/* =========================================================
   SquiggleMath — generator page extras
   ========================================================= */

.studio-page {
  position: relative;
  padding-top: 60px;
}

.studio-page::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 10% 40%, rgba(255, 195, 225, 0.26), transparent 42%),
    radial-gradient(ellipse at 90% 60%, rgba(184, 242, 216, 0.3), transparent 42%);
  pointer-events: none;
}

.studio-page__head {
  text-align: center;
  margin-bottom: 34px;
}

.studio-page__head h1 {
  font-size: clamp(2.1rem, 4vw, 3.35rem);
  margin-bottom: 12px;
}

.studio-page__head .section-lede {
  margin-inline: auto;
}

.studio--page {
  grid-template-columns: 390px minmax(0, 1fr);
}

.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.field-label-row .field-label {
  margin-bottom: 0;
}

/* activity picker */
.activity-picker {
  max-height: 360px;
  overflow-y: auto;
  padding: 6px;
  border: 2px solid rgba(31, 42, 68, 0.08);
  border-radius: 14px;
  background: #fff;
}

.activity-group {
  margin-bottom: 12px;
}

.activity-group:last-child {
  margin-bottom: 0;
}

.activity-group__label {
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.activity-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.activity-tile {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  padding: 9px 11px;
  border: 2px solid rgba(31, 42, 68, 0.1);
  border-radius: 12px;
  background: #fff;
  text-align: left;
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s var(--ease-bounce);
}

.activity-tile:hover {
  transform: translateX(2px);
  border-color: rgba(31, 42, 68, 0.3);
}

.activity-tile.is-active {
  border-color: var(--ink);
  background: var(--yellow);
  box-shadow: 0 3px 0 rgba(31, 42, 68, 0.15);
}

.activity-tile__icon {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: none;
  border-radius: 9px;
  background: var(--cream);
  font-size: 1.05rem;
  line-height: 1;
}

.activity-tile.is-active .activity-tile__icon {
  background: rgba(255, 255, 255, 0.6);
}

.activity-tile__text {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
  line-height: 1.2;
}

.activity-tile__text strong {
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-weight: 600;
}

.activity-tile__text small {
  margin-top: 2px;
  font-size: 0.66rem;
  font-weight: 600;
  color: var(--ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.activity-tile.is-active .activity-tile__text small {
  color: rgba(31, 42, 68, 0.7);
}

/* theme picker */
.theme-search-wrap {
  margin-bottom: 8px;
}

.theme-search-wrap input {
  width: 100%;
  height: 40px;
  padding: 0 14px;
  border: 2px solid rgba(31, 42, 68, 0.14);
  border-radius: 12px;
  background: #fff;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink);
  outline: 0;
  transition: border-color 0.18s ease;
}

.theme-search-wrap input:focus {
  border-color: var(--ink);
}

.theme-picker {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  max-height: 260px;
  overflow-y: auto;
  padding: 6px;
  border: 2px solid rgba(31, 42, 68, 0.08);
  border-radius: 14px;
  background: #fff;
}

.theme-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 4px;
  border: 2px solid transparent;
  border-radius: 11px;
  background: transparent;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s var(--ease-bounce);
}

.theme-tile:hover {
  background: var(--cream);
  transform: translateY(-2px);
}

.theme-tile.is-active {
  border-color: var(--ink);
  background: var(--yellow);
}

.theme-tile__emoji {
  font-size: 1.35rem;
  line-height: 1;
}

.theme-tile__name {
  font-family: var(--font-display);
  font-size: 0.62rem;
  font-weight: 600;
  line-height: 1.1;
  text-align: center;
  color: var(--ink-soft);
}

.theme-tile.is-active .theme-tile__name {
  color: var(--ink);
}

.picker-empty {
  grid-column: 1 / -1;
  padding: 16px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--ink-faint);
}

.generate-actions {
  display: grid;
  gap: 8px;
}

/* worksheet: new content styles */
.answer-box {
  display: inline-block;
  width: 34px;
  height: 26px;
  border: 1.5px solid rgba(31, 42, 68, 0.35);
  border-radius: 6px;
  background: #fff;
  vertical-align: middle;
}

.answer-box--small {
  width: 22px;
  height: 18px;
}

.answer-box--wide {
  width: 62px;
  height: 26px;
}

/* patterns */
.pattern-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pattern-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.pattern-row__num {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  flex: none;
  border-radius: 50%;
  background: var(--ws-accent-soft);
  font-family: var(--font-display);
  font-size: 9.5px;
  font-weight: 600;
}

.pattern-row__seq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.pattern-symbol {
  font-size: 22px;
  line-height: 1;
}

.pattern-blank {
  display: inline-block;
  width: 30px;
  height: 30px;
  border: 2px dashed var(--ws-accent);
  border-radius: 7px;
  background: var(--ws-accent-soft);
  vertical-align: middle;
}

/* sort */
.sort-pile {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  padding: 10px 12px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
  font-size: 20px;
  line-height: 1.4;
}

.sort-tally {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.sort-tally__item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 9px;
  background: #fffdfa;
  font-size: 12px;
  font-weight: 600;
}

.sort-tally__label {
  flex: 1;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ten-frame */
.tenframe-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.tenframe-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.tenframe-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.ten-frame {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 3px;
  width: 100%;
  max-width: 150px;
}

.ten-frame span {
  aspect-ratio: 1;
  border: 1.5px solid rgba(31, 42, 68, 0.35);
  border-radius: 4px;
  background: #fff;
}

.ten-frame span.is-filled {
  background: var(--ws-accent);
  border-color: var(--ws-accent);
}

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

.dice-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.dice-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.dice-card__num {
  align-self: flex-start;
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--ws-accent-soft);
  font-family: var(--font-display);
  font-size: 9px;
  font-weight: 600;
}

.dice-pair {
  display: flex;
  align-items: center;
  gap: 6px;
}

.die {
  width: 40px;
  height: 40px;
  color: var(--ink);
}

.dice-grid--dense .die {
  width: 32px;
  height: 32px;
}

/* picture equations */
.picture-eq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.picture-eq-grid--dense {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.picture-eq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  min-height: 52px;
  padding: 8px 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
}

.picture-eq-grid--dense .picture-eq {
  font-size: 15px;
  min-height: 44px;
}

.picture-eq__group {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  max-width: 150px;
  line-height: 1.1;
}

.picture-eq__group .is-crossed {
  opacity: 0.28;
  filter: grayscale(1);
}

/* before/after */
.beforeafter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.beforeafter-grid--dense {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.beforeafter-card {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.beforeafter-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.beforeafter-label {
  font-size: 7.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.beforeafter-num {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--ws-accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
}

/* sequences */
.sequence-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sequence-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.sequence-row__num {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  flex: none;
  border-radius: 50%;
  background: var(--ws-accent-soft);
  font-family: var(--font-display);
  font-size: 9.5px;
  font-weight: 600;
}

.sequence-row__step {
  font-size: 8.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ws-accent);
}

.sequence-row__terms {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  flex: 1;
}

.sequence-term {
  display: grid;
  place-items: center;
  min-width: 30px;
  height: 28px;
  padding: 0 6px;
  border-radius: 7px;
  background: #fff;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
}

.sequence-blank {
  display: inline-block;
  width: 34px;
  height: 28px;
  border: 2px dashed var(--ws-accent);
  border-radius: 7px;
  background: var(--ws-accent-soft);
}

/* greater */
.greater-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.greater-grid--dense {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.greater-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 58px;
  padding: 8px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
}

.symbol-box {
  display: inline-block;
  width: 34px;
  height: 34px;
  border: 2px dashed var(--ws-accent);
  border-radius: 7px;
  background: var(--ws-accent-soft);
}

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

.place-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.place-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.place-blocks {
  display: flex;
  justify-content: center;
  min-height: 56px;
}

.base-ten {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.base-ten__tens {
  display: flex;
  gap: 4px;
  align-items: flex-end;
}

.base-ten__rod {
  display: block;
  width: 9px;
  height: 56px;
  border-radius: 3px;
  background: var(--ws-accent-soft);
  border: 1.5px solid var(--ws-accent);
  background-image: repeating-linear-gradient(to bottom, var(--ws-accent) 0 1px, transparent 1px 6px);
}

.base-ten__ones {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  max-width: 60px;
  align-content: flex-end;
}

.base-ten__unit {
  display: block;
  width: 11px;
  height: 11px;
  border-radius: 2px;
  background: var(--ws-accent);
  border: 1px solid var(--ws-accent);
}

.place-answer-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.place-label {
  font-size: 7.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ordinal */
.ordinal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.ordinal-grid--dense {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.ordinal-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.ordinal-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  padding: 6px;
  border-radius: 9px;
  background: var(--ws-accent-soft);
}

.ordinal-item {
  font-size: 24px;
  line-height: 1;
}

.ordinal-question {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink-soft);
}

/* number line */
.numberline-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.numberline-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px 8px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.numberline-card__num {
  align-self: flex-start;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--ws-accent-soft);
  font-family: var(--font-display);
  font-size: 9.5px;
  font-weight: 600;
}

.numberline-svg {
  width: 100%;
  height: 90px;
  color: var(--ink);
}

.numberline-question {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink-soft);
}

/* number words */
.word-bank {
  padding: 8px 12px;
  border: 1.5px dashed rgba(31, 42, 68, 0.24);
  border-radius: 9px;
  background: #fffdfa;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--ink-soft);
  line-height: 1.5;
}

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

.numberword-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.numberword-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.numberword-num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 9px;
  background: var(--ws-accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
}

/* place 100 */
.place100-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.place100-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.place100-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.place100-num {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  color: var(--ws-accent);
}

.place100-eq {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
}

/* even odd */
.evenodd-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.evenodd-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.evenodd-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.evenodd-num {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
}

.evenodd-choice {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* fractions */
.fraction-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.fraction-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.fraction-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.fraction-circle {
  display: block;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--ws-accent);
}

.fraction-rect {
  display: flex;
  width: 70px;
  height: 44px;
  border: 2px solid var(--ws-accent);
  border-radius: 6px;
  overflow: hidden;
}

.fraction-rect span {
  flex: 1;
  border-right: 1.5px solid var(--ws-accent);
  background: #fff;
}

.fraction-rect span:last-child {
  border-right: 0;
}

.fraction-rect span.is-shaded {
  background: var(--ws-accent);
}

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

.clock-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.clock-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.clock-svg {
  width: 86px;
  height: 86px;
  color: var(--ink);
}

.clock-grid--dense .clock-svg {
  width: 70px;
  height: 70px;
}

/* money */
.money-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.money-grid--dense {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.money-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.coin-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}

.coin {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 2px solid rgba(31, 42, 68, 0.3);
  font-family: var(--font-display);
  font-size: 8.5px;
  font-weight: 700;
  color: #fff;
}

.coin--1 { background: #c9a227; }
.coin--5 { background: #b5b5b5; }
.coin--10 { background: #d4af37; }
.coin--25 { background: #a8a8a8; }

/* fact family */
.factfamily-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.factfamily-grid--dense {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.factfamily-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.factfamily-triangle {
  position: relative;
  width: 120px;
  height: 90px;
}

.factfamily-top {
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--ws-accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
}

.factfamily-left,
.factfamily-right {
  position: absolute;
  bottom: 6px;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--ws-accent-soft);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
}

.factfamily-left { left: 14px; }
.factfamily-right { right: 14px; }

.factfamily-lines {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
}

.factfamily-line {
  display: block;
  height: 16px;
  border-bottom: 1.5px dotted rgba(31, 42, 68, 0.35);
}

/* vertical */
.vertical-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.vertical-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.vertical-problem {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  padding: 8px 12px 6px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
  position: relative;
}

.vertical-op {
  position: absolute;
  left: 14px;
  top: 18px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink-soft);
}

.vertical-num {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.1;
}

.vertical-rule {
  width: 100%;
  height: 2px;
  background: rgba(31, 42, 68, 0.3);
  margin-top: 2px;
}

.vertical-answer {
  width: 100%;
  height: 22px;
}

/* arrays */
.array-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.array-grid--dense {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.array-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.array-dots {
  display: grid;
  grid-template-columns: repeat(var(--array-cols, 4), 1fr);
  gap: 4px;
  justify-items: center;
  padding: 8px;
  border-radius: 8px;
  background: var(--ws-accent-soft);
}

.array-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ws-accent);
}

.array-equation {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink-soft);
}

.array-total {
  font-size: 9px;
  color: var(--ink-faint);
}

/* graph */
.graph-card {
  padding: 10px 12px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.graph-title {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 6px;
}

.graph-rows {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 8px;
}

.graph-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.graph-label {
  font-size: 18px;
  width: 22px;
  text-align: center;
}

.graph-pictures {
  font-size: 14px;
  letter-spacing: 1px;
  line-height: 1.2;
}

.graph-questions {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.graph-question {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  font-weight: 700;
  color: var(--ink-soft);
}

/* rounding */
.round-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.round-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.round-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.round-num {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
}

/* solid shapes */
.solid-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.solid-grid--dense {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.solid-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px;
  border: 1.5px solid rgba(31, 42, 68, 0.14);
  border-radius: 10px;
  background: #fffdfa;
}

.solid-svg {
  width: 62px;
  height: 62px;
  color: var(--ink);
}

.solid-grid--dense .solid-svg {
  width: 50px;
  height: 50px;
}

/* responsive */
@media (max-width: 980px) {
  .studio--page {
    grid-template-columns: 1fr;
  }

  .theme-picker {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (max-width: 620px) {
  .theme-picker {
    grid-template-columns: repeat(5, 1fr);
  }

  .activity-picker {
    max-height: 280px;
  }
}