* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    padding: 20px;
    background-color: black;
    background-image: url('tick.png');
    background-size: contain;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    min-height: 100vh;
}

.main-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.columns-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

.top-row {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.bottom-row {
    display: flex;
    justify-content: center;
}

.bottom-row .container {
    max-width: 600px;
}

.container {
    flex: 1;
    max-width: 400px;
    background-color: rgba(255, 255, 255, 0.6);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(2px);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #000;
    text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.5);
}

.input-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    background-color: rgba(255, 255, 255, 0.8);
}

button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #45a049;
}

ul {
    list-style: none;
}

li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    margin-bottom: 5px;
    background-color: rgba(249, 249, 249, 0.7);
    border-radius: 4px;
    gap: 10px;
}

li button {
    background-color: #ff4444;
    padding: 5px 10px;
}

li button:hover {
    background-color: #cc0000;
}

.completed {
    text-decoration: line-through;
    color: #888;
}

.task-container {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.task-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .top-row {
        flex-direction: column;
    }
    
    .container {
        max-width: 600px;
        margin: 0 auto 20px auto;
    }
}

.title {
    font-family: 'Orbitron', sans-serif;
    text-align: center;
    margin-bottom: 30px;
    font-size: 3.5rem;
    color: white;
    letter-spacing: 3px;
    text-shadow: 
        -2px -2px 0 #000,  
         2px -2px 0 #000,
        -2px  2px 0 #000,
         2px  2px 0 #000;
}