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.study-primary:hover{background:var(--text-100);color:var(--surface-1);border-color:var(--text-100)}.study-primary>span{font-size:1.25rem;transition:translate .14s ease}.study-primary:hover>span{translate:3px 0}.study-back{min-height:44px;padding:8px 0;border:0;background:none;color:var(--text-100);font:500 .9375rem var(--font-body);cursor:pointer;text-decoration:underline;text-underline-offset:4px}.study-modes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}html body .study-mode{position:relative;display:flex;flex-direction:column;padding:24px;border:1px solid var(--db-rule-strong);border-radius:4px;cursor:pointer;transition:border-color .14s ease,background .14s ease}.study-mode-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:28px}.study-mode-kicker{font-size:.875rem;color:var(--db-optic)}.study-mode>strong{font-family:var(--editorial-face);font-weight:500;font-size:1.75rem;line-height:1.2;letter-spacing:-.025em}html body 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ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 30px;padding-left:20px;margin:18px 0 0;font-size:.875rem}html body .study-field{min-width:0;border:0;padding:0;margin:0}.study-field legend{float:none;padding:0;margin-bottom:14px;font-size:1rem;font-weight:600}.study-banks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}html body .study-bank{display:flex;align-items:center;justify-content:space-between;gap:16px;border:1px solid var(--db-rule-strong);border-radius:4px;padding:22px;background:var(--surface-1);color:var(--text-100);text-align:left;cursor:pointer}.study-bank strong{font-family:var(--editorial-face);font-size:1.5rem;font-weight:500}.study-bank>span:first-child>span{font-size:.875rem;color:var(--muted-fg);line-height:1.5}.study-preferences{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding-top:28px;margin-top:28px;border-top:1px solid var(--db-rule)}.study-segments{display:flex;flex-wrap:wrap;gap:6px}.study-segments button{min-width:44px;min-height:44px;border:1px solid var(--db-rule-strong);border-radius:4px;background:var(--surface-1);color:var(--text-100);font:600 1rem var(--font-body);cursor:pointer}.study-segments button[aria-pressed=true]{background:var(--db-optic);color:var(--db-optic-ink);border-color:var(--db-optic)}.study-segments button:disabled{opacity:.45;cursor:not-allowed}html body .study-help{margin:12px 0 0;font-size:.875rem;line-height:1.5;color:var(--muted-fg)}html body .study-adaptive .study-toggle-row{padding:0 0 16px}.study-adaptive .study-details{padding-top:8px}.study-adaptive .study-field{margin-top:16px}.study-adaptive .study-field legend{font-size:.875rem}@keyframes study-arrive{0%{opacity:.5;translate:0 4px}to{opacity:1;translate:0 0}}@media(max-width:1000px){html body .study-setup :is(#unit-list,#topics-list){grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:720px){html body .study-setup{margin-top:12px;margin-bottom:40px}.study-heading{padding:16px 20px 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var(--editorial-face);letter-spacing:-.015em;text-wrap:pretty;scroll-margin-top:90px}.session-answer-area{display:flex;flex-direction:column;justify-content:center;margin-top:0}.session-answer-heading{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:4px 16px;margin:0 0 8px;font-size:.875rem}.session-help{color:var(--muted-fg);font-size:.8125rem}html body .study-session .session-answers{display:grid;grid-template-columns:1fr;gap:clamp(8px,1.2svh,12px);margin:0;padding:0}html body .study-session .session-answer{display:grid;grid-template-columns:28px minmax(0,1fr) 20px;align-items:center;gap:10px;width:100%;min-width:0;min-height:clamp(48px,7.5svh,72px);padding:12px 16px;margin:0;background:var(--surface-1);border:1px solid var(--db-rule-strong);border-radius:5px;color:var(--text-100);font:400 clamp(1rem,1.2vw,1.125rem)/1.4 var(--font-body);text-align:left;box-shadow:none;transform:none;opacity:1;cursor:pointer;transition:background .14s ease,border-color 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.session-answer:disabled{cursor:default}html body .study-session .session-answer.is-eliminated{opacity:1;text-decoration:none}.session-answer.is-eliminated .session-answer-copy{text-decoration:line-through;opacity:.5}.session-choice-row{display:grid;grid-template-columns:minmax(0,1fr) 36px;align-items:center;gap:5px}.session-eliminate{display:grid;place-items:center;width:36px;height:44px;padding:0;border:0;border-radius:4px;background:none;color:var(--muted-fg);font:400 1.25rem var(--font-body);cursor:pointer}.session-eliminate:hover:not(:disabled),.session-eliminate[aria-pressed=true]{color:var(--db-optic);background:var(--session-tint)}.session-eliminate:disabled{opacity:.35;cursor:default}.session-feedback-slot{flex-shrink:0;min-height:0;padding-top:0}html body .study-session .session-feedback{margin:0;padding:10px 0 0;border:0;border-radius:0;background:none;font-size:.9375rem;line-height:1.5;color:var(--muted-fg)}html body .study-session .session-feedback[hidden]{display:none!important}html body .study-session .session-feedback.ok{color:var(--session-good)}html body .study-session .session-feedback.bad{color:var(--session-bad)}.session-feedback p{margin:8px 0 0;color:var(--text-100)}.session-navigation{flex-shrink:0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;padding-top:12px;border-top:1px solid var(--db-rule)}.session-forward-actions{display:flex;align-items:center;gap:12px;margin-left:auto}html body .study-session .session-forward-actions>button[hidden]{display:none!important}html body .study-session :is(.session-primary,.session-secondary,.session-text-button){display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:44px;padding:10px 18px;border:1px solid transparent;border-radius:5px;font:600 .9375rem/1.4 var(--font-body);cursor:pointer;box-shadow:none;transform:none}html body .study-session .session-primary{background:var(--db-optic);border-color:var(--db-optic);color:var(--db-optic-ink)}html body .study-session .session-primary:hover:not(:disabled){background:var(--text-100);border-color:var(--text-100);color:var(--surface-1)}html body .study-session .session-secondary{background:var(--surface-1);border-color:var(--db-rule-strong);color:var(--text-100)}html body .study-session .session-secondary:hover:not(:disabled){border-color:var(--db-optic);color:var(--db-optic)}html body .study-session .session-text-button{padding:6px 0;background:none;border:0;color:var(--muted-fg);font-size:.875rem;font-weight:500}html body .study-session .session-text-button:hover:not(:disabled){color:var(--db-optic);text-decoration:underline;text-underline-offset:4px}html body .study-session :is(.session-primary,.session-secondary,.session-text-button):disabled{opacity:.4;cursor:default}html body .study-session :is(button,input):focus-visible{outline:2px solid var(--db-optic);outline-offset:3px}.session-type-answer{display:flex;align-items:center;flex-wrap:wrap;gap:12px}html body .study-session .session-type-answer input{flex:1 1 240px;min-width:0;width:100%;padding:13px 16px;min-height:48px;border:1px solid var(--db-rule-strong);border-radius:5px;background:var(--surface-1);color:var(--text-100);font:400 1rem/1.4 var(--font-body)}.session-underbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:4px 20px;margin-top:4px}html body .study-session .session-metrics{display:flex;flex-wrap:wrap;gap:12px 24px;margin:10px 0;padding:0}.session-metrics>div{display:flex;align-items:baseline;gap:6px;font-size:.875rem}.session-metrics dt{color:var(--muted-fg)}.session-metrics dd{margin:0;font-weight:600;font-variant-numeric:tabular-nums}.session-secondary-actions{display:flex;flex-wrap:wrap;gap:8px 24px}.session-finish{padding:24px 8px}html body .study-session .session-finish h2{margin:14px 0;font:500 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