:root{color-scheme:light dark;--bg:#f6f7f9;--panel:#fff;--text:#1a1d23;--muted:#667085;--line:#e3e6ea;--accent:#4f7cff;--ed:#fff}
@media(prefers-color-scheme:dark){:root{--bg:#0f1115;--panel:#171a21;--text:#eef1f6;--muted:#9aa4b2;--line:#272c36;--accent:#7c9bff;--ed:#13161c}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 Inter,system-ui,-apple-system,"Segoe UI",sans-serif}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}
header,footer,main{width:min(1150px,calc(100% - 28px));margin-inline:auto}header{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:16px 0}.brand{font-weight:850;font-size:1.15rem}.dot{color:var(--accent)}nav{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.93rem}
.intro h1{font-size:clamp(1.7rem,4vw,2.5rem);letter-spacing:-.04em;margin:.3em 0 .1em}.intro p{color:var(--muted);margin:0 0 14px}
.app{display:grid;grid-template-columns:250px 1fr;border:1px solid var(--line);border-radius:16px;background:var(--panel);overflow:hidden;height:min(72vh,680px);min-height:420px}
.side{border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}.side-top{padding:12px;display:grid;gap:8px}#list{list-style:none;margin:0;padding:0 8px 8px;overflow:auto;flex:1}
button,select,input{font:inherit}button{cursor:pointer;border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:10px;padding:.55rem .8rem;font-weight:650}button.secondary,.secondary{background:transparent;color:var(--text);border-color:var(--line)}button:hover{filter:brightness(1.08)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}input[type=search],select{width:100%;padding:.5rem .7rem;border:1px solid var(--line);border-radius:10px;background:var(--ed);color:var(--text)}
.note{width:100%;text-align:left;background:transparent;color:var(--text);border:0;border-radius:10px;padding:9px 10px;display:block;font-weight:500}.note:hover,.note.active{background:color-mix(in srgb,var(--accent) 14%,transparent)}.note strong{display:block;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.note small{color:var(--muted)}
.editor-wrap{display:flex;flex-direction:column;min-width:0;min-height:0}.toolbar{display:flex;gap:6px;flex-wrap:wrap;align-items:center;padding:10px;border-bottom:1px solid var(--line)}.toolbar .tb{padding:.4rem .65rem;font-weight:600}.toolbar select{width:auto}.spacer{flex:1}.filebtn{display:inline-block;border:1px solid var(--line);border-radius:10px;cursor:pointer}.danger:hover{color:#e5484d}
#editor{flex:1;overflow:auto;padding:22px 26px;background:var(--ed);outline:0;font-size:1.05rem}#editor:empty::before{content:attr(data-ph);color:var(--muted)}#editor h1{font-size:1.8rem;margin:.4em 0}#editor h2{font-size:1.35rem;margin:.5em 0}
.status{display:flex;justify-content:space-between;padding:8px 14px;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}
.prose{max-width:760px;padding:36px 0}.prose p{color:var(--muted)}footer{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:24px 0 36px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
@media(max-width:760px){.app{grid-template-columns:1fr;height:auto}.side{border-right:0;border-bottom:1px solid var(--line);max-height:190px}#editor{min-height:55vh}}