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

.settings-heading {
  display: flex;
  max-width: none;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.settings-intro {
  max-width: 37rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.settings-heading > p.settings-storage {
  position: relative;
  flex-shrink: 0;
  padding: 0.15rem 0 0.15rem 1.65rem;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.6;
}

.settings-storage > span {
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 1.1rem;
}

.settings-panel {
  min-width: 0;
  padding: clamp(1.15rem, 3vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: var(--surface);
  box-shadow: 0 4px 20px var(--shadow-soft);
}

.settings-section-heading {
  display: flex;
  align-items: start;
  gap: 0.85rem;
  margin-bottom: 1.4rem;
}

.settings-section-number {
  display: grid;
  width: 2.4rem;
  height: 2.4rem;
  flex-shrink: 0;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--surface-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.settings-section-heading h2 {
  margin-block: 0.1rem 0.4rem;
  color: var(--heading);
  font-size: 1.2rem;
  letter-spacing: -0.025em;
}

.settings-section-heading p {
  color: var(--muted);
  font-size: 0.87rem;
}

.settings-fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.theme-options {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}

.appearance-option {
  position: relative;
  display: block;
  min-width: 0;
  cursor: pointer;
}

.appearance-option > input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  overflow: hidden;
  clip-path: inset(50%);
}

.appearance-choice {
  position: relative;
  display: flex;
  height: 100%;
  flex-direction: column;
  padding: 0.6rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: var(--surface);
}

.appearance-option:hover .appearance-choice {
  border-color: var(--line-strong);
  background: var(--surface-hover);
}

.appearance-option > input:checked + .appearance-choice {
  border-color: var(--accent);
  background: var(--surface-soft);
  box-shadow: 0 0 0 1px var(--accent);
}

.appearance-option > input:focus-visible + .appearance-choice {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.settings-fieldset:disabled .appearance-option {
  cursor: default;
}

.choice-copy {
  display: flex;
  min-width: 0;
  overflow-wrap: anywhere;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.85rem 0.25rem 0.25rem;
}

.choice-copy strong {
  padding-inline-end: 1.65rem;
  color: var(--heading);
  font-size: 0.94rem;
  font-weight: 700;
  line-height: 1.35;
}

.choice-copy > span {
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
}

.choice-indicator {
  position: absolute;
  top: 8.9rem;
  right: 0.85rem;
  display: grid;
  width: 1.15rem;
  height: 1.15rem;
  place-items: center;
  border: 1px solid var(--input-line);
  border-radius: 50%;
  color: transparent;
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1;
}

.appearance-option > input:checked + .appearance-choice .choice-indicator {
  border-color: var(--action);
  background: var(--action);
  color: var(--on-action);
}

.system-theme-note {
  margin: auto 0.25rem 0;
  padding-top: 0.55rem;
  color: var(--accent);
  font-size: 0.72rem;
}

/* Fixed-colour miniatures represent each choice, independently of the active theme. */
.theme-mini {
  --mini-bg: #f5f4ef;
  --mini-surface: #fffefa;
  --mini-line: #d8dfd5;
  --mini-ink: #315446;
  --mini-cover: #d4e0cc;
  display: block;
  height: 7.5rem;
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid var(--mini-line);
  border-radius: 0.45rem;
  background: var(--mini-bg);
}

.theme-mini-night {
  --mini-bg: #151c20;
  --mini-surface: #202b30;
  --mini-line: #3c4c49;
  --mini-ink: #b0d2b1;
  --mini-cover: #3a5945;
}

.theme-mini-twilight {
  --mini-bg: #201c2d;
  --mini-surface: #30283f;
  --mini-line: #584766;
  --mini-ink: #cfb0e3;
  --mini-cover: #6f4d87;
}

.theme-mini-system {
  --mini-bg: linear-gradient(110deg, #f5f4ef 50%, #151c20 50%);
  --mini-surface: linear-gradient(110deg, #fffefa 50%, #202b30 50%);
  --mini-line: #7a8a7b;
  --mini-ink: #7a9b7d;
  --mini-cover: #54735b;
}

.mini-header {
  display: flex;
  height: 1.75rem;
  align-items: center;
  gap: 0.5rem;
  padding-inline: 0.5rem;
  border-bottom: 1px solid var(--mini-line);
  background: var(--mini-surface);
}

.mini-brand {
  margin-inline-end: auto;
  color: var(--mini-ink);
  font: 700 0.7rem Georgia, serif;
}

.mini-nav {
  width: 1rem;
  height: 2px;
  background: var(--mini-ink);
  opacity: 0.5;
}

.mini-content {
  display: block;
  padding: 0.65rem;
}

.mini-heading {
  display: block;
  width: 45%;
  height: 4px;
  margin-bottom: 0.55rem;
  border-radius: 1px;
  background: var(--mini-ink);
}

.mini-card {
  display: flex;
  height: 3.25rem;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem;
  border: 1px solid var(--mini-line);
  border-radius: 0.3rem;
  background: var(--mini-surface);
}

.mini-cover {
  display: grid;
  width: 1.6rem;
  height: 100%;
  flex-shrink: 0;
  place-items: center;
  border-radius: 0.15rem;
  background: var(--mini-cover);
  color: var(--mini-ink);
  font-size: 0.75rem;
}

.theme-mini-twilight .mini-cover {
  color: #d3b77e;
}

.mini-lines {
  display: grid;
  width: 100%;
  gap: 0.3rem;
}

.mini-lines > span {
  height: 2px;
  border-radius: 1px;
  background: var(--mini-ink);
  opacity: 0.4;
}

.mini-lines > span:first-child {
  width: 70%;
  opacity: 0.85;
}

.mini-lines > .mini-button {
  width: 30%;
  height: 5px;
  margin-left: auto;
  opacity: 0.8;
}

.settings-message {
  min-height: 1.5em;
  margin-top: 0.9rem;
  color: var(--accent);
  font-size: 0.8rem;
}

.settings-reading-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  align-items: start;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.font-options {
  display: grid;
  gap: 0.65rem;
}

.font-choice {
  flex-direction: row;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem;
}

.font-choice .choice-copy {
  padding: 0;
}

.font-choice .choice-copy strong {
  padding: 0;
}

.font-choice .choice-indicator {
  position: static;
  flex-shrink: 0;
  margin-left: auto;
}

.font-glyph {
  display: grid;
  width: 2.6rem;
  height: 2.6rem;
  flex-shrink: 0;
  place-items: center;
  color: var(--accent);
  font-size: 1.6rem;
}

.font-option-serif .font-glyph {
  font-family: Georgia, "DejaVu Serif", serif;
}

.font-option-sans .font-glyph {
  font-family: Arial, "Liberation Sans", sans-serif;
}

.font-option-rounded .font-glyph {
  font-family: "Trebuchet MS", Verdana, "DejaVu Sans", sans-serif;
}

.settings-preview {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: var(--surface);
  box-shadow: 0 4px 20px var(--shadow-soft);
}

.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.8rem;
}

.preview-toolbar > span:first-child {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.preview-theme {
  color: var(--accent);
  font-size: 0.75rem;
}

.preview-page {
  padding: clamp(1.25rem, 3vw, 2rem);
}

.preview-page h2 {
  margin-bottom: 1rem;
  color: var(--heading);
  font: 700 1.65rem/1.25 var(--reading-font);
}

.preview-page .reading-text {
  font-size: 1.05rem;
}

.preview-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  font-weight: 650;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

.settings-noscript {
  margin-bottom: 1.25rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--surface);
}

@media (max-width: 62rem) {
  .theme-options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 48rem) {
  .settings-heading {
    display: block;
  }

  .settings-heading > p.settings-storage {
    margin-top: 1rem;
  }

  .settings-storage br {
    display: none;
  }

  .settings-reading-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 30rem) {
  .theme-options {
    gap: 0.75rem;
  }

  .appearance-choice:not(.font-choice) {
    padding: 0.4rem;
  }

  .theme-mini {
    height: 6.5rem;
  }

  .mini-content {
    padding: 0.45rem;
  }

  .theme-options .choice-copy {
    padding-top: 2rem;
  }

  .theme-options .choice-copy strong {
    padding: 0;
    font-size: 0.85rem;
  }

  .theme-options .choice-copy > span {
    font-size: 0.75rem;
  }

  .theme-options .choice-indicator {
    top: 7.5rem;
    left: 0.65rem;
    right: auto;
  }

  .font-choice {
    gap: 0.55rem;
    padding: 0.75rem 0.6rem;
  }

  .font-glyph {
    width: 2rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .appearance-choice {
    transition: border-color 140ms ease-out, box-shadow 140ms ease-out;
  }
}

@media (forced-colors: active) {
  .appearance-option > input:checked + .appearance-choice {
    outline: 2px solid Highlight;
  }

  .appearance-option > input:checked + .appearance-choice .choice-indicator {
    color: Highlight;
  }
}