.problem-card {
  background: var(--glass);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: 0 0 60px 2px color-mix(in srgb, var(--accent) 11%, transparent);
  padding: 36px 20px;
  text-align: center;
  margin-bottom: 16px;
  position: relative;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.problem-card.good {
  background: rgba(74, 222, 128, 0.15);
  border-color: var(--good);
}

.problem-card.bad {
  background: rgba(228, 74, 74, 0.15);
  border-color: var(--bad);
}

.problem {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: 2px;
}

.problem-feedback {
  font-size: 14px;
  color: var(--text-dim);
  margin-top: 8px;
  min-height: 18px;
}

.choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.choice-btn {
  background: var(--bg-card);
  border: 2px solid var(--border);
  color: var(--text);
  border-radius: 14px;
  padding: 20px;
  font-size: 26px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.1s;
}

.choice-btn:hover { border-color: var(--accent-dim); }
.choice-btn:active { transform: scale(0.97); }
.choice-btn.good { background: rgba(74, 222, 128, 0.2); border-color: var(--good); }
.choice-btn.bad { background: rgba(228, 74, 74, 0.2); border-color: var(--bad); }