* {
    box-sizing: border-box;
}

:root {
    --header-height: max(75px, 10vh);
    --logo-border-radius: calc(var(--header-height) / 2.8);
  }

@media (prefers-reduced-motion: no-preference) {
    * {
        scroll-behavior: smooth;
    }
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 16px;
    background-color: #F4F9FF;
    margin: 0;
    text-align: center;
    padding: 0 5vw;
}

#header-img {
    height: var( --header-height);
    max-width: 50%;
    border-radius: var(--logo-border-radius);
}

header {
    background-color: #e5e5e5;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var( --header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: solid 1px white;
    padding: 0 5vw;
}
header a{
    padding: 0 10px;
}

main {
    margin-top: var(--header-height);
}
main section{
    scroll-margin-top: var(--header-height);
}

#form{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#feature-container {
    display: grid;
    place-content: center;
    grid-template-columns: repeat(2, max-content);
    /* 2 columns */
    grid-template-rows: repeat(3, 1fr);
    /* 3 rows */
    gap: 10px 20px;
}

.icon-text{
    text-align: left;
    margin: 0;
}
.icon{
    padding-top: 30px;
    font-size: 3em;
}

#plan-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.plan {
    width: 300px;
    margin: 10px;
    border: solid 1px black;
    height: 400px;
}

#product-plans ul {
    list-style: none;
    padding: 10px;
    height: 50%;
}

#product-plans ul li {
    padding: 10px 0;
}

.plan-heading {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2em;
    width: 100%;
    font-weight: bold;
    height: 1.5em;
    margin: 0;
}

#plan-a .plan-heading {
    background-color: #008C45;
}

#plan-c .plan-heading {
    background-color: #DDDDDD;
}

#plan-b .plan-heading {
    background-color: #CD212A;
}

.button {
    background-color: white;
    padding: 5px 10px;
    border-radius: 20px 20px 20px 20px;
}

a{
    text-decoration: none;
    color: black;
}
footer{
    background-color: #e5e5e5;
    text-align: right;
}
footer li{
    display: inline;
    margin: 0 10px;
}
footer p{
    font-size: 0.8em;
    margin-right: 10px;
    color: #444; 
}

@media (max-width: 900px){
    #plan-container {
        flex-direction: column;
    }
    #feature-container {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .icon-text{
        text-align: center;
    }
}

@media (max-width: 650px){
    nav{
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
    }
}

 @media (max-width: 450px){
    header{
        height: 120px;
    }
    nav a{
        margin-top: 4px;
    }
    main{
        margin-top: 120px;
    }
    main section{
        scroll-margin-top: 120px;
    }
 }