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

:root {
  --color-50: #fef9e7;
  --color-100: #fbeebc;
  --color-200: #f9e490;
  --color-300: #f6d965;
  --color-400: #f3ce39;
  --color-500: #f1c40e;
  --color-600: #c6a00c;
  --color-700: #9a7d09;
  --color-800: #6f5a06;
  --color-900: #433704;
  --color-950: #181401;

  --bg-gray-light: #eeeeee;
  --bg-orange: var(--color-500);
  --bg-gray-dark: #dddddd;
  --bg-white: #fff;

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

  --link-bg: var(--color-950);
  --link-hover: var(--color-200);

  --border-color: var(--color-700);
  --border-focus-color: var(--color-500);

  --btn-hover: var(--color-600);
}

html {
  font-size: 62.5%;
}

body {
  min-height: 100dvh;
  line-height: 1.5;
  font-family: "Roboto", sans-serif;
  font-size: 2rem;
  background-color: var(--bg-gray-light);
  position: relative;
}

h1 {
  text-align: center;
}

h2 {
  margin-bottom: 1rem;
}

button,
input {
  font: inherit;
}

li {
  list-style-type: none;
}

img {
  display: block;
  width: 100%;
}

section {
  margin-block: 3rem;
}

#page-layout {
  display: grid;
  grid-template:
    ". .      ." 1.5rem
    ". header ." auto
    ". main   ." 1fr
    ". footer ." auto
    ". .      ." 1rem / minmax(1rem, 1fr) minmax(min-content, 96rem) minmax(
      1rem,
      1fr
    );
  row-gap: 3rem;
}

#header {
  grid-area: header;
  display: grid;
  grid-template-columns: 1fr 2fr;
  justify-items: flex-end;

  position: sticky;
  top: 0;
  container-type: scroll-state;
  container-name: header;
}
#nav-bar {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1rem;
  transition:
    background-color 200ms,
    box-shadow 200ms;
}
.nav-link {
  text-decoration: none;
  color: var(--text-black);
  font-weight: 600;
}
.nav-link:hover {
  text-decoration: underline;
  color: var(--link-bg);
  background-color: var(--link-hover);
}
@container header scroll-state(stuck: top) {
  #nav-bar {
    background-color: var(--bg-white);
    box-shadow: 0 4px 10px rgb(0 0 0 / 0.15);
  }

  #header-img {
    visibility: hidden;
  }
}

#main {
  grid-area: main;
}
form {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
input[type="email"] {
  flex-basis: 30rem;
  padding: 1rem;
  border-radius: 0.8rem;
  border: 1px solid var(--border-color);
}
input:focus-visible {
  outline: 2px solid var(--border-focus-color);
  outline-offset: 3px;
}
input[type="submit"] {
  padding: 1rem;
  border-radius: 0.5rem;
  font-weight: bold;
  text-transform: uppercase;
  border: none;
  background-color: var(--bg-orange);
  transition:
    background-color 200ms,
    color 200ms;
  cursor: pointer;
}
input[type="submit"]:hover {
  background-color: var(--btn-hover);
  color: var(--color-50);
}
input[type="submit"]:active {
  background-color: green;
  color: var(--color-50);
}

.features-grid {
  display: grid;
  row-gap: 1rem;
}

#how-it-works p {
  margin-bottom: 1rem;
}
#how-it-works div {
  aspect-ratio: 16 / 9;
  display: flex;
}
#how-it-works iframe {
  flex-basis: max(100%, 60rem);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
  gap: 2rem;
  text-align: center;

}
.pricing-card {
  border: 1px solid black;
  border-radius: 0.8rem;
  display: grid;
  row-gap: 1.5rem;
}
.pricing-card > h3 {
  padding-block: .6rem;
  background-color: var(--bg-gray-dark);
}
.pricing-card > p{
  font-weight: bold;
}
.pricing-card li {
  margin-block: .4rem;
}
.pricing-card > button {
  width: 50%;
  margin-inline: auto;
  margin-bottom: 1rem;
  background-color: var(--bg-orange);
  border: none;
  padding-block: 1rem;
  border-radius: 1rem;
  text-transform: uppercase;
  font-weight: bold;
  transition: 
    background-color 200ms,
    color: 200ms;
}
.pricing-card > button:hover {
   background-color: var(--btn-hover);
  color: var(--color-50);
}

#footer {
  grid-area: footer;
  background-color: var(--bg-gray-dark);
  display: grid;
  justify-items: flex-end;
  padding: 1rem 2rem;
}
#footer :last-child {
  color: #454545;
}

.red {
  color: red;
}


@media only screen and (max-width: 820px) {
  #pricing {
    font-size: 1.8rem;
  }
}

@media only screen and (max-width: 550px) {
  body {
    font-size: 1.6rem;
  }

  #pricing {
    font-size: 1.6rem;
  }
}

@media only screen and (max-width: 423px) {
 #header {
  grid-template-columns: 1fr;
 }
}