:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #555555;
  --border: #cccccc;
  --card-bg: #f4f4f4;
  --btn-bg: #222222;
  --btn-fg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181818;
    --fg: #eeeeee;
    --muted: #aaaaaa;
    --border: #444444;
    --card-bg: #262626;
    --btn-bg: #eeeeee;
    --btn-fg: #181818;
  }
}

body:has(#theme-toggle:checked) {
  --bg: #181818;
  --fg: #eeeeee;
  --muted: #aaaaaa;
  --border: #444444;
  --card-bg: #262626;
  --btn-bg: #eeeeee;
  --btn-fg: #181818;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 2rem 1rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
}

.theme-switch {
  text-align: right;
  max-width: 700px;
  margin: 0 auto 2rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.page {
  max-width: 700px;
  margin: 0 auto;
}

.icon-wrap {
  width: 128px;
  height: 128px;
  background: #202020;
  border-radius: 16px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon {
  width: 96px;
  height: 96px;
}

h1 {
  font-size: 2.2rem;
  margin: 0 0 0.5rem;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto 2rem;
  line-height: 1.5;
}

.buttons {
  margin-bottom: 3rem;
}

.btn {
  display: inline-block;
  padding: 0.9rem 1.6rem;
  margin: 0.3rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--border);
  text-decoration: none;
  font-size: 1.1rem;
  vertical-align: middle;
}

.btn svg {
  vertical-align: middle;
  margin-right: 0.5rem;
}

.btn .small {
  display: block;
  font-size: 0.75rem;
  font-weight: normal;
  opacity: 0.8;
}

.btn-secondary {
  background: transparent;
  color: var(--fg);
}

.btn-small {
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  background: transparent;
  color: var(--muted);
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.about {
  text-align: left;
}

.about h2 {
  font-size: 1.3rem;
}

.about p {
  line-height: 1.6;
}

.about ul {
  line-height: 1.8;
  padding-left: 1.2rem;
}

footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--muted);
}

footer a {
  color: var(--muted);
}