:root {
  /* Colors */
  --color-bg-page: #111;
  --color-text-primary: #eee;
  --color-text-muted: #888;
  --color-text-secondary: #aaa;
  --color-control-bg: #2a2a2a;
  --color-control-border: #444;
  --color-card-bg: rgba(24, 24, 24, 0.9);

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 6px;
  --spacing-md: 8px;
  --spacing-lg: 12px;

  /* Border radius */
  --radius-sm: 3px;
  --radius-md: 4px;

  /* Effects */
  --blur-card: blur(8px);

  /* Font sizes */
  --font-xs: 0.8em;
  --font-sm: 0.85em;
  --font-md: 0.9em;

  /* Viewport height - set dynamically by JavaScript for mobile */
  --vh: 1vh;
}

body {
  margin: 0;
  background: var(--color-bg-page);
  color: var(--color-text-primary);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Arial;
}

/* Card base style */
.topbar {
  position: fixed;
  z-index: 1000;
  background: var(--color-card-bg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  backdrop-filter: var(--blur-card);
  font-size: var(--font-xs);
}

.topbar {
  top: var(--spacing-md);
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.topbar--left {
  left: var(--spacing-md);
  flex-direction: column;
  align-items: flex-start;
}

.topbar--right {
  right: var(--spacing-md);
  flex-direction: column;
}

/* Control base style */
.topbar__select,
.topbar__toggle-btn {
  background: var(--color-control-bg);
  border: 1px solid var(--color-control-border);
  color: var(--color-text-primary);
  border-radius: var(--radius-sm);
}

.topbar__select {
  padding: var(--spacing-sm);
}

.topbar__label {
  margin-bottom: var(--spacing-md);
  text-align: center;
  white-space: pre-line;
  opacity: 0.8;
  font-size: var(--font-md);
}

.topbar__progress {
  margin-bottom: var(--spacing-md);
  text-align: center;
  font-size: var(--font-sm);
  color: var(--color-text-muted);
  cursor: pointer;
}

.topbar__mode-indicator {
  margin-bottom: var(--spacing-md);
  text-align: center;
  font-size: var(--font-md);
  width: 100%;
  display: flex;
  justify-content: center;
}

.topbar__toggle-container {
  margin-bottom: var(--spacing-md);
  text-align: center;
  font-size: var(--font-sm);
}

.topbar__toggle-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  cursor: pointer;
  font-size: var(--font-sm);
}

.viewer {
  display: flex;
  justify-content: center;
  align-items: center;
  height: calc(var(--vh, 1vh) * 100);
  padding: 0;
}

.viewer__page {
  height: calc(var(--vh, 1vh) * 100);
  width: auto;
  max-width: 100%;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.6);
  background: #000;
  object-fit: contain;
  touch-action: pan-x pan-y;
}

.viewer__half-container,
.viewer__multi-container {
  display: none;
}

.viewer__half-page {
  /* Styles applied dynamically by JavaScript */
}

.loading-indicator {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: calc(var(--vh, 1vh) * 100);
  background: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: var(--spacing-lg);
  z-index: 9999;
}

.loading-indicator.visible {
  display: flex;
}

.loading-indicator__spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--color-text-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-indicator__text {
  color: var(--color-text-primary);
  font-size: 1em;
}

.topbar__settings-hint {
  color: var(--color-text-secondary);
  font-size: 0.65em;
  text-align: center;
  padding: 2px 0;
  margin-top: 2px;
}

/* Mobile bottom bar */
.mobile-bottom-bar {
  display: none; /* Hidden on desktop */
}

/* Mobile adjustments */
@media (pointer: coarse) {
  body {
    overflow: hidden;
    touch-action: pan-x pan-y;
  }

  .topbar__mode-indicator {
    display: none;
  }

  .topbar__toggle-container {
    display: none;
  }

  .topbar--right {
    display: none;
  }

  .topbar--left {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    flex-direction: row;
    align-items: center;
    gap: 5px;
    padding: 5px;
    flex-shrink: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    overflow: hidden;
    z-index: 2000;
    border-radius: 0;
  }

  .topbar--left.mobile-hidden {
    opacity: 0;
    transform: translateY(-100%);
    pointer-events: none;
  }

  .topbar--left .topbar__select#series {
    flex: 0 0 75%;
    width: 75%;
  }

  .topbar--left .topbar__select#chapter {
    flex: 0 0 calc(25% - 5px);
    width: calc(25% - 5px);
  }

  .viewer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: calc(var(--vh, 1vh) * 100);
    display: flex;
    justify-content: center;
    align-items: center;
    touch-action: pan-x pan-y;
  }

  .viewer__page {
    width: auto;
    height: calc(var(--vh, 1vh) * 100);
    max-width: 100vw;
    max-height: calc(var(--vh, 1vh) * 100);
    object-fit: contain;
    touch-action: pan-x pan-y;
  }

  .mobile-bottom-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 2000;
    background: var(--color-card-bg);
    backdrop-filter: var(--blur-card);
    padding: 5px;
    padding-bottom: calc(5px + env(safe-area-inset-bottom));
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-sm);
    flex-shrink: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    overflow: hidden;
    border-radius: 0;
  }

  .mobile-bottom-bar.mobile-hidden {
    opacity: 0;
    transform: translateY(100%);
    pointer-events: none;
  }

  .mobile-bottom-bar__label {
    color: var(--color-text-primary);
  }

  .mobile-bottom-bar__progress {
    color: var(--color-text-muted);
  }
}

/* ========================================
   LocalStorage Viewer
   ======================================== */

/* Hide main viewer when viewing localStorage */
body.viewing-localstorage .viewer,
body.viewing-localstorage .topbar {
  display: none;
}

/* Hide everything when viewing settings */
body.viewing-settings .viewer,
body.viewing-settings .topbar,
body.viewing-settings .mobile-bottom-bar {
  display: none;
}

body.viewing-settings {
  background: rgba(0, 0, 0, 0.7);
}

.localstorage-viewer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-bg-page);
  overflow-y: auto;
  z-index: 10000;
  padding: 20px;
}

/* Overlay mode: floating panel on right side */
.localstorage-viewer--overlay {
  top: 180px;
  left: auto;
  right: 10px;
  width: 450px;
  max-width: calc(100vw - 20px);
  height: calc(100vh - 190px);
  background: rgba(17, 17, 17, 0.95);
  border: 1px solid var(--color-control-border);
  border-radius: var(--radius-md);
  padding: 16px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.localstorage-viewer--overlay .localstorage-viewer__header {
  margin-bottom: 16px;
}

.localstorage-viewer--overlay .localstorage-viewer__header h1 {
  font-size: 1.3em;
}

.localstorage-viewer--overlay .localstorage-viewer__content {
  max-width: 100%;
}

.localstorage-viewer--overlay .localstorage-viewer__section {
  margin-bottom: 12px;
  padding: 12px;
}

.localstorage-viewer--overlay .localstorage-viewer__section h2 {
  font-size: 1.1em;
  margin-bottom: 10px;
}

.localstorage-viewer__header {
  max-width: 1200px;
  margin: 0 auto 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.localstorage-viewer__header h1 {
  margin: 0;
  color: var(--color-text-primary);
  font-size: 2em;
}

.localstorage-viewer__back {
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 8px 16px;
  background: var(--color-control-bg);
  border: 1px solid var(--color-control-border);
  border-radius: var(--radius-md);
  font-size: 0.9em;
}

.localstorage-viewer__back:hover {
  background: #3a3a3a;
  color: var(--color-text-primary);
}

.localstorage-viewer__close {
  background: var(--color-control-bg);
  border: 1px solid var(--color-control-border);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  padding: 4px 12px;
  font-size: 1.2em;
  cursor: pointer;
  line-height: 1;
}

.localstorage-viewer__close:hover {
  background: #3a3a3a;
  color: var(--color-text-primary);
}

.localstorage-viewer__content {
  max-width: 1200px;
  margin: 0 auto;
}

.localstorage-viewer__section {
  background: var(--color-card-bg);
  padding: 20px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  border: 1px solid var(--color-control-border);
}

.localstorage-viewer__section h2 {
  margin: 0 0 16px 0;
  color: var(--color-text-primary);
  font-size: 1.5em;
}

.localstorage-viewer__code {
  background: #1a1a1a;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  color: #6cf;
  border: 1px solid #333;
}

.localstorage-viewer__json {
  background: #1a1a1a;
  padding: 16px;
  border-radius: var(--radius-sm);
  font-family: 'Courier New', monospace;
  font-size: 0.85em;
  color: #9f9;
  overflow-x: auto;
  margin: 0;
  border: 1px solid #333;
}

.localstorage-viewer__empty {
  color: var(--color-text-muted);
  font-style: italic;
  padding: 12px;
}

.localstorage-viewer__series-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.localstorage-viewer__series {
  background: #1a1a1a;
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid #333;
}

.localstorage-viewer__series h3 {
  margin: 0 0 16px 0;
  color: #6cf;
  font-size: 1.2em;
  border-bottom: 1px solid #333;
  padding-bottom: 8px;
}

.localstorage-viewer__item {
  margin-bottom: 16px;
}

.localstorage-viewer__item:last-child {
  margin-bottom: 0;
}

.localstorage-viewer__item strong {
  display: block;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
  font-size: 0.9em;
}

.localstorage-viewer__chapter-views {
  margin-top: 8px;
}

.localstorage-viewer__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85em;
  background: #0f0f0f;
}

.localstorage-viewer__table thead {
  background: #222;
}

.localstorage-viewer__table th,
.localstorage-viewer__table td {
  padding: 8px 12px;
  text-align: left;
  border: 1px solid #333;
}

.localstorage-viewer__table th {
  color: var(--color-text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8em;
}

.localstorage-viewer__table td {
  color: var(--color-text-primary);
}

.badge-complete {
  color: #6f6;
  font-weight: 600;
}

.badge-incomplete {
  color: #f96;
  font-weight: 600;
}