:root {
  --bg: #f7f9fc;
  --panel: #ffffff;
  --text: #102a43;
  --muted: #486581;
  --accent: #0b3d91;
  --border: #d9e2ec;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #eef3fb 0%, var(--bg) 240px);
}
a { color: var(--accent); }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  font-size: 1.1rem;
}
.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - 58px);
}
.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.sidebar a {
  text-decoration: none;
  color: var(--muted);
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
}
.sidebar a.active, .sidebar a:hover {
  background: #e6eefc;
  color: var(--accent);
}
.content {
  padding: 1.5rem 2rem 3rem;
  max-width: 920px;
}
.content h1, .content h2, .content h3 { line-height: 1.25; }
.content pre {
  background: #0b1727;
  color: #f0f4f8;
  padding: 1rem;
  border-radius: 10px;
  overflow: auto;
}
.content code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.92em;
}
.content table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  background: var(--panel);
}
.content th, .content td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.7rem;
  text-align: left;
  vertical-align: top;
}
.gals-print-button {
  border: 1px solid var(--border);
  background: white;
  border-radius: 8px;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
  font-weight: 600;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
}
@media print {
  .topbar, .sidebar, .gals-print-button { display: none !important; }
  .layout { display: block; }
  .content { max-width: 100%; padding: 0; }
}