body {
    margin: 0;
    padding: 0;
    font-family: 'Courier New', Courier, monospace; 
    background-color: #d6e0f0;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

div {
    width: 90%;
    max-width: 450px;
    margin: 50px auto;
    background: #ffffff;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
}

h1 {
    font-size: 28px;
    margin-bottom: 25px;
    color: #0077b6; 
    text-transform: uppercase; 
    letter-spacing: 2px;
}

.input-container {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

input[type="text"] {
    width: 70%;
    padding: 12px;
    border: 2px solid #90e0ef;
    outline: none;
    font-size: 15px;
    transition: 0.3s;
}

input[type="text"]:focus {
    border-color: #0077b6;
}
 
#botao {
    padding: 10px 15px;
    margin: 5px;
    margin-left: 10px;
    background: #0077b6;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 12px;
    cursor:pointer;
    transition: 0.3s;
}

#botao:hover {
    background-color: #023e8a;
}

#tarefas {
    margin-top: 25px;
    text-align: left;
    list-style: none;
    padding: 0;
}

.tarefa {
    cursor: pointer;
    padding: 8px 5px;
    transition: 0.3s;
}

.tarefa:hover {
    background-color: #f1f1f1;
    border-radius: 5px;
}

.concluida {
    text-decoration: line-through; 
    color: black; 
    opacity: 0.8;
}