:root {
  --bg-color: #282c34;
  --text-color: #e0e0e0;
  --link-color: #61dafb;
  --link-hover-color: #88eaff;
  --border-color: #333;
  --button-bg-color: #61dafb;
  --button-text-color: #282c34;
  --button-hover-bg-color: #88eaff;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-color: #ededed;
    --text-color: #333;
    --link-color: #007bff;
    --link-hover-color: #0056b3;
    --border-color: #eee;
    --button-bg-color: #007bff;
    --button-text-color: #fff;
    --button-hover-bg-color: #0056b3;
  }
}

html {
  color: #222;
  font-size: 1em;
  line-height: 1.4;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  background-color: var(--bg-color);
  color: var(--text-color);
  text-align: center;
  line-height: 1.6;
}

header, main {
  max-width: 680px;
  margin: 0 auto;
  padding: 1em 1em;
}

header {
  padding-bottom: 0.5em;
}

h1 {
  font-size: 2.5em;
  margin-bottom: 0.1em;
}

h2 {
  font-size: 1.8em;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.25em;
  margin-bottom: 0.5em;
}

h3 {
  font-size: 1.2em;
  margin-bottom: 0.2em;
}

section {
  margin-bottom: 1em;
  text-align: left;
  margin-top: 2em;
}

#connect ul {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 1.5em;
  justify-content: center;
  font-size: 1.1em;
}

#connect {
  text-align: center;
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}

a:hover {
  color: var(--link-hover-color);
  text-decoration: underline;
}

.button {
  display: inline-block;
  background-color: var(--button-bg-color);
  color: var(--button-text-color);
  padding: 12px 24px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  margin-top: 1em;
  transition: background-color 0.2s ease-in-out;
}

.button:hover {
  background-color: var(--button-hover-bg-color);
  color: var(--button-text-color);
  text-decoration: none;
}

.center-button {
  text-align: center;
}

.tagline {
  font-size: 1.3em;
  font-weight: bold;
  margin: 1em 0 0.5em 0;
}