:root{--color-bg-base: #0d1117;--color-bg-surface: #161b22;--color-bg-elevated: #1c2128;--color-bg-overlay: #21262d;--color-bg-sidebar: #0d1117;--color-bg-notelist: #161b22;--color-bg-editor: #1c2128;--color-text-primary: #e6edf3;--color-text-secondary: #8b949e;--color-text-tertiary: #6e7681;--color-text-muted: #484f58;--color-text-link: #58a6ff;--color-accent: #58a6ff;--color-accent-hover: #79b8ff;--color-accent-active: #388bfd;--color-accent-subtle: rgba(56, 139, 253, .15);--color-border-default: #30363d;--color-border-muted: #21262d;--color-border-strong: #484f58;--color-success: #3fb950;--color-warning: #d29922;--color-error: #f85149;--color-info: #58a6ff;--color-status-none: #6e7681;--color-status-active: #58a6ff;--color-status-on-hold: #d29922;--color-status-completed: #3fb950;--color-status-dropped: #f85149;--color-tag-default-bg: rgba(110, 118, 129, .15);--color-tag-default-text: #8b949e;--color-tag-red-bg: rgba(248, 81, 73, .15);--color-tag-red-text: #f85149;--color-tag-orange-bg: rgba(210, 153, 34, .15);--color-tag-orange-text: #d29922;--color-tag-yellow-bg: rgba(210, 153, 34, .15);--color-tag-yellow-text: #e3b341;--color-tag-green-bg: rgba(63, 185, 80, .15);--color-tag-green-text: #3fb950;--color-tag-teal-bg: rgba(57, 211, 196, .15);--color-tag-teal-text: #39d3c4;--color-tag-blue-bg: rgba(88, 166, 255, .15);--color-tag-blue-text: #58a6ff;--color-tag-violet-bg: rgba(163, 113, 247, .15);--color-tag-violet-text: #a371f7;--color-tag-purple-bg: rgba(163, 113, 247, .15);--color-tag-purple-text: #bc8cff;--color-tag-pink-bg: rgba(219, 97, 162, .15);--color-tag-pink-text: #db61a2;--syntax-bg: #282a36;--syntax-fg: #f8f8f2;--syntax-selection: #44475a;--syntax-comment: #6272a4;--syntax-cyan: #8be9fd;--syntax-green: #50fa7b;--syntax-orange: #ffb86c;--syntax-pink: #ff79c6;--syntax-purple: #bd93f9;--syntax-red: #ff5555;--syntax-yellow: #f1fa8c;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";--font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--text-4xl: 2.25rem;--font-normal: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--leading-none: 1;--leading-tight: 1.25;--leading-snug: 1.375;--leading-normal: 1.5;--leading-relaxed: 1.625;--leading-loose: 2;--space-0: 0;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--space-20: 5rem;--space-24: 6rem;--sidebar-width: 220px;--sidebar-collapsed-width: 56px;--notelist-width: 280px;--notelist-min-width: 240px;--notelist-max-width: 400px;--header-height: 48px;--mobile-header-height: 56px;--radius-none: 0;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-2xl: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -2px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4), 0 4px 6px -4px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .4), 0 8px 10px -6px rgba(0, 0, 0, .3);--shadow-dropdown: 0 4px 12px rgba(0, 0, 0, .4), 0 0 0 1px var(--color-border-default);--shadow-modal: 0 16px 48px rgba(0, 0, 0, .5), 0 0 0 1px var(--color-border-default);--duration-instant: 50ms;--duration-fast: .1s;--duration-normal: .2s;--duration-slow: .3s;--ease-in: cubic-bezier(.4, 0, 1, 1);--ease-out: cubic-bezier(0, 0, .2, 1);--ease-in-out: cubic-bezier(.4, 0, .2, 1);--transition-colors: color var(--duration-fast) var(--ease-in-out), background-color var(--duration-fast) var(--ease-in-out), border-color var(--duration-fast) var(--ease-in-out);--transition-opacity: opacity var(--duration-normal) var(--ease-in-out);--transition-transform: transform var(--duration-normal) var(--ease-out);--transition-all: all var(--duration-normal) var(--ease-in-out)}@keyframes slideInUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:#fff3}*{scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.1) transparent}::selection{background:var(--color-accent-subtle);color:var(--color-text-primary)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-sans);font-size:16px;line-height:var(--leading-normal);color:var(--color-text-primary);background:var(--color-bg-base);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{height:100%}a{color:var(--color-text-link);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:var(--font-medium);cursor:pointer;transition:var(--transition-all);border:1px solid transparent;background:none;outline:none}.btn-secondary{background:var(--color-bg-elevated);color:var(--color-text-primary);border-color:var(--color-border-default)}.btn-secondary:hover:not(:disabled){background:var(--color-bg-overlay);border-color:var(--color-border-strong)}.btn-ghost{background:transparent;color:var(--color-text-secondary)}.btn-ghost:hover:not(:disabled){background:#ffffff0d;color:var(--color-text-primary)}.btn-danger{background:var(--color-error);color:#fff;border-color:var(--color-error)}.btn-danger:hover:not(:disabled){background:#d32f2f;border-color:#d32f2f}.input{width:100%;padding:var(--space-2) var(--space-3);background:var(--color-bg-base);border:1px solid var(--color-border-default);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-text-primary);transition:var(--transition-colors);outline:none}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--color-bg-base);padding:var(--space-4)}.login-card{width:100%;max-width:380px;padding:var(--space-8);background:var(--color-bg-surface);border:1px solid var(--color-border-default);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl)}.login-logo{width:64px;height:64px;margin:0 auto var(--space-6);display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-accent),#a855f7);border-radius:var(--radius-xl);color:#fff;font-size:var(--text-2xl);font-weight:var(--font-bold)}.login-title{font-size:var(--text-xl);font-weight:var(--font-semibold);color:var(--color-text-primary);text-align:center;margin-bottom:var(--space-6)}.login-form{display:flex;flex-direction:column;gap:var(--space-4)}.login-error{padding:var(--space-3);background:#f851491a;border:1px solid rgba(248,81,73,.3);border-radius:var(--radius-md);color:var(--color-error);font-size:var(--text-sm);text-align:center}.input{width:100%;padding:var(--space-3);background:var(--color-bg-base);border:1px solid var(--color-border-default);border-radius:var(--radius-md);font-size:var(--text-base);color:var(--color-text-primary);transition:var(--transition-colors);outline:none}.input::placeholder{color:var(--color-text-tertiary)}.input:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px var(--color-accent-subtle)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:var(--font-medium);cursor:pointer;transition:var(--transition-all);border:1px solid transparent;background:none;outline:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}.btn-primary:hover:not(:disabled){background:var(--color-accent-hover);border-color:var(--color-accent-hover)}.sidebar{width:var(--sidebar-width);background:var(--color-bg-sidebar);border-right:1px solid var(--color-border-muted);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border-muted);display:flex;align-items:center;justify-content:space-between}.sidebar-logo{display:flex;align-items:center;gap:var(--space-2)}.sidebar-logo-icon{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-accent),#a855f7);border-radius:var(--radius-md);color:#fff;font-size:var(--text-xs);font-weight:var(--font-bold)}.sidebar-logo-text{font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--color-text-primary)}.sidebar-logout{padding:var(--space-2);border:none;background:transparent;color:var(--color-text-tertiary);cursor:pointer;border-radius:var(--radius-md);transition:var(--transition-colors)}.sidebar-logout:hover{background:#ffffff0d;color:var(--color-text-primary)}.sidebar-search{padding:var(--space-3);border-bottom:1px solid var(--color-border-muted);position:relative}.sidebar-search-icon{position:absolute;left:calc(var(--space-3) + var(--space-2));top:50%;transform:translateY(-50%);color:var(--color-text-tertiary);pointer-events:none}.sidebar-search-input{width:100%;padding:var(--space-2) var(--space-3);padding-left:calc(var(--space-3) + 20px);background:var(--color-bg-elevated);border:1px solid var(--color-border-default);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-text-primary);outline:none;transition:var(--transition-colors)}.sidebar-search-input::placeholder{color:var(--color-text-tertiary)}.sidebar-search-input:focus{border-color:var(--color-accent)}.sidebar-nav{flex:1;overflow-y:auto;padding:var(--space-2) 0}.sidebar-section{margin-bottom:var(--space-2)}.sidebar-section-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-2) var(--space-4)}.sidebar-section-title{font-size:var(--text-xs);font-weight:var(--font-semibold);color:var(--color-text-tertiary);text-transform:uppercase;letter-spacing:.05em;padding:var(--space-2) var(--space-4)}.sidebar-section-header .sidebar-section-title{padding:0}.sidebar-add-btn{display:flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:var(--radius-md);background:transparent;border:none;color:var(--color-text-tertiary);cursor:pointer;transition:var(--transition-colors)}.sidebar-add-btn:hover{background:#ffffff1a;color:var(--color-accent)}.sidebar-item{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);color:var(--color-text-secondary);font-size:var(--text-sm);cursor:pointer;transition:var(--transition-colors);border-radius:0;margin:0 var(--space-2);border-radius:var(--radius-md)}.sidebar-item:hover{background:#ffffff0d;color:var(--color-text-primary)}.sidebar-item.active{background:var(--color-accent-subtle);color:var(--color-accent)}.sidebar-item-expand{display:flex;align-items:center;justify-content:center;width:16px;height:16px;color:var(--color-text-tertiary)}.sidebar-item-icon{flex-shrink:0;opacity:.7}.sidebar-item-label{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-item-count{font-size:var(--text-xs);color:var(--color-text-tertiary)}.sidebar-children{margin-left:var(--space-2)}.sidebar-status-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0;margin-left:4px;margin-right:4px}.context-menu{position:fixed;min-width:180px;background:var(--color-bg-overlay);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);box-shadow:var(--shadow-dropdown);padding:var(--space-1);z-index:1000;animation:fadeIn var(--duration-fast) var(--ease-out)}.context-menu-item{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-text-secondary);cursor:pointer;transition:var(--transition-colors);position:relative}.context-menu-item:hover{background:#ffffff0d;color:var(--color-text-primary)}.context-menu-item.selected{color:var(--color-accent)}.context-menu-item.disabled{color:var(--color-text-tertiary);cursor:default}.context-menu-item.disabled:hover{background:transparent}.context-menu-item.danger{color:var(--color-error)}.context-menu-item.danger:hover{background:#f851491a}.context-menu-item.has-submenu{padding-right:var(--space-2)}.submenu-arrow{margin-left:auto;opacity:.5}.context-submenu{position:absolute;left:calc(100% - 4px);top:-4px;min-width:160px;max-height:300px;overflow-y:auto;background:var(--color-bg-overlay);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);box-shadow:var(--shadow-dropdown);padding:var(--space-1);padding-left:calc(var(--space-1) + 4px)}.context-menu-item.has-submenu:after{content:"";position:absolute;right:-8px;top:0;width:12px;height:100%}.context-menu-divider{height:1px;background:var(--color-border-muted);margin:var(--space-1) 0}.status-dot,.tag-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.checkmark{margin-left:auto;color:var(--color-accent);font-size:var(--text-xs)}@keyframes fadeIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.notelist{width:var(--notelist-width);min-width:var(--notelist-min-width);max-width:var(--notelist-max-width);background:var(--color-bg-notelist);border-right:1px solid var(--color-border-muted);display:flex;flex-direction:column;overflow:hidden}.notelist-header{padding:var(--space-3) var(--space-4);border-bottom:1px solid 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var(--color-border-default);border-radius:var(--radius-lg);box-shadow:var(--shadow-dropdown);z-index:100;overflow:hidden}.tag-picker-list{max-height:200px;overflow-y:auto;padding:var(--space-1)}.tag-picker-item{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-text-secondary);cursor:pointer;transition:var(--transition-colors)}.tag-picker-item:hover{background:#ffffff0d;color:var(--color-text-primary)}.tag-picker-item.selected{color:var(--color-text-primary)}.tag-picker-item-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}.tag-picker-item-check{margin-left:auto;color:var(--color-accent)}.tag-picker-footer{border-top:1px solid var(--color-border-muted);padding:var(--space-1)}.tag-picker-new{display:flex;align-items:center;gap:var(--space-2);width:100%;padding:var(--space-2) 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var(--color-border-default);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-text-secondary);cursor:pointer;transition:var(--transition-colors)}.book-picker-trigger:hover{border-color:var(--color-border-strong);color:var(--color-text-primary)}.book-picker-chevron{margin-left:auto;transition:transform var(--duration-fast)}.book-picker-chevron.open{transform:rotate(90deg)}.book-picker-dropdown{position:absolute;bottom:calc(100% + var(--space-1));left:0;min-width:220px;background:var(--color-bg-overlay);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);box-shadow:var(--shadow-dropdown);z-index:100;overflow:hidden}.book-picker-list{max-height:250px;overflow-y:auto;padding:var(--space-1)}.book-picker-item{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-text-secondary);cursor:pointer;transition:var(--transition-colors)}.book-picker-item:hover{background:#ffffff0d;color:var(--color-text-primary)}.book-picker-item.selected{color:var(--color-text-primary);background:var(--color-accent-subtle)}.book-picker-check{margin-left:auto;color:var(--color-accent)}.book-picker-footer{border-top:1px solid var(--color-border-muted);padding:var(--space-1)}.book-picker-new{display:flex;align-items:center;gap:var(--space-2);width:100%;padding:var(--space-2) var(--space-3);background:none;border:none;border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-accent);cursor:pointer;transition:var(--transition-colors)}.book-picker-new:hover{background:var(--color-accent-subtle)}.book-picker-create{padding:var(--space-3);display:flex;flex-direction:column;gap:var(--space-3)}.book-picker-create-actions{display:flex;gap:var(--space-2);justify-content:flex-end}.dropdown{position:relative;display:inline-block}.dropdown-menu{position:absolute;min-width:180px;background:var(--color-bg-overlay);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);box-shadow:var(--shadow-dropdown);padding:var(--space-1);z-index:100;animation:slideInUp var(--duration-fast) var(--ease-out)}.dropdown-menu.bottom{top:calc(100% + var(--space-1))}.dropdown-menu.top{bottom:calc(100% + var(--space-1))}.dropdown-menu.left{left:0}.dropdown-menu.right{right:0}.dropdown-item{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--color-text-secondary);cursor:pointer;transition:var(--transition-colors)}.dropdown-item:hover{background:#ffffff0d;color:var(--color-text-primary)}.dropdown-item.danger{color:var(--color-error)}.dropdown-item.danger:hover{background:#f851491a}.dropdown-item-icon{display:flex;align-items:center;justify-content:center;width:16px;height:16px}.dropdown-divider{height:1px;background:var(--color-border-muted);margin:var(--space-1) 0}@keyframes 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pulse{0%,to{opacity:1}50%{opacity:.5}}.delete-confirm-content{text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--space-3)}.delete-confirm-icon{color:var(--color-error);opacity:.8}.delete-confirm-content p{margin:0;color:var(--color-text-primary)}.delete-confirm-warning{font-size:var(--text-sm);color:var(--color-text-tertiary)!important}@media(max-width:768px){.editor-header{padding:var(--space-3) var(--space-4);flex-wrap:wrap}.editor-title-input{font-size:var(--text-xl);width:100%}.editor-actions{width:100%;justify-content:flex-end}.editor-footer{padding:var(--space-3) var(--space-4);flex-direction:column;align-items:stretch;gap:var(--space-3)}.editor-footer-left,.editor-footer-right{justify-content:space-between}}.layout{display:flex;height:100vh;background:var(--color-bg-base);overflow:hidden}.layout-loading{display:flex;align-items:center;justify-content:center;height:100vh;background:var(--color-bg-base)}.spinner{width:32px;height:32px;border:3px solid var(--color-border-default);border-top-color:var(--color-accent);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.create-tag-form{display:flex;flex-direction:column;gap:var(--space-4)}.tag-color-picker{display:flex;gap:var(--space-2);flex-wrap:wrap}.tag-color-btn{width:24px;height:24px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:var(--transition-all)}.tag-color-btn:hover{transform:scale(1.1)}.tag-color-btn.selected{border-color:var(--color-text-primary)}.mobile-back-btn{display:none}@media(max-width:768px){.layout{flex-direction:column;position:relative}.layout .sidebar{position:fixed;top:0;left:0;bottom:0;width:280px;max-width:85vw;max-height:none;z-index:100;transform:translate(-100%);transition:transform .3s ease;border-right:1px solid var(--color-border-muted);box-shadow:var(--shadow-dropdown)}.layout.sidebar-open .sidebar{transform:translate(0)}.sidebar-overlay{display:none;position:fixed;inset:0;background:#00000080;z-index:99}.layout.sidebar-open .sidebar-overlay{display:block}.layout .notelist{width:100%;min-width:auto;max-width:none;flex:1;border-right:none}.layout .editor-container,.layout.mobile-editor .notelist{display:none}.layout.mobile-editor .editor-container{display:flex;flex:1}.mobile-back-btn{display:flex;position:fixed;top:var(--space-3);left:var(--space-3);z-index:50;padding:var(--space-2) var(--space-3);background:var(--color-bg-overlay);border:1px solid var(--color-border-default);border-radius:var(--radius-md);color:var(--color-text-primary);font-size:var(--text-sm);cursor:pointer;box-shadow:var(--shadow-dropdown)}.mobile-back-btn:hover{background:var(--color-bg-elevated)}.mobile-menu-btn{display:flex}}@media(min-width:769px){.mobile-menu-btn,.sidebar-overlay{display:none!important}}.toast-container{position:fixed;bottom:var(--space-6);right:var(--space-6);display:flex;flex-direction:column;gap:var(--space-2);z-index:2000;pointer-events:none}.toast{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--color-bg-overlay);border:1px solid var(--color-border-default);border-radius:var(--radius-lg);box-shadow:var(--shadow-toast);min-width:300px;max-width:420px;animation:slideInRight var(--duration-normal) var(--ease-out);pointer-events:auto}.toast.success{border-left:3px solid var(--color-success)}.toast.success .toast-icon{color:var(--color-success)}.toast.error{border-left:3px solid var(--color-error)}.toast.error .toast-icon{color:var(--color-error)}.toast.warning{border-left:3px solid var(--color-warning)}.toast.warning .toast-icon{color:var(--color-warning)}.toast.info{border-left:3px solid var(--color-info)}.toast.info .toast-icon{color:var(--color-info)}.toast-icon{flex-shrink:0;display:flex;align-items:center;justify-content:center}.toast-content{flex:1;min-width:0}.toast-title{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--color-text-primary)}.toast-message{font-size:var(--text-sm);color:var(--color-text-secondary);margin-top:var(--space-1)}.toast-dismiss{flex-shrink:0;padding:var(--space-1);color:var(--color-text-tertiary);cursor:pointer;background:none;border:none;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);transition:var(--transition-colors)}.toast-dismiss:hover{color:var(--color-text-primary);background:#ffffff0d}@keyframes slideInRight{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@media(max-width:768px){.toast-container{left:var(--space-4);right:var(--space-4);bottom:var(--space-4)}.toast{min-width:auto;max-width:none}}