First commit with initial theme

Some file are empty (created by `hugo new theme`), but I've left
them for reference later.

source/scss/main.scss

@@ -0,0 +1,169 @@
+/*
+ * From the Bootstrap v4 alpha blog example
+ * See: http://v4-alpha.getbootstrap.com/examples/blog/blog.css
+ */
+
+/*
+ * Globals
+ */
+
+@media (min-width: 48em) {
+  html {
+    font-size: 18px;
+  }
+}
+
+body {
+  color: #555;
+}
+
+h1, .h1,
+h2, .h2,
+h3, .h3,
+h4, .h4,
+h5, .h5,
+h6, .h6 {
+  font-weight: normal;
+  color: #333;
+}
+
+
+/*
+ * Override Bootstrap's default container.
+ */
+
+.container {
+  max-width: 60rem;
+}
+
+
+/*
+ * Masthead for nav
+ */
+
+.blog-masthead {
+  margin-bottom: 3rem;
+  background-color: #428bca;
+  -webkit-box-shadow: inset 0 -.1rem .25rem rgba(0,0,0,.1);
+          box-shadow: inset 0 -.1rem .25rem rgba(0,0,0,.1);
+}
+
+/* Nav links */
+.nav-link {
+  position: relative;
+  padding: 1rem;
+  font-weight: 500;
+  color: #cdddeb;
+}
+.nav-link:hover,
+.nav-link:focus {
+  color: #fff;
+  background-color: transparent;
+}
+
+/* Active state gets a caret at the bottom */
+.nav-link.active {
+  color: #fff;
+}
+.nav-link.active:after {
+  position: absolute;
+  bottom: 0;
+  left: 50%;
+  width: 0;
+  height: 0;
+  margin-left: -.3rem;
+  vertical-align: middle;
+  content: "";
+  border-right: .3rem solid transparent;
+  border-bottom: .3rem solid;
+  border-left: .3rem solid transparent;
+}
+
+
+/*
+ * Blog name and description
+ */
+
+.blog-header {
+  padding-bottom: 1.25rem;
+  margin-bottom: 2rem;
+  border-bottom: .05rem solid #eee;
+}
+.blog-title {
+  margin-bottom: 0;
+  font-size: 2rem;
+  font-weight: normal;
+}
+.blog-description {
+  font-size: 1.1rem;
+  color: #999;
+}
+
+@media (min-width: 40em) {
+  .blog-title {
+    font-size: 3.5rem;
+  }
+}
+
+
+/*
+ * Main column and sidebar layout
+ */
+
+/* Sidebar modules for boxing content */
+.sidebar-module {
+  padding: 1rem;
+  /*margin: 0 -1rem 1rem;*/
+}
+.sidebar-module-inset {
+  padding: 1rem;
+  background-color: #f5f5f5;
+  border-radius: .25rem;
+}
+.sidebar-module-inset p:last-child,
+.sidebar-module-inset ul:last-child,
+.sidebar-module-inset ol:last-child {
+  margin-bottom: 0;
+}
+
+
+/* Pagination */
+.blog-pagination {
+  margin-bottom: 4rem;
+}
+.blog-pagination > .btn {
+  border-radius: 2rem;
+}
+
+
+/*
+ * Blog posts
+ */
+
+.blog-post {
+  margin-bottom: 4rem;
+}
+.blog-post-title {
+  margin-bottom: .25rem;
+  font-size: 2.5rem;
+}
+.blog-post-meta {
+  margin-bottom: 1.25rem;
+  color: #999;
+}
+
+
+/*
+ * Footer
+ */
+
+.blog-footer {
+  padding: 2.5rem 0;
+  color: #999;
+  text-align: center;
+  background-color: #f9f9f9;
+  border-top: .05rem solid #e5e5e5;
+}
+.blog-footer p:last-child {
+  margin-bottom: 0;
+}

source/scss/style.scss

@@ -0,0 +1,8 @@
+// ie9 is minimum supported by Bootstrap v4 and it doesn't support flexbox
+$enable-flex:               false;
+$enable-grid-classes:       true;
+
+// optional: import local styles first
+@import 'source/scss/main.scss';
+
+@import 'node_modules/bootstrap/scss/bootstrap.scss';