* { box-sizing: border-box; }
body {
  margin: 0;
  background: #080b12;
  color: #f4f7fb;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.app {
  width: min(1100px, 94vw);
  margin: 0 auto;
  padding: 22px 0 40px;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}
h1 { margin: 0; font-size: clamp(26px, 5vw, 42px); }
.status {
  padding: 8px 12px;
  border: 1px solid #29344a;
  border-radius: 999px;
  color: #b9c6dc;
  font-size: 14px;
}
.videos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.video-card {
  position: relative;
  min-height: 280px;
  aspect-ratio: 16/10;
  background: #111827;
  border: 1px solid #27344c;
  border-radius: 16px;
  overflow: hidden;
}
video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: #111827;
}
.label {
  position: absolute;
  z-index: 2;
  top: 12px;
  left: 12px;
  padding: 6px 10px;
  border-radius: 8px;
  background: rgba(0,0,0,.65);
  font-weight: 700;
}
.placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #8290a8;
  pointer-events: none;
}
.controls {
  display: flex;
  gap: 10px;
  margin: 16px 0;
}
button {
  border: 0;
  border-radius: 10px;
  padding: 11px 18px;
  background: #356dff;
  color: white;
  font-weight: 700;
  cursor: pointer;
}
button:disabled {
  opacity: .4;
  cursor: not-allowed;
}
#stopBtn { background: #d83b4b; }
.chat {
  border: 1px solid #27344c;
  border-radius: 16px;
  padding: 14px;
  background: #0d1320;
}
.chat h2 { margin: 0 0 12px; }
.messages {
  height: 220px;
  overflow-y: auto;
  padding: 12px;
  border-radius: 12px;
  background: #070b12;
  border: 1px solid #202c40;
}
.message {
  width: fit-content;
  max-width: 85%;
  padding: 8px 11px;
  margin: 7px 0;
  border-radius: 10px;
  background: #182338;
  overflow-wrap: anywhere;
}
.message.me {
  margin-left: auto;
  background: #2454c6;
}
.system {
  text-align: center;
  color: #7787a1;
  font-size: 14px;
}
#chatForm {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
#chatInput {
  min-width: 0;
  flex: 1;
  border: 1px solid #2a3953;
  background: #090e17;
  color: white;
  border-radius: 10px;
  padding: 11px 12px;
  outline: none;
}
@media (max-width: 700px) {
  .videos { grid-template-columns: 1fr; }
  .video-card { min-height: 220px; }
  header { align-items: flex-start; flex-direction: column; }
}