:root[data-theme="light"] {
  --bg: #f5f5f5;
  --surface: #ffffff;
  --fg: #16181c;
  --fg-muted: #5b626d;
  --border: #d9dde2;
  --accent: #0a5fd1;
}

:root[data-theme="dark"] {
  --bg: #11151a;
  --surface: #1a1f26;
  --fg: #e8eaed;
  --fg-muted: #9aa3ad;
  --border: #2c333c;
  --accent: #6cb0ff;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, sans-serif;
}

button {
  font: inherit;
  color: inherit;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  padding-top: max(0.5rem, env(safe-area-inset-top));
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar__actions {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
}

.bookmarks-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1 1 0;
  min-width: 0;
}

.bookmarks {
  display: flex;
  gap: 0.4rem;
  overflow: hidden;
  flex: 1 1 0;
  min-width: 0;
  position: relative;
}

.bookmarks__chip {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 0.3rem;
  padding: 0.3rem 0.65rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  white-space: nowrap;
  color: inherit;
  text-decoration: none;
}

.bookmarks__chip:hover {
  border-color: var(--accent);
}

.bookmarks__chip[aria-current="page"] {
  border-color: var(--accent);
  background: var(--bg);
  color: var(--accent);
  font-weight: 600;
}

.bookmarks__chip-name {
  color: var(--fg-muted);
}

.bookmarks__chip[aria-current="page"] .bookmarks__chip-name {
  color: var(--accent);
}

.bookmarks-menu {
  position: fixed;
  inset: auto;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--surface);
  color: var(--fg);
  padding: 0.4rem;
  width: min(18rem, calc(100vw - 2rem));
  max-height: min(24rem, calc(100vh - 2rem));
  overflow-y: auto;
}

.bookmarks-menu__item {
  display: flex;
  gap: 0.4rem;
  padding: 0.6rem 0.75rem;
  border-radius: 0.5rem;
  color: inherit;
  text-decoration: none;
}

.bookmarks-menu__item:hover {
  background: var(--bg);
}

.bookmarks-menu__item[aria-current="page"] {
  background: var(--bg);
  color: var(--accent);
  font-weight: 600;
}

.bookmarks-menu__item-name {
  color: var(--fg-muted);
}

.bookmarks-menu__item[aria-current="page"] .bookmarks-menu__item-name {
  color: var(--accent);
}

.zoom-reset {
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

#favorite-button[aria-pressed="true"] {
  color: var(--accent);
}

.viewer-wrap {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: safe center;
  padding: 0.75rem;
  overflow: auto;
  container-type: size;
}

.viewer {
  flex-shrink: 0;
  width: calc(min(100cqw, 100cqh * 720 / 432) * var(--zoom, 1));
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.viewer__subpage {
  position: relative;
  width: 100%;
  aspect-ratio: 720 / 432;
  background: #000;
  border-radius: 0.5rem;
  overflow: hidden;
  flex-shrink: 0;
}

.viewer__image {
  display: block;
  width: 100%;
  height: 100%;
}

.viewer__link {
  position: absolute;
  display: block;
}

.viewer__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.status {
  color: var(--fg-muted);
  text-align: center;
  margin: auto;
}

.bottombar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  padding-bottom: max(0.5rem, env(safe-area-inset-bottom));
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.bar-button {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  min-width: 3rem;
  min-height: 3rem;
  font-size: 1.25rem;
  cursor: pointer;
}

.bottombar__goto {
  flex: 1;
}

.bottombar__input {
  width: 100%;
  min-height: 3rem;
  text-align: center;
  font-size: 1.1rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-variant-numeric: tabular-nums;
}

.settings {
  border: none;
  border-radius: 1rem;
  background: var(--surface);
  color: var(--fg);
  padding: 1.25rem;
  width: min(22rem, calc(100vw - 2rem));
  box-shadow: 0 10px 40px rgb(0 0 0 / 0.25);
  opacity: 0;
  scale: 0.96;
  transition:
    opacity 0.15s ease,
    scale 0.15s ease,
    overlay 0.15s allow-discrete,
    display 0.15s allow-discrete;
}

.settings[open] {
  opacity: 1;
  scale: 1;
}

@starting-style {
  .settings[open] {
    opacity: 0;
    scale: 0.96;
  }
}

.settings::backdrop {
  background: rgb(0 0 0 / 0.4);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition:
    opacity 0.15s ease,
    overlay 0.15s allow-discrete,
    display 0.15s allow-discrete;
}

.settings[open]::backdrop {
  opacity: 1;
}

@starting-style {
  .settings[open]::backdrop {
    opacity: 0;
  }
}

.settings__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.settings__header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.settings__close {
  background: var(--bg);
  border: none;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  cursor: pointer;
}

.settings__close:hover {
  background: var(--border);
}

.settings__group {
  border: none;
  padding: 0;
  margin: 0 0 1rem;
}

.settings legend {
  color: var(--fg-muted);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0 0 0.5rem;
}

.settings__segmented {
  display: flex;
  gap: 0.2rem;
  background: var(--bg);
  border-radius: 0.65rem;
  padding: 0.25rem;
}

.settings__segment {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  background: none;
  border: none;
  border-radius: 0.5rem;
  padding: 0.55rem 0.4rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.settings__segment[aria-pressed="true"] {
  background: var(--surface);
  color: var(--fg);
  font-weight: 600;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.15);
}

.settings__source {
  display: block;
  text-align: center;
  margin-top: 0.25rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--fg-muted);
  text-decoration: none;
}

.settings__source:hover {
  color: var(--accent);
}

@media (width < 720px) {
  .bookmarks-row {
    flex: none;
    padding: 0.35rem 0.75rem;
    background: var(--surface);
    border-top: 1px solid var(--border);
  }

  #bookmarks-menu-button {
    min-width: 2.5rem;
    min-height: 0;
    height: 1.7rem;
    padding: 0;
    border-radius: 999px;
    font-size: 1rem;
    line-height: 1;
  }
}

@media (min-width: 720px) {
  .viewer-wrap {
    padding: 1.5rem;
  }

  .bottombar {
    width: fit-content;
    margin: 0 auto;
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
    border-radius: 0.5rem 0.5rem 0 0;
  }

  .bottombar__goto {
    flex: none;
    width: 6rem;
  }
}