@font-face{font-family:Jost IMAT;font-style:normal;font-weight:400 500;font-display:swap;src:url(../../../fonts/JostIMAT-Medium-3704.woff2) format("woff2")}@font-face{font-family:Jost IMAT;font-style:italic;font-weight:400 500;font-display:swap;src:url(../../../fonts/JostIMAT-MediumItalic-3704.woff2) format("woff2")}@font-face{font-family:Jost IMAT;font-style:normal;font-weight:600 900;font-display:swap;src:url(../../../fonts/JostIMATHeavy-Regular-3704.woff2) format("woff2")}@font-face{font-family:Jost IMAT;font-style:italic;font-weight:600 900;font-display:swap;src:url(../../../fonts/JostIMATHeavy-Italic-3704.woff2) format("woff2")}:root{--bg: #faf7f0;--surface: #fffefa;--ink: #141414;--ink-soft: #5e636e;--ink-faint: #8a8f98;--line: #e2dbcd;--brand: #1c2f4e;--brand-soft: #e9eef6;--priority: #b45309;--priority-soft: #fdf2e3;--blind: #b91c1c;--blind-soft: #fdecec;--reassure: #1d4ed8;--reassure-soft: #e8effc;--ok: #1e6b45;--dot-seen: #6b7684;--gold: #b8860b;--warn: #b45309;--bad: #a4161a;--pen: #c00000;--ic-ink: currentColor;--ic-wash: #e9e4db;--ic-wash-2: #cfc6b8;--ic-red: #c00000;--ic-ok: var(--ok);--ic-bad: var(--bad);--water: #00508f;--button: #1c2f4e;--on-button: #ffffff;--button-hover: #13213a;--exam-paper: #ffffff;--right-soft: #e4f0e8;--wrong-soft: #f7e3e3;--radius: 10px;--shadow: 0 1px 2px rgba(20, 40, 30, .06), 0 4px 16px rgba(20, 40, 30, .05);--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;--topbar-h: 57px;--star: #f4b400;--star-edge: #c98f00;--star-glow: rgba(244, 180, 0, .65);--star-bright: #ffd84d;--star-faint: #dde1e6;--slice-later: #dfe3df;--lively: 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button{padding:4px 12px;font-size:.85rem}.updatebar.clockbar{background:color-mix(in srgb,var(--gold) 16%,var(--surface));border-bottom-color:var(--gold);color:var(--ink)}.topbar{background:var(--bg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.topbar-inner{max-width:1200px;margin:0 auto;padding:10px clamp(16px,4vw,40px);display:flex;align-items:center;gap:10px 24px;min-width:0}.logo{flex:0 0 auto;font-weight:700;color:var(--brand);text-decoration:none;letter-spacing:.01em;display:inline-flex;align-items:center;gap:10px}.logo img{height:46px;width:auto;display:block;margin:-3px 0}.logo span{font-size:1.25rem}.topnav{display:flex;align-items:center;gap:2px;flex:1 1 auto;min-width:0}.topnav a{color:var(--ink);text-decoration:none;padding:10px 14px;border-radius:8px;font-size:1rem;white-space:nowrap}.topnav a>span{position:relative;display:inline-block}.topnav a:hover{background:color-mix(in srgb,var(--ink) 5%,transparent)}.topnav 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.stemlist{margin:0 0 10px;padding-left:26px;line-height:1.7}.stem .stemlist li{margin:2px 0}.stem .stemq{margin:0;font-weight:600}.options{display:grid;gap:8px;margin-bottom:18px}.opt{display:flex;gap:11px;align-items:flex-start;width:100%;text-align:left;padding:12px 14px;border:1px solid var(--line);border-radius:9px;background:var(--surface);cursor:pointer}@media(hover:hover){.opt:hover:not(:disabled){border-color:var(--brand);background:var(--brand-soft)}}.opt .letter{flex:0 0 24px;height:24px;border-radius:50%;background:var(--bg);border:1px solid var(--line);display:grid;place-items:center;font-size:.8rem;font-weight:700}.opt.chosen{border-color:var(--brand);background:var(--brand-soft)}.opt.chosen .letter{background:var(--brand);border-color:var(--brand);color:#fff}.opt.right{border-color:var(--ok);background:#eef8f1}.opt.right .letter{background:var(--ok);border-color:var(--ok);color:#fff}.opt.wrong{border-color:var(--bad);background:var(--blind-soft)}.opt.wrong .letter{background:var(--bad);border-color:var(--bad);color:#fff}.opt:disabled{cursor:default;opacity:1}.explain{border:1px solid var(--line);border-radius:9px;overflow:hidden;margin-bottom:16px}.explain .why-right{padding:16px;background:#f4faf6;border-bottom:1px solid var(--line)}[data-theme=dark] .explain .why-right{background:#1c2b23;border-bottom-color:#2c3c33}.explain .why-right h3{color:var(--ok);margin-bottom:8px}.explain .why-right .body{white-space:pre-wrap;font-size:.94rem}.explain .why-wrong{padding:16px}.explain .why-wrong h3{color:var(--ink-soft);margin-bottom:8px}.explain .why-wrong ul{margin:0;padding:0;list-style:none;display:grid;gap:7px}.explain .why-wrong li{font-size:.9rem;display:flex;gap:9px}.explain .why-wrong .l{flex:0 0 18px;font-weight:700;color:var(--ink-faint)}.deeper{font-size:.84rem;color:var(--ink-soft);margin-top:10px;padding-top:10px;border-top:1px dashed 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b{color:var(--brand)}.topicchips{display:flex;align-items:center;gap:2px;flex-wrap:wrap;min-height:20px}.morechip{background:none;border:1px dashed var(--line);border-radius:999px;padding:1px 8px;margin-left:2px;font-size:.76rem;font-weight:600;color:var(--ink-soft);cursor:pointer;line-height:1.5}.morechip:hover{border-style:solid;border-color:var(--brand);color:var(--brand)}.pager{display:flex;align-items:center;gap:12px;margin-top:12px}.pager button{padding:4px 12px;font-size:1rem;line-height:1.2}.count{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:7px 12px;font-size:.85rem;color:var(--ink-soft)}.count b{font-size:1.05rem;color:var(--ink);margin-right:3px}.count.warn{background:var(--blind-soft);border-color:#f3c9c9;color:var(--blind)}.count.warn 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env(safe-area-inset-bottom));background:color-mix(in srgb,var(--bg) 97%,transparent);border-top:1px solid var(--line);box-shadow:0 -10px 24px -18px #22324d59;transform:translateY(calc(100% + 16px));visibility:hidden;transition:transform .24s ease,visibility 0s linear .24s}.bottomnav.shown.svelte-12qhfyh{transform:none;visibility:visible;transition:transform .24s ease}.bottomnav.svelte-12qhfyh a:where(.svelte-12qhfyh){flex:1 1 0;min-width:0;min-height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:4px 2px 6px;font-size:.75rem;line-height:1.1;color:var(--ink-soft);text-decoration:none}.bottomnav.svelte-12qhfyh a:where(.svelte-12qhfyh)>span:where(.svelte-12qhfyh):last-child{position:relative}.bottomnav.svelte-12qhfyh 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