:root {
  color-scheme: dark;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  line-height: 1.55;
  background: #0d1117;
  color: #e8e4da;
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; }

body.viewer-page { height: 100%; overflow: hidden; background: #0b0e12; }

#app { width: 100%; height: 100%; }
#app canvas { display: block; }

.overlay {
  position: fixed;
  left: 12px;
  z-index: 10;
  color: #e8e4da;
  background: rgb(15 18 24 / 72%);
  border: 1px solid rgb(255 255 255 / 12%);
  border-radius: 8px;
  backdrop-filter: blur(4px);
}

#title { top: 12px; padding: 8px 14px; font-size: 13px; }
#title small { color: #9aa3ad; }
#title a, .go { color: #8fc7ff; text-decoration: none; }
#hud { bottom: 12px; max-width: 370px; padding: 10px 14px; font-size: 12px; line-height: 1.5; }
#hud b, .card h2 { color: #ffd479; }

.landing { max-width: 980px; margin: 0 auto; padding: 48px 24px 64px; }
.landing h1 { margin: 0 0 6px; font-size: 22px; letter-spacing: .04em; }
.sub { margin: 0 0 36px; color: #9aa3ad; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.card {
  display: block;
  padding: 20px 22px;
  color: inherit;
  text-decoration: none;
  background: #161c24;
  border: 1px solid #2a333e;
  border-radius: 12px;
  transition: border-color .15s, transform .15s;
}
.card:hover, .card:focus-visible { border-color: #5b9dd9; transform: translateY(-2px); outline: none; }
.card h2 { margin: 0 0 4px; font-size: 17px; }
.card .meta { margin-bottom: 10px; color: #8fc7ff; font-size: 12px; }
.card p { margin: 0; color: #b9c0c8; font-size: 13px; }
.card .go { display: inline-block; margin-top: 12px; font-size: 13px; }
footer { margin-top: 40px; color: #6b747e; font-size: 12px; }

@media (max-width: 720px) {
  #title { right: 12px; }
  #title small { display: block; margin-top: 4px; }
  #hud { right: 12px; max-width: none; }
  .landing { padding: 32px 16px 48px; }
}

@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
}