:root {
  color-scheme: dark;
  --bg: #151515;
  --panel: #202020;
  --line: rgba(255, 255, 255, .16);
  --text: #f4f1ed;
  --muted: #b5b0aa;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; margin: 0; }

body {
  min-width: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.3 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button { font: inherit; }

.reader {
  display: grid;
  min-height: 100dvh;
  padding: 16px clamp(12px, 3vw, 36px) 22px;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 14px;
}

.reader-bar, .reader-controls {
  display: flex;
  min-width: 0;
  align-items: center;
}

.reader-bar { justify-content: space-between; }

.reader-brand {
  margin: 0;
  font: 600 13px/1 Georgia, serif;
  letter-spacing: .13em;
}

.reader-brand span { color: var(--muted); }
.page-indicator { margin: 0; color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }

.icon-button, .reader-button {
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.icon-button { width: 36px; height: 32px; font-size: 20px; line-height: 1; }
.reader-button { min-width: 104px; padding: 9px 12px; }
.icon-button:hover, .reader-button:hover { border-color: rgba(255,255,255,.52); background: rgba(255,255,255,.06); }
.icon-button:focus-visible, .reader-button:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.reader-button:disabled { opacity: .35; cursor: default; }

.book-stage {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 0;
  place-items: center;
  overflow: hidden;
}

.book { max-width: 100%; touch-action: pan-y; }
.book .stf__parent { margin: 0 auto; }

.flip-page {
  display: grid;
  width: 420px;
  height: 594px;
  overflow: hidden;
  background: #fff;
  place-items: center;
}

.flip-page[data-density="hard"] { background: #0b0b0b; }

.flip-page canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: #fff;
}

.page-loading { color: #6e6963; font: 12px/1 system-ui, sans-serif; }

.reader-message {
  position: absolute;
  inset: auto 50% 28px auto;
  width: min(440px, calc(100% - 24px));
  margin: 0;
  padding: 12px 14px;
  transform: translateX(50%);
  background: #431d1b;
  color: #fff;
  text-align: center;
}

.reader-controls { justify-content: center; gap: 12px; }

:fullscreen .reader { min-height: 100vh; }

@media (max-width: 700px) {
  .reader { padding: 12px 10px 16px; gap: 10px; }
  .flip-page { width: 320px; height: 453px; }
  .reader-button { min-width: 112px; }
}

@media (max-width: 380px) {
  .reader-brand { font-size: 11px; }
  .reader-button { min-width: 96px; }
}