/*
 * Skimbold Reader. Tokens and components come from ../shared/theme.css; the
 * reading variables below are set by reader.js from the reader settings.
 */

:root {
  --rd-size: 20px;
  --rd-leading: 1.7;
  --rd-measure: 680px;
  --rd-font: var(--skb-font-read);
  --rd-weight: 700;
  --rd-rest: 100%;
  --rd-bar-h: 56px;
  --rd-gutter: max(var(--skb-space-4), env(safe-area-inset-left), env(safe-area-inset-right));
  scroll-padding-top: calc(var(--rd-bar-h) + var(--skb-space-4));
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

[hidden] {
  display: none !important;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
}

/* ── Skip link ──────────────────────────────────────────────────────────── */

.rd-skip {
  position: absolute;
  top: -60px;
  left: var(--skb-space-3);
  z-index: 30;
}

.rd-skip:focus {
  top: var(--skb-space-2);
}

/* ── Top bar ────────────────────────────────────────────────────────────── */

.rd-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--skb-paper) 90%, transparent);
  -webkit-backdrop-filter: saturate(1.3) blur(12px);
  backdrop-filter: saturate(1.3) blur(12px);
  transition: border-color var(--skb-dur) var(--skb-ease);
}

.rd-bar.is-scrolled {
  border-bottom-color: var(--skb-line);
}

.rd-bar__row {
  display: flex;
  align-items: center;
  gap: var(--skb-space-2);
  height: var(--rd-bar-h);
  padding: 0 var(--rd-gutter);
}

.rd-brand {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: var(--skb-space-2);
  min-height: 40px;
  margin-left: -6px;
  padding: 0 var(--skb-space-2) 0 6px;
  border: 0;
  border-radius: var(--skb-radius-md);
  background: none;
  color: var(--skb-ink);
  cursor: pointer;
  transition: background-color var(--skb-dur) var(--skb-ease);
}

.rd-brand:hover {
  background: var(--skb-surface-sunk);
}

.rd-brand img {
  display: block;
  border-radius: 7px;
}

.rd-brand__name {
  font-size: 20px;
  line-height: 1;
}

.rd-brand__sub {
  padding-left: var(--skb-space-2);
  border-left: 1px solid var(--skb-line-strong);
  color: var(--skb-ink-soft);
  font: 500 var(--skb-text-sm) / 1 var(--skb-font-ui);
}

.rd-bar__title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  padding: 0 var(--skb-space-4);
  overflow: hidden;
  color: var(--skb-ink-soft);
  font-size: var(--skb-text-sm);
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rd-bar__actions {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--skb-space-1);
  margin-left: auto;
}

.rd-tool {
  padding: 0 var(--skb-space-3);
}

.rd-bar__sep {
  width: 1px;
  height: 22px;
  margin: 0 var(--skb-space-2);
  background: var(--skb-line);
}

.rd-bold {
  gap: var(--skb-space-2);
  min-height: 36px;
  padding: 0 var(--skb-space-2);
  border-radius: var(--skb-radius-md);
  font-weight: 600;
}

.rd-bold:has(> input:focus-visible) {
  outline: 2px solid var(--skb-focus);
  outline-offset: 0;
}

.rd-bold > input:focus-visible {
  outline: none;
}

.rd-aa {
  font: 600 18px / 1 var(--skb-font-read);
  letter-spacing: -0.02em;
}

.rd-aa[aria-expanded="true"] {
  background: var(--skb-surface-sunk);
}

/* Loading progress along the bottom edge of the bar. */
.rd-progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.rd-progress__fill {
  width: 0;
  height: 100%;
  background: var(--skb-accent);
  transition: width var(--skb-dur) linear;
}

.rd-progress.is-busy .rd-progress__fill {
  width: 30%;
  animation: rd-busy 1.1s var(--skb-ease) infinite;
}

@keyframes rd-busy {
  from { transform: translateX(-100%); }
  to { transform: translateX(340%); }
}

/* Without motion, a steady half-strength bar says "working". */
@media (prefers-reduced-motion: reduce) {
  .rd-progress.is-busy .rd-progress__fill {
    width: 100%;
    opacity: 0.5;
    animation: none;
  }
}

.rd-main:focus {
  outline: none;
}

/* ── Text and display panel ─────────────────────────────────────────────── */

.rd-panel {
  position: fixed;
  inset: calc(var(--rd-bar-h) + 6px) max(var(--skb-space-3), env(safe-area-inset-right)) auto auto;
  width: min(360px, calc(100vw - 2 * var(--skb-space-3)));
  max-height: calc(100dvh - var(--rd-bar-h) - var(--skb-space-5));
  margin: 0;
  padding: var(--skb-space-4) var(--skb-space-5) var(--skb-space-5);
  overflow: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--skb-line);
  border-radius: var(--skb-radius-lg);
  background: var(--skb-surface);
  color: var(--skb-ink);
  box-shadow: var(--skb-shadow-2);
  opacity: 1;
  transform: none;
  transition:
    opacity var(--skb-dur) var(--skb-ease),
    transform var(--skb-dur) var(--skb-ease),
    overlay var(--skb-dur) allow-discrete,
    display var(--skb-dur) allow-discrete;
}

.rd-panel:not(:popover-open) {
  opacity: 0;
  transform: translateY(-4px);
}

@starting-style {
  .rd-panel:popover-open {
    opacity: 0;
    transform: translateY(-4px);
  }
}

.rd-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 -6px var(--skb-space-2) 0;
}

.rd-panel__title {
  margin: 0;
  font-size: var(--skb-text-lg);
  font-weight: 600;
}

.rd-panel__group {
  display: grid;
  gap: var(--skb-space-4);
  padding: var(--skb-space-4) 0;
}

.rd-panel__group + .rd-panel__group {
  border-top: 1px solid var(--skb-line);
}

.rd-panel__group:last-child {
  padding-bottom: 0;
}

.rd-panel__shared {
  margin: calc(-1 * var(--skb-space-2)) 0 0;
}

.rd-swatch {
  flex: none;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border: 1px solid var(--skb-line-strong);
  border-radius: 50%;
}

.rd-swatch--auto { background: linear-gradient(135deg, #F2F4EF 50%, #141C18 50%); }
.rd-swatch--light { background: #F2F4EF; }
.rd-swatch--sepia { background: #F4ECDC; }
.rd-swatch--dark { background: #141C18; }

.skb-seg > label.rd-font-serif {
  font-family: var(--skb-font-read);
  font-size: var(--skb-text-md);
}

.skb-seg > label.rd-font-sans {
  font-family: var(--skb-font-ui);
}

.rd-size {
  align-items: center;
}

.rd-size > .rd-stepper {
  grid-row: 1;
  grid-column: 2;
}

.rd-stepper {
  display: flex;
  align-items: center;
  gap: var(--skb-space-1);
}

.rd-stepper__value {
  min-width: 52px;
  color: var(--skb-ink);
  font-size: var(--skb-text-sm);
  font-variant-numeric: tabular-nums;
  text-align: center;
}

/* ── Start page ─────────────────────────────────────────────────────────── */

.rd-home {
  padding: clamp(var(--skb-space-8), 9vh, 88px) var(--rd-gutter) var(--skb-space-12);
}

.rd-home__inner {
  max-width: 640px;
  margin: 0 auto;
}

.rd-home__title {
  margin: 0 0 var(--skb-space-3);
  font: 400 clamp(29px, 4.6vw, 40px) / 1.15 var(--skb-font-read);
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.rd-home__title:focus {
  outline: none;
}

.rd-home__lead {
  max-width: 34em;
  margin: 0 0 var(--skb-space-8);
  color: var(--skb-ink-soft);
  font: 400 clamp(17px, 2.2vw, 19px) / 1.55 var(--skb-font-read);
  text-wrap: pretty;
}

.rd-home .skb-rb {
  font-weight: var(--rd-weight);
}

.rd-home__lead .skb-rb {
  color: inherit;
}

.rd-message {
  margin: 0 0 var(--skb-space-6);
}

.rd-message:focus {
  outline: none;
}

.rd-notice {
  font-size: var(--skb-text-md);
}

.rd-notice--busy {
  color: var(--skb-ink-soft);
}

.rd-notice p {
  margin: 0;
}

.rd-notice__title {
  font-weight: 600;
}

.rd-notice__text {
  margin-top: 2px;
}

.rd-notice__title + .rd-notice__text,
.rd-notice > * + .rd-password,
.rd-notice__actions {
  margin-top: var(--skb-space-3) !important;
}

.rd-notice__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--skb-space-2);
}

.rd-password {
  display: grid;
  gap: 6px;
}

.rd-password__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--skb-space-2);
}

.rd-password__row > .skb-input {
  flex: 1 1 180px;
  width: auto;
}

/* Continue where you left off */
.rd-continue {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--skb-space-4);
  margin: 0 0 var(--skb-space-5);
  padding: var(--skb-space-4) var(--skb-space-5);
  overflow: hidden;
}

.rd-continue::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: var(--rd-read, 0%);
  height: 3px;
  background: var(--skb-accent);
}

.rd-continue__text {
  min-width: 0;
}

.rd-continue__text p {
  margin: 0;
}

.rd-continue__label {
  color: var(--skb-accent-ink);
  font-size: var(--skb-text-xs);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.rd-continue__title {
  margin-top: 2px !important;
  overflow: hidden;
  font: 600 var(--skb-text-lg) / 1.35 var(--skb-font-read);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rd-continue__meta {
  margin-top: 2px !important;
  font-size: var(--skb-text-sm);
}

.rd-continue__actions {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--skb-space-2);
}

/* The paste and drop box */
.rd-drop {
  border: 1.5px dashed var(--skb-line-strong);
  border-radius: var(--skb-radius-lg);
  background: var(--skb-surface);
  transition: border-color var(--skb-dur) var(--skb-ease), box-shadow var(--skb-dur) var(--skb-ease);
}

.rd-drop:focus-within {
  border-style: solid;
  border-color: var(--skb-accent);
  box-shadow: 0 0 0 3px var(--skb-accent-tint);
}

.rd-drop__input {
  display: block;
  width: 100%;
  min-height: 176px;
  margin: 0;
  padding: var(--skb-space-5) var(--skb-space-5) var(--skb-space-2);
  border: 0;
  border-radius: var(--skb-radius-lg) var(--skb-radius-lg) 0 0;
  background: transparent;
  color: var(--skb-ink);
  font: 400 var(--skb-text-xl) / 1.6 var(--skb-font-read);
  resize: vertical;
}

/* The box around it carries the focus ring. */
.rd-drop__input:focus-visible {
  outline: none;
}

.rd-drop__input::placeholder {
  color: var(--skb-ink-soft);
  opacity: 1;
}

.rd-drop__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--skb-space-3);
  padding: var(--skb-space-3) var(--skb-space-3) var(--skb-space-3) var(--skb-space-5);
}

/* Stays at the right edge when the bar wraps on a phone. */
.rd-drop__bar > .skb-btn--primary {
  margin-left: auto;
}

.rd-drop__hint {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--skb-space-2);
  margin: 0;
  color: var(--skb-ink-soft);
  font-size: var(--skb-text-sm);
}

.rd-drop__hint > svg {
  flex: none;
  width: 18px;
  height: 18px;
}

.rd-home__formats {
  margin: var(--skb-space-3) 0 0;
  font-size: var(--skb-text-sm);
}

.rd-keys {
  display: flex;
  flex-wrap: wrap;
  gap: var(--skb-space-2) var(--skb-space-5);
  margin: var(--skb-space-8) 0 0;
  padding: 0;
  font-size: var(--skb-text-sm);
  list-style: none;
}

@media (hover: none) and (pointer: coarse) {
  .rd-keys {
    display: none;
  }
}

/* ── The document ───────────────────────────────────────────────────────── */

.rd-doc {
  --rd-pad: clamp(20px, 5vw, 40px);
  width: 100%;
  max-width: calc(var(--rd-measure) + 2 * var(--rd-pad));
  margin: 0 auto;
  padding: clamp(var(--skb-space-6), 6vh, var(--skb-space-12)) var(--rd-pad) 40vh;
  color: var(--skb-ink);
  font-family: var(--rd-font);
  font-size: var(--rd-size);
  line-height: var(--rd-leading);
  font-kerning: normal;
  overflow-wrap: break-word;
}

/* Focus lands here so screen readers start at the text; there is nothing to operate. */
.rd-doc:focus {
  outline: none;
}

.rd-doc__head {
  margin: 0 0 2.2em;
  padding-bottom: var(--skb-space-3);
  border-bottom: 1px solid var(--skb-line);
  font-family: var(--skb-font-ui);
  line-height: 1.4;
}

.rd-doc__head p {
  margin: 0;
}

.rd-doc__title {
  overflow: hidden;
  color: var(--skb-ink);
  font-size: var(--skb-text-md);
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rd-doc__meta {
  margin-top: 2px !important;
  color: var(--skb-ink-soft);
  font-size: var(--skb-text-sm);
}

.rd-sec {
  content-visibility: auto;
  contain-intrinsic-size: auto 1200px;
}

.rd-doc__body :is(p, ul, ol, blockquote, pre) {
  margin: 0 0 1em;
}

.rd-doc__body :is(h1, h2, h3, h4, h5, h6) {
  margin: 1.7em 0 0.55em;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.rd-doc__body h1 { font-size: 1.75em; }
.rd-doc__body h2 { font-size: 1.4em; }
.rd-doc__body h3 { font-size: 1.2em; }
.rd-doc__body :is(h4, h5, h6) { font-size: 1.05em; }

.rd-doc__body .rd-sec:first-child > :first-child {
  margin-top: 0;
}

.rd-doc__body :is(ul, ol) {
  padding-left: 1.4em;
}

.rd-doc__body li {
  margin: 0 0 0.35em;
  padding-left: 0.2em;
}

.rd-doc__body li::marker {
  color: var(--skb-ink-soft);
}

.rd-doc__body li.rd-li-more {
  list-style: none;
}

.rd-doc__body blockquote {
  padding: 0 0 0 1em;
  border-left: 3px solid var(--skb-line-strong);
}

.rd-doc__body blockquote > p:last-child {
  margin-bottom: 0;
}

.rd-doc__body hr {
  width: 36%;
  height: 1px;
  margin: 2.2em auto;
  border: 0;
  background: var(--skb-line);
}

.rd-code {
  padding: 0.9em 1.1em;
  border-radius: var(--skb-radius-md);
  background: var(--skb-surface-sunk);
  font: 400 0.78em / 1.6 ui-monospace, 'Cascadia Mono', 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  tab-size: 4;
}

.rd-note {
  color: var(--skb-ink-soft);
  font: italic 400 var(--skb-text-sm) / 1.5 var(--skb-font-ui);
}

.rd-page {
  display: flex;
  align-items: center;
  gap: var(--skb-space-3);
  margin: 2.4em 0 1.6em !important;
  color: var(--skb-ink-soft);
  font: 500 var(--skb-text-xs) / 1 var(--skb-font-ui);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.rd-page::before,
.rd-page::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--skb-line);
}

/* Bold word starts, and the optional fade of the rest of each word. */
.skb-rb {
  font-weight: var(--rd-weight);
}

.rd-doc__body :is(p, li, h1, h2, h3, h4, h5, h6):not(.rd-note, .rd-page) {
  color: color-mix(in srgb, var(--skb-ink) var(--rd-rest), transparent);
}

.rd-doc__body .skb-rb {
  color: var(--skb-ink);
}

:root[data-bold="off"] .skb-rb {
  font-weight: inherit;
}

:root[data-bold="off"] .rd-doc__body :is(p, li, h1, h2, h3, h4, h5, h6):not(.rd-note, .rd-page) {
  color: var(--skb-ink);
}

.rd-doc__loading {
  margin: 1.5em 0 0;
  color: var(--skb-ink-soft);
  font: 400 var(--skb-text-sm) / 1.5 var(--skb-font-ui);
  text-align: center;
}

.rd-doc__end {
  margin-top: 3.5em;
  padding-top: var(--skb-space-6);
  border-top: 1px solid var(--skb-line);
  font-family: var(--skb-font-ui);
  line-height: 1.4;
  text-align: center;
}

.rd-doc__end-mark {
  margin: 0 0 var(--skb-space-4);
  color: var(--skb-ink-soft);
  font-size: var(--skb-text-sm);
}

.rd-doc__end-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--skb-space-2);
}

/* ── Drag and drop, file input ──────────────────────────────────────────── */

.rd-dropzone {
  position: fixed;
  inset: var(--skb-space-3);
  z-index: 40;
  display: grid;
  place-items: center;
  border: 2px dashed var(--skb-accent);
  border-radius: var(--skb-radius-lg);
  background: color-mix(in srgb, var(--skb-paper) 90%, transparent);
  pointer-events: none;
}

.rd-dropzone__label {
  margin: 0;
  color: var(--skb-accent-ink);
  font: 400 var(--skb-text-3xl) / 1.2 var(--skb-font-read);
}

.rd-file {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* ── Narrow screens ─────────────────────────────────────────────────────── */

@media (max-width: 760px) {
  .rd-bar__title {
    visibility: hidden;
  }
}

@media (max-width: 640px) {
  .rd-brand__sub {
    display: none;
  }

  .rd-tool {
    width: 36px;
    padding: 0;
  }

  .rd-tool__label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  /* The column already fills the screen, so a longer line has no effect. */
  .rd-width-field {
    display: none;
  }

  .rd-continue {
    flex-direction: column;
    align-items: stretch;
  }

  .rd-continue__actions {
    justify-content: space-between;
  }

  /* The panel becomes a sheet along the bottom edge, within reach of a thumb. */
  .rd-panel {
    inset: auto 0 0 0;
    width: 100%;
    max-height: 82dvh;
    padding-bottom: calc(var(--skb-space-5) + env(safe-area-inset-bottom));
    border-width: 1px 0 0;
    border-radius: var(--skb-radius-lg) var(--skb-radius-lg) 0 0;
  }

  .rd-panel:not(:popover-open) {
    transform: translateY(24px);
  }

  @starting-style {
    .rd-panel:popover-open {
      transform: translateY(24px);
    }
  }

  .rd-panel::backdrop {
    background: rgb(0 0 0 / 0.25);
  }
}

@media (max-width: 420px) {
  .rd-brand__name,
  .rd-bar__sep {
    display: none;
  }

  .rd-drop__input {
    min-height: 150px;
    font-size: var(--skb-text-lg);
  }

  .rd-drop__bar {
    padding-left: var(--skb-space-4);
  }
}

/* ── Print: just the text ───────────────────────────────────────────────── */

@media print {
  .rd-bar,
  .rd-home,
  .rd-panel,
  .rd-skip,
  .rd-doc__end,
  .rd-doc__loading,
  .rd-dropzone {
    display: none !important;
  }

  body {
    background: #fff;
  }

  .rd-doc {
    max-width: none;
    padding: 0;
    color: #000;
  }

  .rd-sec {
    content-visibility: visible;
  }
}