/* Number Base Converter — tool-specific styles */
.nb-input-row { display: grid; grid-template-columns: 1fr 200px; gap: 14px; }
.nb-val input { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 1.15rem; letter-spacing: .02em; }
.nb-results { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 18px; }
.nb-card { display: flex; align-items: center; gap: 12px; background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 12px 14px; min-width: 0; }
.nb-card-wide { margin-top: 12px; }
.nb-label { flex: 0 0 96px; font-size: .76rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--muted-2); }
.nb-out { flex: 1; min-width: 0; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .98rem;
  color: var(--text); overflow-wrap: anywhere; line-height: 1.5; }
.nb-copy { flex: 0 0 auto; background: transparent; border: 1px solid var(--line); color: var(--muted);
  font: inherit; font-size: .78rem; font-weight: 600; padding: 6px 12px; border-radius: 8px; cursor: pointer;
  transition: border-color .15s, color .15s, transform .14s cubic-bezier(.23,1,.32,1); }
.nb-copy:hover { color: var(--text); border-color: var(--accent); }
.nb-copy:active { transform: scale(.95); }
.nb-copy.copied-flash { border-color: var(--good); }
.nb-custom { display: grid; grid-template-columns: 200px 1fr; gap: 14px; align-items: end; margin-top: 18px;
  padding-top: 18px; border-top: 1px solid var(--line); }
@media (max-width: 620px) {
  .nb-input-row, .nb-custom { grid-template-columns: 1fr; }
  .nb-results { grid-template-columns: 1fr; }
  .nb-custom .nb-card { margin-top: 0; }
}