.app-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

.app-header {
  text-align: center;
  margin-bottom: 24px;
}

.card {
  background: #ffffff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  font-weight: 700;
}

.category-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 22px;
}

.category-option {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border: 1px solid #dbe1ea;
  border-radius: 12px;
  background: #fafcff;
}

.category-option input {
  margin-top: 3px;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.settings-label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-weight: 600;
}

.settings-label select {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  background: white;
}

.meta-info {
  color: #475569;
  margin-bottom: 14px;
}

.auction-container,
.question-container,
.answers-container,
.feedback-container,
.hand-container {
  margin-bottom: 18px;
}

.auction-box {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.bid-chip {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  font-weight: 700;
}

.success {
  padding: 14px;
  border-radius: 12px;
  background: #ecfdf5;
  border: 1px solid #bbf7d0;
}

.error {
  padding: 14px;
  border-radius: 12px;
  background: #fef2f2;
  border: 1px solid #fecaca;
}

.actions {
  margin-top: 14px;
}