:root {
  --accent-color: #444;
  --button-bg: #f2f2f2;
  --text-color: #111;
  --bg-color: #fff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --accent-color: #999;
    --button-bg: #222;
    --text-color: #f5f5f5;
    --bg-color: #000;
    color-scheme: dark;
  }
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 2rem;
}
.container {
  max-width: 480px;
  width: 100%;
  text-align: center;
}
.profile-img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-color);
  margin: 0 auto 1.5rem;
}
h1 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}
.social-icons {
  margin-bottom: 1.5rem;
}
.social-icons a {
  margin: 0 0.4rem;
  display: inline-block;
  width: 32px;
  height: 32px;
  color: var(--text-color);
  transition: transform 0.2s ease;
}
.social-icons a:hover {
  transform: scale(1.2);
  color: var(--accent-color);
}
.social-icons svg {
  vertical-align: middle;
  fill: currentColor;
  transition: fill 0.3s ease;
}
.link {
  display: block;
  background-color: var(--button-bg);
  color: var(--text-color);
  text-decoration: none;
  margin: 0.75rem 0;
  padding: 1rem;
  border-radius: 10px;
  font-size: 1.1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.link:hover {
  transform: scale(1.03);
  box-shadow: 0 0 10px var(--accent-color);
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}
:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}
.social-icons a:focus-visible {
  transform: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent-color) 40%, transparent);
}
/* 404 page */
.page-not-found h1 { font-size: 2rem; }
.page-not-found p { font-size: 1.1rem; }
.page-not-found a { color: var(--accent-color); text-decoration: underline; }