.container-regex-tester {
  font-family: "Segoe UI", sans-serif;
  background: #f9f9fb;
  color: #333;
}
.container-regex-tester .container {
  max-width: 1200px;
  margin: auto;
}
.container-regex-tester .card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.08);
  padding: 24px;
  margin-bottom: 20px;
}
.container-regex-tester .card h1 {
  font-size: 1.8rem;
  margin-bottom: 10px;
}
.container-regex-tester .subtitle {
  color: #666;
  font-size: 0.95rem;
  margin-bottom: 16px;
}
.container-regex-tester .form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.container-regex-tester label {
  display: block;
  margin: 10px 0 5px;
  font-weight: 500;
}
.container-regex-tester input, .container-regex-tester textarea, .container-regex-tester select {
  width: 100%;
  padding: 10px;
  font-size: 0.95rem;
  border-radius: 5px;
  border: 1px solid #ccc;
  box-sizing: border-box;
}
.container-regex-tester textarea {
  font-family: monospace;
}
.container-regex-tester .checkboxes {
  margin-top: 10px;
}
.container-regex-tester .checkboxes label {
  margin-right: 10px;
}
.container-regex-tester .button-group {
  margin-top: 20px;
}
.container-regex-tester button {
  background-color: #de9406;
  color: white;
  padding: 10px 20px;
  margin-right: 10px;
  border: none;
  font-weight: bold;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s ease;
}
.container-regex-tester button:hover {
  background-color: #b97b07;
}
.container-regex-tester .msg-box {
  margin-top: 10px;
  font-size: 0.9rem;
  padding: 8px 12px;
  border-radius: 5px;
  display: none;
}
.container-regex-tester .msg-box.success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}
.container-regex-tester .msg-box.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}
.container-regex-tester .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.container-regex-tester .code-box {
  width: 100%;
  font-family: monospace;
  border-radius: 6px;
  border: 1px solid #ccc;
  padding: 10px;
  box-sizing: border-box;
}
.container-regex-tester .highlight-box {
  white-space: pre-wrap;
  font-family: monospace;
  padding: 10px;
  border-radius: 5px;
  background: #f1f1f1;
  margin-bottom: 10px;
}
.container-regex-tester .highlight {
  background-color: yellow;
  font-weight: bold;
}
.container-regex-tester .checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-top: 10px;
}
.container-regex-tester .checkboxes label {
  display: flex;
  align-items: center;
  font-size: 0.95rem;
  gap: 5px;
}
.container-regex-tester .tool-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 6px;
  color: #1a1a1a;
  text-align: center;
}
.container-regex-tester .subtitle {
  font-size: 15px;
  color: #555;
  margin-bottom: 20px;
  text-align: center;
}
.container-regex-tester .flag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 10px 0 20px;
}
.container-regex-tester .flag-row label {
  display: flex;
  align-items: center;
  font-size: 14px;
  gap: 6px;
  cursor: pointer;
}
.container-regex-tester .flag-row input[type=checkbox] {
  transform: scale(1.2);
  accent-color: #de9406;
}