body { margin:0; font-family:Arial; }

.login-page {
  display:flex;
  justify-content:center;
  align-items:center;
  height:100vh;
}

.login-box { width:260px; }

input {
  width:100%;
  padding:8px;
  margin:6px 0;
}

button {
  padding:6px;
  margin-top:6px;
}

.captcha {
  display:flex;
  align-items:center;
}
.captcha span {
  margin-left:10px;
  font-weight:bold;
}

.top-bar {
  display:flex;
  justify-content:space-between;
  padding:10px;
  background:#f2f2f2;
}

.grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px;
  padding:10px;
}

.grid-item {
  border:1px solid #ccc;
  text-align:center;
  padding:10px;
  cursor:pointer;
}

.grid-item img {
  width:40px;
  height:40px;
}

iframe {
  width:100%;
  height:50vh;
  border:none;
}

.footer {
  position:fixed;
  bottom:0;
  width:100%;
  display:flex;
}

.footer button { flex:1; }

.mask {
  display:none;
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.6);
}

.dialog {
  background:#fff;
  width:260px;
  margin:40% auto;
  padding:15px;
}