.study-main{padding-block:48px 72px;max-width:1180px}.study-heading{margin-bottom:38px;max-width:850px}.study-heading h1{font-size:clamp(36px,6vw,68px);line-height:1.4;margin:16px 0}.study-heading p{line-height:1.9}.study-heading .btn{margin-block:8px}.study-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;align-items:start}.study-card{border:1px solid var(--line);background:var(--ui-surface);padding:28px;border-radius:16px;min-width:0;scroll-margin-top:100px}.study-card h2{font-size:27px;line-height:1.5;margin:12px 0 22px}.study-card p{line-height:1.9}.study-card .kicker{font-size:10px;color:var(--muted)}.study-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.study-field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px;font-size:14px;min-width:0}.study-field input,.study-field textarea,.sticky-note textarea{width:100%;box-sizing:border-box;border:1px solid var(--line);background:var(--control);color:var(--ink);font:inherit;padding:12px;border-radius:8px;min-width:0}.study-field textarea{resize:vertical}.study-actions{display:flex;gap:8px;flex-wrap:wrap}.study-card button,.focus-shell button{cursor:pointer}.study-card button:disabled,.focus-shell button:disabled{opacity:.45;cursor:default}.timer-display{font:600 clamp(58px,8vw,92px)/1.3 var(--body-en),sans-serif;letter-spacing:-.05em;font-variant-numeric:tabular-nums;margin:20px 0}.tool-result{font-size:21px;font-weight:600;min-height:40px;overflow-wrap:anywhere}.plan-list{max-height:330px;overflow:auto;padding-inline-start:28px;line-height:2.2}.subject-links{display:flex;gap:10px;flex-wrap:wrap}.notes-grid{display:grid;gap:14px;margin-top:20px}.sticky-note{border:1px solid var(--line);padding:12px;background:var(--paper-soft);border-radius:8px}.sticky-note textarea{background:transparent;border:0;line-height:1.8;resize:vertical}.check-row{border-bottom:1px solid var(--line);padding:15px 0;display:flex;align-items:center;justify-content:space-between;gap:12px}.check-row label{display:flex;gap:14px;align-items:center;cursor:pointer;overflow-wrap:anywhere}.check-row input{width:22px;height:22px;accent-color:var(--ink);flex-shrink:0}.check-row label:has(:checked) span{text-decoration:line-through;color:var(--muted)}#check-form{margin-top:24px}.flash-answer{white-space:pre-wrap;padding:20px;background:var(--paper-soft);border-radius:8px;overflow-wrap:anywhere}#flash-deck{margin-top:22px}#flash-deck h3{overflow-wrap:anywhere}#flash-deck .btn{margin:4px}.memory-board{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-block:16px}.memory-card{aspect-ratio:1;border:1px solid var(--line);border-radius:8px;background:var(--control);color:var(--ink);font-size:27px;min-height:52px}.memory-card.matched{background:var(--paper-soft)}#achievement-canvas{display:block;width:min(100%,300px);height:auto;margin:24px auto;border-radius:10px}.wheel-wrap{position:relative;width:280px;max-width:100%;margin:0 auto 24px;padding-top:12px}.wheel-pointer{position:absolute;top:0;left:50%;transform:translateX(-50%);z-index:2;font-size:27px}.subject-wheel{width:280px;height:280px;max-width:100%;border-radius:50%;background:repeating-conic-gradient(#202020 0deg 25.714deg,#444 25.714deg 51.428deg);color:#fff;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:45px;border:5px solid var(--line);transition:transform 2.2s cubic-bezier(.15,.65,.15,1)}.subject-wheel small{font-size:14px}.wheel-label{position:absolute;top:50%;left:50%;font-size:11px;white-space:nowrap}.focus-page{background:#080808!important;color:#f5f5f5;--ink:#f5f5f5;--paper:#080808;--control:#151515;--line:#555;--muted:#ccc}.focus-page:before,.focus-page:after,.focus-page>.site-header,.focus-page>.footer{display:none!important}.focus-shell{max-width:680px;margin:0 auto;padding-block:16px;text-align:center}.focus-shell>.kicker{margin:40px 0 24px}.focus-shell .study-actions{justify-content:center}.focus-shell .study-field{text-align:start}.focus-shell h1{font-size:36px;margin:18px}.focus-shell .timer-display{font-size:clamp(72px,16vw,140px)}#focus-clock{font-size:25px;font-variant-numeric:tabular-nums;color:#bbb}.focus-shell .btn{background:#151515;color:#fff;border-color:#666}.focus-shell input{color:#fff;background:#151515}.study-card :focus-visible,.focus-shell :focus-visible{outline:2px solid var(--ink);outline-offset:4px}@media(max-width:760px){.study-grid{grid-template-columns:1fr}.study-card{padding:22px 16px}.study-main{padding-block:28px 48px}.study-heading h1{font-size:38px}.study-fields{gap:10px}.study-heading .btn{font-size:12px}.wheel-wrap{width:260px}.subject-wheel{width:260px;height:260px}}@media(prefers-reduced-motion:reduce){.subject-wheel{transition:none}}

.study-jumps{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0}.study-jumps a{border:1px solid var(--line);border-radius:24px;padding:8px 15px;background:var(--control);font-size:13px}.study-jumps a:hover{background:var(--control-hover)}.study-year{background:var(--ui-surface);border:1px solid var(--line);border-radius:12px;padding:20px;margin:24px 0}.study-year p{margin:0 0 12px}.study-year progress{display:block;width:100%;height:7px;accent-color:var(--ink);margin-bottom:14px}.study-year small{color:var(--muted)}