:root{--navy:#143d5b;--blue:#164f7b;--teal:#008f91;--ink:#20384c;--muted:#667b8b;--line:#d6e2ea;--paper:#fff;--bg:#f2f6f8}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,'Apple SD Gothic Neo',sans-serif}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--blue)}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:3px}button,.file-label{min-height:44px;padding:10px 15px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--blue);font-weight:650}.primary{background:var(--blue);color:white;border-color:var(--blue)}.skip{position:absolute;left:15px;top:-100px;z-index:50;background:white;padding:12px}.skip:focus{top:10px}.topbar{position:sticky;top:0;z-index:15;display:flex;align-items:center;justify-content:space-between;gap:12px;height:76px;padding:12px 28px;border-bottom:1px solid var(--line);background:#fff}.brand-lockup{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--navy)}.brand-symbol{display:grid;place-items:center;width:43px;height:43px;border-radius:12px;background:var(--blue);color:#fff;font-size:15px;font-weight:800;line-height:1.1}.brand-lockup b{display:block;font-size:23px;letter-spacing:-.04em}.brand-lockup small{display:block;font-size:10px;font-weight:750;letter-spacing:.14em;color:var(--muted)}.top-caption{font-size:13px;color:var(--muted)}#catalog-toggle{display:none}.app-grid{display:grid;grid-template-columns:284px minmax(0,1fr);max-width:1500px;margin:auto}.catalog-panel{position:sticky;top:76px;height:calc(100dvh - 76px);display:flex;flex-direction:column;border-right:1px solid var(--line);background:#fbfdfe;padding:22px 16px 12px}.catalog-top{display:flex;align-items:center;justify-content:space-between}.catalog-top h2{font-size:17px;margin:0 0 15px}#catalog-close{display:none}.search-label{font-size:12px;color:var(--muted);margin-bottom:6px}.catalog-panel input{width:100%;min-height:46px;border:1px solid #c4d5e1;border-radius:10px;padding:10px 12px;color:var(--ink);background:white}.filters{display:flex;flex-wrap:wrap;gap:5px;margin-top:12px}.filters button{font-size:12px;min-height:36px;padding:7px 9px;border-radius:7px}.filters [aria-pressed=true]{background:var(--blue);color:#fff;border-color:var(--blue)}#search-count{font-size:12px;color:var(--muted);margin:13px 2px 8px}.catalog-list{overflow:auto;min-height:0;overscroll-behavior:contain}.catalog-link{display:block;text-decoration:none;padding:12px 10px;border-radius:9px;margin:3px 0;border:1px solid transparent;color:var(--ink);line-height:1.5}.catalog-link:hover{background:#ecf3f8}.catalog-link[aria-current=true]{background:#e7f1f8;border-color:#a6c7dc}.catalog-q{display:block;font-size:11px;font-weight:800;letter-spacing:.04em;color:var(--blue);margin-bottom:3px}.catalog-title{font-size:14px;font-weight:650}.catalog-state{display:block;font-size:11px;color:#087d7e;min-height:16px}.app-main{min-width:0;padding:34px clamp(20px,4vw,60px) 80px;max-width:1160px}.eyebrow{font-size:11px;font-weight:800;letter-spacing:.11em;color:var(--teal)}.home-title{font-size:clamp(28px,4vw,40px);line-height:1.3;letter-spacing:-.045em;color:var(--navy);margin:10px 0}.home-lead{color:var(--muted);margin:0 0 28px}.continue-card{padding:25px 27px;border-radius:16px;background:#164f7b;color:#fff;box-shadow:0 8px 28px #143d5b0c}.continue-card p{color:#d0e5f2;font-size:13px;margin:0 0 8px}.continue-card h2{font-size:21px;line-height:1.5;margin:0 0 20px}.continue-card button{border:0;background:white;color:var(--blue)}.continue-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.continue-actions .secondary{background:#ffffff12;border:1px solid #ffffff55;color:white}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:21px 0 34px}.stat-card{border:1px solid var(--line);background:white;border-radius:13px;padding:19px 17px}.stat-card strong{font-size:27px;line-height:1.1;color:var(--blue);font-weight:760}.stat-card span{font-size:12px;color:var(--muted);margin-left:4px}.stat-card p{font-size:12px;color:var(--muted);margin:9px 0 0}.section-heading{display:flex;justify-content:space-between;align-items:baseline;margin:0 0 14px}.section-heading h2{font-size:20px;color:var(--navy);margin:0}.section-heading span{font-size:12px;color:var(--muted)}.part-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.part-card{display:block;padding:21px 20px;border:1px solid var(--line);background:#fff;border-radius:13px;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}.part-card:hover{border-color:#80b2cb;transform:translateY(-2px)}.part-card .part-index{font-size:10px;letter-spacing:.12em;font-weight:750;color:var(--teal)}.part-card h3{margin:9px 0 8px;font-size:20px;color:var(--navy)}.part-card p{font-size:12px;color:var(--muted);margin:0}.reader-toolbar{position:sticky;top:88px;z-index:8;background:#fffffff5;border:1px solid var(--line);border-radius:13px;padding:12px 15px;display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap;box-shadow:0 5px 18px #143d5b06}.reader-ident{min-width:140px;flex:1}.reader-ident b{display:block;font-size:12px;color:var(--teal)}#reader-topic{font-size:14px;font-weight:650}.reader-buttons{display:flex;gap:6px;flex-wrap:wrap}.reader-buttons button{font-size:12px;padding:9px 11px;min-height:40px}.reader-buttons [aria-pressed=true]{color:var(--teal);background:#ecf8f7;border-color:#a4d3ce}.reader-pagination{display:flex;gap:8px;align-items:center;justify-content:flex-end;margin:14px 0}#course{padding:0!important;max-width:none!important;margin:0!important}.app-main .question{margin-bottom:35px;scroll-margin-top:160px}.app-main .question-head{padding-top:22px}.app-main .reading{max-width:780px}.app-main .review{max-width:780px;margin:32px auto}.app-main .review h1{font-size:27px}.app-main .reading.native-reading{max-width:780px}.app-main .r3-frame-original{max-width:780px}.loading-panel,.empty-state{padding:42px 24px;text-align:center;border:1px dashed #b3cbd9;border-radius:13px;margin:24px 0;background:#fff;color:var(--muted)}.loading-dot{display:inline-block;width:8px;height:8px;background:var(--teal);border-radius:50%;margin-right:8px}.view-title{font-size:30px;color:var(--navy);margin:0 0 10px}.view-lead{color:var(--muted);font-size:14px;margin:0 0 22px}.review-link{display:block;padding:20px 22px;border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:10px;background:white;margin:12px 0;text-decoration:none;font-size:15px;line-height:1.75}.settings-card{padding:25px;border:1px solid var(--line);border-radius:13px;background:white;margin:18px 0}.settings-card h2{font-size:18px;margin:0 0 10px}.settings-card p,.settings-card li{font-size:14px;line-height:1.85;color:var(--muted)}.settings-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.file-label{display:inline-flex;align-items:center;cursor:pointer}.settings-card input[type=file]{display:block;max-width:100%;margin-top:12px;font-size:14px}.app-message{position:relative;margin:0 0 20px;padding:14px 17px;border:1px solid #a4d3ce;background:#eefaf7;color:#126663;border-radius:10px;font-size:14px;line-height:1.7}.app-message.error{background:#fff5e7;border-color:#e6c89d;color:#7a4c16}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:20;display:flex;justify-content:center;gap:8px;background:#fffffff5;border-top:1px solid var(--line);padding:8px 14px calc(8px + env(safe-area-inset-bottom));backdrop-filter:blur(12px)}.bottom-nav button{border:0;background:transparent;min-width:110px;border-radius:9px;font-size:13px;color:var(--muted)}.bottom-nav button[aria-current=page]{color:var(--blue);background:#eaf2f8}.catalog-backdrop{display:none}.noscript{padding:20px;background:#fff5e7;border:1px solid #e6c89d;margin:20px;color:#7a4c16}.noscript a{display:inline-block;padding:8px}.version-note{font-size:11px;color:var(--muted);margin-top:24px}html{scroll-padding-top:165px} @media(min-width:900px){.bottom-nav{left:284px}.catalog-panel{padding-bottom:22px}.reader-toolbar{top:88px}} @media(max-width:1100px) and (min-width:900px){.app-grid{grid-template-columns:250px minmax(0,1fr)}.bottom-nav{left:250px}.app-main{padding:28px 22px 90px}.part-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stats-grid{gap:8px}.stat-card{padding:16px 12px}} @media(max-width:899px){.topbar{height:66px;padding:10px 16px}.brand-lockup b{font-size:21px}.brand-symbol{width:38px;height:38px;border-radius:10px}.top-caption{display:none}#catalog-toggle{display:block;padding:8px 12px}.app-grid{display:block}.app-main{padding:24px 16px 100px;max-width:850px;margin:auto}.catalog-panel{position:fixed;z-index:40;top:0;left:0;bottom:0;height:100dvh;width:min(340px,88vw);transform:translateX(-110%);transition:transform .18s;padding-top:calc(18px + env(safe-area-inset-top));box-shadow:15px 0 60px #143d5b22}.catalog-open .catalog-panel{transform:translateX(0)}#catalog-close{display:block;font-size:13px;margin:0 0 12px;padding:6px 10px}.catalog-open .catalog-backdrop{display:block;position:fixed;inset:0;background:#16364a66;border:0;border-radius:0;z-index:35}.catalog-open{overflow:hidden}.stats-grid{gap:8px;margin-bottom:28px}.stat-card{padding:16px 11px}.stat-card strong{font-size:24px}.stat-card p{font-size:11px}.part-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.part-card{padding:18px 16px}.reader-toolbar{top:76px;padding:10px 12px}.reader-buttons{width:100%}.reader-buttons button{flex:1;padding:7px 8px}.reader-ident{width:100%}.reader-pagination{justify-content:space-between}.reader-pagination button{flex:1}.bottom-nav{gap:3px;padding-top:7px}.bottom-nav button{min-width:0;flex:1;font-size:12px;padding:9px 6px}.continue-card{padding:22px}.continue-card h2{font-size:19px}.home-lead{font-size:14px}.view-title{font-size:27px}.settings-card{padding:21px}.app-main .question-head h2{font-size:26px}.app-main .review{padding:20px 14px}.app-main .review article{padding:18px 14px}.app-main .question{scroll-margin-top:210px}html{scroll-padding-top:210px}} @media(max-width:380px){.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.reader-buttons button{font-size:11px}.app-main{padding-inline:12px}} @media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}} @media print{.topbar,.catalog-panel,.bottom-nav,.reader-toolbar,.reader-pagination,.app-message{display:none!important}.app-grid{display:block}.app-main{max-width:none;padding:0}.app-main .question{break-before:auto}.home-view{display:none}}

@media(max-width:899px){.catalog-panel{visibility:hidden}.catalog-open .catalog-panel{visibility:visible}}