:root {
  --primary-color: #333;
  --secondary-color: #444;
  --overlay-color: rgba(0, 0, 0, 0.7);
}

* {
  box-sizing: border-box; /* this prevents from paddings and borders to add width to the element */
  margin: 0;
  padding: 0;
}

body {
  font-family: "Catamaran", "sans-serif";
  line-height: 1.6;
  color: #333;
  font-size: 1.1rem;
}

h1,
h2,
h3,
h4 {
  line-height: 1.3;
}

a {
  color: var(--secondary-color);
  text-decoration: none; /* this removes the underline*/
}

ul {
  list-style: none; /* this removes the bullets*/
}

img {
  width: 100%;
}

.container {
  max-width: 1100px; /* for responsive purposes. this is a standard value */
  margin: auto; /* it gets put in the middle. even margins in left and right */
  overflow: hidden; /* nothing breaks out of its container */
  padding: 0 2rem;
}

.navbar {
  font-size: 1.2rem;
  padding-top: 0.3rem;
  padding-bottom: 0.3rem;
}

.navbar .container {
  display: grid; /* we are using CSS grid, applied to the h1 and the li's*/
  grid-template-columns: repeat(2, 1fr); /* we are setting 2 even columns */
}

.navbar .logo {
  font-size: 2rem;
}

.navbar .nav {
  justify-self: flex-end; /* first, we are putting the li's to the right*/
  display: flex; /* this is for putting the li's side by side. we are using flexbox*/
  align-items: center;
  justify-content: center;
}

.navbar .nav a {
  padding: 0 1rem;
}

.navbar .nav a:hover {
  color: #555;
}

.section-a {
  margin: 2rem 0;
}

.section-a .container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-gap: 3rem; /* the space between the columns*/
  align-items: center;
  justify-content: center;
}

.section-a h1 {
  font-size: 4rem;
  color: var(--primary-color);
}

.section-a p {
  margin: 1rem 0;
}

/* Section B*/

.section-b {
  position: relative;
  background: url("../img/backgnd.jpg") no-repeat bottom center/cover;
  height: 600px;
}

.section-b-inner {
  color: #fff;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: auto;
  max-width: 860px;
  padding: 5rem 0;
}

.section-b-inner h3 {
  font-size: 2rem;
}

.section-b-inner h2 {
  font-size: 5rem;
  margin-top: 1rem;
}

.section-b-inner p {
  font-size: 1.5rem;
  margin-top: 1rem;
}

/* Section C */

.section-c .gallery {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}

.section-c .gallery a:first-child {
  /* we are placing the 1st image within rows 1-3 and cols 1-3*/
  grid-row: 1/3;
  grid-column: 1/3;
}

.section-c .gallery a:nth-child(2) {
  /* we are placing the 1st image within rows 1-3 and cols 1-3*/
  grid-column: 3/5;
  grid-row: 1/2;
}

.section-c .gallery img,
.section-c .gallery a {
  /* we are getting rid of the spaces between the images*/
  width: 100%;
  height: 100%;
}

/* Footer */
.section-footer {
  background: var(--primary-color);
  color: #fff;
  padding: 4rem 0;
}

.section-footer .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 1rem;
}

.section-footer h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.section-footer h3 {
  margin-bottom: 0.7rem;
}

.section-footer a {
  line-height: 1.9;
  color: #ccc;
}

.section-footer a > i {
  color: #555;
  margin-right: 0.5rem;
}

/* Email Form*/
.email-form {
  width: 100%;
  display: inline-block;
  background-color: #555;
  position: relative;
  border-radius: 20px;
  line-height: 0;
  margin-top: 1rem;
}

.email-form .form-control {
  display: inline-block;
  border: 0;
  outline: 0;
  font-size: 1rem;
  color: #ddd;
  background-color: transparent;
  font-family: inherit;
  margin: 0;
  padding: 0 3rem 0 1.5rem;
  width: 100%;
  height: 45px;
  border-radius: 20px;
}

.email-form .submit {
  display: inline-block;
  position: absolute;
  top: 0;
  right: 0;
  width: 45px;
  height: 45px;
  background-color: #eee;
  font-size: 1rem;
  text-align: center;
  margin: 0;
  padding: 0;
  outline: 0;
  border: 0;
  color: #333;
  cursor: pointer;
  border-radius: 0 20px 20px 0;
}

/* Utilities */

.btn {
  display: inline-block; /* allows to set a width and height on the element. it doesnt take up its own line. 
  it does not add a line-break after the element, so the element can sit next to other elements.*/
  background: var(--primary-color);
  color: #fff;
  padding: 0.8rem 1.5rem;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  border-radius: 30px;
}

.btn:hover {
  background: var(--secondary-color);
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background-color: var(
    --overlay-color
  ); /* this makes it traslucid by setting the opacity*/
}

/* Media queries */
@media (max-width: 700px) {
  .section-a .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .section-a .container div:last-child {
    order: -1;
  }

  .section-a img {
    width: 80%;
    margin: auto;
  }

  .section-b-inner h2 {
    font-size: 3.5rem;
  }

  .section-c .gallery {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-c .gallery a:first-child {
    grid-row: 1/1;
    grid-column: 1/1;
  }

  .section-c .gallery a:nth-child(2) {
    grid-row: 2/2;
    grid-column: 2/4;
  }

  .section-c .gallery a:last-child {
    display: none;
  }

  .section-footer {
    padding: 2rem 0;
  }

  .section-footer .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .section-footer div:nth-child(2),
  .section-footer div:nth-child(3) {
    display: none;
  }
}