:root{--navy: #12192b;--navy2: #1c2540;--navy3: #252f4a;--indigo: #4f46e5;--sky: #a5b4fc;--cream: #f0f2ff;--text: #e2e8f0;--muted: #94a3b8;--border: #2d3a5c;--sidebar-w: 260px}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,sans-serif;background:var(--navy);color:var(--text);font-size:14px;line-height:1.6}a{color:var(--sky);text-decoration:none}a:hover{text-decoration:underline}.app{display:flex;flex-direction:column;height:100vh}.header{display:flex;align-items:center;gap:12px;padding:0 16px;height:48px;background:var(--navy2);border-bottom:1px solid var(--border);flex-shrink:0}.header-logo{font-weight:700;font-size:15px;color:var(--sky);letter-spacing:-.3px}.header-logo span{color:var(--indigo)}.space-switcher{display:flex;gap:4px;margin-left:auto}.space-btn{padding:4px 10px;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--muted);cursor:pointer;font-size:12px;font-weight:500;transition:all .15s}.space-btn:hover{color:var(--text);border-color:var(--sky)}.space-btn.active{background:var(--indigo);color:#fff;border-color:var(--indigo)}.body{display:flex;flex:1;overflow:hidden}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--navy2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-search{padding:10px 12px;border-bottom:1px solid var(--border)}.sidebar-search input{width:100%;padding:6px 10px;border-radius:6px;border:1px solid var(--border);background:var(--navy3);color:var(--text);font-size:13px;outline:none}.sidebar-search input::placeholder{color:var(--muted)}.sidebar-search input:focus{border-color:var(--indigo)}.sidebar-actions{display:flex;align-items:center;justify-content:space-between;padding:8px 12px}.sidebar-label{font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.btn-icon{width:24px;height:24px;display:flex;align-items:center;justify-content:center;border:none;background:transparent;color:var(--muted);cursor:pointer;border-radius:4px;font-size:18px;line-height:1}.btn-icon:hover{background:var(--navy3);color:var(--text)}.note-list{flex:1;overflow-y:auto}.note-item{padding:8px 12px;border-bottom:1px solid var(--border);cursor:pointer;transition:background .1s}.note-item:hover{background:var(--navy3)}.note-item.active{background:var(--navy3);border-left:3px solid var(--indigo)}.note-item-title{font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.note-item-date{font-size:11px;color:var(--muted);margin-top:2px}.note-list-empty{padding:24px 12px;text-align:center;color:var(--muted);font-size:13px}.main,.editor-wrap{flex:1;display:flex;flex-direction:column;overflow:hidden}.editor-header{padding:12px 24px 0;border-bottom:1px solid var(--border)}.editor-title{font-size:22px;font-weight:700;color:var(--text);background:transparent;border:none;outline:none;width:100%;padding:0 0 12px}.editor-title::placeholder{color:var(--muted)}.editor-content{flex:1;overflow-y:auto;padding:20px 24px}.ProseMirror{outline:none;min-height:200px;font-size:15px;line-height:1.75;color:var(--text)}.ProseMirror p.is-editor-empty:first-child:before{content:attr(data-placeholder);color:var(--muted);pointer-events:none;float:left;height:0}.ProseMirror h1,.ProseMirror h2,.ProseMirror h3{color:var(--cream);margin:1.2em 0 .4em}.ProseMirror h1{font-size:1.6em}.ProseMirror h2{font-size:1.3em}.ProseMirror h3{font-size:1.1em}.ProseMirror code{background:var(--navy3);border-radius:4px;padding:1px 5px;font-size:.88em}.ProseMirror pre{background:var(--navy3);border-radius:8px;padding:12px 16px;overflow-x:auto}.ProseMirror pre code{background:none;padding:0}.ProseMirror blockquote{border-left:3px solid var(--indigo);margin:0;padding-left:16px;color:var(--muted)}.editor-status{padding:6px 24px;font-size:11px;color:var(--muted);border-top:1px solid var(--border)}.backlinks{border-top:1px solid var(--border);padding:12px 24px;background:var(--navy2)}.backlinks-label{font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}.backlink-item{display:inline-block;margin:0 6px 6px 0;padding:3px 10px;background:var(--navy3);border-radius:999px;font-size:12px;color:var(--sky)}.graph-view{flex:1;width:100%;height:100%}.graph-node circle{cursor:pointer;transition:r .1s}.graph-node text{pointer-events:none;font-size:11px;fill:var(--muted)}.empty-state{flex:1;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:14px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100}.modal{background:var(--navy2);border:1px solid var(--border);border-radius:10px;padding:20px;width:380px}.modal h3{margin:0 0 14px;font-size:15px}.modal input{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:6px;background:var(--navy3);color:var(--text);font-size:14px;outline:none;margin-bottom:10px}.modal input:focus{border-color:var(--indigo)}.modal-actions{display:flex;gap:8px;justify-content:flex-end}.btn{padding:6px 14px;border-radius:6px;border:none;cursor:pointer;font-size:13px;font-weight:500}.btn-primary{background:var(--indigo);color:#fff}.btn-primary:hover{background:#4338ca}.btn-ghost{background:var(--navy3);color:var(--muted)}.btn-ghost:hover{color:var(--text)}