@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap");

:root{
  --stage:#000000;
  --panel:#1d1d1f;
  --paper:#f5f5f7;
  --gray:#86868b;
  --gray-dark:#6e6e73;
  --blue:#2997ff;
  --blue-press:#0071e3;
  --line:rgba(255,255,255,.13);
  --line-soft:rgba(255,255,255,.07);
  --danger:#ff6b6b;
  --success:#7dd3a8;
  --sans:"SF Pro Display","PingFang SC","Noto Sans SC","Segoe UI","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--stage);color:var(--paper);font-family:var(--sans);
  font-weight:400;line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
::selection{background:var(--blue);color:#fff}

.auth-nav{
  position:fixed;top:0;left:0;right:0;z-index:20;height:50px;
  background:rgba(0,0,0,.72);backdrop-filter:blur(22px) saturate(1.2);
  -webkit-backdrop-filter:blur(22px) saturate(1.2);
  border-bottom:1px solid rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:space-between;padding:0 32px;
}
.auth-brand{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;letter-spacing:.02em}
.auth-brand::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--blue);box-shadow:0 0 10px rgba(41,151,255,.75)}
.auth-back{font-size:12px;color:var(--gray)}
.auth-back:hover{color:var(--paper)}

.auth-shell{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:92px 24px 56px;
}
.auth-card{
  width:min(430px,100%);background:#0f0f12;border:1px solid var(--line);
  border-radius:16px;padding:34px 32px 30px;box-shadow:0 30px 80px rgba(0,0,0,.45);
}
.auth-card.wide{width:min(760px,100%)}
.auth-card h1{margin:0;font-size:30px;font-weight:600;line-height:1.25;letter-spacing:-.04em}
.auth-sub{margin:8px 0 0;font-size:13px;color:var(--gray);line-height:1.8}
.auth-sub a{color:var(--blue)}
.auth-form{margin-top:26px;display:flex;flex-direction:column;gap:15px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:12px;color:var(--gray)}
.field input{
  width:100%;height:46px;background:var(--panel);border:1px solid var(--line);
  border-radius:10px;color:var(--paper);padding:0 13px;font-family:var(--sans);
  font-size:14px;outline:none;transition:border-color .2s;
}
.field input:focus{border-color:var(--blue)}
.field input::placeholder{color:var(--gray-dark)}
.strength{display:flex;flex-direction:column;gap:6px;margin-top:1px}
.strength-bar{width:100%;height:4px;background:#2a2a2e;border-radius:999px;overflow:hidden}
.strength-bar i{display:block;height:100%;width:0;background:#ff6b6b;border-radius:999px;transition:width .2s,background .2s}
.strength-text{font-size:12px;line-height:1.55;color:var(--gray-dark)}
.auth-btn{
  width:100%;height:46px;border:0;border-radius:999px;background:var(--blue);
  color:#fff;font-family:var(--sans);font-size:14px;font-weight:500;
  cursor:pointer;transition:background .2s,transform .2s;
}
.auth-btn:hover{background:var(--blue-press)}
.auth-btn:active{transform:scale(.99)}
.auth-btn[disabled]{opacity:.55;cursor:default}
.auth-btn.small{width:auto;height:38px;padding:0 18px;font-size:13px}
.auth-dialog{
  position:fixed;inset:0;width:100%;height:100vh;height:100dvh;max-width:none;max-height:none;
  margin:0;padding:40px 24px;border:0;border-radius:0;
  background:#000;color:var(--paper);
  display:none;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;overflow:auto;
}
.auth-dialog[open]{display:flex}
.auth-dialog::backdrop{background:rgba(0,0,0,.55);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.auth-dialog h2{margin:0;font-size:clamp(40px,6vw,64px);font-weight:600;line-height:1.15;letter-spacing:-.05em}
.auth-dialog h2 .blue{color:var(--blue)}
.auth-dialog p{margin:20px auto 0;max-width:34em;font-size:15px;line-height:1.85;color:var(--gray)}
.auth-dialog .auth-msg{min-height:20px;margin-top:14px;font-size:13px}
.dialog-actions{display:flex;justify-content:center;gap:14px;margin-top:34px;flex-wrap:wrap}
.dialog-actions .ghost-btn,.dialog-actions .auth-btn.small{height:44px;padding:0 24px;font-size:14px}
.auth-msg{min-height:20px;margin:0;font-size:13px;line-height:1.7;color:var(--gray)}
.auth-msg.error{color:var(--danger)}
.auth-msg.success{color:var(--success)}
.auth-links{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-top:4px;font-size:12.5px;color:var(--gray)}
.auth-links a{color:var(--gray)}
.auth-links a:hover{color:var(--blue)}
.auth-note{margin:18px 0 0;font-size:12px;line-height:1.75;color:var(--gray-dark)}
.auth-section{margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}
.auth-section h2{margin:0 0 14px;font-size:16px;font-weight:500;line-height:1.5}

.account-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-wrap:wrap}
.account-name{margin:0;font-size:30px;font-weight:600;letter-spacing:-.04em}
.account-email{margin:6px 0 0;font-size:13px;color:var(--gray)}
.account-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.ghost-btn{
  display:inline-flex;align-items:center;justify-content:center;height:38px;
  padding:0 16px;border:1px solid var(--line);border-radius:999px;
  background:none;color:var(--paper);font-family:var(--sans);font-size:13px;
  cursor:pointer;transition:border-color .2s,color .2s;
}
.ghost-btn:hover{border-color:var(--blue);color:var(--blue)}
.account-section{margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}
.account-section h2{margin:0 0 12px;font-size:16px;font-weight:500}
.account-section p{margin:0;font-size:13.5px;line-height:1.85;color:var(--gray)}
.account-list{display:flex;flex-direction:column;gap:0;margin:0;padding:0;list-style:none}
.account-list li{padding:11px 0;border-bottom:1px solid var(--line-soft);font-size:13.5px;color:#c9c9ce}
.account-list li:last-child{border-bottom:0}
.account-list a{color:var(--blue)}

@media (max-width:520px){
  .auth-nav{padding:0 20px}
  .auth-shell{padding:82px 18px 40px}
  .auth-card{padding:28px 22px 24px;border-radius:14px}
  .auth-card h1{font-size:26px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}