:root{color-scheme:light;--bg:#e9eeeb;--surface:#f5f6ef;--ink:#173d3a;--muted:#536a65;--line:#a6b9af;--accent:#b43e2b;--soft:#dee9df;--yellow:#efe89a;--active:#176c60;--grid:rgba(34,80,67,.05)}
html[data-theme=dark]{color-scheme:dark;--bg:#0b1919;--surface:#102524;--ink:#e5efdd;--muted:#a2b6ad;--line:#3c5a51;--accent:#ff9a78;--soft:#193a33;--yellow:#37442b;--active:#9bdec2;--grid:rgba(146,204,177,.04)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--bg);color:var(--ink);font-family:"Yu Gothic UI","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;line-height:1.9;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px}button,input,textarea{font:inherit}a{color:inherit;text-underline-offset:5px}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.shell{width:min(1080px,calc(100% - 64px));margin:auto}.mono{font-family:Consolas,"SFMono-Regular",monospace;font-size:11px;letter-spacing:.075em}.top{position:sticky;top:0;z-index:3;background:var(--bg);border-bottom:1px solid var(--line)}.top-inner{min-height:72px;display:flex;justify-content:space-between;align-items:center;gap:12px}.wordmark{font:700 15px/1.2 Consolas,monospace;letter-spacing:-.04em;text-decoration:none}.wordmark span{color:var(--accent)}.theme{border:1px solid var(--line);border-radius:30px;padding:10px 16px;min-height:44px;background:var(--surface);color:var(--ink);cursor:pointer;display:flex;gap:10px;align-items:center;font-size:12px}.disc{width:14px;height:14px;border:1px solid currentColor;border-radius:50%;background:linear-gradient(90deg,currentColor 50%,transparent 50%)}.eyebrow{color:var(--accent)}.hero{padding:58px 0 38px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:30px;align-items:center;margin:25px 0}.hero h1{font-size:clamp(38px,5.5vw,66px);font-weight:500;letter-spacing:-.065em;line-height:1.35;margin:0}.hero h1 em{font-style:normal;color:var(--active)}.lettermark{font:700 clamp(70px,14vw,158px)/1.2 Consolas,monospace;letter-spacing:-.1em;text-align:right}.lettermark span{color:var(--accent)}.hero p{max-width:43em;font-size:14px;color:var(--muted);margin:25px 0 0}.byline{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:18px;font-size:12px}.byline span{color:var(--muted)}.reader-nav{display:flex;gap:24px;padding:18px 0 30px;font-size:12px}.reader-nav a{display:inline-flex;align-items:center;min-height:44px}.part{display:grid;grid-template-columns:230px minmax(0,1fr);gap:50px;border-top:1px solid var(--line);padding:44px 0 55px}.part-note .part-no{font:44px/1 Consolas,monospace;letter-spacing:-.09em;color:var(--accent);margin-bottom:24px}.part-note h2{font-size:20px;line-height:1.7;font-weight:500;margin:0 0 10px}.part-note p{font-size:12px;color:var(--muted);margin:0}.tag{display:inline-block;margin-top:22px;padding:4px 10px;border:1px solid var(--line);font-size:10px;border-radius:20px}.pm-prose{max-width:700px;font-size:15px;line-height:2.15}.pm-prose h2{font-size:25px;line-height:1.6;font-weight:500;letter-spacing:-.025em;margin:48px 0 22px}.pm-prose h2:first-child{margin-top:0}.pm-prose p{margin:0 0 22px}.pm-end{margin-top:36px;padding:24px;background:var(--soft);font-size:13px;line-height:2}.pm-end p{margin:0}.pm-end .sign{display:block;margin-top:15px;color:var(--muted)}.rem-part{background:var(--surface);border:1px solid var(--line);padding:36px;margin-bottom:48px}.rem-top{display:flex;justify-content:space-between;gap:20px;align-items:start}.rem-top .mono{color:var(--accent)}.rem-top h2{font-size:clamp(28px,4vw,40px);font-weight:500;letter-spacing:-.055em;line-height:1.5;margin:16px 0}.pencil{font:80px/.9 Consolas,monospace;color:var(--accent)}.rem-intro{font-size:14px;color:var(--muted);max-width:48em;margin:0 0 25px}.rem-reading{padding:24px 28px;border-left:3px solid var(--accent);background:var(--yellow);font-size:16px;line-height:2;min-height:135px;white-space:pre-wrap;overflow-wrap:anywhere}.rem-reading:empty:before{content:"まだ、REM本人の言葉は入っていません。\Aこの余白は、本人のために。";white-space:pre-line;color:var(--muted);font-size:14px}.editor{margin-top:30px}.editor summary{cursor:pointer;font-size:14px;padding:12px 0;min-height:44px}.editor label{display:block;margin:15px 0 8px;font-size:13px}.editor textarea{width:100%;min-height:260px;resize:vertical;display:block;border:1px solid var(--line);border-radius:0;background:var(--bg);color:var(--ink);padding:22px;font-size:15px;line-height:2;overflow-wrap:anywhere}.editor textarea::placeholder{color:var(--muted)}.tools{display:flex;flex-wrap:wrap;gap:10px;margin:15px 0}.tools button{min-height:44px;padding:9px 16px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;font-size:12px}.tools button.primary{background:var(--ink);color:var(--surface);border-color:var(--ink)}.tools button:disabled{opacity:.5;cursor:default}.tools button:hover:not(:disabled){border-color:var(--accent)}.help,.status{font-size:12px;color:var(--muted);line-height:1.85}.status{color:var(--active);min-height:24px}.path{font-family:Consolas,monospace;font-size:11px;overflow-wrap:anywhere}.save-location{padding:15px;background:var(--soft);margin-top:18px}.save-location p{margin:0}.end-note{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:25px 30px;background:var(--yellow);margin-bottom:45px;font-size:14px}.end-note span{font-size:10px;color:var(--muted)}footer{padding:20px 0 32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;color:var(--muted);font-size:11px}.skip{position:fixed;top:-100px;left:15px;z-index:10;background:var(--surface);padding:10px}.skip:focus{top:10px}
@media(max-width:760px){.shell{width:calc(100% - 36px)}.hero{padding-top:35px}.hero-grid{grid-template-columns:1fr}.hero h1{font-size:46px}.lettermark{text-align:left;font-size:92px;line-height:.9;margin-top:10px}.hero p{font-size:13px}.part{grid-template-columns:1fr;gap:30px;padding-top:30px}.part-note{display:grid;grid-template-columns:65px 1fr;gap:5px 15px}.part-note .part-no{grid-row:span 3;margin:6px 0 0}.part-note h2{margin:0}.part-note p{grid-column:2}.part-note .tag{grid-column:2;justify-self:start;margin-top:8px}.pm-prose{font-size:15px}.pm-prose h2{font-size:24px}.rem-part{padding:24px 20px}.rem-reading{padding:20px;font-size:15px}.rem-top h2{font-size:30px}.pencil{font-size:60px}.end-note{align-items:start;flex-direction:column;gap:8px}.top-inner{min-height:64px}}
@media(max-width:430px){.wordmark{font-size:12px}.theme{padding:9px 12px;gap:7px;font-size:11px}.hero h1{font-size:40px}.byline{font-size:10px;gap:10px}.reader-nav{gap:16px;font-size:11px}.rem-top h2{font-size:27px}.rem-part{padding:22px 16px}.editor textarea{padding:16px}.tools{display:grid;grid-template-columns:1fr 1fr}.tools button.primary{grid-column:1/-1}.pm-end{padding:20px}footer{font-size:9px}.rem-reading{padding:18px}.help,.status{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* ABOUT manuscript v1: REM, AM, PM. Keep the existing responsive layout. */
:root{--accent:#645089;--active:#645089;--soft:#e3dcf3;--yellow:#eee9f4}
html[data-theme=dark]{--accent:#c8b5eb;--active:#c8b5eb;--soft:#29233b;--yellow:#29233b}
.reader-nav{flex-wrap:wrap;border-top:1px solid var(--line);gap:16px 32px}
.reader-nav a{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:4px;font-size:11px;overflow-wrap:anywhere}
.reader-nav a span{font-size:14px}
.part-note .author-label{margin-bottom:10px;color:var(--accent);font-size:11px;letter-spacing:.035em}
.author-prose{min-width:0;overflow-wrap:anywhere;font-size:15px;line-height:2.15}
.author-prose p{margin:0 0 22px}
.author-prose h3{font-size:25px;line-height:1.6;font-weight:500;letter-spacing:-.025em;margin:48px 0 22px}
.author-prose h3:first-child{margin-top:0}
.author-prose p:last-child{margin-bottom:0}
#rem{border-top:3px solid var(--accent)}
.page-note{padding:28px 32px;margin-bottom:45px;background:var(--soft);border-left:3px solid var(--accent)}
.page-note h2{font-size:22px;font-weight:500;margin:0 0 20px}
footer{flex-wrap:wrap}
@media(max-width:760px){.part-note .author-label{grid-column:2;grid-row:1;margin:0}.author-part .part-note h2{grid-column:2;grid-row:2}.author-prose h3{font-size:24px}.page-note{padding:24px 20px}}