#tc-dl-overlay {
  display: flex;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 99999;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
.tc-dl-box {
  position: relative;
  background: #fff;
  border-radius: 16px;
  padding: 40px 48px;
  text-align: center;
  max-width: 380px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.tc-dl-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: #1a73e8;
  color: #fff;
  font-size: 32px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.tc-dl-title {
  font-size: 20px; font-weight: 600;
  margin: 0 0 10px; color: #1a1a1a;
}
.tc-dl-sub {
  font-size: 14px; color: #666;
  margin: 0 0 8px;
}
.tc-dl-sub a { color: #1a73e8; }
.tc-dl-close {
  position: absolute; top: 14px; right: 16px;
  background: none; border: none;
  font-size: 18px; cursor: pointer; color: #999;
}
.tc-dl-close:hover { color: #333; }