/* Frontend Engine — Layout System */
.layout-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
}
.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }

.auto-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.dashboard-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 16px;
  min-height: calc(100vh - 90px);
}
.sidebar {
  background: #0b1220;
  border: 1px solid #1f2937;
  border-radius: 16px;
  padding: 16px;
}
.sidebar nav { display: grid; gap: 8px; }
.sidebar a {
  padding: 10px 12px;
  border-radius: 10px;
  color: #94a3b8;
}
.sidebar a:hover,
.sidebar a.is-active {
  color: #e5e7eb;
  background: rgba(124,58,237,.18);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}
.chart-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}

.market-shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 16px;
}
.filters { padding: 16px; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.blog-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
}

.masonry {
  column-count: 3;
  column-gap: 16px;
}
.masonry > .card {
  break-inside: avoid;
  margin-bottom: 16px;
}

@media (max-width: 1100px) {
  .col-8, .col-6, .col-4, .col-3 { grid-column: span 12; }
  .chart-grid, .market-shell, .blog-layout { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .dashboard-shell { grid-template-columns: 1fr; }
  .masonry { column-count: 2; }
}

@media (max-width: 560px) {
  .masonry { column-count: 1; }
}