:root {
  color-scheme: dark;
  --bg: #02070d;
  --panel: #07131e;
  --panel-2: #0b1d2a;
  --line: #1c3a50;
  --ink: #eef7ff;
  --muted: #91a8ba;
  --blue: #39a9ff;
  --cyan: #39ddd3;
  --green: #4ade80;
  --amber: #fbbf24;
  --danger: #fb7185;
  --shadow: 0 24px 80px rgba(0,0,0,.48);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--ink); }
body { min-height: 100vh; overflow: hidden; }
button, select, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; }

.local-viewer {
  height: 100vh;
  min-height: 0;
  display: grid;
  grid-template-rows: auto auto auto minmax(0,1fr) auto auto;
  background:
    radial-gradient(circle at 92% 4%, rgba(57,169,255,.12), transparent 30rem),
    var(--bg);
}

.local-viewer__topbar {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(7,19,30,.96);
}

.local-viewer__identity { min-width: 0; display: flex; align-items: center; gap: .8rem; }
.local-viewer__back {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: .7rem;
  background: var(--panel-2);
  text-decoration: none;
  font-size: 1.2rem;
}
.local-viewer__title { min-width: 0; }
.local-viewer__title strong,
.local-viewer__title span { display: block; }
.local-viewer__title strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.local-viewer__title span { margin-top: .12rem; color: var(--muted); font-size: .77rem; }

.local-viewer__badge {
  display: inline-flex;
  align-items: center;
  gap: .38rem;
  border: 1px solid rgba(74,222,128,.34);
  border-radius: 99px;
  padding: .28rem .58rem;
  color: #b7f7c9;
  background: rgba(74,222,128,.08);
  font-size: .74rem;
  font-weight: 850;
  white-space: nowrap;
}
.local-viewer__badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(74,222,128,.12); }

.local-viewer__actions { display: flex; gap: .42rem; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.local-viewer__actions a,
.local-viewer__actions button,
.local-viewer__tabs button,
.local-viewer__chapters button,
.local-viewer__controls button,
.local-viewer__controls select {
  min-height: 38px;
  border: 1px solid #25475f;
  border-radius: .62rem;
  padding: .4rem .68rem;
  color: #dbeafe;
  background: #0b1d2a;
  text-decoration: none;
  cursor: pointer;
}
.local-viewer__actions a:hover,
.local-viewer__actions button:hover,
.local-viewer__controls button:hover { border-color: var(--blue); }

.local-viewer__tabs {
  display: flex;
  gap: .5rem;
  padding: .55rem 1rem;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  background: #04101a;
}
.local-viewer__tabs button { white-space: nowrap; border-radius: 99px; color: var(--muted); background: transparent; }
.local-viewer__tabs button[aria-selected="true"] { border-color: var(--blue); color: var(--ink); background: rgba(57,169,255,.15); }

.local-viewer__chapters {
  display: flex;
  gap: .42rem;
  align-items: center;
  padding: .5rem 1rem;
  overflow-x: auto;
  border-bottom: 1px solid #132b3d;
  background: #030c14;
}
.local-viewer__chapters:empty { display: none; }
.local-viewer__chapters button { min-height: 32px; padding: .3rem .62rem; border-radius: 99px; color: var(--muted); background: transparent; font-size: .78rem; white-space: nowrap; }
.local-viewer__chapters button[data-active="true"] { color: var(--cyan); border-color: rgba(57,221,211,.5); background: rgba(57,221,211,.08); }

.local-viewer__stage {
  position: relative;
  min-height: 0;
  display: grid;
  place-items: center;
  padding: .85rem 4.3rem;
  overflow: hidden;
}
.local-viewer__stage figure { margin: 0; width: min(100%, 1500px); height: 100%; display: grid; place-items: center; }
.local-viewer__slide {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border-radius: .45rem;
  background: #fff;
  box-shadow: var(--shadow);
  user-select: none;
  -webkit-user-drag: none;
}
.local-viewer__stage.is-loading .local-viewer__slide { opacity: .72; }
.local-viewer__error {
  width: min(680px, 92%);
  padding: 1.4rem;
  border: 1px solid rgba(251,113,133,.4);
  border-radius: 1rem;
  background: rgba(251,113,133,.08);
  text-align: center;
}
.local-viewer__error[hidden] { display: none; }
.local-viewer__error strong { display: block; margin-bottom: .4rem; }
.local-viewer__error p { color: var(--muted); }
.local-viewer__error a { color: var(--cyan); font-weight: 850; }

.local-viewer__arrow {
  position: absolute;
  top: 50%;
  translate: 0 -50%;
  z-index: 2;
  width: 48px;
  height: 66px;
  border: 1px solid #294b63;
  border-radius: .85rem;
  background: rgba(7,19,30,.9);
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(0,0,0,.3);
}
.local-viewer__arrow:hover { border-color: var(--blue); background: rgba(11,29,42,.98); }
.local-viewer__arrow--prev { left: 1rem; }
.local-viewer__arrow--next { right: 1rem; }
.local-viewer__arrow:disabled { opacity: .35; cursor: not-allowed; }

.local-viewer__controls {
  display: grid;
  grid-template-columns: minmax(0,1fr) auto minmax(0,1fr);
  gap: 1rem;
  align-items: center;
  padding: .55rem 1rem;
  border-top: 1px solid var(--line);
  background: var(--panel);
}
.local-viewer__controls-group { display: flex; gap: .42rem; align-items: center; flex-wrap: wrap; }
.local-viewer__controls-group--right { justify-content: flex-end; }
.local-viewer__counter { text-align: center; }
.local-viewer__counter strong,
.local-viewer__counter span { display: block; }
.local-viewer__counter span { color: var(--muted); font-size: .75rem; }
.local-viewer__controls button[aria-pressed="true"] { border-color: var(--cyan); color: var(--cyan); background: rgba(57,221,211,.08); }
.local-viewer__controls label { color: var(--muted); font-size: .78rem; }
.local-viewer__controls select { margin-left: .3rem; }

.local-viewer__progress-wrap {
  display: grid;
  grid-template-columns: auto minmax(120px,1fr) auto;
  gap: .7rem;
  align-items: center;
  padding: .5rem 1rem;
  border-top: 1px solid #132b3d;
  background: #04101a;
  color: var(--muted);
  font-size: .74rem;
}
.local-viewer__progress { width: 100%; accent-color: var(--blue); cursor: pointer; }

.local-viewer__thumbs {
  display: flex;
  gap: .52rem;
  margin: 0;
  padding: .62rem 1rem;
  list-style: none;
  overflow-x: auto;
  background: #020a11;
  scrollbar-width: thin;
  scrollbar-color: #31546b transparent;
}
.local-viewer__thumbs button {
  position: relative;
  width: 114px;
  min-height: 0;
  padding: 0;
  overflow: hidden;
  border: 2px solid transparent;
  border-radius: .45rem;
  background: #081725;
  cursor: pointer;
}
.local-viewer__thumbs button[aria-current="true"] { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(57,169,255,.15); }
.local-viewer__thumbs img { display: block; width: 100%; aspect-ratio: 16/9; object-fit: cover; background: #fff; }
.local-viewer__thumbs span { position: absolute; right: .22rem; bottom: .18rem; border-radius: .28rem; padding: 0 .28rem; background: rgba(0,0,0,.78); color: #fff; font-size: .68rem; }

.local-viewer__toast {
  position: fixed;
  left: 50%;
  bottom: 5.3rem;
  z-index: 20;
  translate: -50% 16px;
  opacity: 0;
  pointer-events: none;
  border: 1px solid var(--line);
  border-radius: 99px;
  padding: .5rem .8rem;
  color: var(--ink);
  background: rgba(7,19,30,.96);
  box-shadow: 0 12px 35px rgba(0,0,0,.35);
  transition: opacity .2s, translate .2s;
  font-size: .82rem;
}
.local-viewer__toast.is-visible { opacity: 1; translate: -50% 0; }

.embedded-viewer .local-viewer { grid-template-rows: auto minmax(0,1fr) auto auto; }
.embedded-viewer .local-viewer__topbar,
.embedded-viewer .local-viewer__tabs { display: none; }
.embedded-viewer .local-viewer__chapters { min-height: 42px; }

@media (max-width: 900px) {
  .local-viewer__topbar { align-items: flex-start; flex-direction: column; }
  .local-viewer__actions { width: 100%; justify-content: flex-start; }
  .local-viewer__stage { padding-inline: 3.4rem; }
  .local-viewer__controls { grid-template-columns: 1fr auto; }
  .local-viewer__controls-group--right { display: none; }
}

@media (max-width: 620px) {
  .local-viewer__title span, .local-viewer__badge { display: none; }
  .local-viewer__actions a:nth-of-type(2), .local-viewer__actions button#copy-link { display: none; }
  .local-viewer__stage { padding: .55rem 2.55rem; }
  .local-viewer__arrow { width: 36px; height: 52px; font-size: 1.55rem; }
  .local-viewer__arrow--prev { left: .25rem; }
  .local-viewer__arrow--next { right: .25rem; }
  .local-viewer__controls { grid-template-columns: 1fr auto; padding: .48rem .65rem; }
  .local-viewer__controls button { padding-inline: .5rem; }
  .local-viewer__controls button[data-secondary-control] { display: none; }
  .local-viewer__progress-wrap { padding-inline: .65rem; }
  .local-viewer__thumbs { padding-inline: .65rem; }
  .local-viewer__thumbs button { width: 96px; }
}

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