.passive-page{min-height:100vh;background:#eef3f6;--subject:#57a8ff;--verb:#62e6a7;--object:#ff7777}.passive-page *{box-sizing:border-box}.passive-page button,.passive-page select,.passive-page input,.passive-page textarea{font:inherit}.passive-page button{touch-action:manipulation}.passive-page .if-app-brand span{width:48px;font-size:.78rem}.passive-tabs{display:flex;align-self:stretch;margin-left:auto}.passive-tabs button{min-width:132px;padding:0 1rem;border:0;border-bottom:3px solid transparent;color:#b9c8dc;background:transparent;font-weight:850;cursor:pointer}.passive-tabs button:hover,.passive-tabs button[aria-selected=true]{color:#fff;border-color:var(--if-cyan);background:rgba(255,255,255,.05)}.passive-shell{width:min(1480px,calc(100% - 2rem));margin:0 auto;padding:1rem 0 2rem}.passive-toolbar{display:grid;grid-template-columns:minmax(430px,auto) auto minmax(240px,1fr);gap:1rem;align-items:end;margin-bottom:1rem;padding:.8rem 1rem;border:1px solid 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#40516e;border-radius:9px;color:#e8f1fb;background:#22314c;font-weight:750;letter-spacing:0}.sentence-stage{position:relative;z-index:2;display:grid;grid-template-rows:auto auto 48px auto auto;align-content:center;min-height:390px;padding:1rem 2rem}.sentence-label{margin-bottom:.45rem;color:#9db0c9;font-size:.72rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.passive-label,.passive-row{opacity:0;transform:translateY(18px);transition:.45s ease}.grammar-row{display:grid;grid-template-columns:1fr minmax(160px,.55fr) 1.4fr;gap:.7rem;align-items:stretch}.grammar-token{display:flex;align-items:center;justify-content:center;min-height:78px;padding:.8rem 1rem;border:2px solid currentColor;border-radius:14px;background:rgba(255,255,255,.06);font-size:clamp(1.05rem,2.5vw,2rem);font-weight:900;line-height:1.15;text-align:center}.subject-token{color:var(--subject);background:rgba(87,168,255,.1)}.verb-token{color:var(--verb);background:rgba(98,230,167,.09)}.object-token{color:var(--object);background:rgba(255,119,119,.09)}.swap-arrows{display:grid;grid-template-columns:1fr minmax(160px,.55fr) 1.4fr;gap:.7rem;align-items:center;color:#7f91aa;font-size:2rem;text-align:center;opacity:0;transition:.3s ease}.sentence-stage.is-transformed .passive-label,.sentence-stage.is-transformed .passive-row,.sentence-stage.is-transformed .swap-arrows{opacity:1;transform:none}.sentence-stage.is-transformed .active-row .subject-token{animation:subjectPulse .7s ease}.sentence-stage.is-transformed .active-row .object-token{animation:objectPulse .7s ease}.sentence-stage.is-transformed .passive-row .verb-token{animation:verbBuild .75s ease}.board-navigation{position:relative;z-index:2;display:flex;justify-content:center;gap:.65rem;margin:.4rem 0 1rem}.board-navigation button{min-width:52px;min-height:52px;padding:.7rem 1rem;border:1px solid #40516e;border-radius:11px;color:#dce8f6;background:#22314c;font-weight:900;cursor:pointer}.board-navigation .transform-button{min-width:250px;color:#092524;border-color:var(--if-cyan);background:var(--if-cyan)}.memory-cards{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:.7rem}.memory-cards article{padding:.85rem 1rem;border:1px solid rgba(255,255,255,.15);border-radius:12px;background:rgba(255,255,255,.07)}.memory-cards span{display:block;margin-bottom:.2rem;color:#91a5bf;font-size:.65rem;font-weight:900;letter-spacing:.1em}.memory-cards strong{color:#eef6ff;font-size:.92rem}.memory-cards .formula-card{border-color:rgba(80,223,207,.5);background:rgba(80,223,207,.12)}.pen-dock{display:flex;align-items:center;justify-content:center;gap:.65rem;margin:.75rem auto 0;padding:.6rem;border:1px solid #d7e1e7;border-radius:14px;background:#fff;box-shadow:0 10px 30px rgba(31,48,71,.06)}.pen-dock button{min-height:44px;padding:.5rem .75rem;border:1px solid #d8e1e7;border-radius:9px;color:#48576d;background:#f4f7f9;font-weight:850;cursor:pointer}.pen-dock button[aria-pressed=true]{color:#fff;border-color:var(--if-navy);background:var(--if-navy)}.pen-dock .pen-colors{display:flex;gap:.45rem}.pen-dock .pen-colors button{width:34px;min-height:34px;padding:0;background:var(--pen)}.pen-dock .pen-colors button:nth-child(1){--pen:#fff}.pen-dock .pen-colors button:nth-child(2){--pen:#ffe06a}.pen-dock .pen-colors button:nth-child(3){--pen:#ff6b6b}.pen-dock .pen-colors button:nth-child(4){--pen:#62e6a7}.pen-dock label{display:flex;align-items:center;gap:.45rem;color:#657489;font-size:.78rem;font-weight:850}.pen-dock input{width:100px}.passive-exercise-card{min-height:620px;display:grid;grid-template-rows:auto 1fr auto;overflow:hidden;border-radius:22px;background:#fff;box-shadow:0 18px 50px rgba(31,48,71,.1)}.exercise-kicker{display:flex;justify-content:space-between;padding:1rem 1.4rem;border-bottom:1px solid #e4e9ed;color:#6b778a;font-size:.75rem;font-weight:900;letter-spacing:.08em}.passive-exercise-content{display:grid;align-content:center;justify-items:start;width:min(1050px,100%);margin:auto;padding:clamp(2rem,6vw,4rem)}.task-label{margin:0 0 1rem;color:#68768a;font-weight:800}.task-sentence{color:var(--if-navy);font-size:clamp(1.55rem,4vw,3.1rem);font-weight:900;line-height:1.35}.source-sentence{padding-left:1rem;border-left:7px solid var(--if-orange)}.sentence-gap{display:inline-flex;align-items:baseline;gap:.4rem;padding:0 .15rem;color:#087d78;border-bottom:4px solid var(--if-cyan)}.sentence-gap small{color:#718095;font-size:.48em}.answer-label{display:grid;gap:.4rem;width:min(720px,100%);margin-top:2rem;color:#6a788c;font-size:.74rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.answer-label input,.answer-label textarea{width:100%;min-height:58px;padding:.75rem 1rem;border:2px solid #cbd7df;border-radius:12px;color:var(--if-navy);background:#f8fafb;font-size:1.2rem;font-weight:800;text-transform:none;resize:vertical}.answer-label input:focus,.answer-label textarea:focus{outline:4px solid rgba(80,223,207,.25);border-color:#087d78}.hint-box{margin-top:1rem;padding:.8rem 1rem;border-left:5px solid var(--if-orange);border-radius:8px;color:#5f4b34;background:#fff4e7;font-weight:750}.passive-actions{display:flex;align-items:center;gap:.7rem;padding:1rem 1.4rem;border-top:1px solid #e4e9ed;background:#f8fafb}.passive-actions p{flex:1;margin:0;color:#59677b}.passive-actions p.correct{color:#087b56;font-weight:850}.passive-actions p.incorrect{color:#a3402e;font-weight:850}.passive-actions button{min-height:48px;padding:.65rem 1rem;border:0;border-radius:10px;font-weight:850;cursor:pointer}.hint-button{color:#55456f;background:#eee9f8}.passive-actions .check-button{color:#092524;background:var(--if-cyan)}.passive-actions .next-button{color:#fff;background:var(--if-navy)}@keyframes subjectPulse{50%{transform:translate(18px,12px);opacity:.5}}@keyframes objectPulse{50%{transform:translate(-18px,12px);opacity:.5}}@keyframes verbBuild{0%{transform:scale(.7);filter:blur(5px)}100%{transform:none;filter:none}}@media (prefers-reduced-motion:reduce){.passive-page *{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}@media(max-width:980px){.passive-page{overflow:auto}.passive-tabs button{min-width:auto;padding:0 .7rem}.passive-toolbar{grid-template-columns:1fr auto}.progress-wrap{grid-column:1/-1}.passive-board{min-height:720px}.grammar-row,.swap-arrows{grid-template-columns:1fr}.swap-arrows{display:none}.sentence-stage{grid-template-rows:auto auto 20px auto auto;padding:1rem .25rem}.grammar-token{min-height:56px}.memory-cards{grid-template-columns:1fr}.pen-dock{justify-content:flex-start;overflow-x:auto}.passive-exercise-card{min-height:650px}}@media(max-width:680px){.if-appbar-inner{width:calc(100% - 1rem)}.passive-page .if-app-brand strong{display:none}.passive-tabs{flex:1;overflow-x:auto}.passive-tabs button{min-width:94px;font-size:.75rem;white-space:nowrap}.passive-page .if-home-button{display:none}.passive-shell{width:calc(100% - 1rem);padding:.55rem 0 1rem}.passive-toolbar{grid-template-columns:1fr;padding:.7rem}.passive-segmented{display:grid;grid-template-columns:repeat(3,1fr)}.passive-segmented button{padding:.45rem;font-size:.76rem}.passive-random{width:100%}.progress-wrap{grid-column:auto}.passive-board{min-height:760px;padding:1rem;border-radius:16px}.board-head{align-items:flex-start;flex-direction:column}.board-head label,.board-head select{width:100%;max-width:none}.sentence-stage{min-height:400px}.grammar-token{font-size:1rem}.board-navigation .transform-button{min-width:0;flex:1}.memory-cards strong{font-size:.8rem}.pen-dock{justify-content:flex-start}.pen-dock label{display:none}.passive-exercise-content{padding:1.5rem}.passive-exercise-card{min-height:620px}.passive-actions{align-items:stretch;flex-wrap:wrap}.passive-actions p{flex-basis:100%}.passive-actions button{flex:1}.task-sentence{font-size:1.45rem}}