main { max-width: 1200px; margin: 0 auto; padding: 28px 32px 72px; display: flex; flex-direction: column; gap: 24px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 22px; }
.panel h2 {
  font-size: 12.5px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--muted); font-weight: 700; margin: 0 0 14px;
}
.card-description { font-size: 13px; color: var(--muted); margin: -4px 0 16px; line-height: 1.55; }

.io-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 900px) { .io-row { grid-template-columns: 1fr; } }

.file-row { margin-bottom: 10px; }
.file-row input[type="file"] { font-size: 12px; }

textarea {
  width: 100%; height: 260px;
  font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 12.5px; line-height: 1.5;
  border: 1px solid var(--line); border-radius: 6px; padding: 12px;
  background: #fbfbfc; box-sizing: border-box; resize: vertical;
}

.toolbar { display: flex; gap: 8px; margin-top: 10px; }
.toolbar button, #copyBtn, #downloadBtn {
  padding: 9px 14px; font-size: 13px; border: 1px solid var(--line);
  background: #fff; border-radius: 6px; cursor: pointer;
}
.toolbar button:hover, #copyBtn:hover, #downloadBtn:hover { background: #f4f5f7; }
button.primary {
  padding: 9px 16px; border: 1px solid var(--primary) !important;
  background: var(--primary) !important; color: #fff; font-weight: 600;
}
button.primary:hover { background: var(--primary-hover) !important; }

.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 13px; margin-bottom: 10px; }

.log { font-size: 12.5px; color: var(--muted); margin-top: 10px; white-space: pre-wrap; }
.log.log-error { color: #b42318; }

/* ---------- tree ---------- */
.tree-container { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 13px; }
.node-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 0;
}
.node-children {
  margin-left: 22px;
  border-left: 1px dashed var(--line);
  padding-left: 12px;
}
.toggle-btn {
  border: none; background: none; cursor: pointer; color: var(--muted);
  font-size: 11px; width: 16px; padding: 0; flex-shrink: 0;
}
.key-input {
  font-family: inherit; font-size: 13px; font-weight: 600; color: var(--ink);
  border: 1px solid transparent; border-radius: 4px; padding: 2px 4px; width: 140px;
  background: transparent;
}
.key-input:hover, .key-input:focus { border-color: var(--line); background: #fff; }
.colon { color: var(--muted); }
.node-summary { color: var(--muted); font-size: 12px; }
.type-select {
  font-family: inherit; font-size: 11.5px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 4px; padding: 1px 2px; background: #fff;
}
.value-wrap { flex: 1; }
.value-input {
  font-family: inherit; font-size: 13px; border: 1px solid transparent;
  border-radius: 4px; padding: 2px 6px; width: 100%; max-width: 360px; box-sizing: border-box;
  background: transparent;
}
.value-input:hover, .value-input:focus { border-color: var(--line); background: #fff; }
.null-label { color: var(--muted); font-style: italic; }
.node-delete {
  border: none; background: none; color: var(--muted); cursor: pointer;
  font-size: 11px; padding: 0 4px; flex-shrink: 0;
}
.node-delete:hover { color: #ef376e; }
.add-btn {
  display: inline-block; margin: 4px 0 8px;
  font-size: 12px; color: var(--primary); background: none; border: none; cursor: pointer; padding: 0;
}
.add-btn:hover { text-decoration: underline; }

/* ---------- XML-specific node parts ---------- */
.tag-bracket { color: var(--muted); }
.tag-input {
  font-family: inherit; font-size: 13px; font-weight: 600; color: var(--ink);
  border: 1px solid transparent; border-radius: 4px; padding: 2px 4px; width: 100px;
  background: transparent;
}
.tag-input:hover, .tag-input:focus { border-color: var(--line); background: #fff; }
.attr-wrap { display: inline-flex; gap: 4px; margin: 0 4px; flex-wrap: wrap; }
.attr-pill {
  display: inline-flex; align-items: center; gap: 2px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 4px; padding: 1px 4px;
}
.attr-name, .attr-value {
  font-family: inherit; font-size: 11.5px; border: none; background: transparent; padding: 1px 2px; width: 70px;
}
.attr-name { color: var(--muted); font-weight: 600; }
.add-attr-btn {
  font-size: 11px; color: var(--primary); background: none; border: 1px dashed var(--line);
  border-radius: 4px; padding: 1px 6px; cursor: pointer;
}
.add-attr-btn:hover { border-color: var(--primary); }
.text-input {
  font-family: inherit; font-size: 13px; color: var(--ink); font-style: italic;
  border: 1px solid transparent; border-radius: 4px; padding: 2px 6px; flex: 1; max-width: 300px;
  background: transparent;
}
.text-input:hover, .text-input:focus { border-color: var(--line); background: #fff; font-style: normal; }