.site-shell {
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 140px),
    #181818;
}

.container {
  width: min(1200px, calc(100% - 24px));
  margin: 0 auto;
}

.topbar {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}

.mainnav,
.notice-board,
.hero,
.content-block,
.site-footer {
  margin-top: 10px;
}

.notice-board {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 10px;
}

.content-block {
  padding: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.text-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.site-footer {
  padding: 16px 0 30px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}