/* Timer CSS */
        /*body {
            font-family: sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background: #f0f0f0;
        }*/
        #countdown {
            font-size: 3rem;
            font-weight: bold;
            color: #333;
            background: white;
            padding: 20px 40px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
       }
       .timer-container {
            text-align: center;
            background-color: white;
            padding: 30px;
            border-radius: 12px;
            margin-bottom: 50px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.5);
        }
        /* Timer CSS */
        /*body {
            font-family: sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background: #f0f0f0;
        }*/
        #countdown {
            font-size: 3rem;
            font-weight: bold;
            color: #333;
            background: white;
            padding: 20px 40px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
       }
       .timer-container {
            text-align: center;
            background-color: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.5);
        }
        
        
        
        
        /* Center the entire application layout on the screen */
        body { 
            font-family: sans-serif; 
            background: #f4f4f9; 
            margin: 0;
            padding: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            box-sizing: border-box;
        }
        .container {
            width: 100%;
            max-width: 450px; /* Restricts width so it looks crisp on desktop */
        }
        .header-container { 
            display: flex; 
            justify-content: space-between; 
            align-items: center; 
            margin-bottom: 20px; 
        }
        h2 { margin: 0; color: #333; }
        .clear-btn { 
            background-color: #ff4d4d; 
            color: white; 
            border: none; 
            padding: 8px 16px; 
            border-radius: 4px; 
            font-weight: bold; 
            cursor: pointer; 
            transition: background 0.2s; 
        }
        .clear-btn:hover { 
            background-color: #cc0000; 
        }
        .column { 
            background: white; 
            padding: 20px; 
            border-radius: 8px; 
            box-shadow: 0 4px 10px rgba(0,0,0,0.08); 
        }
        h3 {
            margin-top: 0; color: #555; border-bottom: 2px solid #eee; padding-bottom: 8px;
        }
        .todo-item { 
            display: flex; align-items: center; gap: 10px; margin: 15px 0;
        }
        input[type="text"] {
            flex: 1; padding: 8px; border: 1px solid #ccc; border-radius: 4px; font-size: 14px;
        }
        input[type="text"]:disabled {
            text-decoration: line-through; color: #888; border-color: transparent; background: none;
            }
        /* Audio */
        .audio-container {
            display: flex;
            justify-content: center;
            align-items: center;
            width: 100%;
            padding: 20px 0;
        }