:root {
    --primary-color: #2b7ef4;
    --secondary-color: #2b7ff4ab;
    --tertiary-color: #982a35;
    --quaternary-color: #fff;
    --quinary-color: #000;
    --senary-color: #1d1d1d;
    --setenary-color: #5799f5;
    --octonary-color: #006aff;

    --primary-button-color: #2b7ef4;
    --secondary-button-color: #2868c2;
    --tertiary-button-color: #00f279;
    --quaternary-button-color: #1e90ff;
    --quinary-button-color: #cacaca;

    --white: #fff;
    --black: #000;

    --primary-button-limpar-color: #ffff00;
    --secondary-button-limpar-color: #ffa500;
    --primary-button-espaco-color: #1e90ff;
    --secondary-button-espaco-color: #246bb3;
    --primary-button-backspace-color: #9c9c9c;
    --secondary-button-backspace-color: #5a5656;
    --back-keyboard-color: #696b6d;
    --tooltip: #fcdd56ef;

    font-size: 62.5%;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}
body {
    display: flex;
    flex-direction: column;
}

.container {
    display: block;
    min-height: 60vh;
}

li {
    list-style-type: none;
}

h2 {
    font-size: 2.8rem;
    margin: 2rem 0;
}

h3 {
    font-size: 2.2rem;
}

h4 {
    font-size: 1.6rem;
}

a {
    font-size: 2.2rem !important;
}

p {
    font-size: 1.8rem;
    line-height: 4rem;
}

button {
    margin-top: 5rem;
    font-size: 2rem !important;
    padding: 1rem 2rem !important;
}

.button-color {
    background-color: var(--primary-button-color);
    color: var(--black);
}

.button-color:active {
    background-color: var(--secondary-button-color) !important;
    color: var(--white) !important;
    border: 1px solid var(--black);
}

.term {
    padding: 0.3rem 0.5rem;
    margin: 0;
    font-size: 1.6rem;
}

.hidden-area {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

@media (hover: hover) {
    .button-color:hover {
        background-color: var(--secondary-button-color);
        color: var(--white);
    }
}

@media (max-width: 573px) {
    .container {
        padding: 0 2rem 0 2rem;
    }
    h2 {
        line-height: 4rem;
        text-align: center;
    }

    p {
        line-height: 3.7rem;
        text-align: justify;
    }

    h3 {
        line-height: 4rem;
    }
}

@media (max-width: 450px) {
    header h2 {
        font-size: 2.3rem;
        line-height: 3.5rem;
    }
}