:root {

    /* ### Primary */

--Teal500: hsl(179, 62%, 43%);
--Teal400: hsl(174, 48%, 60%);
--Green400: hsl(71, 73%, 54%);

    /* ### Neutral */

--Teal100: hsl(204, 43%, 93%);
--Gray500: hsl(218, 22%, 67%);

}

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

ul, li {
    list-style: none;
    opacity: 95%;
    line-height: 1.45;
}

h2 {
    font-size: 1.125rem;
}

h3,
p,
ul {
    color:hsl(0, 100%, 100%);
}

p, .month {
    font-weight: 400;
}

p {
    letter-spacing: -0.6px;
}

body {
    font-family: 'Karla', sans-serif;
    background-color: var(--Teal100);
}

.wrapper {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.main__container {
    max-width: 311px;
    border-radius: 0.5rem;
    overflow: hidden;
    margin: 1rem;
}

.first {
    background-color: hsl(0, 100%, 100%);
    padding: 2.5rem;
}

.first h1 {
    color: var(--Teal500);
    padding-block-end: 1.5rem;
}

.first h2 {
    color: var(--Green400);
    padding-block-end: 0.5rem;
}

.first p {
    color: var(--Gray500);
    line-height: 1.65;
}

.second {
    background-color: var(--Teal500);
    padding: 1.5rem 2.5rem;
}

.second h3 {
    padding-block-end: 1rem;
}

.second p {
    padding-block-start: 0.7rem;
}

.price {
    font-size: 2rem;
    font-weight: bold;
    margin-inline-end: 0.5rem;
    color:hsl(0, 100%, 100%);
}

.month {
    color: hsl(0, 100%, 100%);
    opacity: 50%;
}

.third {
    padding: 1.5rem 2.5rem;
    background-color: var(--Teal400);
}

.third h3 {
    padding-block-end: 1rem;
    letter-spacing: -0.25;
    font-size: 1.125rem;
}

button {
    border: none;
    width: 100%;
    padding: 1rem;
    font-weight: 600;
    font-size: 1rem;
    color: white;
    background-color: var(--Green400);
    margin-block-start: 2.5rem;
    border-radius: 0.5rem;
    box-shadow: 4px 4px 10px rgb(0, 0, 0, 0.2);
}

@media (min-width: 768px) {

    .main__container {
        max-width: 635px;
        display: grid;
        grid-template-areas: 
        "one one"
        "two three";
        margin: 0;
    }

    .first, .second, .third {
        padding: 2.5rem;
    }

    .first {
        grid-area: one;
    }

    .second {
        grid-area: two;    
    }

    .third {
        grid-area: three;
    }

    p {
    letter-spacing: 0;
    }
}