/* ── TOKENS ─────────────────────────────────────────────────── */
:root {
  --bg:           #111111; /* Darkened slightly to make the PDF pop when fullscreen */
  --surface:      #faf9f7;
  --topbar-bg:    #1a1a1a;
  --topbar-text:  #e8e2d8;
  --sidebar-bg:   #ffffff;
  --border:       #e2ddd7;
  --accent:       #b5460f;
  --accent-hover: #8f360a;
  --text:         #1a1a1a;
  --text-muted:   #888077;
  --label:        #a09890;
  --radius:       6px;
  --shadow:       0 8px 40px rgba(0,0,0,0.4);
  --sidebar-w:    220px;
  --topbar-h:     54px;
  --bottombar-h:  60px;
}

/* ── RESET ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  overflow: hidden;
  touch-action: manipulation;
  -webkit-text-size-adjust: 100%;
}

/* ── TOPBAR ─────────────────────────────────────────────────── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--topbar-bg);
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  font-size: 20px;
  color: var(--accent);
  line-height: 1;
}
.logo-text {
  font-family: 'Playfair Display', serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--topbar-text);
  letter-spacing: 0.04em;
}

.topbar-center .issue-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #666;
}

.page-indicator {
  font-family: 'Playfair Display', serif;
  font-size: 15px;
  color: var(--topbar-text);
  opacity: 0.7;
  letter-spacing: 0.05em;
}

/* ── MAIN LAYOUT ────────────────────────────────────────────── */
.layout {
  position: fixed;
  top: 0;
  bottom: var(--bottombar-h);
  left: 0; right: 0;
  display: flex;
  overflow: hidden;
}

/* ── SIDEBAR ────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  display: none;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
}

.sidebar-section {
  padding: 10px 0;
}
.sidebar-label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--label);
  margin-bottom: 4px;
}
.sidebar-value {
  font-family: 'Playfair Display', serif;
  font-size: 18px;
  color: var(--text);
  font-weight: 400;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 12px 0;
}

/* ── STAGE ──────────────────────────────────────────────────── */
.stage {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  overflow: hidden;
  padding: 10px; /* Slight padding so the PDF doesn't cut directly into the screen edges */
}

/* ── LOADING OVERLAY ────────────────────────────────────────── */
.loader-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.loader-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.spinner {
  width: 40px; height: 40px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loader-text {
  font-size: 13px;
  color: #fff;
  letter-spacing: 0.06em;
}
.progress-track {
  width: 200px;
  height: 3px;
  background: #333;
  border-radius: 99px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 99px;
  transition: width 0.2s ease;
}
.loader-pct {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  color: var(--accent);
  letter-spacing: 0.04em;
}

/* ── FLIPBOOK ELEMENT ───────────────────────────────────────── */
#flipbook {
  /* Forces the flipbook to expand to the max size of the stage */
  width: 100%;
  height: 100%;
  box-shadow: var(--shadow);
  touch-action: none;
  -webkit-user-select: none;
  user-select: none; 
}

/* Page images inside the flipbook */
.page {
  background: #fff;
  overflow: hidden;
}
.page img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain; /* Ensures the image aspect ratio is respected */
  pointer-events: none;
}

/* ── BOTTOM BAR ──────────────────────────────────────────────── */
.bottombar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--bottombar-h);
  background: rgba(26, 26, 26, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  border-top: 1px solid #333;
  backdrop-filter: blur(10px);
  z-index: 100;
}

.controls-container {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
}

.btn-control {
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid #555;
  border-radius: 6px;
  color: #ddd;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.btn-control:hover:not(:disabled) {
  background: #333;
  border-color: #888;
  color: #fff;
}

.btn-control:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.btn-control svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-info {
  font-family: 'Playfair Display', serif;
  font-size: 14px;
  color: #ddd;
  min-width: 80px;
  text-align: center;
}

.page-info #page-indicator {
  font-size: 14px;
}

.divider-vertical {
  width: 1px;
  height: 24px;
  background: #444;
}

.jump-section {
  display: flex;
  gap: 6px;
  align-items: center;
}

.jump-input-mini {
  width: 120px;
  padding: 7px 10px;
  border: 1px solid #555;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
  color: #ddd;
  font-size: 12px;
  outline: none;
}

.jump-input-mini:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.1);
}

.jump-input-mini::placeholder {
  color: #888;
}

.btn-jump-mini {
  padding: 7px 16px;
  background: var(--accent);
  border: none;
  border-radius: 4px;
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-jump-mini:hover {
  background: var(--accent-hover);
}

.btn-jump-mini:active {
  transform: scale(0.98);
}