.quiz-shell{--qsh-paper:var(--bg,#f3efe6);--qsh-paper2:var(--bg-warm,#f8f5ee);--qsh-card:var(--card,#ffffff);--qsh-ink:var(--text,#2b2a28);--qsh-ink2:var(--text-secondary,#6b6a63);--qsh-ink3:var(--text-muted,#9c9a90);--qsh-line:var(--border,#e9e5db);--qsh-line2:var(--border-visible,#ddd8cb);--qsh-accent:var(--accent,#d9692a);--qsh-accent-soft:color-mix(in srgb,var(--accent,#d9692a) 16%,var(--card,#ffffff));--qsh-accent-ink:color-mix(in srgb,var(--accent,#d9692a) 72%,var(--text,#2b2a28));--qsh-teal:#4e8f86;--qsh-teal-soft:#ddeae6;--qsh-teal-ink:#346a62;--qsh-blue-ink:#3f6483;--qsh-chip-fill:#1c1b19;--qsh-chip-text:#ffffff;--qsh-topbar-h:52px;--qsh-rail-w:320px;--qsh-r:8px;--qsh-sans:var(--font-hanken),var(--font-noto),"Hiragino Sans",system-ui,sans-serif;--qsh-serif:var(--font-noto-serif),"Hiragino Mincho ProN","Yu Mincho",serif;--qsh-mono:var(--font-space-mono),ui-monospace,"SF Mono",monospace;font-family:var(--qsh-sans)}[data-theme=dark] .quiz-shell,html.dark .quiz-shell{--qsh-teal:#5ea99e;--qsh-teal-soft:rgba(94,169,158,0.18);--qsh-teal-ink:#8fc7be;--qsh-blue-ink:#8fb3d1;--qsh-chip-fill:#f4f1ea;--qsh-chip-text:#1c1b19}.qsh-topbar{position:sticky;top:0;z-index:950;gap:12px;height:var(--qsh-topbar-h);padding:0 14px 0 10px;background:color-mix(in srgb,var(--qsh-paper) 97%,transparent);border-bottom:1px solid var(--qsh-line)}.qsh-menubtn,.qsh-topbar{display:flex;align-items:center}.qsh-menubtn{width:34px;height:34px;border-radius:9px;flex:none;border:1px solid var(--qsh-line2);background:var(--qsh-card);cursor:pointer;color:var(--qsh-ink2);justify-content:center}.qsh-menubtn:hover{color:var(--qsh-accent);border-color:var(--qsh-accent)}.qsh-menubtn.on{background:var(--qsh-accent-soft);border-color:transparent;color:var(--qsh-accent-ink)}.qsh-menubtn svg{width:17px;height:17px}.qsh-brand{gap:9px;text-decoration:none}.qsh-brand,.qsh-brand .qsh-logo{display:flex;align-items:center;flex:none}.qsh-brand .qsh-logo{width:27px;height:27px;border-radius:7px;background:var(--qsh-accent);color:#fff;justify-content:center;font-size:15px}.qsh-brand .qsh-name{font-weight:800;font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--qsh-ink);white-space:nowrap}.qsh-gcrumb{min-width:0;overflow:hidden;display:flex;align-items:center;font-size:12.5px;color:var(--qsh-ink3);white-space:nowrap}.qsh-gcrumb a{color:var(--qsh-ink2);text-decoration:none}.qsh-gcrumb a:hover{color:var(--qsh-accent-ink)}.qsh-spacer{flex:1}.qsh-tnav{display:flex;align-items:center;gap:2px}.qsh-tnav a,.qsh-tnav>button{display:inline-flex;align-items:center;justify-content:center;gap:6px;flex:none;white-space:nowrap;font-family:var(--qsh-sans);font-size:12px;font-weight:600;color:var(--qsh-ink2);text-decoration:none;background:transparent;border:none;cursor:pointer;padding:7px 9px;border-radius:var(--qsh-r)}.qsh-tnav a:hover,.qsh-tnav>button:hover{background:var(--qsh-accent-soft);color:var(--qsh-accent-ink)}.qsh-tnav svg{width:14px;height:14px}.qsh-tnav .qsh-util-label{display:none}@media (min-width:1180px){.qsh-tnav .qsh-util-label{display:inline}}.qsh-session-badge{flex:none;font-size:10.5px;font-weight:800;letter-spacing:.08em;color:var(--qsh-teal-ink);background:var(--qsh-teal-soft);border-radius:14px;padding:4px 10px;white-space:nowrap}.qsh-layout{display:grid;grid-template-columns:var(--qsh-rail-w) minmax(0,1fr);align-items:start}.qsh-layout.railcollapsed{grid-template-columns:0 minmax(0,1fr)}.qsh-layout.railcollapsed .qsh-rail{border-right:none}.qsh-rail{position:sticky;top:var(--qsh-topbar-h);height:calc(100dvh - var(--qsh-topbar-h));overflow:hidden;border-right:1px solid var(--qsh-line);background:var(--qsh-paper2)}.qsh-rail,.qsh-rail-inner{display:flex;flex-direction:column}.qsh-rail-inner{width:var(--qsh-rail-w);height:100%}.qsh-rail-head{padding:17px 18px 14px;border-bottom:1px solid var(--qsh-line);flex:none}.qsh-rail-head .qsh-wm{font-family:var(--qsh-serif);font-weight:600;font-size:16px;letter-spacing:.02em;color:var(--qsh-ink)}.qsh-rail-head .qsh-ctx{font-size:11px;color:var(--qsh-ink3);margin-top:4px;font-weight:600}.qsh-modes{display:flex;gap:5px;padding:13px 16px 6px;flex:none}.qsh-modes button{flex:1;font-family:var(--qsh-sans);font-weight:700;font-size:12px;color:var(--qsh-ink2);background:transparent;border:1px solid transparent;border-radius:7px;padding:7px 0;cursor:pointer}.qsh-modes button.on,.qsh-modes button:hover{background:var(--qsh-card)}.qsh-modes button.on{border-color:var(--qsh-line2);color:var(--qsh-ink);box-shadow:0 1px 2px rgba(0,0,0,.04)}.qsh-rail-sec{display:flex;align-items:center;justify-content:space-between;padding:8px 18px 6px;flex:none}.qsh-rail-sec .qsh-sec-l{font-weight:800;font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--qsh-ink3)}.qsh-rail-sec .qsh-sec-r{font-family:var(--qsh-mono);font-size:10px;color:var(--qsh-ink3)}.qsh-tree{flex:1;overflow-y:auto;padding:0 10px 12px}.qsh-cat{margin-bottom:2px}.qsh-cat-head{width:100%;display:flex;align-items:center;gap:9px;padding:10px 9px;border-radius:8px;cursor:pointer;background:transparent;border:none;text-align:left;font-family:var(--qsh-sans)}.qsh-cat-head:hover{background:var(--qsh-card)}.qsh-cat-head .qsh-chev{width:15px;height:15px;flex:none;color:var(--qsh-ink3);display:flex}.qsh-cat-head .qsh-chev svg{width:15px;height:15px}.qsh-cat-head .qsh-swatch{width:8px;height:8px;border-radius:3px;flex:none}.qsh-cat-head .qsh-cname{flex:1;min-width:0;font-weight:700;font-size:12.5px;color:var(--qsh-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.qsh-cat-head .qsh-csum{font-family:var(--qsh-mono);font-size:10px;color:var(--qsh-ink3);flex:none}.qsh-cat-body{overflow:hidden;padding-left:6px}.qsh-cat:not(.open) .qsh-cat-body{height:0}.qsh-set{width:100%;display:flex;align-items:center;gap:10px;padding:8px 9px 8px 12px;border-radius:8px;cursor:pointer;position:relative;margin:1px 0;background:transparent;border:none;text-align:left;font-family:var(--qsh-sans)}.qsh-set:before{content:"";position:absolute;left:2px;top:9px;bottom:9px;width:3px;border-radius:3px;background:transparent}.qsh-set .qsh-chip,.qsh-set:hover{background:var(--qsh-card)}.qsh-set .qsh-chip{width:25px;height:25px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;font-family:var(--qsh-mono);font-weight:700;font-size:11.5px;border:1px solid var(--qsh-line2);color:var(--qsh-ink2)}.qsh-set .qsh-chip svg{width:13px;height:13px}.qsh-set.done .qsh-chip{background:var(--qsh-teal-soft);border-color:transparent;color:var(--qsh-teal-ink)}.qsh-set.active{background:var(--qsh-card);box-shadow:0 2px 9px -4px rgba(0,0,0,.16)}.qsh-set.active:before{background:var(--qsh-accent)}.qsh-set.active .qsh-chip{background:var(--qsh-chip-fill);border-color:var(--qsh-chip-fill);color:var(--qsh-chip-text)}.qsh-set .qsh-set-body{min-width:0;flex:1}.qsh-set .qsh-tt{font-size:12px;font-weight:600;color:var(--qsh-ink);line-height:1.25}.qsh-set .qsh-tt,.qsh-set .qsh-ty{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.qsh-set .qsh-ty{font-size:10px;color:var(--qsh-ink3);margin-top:1px}.qsh-set .qsh-prog{flex:none;font-family:var(--qsh-mono);font-size:9.5px;color:var(--qsh-ink3)}.qsh-set.done .qsh-prog{color:var(--qsh-teal-ink)}.qsh-set.active .qsh-prog{color:var(--qsh-accent-ink);font-weight:700}.qsh-toc-item{width:100%;display:flex;align-items:center;gap:10px;padding:9px 9px 9px 12px;border-radius:8px;cursor:pointer;position:relative;margin:1px 0;background:transparent;border:none;text-align:left;font-family:var(--qsh-sans)}.qsh-toc-item:before{content:"";position:absolute;left:2px;top:9px;bottom:9px;width:3px;border-radius:3px;background:transparent}.qsh-toc-item:hover{background:var(--qsh-card)}.qsh-toc-item .qsh-toc-n{flex:none;font-family:var(--qsh-mono);font-weight:700;font-size:10px;color:var(--qsh-ink3);width:20px}.qsh-toc-item .qsh-toc-t{flex:1;min-width:0;font-size:12px;font-weight:600;color:var(--qsh-ink);line-height:1.3;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.qsh-toc-item.active{background:var(--qsh-card);box-shadow:0 2px 9px -4px rgba(0,0,0,.16)}.qsh-toc-item.active:before{background:var(--qsh-accent)}.qsh-toc-item.active .qsh-toc-n{color:var(--qsh-accent-ink)}.qsh-rail-empty{padding:18px;font-size:11.5px;color:var(--qsh-ink3);line-height:1.6}.qsh-foot{flex:none;border-top:1px solid var(--qsh-line);padding:13px 18px;background:var(--qsh-paper2)}.qsh-foot-row{width:100%;display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;background:transparent;border:none;padding:0;cursor:pointer;font-family:var(--qsh-sans)}.qsh-foot-row .qsh-foot-l{font-weight:800;font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--qsh-ink3)}.qsh-foot-row:hover .qsh-foot-l{color:var(--qsh-accent-ink)}.qsh-foot-row .qsh-foot-v{font-family:var(--qsh-mono);font-size:11px;color:var(--qsh-ink);font-weight:700}.qsh-bar{height:6px;border-radius:6px;background:var(--qsh-line);overflow:hidden}.qsh-bar i{display:block;height:100%;width:0;background:var(--qsh-accent);border-radius:6px;transform-origin:left}.qsh-reset-dock{margin-top:11px}.qsh-scrim{position:fixed;inset:var(--qsh-topbar-h) 0 0 0;background:rgba(28,27,25,.38);z-index:940;border:none;padding:0;cursor:pointer}.qsh-main{min-width:0}.qsh-main .main-content,.qsh-main .main-content.has-subnav,.qsh-main .main-content.has-subnav-grammar{padding-top:28px}.qsh-main .view-home{min-height:calc(100dvh - var(--qsh-topbar-h) - 28px)}.qsh-main [id^=ov-sec-]{scroll-margin-top:calc(var(--qsh-topbar-h) + 14px)}@media (max-width:1000px){.quiz-shell{--qsh-rail-w:288px}}@media (max-width:760px){.qsh-layout,.qsh-layout.railcollapsed{grid-template-columns:minmax(0,1fr)}.qsh-rail{display:none;position:fixed;left:0;top:var(--qsh-topbar-h);bottom:0;height:auto;width:min(320px,86vw);z-index:945;border-right:1px solid var(--qsh-line2);box-shadow:14px 0 40px -18px rgba(0,0,0,.35)}.qsh-layout[data-mobile-open] .qsh-rail{display:flex}.qsh-rail-inner{width:100%}.qsh-gcrumb{display:none}}@media print{.qsh-rail,.qsh-scrim,.qsh-topbar{display:none}}