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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
  color: #2d3748;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  padding: 40px;
  text-align: center;
  color: white;
}

.header h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 10px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header p {
  font-size: 1.2rem;
  opacity: 0.9;
}

.main-content {
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.section {
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.section:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.section h2 {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: #2d3748;
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 14px;
}

.form-group {
  margin-bottom: 25px;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: #4a5568;
}

textarea,
input {
  width: 100%;
  padding: 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 14px;
  transition: all 0.3s ease;
  resize: vertical;
}

textarea:focus,
input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

button {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 16px 32px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 100%;
  position: relative;
  overflow: hidden;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

button:active {
  transform: translateY(0);
}

.result {
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  padding: 20px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 120px;
  margin-top: 15px;
}

.vocab-section {
  grid-column: span 2;
  max-height: 400px;
  overflow-y: auto;
}

.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 15px;
  margin-top: 20px;
}

.vocab-item {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
  padding: 15px;
  border-radius: 12px;
  text-align: center;
  font-weight: 600;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.stats {
  display: flex;
  justify-content: space-around;
  background: #edf2f7;
  padding: 20px;
  border-radius: 12px;
  margin-top: 20px;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: #667eea;
}

.stat-label {
  font-size: 0.9rem;
  color: #718096;
  font-weight: 500;
}

@media (max-width: 768px) {
  .main-content {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px;
  }

  .vocab-section {
    grid-column: span 1;
  }

  .header h1 {
    font-size: 2rem;
  }
}