/*! HTML5 Boilerplate v9.0.1 | MIT License | https://html5boilerplate.com/ */

/* main.css 3.0.0 | MIT License | https://github.com/h5bp/main.css#readme */
/*
 * What follows is the result of much research on cross-browser styling.
 * Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal,
 * Kroc Camen, and the H5BP dev community and team.
 */

/* ==========================================================================
   Base styles: opinionated defaults
   ========================================================================== */

html {
  color: #222;
  font-size: 1em;
  line-height: 1.4;
}

/*
 * Remove text-shadow in selection highlight:
 * https://twitter.com/miketaylr/status/12228805301
 *
 * Customize the background color to match your design.
 */

::-moz-selection {
  background: #b3d4fc;
  text-shadow: none;
}

::selection {
  background: #b3d4fc;
  text-shadow: none;
}

/*
 * A better looking default horizontal rule
 */

hr {
  display: block;
  height: 1px;
  border: 0;
  border-top: 1px solid #ccc;
  margin: 1em 0;
  padding: 0;
}

/*
 * Remove the gap between audio, canvas, iframes,
 * images, videos and the bottom of their containers:
 * https://github.com/h5bp/html5-boilerplate/issues/440
 */

audio,
canvas,
iframe,
img,
svg,
video {
  vertical-align: middle;
}

/*
 * Remove default fieldset styles.
 */

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

/*
 * Allow only vertical resizing of textareas.
 */

textarea {
  resize: vertical;
}

/* ==========================================================================
   Author's custom styles
   ========================================================================== */

:root {
  --ink: #07060a;
  --ink-raised: #0d0a11;

  --gutter: clamp(0px, 2vw, 20px);
  --chrome-top: env(safe-area-inset-top, 0px);
  --chrome-bottom: env(safe-area-inset-bottom, 0px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  height: 100%;
  background: var(--ink);
}

body {
  margin: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--ink);
}

/* ==========================================================================
   Booklet scroller
   ========================================================================== */

.booklet {
  position: relative;
  z-index: 10;
  height: 100vh;
  height: 100dvh;
  overflow-x: hidden;
  overflow-y: auto;
  scroll-snap-type: y mandatory;
  overscroll-behavior-y: contain;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.booklet::-webkit-scrollbar {
  display: none;
}

.booklet:focus {
  outline: none;
}

.page {
  display: grid;
  place-items: center;
  height: 100vh;
  height: 100dvh;
  padding:
    var(--chrome-top)
    calc(env(safe-area-inset-right, 0px) + var(--gutter))
    var(--chrome-bottom)
    calc(env(safe-area-inset-left, 0px) + var(--gutter));
  scroll-snap-align: center;
  scroll-snap-stop: always;
}

.page__frame {
  position: relative;
  width: min(100%, calc((100vh - var(--chrome-top) - var(--chrome-bottom)) * 0.7049));
  width: min(100%, calc((100dvh - var(--chrome-top) - var(--chrome-bottom)) * 0.7049));
  aspect-ratio: 903 / 1281;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(200, 165, 90, 0.28);
  border-radius: 2px;
  background: var(--ink-raised);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 24px 60px -18px rgba(0, 0, 0, 0.95),
    0 8px 26px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(0, 0, 0, 0.6),
    0 0 46px rgba(200, 165, 90, 0.055);
  opacity: 0.72;
  transform: scale(0.99);
  transition:
    opacity 0.55s ease,
    transform 0.8s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.page.is-active .page__frame {
  opacity: 1;
  transform: scale(1);
}

/* Loading shimmer */
.page__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    110deg,
    transparent 25%,
    rgba(200, 165, 90, 0.09) 45%,
    transparent 65%
  );
  background-size: 250% 100%;
  animation: booklet-shimmer 1.8s linear infinite;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.page__frame.is-loaded::before {
  opacity: 0;
  animation: none;
}

.page__frame.is-error::before {
  display: none;
}

.page__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  -webkit-user-drag: none;
  user-select: none;
}

@keyframes booklet-shimmer {
  from {
    background-position: 150% 0;
  }

  to {
    background-position: -150% 0;
  }
}

/* ==========================================================================
   Slim scrollbar for mouse users
   ========================================================================== */
@media (pointer: fine) and (min-width: 700px) {
  .booklet {
    scrollbar-width: thin;
    scrollbar-color: rgba(200, 165, 90, 0.4) transparent;
  }

  .booklet::-webkit-scrollbar {
    display: block;
    width: 4px;
  }

  .booklet::-webkit-scrollbar-track {
    background: transparent;
  }

  .booklet::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(200, 165, 90, 0.4);
  }
}

/* ==========================================================================
   Motion preferences
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Helper classes
   ========================================================================== */

/*
 * Hide visually and from screen readers
 */

.hidden,
[hidden] {
  display: none !important;
}

/*
 * Hide only visually, but have it available for screen readers:
 * https://snook.ca/archives/html_and_css/hiding-content-for-accessibility
 *
 * 1. For long content, line feeds are not interpreted as spaces and small width
 *    causes content to wrap 1 word per line:
 *    https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe
 */

.visually-hidden {
  border: 0;
  clip: rect(0, 0, 0, 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
  /* 1 */
}

/*
 * Extends the .visually-hidden class to allow the element
 * to be focusable when navigated to via the keyboard:
 * https://www.drupal.org/node/897638
 */

.visually-hidden.focusable:active,
.visually-hidden.focusable:focus {
  clip: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  position: static;
  white-space: inherit;
  width: auto;
}

/*
 * Hide visually and from screen readers, but maintain layout
 */

.invisible {
  visibility: hidden;
}

/*
 * Clearfix: contain floats
 *
 * The use of `table` rather than `block` is only necessary if using
 * `::before` to contain the top-margins of child elements.
 */

.clearfix::before,
.clearfix::after {
  content: "";
  display: table;
}

.clearfix::after {
  clear: both;
}

/* ==========================================================================
   EXAMPLE Media Queries for Responsive Design.
   These examples override the primary ('mobile first') styles.
   Modify as content requires.
   ========================================================================== */

@media only screen and (min-width: 35em) {
  /* Style adjustments for viewports that meet the condition */
}

@media print,
  (-webkit-min-device-pixel-ratio: 1.25),
  (min-resolution: 1.25dppx),
  (min-resolution: 120dpi) {
  /* Style adjustments for high resolution devices */
}

/* ==========================================================================
   Print styles.
   Inlined to avoid the additional HTTP request:
   https://www.phpied.com/delay-loading-your-print-css/
   ========================================================================== */

@media print {
  *,
  *::before,
  *::after {
    background: #fff !important;
    color: #000 !important;
    /* Black prints faster */
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a,
  a:visited {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

  abbr[title]::after {
    content: " (" attr(title) ")";
  }

  /*
   * Don't show links that are fragment identifiers,
   * or use the `javascript:` pseudo protocol
   */
  a[href^="#"]::after,
  a[href^="javascript:"]::after {
    content: "";
  }

  pre {
    white-space: pre-wrap !important;
  }

  pre,
  blockquote {
    border: 1px solid #999;
    page-break-inside: avoid;
  }

  tr,
  img {
    page-break-inside: avoid;
  }

  p,
  h2,
  h3 {
    orphans: 3;
    widows: 3;
  }

  h2,
  h3 {
    page-break-after: avoid;
  }
}