:root {
  --bg:       #0d1117;
  --surface:  #161b22;
  --border:   #30363d;
  --text:     #e6edf3;
  --muted:    #8b949e;
  --cyan:     #00d4ff;
  --cyan-dim: #002d3a;
  --green:    #3fb950;
  --orange:   #f78166;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 13px;
  height: 100vh;
  overflow: hidden;
}

/* ── MAIN ─────────────────────────────────────────────── */
#main {
  display: flex;
  height: 100vh;
}

/* ── LEFT PANEL ───────────────────────────────────────── */
#leftPanel {
  width: 40%;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#dataset-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#dataset-bar select {
  flex: 1;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
}

#data-count { color: var(--muted); font-size: 11px; white-space: nowrap; }

#upload-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  white-space: nowrap;
  transition: all 0.15s;
  flex-shrink: 0;
}
#upload-btn:hover { border-color: var(--cyan); color: var(--cyan); }

#table-wrap { flex: 1; overflow: auto; min-height: 0; }

#data-table { width: 100%; border-collapse: collapse; font-size: 12px; }

#data-table th {
  position: sticky;
  top: 0;
  background: var(--surface);
  color: var(--cyan);
  padding: 6px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}

#data-table td {
  padding: 4px 8px;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

#data-table tr:hover td { background: var(--surface); }
.target-col { color: var(--orange); }

/* ── RIGHT PANEL ──────────────────────────────────────── */
#rightPanel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ── TAB BAR ──────────────────────────────────────────── */
#tab-bar {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 6px 10px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 5px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  white-space: nowrap;
  transition: all 0.15s;
}
.tab-btn:hover  { color: var(--text); background: var(--border); }
.tab-btn.active { background: var(--cyan-dim); border-color: var(--cyan); color: var(--cyan); font-weight: 600; }
.tab-btn.done   { color: var(--green); }

.tab-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ── TAB CONTENT ──────────────────────────────────────── */
#tab-content {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* ── INTRO TAB ────────────────────────────────────────── */
#intro-tab {
  padding: 0;
  overflow-y: auto;
  flex: 1;
}

#intro-tab img {
  width: 100%;
  display: block;
}

.intro-body {
  padding: 20px 24px;
  line-height: 1.8;
  color: var(--muted);
  font-size: 13px;
}

.intro-body h2 { color: var(--cyan); font-size: 15px; margin-bottom: 8px; }
.intro-body h3 { color: var(--text); font-size: 13px; margin: 14px 0 6px; }
.intro-body p  { margin-bottom: 10px; }

/* ── STAGE TABS ───────────────────────────────────────── */
.stage-tab {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

.stage-controls {
  flex-shrink: 0;
  padding: 12px 14px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.stage-title { font-size: 13px; color: var(--cyan); font-weight: 600; margin-bottom: 8px; }
.stage-desc  { color: var(--muted); font-size: 12px; line-height: 1.6; margin-top: 6px; }

.stage-chart { flex: 1; min-height: 0; overflow: hidden; }

/* ── CONTROLS ─────────────────────────────────────────── */
.ctrl-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.ctrl-label { color: var(--muted); font-size: 12px; white-space: nowrap; }

.ctrl-row select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.ctrl-row input[type=range] {
  accent-color: var(--cyan);
  flex: 1;
  min-width: 80px;
}

.k-val { color: var(--cyan); font-weight: 700; min-width: 48px; }

.btn {
  padding: 6px 16px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.btn:hover    { opacity: 0.82; }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn-primary  { background: var(--cyan); color: #000; }

/* ── STATS ────────────────────────────────────────────── */
#stats-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
  margin-bottom: 10px;
}

.stat-box { background: var(--bg); border: 1px solid var(--border); border-radius: 4px; padding: 4px; text-align: center; }
.stat-label { color: var(--muted); font-size: 10px; }
.stat-value { color: var(--cyan); font-size: 12px; font-weight: 600; }

/* ── BADGES ───────────────────────────────────────────── */
.norm-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #1a3300;
  border: 1px solid var(--green);
  color: var(--green);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
}

.accuracy-badge {
  display: inline-block;
  background: var(--cyan-dim);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  padding: 4px 14px;
  border-radius: 16px;
  font-size: 14px;
  font-weight: 700;
}

/* ── BEFORE/AFTER ─────────────────────────────────────── */
.before-after {
  display: flex;
  gap: 8px;
  padding: 10px;
  height: 100%;
}
.before-after > div { flex: 1; display: flex; flex-direction: column; }
.chart-label         { text-align: center; font-size: 11px; margin-bottom: 4px; color: var(--muted); }
.chart-label.after   { color: var(--green); }
.chart-sub           { flex: 1; min-height: 0; }

/* ── INTRO COMPONENTS ────────────────────────────────── */
.intro-gap-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 14px 0 8px;
}

.gap-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
}

.gap-label { color: var(--text); font-weight: 600; font-size: 13px; }
.gap-desc  { color: var(--muted); font-size: 11px; }

.gap-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.gap-wall { font-size: 22px; color: var(--orange); font-weight: 700; }
.gap-hint { color: var(--orange); font-size: 10px; white-space: nowrap; }

.intro-pipeline {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin: 10px 0 14px;
  flex-wrap: wrap;
}

.pipe-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  flex: 1;
  min-width: 80px;
}

.pipe-icon { font-size: 20px; }
.pipe-name { color: var(--cyan); font-size: 12px; font-weight: 600; }
.pipe-desc { color: var(--muted); font-size: 10px; text-align: center; }
.pipe-arrow { color: var(--border); font-size: 18px; flex-shrink: 0; }

.intro-audience {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 10px 0;
}

.audience-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 10px;
  background: var(--surface);
  border-radius: 6px;
  font-size: 12px;
}

.aud-who { color: var(--cyan); font-weight: 600; min-width: 70px; white-space: nowrap; }
.aud-sep { color: var(--border); }
.aud-what { color: var(--muted); }

.intro-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 10px 0 16px;
}

.intro-list li {
  padding: 8px 12px;
  background: var(--surface);
  border-left: 3px solid var(--cyan);
  border-radius: 0 6px 6px 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.intro-list li strong { color: var(--text); }

.aud-next { border-left: 2px solid var(--green); border-radius: 0 6px 6px 0; padding-left: 8px; }
.aud-next .aud-who { color: var(--green); }

.intro-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
}

/* ── LOG TAB ──────────────────────────────────────────── */
#log-tab {
  flex: 1;
  overflow-y: auto;
  padding: 10px 14px;
}

.log-item { display: flex; gap: 10px; padding: 3px 0; font-size: 12px; border-bottom: 1px solid var(--border); }
.log-time { color: var(--border); font-variant-numeric: tabular-nums; flex-shrink: 0; }
.log-msg  { color: var(--text); }