.tool-wrap { max-width: 960px; margin: 0 auto; padding: 32px 20px 80px; }
.tool-panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
}
.tool-panel > h2, .tool-panel > label {
  display: block; font-size: 12px; font-weight: 600; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: 12px;
}
.tool-textarea {
  width: 100%; min-height: 120px; padding: 12px 14px; font-family: var(--mono);
  font-size: 14px; background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); resize: vertical;
  outline: none; transition: border-color .15s, box-shadow .15s; line-height: 1.6;
}
.tool-textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(106,169,255,.12); }
.tool-textarea::placeholder { color: #4a5163; }
.tool-hint { margin-top: 8px; font-size: 12px; color: var(--muted-2); line-height: 1.6; }
.tool-hint code {
  background: var(--bg-alt); padding: 1px 6px; border-radius: 4px; font-size: 11px;
  color: var(--text-dim); font-family: var(--mono); border: 1px solid var(--border);
}
.tool-actions { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.tool-btn {
  padding: 10px 20px; font-size: 14px; font-weight: 500; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
  cursor: pointer; transition: all .15s; font-family: inherit;
}
.tool-btn:hover { background: #1e2330; border-color: var(--border-hi); }
.tool-btn:active { transform: translateY(1px); }
.tool-btn.primary { background: var(--accent-hi); border-color: var(--accent-hi); color: #fff; }
.tool-btn.primary:hover { background: var(--accent); border-color: var(--accent); }
.tool-error {
  padding: 12px 16px; background: #2a1515; border: 1px solid #5a2424;
  border-radius: var(--radius-sm); color: var(--err); font-size: 13px; margin-bottom: 16px;
}
.tool-field { margin-bottom: 18px; }
.tool-field:last-child { margin-bottom: 0; }
.tool-field > label {
  display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px;
  font-weight: 500; text-transform: uppercase; letter-spacing: .06em;
}
.tool-output {
  padding: 12px 14px; background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-size: 14px; word-break: break-word;
  white-space: pre-wrap; min-height: 42px;
}
.tool-output.mono {
  font-family: var(--mono); font-size: 12px; letter-spacing: .04em;
  word-break: break-all; white-space: pre-wrap; line-height: 1.8;
}
.tool-output.bits-encoded { color: #93c5fd; font-weight: 500; }
.tool-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin-bottom: 18px; }
.tool-stat { padding: 12px 14px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.tool-stat.hi { border-color: rgba(74,222,128,.3); background: rgba(74,222,128,.05); }
.tool-stat-label { display: block; font-size: 11px; color: var(--muted-2); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 4px; }
.tool-stat-value { font-size: 18px; font-weight: 600; color: var(--accent); font-variant-numeric: tabular-nums; }
.tool-stat.hi .tool-stat-value { color: var(--ok); }
.tool-stat-sub { display: block; font-size: 11px; color: var(--muted-2); margin-top: 2px; }
.tool-table-wrap { background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
table.freq-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 12px; }
table.freq-table th {
  text-align: left; padding: 8px 14px; font-size: 11px; color: var(--muted-2);
  text-transform: uppercase; letter-spacing: .06em; font-weight: 500;
  border-bottom: 1px solid var(--border);
}
table.freq-table td { padding: 7px 14px; border-bottom: 1px solid #1a1e27; }
table.freq-table tr:last-child td { border-bottom: none; }
table.freq-table td.ch { color: #fde68a; }
table.freq-table td.num { color: var(--text); text-align: right; font-variant-numeric: tabular-nums; }
table.freq-table td.code { color: #93c5fd; letter-spacing: .1em; }
.tool-tree-container {
  overflow-x: auto; padding: 12px 0; display: flex; justify-content: center;
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.tool-tree-container svg { display: block; }
.tool-tree-legend { display: flex; gap: 18px; margin-top: 10px; font-size: 12px; color: var(--muted); }
.tool-tree-legend span { display: inline-flex; align-items: center; gap: 6px; }
.tool-tree-legend .swatch { width: 14px; height: 14px; border-radius: 4px; display: inline-block; }
.tool-tree-legend .swatch.leaf { background: #3a3320; border: 1px solid #7a6a3a; }
.tool-tree-legend .swatch.inner { background: #1e2b3f; border: 1px solid #3a5a80; }
.tool-log {
  background: #0b1015; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 14px; margin: 0; font-family: var(--mono); font-size: 13px;
  line-height: 1.55; overflow-x: auto; white-space: pre-wrap; word-break: break-word;
}
.c-code { color: #ffd866; } .c-new { color: #4ade80; } .c-out { color: #6aa9ff; }
.c-warn { color: #fca5a5; } .c-kw { color: #c792ea; } .c-muted { color: #8b93a7; }
.c-ok { color: #4ade80; font-weight: 700; } .c-err { color: #fca5a5; font-weight: 700; }
.tool-contract { font-family: var(--mono); font-size: 13px; }
.tool-contract .yes { color: #4ade80; } .tool-contract .no { color: #fca5a5; }
.tool-two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 700px) { .tool-two { grid-template-columns: 1fr; } }
.tool-io-block h3 { margin: 0 0 6px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; }
.stat { background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 14px; }
.stat .k { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
.stat .v { color: var(--accent); font-family: var(--mono); font-size: 18px; font-weight: 700; }
.stat .v.ok { color: var(--ok); }
.hidden { display: none !important; }
@media (max-width: 600px) { .tool-wrap { padding: 20px 14px 60px; } .tool-panel { padding: 16px; } }