:root {
  --piece-noun: #c94f32;
  --piece-noun-soft: #fff0eb;
  --piece-connector: #19708d;
  --piece-connector-soft: #e8f6f9;
  --piece-modifier: #a36b08;
  --piece-modifier-soft: #fff5d8;
  --piece-verb: #397058;
  --piece-verb-soft: #eaf5ee;
}

.piece-eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.piece-map-card {
  display: grid;
  gap: 22px;
  margin-bottom: 24px;
  padding: 26px;
  border: 1px solid rgba(31, 41, 55, 0.12);
  border-radius: 24px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(255, 250, 241, 0.84)),
    repeating-linear-gradient(90deg, transparent 0 22px, rgba(31, 41, 55, 0.025) 22px 23px);
  box-shadow: 0 18px 60px rgba(31, 41, 55, 0.08);
}

.piece-map-head,
.recipe-lab-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.piece-map-head h2,
.recipe-lab-head h2 {
  margin: 0;
  font-family: var(--ks-font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
}

.piece-map-head p:not(.piece-eyebrow) {
  margin: 8px 0 0;
  color: var(--muted);
}

.piece-map-head a {
  flex: 0 0 auto;
  padding: 10px 14px;
  border: 1px solid rgba(25, 112, 141, 0.26);
  border-radius: 999px;
  color: var(--piece-connector);
  background: var(--piece-connector-soft);
  font-size: 0.84rem;
  font-weight: 800;
  text-decoration: none;
}

.piece-guide-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.piece-guide-card {
  --piece-color: var(--piece-noun);
  --piece-soft: var(--piece-noun-soft);
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 238px;
  align-content: start;
  gap: 8px;
  padding: 18px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--piece-color) 28%, transparent);
  border-radius: 20px;
  color: var(--ink);
  background: linear-gradient(160deg, #fff 30%, var(--piece-soft));
  cursor: pointer;
  font: inherit;
  text-align: left;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.piece-guide-card::after {
  position: absolute;
  right: -28px;
  bottom: -38px;
  width: 110px;
  height: 110px;
  border: 18px solid color-mix(in srgb, var(--piece-color) 10%, transparent);
  border-radius: 50%;
  content: "";
}

[data-piece="connector"] {
  --piece-color: var(--piece-connector);
  --piece-soft: var(--piece-connector-soft);
}

[data-piece="modifier"] {
  --piece-color: var(--piece-modifier);
  --piece-soft: var(--piece-modifier-soft);
}

[data-piece="verb"] {
  --piece-color: var(--piece-verb);
  --piece-soft: var(--piece-verb-soft);
}

[data-piece="noun"] {
  --piece-color: var(--piece-noun);
  --piece-soft: var(--piece-noun-soft);
}

.piece-guide-card:hover,
.piece-guide-card.active {
  border-color: var(--piece-color);
  box-shadow: 0 14px 30px color-mix(in srgb, var(--piece-color) 15%, transparent);
  transform: translateY(-3px);
}

.piece-guide-card.active::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--piece-color);
  content: "";
}

.piece-guide-step {
  color: var(--piece-color);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.piece-guide-card strong {
  position: relative;
  z-index: 1;
  color: var(--piece-color);
  font-family: var(--ks-font-display);
  font-size: 1.2rem;
}

.piece-guide-symbol {
  position: relative;
  z-index: 1;
  font-size: 0.82rem;
  font-weight: 800;
}

.piece-guide-copy,
.piece-guide-sample,
.piece-guide-count {
  position: relative;
  z-index: 1;
}

.piece-guide-copy {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.55;
}

.piece-guide-sample {
  margin-top: auto;
  padding-top: 8px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
}

.piece-guide-count {
  color: var(--piece-color);
  font-size: 0.78rem;
  font-weight: 900;
}

.recipe-lab {
  padding: 20px;
  border: 1px solid rgba(31, 41, 55, 0.1);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.82);
}

.recipe-tabs {
  display: flex;
  gap: 6px;
}

.recipe-tabs button {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  background: white;
  cursor: pointer;
  font-weight: 900;
}

.recipe-tabs button[aria-pressed="true"] {
  border-color: var(--ink);
  color: white;
  background: var(--ink);
}

.recipe-title {
  margin: 18px 0 10px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.recipe-pieces {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.recipe-pieces span {
  padding: 9px 12px;
  border: 1px solid color-mix(in srgb, var(--piece-color) 24%, transparent);
  border-radius: 12px;
  color: var(--piece-color);
  background: var(--piece-soft);
  font-size: 1rem;
  font-weight: 900;
}

.recipe-pieces b {
  color: #a3a3a3;
}

.recipe-sentence {
  display: block;
  margin-top: 14px;
  font-size: clamp(1.25rem, 3vw, 1.7rem);
}

.recipe-lab > p:not(.recipe-title) {
  margin: 6px 0 0;
  line-height: 1.5;
}

.category-bar {
  align-items: end;
  justify-content: space-between;
  gap: 16px;
}

.table-card {
  scroll-margin-top: 76px;
}

.filter-cluster {
  display: grid;
  gap: 7px;
}

.filter-label {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.piece-filters .chip:nth-child(1) {
  --chip-color: var(--piece-noun);
}

.piece-filters .chip:nth-child(2) {
  --chip-color: var(--piece-connector);
}

.piece-filters .chip:nth-child(3) {
  --chip-color: var(--piece-modifier);
}

.piece-filters .chip:nth-child(4) {
  --chip-color: var(--piece-verb);
}

.piece-filters .chip.active {
  border-color: var(--chip-color);
  background: var(--chip-color);
}

.stat[data-piece] {
  border-top: 3px solid var(--piece-color);
  background: linear-gradient(150deg, #fff, var(--piece-soft));
}

.badge[data-piece] {
  color: var(--piece-color);
  background: var(--piece-soft);
}

.mobile-card-pattern {
  display: block;
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(25, 112, 141, 0.08);
  font-size: 0.86rem;
  font-weight: 800;
}

.piece-usage {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
  padding: 16px;
  border: 1px solid rgba(25, 112, 141, 0.2);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(232, 246, 249, 0.72), rgba(255, 255, 255, 0.9));
}

.piece-usage-label {
  color: var(--piece-connector);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.piece-usage > strong {
  font-size: 1.05rem;
  line-height: 1.45;
}

.piece-usage p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.piece-usage .piece-caution {
  padding: 10px 12px;
  border-left: 3px solid #d19a32;
  border-radius: 0 10px 10px 0;
  color: #6a4a0c;
  background: #fff7df;
}

.partner-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

.partner-row > span {
  margin-right: 2px;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 800;
}

.partner-row b {
  padding: 5px 8px;
  border: 1px solid rgba(31, 41, 55, 0.1);
  border-radius: 999px;
  background: white;
  font-size: 0.78rem;
}

.piece-guide-card:focus-visible,
.piece-map-head a:focus-visible,
.recipe-tabs button:focus-visible {
  outline: 3px solid rgba(25, 112, 141, 0.35);
  outline-offset: 3px;
}

@media (max-width: 900px) {
  .piece-guide-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .piece-guide-card {
    min-height: 210px;
  }

  .category-bar {
    align-items: stretch;
  }

  .filter-cluster:first-child {
    flex: 1 1 100%;
  }
}

@media (max-width: 768px) {
  .piece-map-card {
    gap: 16px;
    padding: 18px 14px;
    border-radius: 20px;
  }

  .piece-map-head,
  .recipe-lab-head {
    display: grid;
  }

  .piece-map-head a {
    width: fit-content;
  }

  .piece-guide-grid {
    gap: 8px;
  }

  .piece-guide-card {
    min-height: 184px;
    gap: 5px;
    padding: 14px 12px;
    border-radius: 16px;
  }

  .piece-guide-card strong {
    font-size: 1rem;
  }

  .piece-guide-copy {
    display: -webkit-box;
    overflow: hidden;
    font-size: 0.76rem;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .piece-guide-sample {
    overflow: hidden;
    font-size: 0.75rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .recipe-lab {
    padding: 16px 14px;
  }

  .recipe-tabs {
    justify-content: flex-start;
  }

  .recipe-tabs button {
    width: 44px;
    height: 44px;
  }

  .category-bar {
    display: grid;
  }

  .filter-cluster,
  .filters,
  .filters .chip:last-child {
    grid-column: auto;
  }

  .piece-filters,
  .expression-filters {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .examples-panel {
    scroll-margin-top: 12px;
  }

  .progress-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
  }

  .progress-actions > .progress-button,
  .mastery-controls {
    width: 100%;
  }

  .mastery-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mastery-controls .progress-button {
    width: 100%;
    white-space: nowrap;
  }
}

@media (max-width: 420px) {
  .piece-guide-card {
    min-height: 170px;
  }

  .piece-guide-symbol {
    font-size: 0.72rem;
  }

  .piece-guide-count {
    font-size: 0.7rem;
  }

  .recipe-pieces {
    gap: 5px;
  }

  .recipe-pieces span {
    padding: 7px 9px;
    font-size: 0.86rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .piece-guide-card {
    transition: none;
  }

  .piece-guide-card:hover,
  .piece-guide-card.active {
    transform: none;
  }
}