:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --border: #334155;
  --green: #22c55e;
  --yellow: #eab308;
  --red: #ef4444;
}

* { 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);
  line-height: 1.6;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Header */
header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}
header h1 { font-size: 20px; font-weight: 600; }
header .subtitle { color: var(--text-muted); font-size: 14px; }
nav { margin-top: 8px; display: flex; gap: 16px; }
nav a { color: var(--text-muted); font-size: 14px; }
nav a:hover, nav a.active { color: var(--accent); }

/* Stat Cards */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; margin: 24px 0; }
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.stat-card .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-card .value { font-size: 24px; font-weight: 700; margin-top: 4px; }

/* Filters */
.filters {
  display: flex; gap: 12px; flex-wrap: wrap; margin: 16px 0;
  align-items: center;
}
.filters input, .filters select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
}
.filters input:focus, .filters select:focus {
  outline: none; border-color: var(--accent);
}

/* Session Table */
.session-table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.session-table th {
  text-align: left; padding: 10px 12px; font-size: 12px;
  color: var(--text-muted); text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}
.session-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
.session-table tr:hover td { background: var(--bg-hover); }
.session-table .project { color: var(--accent); font-weight: 500; }
.session-table .duration { color: var(--text-muted); text-align: right; }
.session-table .msgs { color: var(--text-muted); text-align: right; }

/* Tags */
.tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 12px; font-weight: 500;
}
.tag-dev { background: #1e3a5f; color: #60a5fa; }
.tag-config { background: #3b2f1a; color: #eab308; }
.tag-debug { background: #3b1a1a; color: #ef4444; }
.tag-writing { background: #1a3b2f; color: #22c55e; }
.tag-analysis { background: #2f1a3b; color: #a78bfa; }
.tag-learning { background: #1a3b3b; color: #2dd4bf; }
.tag-org { background: #3b3b1a; color: #fbbf24; }

/* Session Detail */
.session-detail { margin: 24px 0; }
.session-detail h2 { font-size: 18px; margin-bottom: 16px; }
.meta-grid { display: grid; grid-template-columns: 140px 1fr; gap: 8px; margin: 16px 0; }
.meta-grid .key { color: var(--text-muted); font-size: 14px; }
.meta-grid .val { font-size: 14px; }
.summary-box {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px; margin: 16px 0;
}
.summary-box h3 { font-size: 14px; color: var(--text-muted); margin-bottom: 8px; }

/* Digest */
.digest-session { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin: 12px 0; }
.digest-session h3 { font-size: 16px; margin-bottom: 8px; }
.digest-session .time { color: var(--text-muted); font-size: 13px; }

/* Sortable Headers */
th.sortable { cursor: pointer; user-select: none; }
th.sortable:hover { color: var(--accent); }
.sort-arrow { font-size: 10px; margin-left: 2px; }

/* Unsummarized */
.unsummarized { color: var(--text-muted); font-style: italic; }
.tag-unsummarized { background: #1e1e2e; color: #666; }

/* Checkbox & Bulk Actions */
th.actions, td.actions { text-align: center; width: 40px; }
.row-select { cursor: pointer; }
.bulk-bar {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 16px; margin: 12px 0;
  position: sticky; bottom: 16px; z-index: 10;
}
.bulk-bar span { color: var(--text); font-size: 14px; }
.btn-bulk-delete {
  background: var(--red); color: #fff; border: none;
  border-radius: 4px; padding: 6px 16px; cursor: pointer; font-size: 13px;
}
.btn-bulk-delete:hover { opacity: 0.85; }
.btn-bulk-delete:disabled { opacity: 0.4; cursor: default; }

/* Delete Recommendation Tags */
.tag-deletable { background: #1a3b2f; color: #22c55e; }
.tag-low { background: #2a2a2a; color: #777; }

/* Expandable Rows */
tr.expandable { cursor: pointer; }
tr.expandable:hover td { background: var(--bg-hover); }
tr.expanded td { border-bottom: none; }
.expand-row td { padding: 0 16px 16px 16px; background: var(--bg-card); border-bottom: 1px solid var(--border); }
.expand-content { font-size: 13px; line-height: 1.7; padding: 8px 12px; }
.expand-content h4 { color: var(--text-muted); font-size: 12px; text-transform: uppercase; margin: 10px 0 4px; }
.expand-content h4:first-child { margin-top: 0; }
.expand-content ul { padding-left: 20px; margin: 4px 0; }
.expand-content li { margin: 2px 0; }

/* Footer */
footer { text-align: center; padding: 32px 0; color: var(--text-muted); font-size: 13px; border-top: 1px solid var(--border); margin-top: 48px; }