:root {
  --cream: #faf8f2;
  --paper: #fefdf8;
  --ink: #2c2a4a;
  --ink-soft: #4a4a4a;
  --border: #9a9a9a;
  --border-soft: #cfcac0;
  --shadow: rgba(30, 25, 15, 0.35);
  --accent: #2c2a4a;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--cream);
  color: var(--ink);
  font-family: "EB Garamond", Georgia, "Times New Roman", serif;
  overflow-x: hidden;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ---------- Landing / cover view ---------- */

#cover-view {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6vh 20px 8vh;
  text-align: center;
  transition: opacity 0.35s ease;
}

#cover-view.hidden,
#book-view.hidden {
  display: none;
}

.site-title {
  font-size: clamp(1.3rem, 3vw, 2rem);
  letter-spacing: 0.04em;
  margin: 0 0 28px;
  color: var(--ink);
  font-weight: 500;
}

.jacket-wrap {
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
  display: inline-block;
  transition: transform 0.25s ease;
}

.jacket-wrap:hover,
.jacket-wrap:focus-visible {
  transform: translateY(-4px);
}

.jacket-wrap img {
  width: min(80vw, 420px);
  height: auto;
  display: block;
  box-shadow:
    0 2px 0 rgba(0,0,0,0.08),
    6px 8px 18px var(--shadow),
    18px 20px 34px rgba(30,25,15,0.22);
  border-radius: 2px 6px 6px 2px;
}

.btn-open {
  margin-top: 34px;
}

.btn-outline {
  font-family: "EB Garamond", Georgia, serif;
  font-size: 1rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--border);
  padding: 14px 46px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  display: inline-block;
  text-decoration: none;
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.btn-outline:disabled,
.btn-outline.disabled {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}

.cover-hint {
  margin-top: 16px;
  font-size: 0.85rem;
  color: #8a8578;
  font-style: italic;
}

/* ---------- Book / reader view ---------- */

#book-view {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 14px 12px;
}

.stage {
  position: relative;
  perspective: 2400px;
  perspective-origin: 50% 50%;
  margin: 0 auto;
  touch-action: pan-y;
  flex-shrink: 0;
}

.leaf-shadow {
  position: absolute;
  inset: 0;
  box-shadow: 0 10px 40px var(--shadow);
  pointer-events: none;
  border-radius: 3px;
}

.page-layer {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--paper);
  border-radius: 3px;
  overflow: hidden;
}

.page-layer img,
.page-slot {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--paper);
  user-select: none;
  -webkit-user-drag: none;
}

.page-under {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
}

.page-slot-wrap {
  width: 100%;
  height: 100%;
}

.page-flip {
  position: absolute;
  top: 0;
  height: 100%;
  width: 100%;
  z-index: 3;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  will-change: transform;
}

.page-flip.origin-right {
  right: 0;
  transform-origin: right center;
}

.page-flip.origin-left {
  left: 0;
  transform-origin: left center;
}

.page-flip .face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  overflow: hidden;
  background: var(--paper);
}

.page-flip .face img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.page-flip .face.back {
  transform: rotateY(180deg);
}

.page-flip.animating {
  transition: transform 0.62s cubic-bezier(.4,.1,.2,1);
}

/* hotspots */
.hotspot {
  position: absolute;
  cursor: pointer;
  background: rgba(255,255,255,0);
  border-radius: 4px;
}

.hotspot:hover {
  background: rgba(120,140,255,0.12);
  outline: 1px solid rgba(80,90,160,0.35);
}

/* loading spinner over page area */
.page-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  pointer-events: none;
}
.page-loading .spinner {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 3px solid rgba(44,42,74,0.15);
  border-top-color: var(--ink);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* controls */
.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.ctrl-btn {
  font-family: "EB Garamond", Georgia, serif;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--border);
  padding: 10px 16px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  min-width: 66px;
}

.ctrl-btn:hover:not(:disabled) {
  background: var(--ink);
  color: var(--paper);
}

.ctrl-btn:disabled {
  opacity: 0.32;
  cursor: default;
}

.ctrl-btn.close-btn {
  margin-right: 10px;
  border-color: #b56a5a;
  color: #9a4f42;
}
.ctrl-btn.close-btn:hover {
  background: #9a4f42;
  color: var(--paper);
  border-color: #9a4f42;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translate(-50%, 12px);
  background: var(--ink);
  color: var(--paper);
  padding: 12px 22px;
  border-radius: 3px;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 50;
}
.toast.show {
  opacity: 0.96;
  transform: translate(-50%, 0);
}

@media (max-width: 480px) {
  .ctrl-btn { padding: 9px 12px; font-size: 0.72rem; min-width: 54px; }
  .btn-outline { padding: 12px 32px; font-size: 0.92rem; }
}