:root {
  --bg: #eef3f6;
  --card: #ffffff;
  --text: #1b3440;
  --muted: #54717e;
  --line: #c7d6dd;
  --action: #0a7282;
  --action-hover: #065662;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Segoe UI, Arial, sans-serif;
  background: linear-gradient(160deg, #dceaf0, var(--bg));
  color: var(--text);
}

.container {
  width: min(900px, 94vw);
  margin: 2rem auto;
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  display: grid;
  gap: 0.7rem;
}

label { display: grid; gap: 0.3rem; }

input, button { font: inherit; }

input {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem;
}

button {
  border: 0;
  border-radius: 8px;
  background: var(--action);
  color: #fff;
  padding: 0.55rem 0.8rem;
  cursor: pointer;
}

button:hover:enabled { background: var(--action-hover); }
button:disabled { opacity: .6; cursor: not-allowed; }

video {
  width: 100%;
  min-height: 220px;
  background: #0f1f26;
  border-radius: 10px;
}

.muted { color: var(--muted); margin: 0; }

.row { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem; }

.messages {
  min-height: 120px;
  max-height: 240px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.5rem;
  background: #f9fcfd;
}

.msg { margin: 0 0 0.4rem; }
.msg small { color: var(--muted); margin-left: 0.3rem; }