:root {
  --madali-blue: #2079B1;
  --ocean-blue: #185E92;
  --navy-ink: #09253B;
  --paper: #F7F9FB;
  --ink-soft: #5A6B79;

  --font-sans: "Hanken Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

.banner {
  width: 100%;
  max-width: 36rem;
  text-align: center;
}

.banner__title {
  margin: 0 0 1.5rem;
  color: var(--navy-ink);
  font-size: 1.875rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.banner__message {
  margin: 0 auto;
  max-width: 28rem;
  font-size: 1rem;
  line-height: 1.625;
}

.banner__contact {
  margin: 2rem 0 0;
  font-size: 0.875rem;
  overflow-wrap: break-word;
}

.banner__contact a {
  color: var(--madali-blue);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.banner__contact a:hover {
  color: var(--ocean-blue);
}

.mark {
  margin: 2.5rem auto 0;
  display: grid;
  width: 2rem;
  height: 2rem;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
}

.mark i {
  display: block;
}

.mark .mark__top { grid-area: 1 / 2; background: var(--madali-blue); }
.mark .mark__right { grid-area: 2 / 3; background: var(--madali-blue); }
.mark .mark__left { grid-area: 2 / 1; background: var(--ocean-blue); }
.mark .mark__bottom { grid-area: 3 / 2; background: var(--ocean-blue); }

@media (min-width: 640px) {
  .banner__title {
    font-size: 2.25rem;
  }
  .banner__message {
    font-size: 1.125rem;
  }
}

@media (min-width: 768px) {
  .banner__title {
    font-size: 3rem;
  }
}