:root{--primary: #6366f1;--primary-hover: #4f46e5;--secondary: #a855f7;--bg-color: #f8fafc;--card-bg: #ffffff;--text-main: #1e293b;--text-muted: #64748b;--border-color: #e2e8f0;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--danger: #ef4444;--success: #22c55e;--warning: #f59e0b;--radius: 12px;--transition: all .3s ease;--gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%)}[data-theme=dark]{--primary: #818cf8;--primary-hover: #6366f1;--secondary: #c084fc;--bg-color: #0f172a;--card-bg: #1e293b;--text-main: #f1f5f9;--text-muted: #94a3b8;--border-color: #334155;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .5);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .5), 0 2px 4px -2px rgb(0 0 0 / .5)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-main);transition:background-color .3s ease,color .3s ease;min-height:100vh;padding:2rem 1rem}#root{max-width:800px;margin:0 auto;padding:0 1rem}h1{font-size:2.5rem;font-weight:800;background:var(--gradient);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.5rem}h2{font-size:1.5rem;font-weight:600;margin-bottom:1rem}.app-container{display:flex;flex-direction:column;gap:2rem}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.card{background-color:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:1.5rem;border:1px solid var(--border-color);transition:var(--transition)}.input-group{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:1rem}@media(max-width:600px){.input-group{grid-template-columns:1fr}}input,select{width:100%;padding:.75rem 1rem;border-radius:var(--radius);border:1px solid var(--border-color);background-color:var(--bg-color);color:var(--text-main);font-size:1rem;transition:var(--transition)}input:focus,select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #6366f133}.btn{padding:.75rem 1.5rem;border-radius:var(--radius);border:none;font-weight:600;cursor:pointer;transition:var(--transition);display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.btn-primary{background:var(--gradient);color:#fff}.btn-primary:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 12px #6366f14d}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:1.5rem}.stat-card{background-color:var(--card-bg);background:#ffffff80;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1rem;border-radius:var(--radius);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;align-items:center;justify-content:center;transition:var(--transition)}[data-theme=dark] .stat-card{background:#1e293b80}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--primary)}.stat-value{font-size:1.5rem;font-weight:800;color:var(--text-main);line-height:1.2}.stat-label{font-size:.875rem;color:var(--text-muted);font-weight:500}.text-success{color:var(--success)}.text-warning{color:var(--warning)}.text-primary{color:var(--primary)}@media(max-width:600px){.stats-grid{grid-template-columns:repeat(2,1fr)}}.btn-danger{background-color:transparent;color:var(--danger);padding:.5rem}.btn-danger:hover{background-color:#ef44441a}.btn-icon{background:transparent;border:1px solid var(--border-color);color:var(--text-main);padding:.5rem;border-radius:50%}.btn-icon:hover{background-color:var(--border-color)}.task-list{display:flex;flex-direction:column;gap:1rem}.task-item{display:flex;align-items:center;justify-content:space-between;background-color:var(--card-bg);padding:1rem;border-radius:var(--radius);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);transition:var(--transition);animation:slideUp .3s ease-out forwards}.task-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.task-item.completed{opacity:.6}.task-item.completed .task-title{text-decoration:line-through;color:var(--text-muted)}.task-item.overdue{border-left:4px solid var(--danger)}.task-info{flex:1}.task-title{font-weight:600;margin-bottom:.25rem}.task-meta{display:flex;gap:1rem;font-size:.875rem;color:var(--text-muted)}.badge{padding:.25rem .5rem;border-radius:999px;font-size:.75rem;font-weight:600;text-transform:uppercase}.badge-high{background-color:#ef44441a;color:var(--danger)}.badge-medium{background-color:#f59e0b1a;color:var(--warning)}.badge-low{background-color:#22c55e1a;color:var(--success)}.progress-container{height:.75rem;background-color:var(--border-color);border-radius:999px;overflow:hidden;margin-top:1rem}.progress-fill{height:100%;background:var(--gradient);transition:width .5s cubic-bezier(.4,0,.2,1)}.custom-checkbox{appearance:none;width:1.5rem;height:1.5rem;border:2px solid var(--border-color);border-radius:50%;margin-right:1rem;cursor:pointer;position:relative;transition:var(--transition)}.custom-checkbox:checked{background-color:var(--primary);border-color:var(--primary)}.custom-checkbox:checked:after{content:"✓";position:absolute;color:#fff;font-size:1rem;top:50%;left:50%;transform:translate(-50%,-50%)}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.empty-state{text-align:center;padding:3rem;color:var(--text-muted)}