:root {
  --bg: #0f1115;
  --panel: #171a21;
  --text: #e6e8eb;
  --muted: #9aa3ad;
  --accent: #4f8cff;
  --error: #ff6b6b;
  --border: #262b34;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.topbar {
  display: flex;
  align-items: center;
  padding: 0.75rem 1.25rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 600; letter-spacing: 0.02em; }
.content { max-width: 960px; margin: 0 auto; padding: 1.5rem 1.25rem; }
.login { max-width: 320px; margin: 3rem auto; }
.login-form { display: flex; flex-direction: column; gap: 0.5rem; }
.login-form input {
  padding: 0.5rem 0.6rem;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.login-form button, #logout-btn {
  margin-top: 0.75rem;
  padding: 0.55rem 0.75rem;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}
.error { color: var(--error); margin: 0.5rem 0 0; }
.dashboard-head { display: flex; justify-content: space-between; align-items: center; }
.machines { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.machines th, .machines td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
}
.machines th { color: var(--muted); font-weight: 500; }
/* Status badges, threshold flags, charts (Phase 3) */
.muted { color: var(--muted); }
.badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.badge-online { background: #14532d; color: #bbf7d0; }
.badge-offline { background: #7f1d1d; color: #fecaca; }
.flag {
  display: inline-block;
  margin-right: 0.25rem;
  padding: 0.05rem 0.4rem;
  border-radius: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
}
.flag-cpu { background: #b45309; }
.flag-mem { background: #6d28d9; }
.flag-disk { background: #b91c1c; }
.stat { display: inline-block; margin-right: 0.75rem; font-size: 0.9rem; }
.chart { margin-bottom: 1.5rem; max-width: 100%; }
.meta { margin: 0.5rem 0; display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.flags { margin: 0.5rem 0 1rem; }
.back { color: var(--accent); text-decoration: none; }
.settings-form { display: flex; flex-direction: column; gap: 0.4rem; max-width: 360px; }
.settings-form input {
  padding: 0.4rem 0.5rem;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.danger { margin-top: 2rem; }
.danger button {
  background: #7f1d1d;
  color: #fecaca;
  border: 0;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
}

/* Add-agent onboarding */
#add-agent-btn {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
}
.add-agent-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}
.add-agent-panel h2 { margin-top: 0; }
.install-box { position: relative; margin: 0.75rem 0; }
.install-box pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
}
.add-agent-actions { margin: 0.75rem 0; }
.dl-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  margin: 0 0.4rem;
}