:root{
  --bg0:#0b1020;
  --bg1:#0f172a;
  --card:#0b1224cc;
  --stroke:#24324f;
  --text:#e5e7eb;
  --muted:#94a3b8;
  --brand:#7c3aed;
  --brand2:#22c55e;
  --danger:#ef4444;
  --shadow: 0 22px 60px rgba(0,0,0,.45);
  --radius: 18px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  color:var(--text);
  background:
    radial-gradient(1000px 600px at 20% 0%, rgba(124,58,237,.25), transparent 60%),
    radial-gradient(900px 700px at 90% 20%, rgba(34,197,94,.16), transparent 55%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}

.page{
  min-height:100%;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:18px;
  padding:32px 16px;
}

.card{
  width:min(440px, 100%);
  padding:22px 22px 18px;
  border-radius:var(--radius);
  background: linear-gradient(180deg, rgba(11,18,36,.75), rgba(11,18,36,.55));
  border:1px solid rgba(36,50,79,.8);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.card__header{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:14px;
}
.brand{
  width:44px;height:44px;
  border-radius:14px;
  display:grid;place-items:center;
  background: radial-gradient(26px 26px at 30% 30%, rgba(255,255,255,.25), transparent 60%),
    linear-gradient(135deg, rgba(124,58,237,.95), rgba(34,197,94,.8));
  font-weight:800;
  letter-spacing:.5px;
}
.title{margin:0;font-size:22px;line-height:1.1}
.subtitle{margin:6px 0 0;color:var(--muted);font-size:13px}

.form{display:flex;flex-direction:column;gap:14px}
.field{display:flex;flex-direction:column;gap:7px}
.label{font-size:13px;color:#dbeafe}
.control{display:flex;gap:10px}
.control--withButton{align-items:center}

.input{
  width:100%;
  padding:12px 12px;
  border-radius:12px;
  border:1px solid rgba(36,50,79,.9);
  background: rgba(2,6,23,.55);
  color:var(--text);
  outline:none;
  transition: border-color .15s ease, box-shadow .15s ease, transform .05s ease;
}
.input::placeholder{color:rgba(148,163,184,.7)}
.input:focus{
  border-color: rgba(124,58,237,.9);
  box-shadow: 0 0 0 4px rgba(124,58,237,.18);
}
.input[aria-invalid="true"]{
  border-color: rgba(239,68,68,.85);
  box-shadow: 0 0 0 4px rgba(239,68,68,.15);
}

.iconBtn{
  flex:0 0 auto;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid rgba(36,50,79,.9);
  background: rgba(2,6,23,.45);
  color:var(--text);
  cursor:pointer;
  transition: transform .05s ease, border-color .15s ease, background .15s ease;
}
.iconBtn--square{
  width:44px;
  height:44px;
  padding:0;
  display:grid;
  place-items:center;
}
.iconBtn:hover{border-color: rgba(148,163,184,.55)}
.iconBtn:active{transform: translateY(1px)}

.sr-only{
  position:absolute !important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

.icon{width:20px;height:20px;display:block}
.icon--provider{width:22px;height:22px}
.iconBtn .icon--eyeOff{display:none}
.iconBtn[aria-pressed="true"] .icon--eye{display:none}
.iconBtn[aria-pressed="true"] .icon--eyeOff{display:block}

.row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.row--space{margin-top:2px}
.checkbox{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;user-select:none}
.checkbox input{accent-color: var(--brand)}
.meta{color:rgba(148,163,184,.7);font-size:12px}

.help{margin:0;min-height:16px;color: rgba(239,68,68,.95);font-size:12px}

.btn{
  position:relative;
  width:100%;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid rgba(124,58,237,.65);
  background: linear-gradient(135deg, rgba(124,58,237,.95), rgba(34,197,94,.75));
  color:white;
  font-weight:700;
  letter-spacing:.2px;
  cursor:pointer;
  box-shadow: 0 14px 34px rgba(124,58,237,.18);
  transition: transform .06s ease, filter .15s ease, opacity .15s ease;
}
.btn:hover{filter: brightness(1.05)}
.btn:active{transform: translateY(1px)}
.btn:disabled{opacity:.65;cursor:not-allowed}

.btn--secondary{
  border-color: rgba(36,50,79,.9);
  background: rgba(2,6,23,.35);
  box-shadow: none;
  color: var(--text);
}
.btn--secondary:hover{filter:none;border-color: rgba(148,163,184,.55)}

.btn__text{display:inline-block}
.spinner{
  display:none;
  position:absolute;
  right:14px; top:50%;
  width:16px;height:16px;
  margin-top:-8px;
  border-radius:999px;
  border:2px solid rgba(255,255,255,.35);
  border-top-color: rgba(255,255,255,.95);
  animation: spin .85s linear infinite;
}
.btn[data-loading="true"] .spinner{display:block}
.btn[data-loading="true"] .btn__text{opacity:.92}

@keyframes spin{to{transform: rotate(360deg)}}

.divider{
  margin:2px 0 0;
  display:flex;
  align-items:center;
  gap:12px;
  color: rgba(148,163,184,.75);
  font-size:12px;
}
.divider::before,.divider::after{
  content:"";
  height:1px;
  flex:1;
  background: rgba(36,50,79,.85);
}
.divider span{white-space:nowrap}

.oauth{display:flex;gap:10px}
.oauth .btn{width:100%}
.oauth .btn{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
}
.icon--wechat{color:#22c55e}
.icon--github{color:#e5e7eb}

.link{
  color: rgba(219,234,254,.9);
  text-decoration:none;
  font-size:13px;
}
.link:hover{text-decoration:underline}

.footnote{
  margin:6px 0 0;
  color: rgba(148,163,184,.85);
  font-size:13px;
  text-align:center;
}

.footer{
  color: rgba(148,163,184,.65);
  font-size:12px;
}

.toast{
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(.98);
  background: rgba(2,6,23,.78);
  border: 1px solid rgba(36,50,79,.9);
  box-shadow: 0 18px 46px rgba(0,0,0,.45);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  max-width: min(520px, calc(100vw - 24px));
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}
.toast[data-show="true"]{
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.toast--ok{border-color: rgba(34,197,94,.6)}
.toast--warn{border-color: rgba(239,68,68,.6)}

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