:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--primary-color: #646cff;--text-color: #2c3e50;--bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--glass-bg: rgba(255, 255, 255, .25);--glass-border: rgba(255, 255, 255, .3);--glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, .37)}*{box-sizing:border-box}body{margin:0;display:flex;place-items:center;justify-content:center;min-width:320px;min-height:100vh;background:var(--bg-gradient);color:var(--text-color);overflow:hidden}.app-container{width:100%;max-width:500px;padding:2rem;display:flex;flex-direction:column;align-items:center;height:100vh;justify-content:center}.glass-card{background:var(--glass-bg);box-shadow:var(--glass-shadow);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-radius:20px;border:1px solid var(--glass-border);width:100%;padding:2rem;display:flex;flex-direction:column;max-height:80vh;animation:fadeIn .6s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.app-header{margin-bottom:2rem;display:flex;justify-content:space-between;align-items:baseline}.app-header h1{margin:0;font-size:1.8rem;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.1)}.task-count{color:#fffc;font-size:.9rem}.todo-input-container{display:flex;gap:10px;margin-bottom:2rem}.todo-input{flex:1;padding:12px 16px;border-radius:12px;border:none;background:#fff9;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);font-size:1rem;color:#333;outline:none;transition:all .3s ease;box-shadow:0 2px 10px #0000001a}.todo-input::placeholder{color:#0006}.todo-input:focus{background:#ffffffe6;box-shadow:0 4px 15px #00000026;transform:translateY(-1px)}.add-button{background:#fff;border:none;border-radius:12px;width:48px;height:48px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#667eea;transition:all .3s ease;box-shadow:0 2px 10px #0000001a}.add-button:hover:not(:disabled){transform:translateY(-2px) scale(1.05);box-shadow:0 4px 15px #0003}.add-button:disabled{opacity:.5;cursor:not-allowed}.todo-list{flex:1;overflow-y:auto;margin-right:-10px;padding-right:10px;display:flex;flex-direction:column;gap:12px}.todo-list::-webkit-scrollbar{width:6px}.todo-list::-webkit-scrollbar-track{background:transparent}.todo-list::-webkit-scrollbar-thumb{background:#ffffff4d;border-radius:3px}.todo-list::-webkit-scrollbar-thumb:hover{background:#ffffff80}.todo-item{background:#fff9;padding:12px 16px;border-radius:12px;display:flex;align-items:center;gap:12px;transition:all .3s ease;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}.todo-item:hover{background:#ffffffd9;transform:translate(4px)}.todo-item.completed{opacity:.7;background:#ffffff4d}.todo-item.completed .todo-text{text-decoration:line-through;color:#666}.todo-text{flex:1;font-size:1rem;word-break:break-all;transition:all .2s}.checkbox-container{position:relative;width:20px;height:20px;cursor:pointer}.checkbox-container input{opacity:0;cursor:pointer;height:0;width:0}.checkmark{position:absolute;top:0;left:0;height:20px;width:20px;background-color:#ffffff80;border:2px solid #667eea;border-radius:6px;transition:all .2s}.checkbox-container:hover input~.checkmark{background-color:#fffc}.checkbox-container input:checked~.checkmark{background-color:#667eea}.checkmark:after{content:"";position:absolute;display:none}.checkbox-container input:checked~.checkmark:after{display:block}.checkbox-container .checkmark:after{left:5px;top:1px;width:4px;height:10px;border:solid white;border-width:0 2px 2px 0;transform:rotate(45deg)}.delete-button{background:transparent;border:none;color:#ff6b6b;cursor:pointer;opacity:0;transition:all .2s;padding:4px;border-radius:4px;display:flex}.todo-item:hover .delete-button{opacity:1}.delete-button:hover{background:#ff6b6b1a;transform:scale(1.1)}.empty-state{text-align:center;color:#fffc;font-style:italic;margin-top:2rem}.app-footer{margin-top:1.5rem;color:#fff9;font-size:.8rem}