/* Variables */
:root {
  --cream: #fafafa;
  --cream-dark: #e5e5e5;
  --ink: #2c2416;
  --ink-light: #5c5040;
  --ink-faded: #8a8070;
  --accent: #8b4513;
  --accent-hover: #a0522d;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  background: var(--cream);
  color: var(--ink);
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-hover);
}

/* Splash Screen */
.splash {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 2rem;
}

/* Floating Example Images */
.floating-fragments {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.fragment {
  position: absolute;
  opacity: 0.15;
  filter: grayscale(30%);
  transition: opacity 0.6s ease;
}

.splash:hover .fragment {
  opacity: 0.25;
}

.fragment-1 {
  top: 5%;
  left: -5%;
  width: 560px;
  transform: rotate(-8deg);
}

.fragment-2 {
  top: 10%;
  right: -3%;
  width: 400px;
  transform: rotate(5deg);
}

.fragment-3 {
  bottom: 5%;
  left: 2%;
  width: 360px;
  transform: rotate(3deg);
}

.fragment-4 {
  bottom: 10%;
  right: 5%;
  width: 440px;
  transform: rotate(-4deg);
}

/* Splash Content */
.splash-content {
  position: relative;
  z-index: 1;
  max-width: 540px;
  width: 100%;
  background: var(--cream);
  border: 1px solid var(--cream-dark);
  box-shadow:
    0 1px 3px rgba(44, 36, 22, 0.04),
    0 8px 40px rgba(44, 36, 22, 0.08);
  padding: 3rem;
}

/* Header */
.splash-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--cream-dark);
  overflow: hidden;
}

.logo {
  float: left;
  width: 100px;
  height: 100px;
  object-fit: none;
  object-position: 70% 30%;
  opacity: 0.8;
  margin-right: 1rem;
}

.splash-header h1 {
  font-size: 2.25rem;
  font-weight: normal;
  font-style: italic;
  letter-spacing: 0.02em;
  margin: 0 0 0.25rem 0;
  padding: 0;
  color: var(--ink);
  text-align: left;
}

.tagline {
  font-size: 1rem;
  color: var(--ink-faded);
  margin: 0 0 0.25rem 0;
  padding: 0;
  text-align: left;
}

.byline {
  font-size: 0.85rem;
  color: var(--ink-faded);
  margin: 0;
  padding: 0;
  text-align: left;
}

/* How It Works */
.how-it-works {
  margin-bottom: 2.5rem;
}

.step {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
}

.step:last-child {
  margin-bottom: 0;
}

.step-num {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-family: ui-monospace, 'SF Mono', Menlo, Monaco, monospace;
  color: var(--ink-faded);
  border: 1px solid var(--cream-dark);
  border-radius: 50%;
}

.step p {
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink-light);
  text-align: left;
}

/* Form */
#manifest-form {
  margin-bottom: 2rem;
}

.input-group {
  margin-bottom: 1rem;
}

.input-group label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faded);
  margin-bottom: 0.5rem;
}

.input-group input {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: ui-monospace, 'SF Mono', Menlo, Monaco, monospace;
  font-size: 0.85rem;
  border: 1px solid var(--cream-dark);
  background: white;
  color: var(--ink);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.1);
}

.input-group input::placeholder {
  color: var(--ink-faded);
}

#manifest-form button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 1rem;
  font-style: italic;
  background: var(--ink);
  color: var(--cream);
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
}

#manifest-form button:hover {
  background: var(--ink-light);
}

#manifest-form button:active {
  transform: translateY(1px);
}

#manifest-form button svg {
  transition: transform 0.2s ease;
}

#manifest-form button:hover svg {
  transform: translateX(3px);
}

/* Example Books */
.example-books {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--cream-dark);
}

.example-books h2 {
  font-size: 0.9rem;
  font-weight: normal;
  color: var(--ink-faded);
  margin: 0 0 1rem;
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 1rem;
}

.example-card {
  display: block;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.example-card:hover {
  transform: translateY(-2px);
}

.example-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--cream-dark);
}

.example-card .example-title {
  display: block;
  font-size: 0.75rem;
  color: var(--ink-faded);
  margin-top: 0.4rem;
  line-height: 1.3;
}

.example-card:hover .example-title {
  color: var(--accent);
}

.example-card .example-credit {
  display: block;
  font-size: 0.65rem;
  color: var(--ink-faded);
  opacity: 0.7;
}

/* Footer */
.splash-footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--ink-faded);
  padding-top: 1.5rem;
  border-top: 1px solid var(--cream-dark);
}

.splash-footer a {
  color: var(--ink-faded);
}

.splash-footer a:hover {
  color: var(--accent);
}

.splash-footer .divider {
  margin: 0 0.5rem;
}

/* Hide splash when processing */
.splash.hidden {
  display: none !important;
}

/* Main app area - Gallery view */
main {
  min-height: 100vh;
  padding: 100px 2rem 4rem;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  position: relative;
  background: var(--cream);
}

/* The book stage - where the magic happens */
.book-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hidden utility */
.hidden {
  display: none !important;
}

/* Canvas styles - Stacked archival pages */
canvas {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);

  /* These settings are best for screenshots
  top: 0;
  left: 0;
  right: 0;
  transform: none;
  */

  max-width: 600px;
}

/* Quick fade in for new canvases */
@keyframes page-appear {
  from { opacity: 0; }
  to { opacity: 1; }
}

canvas {
  animation: page-appear 0.15s ease-out both;
}

/* Loading indicator */
#loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--cream);
  border: 1px solid var(--cream-dark);
  padding: 2rem 3rem;
  box-shadow: 0 8px 40px rgba(44, 36, 22, 0.15);
  font-size: 1rem;
  font-style: italic;
  color: var(--ink-light);
  z-index: 1000;
}

/* Error display */
#error {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--cream);
  border: 1px solid #c44;
  padding: 2rem 3rem;
  box-shadow: 0 8px 40px rgba(44, 36, 22, 0.15);
  font-size: 1rem;
  color: #a33;
  z-index: 1000;
  max-width: 500px;
  text-align: center;
}

/* Browse Navigation Toolbar */
.browse-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--cream);
  border-bottom: 1px solid var(--cream-dark);
  box-shadow: 0 2px 12px rgba(44, 36, 22, 0.06);
  z-index: 1000;
}

.nav-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-divider {
  width: 1px;
  height: 24px;
  background: var(--cream-dark);
  margin: 0 0.5rem;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.875rem;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--ink);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.nav-btn:hover:not(:disabled) {
  background: var(--cream-dark);
  border-color: var(--cream-dark);
}

.nav-btn:active:not(:disabled) {
  transform: translateY(1px);
}

.nav-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.nav-btn svg {
  flex-shrink: 0;
  stroke: currentColor;
  transition: transform 0.15s ease;
}

#prev-btn:hover:not(:disabled) svg {
  transform: translateX(-2px);
}

#next-btn:hover:not(:disabled) svg {
  transform: translateX(2px);
}

.nav-btn-download:hover:not(:disabled) svg {
  transform: translateY(2px);
}

/* Page indicator */
.page-indicator {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  padding: 0.375rem 0.75rem;
  font-family: ui-monospace, 'SF Mono', Menlo, Monaco, monospace;
  font-size: 0.8rem;
  color: var(--ink-faded);
  background: white;
  border: 1px solid var(--cream-dark);
  min-width: 5.5rem;
  justify-content: center;
}

.page-current {
  color: var(--ink);
  font-weight: 500;
}

.page-sep {
  color: var(--cream-dark);
  margin: 0 0.125rem;
}

.page-total {
  color: var(--ink-faded);
}

.page-ready {
  color: var(--ink-faded);
  margin-left: 0.5rem;
  padding-left: 0.5rem;
  border-left: 1px solid var(--cream-dark);
}

.page-ready:empty {
  display: none;
}

/* Status display */
.nav-status {
  font-family: ui-monospace, 'SF Mono', Menlo, Monaco, monospace;
  font-size: 0.75rem;
  color: var(--ink-faded);
  gap: 1rem;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.status-item:empty {
  display: none;
}

.status-processing {
  color: var(--accent);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-processing:not(:empty) {
  animation: pulse 1.5s ease-in-out infinite;
}

/* Hide nav button text on small screens */
@media (max-width: 500px) {
  .nav-btn-text {
    display: none;
  }

  .nav-btn {
    padding: 0.5rem;
  }

  .browse-nav {
    padding: 0.5rem 1rem;
  }
}

/* Responsive */
@media (max-width: 600px) {
  .splash {
    padding: 1rem;
  }

  .splash-content {
    padding: 2rem 1.5rem;
  }

  .splash-header h1 {
    font-size: 1.75rem;
  }

  .fragment {
    display: none;
  }
}