@import "https://fonts.googleapis.com/css2?family=BIZ+UDPGothic:wght@400;700&family=Zen+Kaku+Gothic+New:wght@400;700&display=swap";:root{--color-paper:#fafcfe;--color-paper-2:#f2f5f9;--color-paper-3:#e7ecf1;--color-ink:#0e141c;--color-muted:#4f565f;--color-rule:#ccd1d9;--color-rule-strong:#9199a4;--color-accent:#005bb8;--color-accent-soft:#e4f0ff;--color-accent-ink:#fafcfe;--color-focus:#006edb;--color-correct:#00722e;--color-correct-soft:#e7f7e9;--color-error:#c21919;--color-error-soft:#ffede9;--font-display:"BIZ UDPGothic", sans-serif;--font-body:"Zen Kaku Gothic New", sans-serif;--space-3xs:.125rem;--space-2xs:.25rem;--space-xs:.5rem;--space-sm:.75rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2.5rem;--space-2xl:4rem;--space-sticky-clearance:8rem;--text-xs:.75rem;--text-sm:.875rem;--text-base:1rem;--text-md:1.25rem;--text-lg:1.5625rem;--text-xl:1.953rem;--ease-out:cubic-bezier(.16, 1, .3, 1);--ease-in:cubic-bezier(.7, 0, .84, 0);--ease-in-out:cubic-bezier(.65, 0, .35, 1);--dur-micro:.12s;--dur-short:.18s;--rule-hairline:1px;--radius-sm:.25rem;--radius-md:.4rem;--z-sticky:200}@supports (color:lab(0% 0 0)){:root{--color-paper:lab(98.8343% -.248969 -1.10376);--color-paper-2:lab(96.5082% -.492364 -2.2042);--color-paper-3:lab(93.0218% -.729531 -3.3012);--color-ink:lab(6.14365% -.814647 -6.11669);--color-muted:lab(36.1548% -1.29382 -6.51922);--color-rule:lab(83.735% -.957191 -4.39297);--color-rule-strong:lab(62.8388% -1.36805 -6.55435);--color-accent:lab(37.8648% 10.5244 -64.9262);--color-accent-soft:lab(94.1401% -1.96907 -9.46388);--color-accent-ink:lab(98.8343% -.248969 -1.10376);--color-focus:lab(46.0394% 8.56912 -68.4233);--color-correct:lab(41.5195% -45.916 31.0557);--color-correct-soft:lab(95.6952% -7.39086 4.71013);--color-error:lab(42.332% 62.8445 47.7885);--color-error-soft:lab(95.0985% 8.96996 5.50118)}}*{box-sizing:border-box}html,body{background:var(--color-paper);min-width:320px;color:var(--color-ink);font-family:var(--font-body);font-size:var(--text-base);margin:0;overflow-x:clip}button,a{font:inherit}button{color:inherit}button:focus-visible,a:focus-visible{outline:3px solid var(--color-focus);outline-offset:2px}.app-shell{min-height:100dvh;padding-bottom:var(--space-sticky-clearance)}.topbar{justify-content:space-between;align-items:center;gap:var(--space-md);padding:var(--space-lg) clamp(var(--space-md), 4vw, var(--space-xl));border-bottom:var(--rule-hairline) solid var(--color-rule);display:flex}h1,h2{overflow-wrap:anywhere;min-width:0;font-family:var(--font-display);letter-spacing:-.025em;margin:0;font-style:normal}h1{font-size:clamp(var(--text-md), 5vw, var(--text-xl));font-weight:700}h2{font-size:var(--text-md);font-weight:700}.pdf-link{min-height:44px;color:var(--color-accent);text-underline-offset:var(--space-2xs);white-space:nowrap;align-items:center;text-decoration:underline;display:inline-flex}main{max-width:86rem;margin-inline:auto}.exam-tabs{border-bottom:var(--rule-hairline) solid var(--color-rule);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.exam-tabs button{background:var(--color-paper);white-space:nowrap;cursor:pointer;border:0;border-bottom:3px solid #0000;min-height:56px;font-weight:700}.exam-tabs button[aria-current=page]{color:var(--color-accent);border-bottom-color:var(--color-accent)}button:active{transform:translateY(1px)}.answer-sheet{padding:var(--space-lg) clamp(var(--space-md), 4vw, var(--space-xl))}.sheet-tools{gap:var(--space-md);padding-bottom:var(--space-lg);display:grid}.progress{margin:var(--space-xs) 0 0;color:var(--color-muted);font-variant-numeric:tabular-nums}.set-tabs{gap:var(--space-xs);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.set-tabs button{min-height:44px;padding-inline:var(--space-sm);border:var(--rule-hairline) solid var(--color-rule-strong);border-radius:var(--radius-sm);background:var(--color-paper);white-space:nowrap;cursor:pointer}.set-tabs button[aria-selected=true]{border-color:var(--color-accent);background:var(--color-accent-soft);color:var(--color-accent);font-weight:700}.answer-list{border-top:var(--rule-hairline) solid var(--color-rule)}.answer-row{align-items:center;gap:var(--space-md);padding:var(--space-sm) 0;border:0;border-bottom:var(--rule-hairline) solid var(--color-rule);content-visibility:auto;contain-intrinsic-size:4.75rem;grid-template-columns:minmax(4.5rem,auto) minmax(0,1fr);margin:0;display:grid}.answer-number{gap:var(--space-2xs);font-variant-numeric:tabular-nums;flex-direction:column;width:100%;padding:0;font-weight:700;display:flex}.result-word{font-size:var(--text-xs);color:var(--color-muted)}.answer-row[data-result=correct] .answer-number,.answer-row[data-result=correct] .result-word{color:var(--color-correct)}.answer-row[data-result=incorrect] .answer-number,.answer-row[data-result=incorrect] .result-word{color:var(--color-error)}.answer-options{gap:var(--space-xs);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.answer-option{border:var(--rule-hairline) solid var(--color-rule-strong);border-radius:var(--radius-sm);background:var(--color-paper);min-height:52px;font-family:var(--font-display);font-size:var(--text-lg);cursor:pointer;transition:transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out);line-height:1}.answer-option[aria-pressed=true]{border-color:var(--color-accent);background:var(--color-accent-soft);color:var(--color-accent);font-weight:700}.answer-row[data-result=correct] .answer-option[aria-pressed=true]{border-color:var(--color-correct);background:var(--color-correct-soft);color:var(--color-correct)}.answer-row[data-result=incorrect] .answer-option[aria-pressed=true]{border-color:var(--color-error);background:var(--color-error-soft);color:var(--color-error);text-decoration:line-through;text-decoration-thickness:2px}button:disabled{opacity:.48;cursor:not-allowed}[aria-busy=true]{cursor:wait}[data-state=error]{border-color:var(--color-error)}[data-state=success]{border-color:var(--color-correct)}.grade-bar{z-index:var(--z-sticky);inset-inline:0;gap:var(--space-sm);padding:var(--space-sm) max(var(--space-md), env(safe-area-inset-right)) max(var(--space-sm), env(safe-area-inset-bottom)) max(var(--space-md), env(safe-area-inset-left));border-top:var(--rule-hairline) solid var(--color-rule-strong);background:var(--color-paper);display:grid;position:fixed;bottom:0}.score{justify-content:space-between;align-items:center;gap:var(--space-md);font-variant-numeric:tabular-nums;display:flex}.score span{color:var(--color-muted)}.grade-actions{gap:var(--space-xs);grid-template-columns:minmax(0,2fr) minmax(0,1fr);display:grid}.grade-button,.reset-button{min-height:48px;padding-inline:var(--space-md);border-radius:var(--radius-sm);white-space:nowrap;cursor:pointer;transition:transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out)}.grade-button{border:var(--rule-hairline) solid var(--color-accent);background:var(--color-accent);color:var(--color-accent-ink);font-weight:700}.reset-button{border:var(--rule-hairline) solid var(--color-rule-strong);background:var(--color-paper);color:var(--color-muted)}footer{padding:var(--space-xl) clamp(var(--space-md), 4vw, var(--space-xl));color:var(--color-muted);font-size:var(--text-sm);border-top:var(--rule-hairline) solid var(--color-rule)}@media (hover:hover) and (pointer:fine){.answer-option:hover,.set-tabs button:hover,.reset-button:hover,.exam-tabs button:hover{background:var(--color-paper-2)}.grade-button:not(:disabled):hover{transform:translateY(-1px)}}@media (min-width:40rem){.set-tabs{grid-template-columns:repeat(7,minmax(0,1fr))}.sheet-tools{grid-template-columns:minmax(12rem,auto) minmax(0,1fr);align-items:end}.grade-bar{grid-template-columns:auto minmax(26rem,38rem);align-items:center}}@media (min-width:60rem){.exam-tabs{grid-template-columns:12rem 12rem minmax(0,1fr)}.answer-list{column-gap:var(--space-xl);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.topbar{padding-block:var(--space-xl)}}@media (prefers-reduced-motion:reduce){*,:before,:after{animation-duration:var(--dur-micro)!important;transition-duration:var(--dur-micro)!important;animation-iteration-count:1!important}}