/* css/app.css — Lixio Cloud 綁定頁樣式 */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
  background: #1a202c;  /* 品牌深色 */
  color: #e2e8f0;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}
.screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
.logo { font-size: 28px; font-weight: 700; letter-spacing: 1px; }
.sub { color: #94a3b8; font-size: 14px; margin: 6px 0 24px; }
.muted { color: #64748b; font-size: 12px; margin-top: 12px; text-align: center; }
.card {
  width: 100%;
  max-width: 340px;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card label { font-size: 13px; color: #94a3b8; margin-top: 8px; }
.card input {
  padding: 11px 12px;
  border-radius: 8px;
  border: 1px solid #334155;
  background: #1e293b;
  color: #e2e8f0;
  font-size: 15px;
}
.card input:focus { outline: none; border-color: #3b82f6; }
.card button {
  margin-top: 18px;
  padding: 12px;
  border-radius: 8px;
  border: none;
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}
.card button:disabled { opacity: 0.6; }
.error { color: #fca5a5; font-size: 13px; margin-top: 10px; }
.spinner {
  width: 32px; height: 32px;
  border: 3px solid #334155;
  border-top-color: #06b6d4;
  border-radius: 50%;
  margin: 20px 0;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }