.hidden { display:none !important; }
* { box-sizing:border-box; margin:0; padding:0; }

:root {
    --bg: #191919;
    --side: #1e1e1e;
    --hov: #2a2a2a;
    --act: #333;
    --txt: #e4e4e4;
    --txt2: #9b9a97;
    --ph: #5a5a5a;
    --brd: #2e2e2e;
    --blue: #3b82f6;
    --red: #ef4444;
    --rad: 6px;
    --font: -apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;
    --mono: 'SF Mono','Fira Code','Cascadia Code',Consolas,monospace;
}

html,body { height:100%; overflow:hidden; }
body { font-family:var(--font); background:var(--bg); color:var(--txt); }

#app { display:flex; height:100vh; }

/* Sidebar */
#sidebar { width:260px; min-width:260px; background:var(--side); border-right:1px solid var(--brd); display:flex; flex-direction:column; transition:margin-left 0.2s ease; }
#sidebar.collapsed { margin-left:-260px; }

#sidebar-header { display:flex; align-items:center; gap:10px; padding:14px 18px; font-size:15px; font-weight:600; border-bottom:1px solid var(--brd); }
#sidebar-header i:first-child { color:var(--blue); font-size:17px; }

#new-doc-btn { margin-left:auto; background:none; border:none; color:var(--txt2); cursor:pointer; width:28px; height:28px; border-radius:var(--rad); display:flex; align-items:center; justify-content:center; font-size:15px; }
#new-doc-btn:hover { background:var(--hov); color:var(--txt); }

#sidebar-search-wrap { padding:8px 12px; }
#sidebar-search { width:100%; background:var(--bg); border:1px solid var(--brd); border-radius:var(--rad); padding:7px 10px; color:var(--txt); font-size:13px; outline:none; font-family:var(--font); }
#sidebar-search::placeholder { color:var(--ph); }
#sidebar-search:focus { border-color:var(--blue); }

#docs-list { flex:1; overflow-y:auto; padding:4px 6px; }

.doc-item { display:flex; align-items:center; gap:8px; padding:7px 10px; border-radius:var(--rad); cursor:pointer; font-size:13px; color:var(--txt2); border:none; background:none; width:100%; text-align:left; font-family:var(--font); }
.doc-item:hover { background:var(--hov); color:var(--txt); }
.doc-item.active { background:var(--act); color:var(--txt); }
.doc-item i { font-size:13px; color:var(--txt2); flex-shrink:0; }
.doc-item-title { flex:1; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.doc-item-date { font-size:11px; color:var(--ph); white-space:nowrap; flex-shrink:0; }

#sidebar-status { padding:6px 14px 8px; font-size:11px; color:var(--ph); border-top:1px solid var(--brd); text-align:center; }

/* Main */
#main { flex:1; display:flex; flex-direction:column; overflow:hidden; }

#empty-state { flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:14px; color:var(--txt2); font-size:14px; }
#empty-state i { font-size:48px; opacity:0.3; }

/* Editor */
#editor-view { flex:1; display:none; flex-direction:column; overflow:hidden; }

#editor-toolbar { display:flex; align-items:flex-end; gap:8px; padding:16px 24px 0; border-bottom:1px solid var(--brd); }
.title-wrap { display:flex; align-items:center; gap:10px; flex:1; }
.title-wrap i { font-size:22px; color:var(--ph); }

#doc-title { flex:1; background:none; border:none; color:var(--txt); font-size:26px; font-weight:700; outline:none; padding:0 0 14px; font-family:var(--font); }
#doc-title::placeholder { color:var(--ph); }

.editor-actions { display:flex; gap:4px; flex-shrink:0; padding-bottom:8px; }
.editor-actions button { background:none; border:none; color:var(--txt2); cursor:pointer; width:32px; height:32px; border-radius:var(--rad); display:flex; align-items:center; justify-content:center; font-size:15px; }
.editor-actions button:hover { background:var(--hov); color:var(--txt); }
.editor-actions .del-btn:hover { color:var(--red); }

#editor-container { flex:1; overflow:auto; }
#doc-content { width:100%; height:100%; min-height:300px; background:none; border:none; color:var(--txt); font-size:14px; line-height:1.8; padding:20px 24px; resize:none; outline:none; font-family:var(--mono); display:block; }
#doc-content::placeholder { color:var(--ph); }
#doc-preview { width:100%; min-height:300px; padding:20px 24px; background:var(--bg); display:none; }

.markdown-body { background:transparent !important; color:var(--txt) !important; font-family:var(--font) !important; }
.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6 { color:var(--txt) !important; border-bottom-color:var(--brd) !important; }
.markdown-body a { color:var(--blue) !important; }
.markdown-body code,.markdown-body pre { background:var(--bg3, #2a2a2a) !important; border-radius:var(--rad) !important; }
.markdown-body pre { border:1px solid var(--brd) !important; padding:16px !important; }
.markdown-body blockquote { border-left-color:var(--blue) !important; color:var(--txt2) !important; }
.markdown-body img { max-width:100%; }