:root {
  color-scheme: light;
  --ink: #263246;
  --muted: #687189;
  --paper: #fff9ed;
  --violet: #7053a3;
  --violet-deep: #49346f;
  --gold: #e9a84c;
  --line: rgba(73, 52, 111, 0.16);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

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

body {
  display: grid;
  min-height: 100dvh;
  grid-template-rows: auto minmax(0, 1fr) auto;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 5%, rgba(255, 223, 144, 0.5), transparent 34rem),
    radial-gradient(circle at 90% 85%, rgba(112, 83, 163, 0.17), transparent 36rem),
    var(--paper);
}

a {
  color: var(--violet-deep);
  text-underline-offset: 0.18em;
}

button,
a {
  min-height: 44px;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  color: white;
  background: var(--violet-deep);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.reader-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: max(0.75rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) 0.75rem max(1rem, env(safe-area-inset-left));
  border-bottom: 1px solid var(--line);
  background: rgba(255, 249, 237, 0.88);
  backdrop-filter: blur(18px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
}

.wordmark span {
  display: grid;
  width: 2rem;
  min-height: 2rem;
  place-items: center;
  border-radius: 0.7rem;
  color: white;
  background: linear-gradient(135deg, var(--violet-deep), var(--violet));
  font-weight: 900;
}

.reader-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  justify-content: flex-end;
  font-size: 0.86rem;
  font-weight: 750;
}

.reader-header nav a {
  display: inline-flex;
  align-items: center;
}

.book-reader {
  display: grid;
  min-height: 0;
  place-items: center;
  padding: clamp(1rem, 3vw, 2.5rem);
}

.cover {
  width: min(100%, 58rem);
  padding: clamp(2rem, 8vw, 6rem);
  border: 1px solid var(--line);
  border-radius: clamp(1.5rem, 5vw, 3rem);
  text-align: center;
  background:
    radial-gradient(circle at 50% 28%, rgba(255, 246, 199, 0.96), transparent 22rem),
    linear-gradient(145deg, #ffd58f, #d77f72 58%, #73517f);
  box-shadow: 0 28px 80px rgba(63, 43, 78, 0.22);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--violet-deep);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.cover h1 {
  max-width: 12ch;
  margin: 0 auto 1rem;
  color: #fff9da;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.7rem, 9vw, 6rem);
  line-height: 0.98;
  text-shadow: 0 8px 26px rgba(66, 39, 70, 0.44);
}

.cover p:not(.eyebrow) {
  max-width: 44rem;
  margin: 0 auto 1.5rem;
  color: #fff9ed;
  font-size: clamp(1rem, 2.4vw, 1.25rem);
  line-height: 1.55;
}

button {
  padding: 0.65rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--violet-deep);
  background: rgba(255, 255, 255, 0.8);
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.primary-button {
  color: white;
  background: linear-gradient(135deg, var(--violet-deep), var(--violet));
  box-shadow: 0 10px 26px rgba(73, 52, 111, 0.24);
}

.page-view,
.page-view figure {
  display: grid;
  min-height: 0;
  margin: 0;
  place-items: center;
}

.page-view {
  width: 100%;
  height: 100%;
}

.page-view figure {
  gap: 0.7rem;
}

.page-view img {
  display: block;
  max-width: min(100%, 80rem);
  max-height: calc(100dvh - 14.5rem);
  border: 1px solid var(--line);
  border-radius: clamp(0.9rem, 2.5vw, 1.5rem);
  box-shadow: 0 22px 70px rgba(47, 35, 69, 0.2);
  object-fit: contain;
}

.page-view figcaption {
  max-width: 68ch;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

.reader-controls {
  display: grid;
  grid-template-columns: minmax(6rem, 1fr) auto minmax(6rem, 1fr);
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem max(1rem, env(safe-area-inset-right)) max(0.75rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  border-top: 1px solid var(--line);
  background: rgba(255, 249, 237, 0.9);
  backdrop-filter: blur(18px);
}

.reader-controls button:first-child {
  justify-self: end;
}

.reader-controls button:last-child {
  justify-self: start;
}

.reader-controls span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 750;
  text-align: center;
}

@media (max-width: 640px) {
  .reader-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .reader-header nav {
    width: 100%;
    justify-content: flex-start;
  }

  .cover {
    padding: 2.25rem 1.25rem;
  }

  .cover h1 {
    font-size: clamp(2.4rem, 14vw, 4rem);
  }

  .page-view img {
    max-height: calc(100dvh - 15rem);
  }

  .reader-controls {
    grid-template-columns: 1fr auto 1fr;
    gap: 0.4rem;
  }

  .reader-controls button {
    padding-inline: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}