:root{
  --navy:#0B2545; --navy-2:#13315C; --ink:#1B2433; --muted:#5B6678;
  --line:#CBD5E3; --wash:#EEF2F7; --paper:#fff;
  --flag-bg:#FFE9A8; --flag-ink:#6B4500; --flag-line:#C98A00;
  --danger:#A32020;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--ink:#E6EBF3;--muted:#9AA7BD;--line:#2C3E5C;--wash:#14233D;--paper:#0A1730;--navy:#8DB4F0;--navy-2:#B7D0F7;
  --flag-bg:#4A3800;--flag-ink:#FFE08A;--flag-line:#C98A00;--danger:#FF8F8F}
  .bar{background:#0B2545;color:#fff} .btn{background:#2F5FA8;color:#fff} .btn.ghost{background:transparent;color:#fff;border-color:#8DB4F0}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 var(--font)}
.bar{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:.75rem;flex-wrap:wrap;
  background:var(--navy);color:#fff;padding:.6rem clamp(1rem,4vw,2rem)}
.brand{font-weight:700;letter-spacing:.02em;font-size:1.1rem}
.actions{display:flex;gap:.5rem;flex-wrap:wrap}
.btn{font:600 .9rem/1 var(--font);background:var(--navy);color:#fff;border:1px solid var(--navy);border-radius:0;padding:.7rem 1rem;min-height:44px;cursor:pointer}
.bar .btn{background:#fff;color:#0B2545;border-color:#fff}
.bar .btn.ghost{background:transparent;color:#fff;border-color:#fff}
.btn.ghost{background:transparent;color:var(--navy);border-color:var(--navy)}
.btn:hover{filter:brightness(1.12)}
.btn:disabled{opacity:.55;cursor:wait}
:focus-visible{outline:3px solid #2F7BFF;outline-offset:2px}
.page{max-width:46rem;margin:0 auto;padding:clamp(1.25rem,5vw,3rem) clamp(1rem,4vw,1.5rem) 3rem}
.muted{color:var(--muted)}
.err{color:var(--danger);font-weight:600;margin:.5rem 0}

/* document */
.doc h1{font-size:clamp(1.35rem,4.5vw,1.7rem);line-height:1.25;color:var(--navy);margin:2.5rem 0 1rem;letter-spacing:.01em}
.doc h2{font-size:1.2rem;line-height:1.3;color:var(--navy);margin:2rem 0 .75rem}
.doc h3{font-size:1.05rem;line-height:1.35;margin:1.6rem 0 .5rem}
.doc p{margin:.8rem 0;overflow-wrap:anywhere}
.doc ul{margin:.6rem 0 1rem;padding-left:1.25rem}
.doc li{margin:.3rem 0;overflow-wrap:anywhere}
.doc hr{border:0;border-top:1px solid var(--line);margin:2rem 0}
.sec{padding:0}
.sec.title{border-left:8px solid var(--navy);padding-left:clamp(1rem,3vw,1.5rem);margin-bottom:1rem}
.sec.title h1{font-size:clamp(1.5rem,6vw,2.1rem);margin:0;line-height:1.15}
.sec.title h2{font-size:clamp(1.05rem,4vw,1.3rem);margin:.4rem 0 1.2rem;letter-spacing:.04em}
.sec.title h3{font-size:clamp(1.1rem,4vw,1.35rem);margin:0 0 1.2rem;line-height:1.35}

mark.flag{background:var(--flag-bg);color:var(--flag-ink);padding:.1rem .35rem;border-bottom:2px solid var(--flag-line);border-radius:0}
mark.flag b{display:inline-block;margin-left:.45rem;background:var(--flag-ink);color:var(--flag-bg);font-size:.72rem;line-height:1;padding:.25rem .4rem;font-weight:700;vertical-align:.1em}

.todo{border:2px solid var(--flag-line);background:var(--flag-bg);color:var(--flag-ink);padding:1rem 1.1rem;margin-bottom:2rem}
.todo h2{margin:0 0 .5rem;font-size:1.05rem;color:inherit}
.todo ul{margin:0;padding-left:1.1rem}
.todo a{color:inherit;font-weight:600}

/* comments */
.cm{margin:1.5rem 0 0;border:1px solid var(--line);background:var(--wash)}
.cm>summary{cursor:pointer;padding:.8rem 1rem;font-weight:600;color:var(--navy);min-height:44px;display:flex;align-items:center}
.cm-body{padding:0 1rem 1rem}
.cm-list{list-style:none;margin:0 0 1rem;padding:0}
.cm-list li{background:var(--paper);border:1px solid var(--line);padding:.7rem .9rem;margin:.5rem 0}
.cm-list .who{font-weight:700}
.cm-list time{color:var(--muted);font-size:.85rem;margin-left:.5rem}
.cm-list p{margin:.3rem 0 0;white-space:pre-wrap}
.cm-empty{color:var(--muted);margin:0 0 1rem}
label{display:block;font-weight:600;font-size:.9rem;margin:.7rem 0 .25rem}
input,textarea{width:100%;font:inherit;color:var(--ink);background:var(--paper);border:1px solid var(--muted);border-radius:0;padding:.6rem .7rem;min-height:44px}
textarea{resize:vertical;line-height:1.5}
#ed-text{font:.9rem/1.5 ui-monospace,Menlo,Consolas,monospace}
.row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}
.row.end{display:flex;justify-content:flex-end;gap:.5rem;margin-top:1rem;flex-wrap:wrap}
@media(max-width:560px){.row{grid-template-columns:1fr}}

/* dialogs */
.dlg{border:2px solid var(--navy);border-radius:0;padding:1.25rem;width:min(44rem,calc(100vw - 1.5rem));max-height:calc(100dvh - 1.5rem);color:var(--ink);background:var(--paper)}
.dlg::backdrop{background:rgba(11,37,69,.6)}
.dlg h2{margin:0 0 .5rem;color:var(--navy);font-size:1.2rem}
.hist{list-style:none;margin:1rem 0 0;padding:0}
.hist li{border:1px solid var(--line);padding:.7rem .9rem;margin:.5rem 0}
.hist .top{display:flex;justify-content:space-between;gap:.5rem;flex-wrap:wrap;align-items:center}
.hist .cur{font-weight:700;color:var(--navy)}
.hist pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:16rem;overflow:auto;background:var(--wash);padding:.7rem;font:.82rem/1.5 ui-monospace,Menlo,Consolas,monospace}
.hist .btns{display:flex;gap:.4rem;margin-top:.5rem;flex-wrap:wrap}
.hist .btn{padding:.55rem .8rem;min-height:40px}

.foot{border-top:1px solid var(--line);text-align:center;padding:1.5rem 1rem 2rem;color:var(--muted);font-size:.9rem}
.foot p{margin:.2rem 0}
.credit a{color:var(--muted)}
@media print{.bar,.cm,.credit{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}