:root {
  --sdk-cell-line: var(--ud-line);
  --sdk-box-line: rgba(154, 119, 255, 0.6);
  --sdk-selected: rgba(122, 76, 242, 0.22);
  --sdk-selected-glow: rgba(154, 119, 255, 0.11);
  --sdk-hover: rgba(154, 119, 255, 0.075);
  --sdk-related: rgba(245, 243, 239, 0.045);
  --sdk-match: rgba(154, 119, 255, 0.13);
  --sdk-error: #ef806d;
}

.sdk-main {
  min-height: max(100svh, 50rem);
}

.sdk-main__grid {
  padding-top: clamp(2.4rem, 4.3vw, 4.8rem);
  padding-bottom: clamp(3rem, 5vw, 5rem);
}

.sdk-intro {
  grid-column: 1 / 6;
  max-width: 36rem;
}

.sdk-intro h1 {
  font-size: clamp(4.4rem, 8.3vw, 8.7rem);
}

.sdk-intro-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.sdk-intro-meta > span {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.5rem;
  color: rgba(243, 234, 216, 0.62);
  font-family: var(--pd-data);
  font-size: 0.54rem;
  letter-spacing: 0.055em;
  line-height: 1.4;
  text-transform: uppercase;
}

.sdk-intro-meta i {
  display: block;
  width: 0.48rem;
  height: 0.48rem;
  flex: 0 0 auto;
  background: var(--pd-accent);
  transform: rotate(45deg);
}

.sdk-intro-meta > span:last-child i {
  border: 1px solid var(--pd-accent-bright);
  background: transparent;
}

.sdk-intro-meta b {
  color: var(--pd-cream);
  font-weight: 500;
}

.sdk-play {
  grid-column: 6 / 13;
  width: min(100%, 43rem);
  padding: clamp(1rem, 2.15vw, 1.8rem);
}

.sdk-play__header {
  margin-bottom: 0.8rem;
}

.sdk-status-line {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 0.9rem;
  border-top: 1px solid var(--pd-line);
  border-bottom: 1px solid var(--pd-line);
}

.sdk-status-line > span {
  min-width: 0;
  padding: 0.58rem 0.5rem;
  border-right: 1px solid var(--pd-line);
  color: rgba(243, 234, 216, 0.54);
  font-family: var(--pd-data);
  font-size: 0.49rem;
  letter-spacing: 0.045em;
  text-align: center;
  text-transform: uppercase;
}

.sdk-status-line > span:last-child {
  border-right: 0;
}

.sdk-status-line b {
  color: var(--pd-cream);
  font-size: 0.57rem;
  font-weight: 500;
}

.sdk-board-wrap {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 100%;
}

.sdk-board {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  width: min(100%, 35rem);
  aspect-ratio: 1;
  border-right: 2px solid var(--sdk-box-line);
  border-bottom: 2px solid var(--sdk-box-line);
  background:
    linear-gradient(145deg, rgba(243, 234, 216, 0.025), transparent 54%),
    rgba(8, 6, 4, 0.46);
  box-shadow:
    0 24px 65px rgba(0, 0, 0, 0.24),
    inset 0 0 55px rgba(0, 0, 0, 0.16);
  outline: 0;
}

.sdk-cell {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 0;
  place-items: center;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-top: 1px solid var(--sdk-cell-line);
  border-left: 1px solid var(--sdk-cell-line);
  border-radius: 0;
  background: transparent;
  color: var(--pd-accent);
  font-family: var(--pd-font);
  font-size: clamp(1rem, 2.35vw, 1.48rem);
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  user-select: none;
  transition:
    background-color 130ms ease,
    color 130ms ease,
    box-shadow 130ms ease;
}

.sdk-cell[data-row="0"],
.sdk-cell[data-row="2"],
.sdk-cell[data-row="4"] {
  border-top: 2px solid var(--sdk-box-line);
}

.sdk-cell[data-column="0"],
.sdk-cell[data-column="3"] {
  border-left: 2px solid var(--sdk-box-line);
}

.sdk-cell:hover {
  background: var(--sdk-hover);
}

.sdk-cell.is-related {
  background: var(--sdk-related);
}

.sdk-cell.is-match {
  background: var(--sdk-match);
  color: var(--pd-accent-bright);
}

.sdk-cell.is-selected {
  z-index: 2;
  background:
    linear-gradient(145deg, var(--sdk-selected-glow), transparent 64%),
    var(--sdk-selected);
  box-shadow: inset 0 0 0 2px var(--pd-accent);
}

.sdk-cell.is-clue {
  color: var(--pd-cream);
  font-weight: 720;
}

.sdk-cell.is-player {
  color: var(--pd-accent);
}

.sdk-cell.is-hint {
  color: var(--pd-accent-bright);
}

.sdk-cell.is-error {
  background:
    linear-gradient(145deg, rgba(239, 128, 109, 0.15), transparent 66%),
    rgba(91, 31, 25, 0.28);
  color: var(--sdk-error);
  box-shadow: inset 0 -2px 0 rgba(239, 128, 109, 0.7);
}

.sdk-cell.is-error.is-selected {
  box-shadow:
    inset 0 0 0 2px var(--sdk-error),
    inset 0 -3px 0 rgba(239, 128, 109, 0.8);
}

.sdk-cell:focus-visible {
  z-index: 3;
  outline: 2px solid var(--pd-accent-bright);
  outline-offset: -3px;
}

.sdk-notes-grid {
  position: absolute;
  inset: 8%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  align-items: center;
  justify-items: center;
  color: rgba(243, 234, 216, 0.69);
  font-family: var(--pd-data);
  font-size: clamp(0.38rem, 0.85vw, 0.54rem);
  font-weight: 500;
  line-height: 1;
}

.sdk-notes-grid span {
  opacity: 0;
}

.sdk-notes-grid span.is-set {
  opacity: 1;
}

.sdk-number-pad {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: clamp(0.25rem, 0.7vw, 0.48rem);
  width: min(100%, 35rem);
  margin: 0.9rem auto 0;
}

.sdk-number-pad button {
  display: grid;
  min-width: 0;
  min-height: 45px;
  place-items: center;
  margin: 0;
  padding: 0.3rem;
  border: 1px solid rgba(243, 234, 216, 0.16);
  border-radius: 0;
  background: rgba(243, 234, 216, 0.035);
  color: var(--pd-cream);
  font-family: var(--pd-data);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition:
    border-color 150ms ease,
    background-color 150ms ease,
    color 150ms ease,
    transform 150ms ease;
}

.sdk-number-pad button:hover,
.sdk-number-pad button.is-match {
  border-color: var(--pd-accent-bright);
  background: var(--sdk-selected-glow);
  color: var(--pd-accent-bright);
}

.sdk-number-pad button:active {
  transform: translateY(1px);
}

.sdk-number-pad button.is-placed {
  color: rgba(243, 234, 216, 0.3);
}

.sdk-tool-row {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
  width: min(100%, 35rem);
  margin: 0.58rem auto 0;
}

.sdk-tool {
  display: flex;
  min-width: 0;
  min-height: 46px;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin: 0;
  padding: 0.65rem 0.8rem;
  border: 1px solid rgba(243, 234, 216, 0.15);
  border-radius: 0;
  background: rgba(243, 234, 216, 0.03);
  color: rgba(243, 234, 216, 0.74);
  font-family: var(--pd-data);
  font-size: 0.54rem;
  letter-spacing: 0.065em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    color 160ms ease;
}

.sdk-tool small {
  color: rgba(243, 234, 216, 0.4);
  font: inherit;
}

.sdk-tool:hover,
.sdk-tool[aria-pressed="true"] {
  border-color: var(--pd-accent-bright);
  background: var(--sdk-selected-glow);
  color: var(--pd-accent-bright);
}

.sdk-tool[aria-pressed="true"] small {
  color: var(--pd-accent-bright);
}

.sdk-tool:disabled,
.sdk-number-pad button:disabled {
  cursor: default;
  opacity: 0.44;
}

.sdk-feedback {
  min-height: 1.25rem;
  margin: 0.8rem auto 0;
  color: rgba(243, 234, 216, 0.55);
  font-family: var(--pd-data);
  font-size: 0.52rem;
  letter-spacing: 0.045em;
  text-align: center;
  text-transform: uppercase;
}

.sdk-feedback.is-error {
  color: var(--sdk-error);
}

.sdk-feedback.is-positive {
  color: var(--pd-accent-bright);
}

.sdk-result-stats {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.sdk-result-stats > div:nth-child(3) {
  border-right: 1px solid var(--pd-line);
}

.sdk-how-list {
  display: grid;
  margin-top: 1.8rem;
  border-top: 1px solid var(--pd-line);
}

.sdk-how-list > span {
  min-height: 4.25rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--pd-line);
  color: rgba(243, 234, 216, 0.65);
  font-size: 0.76rem;
  line-height: 1.55;
}

.sdk-how-list b {
  display: inline-block;
  min-width: 4rem;
  color: var(--pd-cream);
  font-weight: 650;
}

.sdk-name-score {
  margin: 0 0 1.3rem !important;
}

.sdk-name-input {
  width: 100%;
  min-height: 52px;
  margin: 1.5rem 0 0.7rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--pd-accent);
  border-radius: 0;
  outline: 0;
  background: rgba(9, 7, 5, 0.36);
  color: var(--pd-cream);
  font: 600 1rem/1.2 var(--pd-font);
}

.sdk-name-input::placeholder {
  color: rgba(243, 234, 216, 0.38);
}

.sdk-name-input:focus {
  border-color: var(--pd-accent-bright);
}

#sdk-name-submit {
  width: 100%;
}

#sdk-name-skip {
  display: block;
  margin: 0.6rem auto 0;
}

.sdk-page .lb-row--top3,
.sdk-page .lb-row--rest {
  grid-template-columns: 2.4rem minmax(0, 1fr) auto;
}


@media (max-width: 1120px) {
  .sdk-main__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 4rem 1rem;
  }

  .sdk-intro {
    grid-column: 1 / 5;
  }

  .sdk-play {
    grid-column: 5 / 13;
  }

  .sdk-intro h1 {
    font-size: clamp(3.9rem, 8vw, 6.5rem);
  }
}

@media (min-width: 901px) and (max-height: 820px) {
  .sdk-main__grid {
    padding-top: 1.35rem;
    padding-bottom: 1.8rem;
  }

  .sdk-play {
    padding: 0.95rem;
  }

  .sdk-play__header {
    margin-bottom: 0.5rem;
    padding-bottom: 0.65rem;
  }

  .sdk-status-line {
    margin-bottom: 0.5rem;
  }

  .sdk-board,
  .sdk-number-pad,
  .sdk-tool-row {
    width: min(100%, 27rem);
  }

  .sdk-number-pad {
    margin-top: 0.52rem;
  }

  .sdk-tool-row {
    margin-top: 0.38rem;
  }

  .sdk-feedback {
    margin-top: 0.42rem;
  }
}

@media (max-width: 900px) {
  .sdk-main__grid {
    display: grid;
    grid-template-columns: 1fr;
    align-items: start;
    gap: 3.5rem;
    padding-top: 3rem;
  }

  .sdk-intro,
  .sdk-play {
    grid-column: 1;
    justify-self: center;
    width: min(100%, 43rem);
    max-width: 43rem;
  }

  .sdk-intro__topline {
    margin-bottom: 2.7rem;
  }

  .sdk-intro h1 {
    font-size: clamp(4rem, 14vw, 7.2rem);
  }

  .sdk-intro__lede {
    margin-top: 2rem;
  }

  .sdk-intro__rule {
    margin-top: 2rem;
  }
}

@media (max-width: 700px) {
  .sdk-main__grid {
    gap: 2.5rem;
    padding-top: 2.2rem;
  }

  .sdk-intro h1 {
    font-size: clamp(3.75rem, 18vw, 5.6rem);
  }

  .sdk-play {
    width: calc(100% + 0.1rem);
    padding: 0.9rem;
  }

  .sdk-play__header {
    margin-bottom: 0.65rem;
    padding-bottom: 0.75rem;
  }

  .sdk-status-line {
    margin-bottom: 0.7rem;
  }

  .sdk-status-line > span {
    padding-inline: 0.2rem;
    font-size: 0.43rem;
    letter-spacing: 0.025em;
  }

  .sdk-status-line b {
    font-size: 0.52rem;
  }

  .sdk-board {
    width: 100%;
  }

  .sdk-cell {
    font-size: clamp(1.05rem, 6vw, 1.45rem);
  }

  .sdk-notes-grid {
    inset: 5%;
    font-size: clamp(0.36rem, 2.4vw, 0.55rem);
  }

  .sdk-number-pad,
  .sdk-tool-row {
    width: 100%;
  }

  .sdk-number-pad {
    gap: 0.2rem;
    margin-top: 0.65rem;
  }

  .sdk-number-pad button {
    min-height: 44px;
    padding-inline: 0;
    font-size: 0.74rem;
  }

  .sdk-tool-row {
    gap: 0.35rem;
  }

  .sdk-tool {
    padding-inline: 0.55rem;
    font-size: 0.49rem;
  }

  .sdk-feedback {
    margin-top: 0.65rem;
    font-size: 0.47rem;
  }

  .sdk-result-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sdk-result-stats > div:nth-child(2) {
    border-right: 0;
  }

  .sdk-result-stats > div:nth-child(-n + 2) {
    border-bottom: 1px solid var(--pd-line);
  }

  .sdk-result-stats > div:nth-child(3) {
    border-right: 1px solid var(--pd-line);
  }
}

@media (max-width: 420px) {
  .sdk-intro-meta {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .sdk-intro-meta > span {
    min-height: 2rem;
  }

  .sdk-play {
    margin-inline: -0.25rem;
    width: calc(100% + 0.5rem);
    padding: 0.72rem;
  }

  .sdk-cell {
    font-size: 1.05rem;
  }

  .sdk-number-pad button {
    min-height: 42px;
    font-size: 0.69rem;
  }

  .sdk-tool span,
  .sdk-tool small {
    font-size: 0.46rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sdk-cell,
  .sdk-number-pad button,
  .sdk-tool {
    transition: none;
  }
}