* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

nav {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: flex;
  gap: 0.5rem;
  z-index: 100;
}

nav a {
  background: rgba(255, 255, 255, 0.9);
  color: #374151;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease;
}

nav a:hover {
  background: white;
  transform: translateY(-1px);
}

nav a.active {
  background: #6366f1;
  color: white;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, sans-serif;
  background-color: #6366f1;
  transition: background-color 0.5s ease;
}

.container {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  text-align: center;
  max-width: 400px;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: #1f2937;
}

.subtitle {
  color: #6b7280;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.current-color {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: #f3f4f6;
  border-radius: 8px;
}

.color-name {
  font-weight: bold;
  color: #374151;
}

.ai-badge {
  display: none !important;
  background: #10b981;
  color: white;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.5rem;
}

.ai-badge.show {
  display: inline-block !important;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

.color-input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

#colorPicker {
  width: 50px;
  height: 40px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  padding: 0;
}

#colorText {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  font-size: 0.9rem;
}

#colorText:focus {
  outline: none;
  border-color: #6366f1;
}

#applyColor {
  background: #6366f1;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}

#applyColor:hover {
  background: #4f46e5;
}

.instructions {
  font-size: 0.85rem;
  color: #9ca3af;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #e5e7eb;
}