:root {
  --bg: #E7ECF1;
  --surface: #F5F7F9;
  --ink: #18202B;
  --muted: #586474;
  --line: #CBD3DC;
  --mark: #F6D84A;
  --mark-ink: #18202B;
  --danger: #B3261E;
  --ui: "Atkinson Hyperlegible Next", system-ui, -apple-system, sans-serif;
  --read: "Literata", Georgia, serif;
  --ease: cubic-bezier(.2, .8, .2, 1);
  /* sheets follow the library palette, or the book theme while reading */
  --s-bg: var(--surface);
  --s-fg: var(--ink);
  --s-muted: var(--muted);
  --s-line: var(--line);
  --top: env(safe-area-inset-top, 0px);
  --bottom: env(safe-area-inset-bottom, 0px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161C;
    --surface: #1A2028;
    --ink: #E5E9EE;
    --muted: #98A3B0;
    --line: #2B333E;
    --mark: #E8C838;
    --danger: #FF8A80;
    color-scheme: dark;
  }
}
body.reading {
  --s-bg: color-mix(in srgb, var(--r-bg) 93%, var(--r-fg));
  --s-fg: var(--r-fg);
  --s-muted: color-mix(in srgb, var(--r-fg) 62%, var(--r-bg));
  --s-line: color-mix(in srgb, var(--r-fg) 16%, var(--r-bg));
  background: var(--r-bg);
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.45 var(--ui);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior: none;
}
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }
:focus-visible { outline: 2.5px solid color-mix(in srgb, var(--mark) 70%, var(--ink)); outline-offset: 2px; border-radius: 8px; }
.ic { width: 22px; height: 22px; flex: none; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 0 18px 0 14px; white-space: nowrap;
  border: 0; border-radius: 22px;
  font-weight: 600; font-size: 15px;
}
.btn-ink { background: var(--ink); color: var(--bg); }
.btn-ink:active, .btn-soft:active { transform: scale(.97); }
.btn-soft { background: var(--surface); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }
@media (max-width: 520px) {
  #store-btn, #add-btn { width: 44px; padding: 0; justify-content: center; }
  #store-btn .lbl, #add-btn .lbl { display: none; }
}
.icon-btn {
  display: inline-grid; place-items: center;
  width: 44px; height: 44px; border: 0; border-radius: 22px;
  background: transparent;
}
.icon-btn:active { background: color-mix(in srgb, currentColor 12%, transparent); }

/* ---------- Library ---------- */
.screen { min-height: 100%; }
#library {
  max-width: 1080px; margin: 0 auto;
  padding: calc(var(--top) + 20px) max(16px, env(safe-area-inset-right)) calc(var(--bottom) + 40px) max(16px, env(safe-area-inset-left));
}
.lib-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 8px 0 22px; }
.lib-actions { display: flex; align-items: center; gap: 10px; }
.avatar {
  display: inline-grid; place-items: center; flex: none;
  width: 44px; height: 44px; border: 0; border-radius: 50%; padding: 0;
  background: var(--mark); color: var(--mark-ink);
  font: 700 18px/1 var(--ui); text-transform: uppercase;
}
.avatar.big { width: 56px; height: 56px; font-size: 24px; }
.lib-head h1 {
  margin: 0; font: 600 34px/1.1 var(--read); letter-spacing: -.01em;
  font-variation-settings: "opsz" 72;
}

.continue-card {
  display: grid; grid-template-columns: 96px 1fr; gap: 18px; align-items: center;
  width: 100%; max-width: 640px; padding: 16px; margin-bottom: 28px;
  border: 0; border-radius: 18px; text-align: left;
  background: var(--surface);
  box-shadow: 0 1px 0 var(--line);
}
.continue-card .cover { width: 96px; }
.continue-card .c-label { margin: 0 0 4px; color: var(--muted); font-size: 14px; }
.continue-card h2 { margin: 0; font: 600 21px/1.2 var(--read); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.continue-card .c-author { margin: 4px 0 12px; color: var(--muted); font-size: 15px; }
.continue-card .c-meta { margin: 8px 0 0; font-size: 14px; color: var(--muted); }
@media (min-width: 700px) {
  .continue-card { grid-template-columns: 120px 1fr; padding: 20px; }
  .continue-card .cover { width: 120px; }
  .continue-card h2 { font-size: 26px; }
}

.install-banner {
  display: flex; align-items: center; gap: 12px; margin: -6px 0 22px; padding: 12px 6px 12px 14px;
  border-radius: 16px; background: var(--surface); box-shadow: 0 1px 0 var(--line);
}
.install-banner img { flex: none; border-radius: 10px; }
.install-banner p { flex: 1; min-width: 0; margin: 0; display: grid; gap: 2px; }
.install-banner strong { font-size: 15px; }
.install-banner span { font-size: 13px; color: var(--muted); }
.install-banner .btn { min-height: 38px; padding: 0 16px; }
.install-banner .icon-btn { color: var(--muted); width: 36px; }
.steps { margin: 0 0 22px; padding-left: 22px; display: grid; gap: 14px; font-size: 16px; line-height: 1.45; }
.inline-ic { width: 20px; height: 20px; vertical-align: -4px; color: #2F7BF6; }

.meter { height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.meter > span { display: block; height: 100%; background: var(--ink); border-radius: 2px; }

.shelf-title { margin: 0 0 14px; font: 600 15px/1.3 var(--ui); color: var(--muted); }
.shelf-title span { font-weight: 400; }
.shelf {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 24px 16px;
  grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));
}
@media (min-width: 600px) { .shelf { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 32px 24px; } }
.book { position: relative; }
.book-open { display: block; width: 100%; padding: 0; border: 0; background: none; text-align: left; }
.book-open:active .cover { transform: scale(.97); }
.book .b-title { margin: 10px 0 2px; font-size: 14px; font-weight: 600; line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.book .b-author { margin: 0; font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding-right: 30px; }
.book .meter { margin-top: 8px; height: 3px; }
.book .b-pct { margin: 5px 0 0; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.book-more { position: absolute; right: -10px; bottom: 26px; color: var(--muted); }

.cover {
  position: relative; aspect-ratio: 2 / 3; width: 100%;
  border-radius: 4px 8px 8px 4px; overflow: hidden;
  background: var(--line);
  box-shadow: 0 1px 2px rgb(0 0 0 / .18), 0 6px 16px -6px rgb(0 0 0 / .25);
  transition: transform .15s var(--ease);
}
.cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cover::after { content: ""; position: absolute; inset: 0 auto 0 0; width: 6px; background: linear-gradient(90deg, rgb(0 0 0 / .18), transparent); }
.gen-cover {
  display: flex; flex-direction: column; justify-content: space-between;
  height: 100%; padding: 14% 12%;
  background: var(--hue); color: #F4F1E8;
}
.gen-cover strong { font: 600 clamp(13px, 2.6vw, 17px)/1.18 var(--read); overflow-wrap: anywhere; display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; overflow: hidden; }
.gen-cover span { font-size: 11px; opacity: .8; }

.uploads { list-style: none; margin: 0 0 20px; padding: 0; display: grid; gap: 8px; }
.uploads li { padding: 12px 14px; border-radius: 12px; background: var(--surface); font-size: 14px; }
.uploads li .meter { margin-top: 8px; }
.uploads li.err { color: var(--danger); }

.empty { text-align: center; max-width: 420px; margin: 12vh auto 0; }
.empty-art { width: 160px; height: 120px; }
.ea-page { fill: var(--surface); stroke: var(--line); }
.ea-mark { fill: var(--mark); }
.ea-line { stroke: var(--line); stroke-width: 4; stroke-linecap: round; }
.empty h2 { font: 600 24px/1.2 var(--read); margin: 18px 0 8px; }
.empty p { color: var(--muted); margin: 0 0 24px; }
.empty-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }

.drop-overlay {
  position: fixed; inset: 0; z-index: 50; display: grid; place-items: center;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border: 3px dashed var(--ink); border-radius: 16px; margin: 10px;
}
.drop-overlay p { font: 600 22px var(--read); }

/* ---------- Free books ---------- */
.store {
  max-width: 1080px; margin: 0 auto;
  padding: 0 max(16px, env(safe-area-inset-right)) calc(var(--bottom) + 40px) max(16px, env(safe-area-inset-left));
}
.store-head {
  position: sticky; top: 0; z-index: 3; margin: 0 -16px 18px; padding: calc(var(--top) + 10px) 16px 12px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.store-top { display: flex; align-items: center; gap: 4px; margin-left: -10px; }
.store-top h1 { margin: 0; font: 600 28px/1.1 var(--read); font-variation-settings: "opsz" 72; }
.store .search { --s-line: var(--line); --s-bg: var(--surface); --s-fg: var(--ink); margin: 12px 0 10px; font-size: 16px; }
.chips { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; margin: 0 -16px; padding: 0 16px; }
.chips button {
  flex: none; min-height: 36px; padding: 0 14px; border: 1px solid var(--line); border-radius: 18px;
  background: var(--surface); font-size: 14px;
}
.chips button[aria-checked=true] { background: var(--ink); color: var(--bg); border-color: var(--ink); font-weight: 600; }
.store-status { color: var(--muted); margin: 0 0 16px; }
.store-status:empty { display: none; }
.store-book { display: flex; flex-direction: column; }
.store-book .b-author { padding-right: 0; margin-bottom: 10px; }
.get-btn {
  margin-top: auto; align-self: flex-start; min-height: 36px; padding: 0 16px; border: 0; border-radius: 18px;
  background: var(--mark); color: var(--mark-ink); font-weight: 700; font-size: 14px;
}
.get-btn.owned { background: var(--surface); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }
.get-btn:disabled { opacity: .7; }
.store-more { display: flex; margin: 28px auto 0; }
.store-credit { margin: 32px 0 0; text-align: center; font-size: 13px; color: var(--muted); }

/* ---------- Sign in ---------- */
.auth {
  display: grid; place-items: center; min-height: 100dvh;
  padding: calc(var(--top) + 24px) 16px calc(var(--bottom) + 24px);
}
.auth-card { width: 100%; max-width: 380px; }
.auth-logo { display: block; width: 64px; height: 64px; border-radius: 16px; }
.auth h1 { margin: 20px 0 6px; font: 600 32px/1.1 var(--read); font-variation-settings: "opsz" 72; }
.auth-sub { margin: 0 0 28px; color: var(--muted); }
.auth-seg { display: flex; margin-bottom: 20px; --s-bg: var(--surface); --s-fg: var(--ink); }
.auth-seg button { flex: 1; min-height: 40px; }
.auth .auth-seg button[aria-checked=true] { background: var(--ink); color: var(--bg); }
.field { display: grid; gap: 6px; margin-bottom: 14px; font-size: 14px; color: var(--muted); }
.field input {
  min-height: 50px; padding: 0 14px; border: 1px solid var(--line); border-radius: 12px;
  background: var(--surface); color: var(--ink); font-size: 17px;
}
.field input:focus-visible { outline-offset: 0; }
.auth-hint { margin: -4px 0 14px; font-size: 14px; color: var(--muted); }
.auth-error { margin: 0 0 14px; color: var(--danger); }
.auth-passkey { margin-top: 12px; }

/* Account: passkeys */
.acct-passkeys h3 { margin: 18px 0 4px; padding: 0 4px; font-size: 16px; }
.acct-passkeys > p { margin: 0 0 10px; padding: 0 4px; color: var(--s-muted); font-size: 14px; }
.pk-list { margin: 0; padding: 0; list-style: none; }
.pk-list li { display: flex; justify-content: space-between; align-items: center; gap: 12px; min-height: 54px; border-top: 1px solid var(--s-line); padding: 0 4px; }
.pk-list small { display: block; color: var(--s-muted); font-size: 13px; }
.pk-list button { border: 0; background: none; color: var(--danger); font-size: 15px; padding: 10px 0 10px 10px; }
.btn-block { width: 100%; justify-content: center; min-height: 52px; font-size: 16px; padding: 0 18px; }
.btn-block:disabled { opacity: .6; }

/* ---------- Reader ---------- */
#reader {
  position: fixed; inset: 0;
  background: var(--r-bg); color: var(--r-fg);
  touch-action: manipulation;
}
.view-host {
  position: absolute;
  inset: var(--top) env(safe-area-inset-right) var(--bottom) env(safe-area-inset-left);
}
.view-host foliate-view { display: block; width: 100%; height: 100%; }
#reader.pdf-dark foliate-view::part(filter) { filter: invert(1) hue-rotate(180deg); }

.r-bar {
  position: absolute; left: 0; right: 0; z-index: 5;
  background: color-mix(in srgb, var(--r-bg) 90%, var(--r-fg));
  -webkit-backdrop-filter: saturate(1.4) blur(16px); backdrop-filter: saturate(1.4) blur(16px);
  transition: transform .26s var(--ease), opacity .26s var(--ease);
}
.r-top {
  top: 0; display: flex; align-items: center; gap: 2px;
  padding: calc(var(--top) + 4px) max(6px, env(safe-area-inset-right)) 4px max(6px, env(safe-area-inset-left));
  border-bottom: 1px solid color-mix(in srgb, var(--r-fg) 10%, transparent);
}
.r-bottom {
  bottom: 0;
  padding: 10px max(20px, env(safe-area-inset-right)) calc(var(--bottom) + 10px) max(20px, env(safe-area-inset-left));
  border-top: 1px solid color-mix(in srgb, var(--r-fg) 10%, transparent);
}
#reader:not(.chrome) .r-top { transform: translateY(-100%); opacity: 0; pointer-events: none; }
#reader:not(.chrome) .r-bottom { transform: translateY(100%); opacity: 0; pointer-events: none; }
.r-title { flex: 1; min-width: 0; display: flex; flex-direction: column; padding: 0 6px; }
.r-title span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#r-book-title { font-weight: 600; font-size: 15px; }
#r-chapter { font-size: 13px; color: color-mix(in srgb, var(--r-fg) 62%, var(--r-bg)); }
.aa { font: 600 18px var(--read); }
.lang-chip {
  display: inline-flex; align-items: center; gap: 5px; height: 34px; padding: 0 12px 0 9px; margin-right: 2px;
  border: 1px solid color-mix(in srgb, var(--r-fg) 22%, transparent); border-radius: 17px;
  background: transparent; font-size: 13px; font-weight: 600; text-transform: uppercase;
}
.lang-chip .ic { width: 18px; height: 18px; }
.r-meta { display: flex; justify-content: space-between; margin-top: 6px; font-size: 13px; color: color-mix(in srgb, var(--r-fg) 62%, var(--r-bg)); font-variant-numeric: tabular-nums; }
input[type=range] { width: 100%; accent-color: var(--r-fg, var(--ink)); }
#r-progress { height: 28px; margin: 0; }

.r-mini {
  position: absolute; z-index: 2; left: 0; right: 0; bottom: calc(var(--bottom) + 10px);
  display: flex; justify-content: space-between; gap: 16px; padding: 0 max(22px, 6vw);
  font-size: 12px; color: color-mix(in srgb, var(--r-fg) 50%, var(--r-bg));
  pointer-events: none; transition: opacity .2s;
}
.r-mini span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#reader.chrome .r-mini, #reader.scrolled .r-mini { opacity: 0; }

.lk-pill {
  position: absolute; z-index: 6; left: 50%; bottom: calc(var(--bottom) + 22px);
  transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: 8px;
  height: 48px; padding: 0 22px 0 16px; border: 0; border-radius: 24px;
  background: var(--mark); color: var(--mark-ink);
  font-weight: 700; font-size: 16px;
  box-shadow: 0 6px 20px -4px rgb(0 0 0 / .35);
  animation: pill-in .22s var(--ease);
}
@keyframes pill-in { from { transform: translate(-50%, 16px); opacity: 0; } }

.r-loading { position: absolute; inset: 0; z-index: 4; display: grid; place-content: center; justify-items: center; gap: 14px; background: var(--r-bg); color: color-mix(in srgb, var(--r-fg) 62%, var(--r-bg)); }
.spinner { width: 28px; height: 28px; border-radius: 50%; border: 3px solid color-mix(in srgb, var(--r-fg) 15%, transparent); border-top-color: var(--r-fg); animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Sheets ---------- */
.scrim { position: fixed; inset: 0; z-index: 20; background: rgb(0 0 0 / .32); animation: fade .2s; }
@keyframes fade { from { opacity: 0; } }
.sheet {
  position: fixed; z-index: 21; left: 0; right: 0; bottom: 0;
  max-width: 600px; margin: 0 auto; max-height: min(82dvh, 760px);
  display: flex; flex-direction: column;
  background: var(--s-bg); color: var(--s-fg);
  border-radius: 22px 22px 0 0;
  box-shadow: 0 -10px 40px -10px rgb(0 0 0 / .35);
  transform: translateY(105%);
  transition: transform .3s var(--ease);
}
.sheet.tall { height: min(82dvh, 760px); }
.sheet.open { transform: none; }
.sheet.dragging { transition: none; }
.grip { flex: none; height: 26px; display: grid; place-items: center; cursor: grab; touch-action: none; }
.grip::before { content: ""; width: 38px; height: 5px; border-radius: 3px; background: var(--s-line); }
.sheet-body { overflow-y: auto; overscroll-behavior: contain; padding: 0 20px calc(var(--bottom) + 22px); }
.sheet-title { margin: 2px 0 16px; font: 600 22px/1.2 var(--read); }
.sheet-sub { margin: -10px 0 16px; color: var(--s-muted); font-size: 14px; }

/* Lookup */
.lk-head { display: flex; align-items: flex-start; gap: 8px; }
.lk-selection { flex: 1; min-width: 0; margin: 4px 0 0; font: 500 19px/1.45 var(--read); }
.lk-selection p { margin: 0; white-space: pre-line; }
.lk-selection p + p { margin-top: .6em; }
.lk-selection.long { font-size: 17px; font-weight: 400; padding-left: 14px; border-left: 4px solid var(--mark); border-radius: 2px; }
.lk-selection.long mark { background: none; color: inherit; padding: 0; }
.lk-selection mark {
  color: var(--mark-ink);
  background: linear-gradient(transparent 8%, var(--mark) 8%, var(--mark) 92%, transparent 92%);
  padding: 0 .15em; border-radius: 3px;
  -webkit-box-decoration-break: clone; box-decoration-break: clone;
}
.lk-tools { display: flex; margin: -6px -10px 0 0; color: var(--s-muted); }
.lk-langs {
  display: inline-flex; gap: 6px; margin: 10px 0 0; padding: 4px 0; border: 0; background: none;
  color: var(--s-muted); font-size: 14px;
}
.lk-langs #lk-to { color: var(--s-fg); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--s-line); }
.lk-translation { margin: 8px 0 4px; font: 600 26px/1.3 var(--read); font-variation-settings: "opsz" 36; overflow-wrap: anywhere; white-space: pre-line; }
.lk-translation.long { font: 400 18px/1.55 var(--read); }
.lk-translation.loading, .lk-explain.loading, .lk-ctx-tr.loading {
  color: transparent; border-radius: 6px; min-height: 1.3em;
  background: linear-gradient(90deg, var(--s-line) 0 40%, color-mix(in srgb, var(--s-line) 40%, transparent) 50%, var(--s-line) 60% 100%) 0 0 / 300% 100%;
  animation: shimmer 1.2s linear infinite;
}
.lk-translation.loading { width: 60%; }
@keyframes shimmer { to { background-position: -150% 0; } }
.lk-error { color: var(--danger); margin: 8px 0 0; }
.lk-sec { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--s-line); }
.lk-sec h3 { margin: 0 0 8px; font-size: 14px; font-weight: 600; color: var(--s-muted); }
.lk-sec p { margin: 0; }
.lk-explain { font: 400 17px/1.55 var(--read); }
.lk-orig { font: 400 16px/1.55 var(--read); color: var(--s-muted); }
.lk-orig mark { background: var(--mark); color: var(--mark-ink); border-radius: 2px; padding: 0 .1em; }
.lk-ctx-tr { margin-top: 8px !important; font: 400 17px/1.55 var(--read); }
.def-group + .def-group { margin-top: 12px; }
.def-pos { font-style: italic; font-family: var(--read); color: var(--s-muted); font-size: 15px; }
.def-group ol { margin: 4px 0 0; padding-left: 22px; }
.def-group li { margin: 4px 0; font-size: 15.5px; line-height: 1.45; }
.def-group li small { display: block; color: var(--s-muted); font-size: 14px; }
.lk-credit { margin: 20px 0 0; font-size: 12px; color: var(--s-muted); }

/* Appearance */
.themes { display: flex; gap: 10px; overflow-x: auto; padding: 4px 2px 10px; margin: 0 -2px 8px; scrollbar-width: none; }
.theme-swatch {
  flex: none; display: grid; justify-items: center; gap: 6px;
  border: 0; background: none; padding: 0; font-size: 12px; color: var(--s-muted);
}
.theme-swatch i {
  display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%;
  font: 600 18px var(--read); font-style: normal;
  box-shadow: inset 0 0 0 1px rgb(127 127 127 / .35);
}
.theme-swatch[aria-checked=true] i { box-shadow: inset 0 0 0 1px rgb(127 127 127 / .35), 0 0 0 2.5px var(--s-bg), 0 0 0 5px var(--s-fg); }
.theme-swatch[aria-checked=true] { color: var(--s-fg); font-weight: 600; }
.custom-colors { display: flex; gap: 20px; margin: 0 0 10px; }
.custom-colors label { display: flex; align-items: center; gap: 8px; font-size: 15px; }
.custom-colors input { width: 44px; height: 32px; padding: 0; border: 1px solid var(--s-line); border-radius: 8px; background: none; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 52px; border-top: 1px solid var(--s-line); }
.row-label { flex: none; font-size: 15px; }
.row:has(select) .row-label { flex: 0 1 auto; }
.row input[type=range] { max-width: 220px; accent-color: var(--s-fg); }
.row select { flex: 0 1 auto; min-width: 0; max-width: 55%; min-height: 36px; border: 1px solid var(--s-line); border-radius: 8px; background: var(--s-bg); padding: 0 8px; }
.seg { display: flex; padding: 3px; border-radius: 12px; background: color-mix(in srgb, var(--s-fg) 8%, transparent); overflow-x: auto; }
.seg button { border: 0; background: none; padding: 7px 11px; border-radius: 9px; font-size: 14px; white-space: nowrap; }
.seg button[aria-checked=true] { background: var(--s-bg); box-shadow: 0 1px 3px rgb(0 0 0 / .18); font-weight: 600; }
.stepper { display: flex; align-items: center; gap: 4px; }
.stepper button { width: 44px; height: 40px; border: 1px solid var(--s-line); border-radius: 10px; background: none; font-family: var(--read); }
.small-a { font-size: 14px; }
.big-a { font-size: 21px; }
.stepper output { min-width: 40px; text-align: center; font-variant-numeric: tabular-nums; }
.switch input { appearance: none; width: 48px; height: 28px; border-radius: 14px; background: var(--s-line); position: relative; transition: background .2s; margin: 0; }
.switch input::after { content: ""; position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgb(0 0 0 / .3); transition: transform .2s var(--ease); }
.switch input:checked { background: var(--s-fg); }
.switch input:checked::after { transform: translateX(20px); background: var(--s-bg); }

/* Contents */
.toc-list { list-style: none; margin: 0; padding: 0; }
.toc-list button {
  display: block; width: 100%; padding: 12px 8px 12px calc(8px + var(--depth, 0) * 18px);
  border: 0; border-bottom: 1px solid var(--s-line); background: none; text-align: left;
  font: 400 16px/1.35 var(--read);
}
.toc-list button[aria-current=true] { font-weight: 600; }
.toc-list button[aria-current=true]::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--mark); margin: 0 8px 1px 0; box-shadow: 0 0 0 1px color-mix(in srgb, var(--s-fg) 30%, transparent); }

/* Language */
.search { width: 100%; min-height: 44px; margin: 12px 0 4px; padding: 0 14px; border: 1px solid var(--s-line); border-radius: 12px; background: color-mix(in srgb, var(--s-fg) 4%, var(--s-bg)); }
.lang-list { list-style: none; margin: 0; padding: 0; }
.lang-list button {
  display: flex; align-items: center; gap: 10px; width: 100%; min-height: 50px; padding: 6px 4px;
  border: 0; border-bottom: 1px solid var(--s-line); background: none; text-align: left;
}
.lang-list .l-name { flex: 1; font-size: 16px; }
.lang-list .l-native { color: var(--s-muted); font-size: 14px; }
.lang-list .ic { color: var(--s-fg); visibility: hidden; }
.lang-list button[aria-selected=true] .ic { visibility: visible; }
.lang-list button[aria-selected=true] .l-name { font-weight: 600; }

/* Book options */
.bk-head { display: flex; gap: 16px; align-items: center; margin-bottom: 14px; }
.bk-cover { width: 64px; flex: none; }
.bk-head h2 { margin: 0; font: 600 19px/1.25 var(--read); }
.bk-head p { margin: 4px 0 0; color: var(--s-muted); font-size: 14px; }
.list-btn {
  display: flex; justify-content: space-between; align-items: center; width: 100%; min-height: 54px; padding: 0 4px;
  border: 0; border-top: 1px solid var(--s-line); background: none; text-align: left; font-size: 16px;
}
.list-btn span { color: var(--s-muted); }
.list-btn.danger { color: var(--danger); }

.toast {
  position: fixed; z-index: 40; left: 50%; bottom: calc(var(--bottom) + 24px); transform: translateX(-50%);
  max-width: calc(100% - 32px); padding: 12px 18px; border-radius: 14px;
  background: var(--ink); color: var(--bg); font-size: 15px;
  box-shadow: 0 8px 24px -8px rgb(0 0 0 / .4);
  animation: pill-in .22s var(--ease);
  pointer-events: none; /* text only; taps reach the Translate pill underneath */
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}