import url('https://fonts.googleapis.com/css?family=Poppins:200i,400&display=swap');

*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
}
.header{
    min-height: 100vh;
    width: 100%;
    background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),url(images/banner.png);
    background-position: center;
    background-size: cover;
    position: relative;
    overflow: hidden;
}

nav{
    display: flex;
    padding: 2% 4%;
    justify-content: space-between;
    align-items: center;
}
nav img{
    width: 135px;
}
.nav-links{
    flex: 1;
    text-align: right;
}
.nav-links ul li{
    list-style: none;
    display: inline-block;
    padding: 8px 12px;
    position: relative;
}
.nav-links ul li a{
    color: #fff;
    text-decoration: none;
    font-size: 13px;
}
.nav-links ul li::after{
    content: '';
    width: 0%;
    height: 2px;
    background: #f44336;
    display: block;
    margin: auto;
    transition: .5s;    
}
.nav-links ul li:hover::after{
    width: 100%;
}
nav .fa{
    display: none;
}

:root {
  --color-white: #f3f3f3;
  --color-darkblue: #1b1b32;
  --color-darkblue-alpha: rgba(27, 27, 50, 0.8);
  --color-green: #37af65;
}

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

nav {
    position: sticky;
    top: 0;
    left: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 3.5rem;
    background-color: var(--bg-color);
    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.1);
  }


  nav h1 {
    color: var(--primary-color);
  }
  
  nav a {
    color: var(--primary-color);
    transition: var(--transition);
  }
  nav a:hover {
    color: var(--secondary-color);
    border-bottom: 2px solid var(--secondary-color);
  }
  
  nav ul {
    display: flex;
    gap: 1.9rem;
  }
  
  nav ul li {
    font-weight: var(--bold-font);
  }
  .burger-menu {
    color: var(--primary-color);
    font-size: 2rem;
    border: 0;
    background-color: transparent;
    cursor: pointer;
    display: none;
  }

body {
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-white);
  margin: 0;
}

/* mobile friendly alternative to using background-attachment: fixed */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  z-index: -1;
  background: var(--color-darkblue);
  background-image: linear-gradient(
      115deg,
      rgba(58, 58, 158, 0.8),
      rgba(136, 136, 206, 0.7)
    ),
    url(https://cdn.freecodecamp.org/testable-projects-fcc/images/survey-form-background.jpeg);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
}

h1 {
  font-weight: 400;
  line-height: 1.2;
}

p {
  font-size: 1.125rem;
}

h1,
p {
  margin-top: 5;
  margin-bottom: 0.5rem;
}

label {
  display: flex;
  align-items: center;
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

input,
button,
select,
textarea {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  border: none;
}

.container {
  width: 100%;
  margin: 3.125rem auto 0 auto;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

.header {
  padding: 0 0.625rem;
  margin-bottom: 1.875rem;
}

.description {
  font-style: italic;
  font-weight: 200;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.4);
}

.clue {
  margin-left: 0.25rem;
  font-size: 0.9rem;
  color: #e4e4e4;
}

.text-center {
  text-align: center;
}

/* form */

form {
  background: var(--color-darkblue-alpha);
  padding: 2.5rem 0.625rem;
  border-radius: 0.25rem;
}

@media (min-width: 480px) {
  form {
    padding: 2.5rem;
  }
}

.form-group {
  margin: 20 500 1.25rem 500;
  padding: 0.25rem;
}

.form-control {
  display: block;
  width: 100%;
  height: 2.375rem;
  padding: 0.375rem 0.75rem;
  color: #495057;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #ced4da;
  border-radius: 0.25rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  border-color: #80bdff;
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.input-radio,
.input-checkbox {
  display: inline-block;
  margin-right: 0.625rem;
  min-height: 1.25rem;
  min-width: 1.25rem;
}

.input-textarea {
  min-height: 120px;
  width: 100%;
  padding: 0.625rem;
  resize: vertical;
}

.submit-button {
  display: block;
  width: 100%;
  padding: 1rem;
  background: orange;
  color: black;
  border-radius: 2px;
  cursor: pointer;
}