/* Reset & base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-hover: #242836;
  --border: #2e3344;
  --text: #e1e4ed;
  --text-muted: #8b90a0;
  --accent: #6c7cff;
  --accent-hover: #8b98ff;
  --green: #4caf78;
  --red: #e05260;
  --orange: #e0943a;
  --yellow: #d4c54a;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

/* Sticky monitor bar (session controls) */
#monitor-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 53px; /* below header */
  z-index: 49;
}

#monitor-bar h2 {
  font-size: 16px;
  font-weight: 600;
}

header h1 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

#header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

#connection-status {
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 12px;
}

.status-disconnected {
  background: rgba(224, 82, 96, 0.15);
  color: var(--red);
}

.status-connected {
  background: rgba(76, 175, 120, 0.15);
  color: var(--green);
}

.status-connecting {
  background: rgba(224, 148, 58, 0.15);
  color: var(--orange);
}

main {
  flex: 1;
  padding: 24px;
}

.hidden { display: none !important; }

/* View header */
.view-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

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

#monitor-bar.hidden { display: none !important; }

/* Polling indicator */
.polling-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 1.5s ease-in-out infinite;
}

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

/* Session list */
#sessions-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.placeholder {
  color: var(--text-muted);
  font-size: 14px;
  text-align: center;
  padding: 40px;
}

.session-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.session-card:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.session-card .sid {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
}

.session-card .meta {
  display: flex;
  gap: 20px;
  font-size: 12px;
  color: var(--text-muted);
}

.session-card .meta span {
  white-space: nowrap;
}

/* Back button */
#back-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}

#back-btn:hover {
  background: var(--surface-hover);
}

/* Monitor controls */
.monitor-controls {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.monitor-controls label {
  color: var(--text-muted);
}

.monitor-controls select {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
}

#session-id-display {
  font-family: var(--mono);
  color: var(--accent);
}

/* Event log bar */
#event-log-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-height: 120px;
  overflow-y: auto;
}

.event-log-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  white-space: nowrap;
  padding-top: 2px;
}

#event-log-entries {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.event-tag {
  font-size: 11px;
  font-family: var(--mono);
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.event-tag.starvation {
  background: rgba(224, 82, 96, 0.2);
  color: var(--red);
}

.event-tag.startup {
  background: rgba(76, 175, 120, 0.2);
  color: var(--green);
}

.event-tag.ot {
  background: rgba(108, 124, 255, 0.2);
  color: var(--accent);
}

.event-tag.sf {
  background: rgba(168, 85, 247, 0.2);
  color: #a855f7;
}

.event-tag.st {
  background: rgba(224, 148, 58, 0.2);
  color: var(--orange);
}

.event-tag.background {
  background: rgba(120, 144, 156, 0.2);
  color: #78909c;
}

/* HESP ABR Debug Container (full width, top) */
#hesp-abr-debug-container {
  margin-bottom: 16px;
}

#hesp-abr-debug-container .chart-card {
  border-color: rgba(108, 124, 255, 0.2);
}

#hesp-abr-debug-container .chart-card canvas {
  height: 300px !important;
}

#hesp-event-log-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-height: 120px;
  overflow-y: auto;
}

#hesp-event-log-entries {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

#hesp-charts-container {
  display: contents;
}

#state-timeline-container {
  margin-bottom: 16px;
}

#state-timeline-container .chart-card canvas {
  height: 100px !important;
}

.hesp-chart-card {
  border-color: rgba(108, 124, 255, 0.2);
}

/* HESP event tag colors */
.event-tag.hesp-event {
  font-weight: 500;
}

.event-tag.hesp-event.upswitch {
  background: rgba(76, 175, 120, 0.2);
  color: var(--green);
}

.event-tag.hesp-event.downswitch {
  background: rgba(224, 148, 58, 0.2);
  color: var(--orange);
}

.event-tag.hesp-event.stall {
  background: rgba(224, 82, 96, 0.2);
  color: var(--red);
}

.event-tag.hesp-event.preemptive-downswitch {
  background: rgba(168, 85, 247, 0.2);
  color: #a855f7;
}

/* Charts grid (half-width responsive) */
#charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

/* Charts container */
#charts-container {
  display: contents;
}

.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.chart-card h3 {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chart-card canvas {
  width: 100% !important;
  height: 220px !important;
}

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

/* Session Info Panel */
#session-info-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.session-info-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  white-space: nowrap;
  padding-top: 2px;
}

#session-info-container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.session-info-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.session-info-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.session-info-value {
  font-size: 12px;
  font-family: var(--mono);
  color: var(--accent);
  background: rgba(108, 124, 255, 0.1);
  padding: 1px 6px;
  border-radius: 4px;
}

.session-info-empty {
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
}

/* Layer Chart Container */
#layer-chart-container .chart-card {
  border-color: rgba(108, 124, 255, 0.2);
}

#layer-chart-container .chart-card canvas {
  height: 260px !important;
}

/* Resolution Chart Container */
#resolution-chart-container .chart-card {
  border-color: rgba(108, 124, 255, 0.2);
}

/* Event Table Section */
#event-table-section {
  margin-top: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
}

.event-table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.event-table-title {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.event-count-display {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--mono);
  margin-left: 8px;
}

.event-table-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Filter Dropdown */
.filter-dropdown {
  position: relative;
}

.filter-dropdown-btn {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11px;
  font-family: var(--font);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: background 0.15s, border-color 0.15s;
}

.filter-dropdown-btn:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.filter-count {
  font-size: 10px;
  color: var(--accent);
  font-weight: 600;
}

.filter-dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 0;
  min-width: 220px;
  max-height: 320px;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  transition: background 0.1s;
  user-select: none;
}

.filter-option:hover {
  background: var(--surface-hover);
}

.filter-option input[type="checkbox"] {
  accent-color: var(--accent);
  width: 14px;
  height: 14px;
  cursor: pointer;
  flex-shrink: 0;
}

.filter-option span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.filter-option-all {
  font-weight: 600;
  color: var(--accent);
}

.filter-separator {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.filter-option .filter-event-code {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
  margin-left: auto;
  flex-shrink: 0;
}

/* Prettify checkbox toggle */
.prettify-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.prettify-toggle input[type="checkbox"] {
  accent-color: var(--accent);
  width: 14px;
  height: 14px;
  cursor: pointer;
}

.event-table-wrapper {
  height: 400px;
  overflow-y: auto;
  overflow-x: auto;
}

#event-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
  font-family: var(--mono);
}

#event-table thead {
  position: sticky;
  top: 0;
  z-index: 1;
}

#event-table th {
  background: var(--surface);
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 5px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

#event-table td {
  padding: 3px 8px;
  border-bottom: 1px solid rgba(46, 51, 68, 0.4);
  vertical-align: middle;
}

#event-table tr:hover td {
  background: var(--surface-hover);
}

.et-ts {
  color: var(--text-muted);
  white-space: nowrap;
  font-size: 11px;
}

.et-type {
  white-space: nowrap;
  font-weight: 500;
}

.et-type.event-type-known {
  color: var(--accent);
}

.et-type.event-type-unknown {
  color: var(--orange);
}

.et-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  line-height: 1;
}

.kv-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 3px;
  overflow: hidden;
  font-size: 10px;
  line-height: 1.3;
  border: 1px solid rgba(46, 51, 68, 0.6);
}

.kv-name {
  padding: 1px 4px;
  background: rgba(108, 124, 255, 0.15);
  color: var(--accent);
  font-weight: 500;
  white-space: nowrap;
}

.kv-val {
  padding: 1px 4px;
  background: rgba(76, 175, 120, 0.1);
  color: var(--green);
  white-space: nowrap;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Responsive */
@media (max-width: 900px) {
  #charts-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  main { padding: 16px; }
  #charts-grid { grid-template-columns: 1fr; }
  .session-card { flex-direction: column; align-items: flex-start; gap: 8px; }
  #session-info-container { flex-direction: column; }
  .event-table-wrapper { max-height: 300px; }
}