.tool-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.tool-header {
  margin-bottom: 2rem;
}

.tool-label {
  margin: 0 0 0.5rem;
  color: var(--main);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.tool-header h1 {
  margin: 0 0 1rem;
  color: var(--text);
}

.tool-header p {
  max-width: 700px;
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.tool-panel {
  padding: 2rem;
  background: var(--panel-background);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.tool-field {
  margin-bottom: 1.5rem;
}

.tool-field label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text);
  font-weight: 700;
}

.tool-field input {
  box-sizing: border-box;
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface-background);
  color: var(--text-dark);
  font-family: monospace;
  font-size: 1rem;
}

.tool-field input:focus {
  outline: 2px solid var(--main);
  outline-offset: 1px;
}

.field-help {
  margin: 0.5rem 0 0;
  color: var(--text-muted-dark);
  font-size: 0.9rem;
}

.tool-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.tool-actions button {
  cursor: pointer;
}

.ipv4-status {
  margin-bottom: 1.5rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--success);
  border-radius: 4px;
  background: var(--panel-background);
  color: var(--success);
  font-weight: 700;
}

.ipv4-results {
  display: grid;
  gap: 1rem;
}

.result-item {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface-background);
}

.result-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.result-value-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.result-value-row code {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--text-dark);
  font-family: monospace;
  font-size: 1rem;
}

.copy-button {
  flex: 0 0 auto;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel-background);
  color: var(--text);
  cursor: pointer;
  font-size: 0.85rem;
}

.copy-button:hover {
  background: var(--main);
  color: var(--text-dark);
}

.tool-error {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--error);
  border-radius: 4px;
  background: var(--panel-background);
  color: var(--error);
  font-weight: 700;
}

@media (max-width: 600px) {
  .tool-page {
    padding: 2rem 1rem 4rem;
  }

  .tool-panel {
    padding: 1.25rem;
  }

  .tool-actions {
    flex-direction: column;
  }

  .tool-actions button {
    width: 100%;
  }

  .result-value-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .copy-button {
    width: 100%;
  }
}