/* Practice screens share the same controls while keeping the question in focus. */
.training-page { max-width: 1160px; margin-inline: auto; color: var(--ink); }
.training-page .training-heading { margin-bottom: 28px; align-items: center; }
.training-heading > div { min-width: 0; }
.training-page .training-heading h1 { font-size: clamp(28px, 3.4vw, 42px); font-weight: 750; letter-spacing: -.045em; line-height: 1.15; }
.training-page .training-heading p { max-width: 68ch; margin-top: 12px; line-height: 1.65; }
.training-title-detail { color: var(--muted); font-size: .62em; font-weight: 500; letter-spacing: -.02em; }
.training-symbol { display: inline-grid; place-items: center; width: 64px; height: 64px; border-radius: 20px; flex: none; color: var(--blue); background: var(--blue-soft); }
.training-page .panel { padding: 26px; border-radius: 22px; box-shadow: none; }
.training-page .panel-head { margin-bottom: 20px; }
.training-page .panel-head h2 { font-size: 18px; letter-spacing: -.025em; }
.training-page .panel-head p { margin: 5px 0 0; }
.training-page .btn { min-height: 44px; border-radius: 12px; padding: 11px 17px; font-weight: 650; line-height: 1.45; white-space: normal; text-align: center; }
.training-page .btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.training-page .btn.primary:hover:not(:disabled) { background: var(--primary-2); border-color: var(--primary-2); }
.training-page .btn.big { min-height: 52px; padding: 14px 20px; }
.training-page .btn:disabled { cursor: not-allowed; opacity: .52; }
.training-page .linklike { min-height: 36px; padding: 5px 3px; }
.training-page :is(button, a, input, select, summary, [tabindex]):focus-visible,
.training-practice-link a:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.training-page .hint { color: var(--muted); line-height: 1.65; }
.training-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; padding: 22px 8px; margin-bottom: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: 22px; }
.training-metrics-four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.training-metrics > div { display: flex; flex-direction: column; gap: 8px; padding: 0 24px; border-inline-end: 1px solid var(--line); }
.training-metrics > div:last-child { border: 0; }
.training-metrics span { color: var(--muted); font-size: 13px; line-height: 1.5; }
.training-metrics b { color: var(--ink); font-size: 32px; font-weight: 750; line-height: 1.15; font-variant-numeric: tabular-nums; letter-spacing: -.04em; }
.training-metrics b small { color: var(--muted); font-size: 16px; font-weight: 500; letter-spacing: 0; }
.training-metrics .hot b { color: var(--blue); }
.training-setup { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(300px, .95fr); align-items: start; gap: 22px; margin-bottom: 22px; }
.training-setup > .panel { min-width: 0; margin-bottom: 0; }
.training-page .deck-chips { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.training-page .deck-chip { flex-direction: row; align-items: center; gap: 11px; min-height: 76px; padding: 14px; border-radius: 13px; min-width: 0; }
.training-page .deck-chip b { display: block; font-size: 13px; font-weight: 650; line-height: 1.5; }
.training-page .deck-chip.on { background: var(--blue-soft); border-color: var(--blue); }
.training-page .deck-chip.locked { opacity: 1; border-style: dashed; }
.training-choice-copy { display: flex; flex-direction: column; gap: 4px; min-width: 0; overflow-wrap: anywhere; }
.training-page .training-choice-copy > span { color: var(--muted); line-height: 1.4; }
.training-page .training-choice-mark { width: 23px; height: 23px; display: grid; place-items: center; flex: none; border: 1px solid var(--line-2); border-radius: 7px; background: var(--surface); color: var(--muted); }
.training-page .on .training-choice-mark { background: var(--primary); border-color: var(--primary); color: #fff; }
.training-page .flash-lock-note { padding: 12px 14px; background: var(--surface-2); border-radius: 12px; line-height: 1.6; }
.training-page .modes { gap: 9px; margin-bottom: 18px; }
.training-page .mode { position: relative; min-height: 78px; padding: 15px 17px 15px 42px; border-radius: 13px; }
.training-page .mode::before { content: ''; position: absolute; left: 16px; top: 19px; width: 14px; height: 14px; border: 1px solid var(--line-2); border-radius: 50%; background: var(--surface); }
.training-page .mode.on::before { border: 4px solid var(--primary); }
.training-page .mode b { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.training-page .mode span { line-height: 1.55; }
.training-page .inline-setting { flex-wrap: wrap; gap: 12px; padding: 14px 0; border-top: 1px solid var(--line); color: var(--ink-2); font-size: 13px; }
.training-page .inline-setting :is(input, select) { min-height: 44px; border-radius: 10px; max-width: 100%; color: var(--ink); }
.training-start { margin-top: 8px; }
.training-start .btn { width: 100%; }
.training-start .hint { margin: 12px 0 0; text-align: center; font-size: 11px; }
.training-distribution { margin-top: 20px; padding-top: 17px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.training-distribution summary { cursor: pointer; line-height: 1.6; }
.training-distribution .boxes { margin-top: 24px; }
.training-page .box-col span { color: var(--muted); }
.training-exam-summary { display: grid; gap: 14px; margin: 18px 0; padding: 18px; color: var(--ink); background: var(--surface-2); border-radius: 14px; font-size: 14px; }
.training-exam-summary > span { display: flex; align-items: center; gap: 10px; }
.training-exam-summary .ic { color: var(--blue); }
.training-quiz-intro { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); align-items: stretch; gap: 22px; }
.training-brief { padding: 32px; border-radius: 24px; color: #fff; background: #152B42; display: flex; flex-direction: column; align-items: start; }
.training-brief .training-symbol { width: 54px; height: 54px; background: #294158; color: #B8E6D8; border-radius: 16px; margin-bottom: 26px; }
.training-brief h2 { color: #fff; font-size: clamp(24px, 2.5vw, 32px); font-weight: 700; line-height: 1.25; letter-spacing: -.03em; max-width: 20ch; }
.training-brief p { color: #D8E3ED; font-size: 14px; line-height: 1.8; margin: 18px 0 26px; }
.training-brief-facts { display: flex; gap: 16px 24px; flex-wrap: wrap; font-size: 12px; color: #E9EFF7; margin-top: auto; }
.training-brief-facts > span { display: flex; align-items: center; gap: 7px; }
.training-page .quiz-intro { max-width: none; margin: 0; display: flex; flex-direction: column; justify-content: center; }
.training-page .quiz-intro > h2 { font-size: 18px; line-height: 1.45; margin-bottom: 22px; }
.training-page .deck-summary { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-bottom: 26px; }
.training-page .ds-item { padding: 12px 8px; background: transparent; border-radius: 0; border-inline-end: 1px solid var(--line); }
.training-page .ds-item:last-child { border: 0; }
.training-page .ds-item b { font-size: 28px; letter-spacing: -.04em; }
.training-page .ds-item span { display: block; margin-top: 5px; line-height: 1.5; font-size: 12px; }
.training-page .session { max-width: 860px; }
.training-page .session-head { gap: 14px; margin-bottom: 18px; min-width: 0; }
.training-page .session-head .btn { font-size: 12px; padding-inline: 0; }
.training-page .session-count { text-align: center; font-size: 12px; line-height: 1.5; }
.training-page .session-score { min-height: 36px; padding: 6px 11px; border-radius: 10px; background: var(--green-soft); font-size: 13px; }
.training-page .session-bar { height: 4px; margin-bottom: 24px; background: var(--line); }
.training-page .q-card { padding: 32px; margin-bottom: 0; border-radius: 24px; }
.training-page .q-meta { margin-bottom: 24px; flex-wrap: wrap; gap: 9px; font-size: 12px; }
.training-page .q-text { font-size: clamp(20px, 2.5vw, 26px); font-weight: 700; line-height: 1.5; letter-spacing: -.02em; margin-bottom: 26px; overflow-wrap: anywhere; }
.training-page .q-card pre { max-width: 100%; overflow-x: auto; margin: 0 0 24px; border-radius: 13px; padding: 20px; }
.training-page .q-card pre code { white-space: pre; }
.training-page .options { gap: 11px; margin-bottom: 24px; }
.training-page .option { min-height: 66px; gap: 14px; padding: 14px 17px; border-radius: 14px; border-color: var(--line); line-height: 1.65; font-size: 14px; align-items: flex-start; }
.training-page .option .opt-letter { width: 30px; height: 30px; border-radius: 9px; font-size: 12px; }
.training-page .option .opt-text { flex: 1; min-width: 0; padding-top: 3px; overflow-wrap: anywhere; }
.training-page .option code { white-space: normal; overflow-wrap: anywhere; }
.training-page .option.correct { border-color: var(--green); }
.training-page .option.wrong { border-color: var(--red); }
.training-page .option.picked { border-color: var(--blue); }
.training-page .option.dim { opacity: 1; color: var(--muted); background: var(--surface-2); }
.training-answer-mark { flex: none; display: grid; place-items: center; min-height: 30px; color: inherit; }
.training-page .option.correct .training-answer-mark { color: var(--green); }
.training-page .option.wrong .training-answer-mark { color: var(--red); }
.training-page .explain { margin: 8px 0 22px; padding: 20px; font: inherit; border-radius: 14px; }
.training-page .explain > b { display: flex; align-items: center; gap: 9px; font-size: 15px; margin-bottom: 8px; }
.training-page .explain p { font-size: 14px; line-height: 1.8; margin: 0; overflow-wrap: anywhere; }
.training-page .training-question-next { display: flex; justify-content: flex-end; }
.training-answer-hint { margin: 0; text-align: center; font-size: 12px; color: var(--muted); }
.training-page .fc { perspective: none; cursor: auto; margin-bottom: 20px; }
.training-page .fc-inner { height: auto; min-height: 0; transform: none; transition: none; }
.training-page .fc.flipped .fc-inner { transform: none; }
.training-page .fc-face { position: relative; inset: auto; min-height: 360px; padding: 32px; overflow: visible; border-radius: 24px; transform: none; backface-visibility: visible; -webkit-backface-visibility: visible; box-shadow: none; }
.training-page .fc-face::before { display: none; }
.training-page .fc-face[aria-hidden="true"] { display: none; }
.training-page .fc-front { gap: 35px; cursor: pointer; }
.training-page .fc-front:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
.training-page .fc-q { font-size: clamp(26px, 3.3vw, 38px); font-weight: 700; line-height: 1.35; letter-spacing: -.035em; max-width: 30ch; overflow-wrap: anywhere; }
.training-page .fc-q code { white-space: normal; overflow-wrap: anywhere; }
.training-page .fc-box { color: var(--muted); }
.training-page .fc-flip-hint { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.training-page .fc-back { min-height: 0; }
.training-page .fc-back-head { margin-bottom: 24px; padding-bottom: 20px; align-items: flex-start; }
.training-page .fc-back-head b { flex: 1; min-width: 0; font-size: 17px; line-height: 1.5; }
.training-page .fc-back-head .btn { margin-left: auto; flex: none; min-width: 44px; padding: 10px; }
.training-page .fc-back .md { font-family: var(--sans); font-size: 15px; line-height: 1.85; overflow-wrap: anywhere; }
.training-page .fc-back .md pre { max-width: 100%; overflow-x: auto; }
.training-grade-prompt { font-size: 13px; color: var(--muted); margin: 0 0 12px; text-align: center; }
.training-page .grades { gap: 12px; }
.training-page .btn.grade { min-height: 76px; padding: 14px 20px; gap: 5px; background: var(--surface); }
.training-page .btn.grade kbd { position: static; padding: 1px 5px; margin-bottom: 2px; font-size: 10px; }
.training-page .btn.grade span { color: var(--muted); font-size: 12px; }
.training-page .btn.grade.ok { background: var(--green-soft); border-color: var(--green); color: var(--green); }
.training-page .btn.grade.bad { color: var(--red); }
.training-page .btn.grade.great { color: var(--blue); }
.training-page .flip-btn { min-height: 54px; }
.training-page .clock { font-size: 14px; padding: 9px 12px; background: var(--surface); border-radius: 11px; color: var(--ink); white-space: nowrap; }
.training-exam-map { padding: 18px 20px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); margin-bottom: 20px; }
.training-exam-map-label { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; min-height: 28px; font-size: 12px; color: var(--muted); cursor: pointer; list-style: none; }
.training-exam-map-label::-webkit-details-marker { display: none; }
.training-exam-map-label > span:nth-child(2) { margin-left: auto; }
.training-exam-map[open] .training-exam-map-label { margin-bottom: 16px; }
.training-exam-map[open] .training-exam-map-label > .ic { transform: rotate(90deg); }
.training-page .palette { gap: 8px; margin: 0; }
.training-page .pal { min-width: 44px; height: 44px; border-radius: 11px; font-size: 13px; }
.training-page .pal.ans { border: 1px solid var(--green); }
.training-page .pal.cur { border: 2px solid var(--primary); box-shadow: 0 0 0 2px var(--surface), 0 0 0 3px var(--blue); color: #fff; background: var(--primary); }
.training-page .exam-nav { margin-top: 10px; padding-top: 20px; border-top: 1px solid var(--line); gap: 12px; }
.training-page .exam-nav .btn.primary { margin-left: auto; }
.training-page .exam-nav [data-action="exam-submit"].ghost { flex-basis: 100%; min-height: 40px; font-size: 12px; color: var(--muted); }
.training-page .finish { padding: 12px 0 24px; }
.training-page .finish-card { width: 100%; max-width: 720px; padding: 36px; margin: 0; border: 1px solid var(--line); border-radius: 26px; background: var(--surface); }
.training-result-score { display: flex; flex-direction: column; align-items: center; gap: 12px; margin-bottom: 25px; }
.training-result-score .ring { width: 120px; height: 120px; margin: 0; }
.training-result-score .ring span { width: 100px; height: 100px; font-size: 28px; font-weight: 700; }
.training-result-score > span { font-size: 12px; color: var(--muted); }
.training-page .finish-card h1 { font-size: clamp(25px, 3vw, 34px); font-weight: 750; letter-spacing: -.035em; line-height: 1.25; margin-bottom: 14px; }
.training-page .finish-line { font-size: 14px; line-height: 1.75; }
.training-page .finish-card > .muted { font-size: 14px; line-height: 1.75; }
.training-page .finish-actions { gap: 12px; margin-top: 24px; }
.training-result-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 20px 0 0; margin-top: 20px; border-top: 1px solid var(--line); }
.training-result-stats > div { display: flex; flex-direction: column; gap: 4px; }
.training-result-stats b { font-size: 26px; }
.training-result-stats span { font-size: 12px; color: var(--muted); }
.training-page .training-review { max-width: 860px; margin: 0 auto 24px; }
.training-page .miss { padding: 24px 0; }
.training-page .miss p { margin: 9px 0; line-height: 1.8; overflow-wrap: anywhere; }
.training-page .miss .q-text { display: block; font-size: 16px; line-height: 1.65; letter-spacing: -.01em; margin-bottom: 14px; }
.training-page .miss.was-right { opacity: 1; }
.training-page .miss code { white-space: normal; overflow-wrap: anywhere; }
.training-page .training-breakdown { max-width: 860px; margin: 0 auto 24px; }
.training-page .training-breakdown .track-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; padding: 16px 0; }
.training-page .training-breakdown .track-row > span:first-child { display: flex; align-items: center; gap: 10px; min-width: 0; line-height: 1.5; }
.training-page .training-breakdown .track-row .bar { grid-column: 1 / -1; width: 100%; }
.training-table-scroll { max-width: 100%; overflow-x: auto; }
.training-page .training-history .table { min-width: 470px; }
.training-page .training-history th { padding-block: 14px; font-size: 12px; font-weight: 600; }
.training-page .training-history td { padding-block: 16px; }
.training-page .training-tally { font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
.training-tally > span { font-size: 13px; font-weight: 500; color: var(--muted); }
.training-guide { margin: 0 0 24px; padding: 0 2px; }
.training-guide summary { display: flex; align-items: center; gap: 10px; cursor: pointer; list-style: none; min-height: 44px; color: var(--blue); font-size: 13px; font-weight: 600; }
.training-guide summary::-webkit-details-marker { display: none; }
.training-guide summary > .ic:last-child { margin-left: auto; }
.training-guide[open] summary > .ic:last-child { transform: rotate(90deg); }
.training-guide .md { padding: 12px 0 0; max-width: 80ch; font: inherit; font-size: 13px; color: var(--muted); line-height: 1.85; }
.training-page .lvl-tabs { gap: 10px; margin-bottom: 22px; }
.training-page .lvl-tab { min-width: 0; min-height: 132px; gap: 7px; padding: 16px; border-radius: 16px; }
.training-page .lvl-tab b { font-size: 13px; font-weight: 700; line-height: 1.5; }
.training-page .lvl-tab > span { font-size: 11px; line-height: 1.5; }
.training-page .lvl-tab i { position: static; margin-top: auto; padding-top: 7px; font-size: 11px; color: var(--muted); }
.training-page .lvl-tab.on { border-color: var(--blue); }
.training-page .toolbar { gap: 12px; align-items: center; margin-bottom: 20px; }
.training-page .filters { flex-wrap: wrap; gap: 7px; }
.training-page .toolbar .filter { min-height: 44px; padding: 9px 14px; font-size: 12px; border-radius: 12px; }
.training-page .prob-list { margin-top: 14px; }
.training-page .prob-row { min-height: 75px; gap: 14px; padding: 12px 0; flex-wrap: wrap; }
.training-page .prob-st { width: 44px; height: 44px; border-radius: 12px; color: var(--muted); border-width: 1px; }
.training-page .prob-st.solved { color: var(--surface); }
.training-page .prob-st.review { color: var(--surface); }
.training-page .prob-name { display: inline-flex; gap: 8px; align-items: baseline; white-space: normal; overflow: visible; font-size: 14px; font-weight: 600; line-height: 1.65; overflow-wrap: anywhere; }
.training-page .prob-name .ic { color: var(--muted); }
.training-page .prob-row.solved .prob-name { color: var(--muted); text-decoration: none; }
.training-page .prob-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 5px; }
.training-page .prob-tags .chip { font-size: 10px; padding: 4px 7px; border-radius: 6px; }
.training-page .prob-date { width: 78px; font-size: 11px; color: var(--muted); }
.training-empty { display: flex; flex-direction: column; align-items: center; gap: 18px; padding: 60px 24px; text-align: center; color: var(--muted); background: var(--surface); border: 1px solid var(--line); border-radius: 22px; }
.training-empty h1, .training-empty h2 { font-size: 20px; line-height: 1.5; }
.training-empty-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.training-practice-link { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; padding: 26px; border-radius: 22px; }
.training-practice-link > div { flex: 1; min-width: 220px; }
.training-practice-link p { color: var(--muted); font-size: 14px; line-height: 1.7; margin: 8px 0; }
.training-practice-link .btn { margin: 0; }
:root[data-theme="dark"] .training-brief { background: #1D3650; border: 1px solid var(--line-2); }
:root[data-theme="dark"] .training-page .option.correct .opt-letter,
:root[data-theme="dark"] .training-page .option.wrong .opt-letter { color: var(--surface); }
@media (max-width: 1180px) {
  .training-setup { grid-template-columns: minmax(0, 1fr) minmax(270px, .85fr); gap: 18px; }
  .training-page .panel { padding: 22px; }
  .training-page .deck-chips { grid-template-columns: 1fr; }
  .training-page .lvl-tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .training-page .prob-date { display: none; }
}
@media (max-width: 900px) and (min-width: 741px) {
  .training-page .deck-chips { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 740px) {
  .training-page .training-heading { margin-bottom: 22px; }
  .training-heading > .training-symbol { display: none; }
  .training-setup, .training-quiz-intro { grid-template-columns: 1fr; }
  .training-page .deck-chips { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .training-brief { padding: 26px; }
  .training-metrics > div { padding-inline: 16px; }
  .training-metrics b { font-size: 27px; }
  .training-page .q-card, .training-page .fc-face { padding: 24px; }
  .training-page .lvl-tab { min-height: 124px; }
  .training-page .prob-tags { flex-basis: 100%; padding-left: 58px; }
  .training-page .prob-row { gap: 4px 14px; }
  .training-page .session-head { grid-template-columns: auto 1fr auto; gap: 10px; }
  .training-page .session-head .btn { max-width: 125px; }
  .training-page .finish-card { padding: 28px; }
}
@media (max-width: 480px) {
  .training-page .panel { padding: 18px; border-radius: 18px; }
  .training-page .deck-chips { grid-template-columns: 1fr; }
  .training-metrics { padding-block: 18px; }
  .training-metrics > div { padding-inline: 10px; }
  .training-metrics b { font-size: 24px; }
  .training-metrics span { font-size: 11px; }
  .training-metrics b small { font-size: 12px; }
  .training-metrics-four { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 0; }
  .training-metrics-four > div:nth-child(2) { border: 0; }
  .training-page .lvl-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .training-page .lvl-tab:last-child { grid-column: 1 / -1; min-height: 0; flex-direction: row; justify-content: space-between; align-items: center; }
  .training-page .lvl-tab:last-child > span { display: none; }
  .training-page .lvl-tab:last-child > i { padding-top: 0; margin-top: 0; }
  .training-page .session-head { grid-template-columns: 1fr auto; row-gap: 8px; }
  .training-page .session-count { grid-row: 2; grid-column: 1 / -1; text-align: left; }
  .training-page .session-head > :last-child { grid-column: 2; grid-row: 1; }
  .training-page .q-card { padding: 20px 16px; }
  .training-page .option { padding: 12px; gap: 10px; }
  .training-page .option .opt-letter { width: 27px; height: 27px; }
  .training-page .q-text { font-size: 20px; }
  .training-page .fc-face { padding: 22px; min-height: 350px; }
  .training-page .fc-back { min-height: 0; }
  .training-page .fc-tags { font-size: 12px; }
  .training-page .fc-box { width: 100%; margin-left: 0; }
  .training-page .grades { gap: 7px; }
  .training-page .btn.grade { padding: 12px 5px; font-size: 13px; }
  .training-page .btn.grade span { font-size: 10px; }
  .training-page .pal { min-width: 44px; }
  .training-exam-map { padding: 16px; }
  .training-page .finish-card { padding: 26px 20px; }
  .training-page .finish-actions { flex-direction: column; }
  .training-page .training-question-next .btn { width: 100%; }
  .training-page .training-breakdown .track-row > span:first-child { font-size: 13px; }
  .training-practice-link { padding: 22px; }
  .training-practice-link > div { min-width: 0; flex-basis: 100%; }
  .training-practice-link .btn { width: 100%; }
}