.study-home{padding:24px;border:1px solid #b7d4d1;border-radius:20px;background:#f4fbf9;color:#173d3b;margin-top:20px}.study-kicker{font-size:11px;letter-spacing:.16em;color:#416d69}.study-home h2{font-size:21px;margin:8px 0}.study-home p,.study-dialog p{font-size:13px;line-height:1.8}.study-actions{display:flex;gap:10px;flex-wrap:wrap}.study-home button,.study-dialog button,.study-question button{background:#175e58;color:white;border:0;border-radius:9px;padding:11px 15px;font:inherit;font-size:13px;cursor:pointer}.study-home button:disabled{opacity:.5;cursor:default}.study-dialog{width:min(880px,calc(100% - 24px));max-height:88vh;padding:26px;border:1px solid #bad0cd;border-radius:20px;background:#f8fcfb;color:#193d3b;overflow:auto}.study-dialog::backdrop{background:#102c3bd0}.study-dialog header{display:flex;justify-content:space-between;align-items:center;gap:14px}.study-dialog h2{font-size:22px}.study-dialog h3{margin-top:28px}.study-dialog label{display:flex;gap:12px;align-items:center;margin:10px 0;font-size:13px}.study-dialog select{padding:8px;max-width:100%;border:1px solid #b5cdca;border-radius:8px;background:white;color:#173d3b}.study-map-row{display:grid;grid-template-columns:minmax(0,1fr) 100px auto;align-items:center;gap:15px;padding:14px 0;border-bottom:1px solid #d9e6e3}.study-map-row small,.study-saved-row small{display:block;color:#526e6a;font-size:11px;margin-top:5px}.study-map-row progress{display:block;width:100%;height:7px;accent-color:#247f72;margin-top:7px}.study-map-row b{font-size:13px}.study-saved-row{padding:18px 0;border-bottom:1px solid #d9e6e3;overflow-wrap:anywhere}.study-saved-row p{white-space:pre-line}.study-saved-row blockquote{margin:10px 0;padding:10px 14px;background:#e8f2ef;white-space:pre-wrap;font-size:13px}.study-saved-row button{margin-top:12px}.study-question{margin:18px 0;color:#254845}.study-question fieldset{border:0;padding:0;margin:0}.study-question legend{font-size:13px;margin-bottom:10px}.study-question legend small{color:#657b76}.study-question [data-confidence]{background:#f0f5f3;color:#315d54;border:1px solid #b7ccc5;margin-right:8px}.study-question [aria-pressed=true]{background:#175e58;color:white;border-color:#175e58}.study-question button:disabled{cursor:default;opacity:.7}.study-question details{font-size:13px;margin-top:12px}.study-question summary{cursor:pointer;padding:8px 0}.study-question label{display:block;margin:8px 0}.study-question textarea{display:block;box-sizing:border-box;width:100%;padding:12px;border:1px solid #b7ccc5;border-radius:9px;font:inherit;background:#fff;color:#173d3b;resize:vertical;margin-bottom:10px}.study-question #studySchedule,.study-question #studySaveStatus{font-size:12px;line-height:1.7}.study-home button:focus-visible,.study-dialog button:focus-visible,.study-question button:focus-visible{outline:3px solid #e1a33b;outline-offset:3px}@media(max-width:540px){.study-dialog{padding:18px}.study-map-row{grid-template-columns:minmax(0,1fr) 70px;gap:10px}.study-map-row button{grid-column:1/-1;justify-self:start}.study-actions{flex-direction:column}.study-home{padding:18px}.study-dialog h2{font-size:18px}}

/* Learning tools share the ward palette; explanations retain the paper surface. */
.study-home{border:1px solid #395d63;border-radius:14px;background:#102c32;color:#e6f2ee;margin:16px 0 0;padding:20px}
.study-home .study-kicker{color:#9ddfcf;font:600 10px/1.7 'Noto Sans JP',sans-serif;letter-spacing:.14em}
.study-home h2{font-size:19px;line-height:1.6;margin:8px 0;color:#e6f2ee}
.study-home p{font-size:13px;font-weight:400;line-height:1.9;color:#b2cac5;margin:8px 0 16px}
.study-actions{display:grid;grid-template-columns:minmax(0,1fr);gap:8px}
.study-home button{min-height:48px;padding:12px 14px;font-size:14px;font-weight:600;border-radius:10px;border:1px solid #638b89;background:#193b40;color:#b9f2df}
.study-home #studyStart:not(:disabled){background:#8be6cf;color:#092e29;border-color:#8be6cf}
.study-home #studyStart:disabled{background:transparent;border-color:#395d63;color:#b2cac5;opacity:1;cursor:default;font-weight:400;font-size:12px}
.study-home :focus-visible{outline:3px solid #aaf2df;outline-offset:3px}
.study-dialog{width:min(900px,calc(100% - 32px));max-height:calc(100dvh - 32px);padding:0 28px 28px;border:1px solid #9bbab0;border-radius:16px;background:#f6f9f3;color:#193d3b;box-shadow:0 24px 64px #0004;overscroll-behavior:contain;scroll-padding-top:170px}
.study-dialog::backdrop{background:#031318dc}
.study-dialog>header{position:sticky;top:0;z-index:3;padding:22px 0 16px;background:#f6f9f3;gap:18px;border-bottom:1px solid #c9dbce}
.study-dialog .study-kicker{font-size:10px;letter-spacing:.12em;color:#52736b}
.study-dialog h2{font-size:23px;line-height:1.6;margin:5px 0 0;padding:0;font-weight:700}
.study-dialog #studyClose{flex-shrink:0;display:grid;place-items:center;width:44px;height:44px;min-height:44px;padding:0;border:1px solid #b6ccbe;border-radius:10px;background:#e6efe5;color:#264e44;font-size:24px}
.study-dialog>p,.study-dialog section>p{font-size:14px;line-height:1.9;color:#526b61}
.study-dialog label{display:grid;grid-template-columns:130px minmax(0,1fr);gap:12px;align-items:center;font-size:13px;margin:16px 0;max-width:500px}
.study-dialog select{min-width:0;width:100%;min-height:48px;padding:10px 12px;font-size:16px;border:1px solid #abc6b5;background:#fff;border-radius:10px}
.study-jump{position:sticky;top:103px;z-index:2;display:flex;gap:8px;padding:12px 0;background:#f6f9f3}
.study-jump button{flex:1;min-height:46px;border:1px solid #aec5b5;border-radius:10px;background:#e7f0e6;color:#214f42;font-weight:600;font-size:13px}
.study-dialog section{scroll-margin-top:170px;padding-top:8px}
.study-dialog h3{font-size:20px;line-height:1.6;margin:24px 0 12px}
.study-dialog #studySavedSection{border-top:1px solid #b9cebf;margin-top:28px}
.study-dialog button{min-height:44px;font-size:13px;line-height:1.7;touch-action:manipulation}
.study-map-row{grid-template-columns:minmax(0,1fr) 100px 110px;gap:16px;padding:16px;border:1px solid #cdded0;border-radius:12px;background:white;margin:10px 0}
.study-map-row b{font-size:14px;font-weight:600;line-height:1.7}
.study-map-row small,.study-saved-row small{font-size:12px;line-height:1.8;color:#526c5f}
.study-map-row>div{min-width:0;overflow-wrap:anywhere}
.study-map-row button{background:#e8f3e8;color:#1d604b;border:1px solid #abc9b5;font-weight:600}
.study-map-row progress{height:7px;accent-color:#287d5d;margin-top:8px}
.study-saved-row{border:1px solid #c7dacb;border-radius:12px;padding:18px;background:white;margin:12px 0}
.study-saved-row p{font-size:15px;line-height:1.95;color:#294a40}
.study-saved-row blockquote{padding:14px;font-size:14px;line-height:1.9;border-left:3px solid #78a88b;border-radius:6px;background:#eff5ec}
.study-question{margin:22px 0 0;padding:18px 0 0;border-top:1px solid #cfddd0;color:#36564a}
.study-question legend{font-size:13px;line-height:1.8;font-weight:500;margin-bottom:12px}.study-question legend small{font-size:11px}
.study-question button{min-height:44px;font-size:13px;line-height:1.7;border-radius:10px;padding:11px 15px}
.study-question [data-confidence]{min-width:100px;margin-right:8px;font-weight:500}
.study-question [data-confidence][aria-pressed=true]{box-shadow:inset 0 0 0 2px #175e58;background:#dfeee0;color:#174b36;font-weight:700}
.study-question [data-confidence][aria-pressed=true]:before{content:'✓ ';font-weight:700}
.study-question summary{min-height:44px;padding:10px 0;color:#416759;line-height:1.8}
.study-question label{font-size:13px;line-height:1.85}.study-question textarea{font-size:16px;line-height:1.8}.study-question #studySchedule:empty{display:none}.study-question #studySaveStatus{display:block;margin-top:8px}
.study-dialog :focus-visible,.study-question :focus-visible{outline:3px solid #087263;outline-offset:3px}
@media(max-width:600px){
 .study-dialog{width:calc(100% - 20px);max-height:calc(100dvh - 20px);padding:0 16px max(20px,env(safe-area-inset-bottom));border-radius:14px;scroll-padding-top:160px}
 .study-dialog>header{padding:16px 0 12px;gap:12px}.study-dialog h2{font-size:19px}.study-dialog .study-kicker{font-size:9px}.study-jump{top:91px;padding:10px 0}.study-jump button{font-size:12px;padding:10px}.study-dialog>p,.study-dialog section>p{font-size:13px}.study-dialog label{grid-template-columns:1fr;gap:6px;max-width:none}.study-dialog section{scroll-margin-top:155px}.study-dialog h3{font-size:18px}
 .study-map-row{grid-template-columns:minmax(0,1fr) 70px;gap:12px;padding:14px}.study-map-row button{grid-column:1/-1;width:100%;justify-self:stretch}.study-map-row b{font-size:13px}.study-map-row small{font-size:11px}.study-saved-row{padding:14px}.study-home{padding:18px}.study-question [data-confidence]{min-width:0;max-width:calc(50% - 12px);padding:10px 14px}.study-question legend small{display:block}
}
@media(prefers-reduced-motion:reduce){.study-dialog *,.study-home *,.study-question *{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
.study-dialog .study-jump{position:relative;top:auto}.study-dialog{scroll-padding-top:130px}.study-dialog section{scroll-margin-top:130px}