.smk-app {
  --smk-border: #d8dde6;
  --smk-text: #182230;
  --smk-muted: #667085;
  --smk-accent: #1f7a8c;
  --smk-accent-dark: #145868;
  --smk-error: #b42318;
  --smk-correct: #087443;
  color: var(--smk-text);
  font-family: inherit;
  max-width: 820px;
  margin: 24px auto;
}

.smk-topbar {
  border-bottom: 1px solid var(--smk-border);
  margin-bottom: 20px;
  padding-bottom: 14px;
}

.smk-title {
  font-size: 28px;
  line-height: 1.15;
  margin: 0 0 4px;
}

.smk-field span,
.smk-metrics span {
  color: var(--smk-muted);
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.smk-layout {
  display: grid;
  gap: 20px;
}

.smk-layout[hidden],
.smk-auth[hidden] {
  display: none;
}

.smk-auth {
  border: 1px solid var(--smk-border);
  border-radius: 8px;
  display: grid;
  gap: 16px;
  padding: 16px;
}

.smk-auth-tabs {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr 1fr;
}

.smk-auth-tab {
  appearance: none;
  background: #fff;
  border: 1px solid var(--smk-border);
  border-radius: 6px;
  color: var(--smk-accent-dark);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  min-height: 42px;
  padding: 8px 12px;
}

.smk-auth-tab-active {
  background: var(--smk-accent);
  border-color: var(--smk-accent);
  color: #fff;
}

.smk-auth-grid {
  display: grid;
  gap: 12px;
}

.smk-auth-status {
  color: var(--smk-muted);
  font-size: 13px;
  line-height: 1.45;
  margin: 0;
}

.smk-board-panel {
  min-width: 0;
}

.smk-controls,
.smk-results {
  display: grid;
  gap: 16px;
}

.smk-playerbar {
  align-items: center;
  border: 1px solid var(--smk-border);
  border-radius: 6px;
  display: flex;
  gap: 10px;
  justify-content: space-between;
  min-height: 42px;
  padding: 8px 10px;
}

.smk-link-button {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--smk-accent-dark);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 4px 0;
}

.smk-status {
  color: var(--smk-muted);
  font-size: 14px;
  min-height: 22px;
  margin-bottom: 10px;
}

.smk-board {
  aspect-ratio: 1;
  border: 2px solid var(--smk-text);
  box-sizing: border-box;
  display: grid;
  grid-auto-rows: minmax(0, 1fr);
  grid-template-columns: repeat(9, minmax(0, 1fr));
  grid-template-rows: repeat(9, minmax(0, 1fr));
  margin: 0 auto;
  max-width: 640px;
  overflow: hidden;
  width: 100%;
}

.smk-cell {
  align-items: center;
  appearance: none;
  aspect-ratio: 1 / 1;
  background: #fff;
  border: 1px solid var(--smk-border);
  box-sizing: border-box;
  color: var(--smk-text);
  display: flex;
  font-size: clamp(18px, 5vw, 34px);
  font-weight: 700;
  justify-content: center;
  line-height: 1;
  max-height: 100%;
  max-width: 100%;
  min-height: 0;
  min-width: 0;
  padding: 0;
}

.smk-cell:nth-child(3n) {
  border-right-color: var(--smk-text);
}

.smk-cell:nth-child(n + 19):nth-child(-n + 27),
.smk-cell:nth-child(n + 46):nth-child(-n + 54) {
  border-bottom-color: var(--smk-text);
}

.smk-cell:nth-child(9n) {
  border-right-color: var(--smk-border);
}

.smk-cell-given {
  background: #f2f5f7;
  color: #111827;
}

.smk-cell-selected {
  background: #d9eef2;
  outline: 3px solid var(--smk-accent);
  outline-offset: -3px;
}

.smk-cell-match {
  background: #fff2c2;
}

.smk-cell-selected.smk-cell-match {
  background: #f9df88;
}

.smk-cell-error {
  color: var(--smk-error);
}

.smk-cell-correct {
  color: var(--smk-correct);
}

.smk-pad {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 14px auto 0;
  max-width: 640px;
  width: 100%;
}

.smk-pad-button,
.smk-button {
  appearance: none;
  background: var(--smk-accent);
  border: 1px solid var(--smk-accent);
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  min-height: 42px;
  padding: 8px 12px;
}

.smk-pad-button:hover,
.smk-button:hover {
  background: var(--smk-accent-dark);
}

.smk-pad-button-selected {
  background: #f2b84b;
  border-color: #b7791f;
  color: #111827;
}

.smk-pad-button-selected:hover {
  background: #e3a32d;
}

.smk-button-secondary {
  background: #fff;
  color: var(--smk-accent-dark);
}

.smk-button-secondary:hover {
  background: #eef7f9;
}

.smk-field input,
.smk-field select {
  border: 1px solid var(--smk-border);
  border-radius: 6px;
  box-sizing: border-box;
  font: inherit;
  margin-top: 6px;
  min-height: 42px;
  padding: 8px 10px;
  width: 100%;
}

.smk-metrics {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, 1fr);
}

.smk-metrics div {
  border: 1px solid var(--smk-border);
  border-radius: 6px;
  padding: 10px;
}

.smk-metrics strong {
  display: block;
  font-size: 20px;
  line-height: 1.2;
}

.smk-actions {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
}

.smk-options {
  display: grid;
  gap: 10px;
}

.smk-option-row {
  align-items: stretch;
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr 42px;
}

.smk-toggle {
  align-items: center;
  border: 1px solid var(--smk-border);
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  gap: 10px;
  min-height: 42px;
  padding: 8px 10px;
}

.smk-help-button {
  appearance: none;
  background: #fff;
  border: 1px solid var(--smk-border);
  border-radius: 999px;
  color: var(--smk-accent-dark);
  cursor: pointer;
  font: inherit;
  font-size: 18px;
  font-weight: 800;
  min-height: 42px;
  padding: 0;
}

.smk-help-button:hover {
  background: #eef7f9;
}

.smk-toggle input {
  accent-color: var(--smk-accent);
  flex: 0 0 auto;
  height: 18px;
  width: 18px;
}

.smk-toggle span {
  color: var(--smk-text);
  font-size: 14px;
  font-weight: 700;
}

.smk-scores {
  border-top: 1px solid var(--smk-border);
  padding-top: 14px;
}

.smk-scores h3 {
  font-size: 18px;
  margin: 0 0 10px;
}

.smk-scores ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 22px;
}

.smk-scores li span {
  color: var(--smk-muted);
  display: block;
  font-size: 13px;
}

.smk-score-help {
  border-top: 1px solid var(--smk-border);
  color: var(--smk-muted);
  font-size: 12px;
  line-height: 1.45;
  margin: 0;
  padding-top: 12px;
}

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

.smk-modal {
  align-items: center;
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  inset: 0;
  justify-content: center;
  padding: 20px;
  position: fixed;
  z-index: 99999;
}

.smk-modal-dialog {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.25);
  max-width: 420px;
  padding: 22px;
  position: relative;
  width: min(100%, 420px);
}

.smk-modal-dialog h3 {
  font-size: 20px;
  margin: 0 36px 10px 0;
}

.smk-modal-dialog p {
  color: var(--smk-muted);
  font-size: 15px;
  line-height: 1.5;
  margin: 0;
}

.smk-modal-close {
  appearance: none;
  background: #fff;
  border: 1px solid var(--smk-border);
  border-radius: 999px;
  color: var(--smk-text);
  cursor: pointer;
  font: inherit;
  font-size: 22px;
  height: 34px;
  line-height: 1;
  padding: 0;
  position: absolute;
  right: 14px;
  top: 14px;
  width: 34px;
}

.smk-modal-open {
  overflow: hidden;
}

@media (max-width: 760px) {
  .smk-app {
    margin: 18px auto;
    padding: 0 12px;
  }

  .smk-title {
    font-size: 32px;
  }

  .smk-layout {
    gap: 18px;
  }
}