:root {
  color-scheme: dark light;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: #f4f6fb;
  color: #1f2933;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: #1f6feb;
  color: #ffffff;
}

header h1 {
  margin: 0;
  font-size: 1.25rem;
}

.controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

button {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.4rem;
  background: #2563eb;
  color: #ffffff;
  font-weight: 600;
  cursor: pointer;
}

button[disabled] {
  background: #94a3b8;
  cursor: not-allowed;
}

main {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding: 1rem 1.5rem;
}

.panel {
  background: #ffffff;
  border-radius: 0.75rem;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel h2 {
  margin: 0;
  padding: 0.75rem 1rem;
  background: #f1f5f9;
  border-bottom: 1px solid #e2e8f0;
  font-size: 1rem;
}

.scrollable {
  flex: 1;
  padding: 0.9rem 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.transcript-line {
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}

.bucket-card {
  border: 1px solid #cbd5f5;
  border-radius: 0.6rem;
  padding: 0.75rem;
  background: #eff6ff;
}

.bucket-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 0.95rem;
}

.bucket-card p {
  margin: 0.25rem 0;
  white-space: pre-wrap;
}

.qa {
  padding: 1rem 1.5rem 2rem;
  background: #ffffff;
  border-top: 1px solid #e2e8f0;
}

#qaForm {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

#qaInput {
  flex: 1;
  padding: 0.6rem 0.8rem;
  border: 1px solid #cbd5f5;
  border-radius: 0.5rem;
  font-size: 1rem;
}

#qaAnswer {
  padding: 0.75rem 1rem;
  border-radius: 0.6rem;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  min-height: 3rem;
}

@media (max-width: 1024px) {
  main {
    grid-template-columns: 1fr;
  }
}