/* ═══════════════════════════════════════════
   RIGHT PANEL
═══════════════════════════════════════════ */

#right-panel {
  width: var(--panel-w);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  overflow: hidden;
  flex-shrink: 0;
}

.panel-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.panel-tab {
  flex: 1;
  padding: 11px 6px;
  text-align: center;
  font-size: 11.5px;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-muted);
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  transition: all var(--t-fast) var(--ease);
  white-space: nowrap;
}
.panel-tab:hover { color: var(--text-secondary); }
.panel-tab.active { color: var(--text-accent); border-bottom-color: var(--accent-purple); }

.panel-content {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-4);
}
.panel-content.active { display: block; }

/* ── Info Tab ── */
.info-block { margin-bottom: var(--sp-4); }

.info-label {
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--sp-2);
}

.info-text {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.step-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 10px 12px;
  background: var(--bg-card);
  border-radius: var(--r-md);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent-purple);
  min-height: 52px;
  transition: border-color 0.15s;
}

.legend { display: flex; flex-direction: column; gap: 5px; }
.legend-item { display: flex; align-items: center; gap: var(--sp-2); font-size: 11.5px; color: var(--text-secondary); }
.legend-dot { width: 10px; height: 10px; border-radius: 3px; flex-shrink: 0; }

.complexity-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.complexity-table td { padding: 5px 0; color: var(--text-secondary); }
.complexity-table td:last-child { text-align: right; font-family: var(--font-mono); color: var(--text-accent); }
.complexity-table tr:not(:last-child) td { border-bottom: 1px solid var(--border-subtle); }

/* ── Code Tab ── */
.pseudo-block {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.9;
  color: var(--text-secondary);
  background: var(--bg-card);
  border-radius: var(--r-md);
  padding: var(--sp-3);
  border: 1px solid var(--border-subtle);
  white-space: pre-wrap;
  word-break: break-word;
}

.pseudo-line {
  display: block;
  padding: 1px 5px;
  margin: 0 -5px;
  border-radius: 4px;
  transition: background 0.12s, color 0.12s;
}
.pseudo-line.highlight {
  background: rgba(99,102,241,0.18);
  color: #c4c8ff;
}

.pseudo-kw   { color: #c792ea; }
.pseudo-fn   { color: #82aaff; }
.pseudo-num  { color: #f78c6c; }
.pseudo-str  { color: #c3e88d; }
.pseudo-cmt  { color: #546e7a; font-style: italic; }

.code-lang-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.lang-btn {
  padding: 4px 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-default);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 11px;
  cursor: pointer;
  transition: all var(--t-fast);
}
.lang-btn:hover { color: var(--text-secondary); }
.lang-btn.active { background: var(--accent-purple-dim); color: var(--text-accent); border-color: var(--border-accent); }

/* ── Stats Tab ── */
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-2); margin-bottom: var(--sp-3); }

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  padding: 10px 12px;
}
.stat-label { font-size: 9.5px; color: var(--text-muted); margin-bottom: 4px; font-weight: 500; letter-spacing: 0.5px; text-transform: uppercase; }
.stat-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 0.2s;
}
.stat-value.purple { color: var(--accent-violet); }
.stat-value.amber  { color: var(--accent-amber); }
.stat-value.cyan   { color: var(--accent-cyan); }
.stat-value.green  { color: var(--accent-emerald); }

.compare-delta { font-size: 12px; color: var(--text-secondary); line-height: 1.6; }
.compare-delta .better { color: var(--accent-emerald); }
.compare-delta .worse  { color: var(--accent-rose); }