/* IPv6 tool — extends AS215899 theme */
.tool-wrap {
  max-width: 1100px;
}

.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-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;
  }
}