:root {
  color: #050505;
  background: #ffffff;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.45;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #ffffff;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 22px;
}

.brand {
  color: #050505;
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
  flex-wrap: wrap;
}

.nav a {
  color: #050505;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  text-decoration: underline;
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 44px 22px 72px;
}

h1 {
  margin: 0 0 20px;
  font-size: 50px;
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: 0;
}

h2 {
  margin: 68px 0 14px;
  font-size: 25px;
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: 0;
}

h3 {
  margin: 34px 0 12px;
  font-size: 17px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: 0;
}

p {
  margin: 0 0 16px;
  font-size: 16px;
}

.date {
  margin-bottom: 18px;
  font-weight: 700;
}

ul {
  margin: 16px 0 34px;
  padding-left: 22px;
  list-style-type: square;
}

li {
  margin: 0 0 20px;
  font-size: 16px;
}

a {
  color: #000000;
  text-decoration: underline;
}

.support-page {
  max-width: 760px;
  min-height: calc(100vh - 65px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 56px;
  padding-bottom: 56px;
}

.support-page h1 {
  margin-top: 0;
  margin-bottom: 30px;
}

.support-page p {
  max-width: 720px;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 168px;
  min-height: 34px;
  margin-top: 44px;
  border-radius: 3px;
  background: #000000;
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
}

.contact-button:hover {
  background: #222222;
  text-decoration: none;
}

footer {
  margin-top: 88px;
  text-align: center;
  color: #6f6f6f;
  font-size: 16px;
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 16px 18px;
  }

  .nav {
    justify-content: flex-start;
    gap: 14px;
  }

  main {
    padding: 34px 18px 56px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    margin-top: 52px;
    font-size: 23px;
  }

  .support-page {
    min-height: calc(100vh - 105px);
    padding-top: 42px;
    padding-bottom: 42px;
  }
}