:root{--bg-primary: #F8FAFB;--bg-surface: #FFFFFF;--text-primary: #1A1A1A;--text-secondary: #666666;--accent: #607afb;--border: #E0E0E0;--hover: #F5F5F5;--completed-bg: #EEF1FF;--completed-text: #4C5FD5;--transition-speed: .3s;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}.dark{--bg-primary: #121212;--bg-surface: #1E1E1E;--text-primary: #E0E0E0;--text-secondary: #999999;--accent: #7B93FF;--border: #333333;--hover: #2A2A2A;--completed-bg: rgba(96, 122, 251, .15);--completed-text: #8FA5FF}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);transition:background-color var(--transition-speed) ease,color var(--transition-speed) ease}.app{min-height:100vh;background-color:var(--bg-primary);transition:background-color var(--transition-speed) ease}.header{background-color:var(--bg-surface);border-bottom:1px solid var(--border);padding:24px 48px;position:sticky;top:0;z-index:100;transition:all var(--transition-speed) ease}.header-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.logo-section{display:flex;align-items:center;gap:12px}.logo-icon{width:32px;height:32px;color:var(--accent)}.app-title{font-size:28px;font-weight:700;color:var(--text-primary);transition:color var(--transition-speed) ease}.header-actions{display:flex;align-items:center;gap:16px}.today-btn{display:flex;align-items:center;gap:8px;padding:8px 16px;background:transparent;border:1px solid var(--border);border-radius:8px;color:var(--text-secondary);font-size:14px;cursor:pointer;transition:all .2s ease;height:40px}.today-btn:hover{background-color:var(--hover);border-color:var(--accent);color:var(--accent)}.today-btn svg{width:16px;height:16px}.theme-toggle{padding:8px 16px;border-radius:8px;background:transparent;border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;font-size:14px;height:40px}.theme-toggle:hover{background-color:var(--hover);border-color:var(--accent);color:var(--accent);transform:scale(1.1)}.theme-toggle:active{transform:scale(.95)}.theme-icon{width:20px;height:20px;transition:transform .5s ease}.theme-icon.rotated{transform:rotate(360deg)}.main{padding:40px 0}.container{max-width:800px;margin:0 auto;padding:0 32px}.content-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}.section-title{font-size:32px;font-weight:700;color:var(--text-primary);transition:color var(--transition-speed) ease}.date-display{font-size:16px;font-weight:500;color:var(--accent)}.task-input-container{margin-bottom:24px}.task-input{width:100%;padding:16px 20px;font-size:16px;border:1px solid var(--border);border-radius:12px;background-color:var(--bg-surface);color:var(--text-primary);transition:all .3s cubic-bezier(.4,0,.2,1);font-family:var(--font-family)}.task-input:focus{outline:none;border:1px solid var(--border);background-color:var(--bg-primary);box-shadow:0 8px 24px #607afb1f,0 4px 8px #0000000f;transform:scale(1.01)}.task-input::placeholder{color:var(--text-secondary)}.task-stats{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;opacity:0;transition:opacity .3s ease}.task-stats.visible{opacity:1}.task-count{font-size:14px;color:var(--text-secondary);font-weight:500}.clear-completed{background:transparent;border:none;color:var(--text-secondary);font-size:14px;cursor:pointer;padding:4px 8px;border-radius:4px;transition:all .2s ease}.clear-completed:hover{color:var(--accent);background-color:var(--hover)}.task-list{display:flex;flex-direction:column;gap:12px;min-height:400px;position:relative}.task-item{display:flex;align-items:center;gap:16px;padding:16px 20px;background-color:var(--bg-surface);border:1px solid var(--border);border-radius:12px;cursor:grab;transition:all .3s ease;position:relative}.task-item:active{cursor:grabbing}.task-item.dragging{opacity:.4;cursor:grabbing}.task-item.drag-over:before{content:"";position:absolute;top:-6px;left:0;right:0;height:3px;background-color:var(--accent);border-radius:2px;box-shadow:0 0 8px #607afb66;z-index:10}.task-item:hover{background-color:var(--hover);transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.task-item.completed{background-color:var(--completed-bg);opacity:.8}.checkbox{width:24px;height:24px;border:2px solid var(--border);border-radius:6px;background:transparent;cursor:pointer;display:block;transition:all .3s ease;flex-shrink:0;position:relative}.checkbox:hover{border-color:var(--accent);transform:scale(1.1)}.checkbox.checked{background-color:var(--accent);border-color:var(--accent);transform:scale(1.1)}.checkbox.checked:hover{transform:scale(1.2)}.checkmark{width:16px;height:16px;color:#fff;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.task-text{flex:1;font-size:16px;color:var(--text-primary);transition:all .3s ease;word-break:break-word}.task-item.completed .task-text{text-decoration:line-through;color:var(--completed-text)}.delete-btn{width:32px;height:32px;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;border-radius:6px;display:flex;align-items:center;justify-content:center;opacity:0;transition:all .2s ease;flex-shrink:0}.task-item:hover .delete-btn{opacity:1}.delete-btn:hover{background-color:#f443361a;color:#f44336;transform:scale(1.1)}.delete-btn svg{width:16px;height:16px}.loading-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:var(--bg-primary);display:flex;align-items:center;justify-content:center;z-index:1000}.loading{display:flex;flex-direction:column;align-items:center;gap:16px}.loading-logo{width:60px;height:60px;color:var(--accent);animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.95)}}.loading-text{color:var(--text-secondary);font-size:14px;font-weight:500}.empty-state{text-align:center;padding:60px 20px;color:var(--text-secondary);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center}.lottie-animation{width:200px;height:200px;margin:0 auto 24px}.empty-state p{font-size:16px;margin:0}@media (max-width: 768px){.header{padding:16px 24px}.header-content{flex-direction:column;gap:16px;align-items:flex-start}.header-actions{width:100%;justify-content:space-between}.container{padding:0 24px}.content-header{flex-direction:column;align-items:flex-start;gap:8px}.section-title{font-size:28px}.task-item{padding:20px;min-height:48px}.task-input{padding:20px;font-size:18px}}@media (max-width: 480px){.header{padding:12px 16px}.container{padding:0 16px}.task-item,.task-input{padding:16px}}.checkbox:focus-visible,.delete-btn:focus-visible,.theme-toggle:focus-visible,.today-btn:focus-visible,.clear-completed:focus-visible{outline:2px solid var(--accent);outline-offset:2px}html{scroll-behavior:smooth}