* { box-sizing: border-box; }
body {
  width: 360px;
  margin: 0;
  font-family: system-ui, sans-serif;
  font-size: 13px;
  color: #222;
}
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: #006699;
  color: #fff;
}
.top h1 { margin: 0; font-size: 16px; }
.master { display: flex; align-items: center; gap: 6px; }
.switch { position: relative; display: inline-block; width: 40px; height: 22px; }
.switch input { display: none; }
.slider {
  position: absolute; cursor: pointer; inset: 0;
  background: #ccc; border-radius: 22px; transition: 0.2s;
}
.slider::before {
  content: ""; position: absolute; height: 18px; width: 18px;
  left: 2px; top: 2px; background: #fff; border-radius: 50%; transition: 0.2s;
}
.switch input:checked + .slider { background: #4caf50; }
.switch input:checked + .slider::before { transform: translateX(18px); }
.tabs { display: flex; border-bottom: 1px solid #ddd; }
.tabs button {
  flex: 1; padding: 8px; border: none; background: #f5f5f5; cursor: pointer;
}
.tabs button.active { background: #fff; font-weight: bold; border-bottom: 2px solid #006699; }
.tab { padding: 12px; }
.tab h2 { margin: 0 0 8px; font-size: 14px; }
.tab h3 { margin: 12px 0 6px; font-size: 12px; color: #555; }
.profile-list { list-style: none; margin: 0 0 8px; padding: 0; }
.profile-list li {
  display: flex; align-items: center; gap: 6px;
  padding: 6px; border: 1px solid #ddd; border-radius: 4px; margin-bottom: 6px;
}
.profile-list .name { flex: 1; }
.profile-list .user { color: #777; font-size: 11px; }
.btn {
  padding: 6px 10px; border: 1px solid #ccc; border-radius: 4px;
  background: #fff; cursor: pointer;
}
.btn.primary { background: #006699; color: #fff; border-color: #006699; }
.btn-row { display: flex; gap: 6px; margin-top: 6px; }
.form input {
  width: 100%; padding: 6px; margin-bottom: 6px;
  border: 1px solid #ccc; border-radius: 4px;
}
.form .row { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.course-row {
  border: 1px solid #ddd; border-radius: 4px; padding: 6px; margin-bottom: 6px;
}
.course-row .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.course-row input { margin-bottom: 4px; }
.status { margin-top: 8px; font-size: 12px; }
.status.error { color: #c00; }
.status.ok { color: #080; }