:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-hover: #22252f;
  --border: #2a2d3a;
  --text: #e4e4e7;
  --text-muted: #8b8d98;
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.1);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --info: #3b82f6;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Login */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 48px 40px;
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.login-icon { font-size: 48px; margin-bottom: 16px; }
.login-card h1 { font-size: 28px; font-weight: 700; margin-bottom: 4px; }
.subtitle { color: var(--text-muted); margin-bottom: 32px; font-size: 14px; }

.login-card input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
  margin-bottom: 16px;
}

.login-card input:focus { border-color: var(--primary); }

.login-card button {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.login-card button:hover { background: var(--primary-hover); }

.error { color: var(--danger); font-size: 13px; margin-top: 12px; min-height: 20px; }

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-left { display: flex; align-items: center; gap: 12px; }
header h1 { font-size: 22px; font-weight: 700; }
.header-subtitle { color: var(--text-muted); font-size: 14px; }

/* Main */
main { max-width: 1200px; margin: 0 auto; padding: 24px 32px; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-header h2 { font-size: 16px; font-weight: 600; }

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}
.badge::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.badge-running { background: var(--success-bg); color: var(--success); }
.badge-running::before { background: var(--success); }
.badge-stopped { background: var(--danger-bg); color: var(--danger); }
.badge-stopped::before { background: var(--danger); }
.badge-transitioning { background: var(--warning-bg); color: var(--warning); }
.badge-transitioning::before { background: var(--warning); animation: pulse 1.5s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* Info Grid */
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.info-item label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.info-item span { font-size: 15px; font-weight: 500; }

/* Controls */
.controls {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  background: var(--surface);
  color: var(--text);
  transition: all 0.2s;
}
.btn:hover { background: var(--surface-hover); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn:disabled:hover { background: var(--surface); }

.btn-success { border-color: var(--success); color: var(--success); }
.btn-success:hover:not(:disabled) { background: var(--success-bg); }
.btn-danger { border-color: var(--danger); color: var(--danger); }
.btn-danger:hover:not(:disabled) { background: var(--danger-bg); }
.btn-warning { border-color: var(--warning); color: var(--warning); }
.btn-warning:hover:not(:disabled) { background: var(--warning-bg); }
.btn-primary { border-color: var(--primary); color: var(--primary); }
.btn-primary:hover:not(:disabled) { background: rgba(99, 102, 241, 0.1); }
.btn-ghost { border: none; color: var(--text-muted); }
.btn-ghost:hover { color: var(--text); }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.btn.loading { position: relative; color: transparent; }
.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--text-muted);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card { padding: 20px; margin-bottom: 0; }

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.metric-header h3 { font-size: 13px; color: var(--text-muted); font-weight: 500; }
.metric-value { font-size: 24px; font-weight: 700; }

.sparkline { height: 48px; }
.sparkline svg { width: 100%; height: 100%; }

/* Terminal */
.terminal-section { margin-bottom: 24px; }
.terminal-section .card-header { margin-bottom: 12px; }
#terminal {
  background: #000;
  border-radius: 8px;
  padding: 4px;
  height: 400px;
  overflow: hidden;
}

/* Footer */
footer {
  display: flex;
  justify-content: space-between;
  padding: 16px 32px;
  color: var(--text-muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}

/* Responsive */
@media (max-width: 768px) {
  .info-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  main { padding: 16px; }
  header { padding: 12px 16px; }
}

@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .controls { flex-direction: column; }
  .btn { justify-content: center; }
}