.er-page{max-width:1180px;margin:auto;padding:32px 24px 64px}
.er-progress-panel{padding:18px 0;border-bottom:1px solid var(--line)}.er-progress-title{display:flex;justify-content:space-between;gap:12px;font-size:.85rem}.er-progress-panel progress{width:100%;height:8px;accent-color:var(--accent);margin:10px 0 16px}.er-metrics{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}.er-metrics>div{display:grid;gap:5px}.er-metrics strong{font-size:1.35rem}.er-metrics span,.er-progress-panel details{font-size:.75rem;color:var(--muted)}.er-progress-panel details{margin-top:14px}.er-progress-panel summary{cursor:pointer}.er-session-size{display:grid;gap:4px;font-size:.75rem}.er-session-size select{padding:6px;min-height:36px}.er-collection-list .er-row{flex-wrap:wrap}.er-collection-list .er-open{min-width:240px}.er-collection-list .er-open small{line-height:1.5}.er-finish .secondary{margin-left:12px}@media(max-width:700px){.er-metrics{grid-template-columns:repeat(3,1fr)}}
.er-page [hidden]{display:none!important}
.er-heading,.er-toolbar,.er-row,.er-tools,.er-study-strip,.er-list-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}
.er-heading{margin-bottom:28px}.er-heading h1{font-size:2rem;margin:8px 0}.er-heading p,.er-toolbar p{margin:6px 0 0}
.er-summary{display:grid;text-align:right;white-space:nowrap}.er-summary strong{font-size:2rem;color:var(--accent)}.er-summary span{font-size:.85rem;color:var(--muted)}
.er-areas{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:24px}
.er-area{display:flex;align-items:center;gap:14px;text-align:left;background:var(--panel,var(--bg));color:var(--text);border:1px solid var(--line);border-radius:12px;padding:19px 16px;cursor:pointer;min-width:0}
.er-area.active{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--bg))}.er-area strong,.er-area small{display:block}.er-area strong{font-size:1rem}.er-area small{font-size:.8rem;color:var(--muted);margin-top:5px}.er-area-icon{font-size:1.6rem;color:var(--accent)}
.er-workspace{border:1px solid var(--line);border-radius:14px;padding:24px;background:var(--panel,var(--bg))}.er-breadcrumb{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:.8rem;color:var(--muted);margin-bottom:20px}.er-toolbar{align-items:flex-start}.er-toolbar h2{font-size:1.5rem;margin:0;overflow-wrap:anywhere}.er-toolbar p{font-size:.9rem}.er-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.er-actions button{white-space:nowrap}
.er-study-strip{margin-top:24px;padding:20px;background:color-mix(in srgb,var(--accent) 5%,var(--bg));border:1px solid var(--line);border-radius:10px}.er-study-strip>div:first-child{display:grid;gap:5px}.er-study-strip .muted{font-size:.83rem}
.er-tools{align-items:flex-end;margin:24px 0;gap:16px;flex-wrap:wrap}.er-tools label{font-size:.8rem;display:grid;gap:6px;color:var(--muted)}.er-tools input,.er-tools select{margin:0;min-height:42px}.er-search{flex:1;min-width:220px}.er-tools .er-text{min-height:42px}
.er-text{border:0;background:transparent;color:var(--accent);padding:4px 0;cursor:pointer;font:inherit;font-size:.85rem;text-align:left}.er-text:hover{text-decoration:underline}.er-list-heading{margin:22px 0 10px}.er-list-heading h3{font-size:.9rem;margin:0}.er-list-heading span{font-size:.8rem}
.er-collection-list{border-top:1px solid var(--line)}.er-row{padding:12px 0;border-bottom:1px solid var(--line);gap:14px}.er-row small{display:block;color:var(--muted);font-size:.8rem;margin-top:5px}.er-open{display:flex;align-items:center;gap:14px;flex:1;text-align:left;border:0;background:transparent;color:var(--text);padding:6px 0;cursor:pointer;min-width:0;font:inherit}.er-open strong{font-size:.95rem;overflow-wrap:anywhere}.er-open:hover strong{color:var(--accent)}.er-folder-icon{width:36px;height:36px;display:grid;place-items:center;flex-shrink:0;background:color-mix(in srgb,var(--accent) 8%,var(--bg));border-radius:8px;color:var(--accent);font-size:1.15rem}.er-pill{padding:4px 9px;font-size:.75rem;border:1px solid var(--line);border-radius:20px;white-space:nowrap;color:var(--muted)}.er-pill.due{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 35%,var(--line))}
.er-card-row{display:flex;justify-content:space-between;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}.er-card-row>div:first-child{min-width:0}.er-card-row strong{font-size:.95rem;white-space:pre-wrap;overflow-wrap:anywhere}.er-card-row details{margin:10px 0}.er-card-row summary{font-size:.8rem;color:var(--accent);cursor:pointer}.er-card-tools{display:flex;flex-direction:column;align-items:flex-end;gap:8px}.er-pre{white-space:pre-wrap;overflow-wrap:anywhere}.er-empty{text-align:center;padding:46px 20px}.er-empty>span{color:var(--accent);font-size:2rem}.er-empty h3{font-size:1.1rem}.er-empty p{max-width:510px;margin:auto;font-size:.9rem}.er-suggestions{margin-top:24px;border:1px solid var(--line);border-radius:12px;padding:18px}.er-suggestions summary{cursor:pointer}.er-suggestions .er-row>div{min-width:0;overflow-wrap:anywhere}
.er-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.er-form-actions{margin-top:20px}.er-preview-item{display:flex;align-items:flex-start;gap:12px;border-bottom:1px solid var(--line);padding:15px 0}.er-preview-item input{width:auto;margin-top:5px}.er-preview-item span span,.er-preview-item small{display:block;margin-top:8px}.er-preview-item small{color:var(--muted)}
.er-study{max-width:880px}.er-study progress{width:100%;height:5px;margin:20px 0;accent-color:var(--accent)}.er-study-card{border:1px solid var(--line);border-radius:16px;padding:40px;background:var(--panel,var(--bg));margin-bottom:22px}.er-study-card h1{font-size:1.5rem;line-height:1.5;margin:26px 0}.er-study-card h2{font-size:.85rem;color:var(--muted);text-transform:uppercase;letter-spacing:.1em}.er-study-card #er-answer-area{border-top:1px solid var(--line);margin-top:24px;padding-top:20px;line-height:1.7}.er-grades{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.er-grades button{display:grid;gap:6px;padding:15px}.er-grades small{color:var(--muted)}.er-shortcuts{font-size:.8rem;text-align:center;margin-top:24px}.er-finish{text-align:center;padding-top:80px}.er-page button:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.er-page button:disabled{opacity:.45;cursor:not-allowed}
@media(max-width:850px){.er-toolbar,.er-study-strip{align-items:flex-start;flex-direction:column}.er-areas{grid-template-columns:repeat(2,minmax(0,1fr))}.er-page{padding:24px 16px}.er-workspace{padding:18px}.er-heading h1{font-size:1.6rem}}
@media(max-width:480px){.er-heading{align-items:flex-start}.er-summary{display:none}.er-area{padding:14px 10px;gap:9px}.er-area strong{font-size:.88rem}.er-area-icon{font-size:1.25rem}.er-row{flex-wrap:wrap}.er-open{flex-basis:65%}.er-row>.small{display:none}.er-study-card{padding:22px}.er-grades{grid-template-columns:repeat(2,1fr)}.er-actions{width:100%}.er-actions button{flex:1}.er-card-row{gap:12px}}

/* ===== Player de estudo: um cartão por vez ===== */
.er-player{max-width:920px}
.er-player-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}
.er-player-scope{font-size:.8rem;color:var(--muted);text-align:center;flex:1;overflow-wrap:anywhere}
.er-player-stage{display:flex;align-items:center;gap:14px}
.er-nav{flex:0 0 auto;width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:var(--panel,var(--bg));color:var(--text);font-size:1.7rem;line-height:1;cursor:pointer;display:grid;place-items:center;transition:border-color .15s,color .15s}
.er-nav:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}
.er-flip{flex:1;min-width:0;min-height:330px;display:flex;flex-direction:column;gap:16px;border:1px solid var(--line);border-radius:18px;padding:40px 44px;background:var(--panel,var(--bg));cursor:pointer;text-align:left;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.er-flip.is-revealed{cursor:default;border-color:color-mix(in srgb,var(--accent) 30%,var(--line))}
.er-flip:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.er-flip-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.er-flip-head small{color:var(--muted);font-size:.75rem;letter-spacing:.04em;text-transform:uppercase;overflow-wrap:anywhere}
.er-pill.marked{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 35%,var(--line))}
.er-flip-front{font-size:1.45rem;line-height:1.55;font-weight:500;flex:1;display:flex;align-items:center}
.er-flip.is-revealed .er-flip-front{font-size:1.15rem;flex:0 0 auto;align-items:flex-start;color:var(--muted);font-weight:400}
.er-flip-hint{font-size:.9rem;color:var(--accent);margin:0;padding:10px 14px;border-left:2px solid var(--accent);background:color-mix(in srgb,var(--accent) 6%,transparent)}
.er-flip-back{border-top:1px solid var(--line);padding-top:20px;line-height:1.75;font-size:1.05rem;flex:1}
.er-flip-back h2{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.12em;margin:0 0 12px}
.er-flip-cue{margin:0;font-size:.78rem;color:var(--muted);text-align:center}
.er-player-meter{display:flex;align-items:center;gap:16px;margin:20px 0 22px;padding:0 62px}
.er-player-meter progress{flex:1;height:4px;accent-color:var(--accent)}
.er-counter{font-variant-numeric:tabular-nums;font-size:.9rem;font-weight:600;white-space:nowrap}
.er-player-meter .muted{font-size:.78rem;white-space:nowrap}
.er-player-controls{padding:0 62px}
.er-player-controls .er-wide{width:100%;min-height:52px;font-size:1rem}
.er-graded{text-align:center;font-size:.85rem;color:var(--muted);margin:0 0 12px}
.er-player-aux{display:flex;justify-content:center;gap:24px;margin-top:16px}
.er-progress-collapsed{margin-top:30px;border-top:1px solid var(--line);padding-top:8px}
.er-progress-collapsed>summary{cursor:pointer;font-size:.82rem;color:var(--muted);padding:8px 0}
.er-progress-collapsed .er-progress-panel{border-bottom:0}
.er-manage{margin-top:26px;border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.er-manage>summary{cursor:pointer;font-size:.9rem;font-weight:600}
.er-manage>p{font-size:.8rem;margin:10px 0 0}
.er-finish-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:26px}
.er-finish .secondary{margin-left:0}
@media(max-width:700px){
  .er-flip{padding:26px 22px;min-height:260px}
  .er-flip-front{font-size:1.2rem}
  .er-nav{width:38px;height:38px;font-size:1.3rem}
  .er-player-meter,.er-player-controls{padding:0}
  .er-player-stage{gap:8px}
}

/* ===== Mecânicas de aprendizagem no player ===== */
.er-flip-tags{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.er-pill.er-variant{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 35%,var(--line))}
.er-reveal-row{display:grid;gap:12px}
.er-confidence{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px}
.er-confidence>span{font-size:.78rem;width:100%;text-align:center}
.er-confidence button{min-height:36px;padding:6px 14px}
.er-grades.er-grades-two{grid-template-columns:repeat(2,1fr)}
.er-after{padding:0 62px;margin-top:18px;display:grid;gap:10px}
.er-note{border:1px solid var(--line);border-radius:10px;padding:10px 14px}
.er-note>summary{cursor:pointer;font-size:.85rem;color:var(--accent)}
.er-note textarea{width:100%;margin:10px 0 8px;font:inherit;font-size:.9rem}
.er-leech{margin:0 62px 16px;padding:12px 16px;border-left:3px solid #d97706;background:color-mix(in srgb,#d97706 10%,transparent);border-radius:6px;font-size:.88rem;line-height:1.5}
.er-hyper{margin:0;padding:10px 14px;border-left:3px solid #dc2626;background:color-mix(in srgb,#dc2626 9%,transparent);border-radius:6px;font-size:.88rem}
.er-finish .er-hyper{display:inline-block;margin-top:12px;text-align:left}
.er-calibration{font-size:.8rem;color:var(--muted);margin:12px 0 0}
#er-lenses:empty{display:none}
@media(max-width:700px){.er-after,.er-leech{padding-left:0;padding-right:0;margin-left:0;margin-right:0}.er-leech{padding:12px}}

/* ===== Metodologias ativas: pensar antes, pausa, recordação livre, painel da memória ===== */
.er-tip{margin:0;padding:10px 14px;border-left:3px solid var(--accent);background:color-mix(in srgb,var(--accent) 7%,transparent);border-radius:6px;font-size:.86rem;line-height:1.55}
.er-finish .er-tip{display:inline-block;margin-top:14px;text-align:left;max-width:640px}
.er-pause{margin:0 62px 16px;padding:12px 16px;border-left:3px solid #2563eb;background:color-mix(in srgb,#2563eb 10%,transparent);border-radius:6px;font-size:.88rem;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
#er-reveal:disabled{opacity:.55;cursor:wait}
.er-recall{max-width:680px;margin:28px auto 0;text-align:left;border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.er-recall h2{font-size:1rem;margin:0 0 6px}
.er-recall textarea{width:100%;font:inherit;margin:10px 0}
.er-recall-missed{font-size:.85rem;line-height:1.6;padding-left:18px}
.er-memory{margin-top:18px;border:1px solid var(--line);border-radius:12px;padding:12px 16px}
.er-memory>summary{cursor:pointer;font-weight:600;font-size:.9rem}
.er-memory-tiles{margin:14px 0}
.er-memory-tiles small{font-size:.7rem;color:var(--muted);line-height:1.35}
.er-memory-h{font-size:.8rem;margin:12px 0 8px;color:var(--muted);font-weight:600}
.er-forecast{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;height:110px;align-items:end}
.er-forecast>div{display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%;gap:3px}
.er-forecast span{display:block;width:70%;min-height:2px;background:var(--accent);border-radius:4px 4px 0 0}
.er-forecast b{font-size:.75rem}
.er-forecast small{font-size:.68rem;color:var(--muted)}
.er-memory-note{font-size:.75rem;margin:10px 0 0}
@media(max-width:700px){.er-pause{margin-left:0;margin-right:0}}

/* ===== Placar: sessão (ao lado do contador) e histórico de cada cartão ===== */
.er-score{font-size:.72rem;padding:4px 9px;border-radius:20px;border:1px solid var(--line);white-space:nowrap;font-variant-numeric:tabular-nums}
.er-score.good{color:#4ade80;border-color:color-mix(in srgb,#4ade80 40%,var(--line))}
.er-score.mid{color:#fbbf24;border-color:color-mix(in srgb,#fbbf24 40%,var(--line))}
.er-score.bad{color:#f87171;border-color:color-mix(in srgb,#f87171 40%,var(--line))}
.er-score-new{color:var(--muted)}
.er-session-score{display:flex;gap:10px;font-size:.82rem;font-variant-numeric:tabular-nums;white-space:nowrap}
.er-session-score .ok{color:#4ade80}.er-session-score .hard{color:#fbbf24}.er-session-score .bad{color:#f87171}
.er-session-score .pct{padding:1px 8px;border-radius:10px;border:1px solid var(--line)}
.er-session-score .pct.good{color:#4ade80}.er-session-score .pct.mid{color:#fbbf24}.er-session-score .pct.bad{color:#f87171}
@media(max-width:700px){.er-player-meter{flex-wrap:wrap}.er-session-score{order:3;width:100%;justify-content:center}}

/* ===== Mapa de calor dos estudos (estilo Review Heatmap do Anki) ===== */
.er-heat{border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:24px;background:var(--panel,var(--bg))}
.er-heat-today{text-align:center;margin:0 0 12px;font-size:.95rem}
.er-heat-nav{display:flex;justify-content:center;gap:8px;margin-bottom:12px}
.er-heat-nav button{min-width:40px}
.er-heat-scroll{overflow-x:auto;padding-bottom:4px}
.er-heat-months,.er-heat-grid{display:grid;grid-template-columns:repeat(54,14px);gap:3px;width:max-content;margin:0 auto}
.er-heat-months{font-size:.65rem;color:var(--muted);height:14px;margin-bottom:4px}
.er-heat-months span{white-space:nowrap}
.er-heat-grid{grid-template-rows:repeat(7,14px)}
.er-heat i{display:block;width:14px;height:14px;border-radius:3px}
.er-heat .l0{background:color-mix(in srgb,var(--text) 9%,transparent)}
.er-heat .l1{background:color-mix(in srgb,var(--accent) 30%,transparent)}
.er-heat .l2{background:color-mix(in srgb,var(--accent) 55%,transparent)}
.er-heat .l3{background:color-mix(in srgb,var(--accent) 78%,transparent)}
.er-heat .l4{background:var(--accent)}
.er-heat .out{background:transparent}
.er-heat .today{outline:2px solid var(--text);outline-offset:-1px}
.er-heat-legend{display:flex;justify-content:flex-end;align-items:center;gap:4px;font-size:.7rem;color:var(--muted);margin:8px auto 0;max-width:900px}
.er-heat-legend i{width:11px;height:11px}
.er-heat-stats{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 28px;margin-top:14px;font-size:.88rem}
.er-heat-stats b.s-good{color:var(--accent)}.er-heat-stats b.s-mid{color:color-mix(in srgb,var(--accent) 70%,var(--text))}.er-heat-stats b.s-low{color:var(--muted)}
.er-heat-stats b{background:none}
@media(max-width:700px){.er-heat{padding:14px 12px}.er-heat-months,.er-heat-grid{grid-template-columns:repeat(54,11px);gap:2px}.er-heat-grid{grid-template-rows:repeat(7,11px)}.er-heat i{width:11px;height:11px}.er-heat-stats{font-size:.8rem;gap:6px 16px}}

/* Clear hierarchy and readable controls, scoped to this workspace. */
.er-page{--muted:#b2beb6;--er-card:#202922;--er-soft:#26342b;--er-empty:#3b4840;color:var(--text,#dee3dc);max-width:1160px}
html[data-theme='light'] .er-page{--muted:#43584b;--er-card:#fff;--er-soft:#eef5f0;--er-empty:#d5e0d9}
html[data-theme='beige'] .er-page{--muted:#514e3d;--er-card:#faf7ed;--er-soft:#eeeadc;--er-empty:#d9d1bf}
.er-page button{min-height:44px;box-shadow:none}
.er-page :is(button,a,input,select,textarea,summary):focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.er-page summary{min-height:44px;align-content:center;cursor:pointer;line-height:1.6}
.er-page .muted{color:var(--muted)}
.er-heading{margin-bottom:22px}.er-heading h1{font-size:clamp(1.65rem,3vw,2.25rem)}
.er-areas{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.er-area{padding:16px 18px;background:var(--panel);min-height:92px}
.er-area small{font-size:.88rem}.er-area strong{font-size:1.06rem}
.er-workspace{padding:24px 28px}.er-breadcrumb{margin-bottom:12px}
.er-study-strip{background:var(--er-soft);padding:22px;gap:24px;margin-top:20px}
.er-study-strip strong{font-size:1.2rem}.er-study-strip .muted{font-size:.95rem;max-width:520px;line-height:1.6}
.er-study-strip .eyebrow{font-size:.7rem;letter-spacing:.09em;margin-bottom:4px}
.er-study-strip .er-actions{flex-wrap:nowrap;align-items:end}
.er-study-strip .primary{min-height:50px;padding:12px 20px}
.er-session-size{font-size:.85rem}.er-session-size select{min-height:44px;padding:8px 12px;max-width:230px}
.er-learning-route{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;list-style:none;margin:22px 0 10px;padding:0}
.er-learning-route li{display:flex;gap:10px;align-items:flex-start;min-width:0}
.er-learning-route li>span{display:grid;place-items:center;width:28px;height:28px;flex-shrink:0;border:1px solid var(--line);border-radius:50%;color:var(--accent);font-size:.85rem}
.er-learning-route strong{display:block;font-size:.94rem}.er-learning-route small{display:block;color:var(--muted);font-size:.85rem;line-height:1.5;margin-top:3px}
.er-training-options{border-bottom:1px solid var(--line);padding-bottom:10px}.er-training-options summary{font-size:.9rem;color:var(--muted)}
.er-training-options p{font-size:.9rem}.er-training-options .er-actions{margin-top:10px}
.er-tools{margin-top:20px;margin-bottom:14px}.er-tools label,.er-text{font-size:.9rem}.er-tools input,.er-tools select{min-height:44px}
.er-row{padding:16px 0}.er-row small{font-size:.88rem}.er-open strong{font-size:1.05rem}
.er-pill{font-size:.8rem}.er-dashboard-progress{margin-top:20px}.er-progress-collapsed>summary{font-size:.9rem;color:var(--muted)}
.er-metrics span,.er-progress-panel details{font-size:.88rem}.er-progress-title{font-size:.94rem}
.er-activity{margin-top:24px;padding:10px 18px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.er-activity>summary{font-weight:600;font-size:.95rem}.er-activity>summary span{font-weight:400;color:var(--muted);font-size:.85rem}
.er-activity .er-heat{border:0;padding:12px 0;margin:0}.er-heat-grid{gap:3px}
.er-heat .er-heat-grid i{display:block!important;width:14px;height:14px;background:var(--er-empty);border-radius:3px}
.er-heat .er-heat-grid .l1{background:color-mix(in srgb,var(--accent) 30%,var(--er-empty))}
.er-heat .er-heat-grid .l2{background:color-mix(in srgb,var(--accent) 55%,var(--er-empty))}
.er-heat .er-heat-grid .l3{background:color-mix(in srgb,var(--accent) 78%,var(--er-empty))}
.er-heat .er-heat-grid .l4{background:var(--accent)}.er-heat .er-heat-grid .out{background:transparent}
.er-heat-table table{width:100%;border-collapse:collapse;font-size:.9rem}.er-heat-table th,.er-heat-table td{padding:8px 12px;border-bottom:1px solid var(--line);text-align:left}
.er-heat-table caption{text-align:left;color:var(--muted);padding:12px}
.er-study-step{font-size:.94rem;color:var(--muted);margin:0 62px 16px}
.er-flip{background:var(--er-card);min-height:350px;padding:30px 34px;border-radius:20px;border-color:#5c7264}
.er-flip header{background:none;padding:0;border:0;gap:12px;flex-wrap:wrap}
.er-flip-front{font-size:clamp(1.35rem,2.2vw,1.8rem);line-height:1.65;font-weight:500}
.er-flip.is-revealed .er-flip-front{font-size:1.05rem;line-height:1.5}.er-flip-back{font-size:1.18rem;line-height:1.75}
.er-flip-cue{font-size:.9rem}.er-flip-head small{font-size:.85rem;letter-spacing:0;text-transform:none}
.er-player-top{gap:14px;flex-wrap:wrap}.er-player-scope{font-size:.9rem}
.er-player-meter{flex-wrap:wrap}.er-player-controls .primary{box-shadow:none}
.er-player-aux{flex-wrap:wrap;gap:8px 22px;align-items:center}.er-grades button{padding:14px 10px;align-content:start;min-height:104px}
.er-grades span,.er-grades small{font-size:.8rem;line-height:1.5}.er-grades small{color:var(--muted)}
.er-grade-guide{color:var(--muted);font-size:.9rem;margin:0 0 12px}
.er-attempt{margin:0 62px 18px;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.er-attempt label,.er-attempt h2{display:block;font-size:.94rem;font-weight:600;margin:0 0 8px}
.er-attempt textarea{width:100%;resize:vertical;min-height:90px;font:inherit;font-size:1rem;line-height:1.6;margin:0 0 8px}
.er-attempt small{font-size:.86rem;color:var(--muted)}.er-attempt p{margin:8px 0 12px;font-size:1.05rem;line-height:1.6}
.er-answer-context{margin-top:16px;border-top:1px solid var(--line);padding-top:8px;font-size:.94rem}
.er-answer-context summary{color:var(--muted)}.er-note label{display:block;margin-top:10px;font-size:.9rem}.er-note textarea{line-height:1.6}
html[data-theme='light'] .er-flip,html[data-theme='beige'] .er-flip{border-color:#8e9f93}
html[data-theme='light'] .er-score.good,html[data-theme='beige'] .er-score.good{color:#21623c}
html[data-theme='light'] .er-score.mid,html[data-theme='beige'] .er-score.mid{color:#75500c}
html[data-theme='light'] .er-score.bad,html[data-theme='beige'] .er-score.bad{color:#a22626}
@media(max-width:850px){.er-study-strip .er-actions{width:100%;flex-wrap:wrap}.er-workspace{padding:20px}.er-learning-route{gap:12px}}
@media(max-width:700px){.er-study-step,.er-attempt{margin-left:0;margin-right:0}.er-nav{width:44px;height:44px}.er-player-stage{gap:6px}.er-flip{padding:22px 18px;min-height:280px}.er-player-top .er-player-scope{order:3;flex-basis:100%;text-align:left}.er-player-meter .muted{white-space:normal}.er-activity>summary span{display:block}.er-learning-route{grid-template-columns:1fr;gap:12px}}
@media(max-width:480px){.er-areas{grid-template-columns:1fr}.er-area{min-height:70px}.er-study-strip{padding:16px}.er-study-strip .er-actions{display:grid;grid-template-columns:1fr}.er-session-size select{max-width:none;width:100%}.er-flip-tags{justify-content:flex-start}.er-workspace{padding:16px}.er-player-controls .er-wide{font-size:1rem}.er-grades{grid-template-columns:repeat(2,1fr)}}
@media(prefers-reduced-motion:reduce){.er-page *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(max-width:480px){.er-player-stage{display:grid;grid-template-columns:1fr 1fr;gap:12px}.er-player-stage .er-flip{grid-column:1/-1;grid-row:1;width:100%}.er-player-stage #er-prev{grid-column:1;grid-row:2}.er-player-stage #er-next-card{grid-column:2;grid-row:2;justify-self:end}.er-player{padding-bottom:110px}}