/* IPv6 tool — extends AS215899 theme */
.tool-wrap {
  max-width: 1180px;
}

.tool-sub {
  color: var(--text-muted);
  margin-top: -0.4rem;
  margin-bottom: 1.2rem;
}

.tool-explain {
  display: grid;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
  padding: 1rem 1.1rem;
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}

@media (min-width: 800px) {
  .tool-explain {
    grid-template-columns: 1fr 1fr;
  }
}

.tool-explain h4 {
  margin: 0 0 0.35rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-family: var(--font-sans);
  border: none;
  padding: 0;
}

.tool-explain p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.tool-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.tool-tabs a {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.5rem 0.9rem;
  border-radius: 4px;
  border: 1px solid var(--card-border);
  background: var(--bg);
}

.tool-tabs a:hover,
.tool-tabs a.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: var(--accent);
  text-decoration: none;
}

.tool-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 900px) {
  .tool-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.tool-card {
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
}

.tool-card h3 {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  border-bottom: none;
  padding: 0;
}

.tool-card label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
  font-family: var(--font-sans);
}

.tool-card input[type="text"],
.tool-card input[type="number"],
.tool-card select,
.tool-card textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: 4px;
  border: 1px solid var(--card-border);
  background: #2d2d2d;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  margin-bottom: 0.85rem;
}

.tool-card textarea {
  min-height: 160px;
  resize: vertical;
  line-height: 1.45;
}

.tool-card input:focus,
.tool-card select:focus,
.tool-card textarea:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

.tool-card button,
.tool-pager a.primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  background: var(--accent);
  color: #04140c;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
}

.tool-card button:hover,
.tool-pager a.primary:hover {
  background: var(--accent-hover);
  text-decoration: none;
  color: #04140c;
}

.tool-btn-sec {
  display: inline-block;
  margin: 0.25rem;
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  background: var(--card);
  border: 1px solid var(--card-border);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
}

.tool-btn-sec:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

.tool-row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.tool-row3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.75rem;
}

.tool-modes {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tool-mode {
  flex: 1;
  display: flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.7rem;
  margin: 0;
  border: 1px solid var(--card-border);
  border-radius: 4px;
  cursor: pointer;
  background: #2d2d2d;
  color: var(--text);
}

.tool-mode input {
  accent-color: var(--accent);
  margin: 0;
}

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

.tool-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.tool-stat {
  background: #2d2d2d;
  border: 1px solid var(--card-border);
  border-radius: 4px;
  padding: 0.7rem;
}

.tool-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  word-break: break-all;
}

.tool-stat span {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-sans);
}

.tool-err,
.tool-ok,
.tool-warn {
  padding: 0.75rem 1rem;
  border-radius: 4px;
  margin: 1rem 0;
  font-size: 0.88rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.tool-err {
  background: rgba(231, 76, 60, 0.15);
  border: 1px solid #e74c3c;
  color: #ffd4cf;
}

.tool-ok {
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.tool-warn {
  background: rgba(240, 173, 78, 0.15);
  border: 1px solid #f0ad4e;
  color: #ffe6b0;
}

.tool-hint {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.55;
}

.tool-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.7rem;
}

.tool-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.22rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  background: #2d2d2d;
}

.tool-tip {
  position: relative;
  display: inline-block;
  cursor: help;
  border-bottom: 1px dotted var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.tool-tip::after {
  content: attr(data-tip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 8px);
  transform: translateX(-50%);
  width: min(280px, 70vw);
  padding: 0.65rem 0.75rem;
  border-radius: 4px;
  background: var(--bg-nav);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.4;
  white-space: normal;
  text-align: left;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
  z-index: 50;
}

.tool-tip:hover::after,
.tool-tip:focus::after {
  opacity: 1;
}

.tool-priv-h {
  margin: 1.25rem 0 0.75rem;
  font-size: 0.85rem;
  color: var(--accent);
  border-bottom: none;
  padding: 0;
}

.tool-private {
  overflow: visible;
}

.tool-priv-cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .tool-priv-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tool-priv-card {
  background: #2d2d2d;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
}

.tool-priv-card__prefix {
  margin-bottom: 0.35rem;
}

.tool-priv-card__prefix code {
  font-size: 1rem;
  color: var(--accent);
  background: transparent;
  padding: 0;
  word-break: keep-all;
  white-space: nowrap;
}

.tool-priv-card__use {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

.tool-priv-card__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1rem;
  margin: 0;
}

.tool-priv-card__meta dt {
  margin: 0;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.tool-priv-card__meta dd {
  margin: 0.15rem 0 0;
  font-size: 0.88rem;
  color: var(--text);
}

.tool-priv-card__meta code {
  background: transparent;
  padding: 0;
  color: var(--accent);
  word-break: keep-all;
  white-space: nowrap;
  font-size: 0.85rem;
}

.tool-table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tool-table-wide {
  min-width: 920px;
  border-collapse: separate;
  border-spacing: 0;
}

.tool-table-wide th,
.tool-table-wide td {
  padding: 0.85rem 1rem;
  vertical-align: middle;
  white-space: nowrap;
}

.tool-table-wide th:last-child,
.tool-table-wide td:last-child {
  white-space: normal;
  min-width: 180px;
}

.tool-table-wide code.nowrap,
.nowrap {
  white-space: nowrap;
  word-break: keep-all;
}

.tool-table-wide code {
  word-break: keep-all;
  white-space: nowrap;
}

.tool-pager {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.tool-pager a {
  color: var(--text);
  text-decoration: none;
  padding: 0.5rem 0.85rem;
  border-radius: 4px;
  background: #2d2d2d;
  border: 1px solid var(--card-border);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
}

.tool-pager a:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

.tool-card code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  background: #2d2d2d;
  padding: 0.12rem 0.3rem;
  border-radius: 4px;
  word-break: break-all;
}

@media (max-width: 700px) {
  .tool-row2,
  .tool-row3,
  .tool-modes {
    grid-template-columns: 1fr;
    flex-direction: column;
  }
}

/* Interactive splitter / joiner */
.split-form .tool-row3 {
  align-items: end;
}

.split-form-actions label {
  visibility: hidden;
}

.split-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.split-actions-row button {
  margin: 0;
}

.split-actions-row .tool-btn-sec {
  cursor: pointer;
  font-family: var(--font-sans);
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--card-border);
}

.tool-card button.tool-btn-sec:hover {
  background: #2d2d2d;
  color: var(--accent);
  border-color: var(--accent);
}

.split-cols {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1rem;
  align-items: center;
  margin: 0.25rem 0 1rem;
  padding: 0.75rem 0.9rem;
  background: #2d2d2d;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}

.split-cols__label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.split-col-check {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  cursor: pointer;
  margin: 0;
  font-family: var(--font-sans);
}

.split-col-check input {
  width: auto;
  margin: 0;
  accent-color: var(--accent);
}

.split-stats {
  margin-bottom: 1rem;
}

.split-table td,
.split-table th {
  white-space: nowrap;
}

.split-table .col-range,
.split-table .col-useable {
  white-space: nowrap;
}

.split-addr {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.split-tree-btn {
  width: 1.4rem;
  height: 1.4rem;
  padding: 0;
  border-radius: 3px;
  border: 1px solid var(--card-border);
  background: #222;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
}

.split-tree-btn:hover {
  border-color: var(--accent);
}

.split-tree-dot {
  width: 1.4rem;
  text-align: center;
  color: var(--text-muted);
  flex-shrink: 0;
}

.split-btn {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.35rem 0.65rem;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  margin: 0;
}

.split-btn--divide {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.split-btn--divide:hover {
  background: var(--accent);
  color: #04140c;
}

.split-btn--join {
  background: #2d2d2d;
  color: var(--text);
  border-color: var(--card-border);
}

.split-btn--join:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.split-muted {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.split-level-1 { background: rgba(255,255,255,0.015); }
.split-level-2 { background: rgba(255,255,255,0.03); }
.split-level-3 { background: rgba(255,255,255,0.045); }
.split-level-4,
.split-level-5 { background: rgba(255,255,255,0.06); }

/* Full CIDR / mask reference table */
.mask-ref-table tr.is-active td {
  background: var(--accent-dim);
  box-shadow: inset 2px 0 0 var(--accent);
}

.mask-ref-table tr.is-active code {
  color: var(--accent);
}

.mask-ref-table a {
  text-decoration: none;
}

.mask-ref-table a:hover code {
  text-decoration: underline;
}

.mask-ref-table .mask-bin code {
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
  color: var(--text-muted);
}

.subnet-peers-table tr.is-active td {
  background: var(--accent-dim);
  box-shadow: inset 2px 0 0 var(--accent);
}

.subnet-peers-table tr.is-active code {
  color: var(--accent);
}

.tool-notice {
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  background: #2d2d2d;
  font-size: 0.86rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.tool-notice--info {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--text);
}

.tool-notice strong {
  display: inline-block;
  margin-bottom: 0.25rem;
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tool-notice p {
  margin: 0;
}

.split-rfc-badge {
  margin-left: 0.35rem;
  font-size: 0.68rem;
  vertical-align: middle;
}

.split-rfc-badge--muted {
  color: var(--text-muted);
  border-bottom: none;
  cursor: help;
  font-family: var(--font-mono);
}

.split-row--rfc31 td {
  background: rgba(106, 176, 76, 0.06);
}

#split-rfc-notice {
  margin: 0 0 1rem;
}