/* ── Design Tokens ── */
:root {
  --bg:           #0a0a0f;
  --surface:      #12121a;
  --surface-hi:   #1a1a26;
  --border:       #2a2a3a;
  --accent:       #00d4aa;
  --warn:         #f5a623;
  --danger:       #e53e3e;
  --muted:        #4a4a6a;
  --text:         #e8e8f0;
  --text-sec:     #8888aa;
  --text-data:    #00d4aa;
  --font-mono:    'JetBrains Mono', monospace;
  --font-body:    'Inter', sans-serif;
  --radius:       6px;
  --gap:          16px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ── */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 24px;
  height: 52px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-left { display: flex; align-items: baseline; gap: 12px; }
.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  letter-spacing: 0.12em;
}
.logo-sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-sec);
  letter-spacing: 0.08em;
}
.header-center { text-align: center; }
.clock {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-sec);
  letter-spacing: 0.05em;
}
.header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}
.version {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  transition: background 0.3s;
}
.status-dot.live    { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.status-dot.dead    { background: var(--danger);  box-shadow: 0 0 6px var(--danger); }
.status-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-sec);
  letter-spacing: 0.1em;
}

/* ── Summary Strip ── */
.summary-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
}
.summary-card {
  background: var(--surface);
  padding: 14px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.summary-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-sec);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.summary-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}
.summary-value.accent { color: var(--accent); }
.summary-value.muted  { color: var(--text-sec); font-size: 0.95rem; }

/* ── Agent Grid ── */
.agent-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
  padding: var(--gap) 20px;
  flex: 1;
}
.agent-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  transition: border-color 0.2s, background 0.2s;
  cursor: default;
}
.agent-card:hover {
  border-color: var(--accent);
  background: var(--surface-hi);
}
.agent-card.status-healthy  { border-left: 3px solid var(--accent); }
.agent-card.status-degraded { border-left: 3px solid var(--warn); }
.agent-card.status-down     { border-left: 3px solid var(--danger); }
.agent-card.status-offline  { border-left: 3px solid var(--muted); }

.agent-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 8px;
}
.agent-name {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.3;
}
.agent-id {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 2px;
}
.status-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 2px 7px;
  border-radius: 3px;
  white-space: nowrap;
  flex-shrink: 0;
}
.badge-healthy  { background: rgba(0,212,170,0.12); color: var(--accent); }
.badge-degraded { background: rgba(245,166,35,0.15); color: var(--warn); }
.badge-down     { background: rgba(229,62,62,0.15);  color: var(--danger); }
.badge-offline  { background: rgba(74,74,106,0.25);  color: var(--muted); }

.agent-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 10px;
}
.metric { display: flex; flex-direction: column; gap: 2px; }
.metric-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-sec);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.metric-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-data);
}
.metric-value.dim { color: var(--text-sec); font-size: 0.82rem; }

.agent-action {
  font-size: 0.75rem;
  color: var(--text-sec);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 6px;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}
.agent-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--muted);
}
.kraken-val { color: var(--warn); }

/* ── Activity Feed ── */
.activity-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  margin: 0 20px 20px;
  border-radius: var(--radius);
  overflow: hidden;
}
.activity-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-hi);
}
.section-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-sec);
  letter-spacing: 0.12em;
}
.activity-count {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
}
.activity-feed {
  height: 400px;
  overflow-y: auto;
  padding: 4px 0;
}
.activity-feed::-webkit-scrollbar { width: 4px; }
.activity-feed::-webkit-scrollbar-track { background: var(--surface); }
.activity-feed::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.activity-empty {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  padding: 20px 14px;
  text-align: center;
}
.activity-row {
  display: grid;
  grid-template-columns: 140px 80px 80px 1fr;
  gap: 8px;
  align-items: center;
  padding: 5px 14px;
  border-bottom: 1px solid rgba(42,42,58,0.5);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  transition: background 0.15s;
}
.activity-row:hover { background: var(--surface-hi); }
.activity-ts    { color: var(--muted); }
.activity-agent { color: var(--accent); }
.activity-status-healthy  { color: var(--accent); }
.activity-status-degraded { color: var(--warn); }
.activity-status-down     { color: var(--danger); }
.activity-status-offline  { color: var(--muted); }
.activity-action {
  color: var(--text-sec);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Footer ── */
.footer {
  font-size: 0.68rem;
  color: var(--muted);
  font-family: var(--font-mono);
  text-align: center;
  padding: 12px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

/* ── Stale indicator ── */
.stale-banner {
  background: rgba(229,62,62,0.12);
  border: 1px solid rgba(229,62,62,0.3);
  color: var(--danger);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-align: center;
  padding: 6px;
  letter-spacing: 0.08em;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .agent-grid { grid-template-columns: 1fr; }
  .summary-strip { grid-template-columns: repeat(2, 1fr); }
  .header { grid-template-columns: 1fr 1fr; }
  .header-center { display: none; }
  .activity-row { grid-template-columns: 110px 70px 1fr; }
  .activity-row .activity-status-healthy,
  .activity-row .activity-status-degraded,
  .activity-row .activity-status-down,
  .activity-row .activity-status-offline { display: none; }
}
@media (max-width: 480px) {
  .summary-strip { grid-template-columns: 1fr; }
  .header-right .version { display: none; }
}