:root {
  color-scheme: light;
  --fc-page: var(--dvm-color-page, #f6f1e8);
  --fc-surface: var(--dvm-color-surface, #ffffff);
  --fc-surface-soft: var(--dvm-color-surface-elevated, #faf7f0);
  --fc-navy: var(--dvm-brand-navy, #0b1d3a);
  --fc-text: var(--dvm-color-text, #102a43);
  --fc-muted: var(--dvm-color-text-muted, #52606d);
  --fc-border: var(--dvm-color-border, #cbd5e1);
  --fc-teal: var(--dvm-color-primary, #0f766e);
  --fc-teal-dark: var(--dvm-color-primary-hover, #0b5b55);
  --fc-teal-soft: #edf8f6;
  --fc-gold: var(--dvm-brand-gold, #c9a24a);
  --fc-gold-text: var(--dvm-color-accent, #8a5a14);
  --fc-gold-soft: #fff8e7;
  --fc-red: var(--dvm-color-error, #b42318);
  --fc-red-soft: #fff1ef;
  --fc-blue: var(--dvm-color-info, #245f91);
  --fc-blue-soft: #eef5fb;
  --fc-shadow: 0 10px 28px rgba(11, 29, 58, 0.08);
  --fc-shadow-low: 0 3px 10px rgba(11, 29, 58, 0.06);
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.flashcard-content {
  box-sizing: border-box;
  width: min(100%, 1180px);
  max-width: 1180px;
  margin: 0 auto;
  padding-top: 28px;
  padding-bottom: 48px;
}

.flashcard-content svg {
  display: block;
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.flashcard-title-block {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(16, 42, 67, 0.14);
}

.flashcard-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 8px;
  color: var(--fc-muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.flashcard-breadcrumbs a {
  color: var(--fc-teal-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.flashcard-title-block h1 {
  margin: 0;
  color: var(--fc-navy);
  font-family: "Plus Jakarta Sans", "Source Sans 3", system-ui, sans-serif;
  font-size: clamp(2rem, 3.4vw, 2.75rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.flashcard-title-block > div:first-child > p {
  max-width: 720px;
  margin: 9px 0 0;
  color: var(--fc-muted);
  font-size: 1rem;
  line-height: 1.55;
}

.deck-metadata {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 13px;
}

.deck-metadata span {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid rgba(16, 42, 67, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--fc-muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.title-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  padding-top: 27px;
}

.sample-badge,
.soon-badge {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border: 1px solid #9bd7d0;
  border-radius: 999px;
  background: var(--fc-teal-soft);
  color: var(--fc-teal-dark);
  font-size: 0.74rem;
  font-weight: 800;
  white-space: nowrap;
}

.soon-badge {
  border-color: #e4cf91;
  background: var(--fc-gold-soft);
  color: var(--fc-gold-text);
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 9px;
  font-family: "Source Sans 3", system-ui, sans-serif;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button-primary {
  min-width: 190px;
  border: 1px solid var(--fc-teal);
  background: var(--fc-teal);
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(15, 118, 110, 0.17);
}

.button-primary:hover {
  border-color: var(--fc-teal-dark);
  background: var(--fc-teal-dark);
}

.button-secondary {
  border: 1px solid var(--fc-border);
  background: var(--fc-surface);
  color: var(--fc-navy);
}

.button-secondary:hover:not(:disabled) {
  border-color: var(--fc-teal);
  color: var(--fc-teal-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.state-panel {
  display: flex;
  min-height: 220px;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 32px;
  border: 1px solid var(--fc-border);
  border-radius: 14px;
  background: var(--fc-surface);
  box-shadow: var(--fc-shadow-low);
}

.state-panel h2 {
  margin: 0;
  color: var(--fc-navy);
  font-family: "Plus Jakarta Sans", "Source Sans 3", system-ui, sans-serif;
  font-size: 1.1rem;
}

.state-panel p {
  margin: 4px 0 0;
  color: var(--fc-muted);
}

.state-error {
  border-color: #ebc2bd;
  background: var(--fc-red-soft);
}

.state-error > svg {
  width: 28px;
  height: 28px;
  color: var(--fc-red);
}

.loading-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid #cae3df;
  border-top-color: var(--fc-teal);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.player-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: start;
  gap: 18px;
}

.player-column {
  min-width: 0;
}

.card-status-row {
  display: flex;
  min-height: 38px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 4px 8px;
}

.card-status-row > div {
  display: flex;
  align-items: center;
  gap: 9px;
}

#card-position,
.session-truth {
  margin: 0;
  color: var(--fc-muted);
  font-size: 0.82rem;
}

#card-position {
  color: var(--fc-navy);
  font-weight: 800;
}

.competency-tag {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--fc-blue-soft);
  color: var(--fc-blue);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: capitalize;
}

.progress-track {
  height: 5px;
  overflow: hidden;
  border-radius: 999px;
  background: #dce5e9;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--fc-teal);
  transition: width 180ms ease;
}

.flashcard {
  margin-top: 12px;
  overflow: hidden;
  border: 1px solid var(--fc-border);
  border-radius: 14px;
  background: var(--fc-surface);
  box-shadow: var(--fc-shadow);
}

.prompt-area {
  display: grid;
  min-height: 320px;
  place-content: center;
  padding: clamp(42px, 6vw, 72px);
  text-align: center;
}

.flashcard.has-answer .prompt-area {
  min-height: 220px;
  padding-block: 34px;
}

.card-kicker,
.section-kicker {
  margin: 0 0 12px;
  color: var(--fc-teal-dark);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.flashcard h2 {
  max-width: 760px;
  margin: 0 auto;
  color: var(--fc-navy);
  font-family: "Plus Jakarta Sans", "Source Sans 3", system-ui, sans-serif;
  font-size: clamp(1.55rem, 2.55vw, 2.2rem);
  line-height: 1.28;
  letter-spacing: -0.035em;
}

.answer-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  scroll-margin-top: 96px;
  border-top: 1px solid var(--fc-border);
  background: #fbfcfd;
}

.answer-copy,
.rationale-copy {
  padding: 26px 28px;
}

.rationale-copy {
  border-left: 1px solid var(--fc-border);
  background: var(--fc-teal-soft);
}

.answer-text {
  margin: 0;
  color: var(--fc-navy);
  font-family: "Plus Jakarta Sans", "Source Sans 3", system-ui, sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.55;
}

.rationale-copy h3 {
  margin: 0 0 7px;
  color: var(--fc-teal-dark);
  font-family: "Plus Jakarta Sans", "Source Sans 3", system-ui, sans-serif;
  font-size: 0.9rem;
}

.rationale-copy p {
  margin: 0;
  color: var(--fc-text);
  line-height: 1.6;
}

.card-actions {
  display: grid;
  grid-template-columns: minmax(120px, 0.78fr) minmax(190px, 1.2fr) minmax(120px, 0.78fr);
  gap: 10px;
  margin-top: 12px;
}

.reveal-action {
  display: contents;
}

.rating-panel {
  display: grid;
  grid-template-columns: minmax(165px, 0.68fr) minmax(0, 2fr);
  align-items: center;
  gap: 18px;
  margin-top: 12px;
  padding: 18px 20px;
  border: 1px solid var(--fc-border);
  border-radius: 12px;
  background: var(--fc-surface);
  box-shadow: var(--fc-shadow-low);
}

.rating-panel h3 {
  margin: 0;
  color: var(--fc-navy);
  font-family: "Plus Jakarta Sans", "Source Sans 3", system-ui, sans-serif;
  font-size: 0.94rem;
}

.rating-panel > div > p {
  margin: 3px 0 0;
  color: var(--fc-muted);
  font-size: 0.78rem;
}

.rating-buttons {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.rating-button {
  display: grid;
  min-height: 62px;
  grid-template-columns: 21px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  padding: 9px 11px;
  border: 1px solid var(--fc-border);
  border-radius: 9px;
  background: var(--fc-surface);
  color: var(--fc-text);
  text-align: left;
}

.rating-button span {
  display: grid;
}

.rating-button strong {
  font-size: 0.87rem;
}

.rating-button small {
  color: var(--fc-muted);
  font-size: 0.69rem;
}

.rating-again svg { color: var(--fc-red); }
.rating-unsure svg { color: var(--fc-gold-text); }
.rating-know svg { color: var(--fc-teal); }

.rating-again:hover,
.rating-again[aria-pressed="true"] {
  border-color: #df8d84;
  background: var(--fc-red-soft);
}

.rating-unsure:hover,
.rating-unsure[aria-pressed="true"] {
  border-color: #d3b560;
  background: var(--fc-gold-soft);
}

.rating-know:hover,
.rating-know[aria-pressed="true"] {
  border-color: #7fc4bc;
  background: var(--fc-teal-soft);
}

.linked-learning,
.future-tools,
.session-card,
.keyboard-card {
  border: 1px solid var(--fc-border);
  border-radius: 12px;
  background: var(--fc-surface);
}

.linked-learning {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 18px;
  padding: 20px;
}

.linked-learning h2,
.future-tools h2,
.session-card h2 {
  margin: 0;
  color: var(--fc-navy);
  font-family: "Plus Jakarta Sans", "Source Sans 3", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.3;
}

.linked-learning p:not(.section-kicker) {
  max-width: 600px;
  margin: 5px 0 0;
  color: var(--fc-muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.future-tools {
  display: grid;
  grid-template-columns: minmax(190px, 0.64fr) minmax(0, 1.36fr);
  align-items: center;
  gap: 20px;
  margin-top: 12px;
  padding: 16px 18px;
  border-style: dashed;
  background: rgba(255, 255, 255, 0.55);
}

.future-tools > div {
  display: flex;
  align-items: center;
  gap: 9px;
}

.future-tools p {
  margin: 0;
  color: var(--fc-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.session-column {
  display: grid;
  gap: 12px;
}

.session-card {
  padding: 19px;
  box-shadow: var(--fc-shadow-low);
}

.session-counts {
  display: grid;
  margin: 16px 0 0;
}

.session-counts div {
  display: flex;
  min-height: 42px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid rgba(16, 42, 67, 0.12);
}

.session-counts dt {
  color: var(--fc-muted);
  font-size: 0.82rem;
}

.session-counts dd {
  margin: 0;
  color: var(--fc-navy);
  font-family: "Plus Jakarta Sans", "Source Sans 3", system-ui, sans-serif;
  font-weight: 800;
}

.session-note {
  margin: 13px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(16, 42, 67, 0.12);
  color: var(--fc-muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.keyboard-card {
  overflow: hidden;
  box-shadow: var(--fc-shadow-low);
}

.keyboard-card summary {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  padding: 11px 16px;
  color: var(--fc-navy);
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.keyboard-card summary::-webkit-details-marker {
  display: none;
}

.keyboard-card summary::after {
  color: var(--fc-teal);
  font-size: 1.15rem;
  content: "+";
}

.keyboard-card[open] summary::after {
  content: "−";
}

.keyboard-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0 16px 16px 34px;
  color: var(--fc-muted);
  font-size: 0.78rem;
}

kbd {
  display: inline-block;
  min-width: 23px;
  padding: 2px 5px;
  border: 1px solid var(--fc-border);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: #f8fafc;
  color: var(--fc-navy);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.7rem;
  text-align: center;
}

@media (max-width: 1180px) {
  .player-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .session-column {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.7fr);
  }
}

@media (max-width: 900px) {
  .flashcard-content {
    padding-top: 24px;
    padding-bottom: 96px;
  }

  .flashcard-title-block {
    display: grid;
    gap: 16px;
  }

  .title-actions {
    justify-content: flex-start;
    padding-top: 0;
  }

  .session-truth {
    display: none;
  }
}

@media (max-width: 700px) {
  .flashcard-content {
    padding-top: 18px;
  }

  .flashcard-title-block {
    margin-bottom: 18px;
    padding-bottom: 18px;
  }

  .flashcard-title-block h1 {
    font-size: 1.85rem;
  }

  .flashcard-title-block > div:first-child > p,
  .deck-metadata {
    display: none;
  }

  .title-actions {
    align-items: center;
  }

  .title-actions .button {
    flex: 1;
  }

  .prompt-area {
    min-height: 200px;
    padding: 32px 20px;
  }

  .flashcard h2 {
    font-size: 1.42rem;
  }

  .answer-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .rationale-copy {
    border-top: 1px solid var(--fc-border);
    border-left: 0;
  }

  .answer-copy,
  .rationale-copy {
    padding: 21px 20px;
  }

  .card-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #reveal-button {
    order: -1;
    grid-column: 1 / -1;
  }

  .rating-panel,
  .future-tools {
    grid-template-columns: minmax(0, 1fr);
  }

  .linked-learning {
    display: grid;
    gap: 14px;
  }

  .linked-learning .button {
    width: 100%;
  }

  .future-tools > div {
    align-items: flex-start;
    flex-direction: column;
  }

  .session-column {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 480px) {
  .title-actions {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .sample-badge {
    align-self: center;
    justify-self: start;
  }

  .rating-buttons {
    grid-template-columns: minmax(0, 1fr);
  }

  .rating-button {
    min-height: 58px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}