:50%;transform:translateY(-50%);border:0;background:transparent;color:var(--faint);font-size:11px;padding:7px}
.reveal:hover{color:var(--ink)}
.strength{height:3px!important;border-radius:3px;background:var(--line);overflow:hidden}.strength i{display:block;width:0;height:100%;background:var(--danger);transition:.2s}
.check{justify-self:start;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--sub);cursor:pointer;user-select:none}.check input{position:absolute;opacity:0}
.check span{width:16px;height:16px;border:1px solid var(--line);background:var(--surface);border-radius:5px;display:grid;place-items:center}
.check input:checked+span{border-color:var(--accent);background:var(--accent)}.check input:checked+span::after{content:"";width:7px;height:4px;border-left:1.7px solid #fff;border-bottom:1.7px solid #fff;transform:translateY(-1px) rotate(-45deg)}
.check input:focus-visible+span{box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 17%,transparent)}
.submit{height:48px;border:0;border-radius:11px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;gap:9px;font-weight:650;box-shadow:0 8px 20px color-mix(in srgb,var(--accent) 26%,transparent);transition:.15s}
.submit:hover{background:var(--accent-2);transform:translateY(-1px)}.submit:active{transform:none}.submit:disabled{opacity:.7;cursor:wait;transform:none}
.submit svg{width:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.submit.loading svg{width:17px;height:17px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .75s linear infinite}
.submit.loading svg path{display:none}
.rules{text-align:center;color:var(--faint);font-size:11px}
.secure-note{display:flex;align-items:center;justify-content:center;gap:7px;margin-top:25px;padding-top:20px;border-top:1px solid var(--line);color:var(--faint);font-size:11px}
.secure-note svg{width:14px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:900px){.auth-shell{grid-template-columns:1fr}.intro{display:none}.auth-side{min-height:100vh;padding:70px 22px 35px}.auth-card{max-width:480px}.mobile-brand{display:flex;align-items:center;gap:8px;margin-bottom:45px;font-size:14px;font-weight:700}.mobile-brand .dot{width:8px;height:20px;border-radius:3px;background:var(--accent)}.theme{right:18px;top:18px}}
@media(max-width:480px){.two-fields{grid-template-columns:1fr}.heading h2{font-size:27px}.auth-side{place-items:start center}.mobile-brand{margin-bottom:34px}.tabs{margin-top:27px}.secure-note{align-items:flex-start}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}