/* NEO Regex Tester - Specific Styles */

/* =========================
   Tester Header
   ========================= */
.tester-header {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.05) 0%, 
    rgba(139, 92, 246, 0.05) 50%, 
    rgba(16, 185, 129, 0.05) 100%);
  border-bottom: 1px solid var(--color-gray-200);
}

.header-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.header-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary-700);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.header-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  .header-title {
    font-size: 3rem;
  }
}

.header-subtitle {
  font-size: 1.125rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* =========================
   Main Workspace
   ========================= */
.tester-main {
  padding: var(--space-8) 0;
  min-height: 70vh;
}

.tester-workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .tester-workspace {
    grid-template-columns: 1fr 1fr;
  }
}

/* =========================
   Input Panel
   ========================= */
.input-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.input-section {
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.input-section:hover {
  border-color: var(--color-primary-300);
  box-shadow: var(--shadow-md);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-gray-800);
}

.section-title i {
  color: var(--color-primary-600);
  font-size: 0.875rem;
}

.help-btn,
.tool-btn {
  background: none;
  border: none;
  color: var(--color-gray-400);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  font-weight: 500;
}

.help-btn:hover,
.tool-btn:hover {
  color: var(--color-primary-600);
  background: var(--color-primary-50);
}

.text-tools {
  display: flex;
  gap: var(--space-2);
}

/* =========================
   Pattern Input
   ========================= */
.pattern-input-wrapper {
  margin-bottom: var(--space-4);
}

.regex-input {
  display: flex;
  align-items: center;
  background: var(--color-gray-900);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  border: 2px solid transparent;
  transition: all var(--transition-normal);
  font-family: var(--font-mono);
}

.regex-input:focus-within {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.delimiter {
  color: var(--color-accent-400);
  font-weight: 600;
  font-size: 1.125rem;
  user-select: none;
}

.pattern-field {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--color-primary-300);
  font-family: inherit;
  font-size: 1rem;
  padding: 0 var(--space-2);
  outline: none;
}

.pattern-field::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.flags-field {
  background: transparent;
  border: none;
  color: var(--color-secondary-300);
  font-family: inherit;
  font-size: 1rem;
  width: 60px;
  text-align: center;
  outline: none;
}

.flags-field::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

/* =========================
   Flags Section
   ========================= */
.flags-section {
  border-top: 1px solid var(--color-gray-200);
  padding-top: var(--space-4);
}

.flags-checkboxes {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.flag-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: 0.875rem;
}

.flag-item input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-gray-300);
  background: white;
  cursor: pointer;
  position: relative;
}

.flag-item input[type="checkbox"]:checked {
  background: var(--color-primary-600);
  border-color: var(--color-primary-600);
}

.flag-item input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
}

.flag-label {
  font-weight: 600;
  color: var(--color-gray-800);
  font-family: var(--font-mono);
  background: var(--color-gray-100);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  min-width: 1.5rem;
  text-align: center;
}

.flag-desc {
  color: var(--color-gray-600);
}

/* =========================
   Test Text Input
   ========================= */
.text-input-wrapper {
  position: relative;
}

.test-textarea {
  width: 100%;
  background: var(--color-gray-50);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  resize: vertical;
  min-height: 200px;
  transition: all var(--transition-normal);
}

.test-textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  background: white;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.test-textarea::placeholder {
  color: var(--color-gray-400);
}

/* =========================
   Quick Patterns
   ========================= */
.quick-patterns {
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.quick-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--space-3);
}

.pattern-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.pattern-chip {
  background: white;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-3);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pattern-chip:hover {
  background: var(--color-primary-600);
  color: white;
  border-color: var(--color-primary-600);
  transform: translateY(-1px);
}

/* =========================
   Results Panel
   ========================= */
.results-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.results-section,
.details-section,
.info-section {
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.result-stats {
  display: flex;
  gap: var(--space-4);
}

.stat-item {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

/* =========================
   Highlighted Results
   ========================= */
.highlighted-text {
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  min-height: 200px;
  max-height: 400px;
  overflow-y: auto;
}

.no-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-gray-500);
  text-align: center;
  padding: var(--space-8);
}

.no-result i {
  font-size: 2rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.match-highlight {
  background: rgba(16, 185, 129, 0.2);
  color: var(--color-success-800);
  padding: 2px 4px;
  border-radius: 3px;
  font-weight: 600;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.match-index {
  background: var(--color-primary-100);
  color: var(--color-primary-800);
  font-size: 0.625rem;
  padding: 1px 4px;
  border-radius: 3px;
  margin-right: 2px;
  font-weight: 600;
}

/* =========================
   Match Details
   ========================= */
.match-details {
  min-height: 150px;
}

.no-matches {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-gray-500);
  text-align: center;
  padding: var(--space-6);
}

.no-matches i {
  font-size: 1.5rem;
  margin-bottom: var(--space-3);
  opacity: 0.5;
}

.match-item {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
  background: var(--color-gray-50);
}

.match-item:last-child {
  margin-bottom: 0;
}

.match-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.match-number {
  background: var(--color-primary-600);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.match-position {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  font-family: var(--font-mono);
}

.match-text {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-gray-800);
  background: white;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-success-500);
}

/* =========================
   Pattern Info
   ========================= */
.pattern-info {
  display: grid;
  gap: var(--space-3);
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.info-item:last-child {
  border-bottom: none;
}

.info-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
}

.info-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-gray-800);
  font-family: var(--font-mono);
}

.info-value.valid {
  color: var(--color-success-600);
}

.info-value.invalid {
  color: var(--color-error-600);
}

/* =========================
   Tools Bar
   ========================= */
.tools-bar {
  background: white;
  border-top: 1px solid var(--color-gray-200);
  padding: var(--space-4) 0;
  position: sticky;
  bottom: 0;
  z-index: var(--z-sticky);
}

.tools-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.tool-group {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.tool-btn {
  background: white;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  color: var(--color-gray-700);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.tool-btn:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-300);
  color: var(--color-primary-700);
  transform: translateY(-1px);
}

.tool-btn.primary {
  background: var(--color-primary-600);
  border-color: var(--color-primary-600);
  color: white;
}

.tool-btn.primary:hover {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
  color: white;
}

/* =========================
   Error States
   ========================= */
.error-state {
  border: 2px solid var(--color-error-300) !important;
  background: var(--color-error-50) !important;
}

.error-message {
  color: var(--color-error-600);
  font-size: 0.75rem;
  margin-top: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.error-message i {
  color: var(--color-error-500);
}

/* =========================
   Responsive Design
   ========================= */
@media (max-width: 767px) {
  .tester-header {
    padding: 6rem 0 3rem;
  }
  
  .header-title {
    font-size: 2rem;
  }
  
  .flags-checkboxes {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .tools-content {
    flex-direction: column;
    align-items: stretch;
  }
  
  .tool-group {
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .pattern-chips {
    flex-direction: column;
    align-items: stretch;
  }
  
  .pattern-chip {
    text-align: center;
    padding: var(--space-3);
  }
}

/* =========================
   Loading States
   ========================= */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(99, 102, 241, 0.2),
    transparent
  );
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* =========================
   Success States
   ========================= */
.success-state {
  border-color: var(--color-success-300) !important;
  background: var(--color-success-50) !important;
}

.success-message {
  color: var(--color-success-600);
  font-size: 0.75rem;
  margin-top: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.success-message i {
  color: var(--color-success-500);
}