.lbt-grader-root {
  --lbt-primary: #3d6df2;
  --lbt-surface: #f5f7fb;
  --lbt-radius: 14px;
  --lbt-font-size: 16px;
  font-size: var(--lbt-font-size);
  color: #1f2937;
}

.lbt-card,
.lbt-result-shell {
  background: var(--lbt-surface);
  border-radius: var(--lbt-radius);
  padding: 1rem;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
  max-width: 760px;
  margin: 1rem auto;
}

.lbt-progress {
  height: 8px;
  background: #e5e7eb;
  border-radius: 999px;
  overflow: hidden;
}

.lbt-progress span {
  display: block;
  height: 100%;
  background: var(--lbt-primary);
  transition: width 200ms ease;
}

.lbt-options {
  display: grid;
  gap: 0.5rem;
  margin: 1rem 0;
}

.lbt-option {
  border: 1px solid #d1d5db;
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  display: flex;
  gap: 0.5rem;
}

.lbt-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 1rem;
}

.lbt-btn {
  background: var(--lbt-primary);
  color: #fff;
  border: 0;
  border-radius: 10px;
  padding: 0.6rem 0.95rem;
  text-decoration: none;
}

.lbt-btn-secondary {
  background: #fff;
  border: 1px solid #cbd5e1;
  color: #111827;
}

.lbt-chip,
.lbt-result-grid {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.lbt-chip {
  background: #fff;
  border: 1px solid #dbeafe;
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
}

.lbt-input {
  width: 100%;
  margin: 0.35rem 0 0.8rem;
  padding: 0.55rem;
}

.lbt-muted {
  color: #475569;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .lbt-card,
  .lbt-result-shell {
    margin: 0.75rem 0;
  }
}