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

:root {
  --bg:       #0d1117;
  --surface:  #161b22;
  --border:   #30363d;
  --text:     #e6edf3;
  --muted:    #8b949e;
  --accent:   #58a6ff;
  --success:  #3fb950;
  --error:    #f85149;
  --warning:  #d29922;
  --radius:   6px;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ───────────────────────────────────────────────────────────────────── */
nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 56px;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.nav-logo span { color: var(--accent); }

.nav-links { display: flex; gap: 4px; flex: 1; }

.nav-links a {
  color: var(--muted);
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 14px;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  text-decoration: none;
}

/* ── Layout ────────────────────────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
}

/* ── Hero ──────────────────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 48px 0 32px;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 24px;
}

/* ── Cards ─────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

/* ── Metric Cards ──────────────────────────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  text-align: center;
}

.metric-card .metric-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.metric-card .metric-label {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.metric-card.success .metric-value { color: var(--success); }
.metric-card.error   .metric-value { color: var(--error); }
.metric-card.warning .metric-value { color: var(--warning); }

/* ── Tables ────────────────────────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
}

thead tr {
  border-bottom: 1px solid var(--border);
}

thead th {
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: rgba(255, 255, 255, 0.03); }

td {
  padding: 12px 16px;
  vertical-align: middle;
  color: var(--text);
}

/* ── Badges ────────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.badge-success  { background: rgba(63, 185, 80, 0.15);  color: var(--success); }
.badge-error    { background: rgba(248, 81, 73, 0.15);  color: var(--error); }
.badge-warning  { background: rgba(210, 153, 34, 0.15); color: var(--warning); }
.badge-pending  { background: rgba(88, 166, 255, 0.15); color: var(--accent); }
.badge-running  { background: rgba(88, 166, 255, 0.15); color: var(--accent); }
.badge-muted    { background: rgba(139, 148, 158, 0.15); color: var(--muted); }

.badge-easy   { background: rgba(63, 185, 80, 0.15);  color: var(--success); }
.badge-medium { background: rgba(210, 153, 34, 0.15); color: var(--warning); }
.badge-hard   { background: rgba(248, 81, 73, 0.15);  color: var(--error); }

/* ── Rank ──────────────────────────────────────────────────────────────────── */
.rank {
  font-weight: 700;
  color: var(--muted);
  font-size: 16px;
}

.rank.gold   { color: #ffd700; }
.rank.silver { color: #c0c0c0; }
.rank.bronze { color: #cd7f32; }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #4493e0;
  border-color: #4493e0;
  text-decoration: none;
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--muted);
  text-decoration: none;
}

.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ── Actions bar ───────────────────────────────────────────────────────────── */
.actions {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

/* ── Section headers ───────────────────────────────────────────────────────── */
h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

/* ── Diff Viewer ───────────────────────────────────────────────────────────── */
.diff-viewer {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  overflow-x: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
}

.diff-line {
  display: block;
  padding: 2px 12px;
  white-space: pre;
}

.diff-line.added   { background: rgba(63, 185, 80, 0.15); color: #7ee787; }
.diff-line.removed { background: rgba(248, 81, 73, 0.15); color: #ffa198; }
.diff-line.context { color: var(--muted); }

.diff-empty {
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* ── Trajectory Timeline ───────────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 24px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  margin-bottom: 16px;
}

.timeline-dot {
  position: absolute;
  left: -20px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
}

.timeline-dot.tool  { background: var(--accent); }
.timeline-dot.result { background: var(--success); }
.timeline-dot.error { background: var(--error); }

.timeline-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.timeline-tool {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
}

.timeline-ts {
  font-size: 11px;
  color: var(--muted);
  margin-left: auto;
}

.timeline-body {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 80px;
  overflow: hidden;
}

/* ── Task info ─────────────────────────────────────────────────────────────── */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.info-item label {
  display: block;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.info-item span {
  font-size: 14px;
  color: var(--text);
}

.code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(255,255,255,0.05);
  padding: 2px 6px;
  border-radius: 3px;
}

/* ── Score bar ─────────────────────────────────────────────────────────────── */
.score-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.score-bar-bg {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.score-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
}

/* ── Spinner ───────────────────────────────────────────────────────────────── */
@keyframes spin { to { transform: rotate(360deg); } }

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ── Empty state ───────────────────────────────────────────────────────────── */
.empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--muted);
}

.empty h3 { color: var(--muted); font-size: 1.1rem; margin-bottom: 8px; }
.empty p  { font-size: 13px; margin-bottom: 16px; }

/* ── Modal ─────────────────────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.modal-overlay.open { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 480px;
  max-width: 95vw;
}

.modal h3 { margin-bottom: 16px; }

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group select,
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

.form-group textarea {
  font-family: var(--font-mono);
  font-size: 12px;
  resize: vertical;
  min-height: 120px;
}

.form-group select:focus,
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 8px; }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .container { padding: 16px; }
  .hero h1   { font-size: 1.75rem; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  nav { gap: 12px; padding: 0 16px; }
}

/* ── Metrics Sections ──────────────────────────────────────────────────────── */
.metrics-section {
  margin-bottom: 0;
}

.metrics-section + h2 {
  margin-top: 8px;
}

/* ── Horizontal bar visualization ──────────────────────────────────────────── */
.metric-bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.metric-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* ── Stacked bar ───────────────────────────────────────────────────────────── */
.stacked-bar {
  display: flex;
  height: 12px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--border);
}

.stacked-bar-segment {
  height: 100%;
  min-width: 2px;
  transition: width 0.3s ease;
}

/* ── Phase colors ──────────────────────────────────────────────────────────── */
.phase-exploration   { background: var(--accent) !important; }
.phase-implementation { background: var(--success) !important; }
.phase-testing       { background: var(--warning) !important; }
.phase-debugging     { background: var(--error) !important; }

.phase-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 3px;
}

/* Timeline dots with phase colors */
.timeline-dot.phase-exploration   { background: var(--accent); }
.timeline-dot.phase-implementation { background: var(--success); }
.timeline-dot.phase-testing       { background: var(--warning); }
.timeline-dot.phase-debugging     { background: var(--error); }

/* Phase badges in timeline */
.phase-badge-exploration   { background: rgba(88, 166, 255, 0.15); color: var(--accent); }
.phase-badge-implementation { background: rgba(63, 185, 80, 0.15); color: var(--success); }
.phase-badge-testing       { background: rgba(210, 153, 34, 0.15); color: var(--warning); }
.phase-badge-debugging     { background: rgba(248, 81, 73, 0.15); color: var(--error); }

/* ── Tool chart ────────────────────────────────────────────────────────────── */
.tool-chart {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tool-chart-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-chart-label {
  width: 140px;
  font-size: 11px;
  color: var(--muted);
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-chart-count {
  width: 28px;
  font-size: 11px;
  text-align: right;
  flex-shrink: 0;
}

/* ── Score color classes ───────────────────────────────────────────────────── */
.score-good { color: var(--success); }
.score-warn { color: var(--warning); }
.score-bad  { color: var(--error); }

/* Score bar fill color variants */
.score-bar-fill.fill-success { background: var(--success); }
.score-bar-fill.fill-warning { background: var(--warning); }
.score-bar-fill.fill-error   { background: var(--error); }

/* text-warning utility (missing from original) */
.text-warning { color: var(--warning); }

/* ── Utility ───────────────────────────────────────────────────────────────── */
.text-muted   { color: var(--muted); }
.text-success { color: var(--success); }
.text-error   { color: var(--error); }
.text-accent  { color: var(--accent); }
.mono         { font-family: var(--font-mono); }
.mt-0  { margin-top: 0; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }