* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft Yahei", sans-serif;
  background: #0f1115;
  color: #e6e6e6;
}
a { color: #6cc8ff; text-decoration: none; }
button, .btn {
  background: #2b6fe0;
  color: #fff;
  border: 0;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
button:hover, .btn:hover { background: #3b7ff0; }
button.danger { background: #d14343; }
button.danger:hover { background: #e05252; }
button.ghost { background: #2a2f3a; }
button:disabled { background: #555; cursor: not-allowed; }
input, select {
  background: #1c1f27;
  border: 1px solid #2a2f3a;
  color: #e6e6e6;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 14px;
}
input:focus, select:focus { outline: none; border-color: #2b6fe0; }
.card {
  background: #1a1d24;
  border: 1px solid #262b35;
  border-radius: 10px;
  padding: 18px;
}
.topbar {
  padding: 12px 20px;
  background: #151820;
  border-bottom: 1px solid #262b35;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar h1 { font-size: 18px; margin: 0; font-weight: 600; }
.container { max-width: 1200px; margin: 0 auto; padding: 20px; }
.row { display: flex; gap: 16px; }
.row > * { flex: 1; }
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box { width: 380px; padding: 32px; }
.login-box h2 { margin-top: 0; text-align: center; }
.login-box input { width: 100%; margin-bottom: 12px; }
.login-box button { width: 100%; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #262b35; font-size: 13px; }
th { color: #9aa0a6; font-weight: 500; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; }
.tag.online { background: #1f4d2b; color: #7be08a; }
.tag.offline { background: #4d1f1f; color: #e08383; }
.tag.busy { background: #4d3f1f; color: #e0c97b; }
.tag.idle { background: #1f334d; color: #7bb2e0; }
.tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid #262b35; }
.tabs .tab { padding: 10px 16px; cursor: pointer; color: #9aa0a6; border-bottom: 2px solid transparent; }
.tabs .tab.active { color: #fff; border-bottom-color: #2b6fe0; }
.err { color: #e08383; font-size: 13px; margin-top: 8px; min-height: 18px; }
.info-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.info-grid .item { background: #1a1d24; border: 1px solid #262b35; border-radius: 8px; padding: 12px; }
.info-grid .label { font-size: 12px; color: #9aa0a6; }
.info-grid .value { font-size: 20px; font-weight: 600; margin-top: 4px; }
.session-view { display: grid; grid-template-columns: 1fr 300px; gap: 16px; height: calc(100vh - 200px); }
.session-view iframe { width: 100%; height: 100%; border: 1px solid #262b35; border-radius: 8px; background: #fff; }
.side-panel { display: flex; flex-direction: column; gap: 12px; }
.side-panel .card { padding: 14px; }
.side-panel h3 { margin: 0 0 10px 0; font-size: 14px; color: #9aa0a6; }
.form-row { display: flex; gap: 8px; }
.form-row input { flex: 1; }
.muted { color: #9aa0a6; font-size: 12px; }
.mono { font-family: Consolas, Menlo, monospace; }
.machine-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.machine-card { border: 1px solid #262b35; border-radius: 8px; padding: 14px; background: #1a1d24; }
.machine-card h4 { margin: 0 0 8px 0; font-size: 15px; }
.machine-card .meta { font-size: 12px; color: #9aa0a6; margin-bottom: 10px; }