.version-badge {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  margin-left: auto;
  padding: 6px 10px;
  border: 1px solid rgba(147, 197, 253, 0.36);
  border-radius: 999px;
  background: rgba(24, 119, 242, 0.16);
  color: var(--accent);
  font: 700 12px/1 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  white-space: nowrap;
}

.version-badge[data-runtime-ready="true"]::after {
  content: "";
  width: 6px;
  height: 6px;
  margin-left: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.12);
}

.result-preview {
  margin-bottom: 12px;
}

.preview-toggle {
  width: 100%;
  min-height: 42px;
  min-width: 0;
  padding: 10px 12px;
  border-color: var(--line);
  background: rgba(148, 163, 184, 0.10);
  color: var(--text);
  font-size: 13px;
}

.preview-toggle:not(:disabled):hover {
  background: rgba(148, 163, 184, 0.18);
}

.preview-toggle::after {
  content: "⌄";
  display: inline-block;
  margin-left: 8px;
  transition: transform 160ms ease;
}

.preview-toggle[aria-expanded="true"]::after,
.preview-toggle[data-expanded="true"]::after {
  transform: rotate(180deg);
}

.result-preview-body {
  margin-top: 12px;
}

.result-preview-body[hidden] {
  display: none !important;
}

.result-preview-body textarea {
  margin: 0;
}

.update-notice[data-state="new"] {
  border-color: rgba(96, 165, 250, 0.48);
  background: rgba(37, 120, 242, 0.12);
  color: var(--accent);
}

.update-notice[data-state="updated"] {
  border-color: rgba(251, 191, 36, 0.52);
  background: rgba(251, 191, 36, 0.12);
  color: var(--warning);
}

.update-notice[data-state="copied"] {
  border-color: rgba(52, 211, 153, 0.48);
  background: rgba(52, 211, 153, 0.12);
  color: var(--success);
}

#copyBtn {
  transition: transform 140ms ease, filter 140ms ease, opacity 140ms ease, background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

#copyBtn[data-copy-state="new"],
#copyBtn.copy-state-new {
  background: var(--accent-strong);
  border-color: rgba(147, 197, 253, 0.42);
  color: #fff;
  box-shadow: 0 8px 24px rgba(37, 120, 242, 0.24);
}

#copyBtn[data-copy-state="valid"],
#copyBtn.copy-state-valid {
  background: #16865d;
  border-color: rgba(110, 231, 183, 0.46);
  color: #fff;
  box-shadow: 0 8px 24px rgba(22, 134, 93, 0.24);
}

#copyBtn[data-copy-state="updated"],
#copyBtn.copy-state-updated {
  background: #d97706;
  border-color: rgba(253, 230, 138, 0.52);
  color: #fff;
  box-shadow: 0 8px 24px rgba(217, 119, 6, 0.28);
  animation: copy-state-pulse 700ms ease-out;
}

#copyBtn[data-copy-state="empty"],
#copyBtn.copy-state-empty {
  background: rgba(148, 163, 184, 0.16);
  border-color: var(--line);
  color: var(--muted);
  box-shadow: none;
}

@keyframes copy-state-pulse {
  0% { transform: scale(0.985); }
  45% { transform: scale(1.015); }
  100% { transform: scale(1); }
}

@media (max-width: 430px) {
  .top-nav { align-items: flex-start; flex-wrap: wrap; }
  .version-badge { margin-left: auto; }

  .version-badge {
    max-width: 170px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

@media (prefers-reduced-motion: reduce) {
  #copyBtn[data-copy-state="updated"],
  #copyBtn.copy-state-updated {
    animation: none;
  }
}