:root{--bg: #f6f7f9;--panel: #ffffff;--border: #e4e7ec;--text: #1f2430;--text-soft: #8a92a3;--accent: #4f7cff;--accent-soft: #eef2ff;--danger-hover-bg: #fdeced;--danger: #e5484d;--success: #30a46c}[data-theme=dark]{--bg: #16181d;--panel: #1e2128;--border: #2e3340;--text: #e6e9f0;--text-soft: #9aa3b5;--accent: #6b8fff;--accent-soft: #262d44;--danger-hover-bg: #3a2326;--danger: #ff7377;--success: #4cc38a;color-scheme:dark}[data-theme=light]{color-scheme:light}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans TC,Microsoft JhengHei,sans-serif;background:var(--bg);color:var(--text);transition:background-color .2s ease,color .2s ease}html,body,#root{height:100%}.app{display:flex;height:100%}.sidebar{width:300px;min-width:260px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px 14px 10px}.sidebar-header h1{font-size:17px;margin:0}.sidebar-actions{display:flex;align-items:center;gap:6px}.icon-btn{background:transparent;border:1px solid var(--border);border-radius:8px;padding:5px 8px;font-size:13px;cursor:pointer;line-height:1;color:var(--text)}.icon-btn:hover{background:var(--accent-soft)}.btn-primary{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:7px 12px;font-size:13px;cursor:pointer;font-weight:600}.btn-primary:hover{filter:brightness(1.08)}.search{margin:4px 14px 10px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-size:13px;outline:none}.search:focus{border-color:var(--accent)}.note-list{list-style:none;margin:0;padding:4px 8px;overflow-y:auto;flex:1}.note-item{position:relative;padding:10px 34px 10px 12px;border-radius:8px;cursor:pointer;margin-bottom:2px}.note-item:hover{background:var(--accent-soft)}.note-item.active{background:var(--accent-soft);box-shadow:inset 3px 0 0 var(--accent)}.note-item-title{display:block;font-size:13.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding-right:20px}.note-item-date{display:block;font-size:11.5px;color:var(--text-soft);margin-top:3px}.note-item-delete{position:absolute;right:10px;top:50%;transform:translateY(-50%);border:none;background:transparent;color:var(--text-soft);cursor:pointer;border-radius:5px;padding:4px;font-size:11px;opacity:0}.note-item:hover .note-item-delete{opacity:1}.note-item-delete:hover{color:var(--danger);background:var(--danger-hover-bg)}.empty-hint{text-align:center;color:var(--text-soft);font-size:13px;padding:24px 8px}.sidebar-footer{padding:10px 14px;border-top:1px solid var(--border);font-size:11.5px;color:var(--text-soft)}.editor{flex:1;display:flex;flex-direction:column;min-width:0}.editor-header{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--panel);font-size:12.5px;color:var(--text-soft)}.autosave{color:var(--success)}.editor-textarea{flex:1;border:none;outline:none;resize:none;padding:24px 28px;font-size:15.5px;line-height:1.75;font-family:ui-monospace,Cascadia Code,Consolas,monospace;background:var(--bg);color:var(--text)}.editor-placeholder{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text-soft);font-size:15px}@media(max-width:640px){.app{flex-direction:column}.sidebar{width:100%;max-height:45%;border-right:none;border-bottom:1px solid var(--border)}}