:root {
  --text: #6a859c;
  --heading: #676770;
  --accent: #69b9ff;
  --accent-dark: #2e9dff;
  --border: #dcebf7;
  --dark: #192024;
  --footer: #edeff2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Open Sans", sans-serif;
  font-weight: 300;
  color: var(--text);
  background: #fff;
}

img {
  max-width: 100%;
}

h1, h2, h3, h4 {
  margin: 0 0 16px;
  font-weight: 300;
  text-transform: uppercase;
  color: var(--heading);
}

h2 {
  font-size: 30px;
  letter-spacing: 5px;
  margin-bottom: 60px;
}

h3 {
  font-size: 20px;
  letter-spacing: 7px;
}

h4 {
  font-size: 18px;
  letter-spacing: 4px;
}

p {
  font-size: 15px;
  line-height: 1.7;
  margin: 10px 0;
}

.container {
  max-width: 940px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header */

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  padding-bottom: 12px;
}

.brand img {
  display: block;
  height: 50px;
  width: auto;
}

.site-header nav a {
  margin-left: 24px;
  color: var(--heading);
  text-decoration: none;
  transition: color 0.3s;
}

.site-header nav a:hover {
  color: var(--accent-dark);
}

/* Hero */

.hero {
  padding: 180px 0;
  text-align: center;
  border-bottom: 4px solid var(--accent);
  background:
    linear-gradient(rgba(46, 157, 255, 0.5), rgba(46, 157, 255, 0.22)),
    url("../images/hero.jpg") center / cover;
}

.hero h1 {
  color: #fff;
  font-size: clamp(32px, 7vw, 60px);
  line-height: 1.1;
  letter-spacing: 4px;
  margin-bottom: 30px;
}

.hero p {
  color: #f0f0f0;
  font-size: clamp(16px, 3vw, 25px);
  letter-spacing: 3px;
  text-transform: uppercase;
}

/* Sections */

.section {
  padding: 80px 0;
  text-align: center;
}

.section.dark {
  background: var(--dark);
}

.section.dark h2 {
  color: #fff;
}

.grid {
  display: grid;
  gap: 20px;
}

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

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: 5px;
}

.card .icon {
  display: block;
  width: 35%;
  max-width: 110px;
  margin: 20px auto;
  padding: 20px;
  border: 10px solid #fff;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-dark);
}

.solutions {
  list-style: none;
  margin: 0;
  padding: 0;
}

.solutions li {
  padding: 15px;
  color: #fff;
  font-size: 20px;
  letter-spacing: 7px;
  text-transform: uppercase;
}

.contact h2 {
  margin-bottom: 16px;
}

.button {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 30px;
  border-radius: 3px;
  background: var(--accent-dark);
  color: #fff;
  text-decoration: none;
  transition: background 0.3s;
}

.button:hover {
  background: var(--accent);
}

/* Footer */

.site-footer {
  padding: 35px 0;
  background: var(--footer);
}

@media (max-width: 767px) {
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 100px 0;
  }

  h2 {
    font-size: 24px;
    letter-spacing: 3px;
    margin-bottom: 40px;
  }
}