body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f6f7fb;
  color: #111;
}
.container {
  max-width: 760px;
  margin: 48px auto;
  background: #fff;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
}
h1 {
  font-size: 20px;
  margin-bottom: 16px;
}
.inputs {
  display: flex;
  gap: 12px;
}
.field {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.field label {
  font-size: 13px;
  color: #666;
  margin-bottom: 4px;
}
.field input {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 14px;
  width: 100%;
  box-sizing: border-box;
}
.field input:focus {
  outline: none;
  border-color: #00a1d6;
  box-shadow: 0 0 0 2px rgba(0,161,214,.15);
}
button {
  padding: 10px 20px;
  cursor: pointer;
  border: 1px solid #ccc;
  border-radius: 6px;
  background: #fff;
  font-size: 14px;
  white-space: nowrap;
}
button:hover {
  background: #f0f0f0;
}
#btn {
  margin-top: 14px;
  background: #00a1d6;
  color: #fff;
  border-color: #00a1d6;
  font-size: 15px;
  padding: 10px 32px;
}
#btn:hover {
  background: #0090c0;
}
#btn:disabled {
  opacity: .6;
  cursor: default;
}
.err {
  color: #c00;
  margin-top: 12px;
  min-height: 18px;
  font-size: 14px;
}
.result {
  margin-top: 16px;
}
.titleBar {
  font-size: 15px;
  color: #333;
  margin-bottom: 10px;
  line-height: 1.6;
  display: none;
}
.titleBar .room-title {
  font-weight: bold;
  font-size: 16px;
}
.titleBar .anchor-name {
  color: #666;
  margin-left: 8px;
}
.cover {
  max-width: 480px;
  max-height: 320px;
  display: none;
  border-radius: 10px;
  margin-bottom: 12px;
}
.urlRow {
  display: flex;
  gap: 8px;
  align-items: center;
}
.urlRow input {
  flex: 1;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 13px;
  box-sizing: border-box;
}
.download {
  margin-top: 10px;
}
.footer {
  margin-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #999;
}
.footer a {
  color: #00a1d6;
  text-decoration: none;
}
.footer a:hover {
  text-decoration: underline;
}