/* --------------------------------------------------------------------------
   THE SILENT LOVE — Production Visual PDF Reader Stylesheet
   Authoritative Colors: Midnight Navy (#08131C), Warm Black (#11100F),
   Paper Cream (#F3E9D8), Muted Gold (#C69A52), Warm Brown (#765A3D)
   -------------------------------------------------------------------------- */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700&family=Cormorant+Garamond:ital,wght@0,400;0,600;1,400&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --color-navy: #08131c;
  --color-warm-black: #11100f;
  --color-paper-cream: #f3e9d8;
  --color-gold: #c69a52;
  --color-gold-bright: #e2b76b;
  --color-brown: #765a3d;
  --color-overlay: rgba(8, 19, 28, 0.92);
  --color-border: rgba(198, 154, 82, 0.2);

  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-display: 'Cinzel', serif;
  --font-sans: 'Inter', system-ui, sans-serif;

  --shadow-page: 0 15px 45px rgba(0, 0, 0, 0.65), 0 2px 10px rgba(0, 0, 0, 0.3);
  --transition-fast: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--color-navy);
  color: var(--color-paper-cream);
  font-family: var(--font-sans);
  overflow: hidden;
  user-select: none;
}

/* Subtle Paper Texture Overlay for UI */
.bg-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* --------------------------------------------------------------------------
   LANDING PAGE & CINEMATIC INTRO
   -------------------------------------------------------------------------- */

.landing-wrapper {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 35%, #102131 0%, #08131c 85%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 3rem 1.5rem;
  z-index: 100;
  overflow-y: auto;
}

.landing-header-title {
  font-family: var(--font-display);
  font-size: 2.8rem;
  letter-spacing: 0.15em;
  color: var(--color-paper-cream);
  text-align: center;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 15px rgba(198, 154, 82, 0.25);
}

.landing-header-subtitle {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--color-gold);
  text-align: center;
  margin-bottom: 1.5rem;
}

.landing-cover-preview {
  width: 280px;
  height: 420px;
  border-radius: 4px;
  box-shadow: var(--shadow-page), 0 0 40px rgba(198, 154, 82, 0.15);
  border: 1px solid var(--color-border);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  background-color: var(--color-warm-black);
}

.landing-cover-preview:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 50px rgba(198, 154, 82, 0.3);
}

.landing-btn-begin {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, #c69a52 0%, #a27a36 100%);
  color: var(--color-navy);
  border: none;
  border-radius: 30px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 5px 25px rgba(198, 154, 82, 0.35);
  transition: var(--transition-fast);
  margin-top: 1.5rem;
}

.landing-btn-begin:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #e2b76b 0%, #b88d44 100%);
  box-shadow: 0 8px 30px rgba(198, 154, 82, 0.5);
}

/* --------------------------------------------------------------------------
   READER MAIN LAYOUT
   -------------------------------------------------------------------------- */

.reader-wrapper {
  position: fixed;
  inset: 0;
  background-color: var(--color-navy);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* TOP HEADER CONTROL BAR */
.reader-top-bar {
  height: 56px;
  width: 100%;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(8, 19, 28, 0.95);
  border-bottom: 1px solid var(--color-border);
  z-index: 50;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.reader-top-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  text-transform: uppercase;
}

.reader-top-counter {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--color-paper-cream);
}

.reader-top-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-paper-cream);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition-fast);
}

.btn-icon:hover {
  background: rgba(198, 154, 82, 0.15);
  border-color: var(--color-gold-bright);
  color: var(--color-gold-bright);
}

/* MAIN PDF VIEWPORT CANVAS CONTAINER */
.reader-viewport {
  flex: 1;
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  padding: 1.5rem;
  touch-action: pan-x pan-y pinch-zoom;
}

.pdf-canvas-card {
  box-shadow: var(--shadow-page);
  border-radius: 2px;
  background-color: var(--color-paper-cream);
  transition: transform 0.2s ease, opacity 0.25s ease;
  position: relative;
  display: block;
}

/* BOTTOM NAVIGATION CONTROL BAR */
.reader-bottom-bar {
  height: 64px;
  width: 100%;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.5rem;
  background: rgba(8, 19, 28, 0.95);
  border-top: 1px solid var(--color-border);
  z-index: 50;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.nav-buttons-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
}

.btn-nav-step {
  background: transparent;
  border: none;
  color: var(--color-gold);
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
}

.btn-nav-step:hover {
  color: var(--color-gold-bright);
  background: rgba(198, 154, 82, 0.1);
}

/* Elegant Thin Gold Progress Line */
.progress-line-container {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.progress-track {
  flex: 1;
  height: 3px;
  background: rgba(198, 154, 82, 0.2);
  border-radius: 2px;
  position: relative;
  cursor: pointer;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #c69a52 0%, #e2b76b 100%);
  border-radius: 2px;
  width: 0%;
  transition: width 0.15s ease;
}

.progress-thumb {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-gold-bright);
  box-shadow: 0 0 8px rgba(226, 183, 107, 0.8);
}

/* --------------------------------------------------------------------------
   FOCUS READING MODE
   -------------------------------------------------------------------------- */

body.focus-mode .reader-top-bar {
  opacity: 0.2;
}

body.focus-mode .reader-top-bar:hover {
  opacity: 1;
}

body.focus-mode .reader-bottom-bar {
  opacity: 0.2;
}

body.focus-mode .reader-bottom-bar:hover {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   CHAPTER DRAWER & COMPANION SIDEBAR
   -------------------------------------------------------------------------- */

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 14, 0.75);
  backdrop-filter: blur(6px);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.chapter-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 340px;
  max-width: 85vw;
  height: 100%;
  background-color: var(--color-navy);
  border-left: 1px solid var(--color-border);
  z-index: 210;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
}

.chapter-drawer.open {
  transform: translateX(0);
}

.drawer-title {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.15em;
  color: var(--color-gold);
  margin-bottom: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.75rem;
}

.chapter-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.chapter-list::-webkit-scrollbar {
  width: 4px;
}
.chapter-list::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

.chapter-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border);
  padding: 0.8rem 1rem;
  border-radius: 6px;
  text-align: left;
  cursor: pointer;
  color: var(--color-paper-cream);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-fast);
}

.chapter-btn:hover {
  background: rgba(198, 154, 82, 0.1);
  border-color: var(--color-gold);
}

.chapter-btn.active {
  background: rgba(198, 154, 82, 0.2);
  border-color: var(--color-gold-bright);
}

.chapter-btn-name {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.chapter-btn-page {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  color: var(--color-gold);
}

/* STORY COMPANION SIDEBAR (SUPPLEMENTARY) */
.companion-panel {
  position: fixed;
  top: 0;
  left: 0;
  width: 340px;
  max-width: 85vw;
  height: 100%;
  background-color: var(--color-navy);
  border-right: 1px solid var(--color-border);
  z-index: 210;
  transform: translateX(-100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  overflow-y: auto;
}

.companion-panel.open {
  transform: translateX(0);
}

/* --------------------------------------------------------------------------
   RESPONSIVE MOBILE STYLING
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .reader-top-bar {
    padding: 0 1rem;
  }
  .reader-top-title {
    font-size: 0.72rem;
  }
  .reader-top-counter {
    font-size: 0.72rem;
  }
  .btn-icon span {
    display: none;
  }
  .landing-header-title {
    font-size: 2.1rem;
  }
  .landing-cover-preview {
    width: 240px;
    height: 360px;
  }
}