.site-nav{display:flex;gap:10px;padding:14px 0 0;flex-wrap:wrap}.nav-button{border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 18px;color:var(--ink);font-weight:700;cursor:pointer}.nav-button[aria-current="page"]{background:var(--blue);color:#fff;border-color:var(--blue)}.nav-count{display:inline-block;min-width:24px;border-radius:99px;background:#dceeea;color:#116b55;padding:0 6px;margin-right:6px;font-size:.85rem}.score{direction:ltr;unicode-bidi:isolate;font-variant-numeric:tabular-nums}.score-caption{font-weight:600}.learning-shell{padding:32px 0 65px;min-height:75vh}.learning-heading{font-size:clamp(2rem,5vw,3rem);margin:10px 0 14px;line-height:1.25;letter-spacing:-.025em}.learning-intro{color:var(--muted);max-width:720px;line-height:1.8}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:28px 0}.stat-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.stat-box strong{display:block;font-size:2rem;color:var(--blue);line-height:1.4}.stat-box span{color:var(--muted);font-size:.92rem}.progress-filters{display:flex;gap:14px;align-items:end;justify-content:space-between;flex-wrap:wrap;margin:24px 0}.filter-label{display:grid;gap:7px;font-weight:700}.filter-label select{font:inherit;color:var(--ink);padding:10px 34px 10px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;min-width:200px}.status-tabs{display:flex;gap:7px}.status-tabs button{border:1px solid var(--line);border-radius:10px;background:#fff;padding:11px 15px;cursor:pointer;font-weight:700;color:var(--muted)}.status-tabs button[aria-pressed="true"]{border-color:var(--blue);background:#edf3ff;color:var(--blue)}.learning-list{display:grid;gap:16px}.learning-item{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px}.learning-item h2{font-size:1.15rem;line-height:1.65;letter-spacing:0;margin:14px 0}.learning-meta{display:flex;gap:9px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:.85rem}.learning-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:15px}.learning-detail summary{cursor:pointer;font-weight:700;color:var(--blue);padding:10px 0}.learning-detail[open]{margin-top:10px}.learning-detail .review-explanation{margin:8px 0}.empty-state{text-align:center;padding:45px 24px;background:#fff;border:1px solid var(--line);border-radius:22px}.empty-state h2{margin:0 0 10px;font-size:1.6rem}.empty-state p{color:var(--muted);line-height:1.7;margin:0 auto 20px;max-width:560px}.storage-warning{border-radius:12px;padding:14px;background:#fff0db;color:#7c4b07;line-height:1.6}.timing-note{font-size:.85rem;line-height:1.6;color:var(--muted);margin:18px 0 0}.session-notice{background:#edf3ff;color:var(--blue);border-radius:12px;padding:12px 16px;margin-top:15px;line-height:1.6}button:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #23b998;outline-offset:3px}.quiz-brand{min-width:0}.quiz-brand>span{overflow-wrap:anywhere}.timer{direction:rtl;white-space:nowrap}.result-actions{flex-wrap:wrap}.results .score{margin-bottom:6px}
.question-image-button{display:block;width:100%;border:0;background:transparent;padding:0;margin:10px auto 26px;color:var(--blue);font-weight:700;cursor:zoom-in}.question-image-button .question-image{margin:0 auto 7px}.question-image-button span{display:block;font-size:.85rem}.viewer-open{overflow:hidden}.image-viewer{position:fixed;inset:0;z-index:80;background:rgba(6,17,36,.94);display:grid;grid-template-rows:auto 1fr;color:#fff}.image-viewer-bar{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;gap:16px}.image-viewer-stage{overflow:auto;overscroll-behavior:contain;padding:20px;display:flex;align-items:flex-start;justify-content:center;direction:ltr;touch-action:pan-x pan-y pinch-zoom}.image-viewer-stage img{display:block;width:min(1500px,150vw);max-width:none;height:auto;background:#fff;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
@media(max-width:600px){.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.stat-box{padding:16px}.progress-filters{align-items:stretch;flex-direction:column}.filter-label select{width:100%}.status-tabs button{flex:1}.learning-actions>.primary{width:100%}.learning-item{padding:17px}.learning-shell{padding-top:24px}.site-nav{padding-top:12px}.nav-button{flex:1;padding:11px}.quiz-brand{font-size:.93rem;align-items:flex-start;flex-direction:column;gap:7px}.timer{min-width:135px;padding:10px;font-size:1.05rem}.question-text{overflow-wrap:anywhere}.learning-actions>.secondary{flex:1}.score{font-size:3rem}.question-image-button span{font-size:.9rem}.image-viewer-stage{justify-content:flex-start;padding:12px}.image-viewer-stage img{width:1200px}.image-viewer-bar{position:sticky;top:0;background:#071322;z-index:2}}
.practice-estimate{margin:16px auto 0;max-width:540px;padding:12px 14px;border:1px dashed #b9c6dc;border-radius:14px;background:#fafbfe;text-align:right}
.practice-estimate p.estimate-line{margin:0;color:var(--ink);font-weight:700;font-size:1rem}.practice-estimate .estimate-value{font-size:1.15rem}
.practice-estimate p.estimate-label{margin:4px 0 0;color:#6b4a12;font-size:.86rem;font-weight:600}
.practice-estimate p.estimate-method{margin:6px 0 0;color:var(--muted);font-size:.82rem;line-height:1.55}
.practice-estimate p.estimate-line bdi{white-space:nowrap}
.practice-estimate p.estimate-method bdi{white-space:nowrap}