.tool-page {
  max-width: 900px;
  margin: 0 auto;
}

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

.tool-header h1 {
  margin-bottom: 0.5rem;
  color: var(--main);
}

.tool-header p {
  margin: 0;
  color: var(--text-muted);
}

.tool-panel {
  padding: 1.5rem;
  border: 1px solid var(--border);
  background: var(--panel-background);
}

.regex-pattern-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.regex-pattern-row .tool-field {
  flex: 1 1 auto;
  min-width: 0;
}

.regex-flags-field {
  flex: 0 0 120px;
  min-width: 0;
}

.regex-pattern-row input {
  box-sizing: border-box;
  width: 100%;
}

.tool-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tool-field label {
  font-weight: 700;
}

.tool-field input,
.tool-field textarea,
.regex-flags-field input {
  box-sizing: border-box;
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  background: var(--page-background);
  color: var(--text);
  font: inherit;
}

.tool-field textarea {
  min-height: 200px;
  resize: vertical;
  line-height: 1.5;
}

.tool-field input:focus,
.tool-field textarea:focus {
  outline: none;
  border-color: var(--main);
}

.tool-field input::placeholder,
.tool-field textarea::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.regex-status-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 1.5rem;
  padding: 1rem 1.5rem;
  border: 1px solid var(--border);
  background: var(--panel-background);
}

.regex-status,
.regex-match-count {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.regex-status-label {
  color: var(--text-muted-dark);
  font-weight: 700;
}

#regex-status {
  color: var(--success);
  font-weight: 700;
}

#regex-match-count {
  color: var(--main);
  font-weight: 700;
}

.regex-results {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.regex-result {
  padding: 1rem;
  border: 1px solid var(--border);
  background: var(--panel-background);
}

.regex-result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.regex-result-header h2 {
  margin: 0;
  font-size: 1rem;
}

.regex-copy {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
}

.regex-matches {
  display: grid;
  gap: 0.5rem;
}

.regex-match {
  padding: 0.75rem;
  border: 1px solid var(--border);
  background: var(--page-background);
  font-family: monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.regex-match-number {
  display: inline-block;
  min-width: 2rem;
  margin-right: 0.75rem;
  color: var(--text-muted);
}

.regex-empty {
  margin: 0;
  color: var(--text-muted-dark);
}

.regex-highlight {
  min-height: 100px;
  padding: 1rem;
  border: 1px solid var(--border);
  background: var(--panel-background);
  color: var(--text);
  font-family: monospace;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.regex-highlight mark {
  padding: 0.1rem 0.15rem;
  background: var(--main);
  color: var(--page-background);
}

.tool-error {
  margin-top: 1rem;
  padding: 1rem;
  border-left: 4px solid var(--error);
  background: var(--panel-background);
  color: var(--error);
}

@media (max-width: 600px) {
  .regex-pattern-row {
    grid-template-columns: 1fr;
  }
}