/* The assessment scale is shared by cards, filters and study records. */
.rating-hard { --rating-bg: #fff0f1; --rating-ink: #b94857; --rating-line: #efbdc4; }
.rating-again { --rating-bg: #fff3ed; --rating-ink: #ad6244; --rating-line: #ebc6b7; }
.rating-unsure { --rating-bg: #fff8df; --rating-ink: #98751c; --rating-line: #e9d89b; }
.rating-good { --rating-bg: #edf4ff; --rating-ink: #2867ba; --rating-line: #b9d2f6; }
.rating-solid { --rating-bg: #e9f7f2; --rating-ink: #287b64; --rating-line: #b4dece; }
.rating-unseen { --rating-bg: #f0f3f7; --rating-ink: #6d798c; --rating-line: #d9e0e9; }

.assessment-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 5px 10px;
  border: 1px solid var(--rating-line, #d9e0e9);
  border-radius: 7px;
  background: var(--rating-bg, #f0f3f7);
  color: var(--rating-ink, #6d798c);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.6;
  white-space: nowrap;
}
.assessment-badge .rating-symbol { font-size: 16px; font-weight: 700; line-height: 1.3; }
.assessment-badge.rating-hard .rating-symbol { font-size: 12px; letter-spacing: -3px; margin-right: 3px; }
.assessment-buttons { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 10px; width: 100%; max-width: 740px; margin: 0 auto; }
.assessment-button {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 82px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 6px;
  border: 1px solid var(--rating-line, #d9e0e9);
  border-radius: 11px;
  background: var(--rating-bg, #f0f3f7);
  color: var(--rating-ink, #6d798c);
  box-shadow: 0 2px 3px #26334804;
}
.assessment-button:hover { border-color: var(--rating-ink, #6d798c); box-shadow: 0 3px 9px #2633480c; }
.assessment-button:active { transform: translateY(1px); box-shadow: none; }
.assessment-button[aria-pressed=true] { border-color: var(--rating-ink, #6d798c); box-shadow: 0 0 0 2px var(--rating-line, #d9e0e9); }
.assessment-button:disabled { cursor: default; }
.assessment-button:disabled:hover { border-color: var(--rating-line, #d9e0e9); box-shadow: 0 2px 3px #26334804; }
.assessment-button:disabled[aria-pressed=true] { border-color: var(--rating-ink, #6d798c); box-shadow: 0 0 0 2px var(--rating-line, #d9e0e9); }
.assessment-button .rating-symbol { display: block; font-size: 28px; font-weight: 700; line-height: 1.1; }
.assessment-button.rating-hard .rating-symbol { font-size: 21px; letter-spacing: -3px; margin-right: 3px; }
.assessment-button .rating-label { font-size: 12px; line-height: 1.5; font-weight: 600; text-align: center; overflow-wrap: anywhere; }
.card-navigation { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; max-width: 740px; margin: 18px auto 0; }
.card-navigation .button { min-height: 48px; min-width: 112px; padding: 12px 22px; border-radius: 10px; font-size: 15px; }
.card-navigation .next-button { min-width: 160px; margin-left: auto; box-shadow: 0 3px 7px #2879ec24; }
.card-navigation .button:disabled { cursor: default; opacity: .4; box-shadow: none; }
.card-navigation .button svg { width: 18px; height: 18px; }
.previous-button svg { transform: rotate(180deg); }
.status-filters { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 20px; }
.status-filters button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; padding: 8px 13px; border: 1px solid #dfe5ed; border-radius: 9px; background: white; color: #526176; font-size: 13px; }
.status-filters button[aria-pressed=true] { background: #edf4ff; border-color: #96bdf4; color: #236ed8; }
.status-filters .rating-symbol { color: var(--rating-ink, inherit); font-size: 17px; font-weight: 700; }
.status-filters .rating-hard .rating-symbol { font-size: 13px; letter-spacing: -3px; }
.status-filters strong, .status-filters small { color: #6d798c; font-size: 12px; font-weight: 500; }
.settings-summary { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 6px; color: #667085; font-size: 12px; }
.writing-input-label { display: block; margin-bottom: 9px; color: #526075; font-family: 'Noto Sans JP', sans-serif; font-size: 13px; font-weight: 500; text-align: left; }
.write-form .writing-input-label + input { min-height: 65px; background: white; }
.writing-autograde { display: flex; align-items: center; justify-content: center; gap: 8px; color: #667085; font-size: 12px; }
.writing-autograde svg { width: 16px; height: 16px; }
.writing-autograde strong { color: #317a4b; font-weight: 600; }
.writing-autograde.wrong strong { color: #b2574d; }

/* A large, tactile selection sheet with a fixed action area. */
#practice-settings {
  width: calc(100% - 48px);
  max-width: 720px;
  max-height: min(90dvh, 860px);
  padding: 0;
  border: 1px solid #dce4ef;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 24px 90px #172a4540;
}
#practice-settings[open] { display: flex; flex-direction: column; }
#practice-settings::backdrop { background: #1c2b415c; backdrop-filter: blur(4px); }
#practice-settings .dialog-heading { flex-shrink: 0; margin: 0; padding: 22px 28px; border-bottom: 1px solid #e7ecf3; }
#practice-settings .dialog-heading h2 { font-size: 23px; line-height: 1.5; }
#practice-settings .dialog-heading .icon-button { width: 40px; height: 40px; background: #f1f4f8; border: 1px solid #e7ebf1; }
#practice-settings .dialog-heading .icon-button:hover { background: #e8eef7; color: #263348; }
#practice-settings #settings-form { display: flex; flex: 1; min-height: 0; flex-direction: column; overflow: hidden; }
.settings-content { flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding: 24px 28px 28px; scrollbar-width: thin; scrollbar-color: #cdd7e5 transparent; }
.settings-section + .settings-section { margin-top: 26px; }
.settings-section h3, .settings-advanced h3 { margin: 0 0 13px; color: #344054; font-size: 14px; line-height: 1.6; font-weight: 700; }
.settings-presets { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; }
.preset-button { display: flex; align-items: center; justify-content: center; gap: 7px; min-height: 45px; padding: 10px 12px; border: 1px solid #dce4ef; border-radius: 9px; background: #f9fbfe; color: #526075; font-size: 14px; line-height: 1.5; font-weight: 600; }
.preset-button svg { width: 18px; height: 18px; }
.preset-button:hover { border-color: #a9c7f0; background: #f1f7ff; }
.preset-button[aria-pressed=true] { background: #edf4ff; border-color: #80b0f4; color: #236ed8; box-shadow: 0 0 0 1px #2879ec12; }
.rating-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.rating-choice { display: flex; min-width: 0; min-height: 98px; flex-direction: column; align-items: center; justify-content: center; gap: 4px; padding: 11px 6px 9px; border: 1px solid #dfe5ed; border-radius: 11px; background: white; color: #667085; }
.rating-choice .rating-symbol { color: var(--rating-ink, #667085); font-size: 28px; line-height: 1.2; font-weight: 700; }
.rating-choice.rating-hard .rating-symbol { font-size: 20px; letter-spacing: -4px; margin-right: 4px; }
.rating-choice.rating-unseen .rating-symbol { font-size: 18px; line-height: 1.85; }
.rating-choice .rating-label { font-size: 11px; line-height: 1.5; font-weight: 500; text-align: center; }
.rating-choice .rating-count { font-size: 12px; line-height: 1.5; font-weight: 600; font-variant-numeric: tabular-nums; color: #8792a2; }
.rating-choice:hover { border-color: var(--rating-line, #b9d2f6); background: #fafcff; }
.rating-choice[aria-pressed=true] { border-color: var(--rating-line, #b9d2f6); background: var(--rating-bg, #edf4ff); color: var(--rating-ink, #2867ba); box-shadow: inset 0 0 0 1px var(--rating-line, #b9d2f6); }
.rating-choice[aria-pressed=true] .rating-count { color: var(--rating-ink, #2867ba); opacity: .8; }
.choice-row { display: flex; flex-wrap: wrap; gap: 8px; }
.choice-chip { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 42px; padding: 9px 17px; border: 1px solid #d8e1ee; border-radius: 9px; background: white; color: #637086; font-size: 13px; line-height: 1.6; font-weight: 500; }
.choice-chip svg { width: 17px; height: 17px; }
.choice-chip:hover { border-color: #a9c7f0; background: #f7faff; }
.choice-chip[aria-pressed=true] { border-color: #2879ec; background: #2879ec; color: white; box-shadow: 0 2px 4px #2879ec1a; }
.settings-advanced { margin-top: 26px; padding-top: 20px; border-top: 1px solid #e5eaf2; }
.settings-advanced summary { display: flex; align-items: center; gap: 8px; cursor: pointer; color: #667085; font-size: 13px; font-weight: 500; list-style: none; }
.settings-advanced summary::-webkit-details-marker { display: none; }
.settings-advanced summary::before { content: '+'; display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; background: #edf1f7; color: #526075; border-radius: 5px; font-size: 16px; line-height: 1; }
.settings-advanced[open] summary::before { content: '−'; }
.settings-advanced[open] summary { margin-bottom: 20px; }
.settings-advanced .choice-row + h3 { margin-top: 22px; }
.settings-advanced .settings-section { margin-top: 20px; }
.settings-footer { display: flex; align-items: center; gap: 12px; flex-shrink: 0; padding: 18px 28px; border-top: 1px solid #e3e9f2; background: white; box-shadow: 0 -4px 14px #23354d04; }
.settings-match { margin-right: auto; color: #667085; font-size: 12px; white-space: nowrap; }
.settings-match strong { color: #2879ec; font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }
.settings-footer .button { min-height: 44px; padding: 11px 17px; font-size: 14px; }
.settings-footer .button.primary { min-width: 130px; box-shadow: 0 3px 6px #2879ec1f; }

@media (max-width: 720px) {
  .assessment-buttons { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .assessment-button { min-height: 76px; border-radius: 9px; padding: 9px 3px; gap: 6px; }
  .assessment-button .rating-symbol { font-size: 26px; }
  .assessment-button.rating-hard .rating-symbol { font-size: 16px; letter-spacing: -4px; margin-right: 4px; }
  .assessment-button .rating-label { font-size: 12px; line-height: 1.5; }
  .card-navigation { margin-top: 16px; }
  .card-navigation .button { min-height: 46px; min-width: 96px; padding: 11px 17px; font-size: 14px; }
  .card-navigation .next-button { min-width: 144px; }
  .assessment-badge { padding: 4px 7px; gap: 5px; font-size: 11px; }
  .assessment-badge .rating-symbol { font-size: 14px; }
  .assessment-badge.rating-hard .rating-symbol { font-size: 11px; }
  .status-filters { gap: 7px; margin-bottom: 18px; }
  .status-filters button { min-height: 40px; padding: 8px 10px; gap: 6px; font-size: 12px; }
  .writing-input-label { font-size: 12px; }
  .writing-autograde { font-size: 11px; }
  #practice-settings { width: calc(100% - 24px); max-height: calc(100dvh - 24px); border-radius: 17px; }
  #practice-settings .dialog-heading { padding: 17px 20px; }
  #practice-settings .dialog-heading h2 { font-size: 21px; }
  .settings-content { padding: 20px; }
  .settings-section + .settings-section { margin-top: 24px; }
  .settings-presets { gap: 7px; }
  .preset-button { min-height: 44px; padding: 9px 5px; gap: 5px; font-size: 12px; }
  .preset-button svg { width: 16px; height: 16px; }
  .rating-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .rating-choice { min-height: 84px; padding: 10px 5px 8px; }
  .rating-choice .rating-symbol { font-size: 27px; }
  .rating-choice.rating-hard .rating-symbol { font-size: 20px; }
  .rating-choice .rating-label { font-size: 11px; }
  .rating-choice .rating-count { font-size: 11px; }
  .choice-chip { min-height: 42px; padding: 9px 12px; font-size: 12px; }
  .settings-section h3, .settings-advanced h3 { font-size: 13px; }
  .settings-footer { gap: 8px; padding: 15px 20px; }
  .settings-match { font-size: 11px; }
  .settings-match strong { font-size: 18px; }
  .settings-footer .button { padding: 10px 12px; font-size: 12px; }
  .settings-footer .button.primary { min-width: 110px; }
}
@media (max-width: 374px) {
  .assessment-buttons { gap: 5px; }
  .card-navigation { gap: 10px; }
  .card-navigation .button { min-width: 88px; padding-left: 13px; padding-right: 13px; }
  .card-navigation .next-button { min-width: 132px; }
  .assessment-button .rating-symbol { font-size: 24px; }
  .assessment-button.rating-hard .rating-symbol { font-size: 14px; letter-spacing: -3px; margin-right: 3px; }
  .assessment-button .rating-label { font-size: 10px; }
  .settings-content { padding: 18px 16px; }
  #practice-settings .dialog-heading { padding: 16px; }
  .settings-footer { flex-wrap: wrap; padding: 14px 16px; }
  .settings-match { flex: 1; }
  .settings-footer .button.primary { min-width: 105px; }
  .preset-button { font-size: 11px; }
}

/* Keep the answer and its assessment together within a laptop viewport. */
.flashcard.revealed .question-area { min-height: 76px; padding: 8px 40px 14px; }
.flashcard.revealed .question-word { font-size: 48px; }
.flashcard.revealed .question-word.reverse { font-size: 24px; }
.flashcard.revealed .question-english { font-size: 15px; margin-top: 4px; }
.flashcard.revealed .answer-panel { padding: 16px 24px 2px; }
.flashcard.revealed .answer-row { margin-bottom: 10px; }
.flashcard.revealed .card-action-area { padding: 16px 28px 20px; }
.assessment-button { min-height: 70px; }
.assessment-history { margin: 12px 28px 0; padding: 0 0 10px; text-align: left; }
.assessment-history summary { display: flex; align-items: center; gap: 7px; width: max-content; max-width: 100%; color: #667085; font-size: 12px; cursor: pointer; }
.assessment-history summary span { color: #8b97a8; font-size: 11px; }
.assessment-history > div { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 10px; }
.history-entry { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 7px; padding: 6px 9px; border: 1px solid var(--rating-line, #d9e0e9); border-radius: 7px; background: var(--rating-bg, #f0f3f7); color: var(--rating-ink, #6d798c); font-size: 12px; line-height: 1.5; }
.history-entry strong { font-size: 15px; font-weight: 700; }
.history-entry.rating-hard strong { font-size: 11px; letter-spacing: -2px; margin-right: 2px; }
.history-entry time { color: #667085; font-size: 11px; }
.history-entry small { font-size: 12px; font-weight: 500; }
.assessment-board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.assessment-board .rank-tile::before { background: var(--rating-line, #dfe5ed); }
.result-banner { display: flex; align-items: center; gap: 8px; }
.result-banner svg { width: 18px; height: 18px; }
.result-banner > span { margin-left: auto; font-size: 12px; font-weight: 400; }
.result-banner.unanswered { background: #f0f3f7; color: #6d798c; }
.result-banner.unanswered > .rating-symbol { margin-left: 0; font-size: 19px; font-weight: 600; }
.assessment-next { justify-content: center; align-items: center; }
.settings-content { padding: 20px 28px; }
.settings-section + .settings-section { margin-top: 18px; }
.settings-section h3, .settings-advanced h3 { margin-bottom: 10px; }
.settings-advanced { margin-top: 18px; padding-top: 16px; }

@media (max-width: 720px) {
  .flashcard.revealed .question-area { min-height: 80px; padding: 8px 24px 14px; }
  .flashcard.revealed .question-word { font-size: 48px; }
  .flashcard.revealed .question-word.reverse { font-size: 22px; }
  .flashcard.revealed .answer-panel { padding: 14px 16px 2px; }
  .flashcard.revealed .card-action-area { padding: 14px 20px 20px; }
  .assessment-button { min-height: 72px; }
  .assessment-history { margin-left: 20px; margin-right: 20px; }
  .assessment-board { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .settings-content { padding: 20px; }
}
@media (max-width: 374px) {
  .settings-content { padding: 18px 16px; }
  .assessment-button { padding-left: 1px; padding-right: 1px; }
  .assessment-button .rating-label { white-space: nowrap; }
}