:root{--ink:#21242b;--muted:#5b5e66;--rose:#a7487e;--rose-dark:#85375f;--paper:#fff;--pink:#fdf1f5;--line:#e7e4e6;--pink-line:#ecd5df;--copy-line:#d9c8d2}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;font-size:18px;line-height:1.85;-webkit-font-smoothing:antialiased}a{color:var(--rose);text-underline-offset:3px}a:hover{color:var(--rose-dark)}button,a{touch-action:manipulation}button{font:inherit}a:focus-visible,button:focus-visible,video:focus-visible{outline:3px solid var(--rose);outline-offset:4px}
.umi-guide-top{min-height:63px;padding:16px 28px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:12px;font-weight:700;letter-spacing:.07em;background:#fff}.umi-guide-top span{color:var(--rose)}.umi-guide-top a{color:var(--ink);font-size:13px;letter-spacing:0;text-decoration:none}.wrap{max-width:780px;margin:0 auto;padding:0 30px 52px}.hero{text-align:center;padding:48px 0 30px}.eyebrow{color:var(--rose);font-size:14px;line-height:1.6;font-weight:700;margin:0 0 10px}.hero h1{font-size:48px;line-height:1.3;letter-spacing:-.025em;margin:12px 0 18px}.hero h1 span{color:var(--rose);font-size:1.16em;letter-spacing:-.035em}.hero h1 small{display:block;color:var(--rose);font-size:19px;line-height:1.6;letter-spacing:.01em;margin-top:5px}.hero-definition{font-size:25px;line-height:1.5;letter-spacing:-.015em;font-weight:750;margin:0 0 15px}.small-break{display:none}.hero-intro{max-width:580px;margin:0 auto 24px;font-size:18px}.date-note{font-size:12px;color:var(--muted);margin:16px 0 0;line-height:1.6}.guide-section{padding:35px 0;border-top:1px solid var(--line)}h2{font-size:30px;line-height:1.5;letter-spacing:-.025em;margin:0 0 16px}h3{font-size:21px;line-height:1.55;letter-spacing:-.01em;margin:0 0 5px}p{margin:0 0 16px}.number{font-size:15px;font-weight:750;color:var(--rose);letter-spacing:.06em}.change-list{display:grid;gap:22px;margin-top:25px}.change-list article{display:grid;grid-template-columns:33px 1fr;gap:13px}.change-list .number{padding-top:4px}.change-list p{margin:0;font-size:17px;line-height:1.85}.source-line{font-size:12px;line-height:1.6;margin:12px 0 0}.application-note,.reactions-note{color:var(--muted);font-size:15px;margin:0 0 23px;line-height:1.8}.example{padding:22px 0 25px}.example+.example{border-top:1px solid var(--line)}.feature-heading{display:flex;align-items:baseline;gap:12px;margin:0 0 17px}.feature-heading h3{font-size:24px;margin:0}.demo{margin:0 auto 22px;text-align:center}.demo video,.demo img{display:block;width:100%;height:auto;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:12px}.demo figcaption{font-size:12px;line-height:1.65;color:var(--muted);margin:9px 0 0}.demo figcaption a{margin-left:5px;white-space:nowrap}.hero-demo{max-width:270px;margin-bottom:0}.bill-demo{max-width:354px}.map-demo{max-width:354px}.prompt{background:var(--pink);border:1px solid var(--pink-line);border-radius:10px;overflow:hidden}.prompt-head{display:flex;justify-content:flex-end;padding:12px 17px 0}.prompt button{color:var(--rose);background:#fff;border:1px solid var(--copy-line);border-radius:6px;font-size:13px;font-weight:700;line-height:1.5;padding:10px 14px;min-height:42px;cursor:pointer}.prompt button:hover{background:#fffafd;color:var(--rose-dark);border-color:var(--rose)}.prompt pre{font-family:inherit;font-size:17px;line-height:1.85;white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:13px 22px 22px;color:var(--ink)}.copy-status{font-size:13px;line-height:1.7;margin:0;padding:0 22px 14px;color:var(--rose-dark)}.copy-status:empty{display:none}.copy-fallback{width:calc(100% - 44px);margin:0 22px 18px;height:180px;font:inherit;font-size:16px;line-height:1.7;border:1px solid var(--pink-line);background:#fff;color:var(--ink)}.feedback{background:var(--pink);border:1px solid var(--pink-line);border-radius:10px;padding:20px 22px;margin:0 0 13px}.feedback p:last-child{margin:0;font-size:17px;line-height:1.85}.feedback .eyebrow{margin-bottom:7px}.source-link{font-size:12px;white-space:nowrap}.use-notes{padding-left:21px;margin:0;font-size:16px;line-height:1.85}.use-notes li{padding-left:2px;margin:0 0 13px}.use-notes li::marker{color:var(--rose)}.umi-shared-footer{background:#fff;border-top:1px solid var(--line);display:flex;flex-direction:column;align-items:center;gap:17px;padding:30px 18px 35px;text-align:center}.umi-shared-footer img{width:72px;height:72px;object-fit:contain}.umi-shared-footer span{color:var(--rose);font-weight:700;font-size:12px;letter-spacing:.1em}.umi-shared-footer a{color:var(--rose);background:#fff;border:1px solid var(--copy-line);border-radius:6px;text-decoration:none;padding:13px 19px;font-size:14px;font-weight:700;line-height:1.6}
@media(min-width:900px){.hero{padding-top:58px}.change-list{grid-template-columns:1fr 1fr 1fr;gap:25px}.change-list article{display:block}.change-list .number{display:block;padding:0;margin:0 0 8px}.change-list h3{font-size:20px}.hero-demo{max-width:255px}}
@media(max-width:600px){.umi-guide-top{padding:14px 18px;min-height:54px;font-size:10px;gap:8px}.umi-guide-top a{font-size:12px}.wrap{padding:0 18px 30px}.hero{padding:31px 0 27px}.hero h1{font-size:35px;margin:11px 0 17px}.hero h1 span{font-size:1.14em}.hero h1 small{font-size:15px;margin-top:5px}.hero-definition{font-size:23px;margin-bottom:13px;line-height:1.55}.small-break{display:block}.hero-intro{font-size:17px;line-height:1.8;margin-bottom:22px}.hero-demo{max-width:245px}.guide-section{padding:29px 0}h2{font-size:27px;margin-bottom:15px}.change-list{gap:22px;margin-top:23px}.change-list h3{font-size:21px}.feature-heading h3{font-size:23px}.example{padding:21px 0 24px}.prompt pre{font-size:16px;padding:13px 18px 20px;line-height:1.85}.prompt-head{padding:12px 14px 0}.copy-status{padding-left:18px;padding-right:18px}.feedback{padding:19px 18px}.feedback p:last-child{font-size:16px}.bill-demo,.map-demo{max-width:354px}.use-notes{font-size:15px;line-height:1.85}}
@media(max-width:350px){.wrap{padding-left:14px;padding-right:14px}.hero h1{font-size:31px}.hero-definition{font-size:22px}.umi-guide-top{padding-left:14px;padding-right:14px;font-size:9px}.umi-guide-top a{font-size:11px}.feature-heading{gap:9px}.feature-heading h3{font-size:21px}h2{font-size:25px}.prompt pre{padding-left:16px;padding-right:16px}.hero-demo{max-width:230px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.video-frame{position:relative}.video-start{position:absolute;left:50%;bottom:15px;transform:translateX(-50%);white-space:nowrap;color:var(--rose);background:#fff;border:1px solid var(--copy-line);border-radius:6px;box-shadow:0 2px 9px #21242b18;font-size:14px;font-weight:700;line-height:1.6;min-height:44px;padding:10px 18px;cursor:pointer}.video-start:hover{color:var(--rose-dark);border-color:var(--rose)}.video-start[hidden]{display:none}