body {
  font-family: Inter, system-ui, Arial, sans-serif;
  background: #f5f7fb;
  color: #111;
  margin: 0;
}

.container {
  max-width: 900px;
  margin: 24px auto;
  padding: 20px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 6px 24px rgba(19,22,31,.06);
}

h1 {
  margin-bottom: 12px;
}

.panel {
  margin: 16px 0;
  padding: 20px;
  border-radius: 8px;
  background: #fbfcff;
  border: 1px solid #eef2ff;
}

label {
  display: block;
  margin-top: 10px;
  font-weight: 600;
}

input[type="file"] {
  width: 100%;
  padding: 8px;
  margin-top: 6px;
  border-radius: 6px;
  border: 1px solid #dfe7ff;
}

button {
  margin-top: 16px;
  padding: 12px 18px;
  font-size: 16px;
  border: 0;
  border-radius: 8px;
  background: #2563eb;
  color: #fff;
  cursor: pointer;
  transition: background .2s;
}

button:hover:not([disabled]) {
  background: #1d4ed8;
}

button[disabled] {
  opacity: .6;
  cursor: not-allowed;
}

video {
  display: block;
  margin-top: 12px;
  max-width: 100%;
  border-radius: 6px;
  background: #000;
}

footer {
  margin-top: 20px;
  text-align: center;
  color: #666;
}