:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #171717;
  color: #f8fafc;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-width: 320px;
  min-height: 100%;
  background: #171717;
}
body { min-height: 100vh; }
.site-header,
.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  z-index: 100;
  background: #171717;
}
.site-header {
  top: 0;
  height: 64px;
  border-bottom: 1px solid #292929;
}
.site-footer {
  bottom: 0;
  height: 64px;
  border-top: 1px solid #292929;
}
.site-main {
  min-height: 100vh;
  padding: 88px 24px;
  background: #171717;
}
.add-button {
  display: grid;
  place-items: center;
  width: 180px;
  height: 120px;
  padding: 0;
  border: 1px solid #555;
  border-radius: 0;
  background: #222;
  color: #f8fafc;
  cursor: pointer;
}
.add-button svg {
  display: block;
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: square;
}
.add-button:hover {
  background: #2b2b2b;
}
.add-button:focus-visible {
  outline: 2px solid #f8fafc;
  outline-offset: 3px;
}