:root {
  color-scheme: light;
  --page-plane:      #f9f9f7;
  --surface-1:       #fcfcfb;
  --text-primary:    #0b0b0b;
  --text-secondary:  #52514e;
  --text-muted:      #898781;
  --gridline:        #e1e0d9;
  --baseline:        #c3c2b7;
  --border:          rgba(11, 11, 11, 0.10);

  --series-actual:   #2a78d6;
  --series-predicted: #f59e0b;
  --series-plan:     #eb6834;

  --seq-300:         #6da7ec;
  --seq-450:         #2a78d6;
  --seq-600:         #184f95;

  --status-good:     #0ca30c;
  --status-critical: #d03b3b;

  --accent:          #2a78d6;
  --accent-light:    #e8f0fb;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page-plane:      #0d0d0d;
    --surface-1:       #1a1a19;
    --text-primary:    #ffffff;
    --text-secondary:  #c3c2b7;
    --text-muted:      #898781;
    --gridline:        #2c2c2a;
    --baseline:        #383835;
    --border:          rgba(255, 255, 255, 0.10);

  --series-actual:   #3987e5;
  --series-predicted: #f59e0b;
  --series-plan:     #d95926;

    --seq-300:         #5598e7;
    --seq-450:         #3987e5;
    --seq-600:         #104281;

    --status-good:     #0ca30c;
    --status-critical: #e66767;

    --accent:          #3987e5;
    --accent-light:    #1a2a3d;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page-plane);
  color: var(--text-primary);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.page-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.page-header h1 {
  font-size: 1.2rem;
  margin: 0 0 2px;
}

.subtitle {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.85rem;
}

.layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.left-panel {
  flex: 3;
  overflow-y: auto;
  padding: 20px;
  border-right: 1px solid var(--border);
}

.right-panel {
  flex: 2;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 20px;
  gap: 16px;
}

.right-panel-scroll {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  animation: fade-in 0.25s ease-out;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-title {
  font-size: 1.1rem;
  margin: 0 0 2px;
}

.section-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0 0 16px;
}

/* --- ask card --- */
.ask-card {
  padding: 12px 16px;
  flex-shrink: 0;
}

#ask-form {
  display: flex;
  gap: 8px;
}

#question-input {
  flex: 1;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--baseline);
  background: var(--page-plane);
  color: var(--text-primary);
  font-size: 0.95rem;
}

#ask-form button {
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
}

#ask-form button:hover {
  filter: brightness(1.08);
}

/* --- suggestion card --- */
.suggestion-card {
  cursor: pointer;
  border-color: var(--accent);
  border-width: 1.5px;
  transition: background 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
}

.suggestion-card:hover {
  background: var(--accent-light);
  box-shadow: 0 1px 6px rgba(0,0,0,0.08);
}

.suggestion-label {
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin: 0 0 6px;
}

.suggestion-text {
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.4;
  color: var(--text-primary);
}

/* --- transcript --- */
.transcript {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* --- fallback card --- */
.you-asked {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0 8px;
}

.you-asked::before {
  content: "You asked: ";
}

.fallback-message {
  font-weight: 500;
  margin: 0 0 8px;
}

.supported-question {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

/* --- step card --- */
.analysis-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-card {
  border-left: 3px solid var(--accent);
}

.step-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0 0 2px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.step-title {
  font-size: 1rem;
  margin: 0 0 12px;
}

.step-narrative {
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 0.9rem;
  margin: 12px 0 0;
}

.step-caveat {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-left: 2px solid var(--text-muted);
  padding-left: 10px;
  margin: 10px 0 0;
  line-height: 1.4;
}

.step-caveat:empty { display: none; }

.step-compact {
  border-left-color: var(--text-muted);
  background: color-mix(in srgb, var(--surface-1) 96%, var(--text-muted));
}

.step-compact .step-narrative {
  color: var(--text-secondary);
  font-style: italic;
  margin-top: 0;
}

/* --- chart primitives --- */
.chart-legend {
  display: flex;
  gap: 16px;
  margin-bottom: 10px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.legend-swatch {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 2px;
  margin-right: 5px;
  vertical-align: -1px;
}

.bar-group {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  height: 160px;
  border-bottom: 1px solid var(--baseline);
  padding: 0 4px;
}

.bar-period {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 1;
  min-width: 80px;
}

.bar-pair {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 140px;
}

.bar {
  width: 18px;
  border-radius: 4px 4px 0 0;
  min-height: 2px;
  position: relative;
}

.bar[title]:hover::after {
  content: attr(title);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--surface-1);
  font-size: 0.7rem;
  padding: 3px 6px;
  border-radius: 4px;
  white-space: nowrap;
  margin-bottom: 4px;
  z-index: 1;
}

.bar-actual { background: var(--series-actual); }
.bar-predicted { background: var(--series-predicted); }
.bar-plan { background: var(--series-plan); }
.bar-seq-300 { background: var(--seq-300); }
.bar-seq-450 { background: var(--seq-450); }
.bar-seq-600 { background: var(--seq-600); }

.bar-period-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-align: center;
  white-space: nowrap;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.data-table th, .data-table td {
  text-align: right;
  padding: 6px 8px;
  border-bottom: 1px solid var(--gridline);
  font-variant-numeric: tabular-nums;
}

.data-table th:first-child, .data-table td:first-child {
  text-align: left;
}

.data-table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.waterfall {
  display: flex;
  gap: 24px;
  align-items: flex-end;
  height: 140px;
  border-bottom: 1px solid var(--baseline);
  margin-bottom: 10px;
}

.waterfall .bar-period-label { margin-top: 4px; }

.variance-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 10px;
}

.variance-pill.good { color: var(--status-good); background: color-mix(in srgb, var(--status-good) 12%, transparent); }
.variance-pill.critical { color: var(--status-critical); background: color-mix(in srgb, var(--status-critical) 12%, transparent); }

.disclosure {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--gridline);
  margin-top: 14px;
  padding-top: 12px;
}

.disclosure-icon {
  color: var(--status-critical);
  flex-shrink: 0;
}

.no-data {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.85rem;
}

/* --- plan card --- */
.plan-card {
  flex-shrink: 0;
}

.plan-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-weight: 600;
  font-size: 0.85rem;
}

.plan-icon {
  font-size: 1rem;
}

.plan-steps {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.plan-step {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.8rem;
  padding: 4px 0;
}

.plan-step-num {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.plan-step-title {
  font-weight: 500;
  color: var(--text-primary);
  display: block;
  line-height: 1.3;
}

.plan-step-subtitle {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
  line-height: 1.3;
  margin-top: 1px;
}

.plan-run-btn {
  display: block;
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
  transition: filter 0.15s;
}

.plan-run-btn:hover {
  filter: brightness(1.08);
}

.plan-run-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.plan-status-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 14px;
}

.plan-bl-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
}

.plan-bl-name {
  font-weight: 600;
  min-width: 40px;
}

.plan-bl-check {
  font-size: 0.85rem;
}

.plan-bl-done {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.plan-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
  padding: 10px;
  background: color-mix(in srgb, var(--surface-1) 98%, var(--accent));
  border: 1px solid var(--border);
  border-radius: 8px;
}

.plan-actions-header {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.plan-action {
  padding: 8px 10px;
  background: var(--surface-1);
  border: 1px solid var(--gridline);
  border-radius: 6px;
}

.plan-action-title {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  display: block;
  margin-bottom: 2px;
}

.plan-action-detail {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: block;
  line-height: 1.35;
}

.plan-footer {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
}

.match-card {
  border-left: 3px solid var(--accent);
}

.match-confidence {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0 0 4px;
}

.matched-question {
  font-weight: 500;
  margin: 0;
  font-size: 0.9rem;
}

.running-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 12px 16px;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--gridline);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.loading-text {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-style: italic;
}

.analysis-toolbar {
  display: none;
  justify-content: flex-end;
  margin-bottom: 12px;
}

.clear-btn {
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--baseline);
  background: var(--surface-1);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
}

.clear-btn:hover {
  background: var(--page-plane);
  color: var(--text-primary);
}

/* --- progress card --- */
.progress-card {
  margin-bottom: 16px;
}

.progress-title {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0 0 10px;
  font-weight: 500;
}

.progress-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.progress-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
}

.progress-bl {
  font-weight: 600;
  min-width: 48px;
  color: var(--text-primary);
}

.progress-status {
  font-variant-numeric: tabular-nums;
}

.status-pending { color: var(--text-muted); }
.status-running { color: var(--accent); }
.status-done    { color: var(--status-good); }
.status-skip    { color: var(--status-critical); font-size: 0.8rem; }