* {
    margin: 0;
    padding: 0;
    font-family: 'Cambria', 'Cochin', 'Georgia', 'Times', 'Times New Roman', serif;
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #153677, #4e085f);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    padding: 30px 20px;
    margin: 20px;
    backdrop-filter: blur(10px);
}

.to-do-app {
    text-align: center;
}

.to-do-app h1 {
    color: #002765;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 2rem;
    font-weight: bold;
}

.to-do-app h1 img {
    width: 30px;
    margin-left: 10px;
}

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #edeef0;
    border-radius: 30px;
    padding: 10px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    padding: 10px;
    font-size: 16px;
}

button {
    width: 90px;
    height: 40px;
    border: none;
    border-radius: 20px;
    font-size: 16px;
    font-weight: bold;
    background-color: #ff5945;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

button:hover {
    background-color: #ff796a;
    transform: translateY(-2px);
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    font-size: 17px;
    padding: 12px 8px 12px 50px;
    user-select: none;
    cursor: pointer;
    position: relative;
    background: #f9f9f9;
    margin-bottom: 10px;
    border-radius: 10px;
    transition: background 0.3s, transform 0.3s;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

ul li:hover {
    background: #e0e0e0;
    transform: scale(1.02);
}

ul li::before {
    content: '';
    position: absolute;
    height: 28px;
    width: 28px;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    top: 50%;
    left: 10px;
    transform: translateY(-50%);
}

ul li.checked {
    text-decoration: line-through;
    color: #555;
}

ul li.checked::before {
    background-image: url('D:\Desktop\uncheck.png');
}

ul li::before {
    background-image: url('D:\Desktop\images\checked.png');
}

ul li span {
    color: #dc3545;
    font-size: 20px;
    margin-right: 10px;
    cursor: pointer;
    transition: color 0.3s;
}

ul li span:hover {
    color: #ff5945;
}

@media (max-width: 600px) {
    .row input {
        width: 60%;
        margin-right: 0.5rem;
    }

    .row button {
        padding: 0.5rem 0.5rem;
        font-size: 0.9rem;
    }

    li {
        font-size: 0.9rem;
    }
}