CSS: Initial teeny-tiny changes towards tdf#139926

Since I keep procrastinating on the Online Help redesign,
let’s do it incrementally.

Change-Id: I2e7ebc1d3d9df8f6b7425dcae50464d463d7f0c3
(cherry picked from commit e694812962ffc63f54e130446a0cac49f048bca0)
Reviewed-on: https://gerrit.libreoffice.org/c/help/+/113600
Tested-by: Jenkins
Tested-by: Olivier Hallot <olivier.hallot@libreoffice.org>
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
diff --git a/help3xsl/default.css b/help3xsl/default.css
index 1970529..ce1dd77 100644
--- a/help3xsl/default.css
+++ b/help3xsl/default.css
@@ -155,21 +155,21 @@ pre,
.warning {
    display:flex;
    align-items: center;
    border-radius: 0 4px 4px 0;
    box-shadow: 0 2px 2px -2px rgba(0,0,0,0.2);
    border-radius: 2px;
    box-shadow: 0 2px 5px -3px rgb(0 0 0 / 10%);
    padding: 0.2em;
    margin-top: 15px;
}
.note {
    border-left: 3px solid #309048;
    border-left: 2px solid #309048;
    background-color: #d9f1dd;
}
.tip {
    border-left: 3px solid #0063b1;
    border-left: 2px solid #0063b1;
    background-color: #cde5f7;
}
.warning {
    border-left: 3px solid #ed8733;
    border-left: 2px solid #ed8733;
    background-color: #f6f1d2;
}
.noteicon, .notetext {
@@ -228,7 +228,7 @@ h6 {
p,
ol,
td {
    font-size: 1.17rem;
    font-size: 1.15rem;
    margin: 2px 0 2px 0;
}
h1 {
@@ -256,10 +256,10 @@ h6 {
}
.howtoget {
    background: #EBE7E9;
    border-left: 3px solid #4E4B55;
    border-radius: 0 4px 4px 0;
    box-shadow: 0 2px 2px -2px rgba(0,0,0,0.2);
    padding: 0.3em;
    border-left: 2px solid #4E4B55;
    border-radius: 2px;
    box-shadow: 0 2px 5px -3px rgb(0 0 0 / 10%);
    padding: 0.2em;
    display: flex;
    flex-direction: column;
}
@@ -450,7 +450,7 @@ aside input[type=checkbox]:checked ~ .contents-treeview {
    padding-left: 15px;
}
.index a {
    font-size: 16px;
    font-size: 15px;
    display: block;
}
.index .hidden {
@@ -578,7 +578,7 @@ li.disabled a {
    top: 0px;
}
.donation{
    background: linear-gradient(90deg, #4275b2 0%, #4eaa88 100%);
    border: 1px solid #f1c62a;
    border-radius: 2px;
    padding: 5px 10px;
    margin: auto;
@@ -593,7 +593,7 @@ li.disabled a {
    text-decoration: none;
}
.donation p {
    font-size:1.2rem;
    font-size:1rem;
    text-align: center;
}
#SearchFrame {
@@ -671,7 +671,7 @@ li.disabled a {
    padding: 0;
    margin: 0;
    list-style: none;
    font-size: 16px;
    font-size: 15px;
}
.contents-treeview {
    -moz-user-select: none;