:root{--bg-color: #f3f4f6;--text-color: #1f2937;--primary-color: #2563eb;--secondary-color: #ffffff;--accent-color: #3b82f6;--danger-color: #ef4444;--success-color: #10b981;--border-color: #e5e7eb;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--font-family: "Inter", system-ui, -apple-system, sans-serif;--section-today: #3b82f6;--section-week: #8b5cf6;--section-month: #10b981;--section-year: #f59e0b}html.dark{--bg-color: #111827;--text-color: #f9fafb;--primary-color: #60a5fa;--secondary-color: #1f2937;--accent-color: #93c5fd;--border-color: #374151;--section-today: #60a5fa;--section-week: #a78bfa;--section-month: #34d399;--section-year: #fbbf24}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-color);line-height:1.5;min-height:100vh;padding:2rem;transition:background-color .3s,color .3s;background-image:url(/logo.png);background-repeat:no-repeat;background-position:center;background-size:500px;background-attachment:fixed}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:var(--bg-color);opacity:.97;z-index:-1}main{width:100%;max-width:1400px;margin:0 auto}header{margin-bottom:2rem;text-align:center;position:relative}h1{font-size:2.5rem;font-weight:800;margin-bottom:.5rem;background:linear-gradient(to right,var(--primary-color),var(--section-week));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.controls{margin-bottom:2rem;max-width:700px;margin-left:auto;margin-right:auto;display:flex;gap:1rem;align-items:center}.input-group{display:flex;gap:.5rem;background:var(--secondary-color);padding:.5rem;border-radius:12px;box-shadow:var(--shadow);border:1px solid var(--border-color);align-items:center;flex:1}select#category-select{padding:.75rem;border:none;background:transparent;color:var(--text-color);font-size:1rem;cursor:pointer;border-right:1px solid var(--border-color);outline:none}input[type=text]{flex:1;padding:.75rem 1rem;border:none;background:transparent;font-size:1rem;color:var(--text-color);outline:none;min-width:0}.private-check{display:flex;align-items:center;padding:0 .5rem}.private-check input{display:none}.private-check label{cursor:pointer;color:var(--text-color);opacity:.5;transition:all .2s;padding:.5rem}.private-check input:checked+label{opacity:1;color:var(--primary-color)}button#add-btn{background-color:var(--primary-color);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;font-weight:600;cursor:pointer;transition:opacity .2s;flex-shrink:0}button#add-btn:hover{opacity:.9}.top-nav{position:absolute;top:1rem;right:1rem;display:flex;gap:.5rem;flex-wrap:wrap;justify-content:flex-end}.top-nav button{background:var(--secondary-color);border:1px solid var(--border-color);padding:0;border-radius:50%;cursor:pointer;color:var(--text-color);width:40px;height:40px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);transition:transform .1s}.top-nav button:active{transform:scale(.95)}.grid-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.section-card{background:var(--secondary-color);padding:1.5rem;border-radius:16px;box-shadow:var(--shadow);border:1px solid var(--border-color);display:flex;flex-direction:column}.section-card h2{font-size:1.5rem;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid transparent;text-transform:capitalize}.today h2{border-color:var(--section-today);color:var(--section-today)}.week h2{border-color:var(--section-week);color:var(--section-week)}.month h2{border-color:var(--section-month);color:var(--section-month)}.year h2{border-color:var(--section-year);color:var(--section-year)}ul{list-style:none;flex:1;overflow-y:auto;min-height:200px;padding:.5rem}ul.drag-over{background-color:#00000005;border-radius:8px;box-shadow:inset 0 0 0 2px var(--primary-color)}html.dark ul.drag-over{background-color:#ffffff05}li{background:var(--bg-color);margin-bottom:.75rem;padding:.75rem .5rem;border-radius:8px;display:flex;justify-content:space-between;align-items:center;border:1px solid var(--border-color);animation:slideIn .3s ease-out;cursor:grab;user-select:none;gap:.5rem}li.dragging{opacity:.5;cursor:grabbing}.item-content{font-size:1rem;word-break:break-word;flex:1}.item-content.masked{filter:blur(4px);user-select:none}.masked-text{font-family:monospace;letter-spacing:2px}.lock-icon{opacity:.6;width:14px;height:14px}.check-btn{background:transparent;border:1px solid var(--border-color);color:var(--text-color);width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s;padding:0;flex-shrink:0}.check-btn:hover{border-color:var(--success-color);color:var(--success-color)}.delete-btn{background:transparent;color:var(--danger-color);border:none;padding:.5rem;cursor:pointer;opacity:.5;transition:opacity .2s;font-size:1.5rem;line-height:1;flex-shrink:0}.delete-btn:hover{opacity:1}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000;backdrop-filter:blur(4px);padding:1rem}.modal-content{background:var(--secondary-color);padding:1.5rem;border-radius:16px;width:100%;max-width:600px;max-height:85vh;display:flex;flex-direction:column;box-shadow:var(--shadow);border:1px solid var(--border-color)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.close-btn{background:transparent;border:none;font-size:2rem;cursor:pointer;color:var(--text-color);line-height:1;padding:.5rem}#completed-list{overflow-y:auto}#completed-list li{opacity:.8}#completed-list .item-content{text-decoration:line-through;color:var(--text-color);opacity:.7}#completed-list .check-btn{background:var(--success-color);color:#fff;border-color:var(--success-color)}.help-text{overflow-y:auto;font-size:.95rem}.help-text h3{margin-top:1rem;margin-bottom:.5rem;color:var(--primary-color);font-weight:600}.help-text ul{list-style:disc;padding-left:1.5rem;margin-bottom:1rem;color:var(--text-color);opacity:.9}.help-text li{background:transparent;border:none;padding:.25rem 0;margin-bottom:.25rem;display:list-item;animation:none}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){body{padding:1rem .5rem}.grid-container{grid-template-columns:1fr}.top-nav{position:relative;top:0;right:0;justify-content:flex-end;margin-bottom:1rem;padding:0 .5rem}.controls{flex-direction:column;padding:0 .5rem}.input-group{width:100%;flex-wrap:wrap}.section-card{margin-bottom:1rem}}