.practice-topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.practice-title {
  font-size: 28px;
  font-weight: 800;
  margin: 0;
}

.practice-subtitle {
  color: var(--color-text-tertiary);
  margin-top: 8px;
  font-size: 14px;
}

.practice-staff-card,
.practice-keyboard-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 18px;
  box-shadow: var(--shadow-sm);
}

.practice-staff-card {
  margin-top: 8px;
}

.staff-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.staff-meta-item {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 10px 12px;
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.staff-meta-item .label {
  font-size: 12px;
  color: var(--color-text-tertiary);
}
.staff-meta-item .value {
  font-size: 13px;
  font-weight: 700;
}

.staff-stage {
  min-height: 220px;
  border-radius: 18px;
  border: 1px dashed var(--color-border-lighter);
  background: linear-gradient(180deg, #fff, #fafafa);
  display: grid;
  place-items: center;
  padding: 12px;
}
.staff-placeholder {
  color: var(--color-text-tertiary);
  font-size: 14px;
}

.staff-simple {
  width: 100%;
  max-width: 720px;
  display: grid;
  gap: 10px;
  justify-items: center;
}
.staff-simple .pitch {
  font-size: 64px;
  font-weight: 900;
  letter-spacing: 0.02em;
}
.staff-simple .hint {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.practice-keyboard-card {
  margin-top: 16px;
}

.practice-feedback-row {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.practice-feedback {
  flex: 1;
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
}

.practice-feedback.is-correct {
  border-color: rgba(16, 185, 129, 0.35);
  background: rgba(16, 185, 129, 0.10);
  color: #065f46;
}
.practice-feedback.is-incorrect {
  border-color: rgba(239, 68, 68, 0.35);
  background: rgba(239, 68, 68, 0.10);
  color: #7f1d1d;
}

/* Keyboard */
.note-answer-keyboard {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.keyboard-row {
  display: flex;
  gap: 10px;
}
.note-key {
  flex: 1;
  height: 50px;
  border-radius: 14px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
  display: grid;
  place-items: center;
  user-select: none;
}
.note-key:hover:not(:disabled) {
  background: #f8fafc;
  border-color: var(--color-border-lighter);
}
.note-key.pressed {
  transform: scale(0.97);
}
.key-content {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}
.key-letter {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text-primary);
}
.key-accidental {
  font-size: 18px;
  color: var(--color-text-primary);
}

.note-key.correct {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.55);
}
.note-key.incorrect {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.55);
}

@media (max-width: 768px) {
  .keyboard-row {
    gap: 8px;
  }
  .note-key {
    height: 44px;
  }
  .staff-simple .pitch {
    font-size: 52px;
  }
}