:root{--paper:#F8F7F3;--ink:#111;--line:#DADADA;--signal:#E7FF38}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:Helvetica,Arial,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;line-height:1.7}a{color:inherit;text-underline-offset:4px}button{font:inherit;color:inherit;cursor:pointer}a:focus-visible,button:focus-visible,.image-scroll:focus-visible{outline:3px solid #111;outline-offset:4px}.skip-link{position:absolute;top:-60px;left:16px;background:#E7FF38;padding:10px;z-index:20}.skip-link:focus{top:10px}.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:1440px;margin:auto;padding:22px 32px;border-bottom:2px solid #111}.brand{font-weight:900;letter-spacing:-.04em;font-size:22px;line-height:1.05;text-decoration:none}.site-header nav{display:flex;gap:12px}.site-header nav a{border:1px solid #111;padding:10px 16px;text-decoration:none;font-size:13px;font-weight:700;min-height:44px}.site-header nav a:hover{background:#E7FF38}main{max-width:1280px;margin:auto;padding:0 32px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:.07em;margin:0 0 15px;line-height:1.5}h1,h2,p{margin-top:0}h1,h2{font-weight:900;letter-spacing:-.05em;line-height:1.25}h1{font-size:clamp(44px,6vw,82px);margin:26px 0 25px}.cover{padding:58px 0 48px;display:grid;grid-template-columns:minmax(0,1fr) 220px;column-gap:25px}.cover-count{align-self:start;text-align:right;line-height:1}.cover-count b{display:block;font-size:clamp(116px,15vw,190px);font-weight:900;letter-spacing:-.08em}.cover-count span{font-size:13px;letter-spacing:.04em;display:block;margin-top:18px}.app-name{font-size:clamp(19px,2.5vw,29px);font-weight:700;margin-bottom:12px}.lead{font-size:clamp(16px,1.8vw,21px);line-height:1.7;margin-bottom:0}.cover-image{display:block;grid-column:1/-1;border:1px solid #111;margin-top:34px}.cover-image img{display:block;width:100%;height:auto}.cover-tagline{grid-column:1/-1;background:#E7FF38;font-size:clamp(18px,2.8vw,34px);font-weight:800;padding:18px 25px;line-height:1.5;margin:22px 0 18px}.cover-meta{grid-column:1/-1;display:flex;justify-content:space-between;gap:15px;font-size:13px;align-items:center}.cover-meta p{margin:0}.cover-meta a{padding:8px 0;font-weight:700}.contents{padding:36px 0 45px;border-top:2px solid #111;scroll-margin-top:20px}.contents h2{font-size:clamp(26px,3vw,38px);margin-bottom:16px}.contents>p:not(.eyebrow){font-size:15px;margin-bottom:25px}.chapter-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid #111}.chapter-nav a{display:block;padding:20px 17px;text-decoration:none;font-size:17px;font-weight:700}.chapter-nav a+a{border-left:1px solid #111}.chapter-nav a:hover{background:#E7FF38}.chapter-nav span{display:block;font-size:12px;letter-spacing:.06em;margin-bottom:6px}.screen-card{border-top:2px solid #111;padding:44px 0 60px;scroll-margin-top:24px}.screen-card.access{--signal:#72D7FF}.screen-card.compare{--signal:#FF4FC3}.screen-card.use{--signal:#E7FF38}.screen-heading{display:grid;grid-template-columns:135px minmax(0,1fr);gap:25px}.screen-number{font-weight:900;font-size:100px;letter-spacing:-.07em;line-height:1}.screen-heading h2{font-size:clamp(30px,4vw,52px);margin:0 0 20px}.screen-heading .lead{max-width:920px}.audience{background:var(--signal);padding:12px 16px;font-size:15px;margin:25px 0 17px;line-height:1.6}.audience b{margin-right:20px;font-size:12px;letter-spacing:.06em}.focus{font-size:15px;font-weight:700;line-height:1.7;margin:0 0 17px;padding-left:17px;border-left:5px solid #111}.screen-photo{position:relative;display:block;border:1px solid #111;padding:0;background:#fff;width:100%;text-align:left}.screen-photo img{display:block;width:100%;height:auto}.screen-photo>span{position:absolute;bottom:15px;right:15px;background:#111;color:white;font-size:13px;font-weight:700;padding:9px 13px}.howto{padding:25px 0 23px}.howto .eyebrow{margin-bottom:15px}.howto ol{list-style:none;counter-reset:steps;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:0;padding:0}.howto li{counter-increment:steps;position:relative;padding-left:47px;font-size:17px;line-height:1.65;font-weight:700}.howto li:before{content:counter(steps);position:absolute;left:0;top:0;width:31px;height:31px;background:var(--signal);text-align:center;font-size:18px;line-height:31px}.note{font-size:13px;line-height:1.8;color:#555;margin:0 0 22px}.open-feature{display:inline-flex;justify-content:space-between;gap:60px;min-height:48px;background:#111;color:white;border:1px solid #111;padding:12px 20px;text-decoration:none;font-size:15px;font-weight:700}.open-feature:hover{background:var(--signal);color:#111}.closing{border-top:2px solid #111;padding:50px 0}.closing h2{font-size:clamp(34px,4.8vw,62px)}.closing>p:not(.eyebrow):not(.note){font-size:20px}.closing-actions{display:flex;gap:15px;flex-wrap:wrap;margin:30px 0}.closing-actions a{padding:17px 22px;min-height:48px;border:1px solid #111;background:#E7FF38;font-size:17px;font-weight:700;text-decoration:none}footer{border-top:1px solid #111;padding:25px 32px;max-width:1440px;margin:auto;display:flex;gap:20px;flex-wrap:wrap;font-size:12px}footer p{margin:0;flex:1}dialog{width:min(96vw,1600px);max-width:none;max-height:96vh;padding:16px;border:1px solid #111;margin:auto;background:var(--paper);color:#111}dialog::backdrop{background:rgba(0,0,0,.78)}.dialog-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:8px}.dialog-bar p{margin:0;font-weight:700;font-size:16px}.dialog-bar button{min-width:85px;min-height:44px;flex-shrink:0;background:white;border:1px solid #111;font-weight:700}.dialog-hint{font-size:12px;margin:0 0 12px;color:#555}.image-scroll{max-height:72vh;overflow:auto;overscroll-behavior:contain;border:1px solid #111;background:#fff}.image-scroll img{display:block;width:100%;height:auto;min-width:980px}.dialog-bar+img{width:100%}dialog .open-feature{margin-top:14px;font-size:13px}
@media(max-width:800px){main{padding:0 22px}.site-header{padding:18px 22px}.brand{font-size:19px}.site-header nav{gap:7px}.site-header nav a{font-size:12px;padding:9px 11px}.cover{grid-template-columns:minmax(0,1fr) 120px;padding-top:38px;gap:18px}.cover-count b{font-size:118px}.cover-count span{font-size:10px;margin-top:10px}.eyebrow{font-size:10px}.cover-meta{font-size:11px}.chapter-nav{grid-template-columns:repeat(2,minmax(0,1fr))}.chapter-nav a:nth-child(3){border-left:0}.chapter-nav a:nth-child(n+3){border-top:1px solid #111}.chapter-nav a{font-size:15px}.screen-heading{grid-template-columns:83px minmax(0,1fr);gap:15px}.screen-number{font-size:77px}.screen-heading .lead{font-size:16px}.howto ol{gap:12px}.howto li{font-size:15px;padding-left:38px}.howto li:before{width:27px;height:27px;line-height:27px;font-size:15px}.screen-card{padding:33px 0 40px}.closing>p:not(.eyebrow):not(.note){font-size:17px}footer{padding:22px;display:block}footer a{display:inline-block;margin:10px 16px 0 0}dialog{padding:12px}.dialog-bar p{font-size:14px}.image-scroll{max-height:65vh}}
@media(max-width:520px){main{padding:0 16px}.site-header{padding:17px 16px;gap:10px}.brand{font-size:16px}.site-header nav a{padding:8px;font-size:11px}.cover{grid-template-columns:minmax(0,1fr);gap:0}.cover-count{display:flex;align-items:end;gap:13px;text-align:left;margin:23px 0 0}.cover-count b{font-size:80px}.cover-count span{font-size:12px;margin:0 0 9px}h1{font-size:clamp(35px,10vw,51px);margin:22px 0}.cover-image{margin-top:24px}.cover-tagline{font-size:21px;padding:15px 16px}.cover-meta{display:block}.cover-meta a{display:inline-block;margin-top:6px}.contents{padding:28px 0}.contents h2{font-size:27px}.chapter-nav a{padding:15px 10px;font-size:14px}.screen-heading{display:block}.screen-number{display:block;font-size:61px;margin-bottom:14px}.screen-heading h2{font-size:31px}.screen-heading .lead br{display:none}.audience{font-size:13px;padding:11px 12px}.audience b{display:block;margin-bottom:3px}.focus{font-size:14px}.screen-photo>span{font-size:11px;bottom:7px;right:7px;padding:6px 9px}.howto ol{grid-template-columns:1fr;gap:17px}.howto li{font-size:16px;min-height:29px;padding-left:40px}.note{font-size:13px}.open-feature{width:100%;gap:15px}.closing h2{font-size:37px}.closing-actions{display:grid;grid-template-columns:1fr}.closing-actions a{font-size:15px;padding:14px}.dialog-bar{gap:10px}.dialog-bar p{font-size:13px}.dialog-bar button{min-width:77px;font-size:13px}dialog .open-feature{width:100%;justify-content:center}.dialog-hint{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header,.chapter-nav,.open-feature,.screen-photo>span,dialog,.skip-link{display:none}.cover,.screen-card,.closing{break-after:page;break-inside:avoid}.screen-photo img{max-height:55vh;object-fit:contain}.screen-card{border-top:0}.cover-count{display:none}main{padding:0}.cover{display:block}.note{font-size:11px}}
