.flash-shell {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 72px;
}

.flash-hero {
  max-width: 760px;
  margin-bottom: 56px;
}

.flash-hero h1 {
  margin: 0;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(3rem, 6vw, 5.25rem);
  font-weight: 400;
  line-height: 0.9;
  text-wrap: balance;
}

.section-kicker {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
}

.flash-layout {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
}

.study-settings,
.flash-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.study-settings {
  padding: 26px;
}

.study-settings h2 {
  margin: 0 0 26px;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 2rem;
  font-weight: 400;
  text-wrap: balance;
}

.study-settings > label,
#answer-form > label {
  display: block;
  margin-bottom: 7px;
  font-size: 0.72rem;
  font-weight: 700;
}

#study-key,
#chord-answer {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--ink);
  background: var(--surface);
  font: inherit;
}

#study-key {
  padding: 0 12px;
}

#study-key-help,
#answer-help {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.5;
  text-wrap: pretty;
}

.score-board {
  display: grid;
  gap: 10px;
  margin: 28px 0;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.score-board div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
}

.score-board dt,
.score-board dd {
  margin: 0;
}

.score-board dt {
  color: var(--muted);
  font-size: 0.72rem;
}

.score-board dd {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 1.6rem;
  font-variant-numeric: tabular-nums;
}

.quality-guide h3 {
  margin: 0 0 7px;
  font-size: 0.72rem;
}

.quality-guide p {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  line-height: 1.6;
  text-wrap: pretty;
}

.flash-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 560px;
  padding: 38px;
}

.card-context {
  padding: 22px 24px;
  border-radius: 14px;
  background: var(--dark-ring);
  color: var(--surface);
}

.card-context p {
  margin: 0;
}

.context-label {
  margin-bottom: 7px !important;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
}

.key-statement {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  color: #d7d3c8;
  font-size: 1rem;
  line-height: 1;
}

.key-statement strong {
  color: var(--surface);
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 400;
  line-height: 0.9;
  text-wrap: balance;
}

.context-hint {
  margin-top: 12px !important;
  color: #d7d3c8;
  font-size: 0.68rem;
  line-height: 1.45;
  text-wrap: pretty;
}

.roman-prompt {
  padding: 32px 0;
  text-align: center;
}

#flash-degree {
  display: block;
  margin-bottom: 8px;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(5rem, 12vw, 8rem);
  line-height: 0.8;
}

.roman-prompt h2 {
  margin: 0;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  text-wrap: balance;
}

#chord-answer {
  padding: 0 14px;
  font-size: 1rem;
}

#study-key:focus-visible,
#chord-answer:focus-visible,
.flash-actions button:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 3px;
}

#chord-answer[aria-invalid="true"] {
  border-color: #a34132;
}

.answer-feedback {
  min-height: 22px;
  margin: 10px 0 0;
  font-size: 0.76rem;
  font-weight: 700;
}

.answer-feedback.is-correct {
  color: #42683c;
}

.answer-feedback.is-incorrect {
  color: #96392d;
}

.answer-feedback.is-revealed {
  color: var(--muted);
}

.flash-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.flash-actions button {
  min-height: 44px;
  padding: 0 15px;
  border-radius: 9px;
  font: inherit;
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
}

.primary-action {
  border: 1px solid var(--accent);
  color: var(--surface);
  background: var(--accent);
}

.secondary-action {
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--surface);
}

.flash-actions button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

@media (max-width: 760px) {
  .flash-layout {
    grid-template-columns: 1fr;
  }

  .study-settings {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 12px 24px;
  }

  .study-settings .section-kicker,
  .study-settings h2,
  .score-board,
  .quality-guide {
    grid-column: 1 / -1;
  }

  .study-settings h2 {
    margin-bottom: 6px;
  }
}

@media (max-width: 560px) {
  .flash-shell {
    width: min(100% - 24px, 1080px);
    padding-top: 24px;
  }

  .flash-hero {
    margin-bottom: 44px;
  }

  .study-settings {
    display: block;
  }

  .flash-card {
    min-height: 520px;
    padding: 24px;
    border-radius: 16px;
  }

  .card-context {
    padding: 20px;
  }

  .flash-actions button {
    flex: 1 1 120px;
  }
}