/**
 * Worksheet Reader Skin (Level 1 Visual Skin)
 * Scoped strictly to: body.reader-mode.reader-skin-worksheet
 * Transforms novel reading into an Excel / Spreadsheet-inspired layout
 * while preserving standard paragraphs (<p>), window scrolling, and all reader features.
 */

/* ==========================================================================
   1. COLOR HARMONIZATION WITH PALETTES
   ========================================================================== */
body.reader-mode.reader-skin-worksheet {
  --ws-ribbon-accent: #107c41; /* Excel green */
  --ws-grid-border: var(--border);
  --ws-header-bg: var(--panel-strong);
  --ws-cell-hover: color-mix(in srgb, var(--accent) 5%, transparent);
}

body.theme-dark.reader-mode.reader-skin-worksheet {
  --ws-ribbon-accent: #10b981; /* Emerald bright on dark */
}

body.theme-sepia.reader-mode.reader-skin-worksheet {
  --ws-ribbon-accent: #2d6a4f; /* Muted forest green on sepia */
}

/* ==========================================================================
   2. TOPBAR EXCEL RIBBON TREATMENT
   ========================================================================== */
body.reader-mode.reader-skin-worksheet .topbar {
  border-top: 3px solid var(--ws-ribbon-accent) !important;
  border-radius: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

body.reader-mode.reader-skin-worksheet .reader-action-btn {
  border-radius: 4px;
  font-size: var(--ui-font-sm);
  transition: all 0.15s ease;
}

body.reader-mode.reader-skin-worksheet .reader-action-btn:hover:not(:disabled) {
  background: var(--ws-cell-hover);
  border-color: var(--ws-ribbon-accent);
}

/* ==========================================================================
   3. READER CARD & WORKSHEET SURFACE
   ========================================================================== */
body.reader-mode.reader-skin-worksheet .reader-card {
  border-radius: 4px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  padding: 32px 40px 180px;
  position: relative;
}

/* Simulated formula / title bar above content */
body.reader-mode.reader-skin-worksheet .reader-header {
  border: 1px solid var(--border);
  border-radius: 4px 4px 0 0;
  background: var(--ws-header-bg);
  padding: 10px 16px;
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}


body.reader-mode.reader-skin-worksheet .reader-story-title {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
}

body.reader-mode.reader-skin-worksheet #readerChapterTitle {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
  color: var(--text);
}

body.reader-mode.reader-skin-worksheet .reader-chapter-progress {
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 2px;
}

/* ==========================================================================
   4. WORKSHEET CONTENT & CSS COUNTER ROW NUMBERS
   ========================================================================== */
body.reader-mode.reader-skin-worksheet .reader-content {
  counter-reset: excel-row;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--reader-surface);
}

body.reader-mode.reader-skin-worksheet .reader-content p {
  position: relative;
  margin: 0 !important;
  padding: 12px 20px 12px 64px;
  border-bottom: 1px solid var(--border);
  counter-increment: excel-row;
  line-height: var(--reader-line-height);
  font-size: var(--reader-font-size);
  font-family: var(--reader-font-family);
  min-height: 32px;
  text-align: left; /* Left align for tabular reading */
  hyphens: none;
  word-break: break-word;
  transition: background-color 0.12s ease;
}

body.reader-mode.reader-skin-worksheet .reader-content p:last-child {
  border-bottom: none;
}

/* Row Hover Highlight */
body.reader-mode.reader-skin-worksheet .reader-content p:hover {
  background-color: var(--ws-cell-hover);
}

/* Row Number Column (Simulating Column A) */
body.reader-mode.reader-skin-worksheet .reader-content p::before {
  content: counter(excel-row);
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 52px;
  background: var(--panel-strong);
  border-right: 1px solid var(--border);
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
  font-weight: 500;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding-top: 12px;
  padding-right: 8px;
  box-sizing: border-box;
  user-select: none;
  pointer-events: none;
}

/* Inactive drop cap in worksheet skin */
body.reader-mode.reader-skin-worksheet .reader-content p:first-child::first-letter {
  font-size: inherit;
  font-weight: inherit;
}

/* ==========================================================================
   5. SHEET TABS BOTTOM NAVIGATION
   ========================================================================== */
body.reader-mode.reader-skin-worksheet .floating-reader-nav {
  border-radius: 6px 6px 0 0;
  border-bottom: none;
  background: var(--panel-strong) !important;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
  padding: 6px 12px;
  gap: 6px;
  bottom: 0;
}

body.reader-mode.reader-skin-worksheet .floating-reader-nav .reader-action-btn {
  border-radius: 4px 4px 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
  background: var(--panel);
  font-size: 12px;
  padding: 6px 10px;
}

body.reader-mode.reader-skin-worksheet .floating-reader-nav .reader-action-btn:hover:not(:disabled) {
  border-color: var(--ws-ribbon-accent);
  color: var(--ws-ribbon-accent);
}

/* ==========================================================================
   6. RESPONSIVE MOBILE ADAPTATION (<= 768px)
   ========================================================================== */
@media (max-width: 768px) {
  body.reader-mode.reader-skin-worksheet .reader-card {
    padding: 12px 8px max(24vh, calc(140px + env(safe-area-inset-bottom, 20px))) 8px !important;
    border-left: none;
    border-right: none;
    border-radius: 0;
  }

  body.reader-mode.reader-skin-worksheet .reader-content p {
    padding: 10px 12px 10px 46px;
  }

  body.reader-mode.reader-skin-worksheet .reader-content p::before {
    width: 38px;
    font-size: 10px;
    padding-top: 10px;
    padding-right: 4px;
  }
}