:root{--bg-primary: #f8fafc;--bg-secondary: #f1f5f9;--bg-surface: #ffffff;--bg-surface-hover: #f8fafc;--bg-glass: rgba(255, 255, 255, .7);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--border-color: #e2e8f0;--border-light: #f1f5f9;--primary: #6366f1;--primary-light: #818cf8;--primary-dark: #4f46e5;--primary-glow: rgba(99, 102, 241, .3);--accent: #f472b6;--accent-light: #f9a8d4;--accent-glow: rgba(244, 114, 182, .3);--success: #22c55e;--success-light: #86efac;--success-bg: rgba(34, 197, 94, .1);--warning: #f59e0b;--warning-light: #fcd34d;--warning-bg: rgba(245, 158, 11, .1);--danger: #ef4444;--danger-light: #fca5a5;--danger-bg: rgba(239, 68, 68, .1);--priority-high: #ef4444;--priority-medium: #f59e0b;--priority-low: #22c55e;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--shadow-glow: 0 0 30px var(--primary-glow);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .35s ease;--sidebar-width: 280px}[data-theme=dark]{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-surface: #1e293b;--bg-surface-hover: #334155;--bg-glass: rgba(30, 41, 59, .8);--text-primary: #f8fafc;--text-secondary: #cbd5e1;--text-muted: #64748b;--border-color: #334155;--border-light: #1e293b;--primary: #818cf8;--primary-light: #a5b4fc;--primary-dark: #6366f1;--shadow-sm: 0 1px 2px 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, .5), 0 4px 6px -4px rgba(0, 0, 0, .4)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;transition:background-color var(--transition-base),color var(--transition-base)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;color:var(--text-primary)}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.125rem}p{color:var(--text-secondary)}.app-container{display:flex;min-height:100vh}.main-content{flex:1;margin-left:var(--sidebar-width);padding:var(--spacing-xl);max-width:calc(100vw - var(--sidebar-width));overflow-x:hidden}.sidebar{position:fixed;left:0;top:0;width:var(--sidebar-width);height:100vh;background:var(--bg-surface);border-right:1px solid var(--border-color);display:flex;flex-direction:column;padding:var(--spacing-lg);z-index:100;transition:background-color var(--transition-base),border-color var(--transition-base);overflow-y:auto}.sidebar-logo{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);margin-bottom:var(--spacing-lg)}.sidebar-logo h1{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.sidebar-logo svg{color:var(--primary)}.sidebar-nav{flex:1;display:flex;flex-direction:column;gap:var(--spacing-xs)}.nav-item{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-lg);color:var(--text-secondary);text-decoration:none;font-weight:500;cursor:pointer;transition:all var(--transition-fast);border:none;background:transparent;width:100%;text-align:left;font-size:.95rem}.nav-item:hover{background:var(--bg-surface-hover);color:var(--text-primary)}.nav-item.active{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:var(--shadow-glow)}.nav-item svg{width:20px;height:20px}.nav-item .badge{margin-left:auto;background:var(--danger);color:#fff;font-size:.75rem;padding:.125rem .5rem;border-radius:var(--radius-full);font-weight:600}.card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);transition:all var(--transition-base)}.card:hover{box-shadow:var(--shadow-md)}.card-glass{background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.2)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);font-weight:500;font-size:.95rem;cursor:pointer;transition:all var(--transition-fast);border:none;text-decoration:none}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-glow)}.btn-secondary{background:var(--bg-surface);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background:var(--bg-surface-hover);border-color:var(--primary)}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{background:var(--bg-surface-hover);color:var(--text-primary)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:var(--danger-light)}.btn-icon{width:36px;height:36px;padding:0;border-radius:var(--radius-md)}.input{width:100%;padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-surface);color:var(--text-primary);font-size:1rem;transition:all var(--transition-fast)}.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.input::placeholder{color:var(--text-muted)}.priority-badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;text-transform:uppercase}.priority-high{background:var(--danger-bg);color:var(--priority-high)}.priority-medium{background:var(--warning-bg);color:var(--priority-medium)}.priority-low{background:var(--success-bg);color:var(--priority-low)}.task-card{display:flex;align-items:flex-start;gap:var(--spacing-md);padding:var(--spacing-md);background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast)}.task-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translate(4px)}.task-card.completed{opacity:.6}.task-card.completed .task-title{text-decoration:line-through;color:var(--text-muted)}.task-checkbox{width:22px;height:22px;border:2px solid var(--border-color);border-radius:var(--radius-sm);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);flex-shrink:0;margin-top:2px}.task-checkbox:hover{border-color:var(--primary)}.task-checkbox.checked{background:linear-gradient(135deg,var(--primary),var(--accent));border-color:transparent}.task-checkbox.checked svg{color:#fff}.task-content{flex:1;min-width:0}.task-title{font-weight:500;color:var(--text-primary);margin-bottom:var(--spacing-xs)}.task-meta{display:flex;align-items:center;gap:var(--spacing-sm);font-size:.85rem;color:var(--text-muted)}.task-meta svg{width:14px;height:14px}.task-actions{display:flex;gap:var(--spacing-xs);opacity:0;transition:opacity var(--transition-fast)}.task-card:hover .task-actions{opacity:1}.quick-add-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:flex-start;justify-content:center;padding-top:15vh;z-index:1000;animation:fadeIn var(--transition-fast)}.quick-add-modal{width:100%;max-width:560px;background:var(--bg-surface);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);overflow:hidden;animation:slideDown var(--transition-base)}.quick-add-input{width:100%;padding:var(--spacing-lg);border:none;background:transparent;color:var(--text-primary);font-size:1.125rem;outline:none}.quick-add-input::placeholder{color:var(--text-muted)}.quick-add-hints{padding:var(--spacing-md) var(--spacing-lg);border-top:1px solid var(--border-color);background:var(--bg-secondary)}.quick-add-hints p{font-size:.8rem;color:var(--text-muted)}.quick-add-hints kbd{display:inline-block;padding:2px 6px;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.75rem;font-family:monospace;margin:0 2px}.focus-mode{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg-primary);z-index:2000;display:flex;flex-direction:column;align-items:center;justify-content:center;animation:fadeIn var(--transition-base)}.focus-mode-content{text-align:center;max-width:600px;padding:var(--spacing-2xl)}.focus-mode-timer{font-size:5rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--spacing-lg);font-variant-numeric:tabular-nums}.focus-mode-task{font-size:1.5rem;color:var(--text-primary);margin-bottom:var(--spacing-sm)}.focus-mode-meta{color:var(--text-muted);margin-bottom:var(--spacing-2xl)}.focus-mode-controls{display:flex;gap:var(--spacing-md);justify-content:center}.focus-mode-exit{position:absolute;top:var(--spacing-lg);right:var(--spacing-lg)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.stat-card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-lg);text-align:center;transition:all var(--transition-fast)}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.stat-icon{width:48px;height:48px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;margin:0 auto var(--spacing-md)}.stat-icon.primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff}.stat-icon.success{background:linear-gradient(135deg,var(--success),#16a34a);color:#fff}.stat-icon.warning{background:linear-gradient(135deg,var(--warning),#d97706);color:#fff}.stat-icon.accent{background:linear-gradient(135deg,var(--accent),#ec4899);color:#fff}.stat-value{font-size:2rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--spacing-xs)}.stat-label{font-size:.875rem;color:var(--text-muted)}.xp-bar-container{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.xp-bar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md)}.xp-level{display:flex;align-items:center;gap:var(--spacing-sm)}.xp-level-badge{width:40px;height:40px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.125rem}.xp-bar{height:12px;background:var(--bg-secondary);border-radius:var(--radius-full);overflow:hidden}.xp-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:var(--radius-full);transition:width var(--transition-slow)}.streak-display{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:linear-gradient(135deg,var(--warning-bg),transparent);border:1px solid var(--warning);border-radius:var(--radius-lg)}.streak-display svg{color:var(--warning)}.streak-count{font-weight:700;color:var(--warning)}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-xl)}.page-title{font-size:1.75rem;font-weight:700}.page-subtitle{color:var(--text-muted);margin-top:var(--spacing-xs)}.theme-toggle{width:44px;height:44px;border-radius:var(--radius-lg);background:var(--bg-surface);border:1px solid var(--border-color);cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:all var(--transition-fast)}.theme-toggle:hover{border-color:var(--primary);color:var(--primary)}.empty-state{text-align:center;padding:var(--spacing-2xl);color:var(--text-muted)}.empty-state svg{width:64px;height:64px;margin-bottom:var(--spacing-md);opacity:.5}.empty-state h3{color:var(--text-secondary);margin-bottom:var(--spacing-sm)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@media (max-width: 768px){:root{--sidebar-width: 0px}.sidebar{transform:translate(-100%)}.main-content{margin-left:0;max-width:100vw;padding:var(--spacing-md)}}