:root{--bg:#fff;--bg-subtle:#f7f7f5;--surface:#fff;--surface-hover:#f1f1ef;--border:#e8e8e4;--border-strong:#d8d8d2;--text:#1a1a1a;--text-muted:#6b6b66;--text-faint:#9a9a94;--accent:#2f6fed;--accent-hover:#245ad0;--accent-soft:#eaf1ff;--danger:#d64545;--radius:10px;--radius-sm:6px;--shadow-sm:0 1px 2px #0000000a;--shadow-md:0 4px 16px #00000014;--sidebar-w:260px}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#1a1a19;--bg-subtle:#202020;--surface:#242423;--surface-hover:#2e2e2c;--border:#34342f;--border-strong:#414139;--text:#ededea;--text-muted:#a3a39c;--text-faint:#6f6f68;--accent:#5b8dff;--accent-hover:#6f9bff;--accent-soft:#23324f;--danger:#ff6b6b;--shadow-sm:0 1px 2px #0000004d;--shadow-md:0 6px 20px #00000073}}:root[data-theme=dark]{--bg:#1a1a19;--bg-subtle:#202020;--surface:#242423;--surface-hover:#2e2e2c;--border:#34342f;--border-strong:#414139;--text:#ededea;--text-muted:#a3a39c;--text-faint:#6f6f68;--accent:#5b8dff;--accent-hover:#6f9bff;--accent-soft:#23324f;--danger:#ff6b6b;--shadow-sm:0 1px 2px #0000004d;--shadow-md:0 6px 20px #00000073}*{box-sizing:border-box}html,body,#root{height:100%}body{color:var(--text);background:var(--bg-subtle);-webkit-font-smoothing:antialiased;margin:0;font-family:Inter,Noto Sans JP,system-ui,-apple-system,Segoe UI,Hiragino Kaku Gothic ProN,sans-serif;line-height:1.6}button{font:inherit;cursor:pointer;color:inherit;background:0 0;border:none}a{color:inherit;text-decoration:none}.btn{border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--surface);color:var(--text);align-items:center;gap:.5rem;padding:.5rem .9rem;font-size:.9rem;font-weight:500;transition:background .12s,border-color .12s,transform 50ms;display:inline-flex}.btn:hover{background:var(--surface-hover)}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.55;cursor:default}.btn-primary{background:linear-gradient(135deg, var(--accent), var(--accent-hover));color:#fff;box-shadow:0 2px 8px color-mix(in srgb, var(--accent) 35%, transparent);border-color:#0000}.btn-primary:hover{filter:brightness(1.08);box-shadow:0 4px 14px color-mix(in srgb, var(--accent) 45%, transparent)}.btn-ghost{color:var(--text-muted);background:0 0;border-color:#0000}.btn-ghost:hover{background:var(--surface-hover);color:var(--text)}.app-shell{grid-template-columns:var(--sidebar-w) 1fr;min-height:100%;display:grid}.sidebar{border-right:1px solid var(--border);background:var(--bg);flex-direction:column;gap:1.25rem;padding:1.25rem .75rem;display:flex}.brand{letter-spacing:.02em;align-items:center;gap:.55rem;padding:.25rem .5rem;font-size:1.05rem;font-weight:700;display:flex}.brand-mark{background:linear-gradient(135deg, var(--accent), #8b5cf6);color:#fff;width:26px;height:26px;box-shadow:0 2px 6px color-mix(in srgb, var(--accent) 40%, transparent);border-radius:7px;place-items:center;font-size:.85rem;font-weight:700;display:grid}.nav-list{flex-direction:column;gap:.15rem;display:flex}.nav-label{text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin-bottom:.35rem;padding:0 .6rem;font-size:.72rem}.nav-item{border-radius:var(--radius-sm);color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;align-items:center;gap:.55rem;padding:.4rem .6rem;font-size:.9rem;display:flex;overflow:hidden}.nav-item:hover{background:var(--surface-hover);color:var(--text)}.nav-item .dot{background:var(--text-faint);border-radius:50%;flex-shrink:0;width:6px;height:6px}.content{width:100%;max-width:860px;padding:3rem clamp(1.25rem,5vw,4rem)}.page-head{margin-bottom:2rem}.page-head h1{letter-spacing:-.02em;background:linear-gradient(120deg, var(--text), var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;width:fit-content;margin:0 0 .4rem;font-size:2.1rem;font-weight:800}.page-head p{color:var(--text-muted);margin:0}.toolbar-row{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.section-title{text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint);font-size:.8rem;font-weight:600}.doc-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:.9rem;display:grid}.doc-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-sm);flex-direction:column;gap:.55rem;padding:1rem;transition:border-color .15s,box-shadow .15s,transform .12s;animation:.3s both card-in;display:flex;position:relative;overflow:hidden}.doc-card:before{content:"";background:linear-gradient(90deg, var(--accent), #8b5cf6);opacity:0;height:3px;transition:opacity .15s;position:absolute;inset:0 0 auto}.doc-card:hover{border-color:color-mix(in srgb, var(--accent) 40%, var(--border));box-shadow:var(--shadow-md);transform:translateY(-3px)}.doc-card:hover:before{opacity:1}@keyframes card-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.doc-card-excerpt{color:var(--text-muted);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:.83rem;line-height:1.5;display:-webkit-box;overflow:hidden}.doc-card-icon{background:var(--accent-soft);width:34px;height:34px;color:var(--accent);border-radius:8px;place-items:center;font-size:1rem;display:grid}.doc-card-title{text-overflow:ellipsis;white-space:nowrap;font-size:.95rem;font-weight:600;overflow:hidden}.doc-card-meta{color:var(--text-faint);font-size:.8rem}.empty{border:1px dashed var(--border-strong);border-radius:var(--radius);text-align:center;color:var(--text-muted);background:var(--bg);padding:2.5rem 1.5rem}.empty-emoji{margin-bottom:.5rem;font-size:1.8rem}.alert{border-radius:var(--radius-sm);background:color-mix(in srgb, var(--danger) 12%, transparent);color:var(--danger);margin-top:1rem;padding:.6rem .8rem;font-size:.88rem}.editor-shell{background:var(--bg);flex-direction:column;height:100dvh;display:flex;overflow:hidden}.editor-bar{z-index:5;border-bottom:1px solid var(--border);background:color-mix(in srgb, var(--bg) 85%, transparent);-webkit-backdrop-filter:saturate(180%)blur(8px);backdrop-filter:saturate(180%)blur(8px);justify-content:space-between;align-items:center;gap:1rem;padding:.7rem clamp(1rem,4vw,2rem);display:flex;position:sticky;top:0}.editor-bar-left,.editor-bar-right{align-items:center;gap:.75rem;display:flex}.back-link{color:var(--text-muted);border-radius:var(--radius-sm);align-items:center;gap:.35rem;padding:.35rem .5rem;font-size:.9rem;display:inline-flex}.back-link:hover{background:var(--surface-hover);color:var(--text)}.presence{color:var(--text-muted);align-items:center;gap:.45rem;font-size:.85rem;display:flex}.presence-avatars{display:flex}.presence-avatars .avatar{border:2px solid var(--bg);color:#fff;border-radius:50%;place-items:center;width:22px;height:22px;margin-left:-7px;font-size:.65rem;font-weight:600;display:grid}.presence-avatars .avatar:first-child{margin-left:0}.live-badge{align-items:center;gap:.35rem;display:inline-flex}.live-dot{background:#37c871;border-radius:50%;width:7px;height:7px;animation:2s infinite pulse;box-shadow:0 0 #37c87199}@keyframes pulse{0%{box-shadow:0 0 #37c8718c}70%{box-shadow:0 0 0 6px #37c87100}to{box-shadow:0 0 #37c87100}}.segmented{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-subtle);display:inline-flex;overflow:hidden}.segmented button{color:var(--text-muted);padding:.3rem .7rem;font-size:.82rem}.segmented button.active{background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm);font-weight:600}.char-count{color:var(--text-faint);white-space:nowrap;font-size:.8rem}.md-toolbar{border-bottom:1px solid var(--border);background:var(--bg);flex-wrap:wrap;align-items:center;gap:.35rem;padding:.4rem clamp(1rem,4vw,2rem);display:flex}.md-toolbar-group{border-right:1px solid var(--border);gap:.1rem;margin-right:.1rem;padding-right:.45rem;display:inline-flex}.md-toolbar-group:last-of-type{border-right:none}.md-toolbar button{border-radius:var(--radius-sm);min-width:30px;height:30px;color:var(--text-muted);place-items:center;padding:0 .45rem;font-size:.85rem;display:inline-grid}.md-toolbar button:hover{background:var(--surface-hover);color:var(--text)}.toolbar-status{color:var(--text-muted);margin-left:.5rem;font-size:.8rem}.toolbar-status.error{color:var(--danger)}.workspace{flex:1;min-height:0;display:grid}.workspace.mode-edit{grid-template-columns:1fr}.workspace.mode-edit .preview-pane{display:none}.workspace.mode-split{grid-template-columns:1fr 1fr}.workspace.mode-preview{grid-template-columns:1fr}.workspace.mode-preview .editor-pane{display:none}.editor-pane{min-width:0;padding:1.5rem clamp(1rem,3vw,2rem) 4rem;overflow-y:auto}.workspace.mode-edit .editor-pane{width:100%;max-width:820px;margin:0 auto}.editor-pane .cm-editor{outline:none;font-size:1rem;line-height:1.75}.editor-pane .cm-editor.cm-focused{outline:none}.editor-pane .cm-gutters{color:var(--text-faint);background:0 0;border:none}.editor-pane .cm-content{caret-color:var(--accent);font-family:SFMono-Regular,Menlo,Consolas,ui-monospace,monospace}.preview-pane{border-left:1px solid var(--border);background:var(--bg-subtle);min-width:0;padding:1.5rem clamp(1rem,3vw,2rem) 4rem;overflow-y:auto}.workspace.mode-preview .preview-pane{background:var(--bg);border-left:none}.workspace.mode-preview .md-preview{max-width:780px;margin:0 auto}.md-preview{word-break:break-word;line-height:1.8}.md-preview>:first-child{margin-top:0}.md-preview h1,.md-preview h2{border-bottom:1px solid var(--border);margin-top:1.6em;padding-bottom:.3rem}.md-preview h1{font-size:1.7rem}.md-preview h2{font-size:1.35rem}.md-preview h3{font-size:1.15rem}.md-preview img{border-radius:var(--radius-sm);max-width:100%;box-shadow:var(--shadow-sm)}.md-preview a{color:var(--accent);text-decoration:underline}.md-preview blockquote{border-left:3px solid var(--border-strong);color:var(--text-muted);margin:1em 0;padding:.2em 1em}.md-preview code{background:var(--surface-hover);border-radius:4px;padding:.12em .35em;font-family:SFMono-Regular,Menlo,Consolas,ui-monospace,monospace;font-size:.88em}.md-preview pre{background:var(--surface-hover);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.8rem 1rem;overflow-x:auto}.md-preview pre code{background:0 0;padding:0}.md-preview table{border-collapse:collapse;margin:1em 0;display:block;overflow-x:auto}.md-preview th,.md-preview td{border:1px solid var(--border-strong);padding:.35rem .7rem}.md-preview th{background:var(--surface-hover)}.md-preview hr{border:none;border-top:1px solid var(--border-strong);margin:1.6em 0}.md-preview ul,.md-preview ol{padding-left:1.6em}.md-preview li:has(>input[type=checkbox]){margin-left:-1.3em;list-style:none}.md-preview input[type=checkbox]{accent-color:var(--accent);margin-right:.4em}.toast{color:var(--text-muted);font-size:.85rem}.title-input{font:inherit;color:var(--text);border-radius:var(--radius-sm);background:0 0;border:1px solid #0000;width:clamp(120px,24vw,300px);padding:.3rem .55rem;font-size:.95rem;font-weight:600}.title-input:hover{border-color:var(--border)}.title-input:focus{border-color:var(--accent);background:var(--bg);outline:none}.icon-btn{border-radius:var(--radius-sm);padding:.35rem .5rem;font-size:.95rem}.search-input{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);flex:1;max-width:340px;padding:.45rem .8rem;font-size:.9rem}.search-input:focus{border-color:var(--accent);outline:none}.doc-card-top{justify-content:space-between;align-items:flex-start;display:flex}.doc-card-remove{border-radius:var(--radius-sm);width:24px;height:24px;color:var(--text-faint);opacity:0;font-size:1rem;line-height:1;transition:opacity .12s}.doc-card:hover .doc-card-remove{opacity:1}.doc-card-remove:hover{background:var(--surface-hover);color:var(--danger)}.toc-panel{z-index:10;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);width:260px;max-height:60vh;box-shadow:var(--shadow-md);padding:.5rem;position:absolute;top:0;left:clamp(1rem,4vw,2rem);overflow-y:auto}.workspace{position:relative}.toc-head{text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint);justify-content:space-between;align-items:center;padding:.25rem .5rem .4rem;font-size:.78rem;display:flex}.toc-head button{color:var(--text-faint);border-radius:var(--radius-sm);padding:0 .3rem}.toc-head button:hover{background:var(--surface-hover);color:var(--text)}.toc-empty{color:var(--text-faint);margin:.3rem .5rem .5rem;font-size:.85rem}.toc-item{text-align:left;border-radius:var(--radius-sm);width:100%;color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;padding:.3rem .5rem;font-size:.88rem;display:block;overflow:hidden}.toc-item:hover{background:var(--surface-hover);color:var(--text)}.toc-item.level-2{padding-left:1.2rem}.toc-item.level-3{padding-left:1.9rem}.history-panel{left:auto;right:clamp(1rem,4vw,2rem)}.history-save{justify-content:center;width:calc(100% - 1rem);margin:0 .5rem .5rem;font-size:.83rem}.history-item{justify-content:space-between;align-items:center;gap:.5rem;display:flex}.history-chars{color:var(--text-faint);flex-shrink:0;font-size:.75rem}.cm-tooltip.cm-tooltip-autocomplete{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-md);overflow:hidden}.cm-tooltip-autocomplete ul li{color:var(--text-muted);font-size:.88rem;padding:.35rem .6rem!important;font-family:inherit!important}.cm-tooltip-autocomplete ul li[aria-selected]{background:var(--accent-soft)!important;color:var(--text)!important}.cm-completionDetail{color:var(--text-faint);margin-left:.8em;font-style:normal!important}.cm-editor .cm-cursor{border-left-color:var(--accent)}.cm-editor .cm-activeLine{background:color-mix(in srgb, var(--accent) 4%, transparent)}.cm-editor .cm-activeLineGutter{background:0 0}:root{--md-code:#c2564f}:root[data-theme=dark]{--md-code:#e8837c}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--md-code:#e8837c}}@media (width<=860px){.workspace.mode-split{grid-template-rows:1fr 1fr;grid-template-columns:1fr}.workspace.mode-split .preview-pane{border-left:none;border-top:1px solid var(--border)}}@media (width<=720px){.app-shell{grid-template-columns:1fr}.sidebar{display:none}.content{padding:2rem 1.25rem}}