.learn-main {
  min-height: 80vh;
}

.learn-hero {
  padding: 4rem 0 3rem;
}

.learn-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.85fr);
  gap: 2rem;
  align-items: end;
}

.learn-hero h1 {
  max-width: 780px;
}

.learn-hero-panel {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(233, 248, 207, 0.66));
}

.learn-workspace {
  padding: 0 0 5rem;
}

.learn-tabs {
  position: sticky;
  top: 97px;
  z-index: 8;
  display: flex;
  gap: 0.45rem;
  padding: 0.55rem;
  margin-bottom: 2rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(248, 249, 250, 0.94);
  box-shadow: 0 14px 40px rgba(17, 24, 39, 0.08);
  backdrop-filter: blur(16px);
}

.learn-tab {
  flex: 1 0 auto;
  min-width: 90px;
  padding: 0.72rem 1rem;
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.learn-tab:hover,
.learn-tab:focus-visible {
  color: var(--accent-deep);
  outline: 2px solid rgba(162, 228, 54, 0.3);
  outline-offset: 1px;
}

.learn-tab.is-active {
  color: #000000;
  background: var(--forest);
}

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

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

.learn-view {
  min-height: 42rem;
}

.view-heading,
.card-heading-row,
.review-session-header,
.review-progress-label,
.browse-summary,
.editor-actions {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.view-heading {
  margin-bottom: 1.5rem;
  align-items: end;
}

.view-heading h2,
.learn-card h3,
.card-editor h2 {
  margin-top: 0;
}

.view-heading h2 {
  margin-bottom: 0;
}

.learn-card {
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 16px 44px rgba(17, 24, 39, 0.07);
}

.study-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.metric-card {
  position: relative;
  overflow: hidden;
  min-height: 152px;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
}

.metric-card::after {
  content: "";
  position: absolute;
  right: -32px;
  bottom: -38px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: rgba(162, 228, 54, 0.09);
}

.metric-card span,
.metric-card small {
  display: block;
  color: var(--muted);
}

.metric-card strong {
  display: block;
  margin: 0.2rem 0 0.05rem;
  color: var(--text);
  font-family: "Iowan Old Style", "Palatino Linotype", serif;
  font-size: 2.7rem;
  line-height: 1;
}

.metric-due { border-top: 4px solid #b75d4c; }
.metric-new { border-top: 4px solid #4d78a7; }
.metric-mastered { border-top: 4px solid var(--fern); }
.metric-streak { border-top: 4px solid #c89036; }

.dashboard-grid,
.review-setup-grid,
.stats-grid,
.settings-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.8fr);
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.saved-locally {
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  color: var(--forest);
  background: var(--mist);
  font-size: 0.78rem;
  font-weight: 700;
}

.deck-list {
  display: grid;
  gap: 0.7rem;
}

.deck-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.85rem;
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.52);
}

.deck-row h4,
.deck-row p {
  margin: 0;
}

.deck-row p,
.muted-copy {
  color: var(--muted);
}

.deck-row p {
  font-size: 0.86rem;
}

.deck-count {
  min-width: 58px;
  text-align: center;
  color: var(--muted);
  font-size: 0.86rem;
}

.deck-study-button,
.text-button {
  border: 0;
  color: var(--accent-deep);
  background: transparent;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.deck-study-button {
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  color: #000000;
  background: var(--forest);
  text-decoration: none;
}

.deck-study-button:focus-visible,
.text-button:focus-visible {
  outline: 3px solid rgba(162, 228, 54, 0.26);
  outline-offset: 3px;
}

.ring-progress {
  --progress: 0deg;
  display: grid;
  width: 176px;
  aspect-ratio: 1;
  margin: 1.2rem auto;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(var(--fern) var(--progress), var(--mist) 0);
}

.ring-progress::before {
  content: "";
  grid-area: 1 / 1;
  width: 132px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #f8faf6;
}

.ring-progress div {
  z-index: 1;
  grid-area: 1 / 1;
  text-align: center;
}

.ring-progress strong,
.ring-progress span {
  display: block;
}

.ring-progress strong {
  font-size: 2.4rem;
  line-height: 1;
}

.ring-progress span {
  color: var(--muted);
}

.activity-list {
  display: grid;
  gap: 0.65rem;
}

.activity-item,
.activity-empty {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.75rem 0;
  border-top: 1px solid var(--line);
}

.activity-empty {
  grid-template-columns: 1fr;
  color: var(--muted);
}

.activity-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--fern);
}

.activity-item p,
.activity-item small {
  margin: 0;
}

.activity-item small,
.activity-time {
  color: var(--muted);
}

.session-options,
.shortcut-card {
  padding: 1.6rem;
}

.session-options label,
.card-toolbar label,
.settings-form label,
.card-editor label {
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.session-options select,
.card-toolbar input,
.card-toolbar select,
.settings-form input,
.settings-form select,
.card-editor input,
.card-editor textarea {
  width: 100%;
  padding: 0.78rem 0.85rem;
  border: 1px solid rgba(17, 24, 39, 0.16);
  border-radius: 12px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.9);
  font: inherit;
}

.session-options select:focus,
.card-toolbar input:focus,
.card-toolbar select:focus,
.settings-form input:focus,
.settings-form select:focus,
.card-editor input:focus,
.card-editor textarea:focus {
  border-color: var(--fern);
  outline: 3px solid rgba(162, 228, 54, 0.16);
}

.session-counts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  margin: 1.2rem 0;
}

.session-counts div {
  padding: 0.8rem;
  border-radius: 14px;
  text-align: center;
  background: var(--bg-strong);
}

.session-counts strong,
.session-counts span {
  display: block;
}

.session-counts strong {
  font-size: 1.6rem;
}

.session-counts span {
  color: var(--muted);
  font-size: 0.78rem;
}

.shortcut-list {
  margin: 0;
}

.shortcut-list div {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 0.8rem;
  align-items: center;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}

.shortcut-list dt,
.shortcut-list dd {
  margin: 0;
}

kbd {
  display: inline-block;
  min-width: 1.8rem;
  padding: 0.15rem 0.4rem;
  border: 1px solid rgba(17, 24, 39, 0.2);
  border-bottom-width: 3px;
  border-radius: 6px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.88);
  font: 0.78rem/1.3 Consolas, monospace;
  text-align: center;
}

.review-session {
  max-width: 900px;
  margin: 0 auto;
}

.review-session-header {
  margin-bottom: 1.1rem;
}

.review-progress-wrap {
  flex: 1;
  max-width: 520px;
}

.review-progress-label {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.review-progress {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--mist);
}

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

.flashcard {
  min-height: 430px;
  padding: 1.6rem clamp(1.25rem, 5vw, 3.8rem) 2rem;
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: 28px;
  background:
    radial-gradient(circle at top right, rgba(162, 228, 54, 0.18), transparent 20rem),
    rgba(255, 255, 255, 0.86);
  box-shadow: 0 28px 70px rgba(17, 24, 39, 0.12);
}

.flashcard-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.flashcard-meta span {
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  color: var(--forest);
  background: var(--mist);
  font-size: 0.78rem;
  font-weight: 700;
}

.flashcard-front,
.flashcard-answer {
  max-width: 720px;
  margin: 2rem auto 0;
}

.flashcard-front h2 {
  margin-top: 0.2rem;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}

.card-side-label {
  margin: 0;
  color: var(--accent-deep);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.flashcard-hint,
.answer-note {
  color: var(--muted);
}

.answer-divider {
  height: 1px;
  margin-bottom: 1.5rem;
  background: var(--line);
}

.flashcard-answer > p:not(.card-side-label) {
  white-space: pre-line;
}

.flashcard-answer pre {
  overflow-x: auto;
  margin: 1.2rem 0;
  padding: 1rem;
  border-radius: 14px;
  color: #edf7ef;
  background: #17241b;
  white-space: pre-wrap;
}

.reveal-row {
  display: flex;
  justify-content: center;
  margin-top: 1.2rem;
}

.reveal-button {
  min-width: 240px;
}

.reveal-button kbd {
  margin-left: 0.5rem;
}

.rating-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
  margin-top: 1.2rem;
}

.rating-button {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.15rem 0.6rem;
  align-items: center;
  min-height: 78px;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.82);
  font: inherit;
  cursor: pointer;
}

.rating-button strong,
.rating-button span {
  text-align: left;
}

.rating-button span {
  color: var(--muted);
  font-size: 0.78rem;
}

.rating-button kbd {
  grid-column: 2;
  grid-row: 1 / span 2;
}

.rating-button:hover,
.rating-button:focus-visible {
  transform: translateY(-2px);
  outline: 3px solid rgba(162, 228, 54, 0.16);
}

.rating-again { border-top: 4px solid #b75d4c; }
.rating-hard { border-top: 4px solid #c89036; }
.rating-good { border-top: 4px solid var(--fern); }
.rating-easy { border-top: 4px solid #4d78a7; }

.session-complete {
  max-width: 680px;
  margin: 2rem auto;
  padding: 3rem;
  text-align: center;
}

.session-complete .hero-actions {
  justify-content: center;
}

.complete-mark {
  display: inline-grid;
  width: 72px;
  height: 72px;
  margin-bottom: 1.2rem;
  place-items: center;
  border-radius: 50%;
  color: white;
  background: var(--fern);
  font-size: 2rem;
  font-weight: 800;
}

.card-toolbar {
  display: grid;
  grid-template-columns: minmax(240px, 1.7fr) minmax(180px, 0.8fr) minmax(160px, 0.7fr);
  gap: 1rem;
}

.browse-summary {
  margin: 1rem 0;
}

.browse-summary p {
  margin: 0;
  color: var(--muted);
}

.card-library {
  display: grid;
  gap: 0.8rem;
}

.library-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(150px, 0.35fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.library-card.is-suspended {
  opacity: 0.58;
}

.library-card h3,
.library-card p {
  margin: 0;
}

.library-card p,
.library-meta,
.library-schedule {
  color: var(--muted);
  font-size: 0.84rem;
}

.library-meta,
.library-schedule {
  display: grid;
  gap: 0.2rem;
}

.library-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem;
}

.small-action {
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--forest);
  background: rgba(248, 249, 250, 0.9);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.small-action:hover,
.small-action:focus-visible {
  border-color: var(--fern);
  outline: 2px solid rgba(162, 228, 54, 0.16);
}

.small-action.danger-action,
.danger-text {
  color: #8f3f35;
}

.empty-state {
  text-align: center;
}

.mastery-list {
  display: grid;
  gap: 0.9rem;
}

.mastery-row {
  display: grid;
  gap: 0.35rem;
}

.mastery-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.mastery-track {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--mist);
}

.mastery-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--fern), var(--forest));
}

.forecast-chart {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.55rem;
  min-height: 230px;
  align-items: end;
}

.forecast-day {
  display: grid;
  height: 100%;
  grid-template-rows: 1fr auto auto;
  gap: 0.35rem;
  align-items: end;
  text-align: center;
}

.forecast-bar-wrap {
  display: flex;
  height: 150px;
  align-items: end;
  justify-content: center;
}

.forecast-bar {
  width: min(32px, 80%);
  min-height: 4px;
  border-radius: 8px 8px 3px 3px;
  background: var(--fern);
}

.forecast-day small {
  color: var(--muted);
}

.study-heatmap {
  display: grid;
  grid-template-columns: repeat(14, minmax(16px, 1fr));
  gap: 0.45rem;
}

.heatmap-cell {
  aspect-ratio: 1;
  border: 1px solid rgba(17, 24, 39, 0.05);
  border-radius: 5px;
  background: #e4ebe2;
}

.heatmap-cell.level-1 { background: #c9ddcc; }
.heatmap-cell.level-2 { background: #8eba97; }
.heatmap-cell.level-3 { background: #5b9566; }
.heatmap-cell.level-4 { background: var(--forest); }

.heatmap-legend {
  color: var(--muted);
  font-size: 0.8rem;
}

.heatmap-legend i {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 0.25rem;
  border-radius: 3px;
  background: var(--forest);
}

.settings-form,
.data-tools {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.data-tools p {
  margin: 0;
  color: var(--muted);
}

.data-actions {
  display: grid;
  gap: 0.7rem;
}

.data-status {
  padding: 0.8rem;
  border-radius: 12px;
  background: var(--bg-strong);
  font-size: 0.86rem;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  padding: 1rem;
  place-items: center;
  background: rgba(17, 24, 39, 0.62);
  backdrop-filter: blur(8px);
}

.modal-backdrop[hidden] {
  display: none;
}

.card-editor {
  width: min(760px, 100%);
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  padding: 1.5rem;
  border-radius: 24px;
  background: #f7faf5;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.24);
}

.card-editor form {
  display: grid;
  gap: 1rem;
}

.card-editor label span {
  font-weight: 400;
}

.card-editor textarea {
  resize: vertical;
}

.editor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.editor-actions {
  justify-content: flex-end;
}

.icon-close {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text);
  background: white;
  font-size: 1.5rem;
  cursor: pointer;
}

.icon-close:focus-visible {
  outline: 3px solid rgba(162, 228, 54, 0.25);
}

body.modal-open {
  overflow: hidden;
}

@media (max-width: 900px) {
  .learn-hero-grid,
  .dashboard-grid,
  .review-setup-grid,
  .stats-grid,
  .settings-grid {
    grid-template-columns: 1fr;
  }

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

  .learn-tabs {
    top: 0.5rem;
  }

  .card-toolbar {
    grid-template-columns: 1fr 1fr;
  }

  .search-field {
    grid-column: 1 / -1;
  }

  .library-card {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .library-meta {
    grid-column: 1;
  }

  .library-actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    max-width: 160px;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
  }

  .learn-hero {
    padding: 2.75rem 0 2rem;
  }

  .learn-tabs {
    top: 0.4rem;
    margin-inline: -0.25rem;
    border-radius: 18px;
  }

  .learn-tab {
    min-width: 82px;
    padding: 0.65rem 0.78rem;
  }

  .view-heading,
  .card-heading-row,
  .review-session-header {
    align-items: stretch;
    flex-direction: column;
  }

  .study-metrics {
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
  }

  .metric-card {
    min-height: 128px;
    padding: 0.9rem;
  }

  .metric-card strong {
    font-size: 2.1rem;
  }

  .deck-row {
    grid-template-columns: 1fr auto;
  }

  .deck-count {
    grid-column: 1;
    text-align: left;
  }

  .deck-study-button {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .flashcard {
    min-height: 390px;
    padding: 1.2rem;
    border-radius: 20px;
  }

  .rating-grid {
    grid-template-columns: 1fr 1fr;
  }

  .card-toolbar,
  .editor-grid {
    grid-template-columns: 1fr;
  }

  .search-field {
    grid-column: auto;
  }

  .library-card {
    grid-template-columns: 1fr;
  }

  .library-meta,
  .library-actions {
    grid-column: 1;
    grid-row: auto;
    max-width: none;
  }

  .library-actions {
    justify-content: flex-start;
  }

  .study-heatmap {
    grid-template-columns: repeat(7, minmax(18px, 1fr));
  }

  .session-complete {
    padding: 2rem 1rem;
  }

  .modal-backdrop {
    padding: 0;
    align-items: end;
  }

  .card-editor {
    max-height: 94vh;
    border-radius: 24px 24px 0 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .review-progress span,
  .rating-button {
    transition: none;
  }
}