/* AST Explorer & Refactor Lab — styles */

html, body { overflow: hidden; }

.hub-link { text-decoration: none; font-size: 18px; margin-right: 4px; }

.toolbar-divider {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  margin: 0 4px;
  flex-shrink: 0;
}

.app-body.split {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

.pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.pane-source { flex: 1 1 38%; border-right: 1px solid var(--border-color); }
.pane-tree { flex: 1 1 32%; border-right: 1px solid var(--border-color); }
.pane-right { flex: 1 1 30%; }

.pane-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  font-weight: 600;
  flex-shrink: 0;
}
.pane-header .spacer { flex: 1; }
.pane-header select, .pane-header input[type="text"] {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 3px 6px;
  font-size: 12px;
  text-transform: none;
  letter-spacing: 0;
}

.pane-body { flex: 1; min-height: 0; overflow: hidden; position: relative; }

/* ── Source editor ── */
.editor-host { position: absolute; inset: 0; }

/* ── AST tree ── */
.ast-scroll {
  height: 100%;
  overflow: auto;
  padding: 8px 4px;
  font-family: 'Cascadia Code', 'Fira Code', Consolas, monospace;
  font-size: 12px;
  line-height: 1.5;
}

.ast-row {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 1px 4px;
  white-space: nowrap;
  cursor: pointer;
  border-radius: 3px;
  user-select: none;
}
.ast-row:hover { background: var(--bg-hover); }
.ast-row.selected { background: var(--accent-light); color: var(--accent); }
.ast-row.selected .ast-kind { color: var(--accent); }

.ast-toggle {
  display: inline-block;
  width: 12px;
  text-align: center;
  color: var(--text-muted);
  flex-shrink: 0;
}
.ast-toggle.leaf { color: transparent; }
.ast-kind { color: var(--text-primary); font-weight: 600; }
.ast-field { color: var(--text-muted); }
.ast-val { color: var(--accent); }
.ast-val-string { color: #16a34a; }
.ast-loc { color: var(--text-muted); margin-left: 4px; font-size: 11px; }

/* ── Node details ── */
.details-body {
  padding: 10px 12px;
  font-size: 13px;
  overflow: auto;
  height: 100%;
}
.details-body pre {
  background: var(--bg-secondary);
  padding: 10px;
  border-radius: 4px;
  font-family: 'Cascadia Code', 'Fira Code', Consolas, monospace;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: auto;
  max-height: 60vh;
}
.details-body dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 4px 12px;
  margin: 0 0 10px;
}
.details-body dt { color: var(--text-muted); font-weight: 600; }
.details-body dd { margin: 0; color: var(--text-primary); }

/* ── Tabs (right pane) ── */
.right-tabs {
  display: flex;
  gap: 4px;
  padding: 6px 8px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}
.right-tab {
  padding: 4px 10px;
  border: 1px solid transparent;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
}
.right-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.right-tab-spacer { flex: 1; }

/* ── Refactor panel ── */
.refactor-body {
  padding: 10px 12px;
  font-size: 13px;
  overflow: auto;
  height: 100%;
}
.recipe-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}
.recipe {
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-secondary);
  cursor: pointer;
  transition: border-color 0.1s;
}
.recipe:hover { border-color: var(--accent); }
.recipe.selected { border-color: var(--accent); background: var(--accent-light); }
.recipe-label { font-weight: 600; color: var(--text-primary); margin-bottom: 2px; }
.recipe-desc { font-size: 12px; color: var(--text-secondary); }
.recipe-langs {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 6px;
  background: var(--bg-tertiary);
  border-radius: 10px;
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 700;
}

.refactor-extra {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}
.refactor-extra label { font-size: 12px; color: var(--text-muted); font-weight: 600; }
.refactor-extra input, .refactor-extra textarea {
  width: 100%;
  padding: 6px 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 13px;
  font-family: inherit;
  box-sizing: border-box;
}
.refactor-extra textarea { min-height: 60px; resize: vertical; }

.refactor-actions { display: flex; gap: 6px; align-items: center; margin-top: 4px; }
.refactor-status {
  margin-top: 10px;
  padding: 8px 10px;
  font-size: 12px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  white-space: pre-wrap;
}
.refactor-status.error { border-color: var(--danger); color: var(--danger); background: rgba(220,38,38,0.08); }
.refactor-status.success { border-color: var(--success); color: var(--success); background: rgba(16,185,129,0.08); }

.selection-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  background: var(--bg-tertiary);
  border-radius: 10px;
  font-size: 11px;
  color: var(--text-muted);
  font-family: 'Cascadia Code', 'Fira Code', Consolas, monospace;
}

/* ── Diff overlay ── */
.diff-overlay {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 55vh;
  background: var(--bg-primary);
  border-top: 2px solid var(--accent);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.25);
  display: flex;
  flex-direction: column;
  z-index: 50;
}
.diff-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  flex-shrink: 0;
}
.diff-header h3 { margin: 0; font-size: 14px; font-weight: 700; }
.diff-header .spacer { flex: 1; }

.diff-body { flex: 1; overflow: auto; font-family: 'Cascadia Code', 'Fira Code', Consolas, monospace; font-size: 12px; }

.diff-hunk {
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
}
.diff-hunk-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 11px;
}
.diff-hunk-head .spacer { flex: 1; }
.diff-hunk.accepted .diff-hunk-head { color: var(--success); }
.diff-hunk.rejected .diff-hunk-head { color: var(--danger); opacity: 0.65; }
.diff-hunk.rejected .diff-line { opacity: 0.5; }

.diff-line {
  display: grid;
  grid-template-columns: 20px 1fr;
  padding: 0 10px;
  white-space: pre;
  line-height: 1.5;
}
.diff-line .marker { color: var(--text-muted); user-select: none; }
.diff-line.add { background: rgba(16,185,129,0.12); }
.diff-line.add .marker { color: var(--success); }
.diff-line.del { background: rgba(220,38,38,0.12); }
.diff-line.del .marker { color: var(--danger); }

.rationale-box {
  padding: 10px 14px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-secondary);
  font-family: inherit;
  max-height: 100px;
  overflow: auto;
  white-space: pre-wrap;
}

/* ── Load gate ── */
.load-gate {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  gap: 14px;
  color: var(--text-secondary);
  text-align: center;
}
.load-gate h2 { margin: 0; color: var(--text-primary); }

/* ── Session dialog ── */
.session-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 50vh;
  overflow: auto;
  padding: 4px;
}
.session-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-secondary);
  cursor: pointer;
}
.session-row:hover { border-color: var(--accent); }
.session-row .title { font-weight: 600; }
.session-row .meta { color: var(--text-muted); font-size: 12px; }
.session-row .spacer { flex: 1; }

.btn-danger {
  background: var(--danger);
  color: #fff;
  border: 1px solid var(--danger);
}
.btn-danger:hover { filter: brightness(0.95); }

.ts-warning {
  padding: 6px 10px;
  margin-bottom: 10px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #b45309;
  border-radius: 6px;
  font-size: 12px;
}
[data-theme="dark"] .ts-warning { color: #fbbf24; }

.muted { color: var(--text-muted); font-size: 12px; }
.monospace { font-family: 'Cascadia Code', 'Fira Code', Consolas, monospace; }