Remove bootstrap

assets/css/app.css

@@ -1,6 +1,92 @@
+/* Colours and type for the whole app. The values are the ones Bootstrap
+   gave the page before it was taken out, so nothing shifts. */
 :root {
-  --bs-body-font-family: Georgia, "Iowan Old Style", "Palatino Linotype",
-                         "Times New Roman", serif;
+  --font-body: Georgia, "Iowan Old Style", "Palatino Linotype",
+               "Times New Roman", serif;
+  --text: #212529;
+  --text-muted: rgb(33 37 41 / .75);
+  --background: #f8f9fa;
+  --link: #0d6efd;
+  --link-hover: #0a58ca;
+  --focus: #0d6efd;
+
+  -webkit-text-size-adjust: 100%;
+  text-size-adjust: 100%;
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  :root { scroll-behavior: smooth; }
+}
+
+*,
+*::before,
+*::after { box-sizing: border-box; }
+
+body {
+  margin: 0;
+  font-family: var(--font-body);
+  font-size: 1rem;
+  line-height: 1.5;
+  color: var(--text);
+  background: var(--background);
+  -webkit-tap-highlight-color: transparent;
+}
+
+h1, h2, h3, h4, h5, h6 {
+  margin: 0 0 .5rem;
+  font-weight: 500;
+  line-height: 1.2;
+}
+
+/* Headings grow with the viewport up to their full size on a wide screen. */
+h1 { font-size: calc(1.375rem + 1.5vw); }
+h2 { font-size: calc(1.325rem + .9vw); }
+h3 { font-size: calc(1.3rem + .6vw); }
+h4 { font-size: calc(1.275rem + .3vw); }
+h5 { font-size: 1.25rem; }
+h6 { font-size: 1rem; }
+
+@media (min-width: 1200px) {
+  h1 { font-size: 2.5rem; }
+  h2 { font-size: 2rem; }
+  h3 { font-size: 1.75rem; }
+  h4 { font-size: 1.5rem; }
+}
+
+p,
+ul,
+ol { margin: 0 0 1rem; }
+
+ul,
+ol { padding-left: 2rem; }
+
+:is(ul, ol) :is(ul, ol) { margin-bottom: 0; }
+
+/* Footnote callers sit above the line without pushing it apart. */
+sup {
+  position: relative;
+  top: -.5em;
+  font-size: .75em;
+  line-height: 0;
+  vertical-align: baseline;
+}
+
+a { color: var(--link); }
+a:hover { color: var(--link-hover); }
+
+/* One reading column: the full width less a gutter on anything narrower than
+   a laptop, and a measure that grows a step with the screen beyond that. */
+main {
+  margin: 1.5rem auto;
+  padding: 0 .75rem;
+}
+
+@media (min-width: 1200px) {
+  main { max-width: 760px; }
+}
+
+@media (min-width: 1400px) {
+  main { max-width: 880px; }
 }
 
 /* Only A-Z and a-z: the compiler puts a drop cap on a chapter only when it
@@ -16,7 +102,7 @@
    of a sentence reads as part of the text. */
 .v,
 .chapter-number a {
-  color: var(--bs-body-color);
+  color: var(--text);
   text-decoration: none;
 }
 
@@ -31,7 +117,7 @@
 
 .v:focus-visible,
 .chapter-number a:focus-visible {
-  outline: 2px solid var(--bs-primary);
+  outline: 2px solid var(--focus);
   outline-offset: 2px;
   border-radius: 2px;
 }
@@ -41,7 +127,7 @@
    is -- the way a printed Bible drops it. */
 .dropcap {
   float: left;
-  font-family: "Day Leaf Initials", var(--bs-body-font-family);
+  font-family: "Day Leaf Initials", var(--font-body);
   font-size: 5em;
   line-height: .8;
   margin: .06em .08em 0 0;
@@ -110,7 +196,7 @@
   gap: .4em;
   font-size: 2rem;
   font-weight: 400;
-  color: var(--bs-secondary-color);
+  color: var(--text-muted);
   margin: 5rem 0 .75rem;
 }
 
@@ -163,12 +249,12 @@
 
 .d {
   font-style: italic;
-  color: var(--bs-secondary-color);
+  color: var(--text-muted);
 }
 
 .footnotes {
   font-size: .875rem;
-  color: var(--bs-secondary-color);
+  color: var(--text-muted);
 }
 .footnotes-title { font-size: 1rem; }
 .marker { font-weight: 700; }
@@ -177,12 +263,7 @@
 .marker { font-variant-emoji: text; }
 
 .chapter,
-.v { scroll-margin-top: 4.5rem; }
-
-.reference .form-select {
-  width: auto;
-  padding-right: 2rem;
-}
+.v { scroll-margin-top: 1rem; }
 
 .index ul {
   list-style: none;
@@ -223,3 +304,47 @@
   -webkit-hyphens: manual;
   hyphens: manual;
 }
+
+.app-version {
+  margin: 3rem 0 .5rem;
+  text-align: center;
+}
+
+.app-version p {
+  margin: .25rem 0 0;
+  font-size: .875em;
+  color: var(--text-muted);
+}
+
+/* The page shown while the service worker installs. */
+.boot {
+  margin: 0 auto;
+  padding: 3rem .75rem;
+  text-align: center;
+}
+
+.boot p { color: var(--text-muted); }
+
+.spinner {
+  display: inline-block;
+  width: 2rem;
+  height: 2rem;
+  margin-bottom: 1rem;
+  border: .25em solid #6c757d;
+  border-right-color: transparent;
+  border-radius: 50%;
+  animation: spin .75s linear infinite;
+}
+
+@keyframes spin {
+  to { transform: rotate(360deg); }
+}
+
+.boot .boot-warning {
+  display: inline-block;
+  padding: 1rem;
+  color: #664d03;
+  background: #fff3cd;
+  border: 1px solid #ffe69c;
+  border-radius: .375rem;
+}