p.uid-subtitle {
  text-align: center;
}

.uid-result-label {
  text-align: center;
}

div#uidResultValue {
  text-align: center;
}

.uid-finder-wrapper *,
.uid-finder-wrapper *::before,
.uid-finder-wrapper *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.uid-finder-wrapper {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #000;
  line-height: 1.5;
  font-feature-settings: 'cv11', 'ss01';
  -webkit-font-smoothing: antialiased;
  background: #f8f9fa;
  padding: 1.5rem 1rem 2.5rem;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: auto;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --uid-primary: #2563eb;
  --uid-primary-hover: #1d4ed8;
  --uid-success: #10b981;
  --uid-error: #ef4444;
  --uid-bg: #f8f9fa;
  --uid-surface: #ffffff;
  --uid-text: #1f2937;
  --uid-text-light: #6b7280;
  --uid-text-lighter: #9ca3af;
  --uid-border: #e5e7eb;
  --uid-border-focus: #3b82f6;
  --uid-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --uid-shadow-hover: 0 4px 6px rgba(0, 0, 0, 0.1);
  --uid-radius: 8px;
  --uid-transition: cubic-bezier(0.4, 0, 0.2, 1);
}

.uid-container {
  width: 100%;
  max-width: 600px;
  margin: 1rem auto;
  background: var(--uid-surface);
  border-radius: var(--uid-radius);
  border: 1px solid var(--uid-border);
  box-shadow: var(--uid-shadow);
  overflow: hidden;
  position: relative;
  transition: all 0.2s var(--uid-transition);
}

.uid-container:hover {
  box-shadow: var(--uid-shadow-hover);
}

.uid-header {
  padding: 1.5rem 2rem 1rem;
  text-align: center;
  position: relative;
}

.uid-logo {
  width: 56px;
  height: 56px;
  background: var(--uid-primary);
  border-radius: var(--uid-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  position: relative;
  transition: all 0.3s var(--uid-transition);
}

.uid-logo:hover {
  transform: scale(1.05);
}

.uid-logo::after {
  content: 'UID';
  color: white;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
}

.uid-container h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--uid-text);
  margin-bottom: 0.4rem;
  letter-spacing: -0.025em;
  padding: 0;
  border: none;
}

.uid-subtitle {
  color: var(--uid-text-light);
  font-size: 1rem;
  font-weight: 400;
}

.uid-form {
  padding: 0 2rem 1.5rem;
}

.uid-input-group {
  margin-bottom: 1.2rem;
  position: relative;
}

.uid-textarea {
  width: 100%;
  min-height: 100px;
  max-height: 250px;
  padding: 0.875rem;
  border: 2px solid var(--uid-border);
  border-radius: var(--uid-radius);
  background: var(--uid-surface);
  color: var(--uid-text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all 0.2s var(--uid-transition);
  outline: none;
  resize: vertical;
  line-height: 1.4;
}

.uid-textarea::placeholder {
  color: var(--uid-text-lighter);
  font-weight: 400;
}

.uid-textarea:focus {
  border-color: var(--uid-border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.uid-textarea:invalid:not(:placeholder-shown) {
  border-color: var(--uid-error);
}

.url-counter {
  position: absolute;
  bottom: 8px;
  right: 12px;
  font-size: 0.75rem;
  color: var(--uid-text-lighter);
  background: var(--uid-surface);
  padding: 2px 6px;
  border-radius: 4px;
}

.url-counter.warning {
  color: var(--uid-error);
}

.math-verification {
  background: #f8fafc;
  border: 2px solid var(--uid-border);
  border-radius: var(--uid-radius);
  padding: 1.2rem;
  margin-bottom: 1.2rem;
  text-align: center;
}

.math-question {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--uid-text);
  margin-bottom: 0.8rem;
}

.math-input {
  width: 120px;
  height: 48px;
  padding: 0 1rem;
  border: 2px solid var(--uid-border);
  border-radius: var(--uid-radius);
  background: var(--uid-surface);
  color: var(--uid-text);
  font-size: 1.25rem;
  font-weight: 600;
  text-align: center;
  transition: all 0.2s var(--uid-transition);
  outline: none;
}

.math-input:focus {
  border-color: var(--uid-border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.math-input:invalid:not(:placeholder-shown) {
  border-color: var(--uid-error);
}

.uid-btn {
  width: 100%;
  height: 48px;
  background: var(--uid-primary);
  color: white;
  border: none;
  border-radius: var(--uid-radius);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  position: relative;
  transition: all 0.2s var(--uid-transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.uid-btn:hover:not(:disabled) {
  background: var(--uid-primary-hover);
  transform: translateY(-1px);
}

.uid-btn:active:not(:disabled) {
  transform: translateY(0);
}

.uid-btn:disabled {
  background: var(--uid-text-lighter);
  color: white;
  cursor: not-allowed;
  transform: none;
}

.uid-progress {
  display: none;
  margin-top: 0.8rem;
  text-align: center;
}

.uid-progress-bar {
  width: 100%;
  height: 6px;
  background: var(--uid-border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.4rem;
}

.uid-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--uid-primary), #60a5fa, var(--uid-primary));
  background-size: 200% 100%;
  transition: width 0.3s ease;
  border-radius: 4px;
  animation: progress-shimmer 2s infinite;
}

@keyframes progress-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes progress-pulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.7; transform: scaleY(0.8); }
}

.uid-progress-fill.indeterminate {
  width: 100% !important;
  animation: uid-indeterminate 1.2s infinite;
}

@keyframes uid-indeterminate {
  0% { background-position: -200% 0; }
  50% { background-position: 0 0; }
  100% { background-position: 200% 0; }
}

.uid-progress-text {
  font-size: 0.875rem;
  color: var(--uid-text-light);
  font-weight: 500;
}

.uid-results {
  display: none;
  margin-top: 1.2rem;
}

.uid-result-item {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--uid-radius);
  padding: 0.875rem;
  margin-bottom: 0.875rem;
  animation: uid-slideUp 0.3s var(--uid-transition);
}

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

.uid-result-item.error {
  background: #fef2f2;
  border-color: #fecaca;
}

.uid-result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}

.uid-result-url {
  font-size: 0.875rem;
  color: var(--uid-text-light);
  font-weight: 500;
  word-break: break-all;
  flex: 1;
  margin-right: 1rem;
}

.uid-result-status {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.uid-result-status.success {
  background: var(--uid-success);
  color: white;
}

.uid-result-status.error {
  background: var(--uid-error);
  color: white;
}

.uid-result-content {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.uid-result-value {
  flex: 1;
  padding: 0.625rem;
  background: white;
  border: 1px solid #d1fae5;
  border-radius: 6px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--uid-text);
  word-break: break-all;
}

.uid-result-error {
  flex: 1;
  padding: 0.75rem;
  background: white;
  border: 1px solid #fecaca;
  border-radius: 6px;
  font-size: 0.875rem;
  color: var(--uid-error);
  word-break: break-all;
}

.uid-copy-btn {
  height: 36px;
  background: var(--uid-success);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--uid-transition);
  padding: 0 0.875rem;
  white-space: nowrap;
}

.uid-copy-btn:hover {
  background: #059669;
}

.uid-clear-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--uid-error);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--uid-transition);
  padding: 0.5rem 1rem;
}

.uid-clear-btn:hover {
  background: #dc2626;
}

.uid-copy-all-btn {
  margin-top: 0.875rem;
  width: 100%;
  height: 40px;
  background: var(--uid-primary);
  color: white;
  border: none;
  border-radius: var(--uid-radius);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--uid-transition);
  display: none;
}

.uid-copy-all-btn:hover {
  background: var(--uid-primary-hover);
}

.uid-download-excel-btn {
  margin-top: 0.5rem;
  width: 100%;
  height: 40px;
  background: #059669;
  color: white;
  border: none;
  border-radius: var(--uid-radius);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--uid-transition);
  display: none;
}

.uid-download-excel-btn:hover {
  background: #047857;
}

.uid-error {
  display: none;
  margin-top: 1.2rem;
  padding: 1rem;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--uid-radius);
  color: var(--uid-error);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  animation: uid-shake 0.5s var(--uid-transition);
}

@keyframes uid-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

@keyframes uid-slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 640px) {
  .uid-finder-wrapper { padding: 1rem; }
  .uid-header { padding: 1.5rem 1.5rem 0.8rem; }
  .uid-form { padding: 0 1.5rem 1.5rem; }
  .uid-container h1 { font-size: 1.4rem; }
  .uid-textarea { min-height: 90px; }
  .math-question { font-size: 1rem; }
  .uid-result-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .uid-result-content { flex-direction: column; }
  .uid-copy-btn { width: 100%; }
}

.uid-container {
  will-change: transform;
  transform: translateZ(0);
}

.uid-btn,
.uid-copy-btn {
  will-change: transform;
  transform: translateZ(0);
}

.uid-textarea:focus-visible,
.uid-math-input:focus-visible,
.uid-btn:focus-visible,
.uid-copy-btn:focus-visible {
  outline: 2px solid var(--uid-border-focus);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .uid-container,
  .uid-btn,
  .uid-copy-btn {
    transition: none;
  }
}