style.css

@import url('https://fonts.googleapis.com/css?family=Open+Sans:300,400&display=swap');

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

/* Primary Styling */
html,
body {
  font-family: 'Open sans', sans-serif;
  background: #fff;
  color: #333;
  line-height: 1.6;
}

ul {
  list-style: none;
}

a {
  color: #333;
  text-decoration: none;
}

h1,
h2 {
  font-weight: 300;
  line-height: 1.2;
}

p {
  margin: 10px 0;
}

img {
  width: 100%;
}

/* Main Nav */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #333;
  color: #fff;
  opacity: 0.7;
  width: 100%;
  height: 70px;
  position: fixed;
  top: 0px;
  padding: 0 30px;
  transition: 0.5s;
}

.navbar.top {
  background: transparent;
}

.navbar a {
  color: #fff;
  padding: 10px 20px;
  margin: 0 5px;
}

.navbar a:hover,
a:focus,
.current {
  border-bottom: #dd7631 2px solid;
}

.navbar ul {
  display: flex;
}

.navbar .logo {
  font-weight: 400;
}

/* Header */
.hero {
  background: url('photo1.jpg') no-repeat center center/cover;
  height: 100vh;
  position: relative;
  color: #fff;
}

.hero .content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100%;
  padding: 0 20px;

}

.hero .content h1 {
  font-size: 55px;


}

.hero .content p {
  font-size: 23px;
  max-width: 600px;
  margin: 20px 0 30px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
}

.hero * {
  z-index: 10;
}

.hero.blog {
  background: url("tech-javascript.jpg") no-repeat center center/cover;
  height: 40vh;
}

.hero.services {
  background: url("service-hero.jpg") no-repeat center center/cover;
  height: 100vh;
}

/* Icons */
.icons h3 {
  font-weight: bold;
  margin-bottom: 15px;
}

.icons i {
  background-color: #dd7631;
  color: #fff;
  padding: 1rem;
  border-radius: 50%;
  margin-bottom: 15px;
}

.portfolio img:hover {
  opacity: 0.7;
}

.team img {
  border-radius: 50%;
  width: 250px;
  margin: 10px;
}

/* Callback form */
.callback-form {
  width: 100%;
  padding: 20px 0;
}

.callback-form label {
  display: block;
  margin-bottom: 5px;
}

.callback-form .form-control {
  margin-bottom: 15px;
}

.callback-form input {
  width: 100%;
  padding: 4px;
  height: 40px;
  border: #f5f5f5 1px solid;
}

.callback-form input:focus,
.callback-form input:hover {
  outline-color: #dd7631;
}

.callback-form .btn {
  padding: 12px 0;
  margin-top: 20px;
}

/* footer */
.footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 200px;
}

.footer a:hover {
  color: #dd7631;
}

.footer a {
  color: #fff;
}

.footer .social>* {
  margin-right: 30px;
}


/* Services HTML Page 
 Service Pricing */
/* Content */
.content a {
  margin-top: 40px;
}

/* Service Pricing */
.price {
  font-weight: 600;
  font-size: 35px;
}

/* an example for the article to demonstrate css */
.css-example {

  font-family: 'helvetica neue', helvetica, sans-serif;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-align: center;
  border: 2px solid rgba(0, 0, 200, 0.6);
  background: rgba(0, 0, 200, 0.3);
  color: rgba(0, 0, 200, 0.6);
  box-shadow: 1px 1px 2px rgba(0, 0, 200, 0.4);
  border-radius: 10px;
  padding: 3px 10px;
  display: inline-block;
  cursor: pointer;
}

#main-footer .contact-me {
  margin: 15px auto;
}

#main-footer .p-tea {
  margin-bottom: 5px;
}

#main-footer .contact-me input {
  padding: 10px;
  margin-left: 15px;
  outline-color: #dd7631;
  border-radius: 5px;
}

/* Navigation: article */
#sec-navbar ul {
  border: 1px solid;
  height: 207px;
  overflow-y: auto;
  overflow-x: hidden;
  background-color: #f5f5f5;
}

#sec-navbar li {
  text-align: center;
  line-height: 1.6;
  padding: 10px 30px;
  border-top: 1px solid;
  font-size: 18px;

}

#sec-navbar a,
#sec-navbar a:visited,
#sec-navbar a:focus {
  color: #333;
}

/* Mobile */
@media(max-width: 768px) {
  .navbar {
    flex-direction: column;
    height: 150px;
    padding: 20px;
    margin-bottom: 50px;
  }

  .navbar a {
    padding: 10px 10px;
    margin: 0px 3px;

  }

  .content h1 {
    margin-top: 70px;
  }

  .flex-items {
    flex-direction: column;
  }

  .flex-columns .column,
  .flex-grid .column {
    flex: 100%;
    max-width: 100%;
  }

  .team img {
    width: 70%;
  }

}

@media(max-width: 768px) {
  .navbar a {
    margin: 3px 3px;
    padding: 10px 3px;
  }
}