.variation-drill-group {
  margin-bottom: 2.5rem;
  border-top: 1px solid #e0e0e0;
  padding-top: 1.25rem;
}

.variation-drill-group:first-child {
  border-top: none;
  padding-top: 0;
}

.variation-drill-number {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: #555;
  margin-bottom: 0.75rem;
}

.variation-drill-base {
  display: flex;
  gap: 2rem;
  padding: 0.35rem 0;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.variation-drill-base .text-en,
.variation-drill-base .text-de {
  flex: 1;
}

.variation-drill-base .text-de {
  font-style: italic;
}

.variation-drill-context {
  font-size: 0.9rem;
  color: #555;
  margin: 0.75rem 0 0.4rem;
  padding-left: 0.25rem;
}

.variation-context-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.variation-context-pill {
  padding: 0.3rem 0.9rem;
  border: 1px solid #e0e0e0;
  border-radius: 999px;
  background: #fff;
  color: #6c757d;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.variation-context-pill:hover {
  border-color: #1976d2;
  color: #1976d2;
}

.variation-context-pill.active {
  background: #1976d2;
  border-color: #1976d2;
  color: #fff;
}

.variation-drill-item {
  margin-bottom: 0.75rem;
}

.variation-drill-sentences {
  width: 100%;
  border-collapse: collapse;
}

.variation-drill-sentences td {
  padding: 0.2rem 0.4rem;
  vertical-align: top;
}

.variation-label {
  width: 1.75rem;
  font-weight: 600;
  color: #555;
  flex-shrink: 0;
}

.variation-drill-sentences .text-en {
  width: 50%;
}

.variation-drill-sentences .text-de {
  width: 50%;
}

.variation-drill-sentences tr .text-de {
  color: transparent;
  user-select: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='16'%3E%3Cpath d='M0,6 Q7.5,2 15,6 Q22.5,10 30,6' stroke='%231a1a1a' stroke-width='3.5' fill='none' stroke-linecap='round'/%3E%3Cpath d='M0,9 Q7.5,5 15,9 Q22.5,13 30,9' stroke='%231a1a1a' stroke-width='3' fill='none' stroke-linecap='round'/%3E%3Cpath d='M0,12 Q7.5,8 15,12 Q22.5,16 30,12' stroke='%23222' stroke-width='2.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-position: left center;
  background-size: 30px 16px;
  filter: blur(0.6px);
  transition: color 0.15s ease, filter 0.15s ease;
}

.variation-drill-sentences tr:hover .text-de {
  color: inherit;
  user-select: auto;
  background-image: none;
  filter: none;
}