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+/**
+ * @file
+ * Positioning for a grid-based fixed-width, desktop-centric layout.
+ *
+ * Define CSS classes to create a table-free, 3-column, 2-column, or single
+ * column layout depending on whether blocks are enabled in the left or right
+ * columns.
+ *
+ * This layout is based on the grid layout method.
+ *   http://www.w3.org/TR/css3-grid-layout/
+ */
+
+/**
+ * Center the page.
+ *
+ * If you want to make the page a fixed width and centered in the viewport,
+ * this is the standards-compliant way to do that.
+ */
+.page,
+.region-bottom {
+  margin-left: auto;
+  margin-right: auto;
+  width: 980px;
+}
+
+
+.page {
+  padding: 0 10px;
+
+  display: grid;
+
+  display: -ms-grid;
+
+  /* Default rows are: header, navbar, main, footer */
+  grid-definition-rows: "header" 120px "navbar" 40px "main"  auto "footer" 100px;
+
+  -ms-grid-rows: 120px 40px auto 100px;
+
+  /* 16 column grid, eg. http://960.gs/demo.html
+   * functionally 31 columns, alternating 40/20px; resulting in 32 grid lines */
+  grid-definition-columns: 40px (20px 40px)[15];
+  -ms-grid-columns: 40px (20px 40px)[15];
+
+  /* 12 column grid, eg. http://960.gs/demo.html
+   * functionally 23 columns, alternating 60/20px; resulting in 24 grid lines */
+  grid-definition-columns: 60px (20px 60px)[11];
+  -ms-grid-columns: 60px (20px 60px)[11];
+
+}
+
+/* Apply the shared properties of grid items in a single, efficient ruleset. */
+.header,
+.main-content,
+.main-navigation,
+.region-sidebar-first,
+.region-sidebar-second,
+.footer {
+  padding-left: 10px;
+  padding-right: 10px;
+  border-left: 0 !important;
+  border-right: 0 !important;
+  word-wrap: break-word;
+  *behavior: url("/path/to/boxsizing.htc");
+  _display: inline;
+  _overflow: hidden;
+  _overflow-y: visible;
+}
+
+/*
+ * Header
+ */
+.header {
+  grid-column: 1 / 24;
+  grid-row: "header";
+
+  -ms-grid-column: 1;
+  -ms-grid-column-span: 24;
+  -ms-grid-row: 1;
+}
+
+.main {
+  grid-row: "main";
+  grid-column: 1 / 24;
+
+  -ms-grid-column: 1;
+  -ms-grid-column-span: 24;
+  -ms-grid-row: "main";
+  -ms-grid-row: 3;
+}
+
+/* Navigation bar */
+.main-navigation {
+  position: grid;
+  grid-column: 1 / 24;
+  grid-row: "navbar";
+
+  -ms-position: grid;
+  -ms-grid-column: 1;
+  -ms-grid-column-span: 24;
+  -ms-grid-row: "navbar";
+  -ms-grid-row: 2;
+}
+
+/* Content */
+.main-content {
+  position: grid;
+  grid-row: "main";
+  grid-column: 1 / 24;
+
+  -ms-grid-row: "main";
+  -ms-grid-row: 3;
+  -ms-grid-column: 1;
+  -ms-grid-column-span: 24;
+}
+
+.region-sidebar {
+  position: grid;
+  grid-row: "main";
+
+  -ms-grid-row: "main";
+  -ms-grid-row: 3;
+  position: -ms-grid;
+}
+
+/**
+ * The layout when there is only one sidebar, the left one.
+ */
+
+/* Span 9 columns plus gutters, starting in 4th column from left. */
+.sidebar-first .main-content {
+  grid-column: 7 / 24;
+
+  -ms-grid-column: 7;
+  -ms-grid-column-span: 24;
+}
+
+/* Span 3 column, starting in 1st column from left. */
+.region-sidebar-first {
+  grid-column: 1 / 5;
+
+  -ms-grid-column: 1;
+  -ms-grid-column-span: 5;
+}
+
+/**
+ * The layout when there is only one sidebar, the right one.
+ */
+
+/* Span 9 columns plus gutters, starting in 1st column from left. */
+.sidebar-second .main-content {
+  grid-column: 1 / 18;
+
+  -ms-grid-column: 1;
+  -ms-grid-column-span: 18;
+}
+
+/* Span 3 columns, starting in 3rd column from right. */
+.region-sidebar-second {
+  grid-column: 19 / 24;
+
+  -ms-grid-column: 19;
+  -ms-grid-column-span: 24;
+}
+
+/**
+ * The layout when there are two sidebars.
+ */
+
+/* Span 6 columns, starting in 2nd column from left. */
+.two-sidebars .main-content {
+  grid-column: 7 / 18;
+
+  -ms-grid-column: 7;
+  -ms-grid-column-span: 18;
+}
+
+/* Footer */
+.footer {
+  position: grid;
+  grid-row: "footer";
+  grid-column: 1 / 24;
+
+  -ms-grid-row: "main";
+  -ms-grid-row: 4;
+  -ms-grid-column: 1;
+  -ms-grid-column-span: 24;
+}
+