/* ========================================
   Adventures of Light & Dark
   Graphic Novel Reader Styles
   ======================================== */

:root {
  /* Colors - The Darkness Palette */
  --color-void: #0a0a0c;
  --color-deep: #12121a;
  --color-shadow: #1a1a24;
  --color-muted: #2a2a3a;
  --color-dim: #4a4a5a;

  /* Colors - The Light Palette */
  --color-warm: #f5e6d3;
  --color-glow: #fff8f0;
  --color-ember: #d4a574;
  --color-gold: #c9a227;

  /* Typography */
  --font-display: 'Cormorant Garamond', serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Transitions */
  --transition-slow: 1.2s ease;
  --transition-medium: 0.6s ease;
  --transition-fast: 0.3s ease;
}

/* ========================================
   Reset & Base
   ======================================== */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-void);
  color: var(--color-warm);
  min-height: 100vh;
  min-height: 100dvh; /* Dynamic viewport height for mobile */
  overflow: hidden;
  touch-action: pan-y; /* Allow vertical scroll, we handle horizontal swipe */
}

/* ========================================
   Reader Container
   ======================================== */

#reader {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100vh;
  height: 100dvh; /* Dynamic viewport height for mobile */
}

.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.screen.active {
  opacity: 1;
  visibility: visible;
}

/* ========================================
   Title Screen
   ======================================== */

.title-content {
  text-align: center;
  max-width: 600px;
  padding: var(--space-md);
}

.title-content h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin-bottom: var(--space-md);
  color: var(--color-glow);
}

.subtitle {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.6;
  color: var(--color-dim);
  margin-bottom: var(--space-lg);
}

.begin-button {
  font-family: var(--font-display);
  font-size: 1.125rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-warm);
  background: transparent;
  border: 1px solid var(--color-muted);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.begin-button:hover {
  border-color: var(--color-ember);
  color: var(--color-glow);
  background: rgba(212, 165, 116, 0.1);
}

/* ========================================
   Panel Screen
   ======================================== */

#panel-screen {
  padding: var(--space-md);
  padding-bottom: 80px;
}

.panel-container {
  width: 100%;
  max-width: 900px;
  height: calc(100vh - 160px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* Act Title */
.act-title {
  text-align: center;
  margin-bottom: var(--space-lg);
  opacity: 1;
  transition: opacity var(--transition-medium);
}

.act-title.hidden {
  opacity: 0;
  position: absolute;
  visibility: hidden;
}

.act-title .act-number {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-dim);
  display: block;
  margin-bottom: var(--space-xs);
}

.act-title .act-name {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 400;
  color: var(--color-glow);
}

/* Panel Content */
.panel-content {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.panel-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 800px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-void);
  border-radius: 2px;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 20px 60px rgba(0, 0, 0, 0.5);
}

.panel-frame {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

#panel-image {
  position: absolute;
  top: 4%;
  left: 2.5%;
  width: 95%;
  height: 92%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--transition-medium);
}

#panel-image.loaded {
  opacity: 1;
}

.panel-text {
  text-align: center;
  max-width: 600px;
  padding: 0 var(--space-sm);
}

.panel-title {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-dim);
  margin-bottom: var(--space-sm);
}

.dialogue {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-style: italic;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-warm);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition-medium), transform var(--transition-medium);
}

.dialogue.visible {
  opacity: 1;
  transform: translateY(0);
}

.intent {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 300;
  line-height: 1.6;
  color: var(--color-dim);
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-muted);
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.intent.visible {
  opacity: 1;
}

.intent.hidden {
  display: none;
}

/* ========================================
   Navigation
   ======================================== */

.panel-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: linear-gradient(to top, var(--color-void) 0%, transparent 100%);
}

.nav-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-muted);
  border-radius: 50%;
  color: var(--color-dim);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-btn:hover:not(:disabled) {
  border-color: var(--color-ember);
  color: var(--color-warm);
}

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

.progress {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--color-dim);
  min-width: 60px;
  text-align: center;
}

/* ========================================
   End Screen
   ======================================== */

.end-content {
  text-align: center;
}

.end-text {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-style: italic;
  color: var(--color-dim);
  margin-bottom: var(--space-lg);
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
  :root {
    --space-md: 1rem;
    --space-lg: 2rem;
  }

  #panel-screen {
    padding: var(--space-sm);
    padding-bottom: 70px;
  }

  .panel-container {
    height: calc(100dvh - 120px);
  }

  .panel-image-wrapper {
    aspect-ratio: 4 / 3;
  }

  .panel-text {
    padding: 0 var(--space-xs);
  }

  .panel-title {
    font-size: 0.65rem;
    margin-bottom: var(--space-xs);
  }

  .panel-nav {
    gap: var(--space-sm);
    padding: var(--space-sm);
  }

  .nav-btn {
    width: 44px;
    height: 44px;
  }

  .subtitle {
    margin-bottom: var(--space-md);
  }
}

/* Small phones */
@media (max-width: 380px) {
  :root {
    --space-sm: 0.75rem;
  }

  .title-content h1 {
    font-size: 2rem;
  }

  .dialogue {
    font-size: 1rem;
  }
}

/* Landscape on mobile */
@media (max-height: 500px) and (orientation: landscape) {
  #panel-screen {
    padding: var(--space-xs);
    padding-bottom: 60px;
  }

  .panel-container {
    flex-direction: row;
    height: calc(100dvh - 70px);
    gap: var(--space-sm);
  }

  .panel-image-wrapper {
    aspect-ratio: 16 / 10;
    max-width: 55%;
    max-height: 100%;
  }

  .panel-text {
    max-width: 40%;
    text-align: left;
  }

  .panel-nav {
    padding: var(--space-xs);
  }

  .nav-btn {
    width: 36px;
    height: 36px;
  }

  .act-title {
    margin-bottom: var(--space-sm);
  }

  .act-title .act-name {
    font-size: 1.75rem;
  }
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-slow) forwards;
}

.slide-up {
  animation: slideUp var(--transition-medium) forwards;
}