/* ── Output panel (right) ── */
#panel {
  width: 420px;
  min-width: 180px;
  max-width: 60vw;
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  position: relative;
  transition: width 0.2s;
}
#panel.collapsed { width: 32px !important; min-width: 32px; overflow: hidden; }
#panel.collapsed .panel-tab-bar,
#panel.collapsed .panel-body,
#panel.collapsed .panel-collapse-bar { display: none; }

.panel-header-row {
  display: flex;
  align-items: stretch;
  background: var(--tab-inactive-bg);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  height: 35px;
}
.panel-tab-bar {
  display: flex;
  flex: 1;
  background: transparent;
  overflow-x: auto;
}
.panel-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  cursor: pointer;
  font-size: 11.5px;
  font-weight: 400;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  border-right: 1px solid var(--border);
  transition: all 0.12s;
  white-space: nowrap;
  user-select: none;
}
.panel-tab:hover { color: var(--text-primary); background: var(--bg-hover); }
.panel-tab.active {
  color: var(--text-bright);
  background: var(--bg-panel);
  border-bottom-color: var(--accent-blue);
}

.panel-body { flex: 1; overflow: auto; padding: 14px; display: none; }
.panel-body.active { display: block; }

.panel-toggle-btn {
  flex-shrink: 0;
  width: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: transparent;
  border: none;
  border-left: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 14px;
  transition: background 0.12s, color 0.12s;
}
.panel-toggle-btn:hover { background: var(--bg-hover); color: var(--text-primary); }

/* Collapsed stub */
.panel-stub {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 10px;
  gap: 8px;
  width: 32px;
  height: 100%;
}
#panel.collapsed .panel-stub { display: flex; }
.panel-stub-label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 1px;
  cursor: pointer;
  padding: 4px 0;
  white-space: nowrap;
}
.panel-stub-icon { font-size: 14px; color: var(--text-muted); cursor: pointer; }

/* Code output block */
.code-out {
  font-family: var(--font-mono);
  font-size: 12px;
  background: #141414;
  border-radius: var(--radius-md);
  padding: 14px;
  white-space: pre-wrap;
  word-break: break-word;
  border: 1px solid var(--border);
  min-height: 60px;
  color: #d4d4d4;
  line-height: 1.7;
}

.stage-label {
  font-size: 10.5px;
  font-weight: 700;
  color: #569cd6;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 14px 0 6px;
}
.stage-label:first-child { margin-top: 0; }

.hex-row  { display: flex; gap: 12px; font-size: 11px; margin: 2px 0; }
.hex-off  { color: var(--accent-cyan); min-width: 46px; font-family: var(--font-mono); }
.hex-bytes{ color: #4ec9b0; font-family: var(--font-mono); flex: 1; }
.hex-bin  { color: #555; font-family: var(--font-mono); font-size: 10px; }

/* ── Panel error bar ── */
#panel-error-bar {
  display: none;
  background: #2a0a0a;
  border-top: 1px solid var(--accent-red);
  border-bottom: 1px solid #3a1a1a;
  padding: 10px 16px;
  font-size: 11.5px;
  color: var(--accent-red);
  font-family: var(--font-mono);
  flex-shrink: 0;
  line-height: 1.6;
}
#panel-error-bar .err-title {
  font-weight: 700;
  font-size: 12px;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}
#panel-error-bar .err-body { color: #ff9b9b; white-space: pre-wrap; word-break: break-word; }
#panel-error-bar .err-close {
  margin-left: auto;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
}
#panel-error-bar .err-close:hover { color: #fff; }