diff --git a/main.c b/main.c
index 90d5601..ef3e7ea 100644
--- a/main.c
+++ b/main.c
@@ -312,18 +312,19 @@ enter_block(MD_BLOCKTYPE type, void *details, void *ctx_)
                                 (
                                     !raw_str(ctx, "<style>")
                                     || !raw_str(ctx, ctx->sa.s + ctx->css[i].offset)
-                                    || !raw_str(ctx, "</style>"))
-                                )
+                                    || !raw_str(ctx, "</style>")
+                                ))
                             return ERR_PARSER_ENTER_BLOCK;
                     }
-                } else if (!(ctx->options & OPT_NO_CSS)) {
+                } else {
                     for (int i = 0; i < 2; ++i) {
-                        if (ctx->css[i].file &&
+                        if ((i == 1 || !(ctx->options & OPT_NO_CSS))
+                                && ctx->css[i].file &&
                                 (
                                     !raw_str(ctx, "<link rel=\"stylesheet\" href=\"")
                                     || !escape_text(ctx, ctx->css[i].file, strlen(ctx->css[i].file))
-                                    || !raw_str(ctx, "\">"))
-                                )
+                                    || !raw_str(ctx, "\">")
+                                ))
                         return ERR_PARSER_ENTER_BLOCK;
                     }
                 }
@@ -1054,7 +1055,8 @@ static void
 help(void)
 {
     outh(" -a, --author AUTHOR          Set AUTHOR as author (in meta in footer)\n"
-         " -C, --no-css                 Do not use CSS\n"
+         " -C, --no-css                 Do not use CSS (still process --css if any)\n"
+         " -c, --css FILE               Add FILE as additional CSS\n"
          " -d, --destdir DIR            Write files into DIR\n"
          " -F, --footer FILE            Insert FILE as common footer\n"
          " -H, --header FILE            Insert FILE as common header\n"
@@ -1097,6 +1099,7 @@ main (int argc, char *argv[])
     struct option opts[] = {
         { "author",         required_argument,  NULL,   'a' },
         { "no-css",         no_argument,        NULL,   'C' },
+        { "css",            required_argument,  NULL,   'c' },
         { "destdir",        required_argument,  NULL,   'd' },
         { "footer",         required_argument,  NULL,   'F' },
         { "header",         required_argument,  NULL,   'H' },
@@ -1107,13 +1110,16 @@ main (int argc, char *argv[])
         { "title",          required_argument,  NULL,   't' },
         { NULL,             0,                  NULL,    0  },
     };
-    while ((c = getopt_long(argc, argv, "a:Cd:F:H:hIl:ot:", opts, NULL)) != -1) switch (c) {
+    while ((c = getopt_long(argc, argv, "a:Cc:d:F:H:hIl:ot:", opts, NULL)) != -1) switch (c) {
         case 'a':
             ctx.doc.author = optarg;
             break;
         case 'C':
             ctx.options |= OPT_NO_CSS;
             break;
+        case 'c':
+            ctx.css[1].file = optarg;
+            break;
         case 'd':
             destdir = optarg;
             break;
@@ -1182,7 +1188,7 @@ main (int argc, char *argv[])
         }
     }
 
-    if (!(ctx.options & OPT_NO_CSS)) {
+    if (!(ctx.options & OPT_NO_CSS) || ctx.css[1].file) {
         outs((ctx.options & OPT_INLINE_CSS) ? "Loading" : "Copying");
         outse(" CSS files...");
         for (int i = 0; i < 2; ++i) {