* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
     background: linear-gradient(135deg, #667eea, #764ba2);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2rem;
    align-items: center;
    padding: 3rem 1rem;
    color: #fff;
}


.continer {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1); 
    backdrop-filter: blur(8px);           
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 600px;
}

h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
    font-weight: bold;
    color: #fff;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.3);
}

.upper {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.upper input[type="text"] {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 10px;
    width: 280px;
    font-size: 1rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.upper input[type="text"]:focus {
    outline: none;
    border: 2px solid #ffcf33;
}

#btn1 {
    padding: 0.75rem 1.2rem;
    background: linear-gradient(to right, #ff512f, #dd2476);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

#btn1:hover {
    transform: scale(1.05);
    background: linear-gradient(to right, #dd2476, #ff512f);
}

.task {
    background: #fff;
    color: #333;
    width: 100%;
    max-width: 500px;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    margin-top: 1rem;
}

.task div {
    background: #f5f5f5;
    margin: 0.6rem 0;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.todo-list-elem {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    max-width: 600px;
    margin-top: 1rem;
}

.main-todo-list {
    background-color: rgba(255, 255, 255, 0.9);
    color: #333;
    padding: 1rem;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.main-todo-list:hover {
    transform: scale(1.02);
}

.main-todo-list li {
    list-style: none;
    font-size: 1.1rem;
    font-weight: 500;
}

.deletebtn {
    background: linear-gradient(to right, #ff6a00, #ee0979);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.deletebtn:hover {
    background: linear-gradient(to right, #ee0979, #ff6a00);
    transform: scale(1.05);
}