html {
    box-sizing: border-box;
}

*, ::after, ::before {
    box-sizing: inherit;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: #eee;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 50%;
    margin: 0 auto;
}

.container__header {
    align-self: flex-start;
    margin-bottom: 0;
}

.container__h2 {
    background-color: #fff;
    width: 100%;
    box-shadow: 1px 1px 3px 1px #ccc;
    padding: 20px;
    margin-bottom: 1px;
}

.container__form {
    display: flex;
    align-items: space-between;
    background-color: #fff;
    box-shadow: 1px 1px 3px 1px #ccc;
    width: 100%;
    padding: 20px;
}

@media (max-width: 767px) {
    .container {
        width: 100%;
    }
    .container__form {
        width: 100%;
    }
    .container__header {
        align-self: center;
    }
    .container__h2 {
        text-align: center;
    }
}

.form__input {
    flex-basis: 70%;
    margin-right: 10px;
    border: 2px solid #eee;
    padding: 10px;
}

.form__button {
    background-color: teal;
    color: #fff;
    flex-basis: 30%;
    border: none;
    transition: 0.3s;
}

@media (max-width: 767px) {
    .container__form {
        flex-wrap: wrap;
    }
    .form__input {
        flex-basis: 100%;
        margin-right: 0;
        margin-bottom: 5px;
    }
    .form__button {
        flex-basis: 100%;
        padding: 10px;
    }
}

.form__button:hover {
    background-color: hsl(180, 100%, 30%);
}

.container__tasks {
    align-self: flex-start;
    list-style: none;
    padding: 0;
    background-color: #fff;
    width: 100%;
    box-shadow: 1px 1px 3px 1px #ccc;
    margin: 0;
}

.container__tasks__done {
    width: 30px;
    height: 30px;
    background-color: hsl(120, 100%, 25%);
    font-weight: bold;
    margin-right: 5px;
    padding: 5px;
    border: none;
    transition: 0.3s;
}

.container__tasks__done:hover {
    background-color: hsl(120, 100%, 30%);
}

.container__tasks__remove {
    width: 30px;
    height: 30px;
    background-color: hsl(0, 100%, 40%);
    font-weight: bold;
    margin-right: 5px;
    padding: 5px;
    border: none;
    transition: 0.3s;
}

.container__tasks__remove:hover {
    background-color: hsl(0, 100%, 50%);
}

.tasks__item {
    background-color: #fff;
    padding: 10px 10px 0 10px;
    display: flex;
    align-items: center;
    border-bottom: 2px solid #eee;
    margin-bottom: 5px;
}

.tasks__item--hidden {
    display: none;
}

.line {
    width: 95%;
    border: 1px solid #eee;
    margin: 10px;
}

.buttons__container {
    display: flex;
    width: 50%;
    margin: 20px auto 0 auto;
    background-color: #fff;
    box-shadow: 1px 1px 3px 1px #ccc;
}

.buttons__container__header {
    display: flex;
    flex-basis: 100%;
    flex-wrap: wrap;
}

.buttons {
    flex-basis: 70%;
    display: flex;
    justify-content: flex-end;
}

.hideButton {
    background: transparent;
    color: teal;
    border: none;
    margin: 0 20px 0 0;
    transition: color 0.3s;
}

.hideButton:hover {
    color: hsl(180, 100%, 30%);
}

.allDone {
    background: white;
    color: teal;
    border: none;
    transition: color 0.3s;
}

.allDone:disabled {
    color: #ccc;
}

.allDone:hover {
    color: hsl(180, 100%, 30%);
}

.buttons__container__h2 {
    background-color: #fff;
    padding: 20px;
    margin-bottom: 1px;
    margin-top: 0;
}

@media (max-width: 767px) {
    .buttons__container {
        width: 100%;
    }
    .buttons {
        flex-basis: 100%;
        flex-wrap: wrap;
        justify-content: center;
        margin-bottom: 10px;
    }
    .buttons__container__h2 {
        flex-basis: 100%;
        text-align: center;
    }
    .hideButton {
        flex-basis: 100%;
        margin: 0 0 10px 0;
    }
    .allDone {
        flex-basis: 100%;
        margin: 0 0 10px 0;
    }
}