css.css

body {
    margin: 0;
}

.nav-todo {
    width: 100%;
    height: 5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0px 0px 6px 2px #504d4d;
    background-color: #9ca0f8;
}

.title {
    font-size: 3rem;
    margin-left: 3rem;
}

.nav-todo-add-btn {
    background-color: blue;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 3rem;
    height: 3rem;
    border-radius: 1.5rem;
    margin-right: 3rem;
    cursor: pointer;
}

.nav-todo-add-btn span {
    color: #ffffff;
    font-size: 3rem;
}

.list-cards {
    width: 100%;
    display: flex;
    justify-content: center;
    background-color: #dbddf3;
}

.list-cards-container {
    width: 70%;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 5rem;
}

.card {
    margin-top: 2rem;
    width: 20rem;
    height: 20rem;
    border-radius: 1rem;
    box-shadow: 0 4px 8px 0 rgba(39, 93, 135, 0.2);
    display: flex;
    overflow: hidden;
    flex-direction: column;
    align-items: center;
    background-color: #b1b4ee;
}

.card-head {
    width: 100%;
    display: flex;
    justify-content: space-between;
    height: 4rem;
    align-items: center;
    background-color: #7c81ff;
}

.card-head img {
    width: 2rem;
    height: 2rem;
    cursor: pointer;
    margin-right: 1rem;
    border-radius: .5rem;
}

.card-head span {
    font-size: 1.3rem;
    font-weight: bold;
    margin-left: 1rem;
}

.card-content {
    margin-top: 3rem;
    width: 80%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.card-content span {
    text-align: justify;
}

.popup-container {
    width: 100%;
    height: 95vh;
    top: 5rem;
    left: 0;
    position: absolute;
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 20;
    background-color: transparent;
}

.popup {
    width: 30rem;
    height: 30rem;
    border-radius: 1rem;
    background-color: #d7caca;
    box-shadow: 0 4px 8px 0 rgba(39, 93, 135, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-around;
}

.popup-title {
    font-size: 2rem;
}

.popup input {
    width: 70%;
    height: 2rem;
    outline: none;
    border-radius: .3rem;
}

.popup textarea {
    width: 70%;
    border-radius: .3rem;
}

.actions {
    width: 70%;
    display: flex;
    justify-content: space-between;
}

.create {
    width: 10rem;
    height: 2rem;
    border-radius: .5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ffffff;
    cursor: pointer;
}

.cancel {
    width: 10rem;
    height: 2rem;
    border-radius: .5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ffffff;
    cursor: pointer;
}

.cancel, .create {
    font-weight: bold;
    font-size: 1rem;
}