.mtu-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 0.75rem;
}

.mtu-mode {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0.65rem 0.85rem;
  background: #2d2d2d;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text);
}

.mtu-mode:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}

.mtu-mode input {
  accent-color: var(--accent);
  margin: 0;
  width: auto;
}

.mtu-configure {
  color: var(--accent) !important;
  font-weight: 700;
}

.mtu-tool .tool-hint {
  margin: 0 0 0.85rem;
}

.mtu-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mtu-preset-btn {
  cursor: pointer;
  margin: 0;
}

.mtu-layers {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.mtu-layer {
  display: grid;
  grid-template-columns: 4.5rem 1fr auto;
  gap: 0.75rem;
  align-items: start;
  padding: 0.85rem 0.95rem;
  background: #2d2d2d;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}

@media (max-width: 700px) {
  .mtu-layer {
    grid-template-columns: 1fr;
  }
}

.mtu-layer__idx {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding-top: 0.35rem;
}

.mtu-layer__idx span {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: none;
  letter-spacing: 0;
}

.mtu-layer__fields {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 0.85rem;
  align-items: end;
}

.mtu-layer__fields label {
  margin: 0;
  min-width: 9rem;
}

.mtu-layer__fields select,
.mtu-layer__fields input[type="number"] {
  width: 100%;
  margin-bottom: 0;
}

.mtu-layer__oh {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 8rem;
}

.mtu-layer__oh span {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-family: var(--font-sans);
}

.mtu-layer__oh code {
  color: var(--accent);
  font-size: 0.9rem;
}

.mtu-layer__oh small {
  color: var(--text-muted);
  font-size: 0.72rem;
  line-height: 1.35;
  max-width: 16rem;
}

.mtu-layer__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.mtu-layer__actions .tool-btn-sec {
  min-width: 2rem;
  padding: 0.4rem 0.55rem;
  cursor: pointer;
}

.mtu-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0 1rem;
}

.mtu-table th,
.mtu-table td {
  text-align: left;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--card-border);
  white-space: nowrap;
}

.mtu-table tr.mtu-warn td {
  background: rgba(240, 173, 78, 0.08);
}

.mtu-table tr.mtu-bad td {
  background: rgba(231, 76, 60, 0.12);
}

.mtu-stats {
  margin-top: 0.25rem;
}

.mtu-stats .tool-stat b {
  font-size: 1.05rem;
}

.mtu-clamped {
  color: var(--muted, #9a9a9a);
  font-weight: 400;
  margin-left: 0.25rem;
}

.mtu-field-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  line-height: 1.35;
  color: var(--muted, #9a9a9a);
  font-weight: 400;
}