.utm-form { padding: 16px 16px 0; }
.utm-top { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 12px; }
.utm-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 12px; }
.utm-f { margin-bottom: 12px; min-width: 0; }
.utm-f label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 4px; }
.utm-f label code { font-size: 12px; color: var(--muted); font-weight: 400; margin-left: 4px; }
.utm-f .req { color: var(--danger); }
.utm-f input, .utm-f select { width: 100%; min-width: 0; height: 42px; padding: 0 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--ink); font: inherit; font-size: 15px; }
.utm-f input:focus, .utm-f select:focus { outline: none; border-color: var(--blue); box-shadow: var(--focus); }
.utm-f input.missing { border-color: var(--warn); background: var(--warn-tint); }
.utm-opts { margin: 0 -16px; }
.utm-out { border-top: 1px solid var(--border); padding: 16px; }
.utm-result.io { min-height: 76px; height: 76px; font-size: 14px; }
.utm-notes { list-style: none; margin: 8px 0 0; padding: 0; font-size: 13px; }
.utm-notes li { padding: 6px 10px; border-radius: 8px; margin-bottom: 4px; background: var(--blue-tint); }
.utm-notes li.warn { background: var(--warn-tint); color: var(--warn); }
.utm-out .notice { margin: 8px 0 0; }
.utm-params { margin-top: 8px; }
.utm-params summary { cursor: pointer; color: var(--blue); }
.utm-ref { border-top: 1px solid var(--border); padding: 14px 16px; }
.utm-ref h3 { font-size: 16px; margin: 0 0 4px; }
.utm-chips { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 6px 12px; }
.utm-chip { display: flex; gap: 8px; align-items: baseline; font-size: 13px; }
.utm-chip button { border: 1px solid var(--border); background: var(--canvas); color: var(--blue); border-radius: 8px; padding: 3px 8px; font-family: var(--mono); font-size: 12.5px; cursor: pointer; white-space: nowrap; min-height: 30px; }
.utm-chip button:hover { background: var(--blue-tint); }
.utm-chip span { color: var(--muted); }
a.btn[aria-disabled="true"] { opacity: .45; pointer-events: none; }
@media (max-width: 900px) { .utm-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 768px) {
  .utm-form { padding: 12px 12px 0; }
  .utm-top, .utm-grid { grid-template-columns: minmax(0, 1fr); }
  .utm-opts { margin: 0 -12px; }
  .utm-out { position: sticky; bottom: 0; z-index: 5; background: var(--surface); padding: 12px; box-shadow: 0 -4px 12px rgba(23, 32, 51, .06); }
  .utm-result.io { min-height: 64px; height: 64px; }
  .utm-chip button { min-height: 40px; }
}
@media (max-width: 900px) { #tool > .utm-form { order: 1; } #tool > .utm-out { order: 2; } #tool > .utm-ref { order: 3; } }