:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-input: #252830;
  --bg-hover: #2a2d38;
  --border: #2e3140;
  --text: #e1e4eb;
  --text-dim: #8b8fa3;
  --text-muted: #5c6078;
  --accent: #6c8cff;
  --accent-dim: #4a6ae0;
  --green: #4ade80;
  --red: #f87171;
  --orange: #fb923c;
  --yellow: #fbbf24;
  --cyan: #22d3ee;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  --radius: 8px;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
  height: 100vh;
}

#app {
  display: flex;
  height: 100vh;
}

/* Sidebar */
#sidebar {
  width: 200px;
  min-width: 200px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 0;
}

.logo {
  padding: 20px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}

.logo-icon { font-size: 20px; color: var(--accent); }
.logo-text { font-size: 18px; font-weight: 700; letter-spacing: 1px; color: var(--text); }

.nav-links {
  list-style: none;
  padding: 12px 8px;
  flex: 1;
}

.nav-links li { margin-bottom: 2px; }

.nav-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  transition: all 0.15s;
}

.nav-links a:hover { background: var(--bg-hover); color: var(--text); }
.nav-links a.active { background: var(--accent-dim); color: #fff; }
.nav-icon { font-size: 14px; width: 18px; text-align: center; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.watch-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
}

.watch-indicator .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.watch-indicator.running .dot { background: var(--green); box-shadow: 0 0 6px var(--green); }
.watch-indicator.stopped .dot { background: var(--red); }

/* Main content */
#content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.page { display: none; }
.page.active { display: block; }

/* Page header */
.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 4px;
}

.page-header p {
  color: var(--text-dim);
  font-size: 13px;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.tab {
  padding: 10px 20px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font);
}

.tab:hover { color: var(--text); background: var(--bg-hover); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-panel { display: block; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  font-family: var(--mono);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-dim);
}

.stat-value.green { color: var(--green); }
.stat-value.red { color: var(--red); }
.stat-value.orange { color: var(--orange); }
.stat-value.cyan { color: var(--cyan); }

/* Table */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th {
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tr:hover td { background: var(--bg-hover); }

.mono { font-family: var(--mono); font-size: 12px; }
.text-dim { color: var(--text-dim); }
.text-red { color: var(--red); }
.text-green { color: var(--green); }
.text-orange { color: var(--orange); }
.text-cyan { color: var(--cyan); }
.text-right { text-align: right; }

/* Status badge */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--mono);
}

.badge-2xx { background: rgba(74, 222, 128, 0.15); color: var(--green); }
.badge-3xx { background: rgba(108, 140, 255, 0.15); color: var(--accent); }
.badge-4xx { background: rgba(251, 191, 36, 0.15); color: var(--yellow); }
.badge-5xx { background: rgba(248, 113, 113, 0.15); color: var(--red); }

/* Forms */
.form-row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

input, select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  color: var(--text);
  font-size: 13px;
  font-family: var(--mono);
  outline: none;
  transition: border-color 0.15s;
}

input:focus, select:focus { border-color: var(--accent); }
input::placeholder { color: var(--text-muted); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font);
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dim); }
.btn-danger { background: var(--red); color: #fff; }
.btn-danger:hover { opacity: 0.85; }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text-dim); }
.btn-ghost:hover { background: var(--bg-hover); color: var(--text); }

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--text-dim);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 10px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Empty state */
.empty {
  text-align: center;
  padding: 40px;
  color: var(--text-dim);
}

/* Trace detail */
.trace-header {
  display: flex;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.trace-stat {
  display: flex;
  flex-direction: column;
}

.trace-stat-value {
  font-size: 24px;
  font-weight: 700;
  font-family: var(--mono);
}

.trace-stat-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* Alert item */
.alert-item {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.alert-info { flex: 1; }
.alert-app { font-weight: 600; color: var(--orange); }
.alert-path { font-family: var(--mono); font-size: 12px; color: var(--text-dim); margin-left: 12px; }
.alert-time { font-family: var(--mono); font-size: 12px; color: var(--text-muted); }

/* App name link */
.app-link {
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
}
.app-link:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 768px) {
  #sidebar { width: 56px; min-width: 56px; }
  .logo-text, .nav-links a span:not(.nav-icon), .sidebar-footer { display: none; }
  .nav-links a { justify-content: center; padding: 12px; }
  .nav-icon { width: auto; font-size: 18px; }
  #content { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Log path truncation */
.path-cell {
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Clickable row */
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: rgba(108, 140, 255, 0.08); }

/* Source badges */
.src-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--mono);
  letter-spacing: 0.3px;
}
.src-haproxy { background: rgba(251, 146, 60, 0.15); color: var(--orange); }
.src-nginx   { background: rgba(74, 222, 128, 0.15); color: var(--green); }
.src-h2o     { background: rgba(108, 140, 255, 0.15); color: var(--accent); }
.src-span    { background: rgba(34, 211, 238, 0.15); color: var(--cyan); }

/* Result info bar */
.result-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--text-dim);
}
.result-info strong { color: var(--text); font-weight: 600; }

/* Trace flow visualization */
.trace-flow {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 20px;
  padding: 16px 20px;
  background: var(--bg-input);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow-x: auto;
}
.trace-flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 90px;
  position: relative;
}
.trace-flow-box {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--mono);
  border: 1px solid var(--border);
  text-align: center;
  min-width: 80px;
}
.trace-flow-box.haproxy { background: rgba(251, 146, 60, 0.12); border-color: rgba(251, 146, 60, 0.3); color: var(--orange); }
.trace-flow-box.nginx   { background: rgba(74, 222, 128, 0.12); border-color: rgba(74, 222, 128, 0.3); color: var(--green); }
.trace-flow-box.h2o     { background: rgba(108, 140, 255, 0.12); border-color: rgba(108, 140, 255, 0.3); color: var(--accent); }
.trace-flow-box.span    { background: rgba(34, 211, 238, 0.12); border-color: rgba(34, 211, 238, 0.3); color: var(--cyan); }
.trace-flow-time {
  font-size: 10px;
  font-family: var(--mono);
  color: var(--text-muted);
}
.trace-flow-status {
  font-size: 10px;
  font-family: var(--mono);
}
.trace-flow-arrow {
  display: flex;
  align-items: center;
  padding: 0 8px;
  color: var(--text-muted);
  font-size: 16px;
  flex-shrink: 0;
}
.trace-flow-arrow .ms {
  font-size: 10px;
  color: var(--text-dim);
  margin: 0 4px;
}