/* Young Serif, Instrument Sans and Material Icons Round, served from this
 * origin instead of fonts.googleapis.com.
 *
 * These were <link> tags pointing at Google until the CSP went up. The tags
 * themselves were allowed - style-src and font-src both name the Google
 * hosts - but sw.js routes every cross-origin GET through
 * staleWhileRevalidate, which re-issues it as fetch(). A fetch() from inside
 * a worker answers to connect-src, and connect-src listed only
 * storage.googleapis.com. So the worker's copy of the request was refused,
 * the catch swallowed it, and the <link> got back Response.error().
 *
 * The visible symptom was the icons: a Material Icons span carries the glyph
 * name as its text ("wifi", "login", "info_outline"), so with no font to
 * form the ligature the visitor reads the names. The two text faces failed
 * in the same breath but only fell back to system sans and serif, which is
 * quieter and hid how long this had been broken.
 *
 * Widening connect-src would have fixed it, but only after the header
 * reached the server AND every installed worker was replaced - a worker
 * keeps the CSP its own script response carried at install time. Same-origin
 * files need neither: connect-src 'self' already covers them, so this works
 * under the policy that is live right now. It also means the museum's app
 * stops depending on Google being reachable, which matters in a building
 * where the wifi is the exhibit's problem too.
 *
 * Instrument Sans is a variable font: one file per subset covers 400-700,
 * which is why four weights point at two files. Subsets are latin and
 * latin-ext only - Google also offers cyrillic and greek, which this app has
 * no use for.
 *
 * To refresh: re-fetch the two stylesheets from Google with a modern browser
 * User-Agent (an old one gets .ttf instead of .woff2) and re-download the
 * url()s they name.
 */

/* Instrument Sans - variable, weights 400-700 */
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/instrument-sans-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/instrument-sans-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Young Serif - single weight */
@font-face {
  font-family: 'Young Serif';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/young-serif-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Young Serif';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/young-serif-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Material Icons Round.
 *
 * font-display is deliberately 'block' and not 'swap': these spans hold the
 * glyph name as text, so a swap period renders "signal_cellular_alt" across
 * the status bar before the font lands. Blocking shows nothing for that
 * moment instead, which is the lesser of the two. The file is local now, so
 * the moment is short.
 */
@font-face {
  font-family: 'Material Icons Round';
  font-style: normal;
  font-weight: 400;
  font-display: block;
  src: url('../fonts/material-icons-round.woff2') format('woff2');
}

.material-icons-round {
  font-family: 'Material Icons Round';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: 'liga';
  font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
}