:root {
  color-scheme: dark;
  --io-bg: #0a0a0a;
  --io-panel: #121212;
  --io-panel-soft: #171717;
  --io-text: #e8e8e8;
  --io-muted: #929292;
  --io-line: #363636;
  --io-accent: #d86f6f;
  --io-accent-soft: #b95f5f;
}

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

html {
  scroll-behavior: smooth;
}

body {
  overflow-wrap: anywhere;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--io-accent);
  outline-offset: 4px;
}

.site-back,
.site-nav a,
.site-footer a {
  color: #bdbdbd;
  text-decoration: none;
}

.site-back:hover,
.site-nav a:hover,
.site-footer a:hover {
  color: #fff;
}

.site-back {
  display: inline-block;
  margin: 0 0 2.4rem;
  font-family: monospace;
  font-size: 0.86rem;
  letter-spacing: 0.04em;
}

.site-footer {
  margin-top: 5rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--io-line);
  color: var(--io-muted);
  font-family: monospace;
  font-size: 0.82rem;
  line-height: 1.7;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  margin-bottom: 0.7rem;
}

.archive-tag {
  color: var(--io-muted);
  font-family: monospace;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.system-panel {
  margin: 2rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid var(--io-line);
  background: var(--io-panel);
  color: #bdbdbd;
  font-family: monospace;
  font-size: 0.9rem;
  line-height: 1.7;
}

.skip-link {
  position: fixed;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 100;
  padding: 0.55rem 0.75rem;
  transform: translateY(-180%);
  background: #fff;
  color: #000;
  font-family: monospace;
}

.skip-link:focus {
  transform: translateY(0);
}

@media (max-width: 640px) {
  .site-footer {
    margin-top: 3.5rem;
  }
}