Stop using inline css, and reorganize static folder

share/static/css/404.css

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+body {
+    background-color: #FFC4D5;
+    color: #FF0048;
+    text-align: center;
+    font-size: 20em;
+}

share/static/css/denied.css

@@ -0,0 +1,7 @@
+body {
+  background-color: #222222;
+  color: #ffffff;
+  text-align: center;
+  font-family: sans-serif;
+  padding: 5em 1em;
+}

share/static/css/style.css

@@ -0,0 +1,88 @@
+.clearfix:after {
+    content: ".";
+    display: block;
+    clear: both;
+    visibility: hidden;
+    line-height: 0;
+    height: 0;
+}
+
+body {
+  margin: 0;
+  font-family: Helvetica;
+}
+
+header {
+  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
+  background: #fcfcfc;
+  background: -webkit-linear-gradient(top, #fcfcfc 0%, #f2f2f2 100%);
+  padding: 0.8rem;
+}
+
+header .logo {
+  vertical-align: middle;
+  width: 45px;
+  height: 45px;
+}
+
+header h1 {
+  display: inline-block;
+  margin: 0 0 0 0.5rem;
+  vertical-align: middle;
+  font-weight: normal;
+  font-size: 1.5rem;
+  color: #666666;
+}
+
+header .right {
+  float: right;
+  font-size: .75rem;
+}
+
+header .right ul li {
+  display: inline;
+  margin: 0 0 0 .5rem;
+  font-size: 1rem;
+}
+
+header .button {
+  color: #ffffff;
+  background-color: #4e064f;
+  padding: 10px;
+  border-radius: 5px;
+  text-decoration: none;
+  margin-left: 1rem;
+  cursor: pointer;
+}
+
+table.file-list {
+  width: 100%;
+  margin: 0 auto;
+  border-collapse: collapse;
+}
+
+table.file-list th {
+  text-align: left;
+  text-transform: uppercase;
+  font-weight: normal;
+  color: #666666;
+  padding: 0.5rem;
+}
+
+table.file-list tr {
+  border-bottom: 1px solid #e0e0e0;
+}
+
+table.file-list td {
+  white-space: nowrap;
+  padding: 0.5rem 10rem 0.5rem 0.8rem;
+}
+
+table.file-list td img {
+  vertical-align: middle;
+  margin-right: 0.5rem;
+}
+
+table.file-list td:last-child {
+  width: 100%;
+}