/* CSS file for the stylization of the site */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background-color: #0f1115;
  color: #e9ecef;
  font-family: Arial, Helvetica, sans-serif;
  margin: 10px; /* required */
  line-height: 1.6;
}

header, nav, main, footer { max-width: 1000px; margin: 0 auto; }

/* Center page header, navigation, and footer */
h1 { text-align: center; }
nav { text-align: center; }
footer { text-align: center; }

nav a {
  display: inline-block;
  padding: 10px 14px;
  margin: 6px 4px;
  text-decoration: none;
  color: #e9ecef;
  border: 1px solid #3a3f4b;
  border-radius: 999px;
}
nav a:hover, nav a:focus { background: #222735; }

main {
  background:#151922;
  border:1px solid #242a36;
  border-radius:16px;
  padding: 18px;
}

/* Fade effect */
.fade {
  transition: opacity 0.8s;
}

.fade:hover {
  opacity: 0.3;
}

main img { max-width: 100%; height: auto; border-radius: 12px; }

figure { margin: 1.25rem auto; text-align: center; }
figcaption { color: #bfc6d0; font-size: 0.95rem; margin-top: 0.5rem; }

hr { border: none; border-top: 1px solid #2c3340; margin: 1.5rem 0; }

.small { font-size: 0.9rem; color: #cfd6df; }

.callout {
  background: #1b2230;
  border: 1px solid #2a3344;
  border-radius: 12px;
  padding: 12px 14px;
  margin: 12px 0;
}

a.validator { color: #93c5fd; }