:root {
  font-family: Inter, system-ui, sans-serif;
  line-height: 1.4;
  color: #222;
  background: #f3f6f8;
}

.app {
  max-width: 760px;
  margin: 2rem auto;
  background: #ffffff;
  border-radius: 8px;
  padding: 1.5rem 2rem;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}

.controls label {
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.controls select,
.controls input[type="number"] {
  padding: 0.25rem 0.5rem;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  background: #fff;
}

button.primary {
  padding: 0.4rem 0.9rem;
  background: #3b82f6;
  color: #ffffff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button.primary:hover {
  background: #2563eb;
}

.status {
  margin-top: 0.5rem;
  font-weight: 500;
}

.progress-wrapper {
  margin: 0.5rem 0;
}

.progress-bar {
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar > div {
  height: 100%;
  background: #10b981;
  transition: width 0.2s;
}

.progress-text {
  font-size: 0.8rem;
  color: #555;
  margin-top: 0.25rem;
}

.textarea {
  width: 100%;
  height: 6rem;
  resize: vertical;
}

.performance {
  font-size: 0.85rem;
  background: #ecfdf5;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  border: 1px solid #d1fae5;
  margin-bottom: 1rem;
}

.history {
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  background: #ffffff;
}

.history-item {
  padding: 1rem;
  border-bottom: 1px solid #f1f5f9;
  background: #ffffff;
}

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

.history-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 0.5rem;
}

.history-stats {
  font-size: 0.75rem;
  color: #666;
  margin-bottom: 0.5rem;
}

.history-text {
  background: #f9fafb;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  border: 1px solid #e5e7eb;
  font-size: 0.9rem;
}