:root{--bg-color: #ffffff;--surface-color: #f8f9fa;--surface-hover: #e9ecef;--border-color: #dee2e6;--text-color: #212529;--text-muted: #6c757d;--accent-color: #0d6efd;--accent-hover: #0b5ed7;--danger-color: #dc3545;--success-color: #198754;--warning-color: #ffc107;--header-bg: #ffffff;--sidebar-bg: #f8f9fa;--card-bg: #ffffff;--input-bg: #ffffff;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .15);--radius: 6px;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;--transition: .2s ease}[data-theme=dark]{--bg-color: #0d1117;--surface-color: #161b22;--surface-hover: #21262d;--border-color: #30363d;--text-color: #c9d1d9;--text-muted: #8b949e;--accent-color: #58a6ff;--accent-hover: #79b8ff;--danger-color: #f85149;--success-color: #3fb950;--warning-color: #d29922;--header-bg: #161b22;--sidebar-bg: #0d1117;--card-bg: #161b22;--input-bg: #0d1117;--shadow: 0 1px 3px rgba(0, 0, 0, .4);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .5)}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}body{font-family:var(--font-sans);background:var(--bg-color);color:var(--text-color);line-height:1.5;min-height:100vh;transition:background var(--transition),color var(--transition)}#app{min-height:100vh}.app-layout{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem;height:56px;background:var(--header-bg);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:100}.app-header .logo{font-size:1.25rem;font-weight:700;color:var(--accent-color);text-decoration:none;cursor:pointer}.app-header nav{display:flex;gap:1.5rem;align-items:center}.app-header nav a{color:var(--text-muted);text-decoration:none;font-size:.875rem;font-weight:500;cursor:pointer;transition:color var(--transition)}.app-header nav a:hover,.app-header nav a.active{color:var(--text-color)}.app-header .header-actions{display:flex;gap:.75rem;align-items:center}.app-main{flex:1;padding:1.5rem;max-width:1400px;width:100%;margin:0 auto}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.5rem 1rem;border:1px solid transparent;border-radius:var(--radius);font-size:.875rem;font-weight:500;cursor:pointer;background:var(--surface-color);color:var(--text-color);transition:all var(--transition)}.btn:hover{background:var(--surface-hover)}.btn-primary{background:var(--accent-color);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-danger{background:var(--danger-color);color:#fff}.btn-ghost{background:transparent;border-color:var(--border-color)}.btn-sm{padding:.25rem .75rem;font-size:.8125rem}input[type=text],input[type=email],input[type=password],select,textarea{width:100%;padding:.5rem .75rem;border:1px solid var(--border-color);border-radius:var(--radius);background:var(--input-bg);color:var(--text-color);font-size:.875rem;font-family:inherit;transition:border-color var(--transition)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent-color)}input::placeholder{color:var(--text-muted)}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.375rem;font-size:.875rem;font-weight:500;color:var(--text-muted)}.form-error{color:var(--danger-color);font-size:.8125rem;margin-top:.25rem}.card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius);padding:1.25rem;box-shadow:var(--shadow);transition:box-shadow var(--transition),transform var(--transition);cursor:pointer}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}.card-title{font-size:1rem;font-weight:600;margin-bottom:.5rem;color:var(--text-color)}.card-meta{font-size:.8125rem;color:var(--text-muted)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:2rem}.stat-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius);padding:1.25rem;text-align:center}.stat-value{font-size:2rem;font-weight:700;color:var(--accent-color)}.stat-label{font-size:.875rem;color:var(--text-muted);margin-top:.25rem}.notes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:1rem}.login-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius);padding:2rem;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.login-card h1{text-align:center;margin-bottom:1.5rem;font-size:1.5rem}.login-card .form-actions{margin-top:1.5rem}.login-card .form-actions .btn{width:100%}.login-card .form-footer{text-align:center;margin-top:1rem;font-size:.875rem;color:var(--text-muted)}.login-card .form-footer a{color:var(--accent-color);cursor:pointer;text-decoration:none}.notes-page{display:flex;gap:1rem;height:calc(100vh - 56px - 3rem);min-height:500px}.notes-sidebar{width:280px;flex-shrink:0;background:var(--sidebar-bg);border:1px solid var(--border-color);border-radius:var(--radius);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:1rem;border-bottom:1px solid var(--border-color)}.sidebar-header input{margin-bottom:.5rem}.sidebar-list{flex:1;overflow-y:auto;padding:.5rem}.sidebar-item{padding:.625rem .75rem;border-radius:var(--radius);cursor:pointer;transition:background var(--transition);margin-bottom:.25rem}.sidebar-item:hover{background:var(--surface-hover)}.sidebar-item.active{background:var(--accent-color);color:#fff}.sidebar-item .item-title{font-size:.875rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-item .item-meta{font-size:.75rem;opacity:.7;margin-top:.125rem}.notes-editor-pane{flex:1;display:flex;flex-direction:column;gap:.75rem;overflow:hidden}.editor-meta{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}.editor-meta input[type=text]{flex:1;min-width:200px;font-size:1.125rem;font-weight:600}.editor-meta select{width:160px}.tags-checkboxes{display:flex;flex-wrap:wrap;gap:.5rem}.tag-checkbox{display:flex;align-items:center;gap:.25rem;padding:.25rem .5rem;background:var(--surface-color);border:1px solid var(--border-color);border-radius:var(--radius);font-size:.8125rem;cursor:pointer;-webkit-user-select:none;user-select:none}.tag-checkbox input{width:auto;margin:0}.tag-checkbox.checked{background:var(--accent-color);color:#fff;border-color:var(--accent-color)}.editor-wrapper{flex:1;overflow:hidden;border:1px solid var(--border-color);border-radius:var(--radius)}.markdown-editor{height:100%;display:flex;flex-direction:column}.editor-toolbar{display:flex;align-items:center;gap:.5rem;padding:.5rem .75rem;border-bottom:1px solid var(--border-color);background:var(--surface-color)}.mode-btn{padding:.25rem .75rem;border:1px solid var(--border-color);border-radius:var(--radius);background:var(--input-bg);color:var(--text-color);font-size:.8125rem;cursor:pointer;transition:all var(--transition)}.mode-btn.active{background:var(--accent-color);color:#fff;border-color:var(--accent-color)}.save-status{margin-left:auto;font-size:.8125rem;color:var(--text-muted)}.save-status.status-saving{color:var(--warning-color)}.save-status.status-saved{color:var(--success-color)}.save-status.status-error{color:var(--danger-color)}.editor-content-area{flex:1;overflow:auto}.editor-content-area .cm-editor{height:100%}.editor-content-area .cm-editor .cm-content{font-size:14px;font-family:var(--font-mono)}.markdown-preview{padding:1rem;overflow:auto;height:100%}.markdown-preview h1,.markdown-preview h2,.markdown-preview h3,.markdown-preview h4{margin-top:1.5rem;margin-bottom:.75rem}.markdown-preview p{margin-bottom:.75rem}.markdown-preview ul,.markdown-preview ol{margin-bottom:.75rem;padding-left:1.5rem}.markdown-preview code{background:var(--surface-color);padding:.125rem .375rem;border-radius:3px;font-family:var(--font-mono);font-size:.875em}.markdown-preview pre{background:var(--surface-color);padding:1rem;border-radius:var(--radius);overflow-x:auto;margin-bottom:.75rem}.markdown-preview pre code{background:none;padding:0}.markdown-preview blockquote{border-left:3px solid var(--accent-color);padding-left:1rem;margin-bottom:.75rem;color:var(--text-muted)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;color:var(--text-muted);text-align:center}.empty-state h2{margin-bottom:.5rem;color:var(--text-color)}.inline-form{display:flex;gap:.75rem;margin-bottom:1.5rem;max-width:600px}.input-grow{flex:1}.input-inline{flex:1;padding:.5rem .75rem;border:1px solid var(--accent-color);border-radius:var(--radius);background:var(--input-bg);color:var(--text-color);font-size:.875rem}.list-container{max-width:800px}.list-row{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius);margin-bottom:.5rem;transition:background var(--transition)}.list-row:hover{background:var(--surface-color)}.row-info{display:flex;align-items:center;gap:1rem;flex:1;min-width:0}.row-name{font-weight:500;cursor:pointer;color:var(--accent-color)}.row-name:hover{text-decoration:underline}.row-meta{font-size:.8125rem;color:var(--text-muted);white-space:nowrap}.row-actions{display:flex;gap:.5rem}.tags-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}.tag-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:var(--radius);padding:1rem;display:flex;flex-direction:column;gap:.5rem}.tag-name{font-weight:600;font-size:1rem}.tag-count{font-size:.8125rem;color:var(--text-muted)}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}.page-header h1{font-size:1.5rem;font-weight:700}.section{margin-bottom:2rem}.section-title{font-size:1.125rem;font-weight:600;margin-bottom:1rem}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}