:root {
  --bg-light: #f5f5f5;
  --text-light: #000;
  --bg-dark: #1e1e1e;
  --text-dark: #f5f5f5;
  --box-shadow-light: 0 0 10px #ccc;
  --box-shadow-dark: 0 0 10px #000;
  --primary-color: #007bff;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --border-radius: 8px;
  --transition-speed: 0.3s;
  --min-height: 250px;
}

html {
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  max-width: 600px;
  min-height: var(--min-height);
  margin: auto;
  padding: 20px;
  background: var(--bg-light);
  color: var(--text-light);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow-light);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  transition: all var(--transition-speed);
  overflow-x: hidden;
  width: 100%;
  height: auto;
  position: relative;
}

.dark-mode {
  background: var(--bg-dark);
  color: var(--text-dark);
  box-shadow: var(--box-shadow-dark);
}

h1 {
  text-align: center;
  margin-bottom: 1rem;
}

.input-container {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin: 1rem 0;
}

input {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  border-radius: var(--border-radius);
  border: 2px solid #ccc;
  box-sizing: border-box;
  transition: border-color var(--transition-speed);
}

input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.button-group {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

button {
  padding: 8px 16px;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 0.9rem;
  transition: opacity 0.3s;
}

button:hover {
  opacity: 0.8;
}

#copy-btn {
  background-color: var(--primary-color);
  color: white;
}

#clear-btn {
  background-color: #6c757d;
  color: white;
}

#toggle-dark {
  position: absolute;
  top: 10px;
  right: 20px;
  cursor: pointer;
  font-size: 1.2rem;
  background: none;
  border: none;
  color: inherit;
  padding: 8px;
  border-radius: 50%;
  transition: background-color var(--transition-speed);
}

#toggle-dark:hover {
  background-color: rgba(127, 127, 127, 0.1);
}

.dark-mode #toggle-dark:hover {
  background-color: rgba(255,255,255,0.1);
}

#result {
  margin-top: 20px;
  font-weight: bold;
  font-size: 1.2rem;
  text-align: center;
  padding: 15px;
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 400px;
}

.result-success { background-color: rgba(40, 167, 69, 0.1); color: var(--success-color); }
.result-warning { background-color: rgba(255, 193, 7, 0.1); color: var(--warning-color); }
.result-danger { background-color: rgba(220, 53, 69, 0.1); color: var(--danger-color); }
.result-unknown { background-color: rgba(108, 117, 125, 0.1); color: #6c757d; }

#explanation {
  margin-top: 15px;
  font-size: 0.9rem;
  text-align: center;
  max-width: 400px;
  opacity: 0.8;
}

#footer {
  text-align: center;
  font-size: 0.85rem;
  color: #999;
  margin-top: 20px;
  padding: 10px 0;
}

#footer a {
  text-decoration: none;
  color: #888;
  transition: color var(--transition-speed);
}

#footer a:hover {
  color: var(--primary-color);
}

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 200px;
  background-color: #555;
  color: #fff;
  text-align: center;
  border-radius: var(--border-radius);
  padding: 5px;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -100px;
  opacity: 0;
  transition: opacity var(--transition-speed);
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

.loading {
  position: relative;
}

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid #f3f3f3;
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@media (max-width: 480px) {
  html {
    align-items: flex-start;
  }
  
  body {
    margin: 20px;
    padding: 15px;
    width: calc(100% - 40px);
  }

  h1 {
    font-size: 1.5rem;
  }

  .input-container {
    max-width: 100%;
  }
}

/* Additional Information Styles */
.info-section {
  margin: 20px auto;
  max-width: 600px;
  padding: 15px;
  border-radius: 8px;
  background-color: var(--card-bg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  opacity: 0;
  height: 0;
  margin-top: 0;
  padding-top: 0;
  padding-bottom: 0;
  transform: translateY(20px);
  transition: all var(--transition-speed);
  overflow: hidden;
}

.info-section.visible {
  opacity: 1;
  height: auto;
  margin-top: 20px;
  padding-top: 15px;
  padding-bottom: 15px;
  transform: translateY(0);
}

.model-image {
  text-align: center;
  margin-bottom: 15px;
}

.model-image img {
  max-width: 300px;
  height: auto;
  border-radius: 8px;
}

.model-details {
  padding: 10px;
  background-color: var(--details-bg);
  border-radius: 6px;
  margin-bottom: 15px;
}

.model-details h4 {
  margin: 0 0 10px 0;
  color: var(--text-color);
}

.model-details ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.model-details li {
  padding: 5px 0;
  border-bottom: 1px solid var(--border-color);
}

.model-details li:last-child {
  border-bottom: none;
}

#guide-info h3 {
  margin-top: 0;
  color: var(--text-color);
}

.guide-link {
  display: block;
  padding: 10px;
  margin: 5px 0;
  background-color: var(--details-bg);
  border-radius: 6px;
  color: var(--text-color);
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.guide-link:hover {
  background-color: var(--hover-bg);
}

.guide-link i {
  margin-right: 8px;
}

/* Dark mode specific styles for info sections */
.dark-mode .info-section {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.dark-mode .model-details {
  background-color: var(--dark-details-bg);
}

.dark-mode .guide-link {
  background-color: var(--dark-details-bg);
}

.dark-mode .guide-link:hover {
  background-color: var(--dark-hover-bg);
}