:root {
  --bg: #070d18;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #2563eb;
  --ok: #22c55e;
  --bad: #ef4444;
  --border: #334155;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.bg-glow {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(37, 99, 235, 0.18), transparent),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(34, 197, 94, 0.08), transparent);
  pointer-events: none;
}

.panel {
  position: relative;
  width: 100%;
  max-width: 440px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}

.brand {
  text-align: center;
  margin-bottom: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 12px;
  border-radius: 14px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  font-weight: 700;
  font-size: 15px;
}

.brand h1 {
  margin: 0 0 6px;
  font-size: 22px;
}

.sub {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
}

label { color: var(--muted); font-size: 13px; }

input {
  width: 100%;
  background: #0b1220;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 10px;
}

.captcha-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}

.captcha-img {
  height: 44px;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: pointer;
  background: #0b1220;
}

.code-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.btn {
  background: #334155;
  color: var(--text);
  border: none;
  border-radius: 8px;
  padding: 9px 14px;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary { background: var(--primary); width: 100%; padding: 12px; font-size: 15px; margin-top: 8px; }
.btn.ghost { background: transparent; border: 1px solid var(--border); }

.status {
  min-height: 20px;
  margin: 8px 0;
  font-size: 13px;
  color: var(--muted);
}

.status.ok { color: var(--ok); }
.status.bad { color: var(--bad); }

.tip {
  margin-top: 16px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

.tip a { color: #60a5fa; }

.room-preview {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #0b1220;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.room-preview strong { color: var(--ok); }