.subject-actions button[data-start="memorize"] {
  border-color: rgba(12, 143, 140, 0.42);
  background: #f0faf8;
  color: #08746f;
}

.question-selector {
  position: fixed;
  z-index: 30;
  top: 142px;
  left: 0;
  display: flex;
  align-items: flex-start;
  transform: translateX(calc(-100% + 40px));
  transition: transform 220ms ease;
}

.question-selector.is-open {
  transform: translateX(0);
}

.selector-panel {
  display: flex;
  width: min(310px, calc(100vw - 48px));
  max-height: var(--selector-panel-max-height, calc(100vh - 220px));
  flex-direction: column;
  overflow: hidden;
  border: 1px solid rgba(18, 60, 105, 0.13);
  border-left: 0;
  border-radius: 0 18px 18px 0;
  background: rgba(255, 253, 248, 0.98);
  box-shadow: 14px 18px 42px rgba(17, 53, 84, 0.18);
  backdrop-filter: blur(18px);
}

.selector-toggle {
  display: flex;
  width: 40px;
  min-height: 84px;
  margin-top: 18px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  border: 1px solid rgba(18, 60, 105, 0.14);
  border-left: 0;
  border-radius: 0 14px 14px 0;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: none;
  color: rgba(8, 43, 82, 0.55);
  cursor: grab;
  opacity: 0.68;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    opacity 160ms ease;
}

.selector-toggle:hover,
.selector-toggle:focus-visible {
  border-color: rgba(18, 60, 105, 0.3);
  background: rgba(255, 255, 255, 0.72);
  color: rgba(8, 43, 82, 0.9);
  opacity: 1;
}

.selector-toggle.is-dragging {
  cursor: grabbing;
  opacity: 0.42;
}

.selector-toggle span {
  writing-mode: vertical-rl;
  letter-spacing: 0.12em;
  font-size: 13px;
  font-weight: 800;
}

.selector-toggle b {
  font-family: Georgia, serif;
  font-size: 22px;
  line-height: 1;
}

.selector-heading {
  display: flex;
  padding: 18px 18px 14px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.selector-heading > div {
  display: flex;
  flex-direction: column;
}

.selector-heading strong {
  font-size: 18px;
}

.selector-heading span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
}

.selector-heading button {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: #edf2f5;
  color: var(--muted);
  cursor: pointer;
  font-size: 22px;
}

.selector-legend {
  display: flex;
  gap: 14px;
  padding: 10px 16px 0;
  color: var(--muted);
  font-size: 11px;
}

.selector-legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.selector-legend i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.selector-legend i.is-done {
  background: #2f9b68;
}

.selector-legend i.is-wrong {
  background: #d85858;
}

.selector-groups {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 4px 14px 18px;
}

.selector-group {
  padding-top: 15px;
}

.selector-group-title {
  display: flex;
  margin-bottom: 9px;
  align-items: baseline;
  justify-content: space-between;
}

.selector-group-title strong {
  font-size: 13px;
}

.selector-group-title span {
  color: var(--muted);
  font-size: 11px;
}

.question-number-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 7px;
}

.question-number-grid button {
  min-width: 0;
  height: 38px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: white;
  color: var(--ink);
  cursor: pointer;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.question-number-grid button:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.question-number-grid button.is-done {
  border-color: #74c69a;
  background: #eaf8f0;
  color: #24734f;
  font-weight: 750;
}

.question-number-grid button.is-wrong {
  border-color: #e58a8a;
  background: #fff0f0;
  color: #b93636;
  font-weight: 750;
}

.question-number-grid button.is-current {
  border-color: var(--teal);
  font-weight: 800;
  box-shadow: 0 0 0 2px rgba(12, 143, 140, 0.22);
}

.question-number-grid button.is-current:not(.is-done):not(.is-wrong) {
  background: var(--teal);
  color: white;
}

.selector-scrim {
  position: fixed;
  z-index: 29;
  inset: 0;
  background: rgba(8, 43, 82, 0.16);
  cursor: default;
}

.memorize-choice {
  cursor: default;
  pointer-events: none;
}

.memorize-choice:not(.correct) {
  background: #f8fafb;
  color: #71808e;
}

.memorize-panel {
  border: 1px solid #a8d8d2;
  background: #eef9f7;
}

.memorize-panel .result-title {
  color: #08746f;
}

.memorize-panel .result-title > span {
  width: 30px;
  height: 30px;
  background: var(--teal);
  color: white;
  font-size: 12px;
}

.memorize-actions {
  display: grid;
  width: min(760px, 100%);
  margin: 0 auto;
  grid-template-columns: 150px 1fr;
  gap: 10px;
}

.memorize-actions .primary-button {
  width: 100%;
}

.secondary-button {
  min-height: 54px;
  border: 1px solid rgba(18, 60, 105, 0.18);
  border-radius: 16px;
  background: white;
  color: var(--navy);
  cursor: pointer;
  font-weight: 800;
}

.secondary-button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

@media (width <= 680px) {
  .subject-actions {
    gap: 6px;
  }

  .subject-actions button {
    padding: 0 8px;
    font-size: 12px;
  }

  .question-selector {
    top: 106px;
  }

  .selector-panel {
    max-height: calc(100vh - 176px);
  }

  .selector-scrim {
    background: rgba(8, 43, 82, 0.24);
  }

  .memorize-actions {
    grid-template-columns: 92px 1fr;
    gap: 8px;
  }
}