*,
*:before,
*:after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-san-serif);
    color: var(--color-black);
}

body {
    font-size: 16px;
    background: var(--color-yellow);
}

h1 {
    font-weight: 700;
    font-size: 2.4rem;
    line-height: 1.1;
}

@media (max-width: 600px) {
    h1 {
        font-size: 2rem;
    }
}

h2 {
    font-weight: 700;
    font-size: 4rem;
    line-height: 1;
}

@media (max-width: 600px) {
    h2 {
        font-size: 3rem;
    }
}

h3 {
    font-weight: 500; 
    font-size: 1.8rem;
    line-height: 1.2;
}

@media (max-width: 600px) {
    h3 {
        font-size: 1.6rem;
    }
}

.container {
    /* margin-left: auto;
    margin-right: auto;
    max-width: 1260px; */
    width: 100%;
    padding: 24px;
}


@media (max-width: 600px) {
    .container {
        padding-left: 36px;
        padding-right: 36px;
    }
}

.cover {
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    width: 100%;
    height: 100vh;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;
    grid-gap: 24px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    text-align: center;
    padding: 24px;
}

.-red.-red {
    color: var(--color-red);
}

.-teal.-teal {
    color: var(--color-teal);
}

#plus {
    color: var(--color-teal);
    animation: color_change 1.5s infinite alternate;
}