@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700;800&family=DM+Sans:wght@400;500;600;700&display=swap');
:root{--navy:#101c2b;--muted:#566475;--orange:#ee662f;--paper:#f2f5f8;--line:#dce3eb;--blue:#2061be}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--paper);color:var(--navy);font-family:'DM Sans',Arial,sans-serif;font-size:16px;line-height:1.6}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #176dff;outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1;letter-spacing:-.02em}h1,h2{font-family:'Barlow Condensed','Arial Narrow',Arial,sans-serif;text-transform:uppercase;font-weight:700}h1{font-size:clamp(3.5rem,8vw,6rem);margin-bottom:20px}h2{font-size:clamp(2.5rem,5vw,3.7rem)}h3{font-size:1.2rem;line-height:1.3}button{color:inherit}small,.small{font-size:.875rem}.top{height:86px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1180px)/2));background:white}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:800;line-height:1.2;letter-spacing:.06em;font-size:14px}.brand span span{display:block;font-size:12px;color:var(--muted);margin-top:4px}.brand-icon{display:grid;place-items:center;background:var(--navy);color:white;width:42px;height:42px;border-radius:50%;font-size:27px;transform:rotate(-15deg)}.manual-link{font-size:.875rem;font-weight:600;text-decoration:none}main{max-width:1180px;margin:auto;padding:34px 24px 120px}.eyebrow{font-size:.8rem;letter-spacing:.14em;font-weight:700;text-transform:uppercase;margin-bottom:12px;display:block;color:var(--muted)}.intro{display:grid;grid-template-columns:1fr .85fr;gap:55px;align-items:center;margin-bottom:30px}.intro h1 em{font-style:normal;color:var(--orange)}.intro p{max-width:490px;color:var(--muted);margin-bottom:18px}.count-strip{display:flex;gap:24px}.count-strip strong{font-family:'Barlow Condensed',Arial,sans-serif;font-size:2rem;line-height:1}.count-strip span{font-size:.8rem;color:var(--muted);display:block}.notice{font-size:.875rem;background:#e7edf4;color:#415267;border-left:3px solid #71869e;padding:12px 16px;line-height:1.5;margin:20px 0 26px}.notice.warn{background:#fff0de;border-color:#c37619;color:#784919}.section-top{display:flex;justify-content:space-between;gap:20px;align-items:baseline}.section-top h2{font-size:2.6rem;margin:0}.groups{display:flex;gap:8px;overflow-x:auto;padding:17px 0 20px;scrollbar-width:thin}.chip{white-space:nowrap;border:1px solid var(--line);background:white;border-radius:8px;padding:10px 16px;font-size:.875rem}.chip.active{color:white;background:var(--navy);border-color:var(--navy)}.search{width:100%;padding:14px 18px;border-radius:9px;border:1px solid var(--line);background:white;margin:12px 0 0}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card{position:relative;text-decoration:none;background:white;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line);border-radius:12px;transition:transform .2s,border-color .2s}.card:hover{transform:translateY(-4px);border-color:#92a4ba}.card-art{height:145px;display:flex;align-items:center;justify-content:center;padding:18px;background:#e9eff5;overflow:hidden}.card-art img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}.card-art.type{background:var(--navy);color:#627d9d;align-items:center;justify-content:space-between;padding:16px 22px;background-image:linear-gradient(#ffffff07 1px,transparent 1px),linear-gradient(90deg,#ffffff07 1px,transparent 1px);background-size:24px 24px}.card-art .numeral{font-family:'Barlow Condensed',Arial,sans-serif;font-size:5rem;font-weight:700;line-height:1}.card-art .symbol{color:#a7b9cf;font-size:2.5rem}.card-body{padding:18px 20px;flex:1;display:flex;flex-direction:column}.card .meta{font-size:12px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;display:flex;justify-content:space-between}.card h3{font-family:'Barlow Condensed',Arial,sans-serif;font-weight:600;font-size:1.8rem;margin:9px 0 18px}.card-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font-size:.8rem;color:var(--muted)}.arrow{border-radius:50%;width:28px;height:28px;background:#edf1f5;display:grid;place-items:center;color:var(--navy)}.bottom{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;gap:80px;background:#101c2bf5;color:#a6b8cb;padding:12px 15px calc(12px + env(safe-area-inset-bottom));z-index:20;backdrop-filter:blur(16px)}.bottom a{text-decoration:none;display:flex;align-items:center;gap:8px;font-size:22px}.bottom span{font-size:.875rem}.bottom a.active{color:#ff8b54}.back{text-decoration:none;font-size:.875rem;color:var(--muted);display:inline-block;margin-bottom:26px}.detail-head{max-width:900px}.detail-head h1{font-size:clamp(3.3rem,7vw,5rem);overflow-wrap:anywhere}.detail-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:start}.panel{background:white;border:1px solid var(--line);border-radius:12px;padding:25px;margin-bottom:22px}.panel h2{font-size:2.7rem;margin-bottom:10px}.progress-head{display:flex;justify-content:space-between;gap:16px;align-items:center}.progress-head span{font-weight:700;color:var(--blue)}progress{width:100%;height:5px;display:block;appearance:none;margin:14px 0 20px}progress::-webkit-progress-bar{background:#e5ebf2;border-radius:10px}progress::-webkit-progress-value{background:var(--orange);border-radius:10px}.check-row{padding:16px 0;display:flex;align-items:flex-start;gap:13px;border-top:1px solid #edf0f4;cursor:pointer}.check-row input{width:23px;height:23px;flex:0 0 23px;margin:2px 0 0;accent-color:var(--blue)}.check-row:has(input:checked) span{color:#647386;text-decoration:line-through}.check-row .step{font-size:.75rem;letter-spacing:.12em;color:var(--muted);display:block;margin-bottom:3px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);padding:11px 17px;background:white;border-radius:7px;font-size:.875rem;font-weight:600;text-decoration:none;min-height:44px}.btn.primary{background:var(--navy);color:white;border-color:var(--navy)}.btn.orange{background:var(--orange);border-color:var(--orange);color:white}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:15px}.figure{margin:0 0 22px;background:white;border:1px solid var(--line);padding:16px;border-radius:10px}.figure img{width:100%;max-height:390px;object-fit:contain;display:block;cursor:zoom-in}.figure figcaption{font-size:.8rem;color:var(--muted);margin-top:12px}.figure a{display:block}.original{margin-top:18px}.original summary{cursor:pointer;font-weight:600;padding:15px 0;font-size:1rem}.original p{line-height:1.8;white-space:normal}.source-text{padding-top:10px}.source-text p{overflow-wrap:anywhere}.source-text p.error{padding:16px;border-left:3px solid var(--orange);background:#fff4ed}.source-text p.tolerance{padding:16px;background:#eaf2ff}.source-text p.figure-caption{font-size:.875rem;color:var(--muted)}.memory{background:var(--navy);color:white;border-radius:10px;padding:25px;margin-top:20px}.memory .eyebrow{color:#a9bed3}.memory p{font-size:1.1rem}.memory h3{font-size:1.2rem}.answer{padding:17px 0 0;color:#c9d8e9}.hidden{display:none!important}.animation{background:#122439;border-radius:14px;color:white;overflow:hidden;border:1px solid #304158;margin-bottom:22px}.anim-heading{padding:20px 22px 0;display:flex;justify-content:space-between;align-items:center;gap:15px}.anim-heading .eyebrow{color:#a4b9cf;margin:0}.anim-heading strong{font-family:'Barlow Condensed',Arial,sans-serif;font-size:1.7rem;font-weight:600}.animation svg{display:block;width:100%;height:auto;aspect-ratio:1.65}.anim-caption{font-size:.875rem;color:#c0d1e3;margin:0;padding:0 22px 15px}.anim-controls{display:flex;gap:8px;align-items:center;padding:0 22px 20px;flex-wrap:wrap}.anim-controls .btn{color:#d7e5f5;border-color:#42566d;background:#20344b}.anim-controls .btn.active{background:#e96a38;color:white;border-color:#e96a38}.anim-controls input{width:100%;accent-color:#fb8450}.anim-tag{font-size:.75rem;color:#8ea5be;padding:10px 22px;background:#0b1a2c}.big-list{display:grid;grid-template-columns:1fr 1fr;gap:18px}.big-list a{padding:22px;background:white;border:1px solid var(--line);border-radius:10px;text-decoration:none}.big-list h3{margin-bottom:8px}.big-list p{font-size:.875rem;color:var(--muted);margin-bottom:0}.empty{padding:30px;background:white;border-radius:10px}.flash-answer{font-size:1rem!important}.visual-stage{max-width:780px;margin:auto}.visual-stage h1{font-size:4rem}.topic-select{width:100%;padding:12px;border:1px solid var(--line);border-radius:8px;margin-bottom:20px;background:white}.after{display:flex;justify-content:space-between;gap:15px;margin-top:30px}.after a{max-width:48%}.copyright{font-size:.8rem;color:var(--muted);margin:30px 0 0}.reveal-in{animation:enter .35s ease both}@keyframes enter{from{opacity:.3;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:800px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.intro{gap:25px}.detail-layout{grid-template-columns:1fr}.detail-visual{grid-row:1}.detail-visual .figure:not(:first-of-type){display:block}.big-list{grid-template-columns:1fr}}@media(max-width:560px){.top{height:73px;padding:0 20px}.brand{font-size:12px}.manual-link{font-size:12px}.brand-icon{width:36px;height:36px;font-size:24px}main{padding:26px 18px 110px}.intro{grid-template-columns:1fr;gap:22px;margin-bottom:14px}.intro h1{font-size:4.15rem;margin-bottom:15px}.intro p{font-size:.95rem;margin-bottom:15px}.intro .animation{margin-bottom:0}.count-strip{gap:26px}.count-strip strong{font-size:1.8rem}.intro .anim-heading{padding-top:15px}.intro .animation svg{aspect-ratio:2}.intro .anim-caption{font-size:.8rem}.cards{gap:12px}.card-art{height:112px;padding:10px}.card-body{padding:13px}.card h3{font-size:1.55rem;margin:8px 0 16px}.card .meta{font-size:12px}.card .meta span:last-child{display:none}.card-foot{font-size:12px}.card-art .numeral{font-size:4rem}.card-art.type{padding:15px}.card-art .symbol{font-size:1.8rem}.bottom{gap:0;justify-content:space-around;padding-top:8px;padding-bottom:calc(8px + env(safe-area-inset-bottom))}.bottom a{flex-direction:column;gap:0;font-size:22px}.bottom span{font-size:12px}.section-top h2{font-size:2.5rem}.section-top small{font-size:12px}.panel{padding:20px}.panel h2{font-size:2.4rem}.detail-head h1{font-size:3.55rem}.detail-head .eyebrow{font-size:12px}.back{margin-bottom:20px}.detail-layout{gap:0}.figure img{max-height:290px}.notice{margin-top:15px}.big-list{gap:12px}.visual-stage h1{font-size:3.6rem}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal-in{animation:none}*{transition:none!important}}
:root{--orange:#f05b20;--blue:#145bf0}.hero-media{position:relative;border-radius:14px;overflow:hidden;background:#102d4b;box-shadow:0 16px 40px #17334c18}.hero-media>img{display:block;width:100%;aspect-ratio:1.4;object-fit:cover}.photo-caption{font-size:12px;padding:7px 14px;color:#c3d4e8;background:#102d4b}.hero-action{display:block;padding:20px 22px;text-decoration:none;background:#185aef;color:white}.hero-action>span{font-size:12px;letter-spacing:.12em;display:block}.hero-action strong{font-family:'Barlow Condensed',Arial,sans-serif;font-size:2rem;font-weight:600;display:flex;justify-content:space-between;align-items:center}.hero-action b{font-family:Arial,sans-serif;font-weight:400}.card:nth-child(4n+1) .card-art.type{background-color:#155be5;color:#91b7ff}.card:nth-child(4n+3) .card-art.type{background-color:#ef622c;color:#ffd3b7}.chip.active{background:#155be5;border-color:#155be5}.card-art{background:#e4edfa}.card-art.type .symbol{color:white}.mobile-break{display:none}@media(max-width:560px){.hero-media>img{aspect-ratio:1.8}.hero-action{padding:13px 18px}.hero-action strong{font-size:1.7rem}.intro h1{font-size:3.8rem}.intro{gap:22px}.count-strip strong{font-size:1.7rem}.photo-caption{font-size:12px}}
.number-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}.number-grid>div{background:#155be5;color:white;padding:17px;border-radius:8px}.number-grid>div:nth-child(even){background:#ec622a}.number-grid span{font-size:.8rem;display:block}.number-grid strong{font-family:'Barlow Condensed',Arial,sans-serif;font-size:2.3rem;line-height:1.4;display:block}.number-grid small{display:block;font-size:.8rem}.number-note{color:var(--muted);margin:15px 0 0}.number-table{overflow-x:auto;margin-bottom:16px}.number-table table{width:100%;border-collapse:collapse;text-align:left;font-size:1rem}.number-table caption{text-align:left;margin-bottom:12px;font-weight:700}.number-table th{background:#155be5;color:white;font-size:.875rem}.number-table th,.number-table td{padding:12px;border-bottom:1px solid #dde5ef}.number-table tr:nth-child(even){background:#eef3fb}
.nav-return{position:sticky;top:8px;z-index:12;display:block;width:100%;min-height:60px;background:#f16a25;color:#101c2b;border:2px solid #ff944a;border-radius:10px;margin:0 0 26px;padding:14px 22px;text-align:left;font-size:1.2rem;font-weight:800;box-shadow:0 5px 20px #09203828}.scene-wrap{width:100%;overflow:hidden;min-height:340px}.scene-wrap canvas{display:block;width:100%;max-width:100%;touch-action:pan-y}.scene-status{background:#155def;color:white;font-weight:700;font-size:1rem;padding:13px 20px;margin-bottom:16px;min-height:51px}.range-label{display:block;width:100%;font-size:.875rem;color:#d2e2f4;padding-top:9px}.anim-controls .range-label input{display:block;width:100%;min-height:32px;margin:4px 0}.camera-options{width:100%;font-size:.875rem}.camera-options summary{padding:10px 0;cursor:pointer}.phase-progress{font-size:1rem;color:#ffd0b6;flex-shrink:0}.anim-heading{align-items:start}.anim-heading strong{line-height:1.2;display:block;margin-top:6px}.animation{border:1px solid #125eee}.animation .anim-tag{line-height:1.5}.animation .anim-controls .btn{min-height:46px}.detail-layout .animation .anim-heading strong{font-size:1.6rem}
.nav-icon{display:grid;place-items:center;width:28px;height:28px;border:1px solid currentColor;border-radius:9px;font-size:15px;font-weight:800}.animation{position:relative;display:flex;flex-direction:column;max-height:min(760px,calc(100dvh - 110px))}.animation .anim-heading{order:0;min-height:76px;background:#0b1a2c;padding:16px 20px 12px}.animation .scene-wrap{order:1;min-height:300px;flex:1}.animation .scene-status{order:2;margin:0;background:#155def;border-top:1px solid #4d8bff}.animation .anim-controls{order:3;padding:14px 20px}.animation .anim-caption{order:4;padding:0 20px 14px}.animation .anim-tag{order:5}.detail-visual{position:sticky;top:12px}.card-art.type{background-image:radial-gradient(circle at 75% 30%,#ffffff20 0 2px,transparent 3px),linear-gradient(#ffffff0a 1px,transparent 1px),linear-gradient(90deg,#ffffff0a 1px,transparent 1px)}
@media(max-width:800px){.detail-visual{position:static}.detail-head{margin-bottom:12px}.numbers{margin-bottom:16px}.animation{max-height:none}.animation .scene-wrap{min-height:300px}.nav-return{min-height:52px;margin-bottom:16px;padding:10px 16px}.detail-layout>.detail-visual{grid-row:1}.detail-layout>div:first-child{grid-row:2}}
@media(max-width:560px){.animation .anim-heading{min-height:66px;padding:12px 15px 9px}.animation .anim-heading strong{font-size:1.35rem}.animation .scene-wrap{min-height:270px}.scene-status{font-size:.9rem;min-height:46px;padding:10px 15px}.animation .anim-controls{padding:10px 14px;gap:6px}.animation .anim-controls .btn{min-height:42px;padding:8px 10px}.animation .anim-caption{padding:0 14px 10px;font-size:.8rem}.animation .anim-tag{padding:8px 14px}.camera-options,.range-label{font-size:.8rem}.bottom{border-top:1px solid #2f4660}.nav-icon{width:25px;height:25px;border-radius:8px}.detail-head h1{font-size:3rem;margin-bottom:12px}}
.procedure-panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px;margin:24px 0}.procedure-panel h2{font-size:clamp(2.3rem,5vw,3.4rem);margin:0 0 10px}.procedure-intro{color:var(--muted);margin-bottom:18px}.procedure-list{list-style:none;counter-reset:procedure;margin:0;padding:0}.procedure-list li{counter-increment:procedure;display:grid;grid-template-columns:46px 1fr;gap:14px;align-items:start;padding:16px 0;border-top:1px solid #e5ebf2}.procedure-list li:before{content:counter(procedure);display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:#155be5;color:#fff;font-family:'Barlow Condensed',Arial,sans-serif;font-size:1.45rem;font-weight:800}.procedure-list li:nth-child(even):before{background:var(--orange)}.procedure-list li span{padding-top:7px}.common-errors{margin:0 0 30px}.common-errors-trigger{width:100%;min-height:62px;border:0;border-radius:10px;background:#c91824;color:#fff;font-family:'Barlow Condensed',Arial,sans-serif;font-size:1.75rem;font-weight:800;text-transform:uppercase;letter-spacing:.04em;box-shadow:0 0 0 0 #c9182470;animation:errorPulse 1.25s ease-in-out infinite}.common-errors-trigger span{margin-right:8px}.common-errors-panel{background:#fff;border:2px solid #c91824;border-top:0;border-radius:0 0 10px 10px;padding:20px 24px}.common-errors-panel p{font-weight:700;margin-bottom:8px}.common-errors-panel ul{margin:0;padding-left:22px}.common-errors-panel li{padding:5px 0}.common-errors-trigger[aria-expanded="true"]{border-radius:10px 10px 0 0}@keyframes errorPulse{0%,100%{background:#b9141f;box-shadow:0 0 0 0 #c9182460}50%{background:#f02734;box-shadow:0 0 0 9px #c9182400}}@media(max-width:560px){.procedure-panel{padding:20px}.procedure-list li{grid-template-columns:40px 1fr;gap:11px}.procedure-list li:before{width:38px;height:38px;font-size:1.25rem}.procedure-list li span{padding-top:5px}.common-errors-trigger{font-size:1.5rem}.common-errors-panel{padding:18px}}@media(prefers-reduced-motion:reduce){.common-errors-trigger{animation:none}}
.visual-stage{max-width:960px}.visual-stage>h1{font-size:clamp(3.3rem,8vw,5.8rem);margin-bottom:10px}.manual-figure-card{display:grid;grid-template-columns:.75fr 1.25fr;background:linear-gradient(135deg,#0d2e52,#155be5);color:#fff;border-radius:16px;overflow:hidden;margin:24px 0;box-shadow:0 20px 45px #0d2e5230}.manual-figure-copy{padding:26px}.manual-figure-copy .eyebrow{color:#b9d3ff}.manual-figure-copy h2{font-size:2.5rem;margin-bottom:10px}.manual-figure-copy p{color:#dce8fb;margin:0}.manual-figure-card a{display:grid;place-items:center;background:#fff;padding:16px;min-height:250px}.manual-figure-card img{display:block;width:100%;height:100%;max-height:390px;object-fit:contain}.manual-detail{background:#eef5ff;border:1px solid #bdd2f3;border-radius:14px;padding:26px;margin:24px 0}.manual-detail h2{font-size:clamp(2.2rem,5vw,3.2rem);margin-bottom:14px}.manual-detail p{background:#fff;border-left:4px solid #155be5;border-radius:0 8px 8px 0;padding:14px 16px;line-height:1.75;margin-bottom:12px}.manual-detail .btn{margin-top:5px}.visual-stage .animation{box-shadow:0 22px 55px #071a3150;border-color:#3e78bb}.visual-stage .scene-wrap{min-height:460px}.visual-stage .scene-status{background:linear-gradient(90deg,#074fbf,#1679ef)}@media(max-width:700px){.manual-figure-card{grid-template-columns:1fr}.manual-figure-card a{min-height:210px}.manual-figure-copy{padding:21px}.visual-stage .scene-wrap{min-height:330px}}@media(max-width:560px){.visual-stage>h1{font-size:3.2rem}.manual-detail{padding:20px}.manual-detail p{padding:12px 14px}.visual-stage .scene-wrap{min-height:300px}}