/* =====================================================
   Kindle-like Reading Experience for The Computist
   ===================================================== */

/* Hide Quarto breadcrumbs */
.quarto-page-breadcrumbs,
.quarto-secondary-nav,
#quarto-header {
  display: none !important;
}

/* NOTE: Google Fonts loaded via <link> in inject.py, not @import (avoids render-blocking waterfall) */

/* ========== CSS VARIABLES (Light/Dark Themes) ========== */
:root {
  /* Light theme (default - warm paper-like) */
  --bg-primary: #faf9f6;
  --bg-secondary: #f0ede6;
  --bg-content: #faf9f6;
  --text-primary: #2c2c2c;
  --text-secondary: #5a5a5a;
  --text-muted: #777;
  --link-color: #8b5cf6;
  --link-hover: #7c3aed;
  --border-color: #e5e5e5;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --sidebar-bg: #ffffff;
  --btn-bg: #e5e5e5;
  --btn-text: #2c2c2c;
  --accent-color: #f97316;
  
  /* Typography - match landing page */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-title: 'Playfair Display', Georgia, serif;
  --font-mono: 'Fira Code', 'JetBrains Mono', monospace;
  --font-size-base: 18px;
  --font-size-mobile: 16px;
  --line-height: 1.75;
  --content-max-width: 680px;
}

[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #252525;
  --bg-content: #1a1a1a;
  --text-primary: #e5e5e5;
  --text-secondary: #a0a0a0;
  --text-muted: #888;
  --link-color: #a78bfa;
  --link-hover: #c4b5fd;
  --border-color: #333;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --sidebar-bg: #222;
  --btn-bg: #2c2c2c;
  --btn-text: #ffffff;
  --accent-color: #f97316;
}

/* ========== BASE STYLES ========== */
* {
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base) !important;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: var(--line-height);
  margin: 0;
  padding: 0;
  transition: background-color 0.15s ease-out, color 0.15s ease-out;
  font-size: 1rem !important;
}

/* ========== HIDE QUARTO CHROME ========== */
#quarto-header,
#quarto-sidebar,
#quarto-sidebar-glass,
#quarto-margin-sidebar,
quarto-header,
.margin-sidebar,
.sidebar-collapse-container {
  display: none !important;
}

/* ========== MAIN CONTENT AREA ========== */
#quarto-content {
  padding: 0 !important;
  margin-left: 0 !important;
}

main.content,
#quarto-document-content {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  background-color: var(--bg-content);
  transition: background-color 0.15s ease-out, color 0.15s ease-out;
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 768px) {
  main.content,
  #quarto-document-content {
    max-width: 100%;
    padding: 1.5rem 1.5rem;
    font-size: var(--font-size-mobile);
    margin-left: 0 !important;
    margin-right: 0 !important;
  }
}

/* Ensure no extra margins on any parent */
#quarto-content,
.quarto-container,
.page-columns,
.page-rows-contents,
.page-layout-article {
  margin-left: 0 !important;
}

/* ========== TYPOGRAPHY ========== */
main.content h1 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 2.5rem;
  line-height: 1.2;
  margin-top: 2rem;
  margin-bottom: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

main.content h2 {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 1.75rem;
  line-height: 1.3;
  margin-top: 3rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

main.content h3 {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 1.35rem;
  line-height: 1.4;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

main.content p {
  margin-bottom: 1.25rem;
  text-align: justify;
  hyphens: auto;
  font-size: 1rem;
}

main.content a {
  color: var(--link-color);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

main.content a:hover {
  color: var(--link-hover);
  border-bottom-color: var(--link-hover);
}

/* Blockquotes */
main.content blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--link-color);
  background-color: var(--bg-secondary);
  border-radius: 0 8px 8px 0;
  font-style: italic;
}

main.content blockquote p {
  margin-bottom: 0;
}

/* Lists */
main.content ul,
main.content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

main.content li {
  margin-bottom: 0.5rem;
}

/* Code */
main.content code {
  font-family: 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background-color: var(--bg-secondary);
  padding: 0.2em 0.4em;
  border-radius: 4px;
}

main.content pre {
  background-color: var(--bg-secondary);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
}

main.content pre code {
  background: none;
  padding: 0;
}

/* Images */
main.content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1.5rem 0;
  box-shadow: 0 4px 12px var(--shadow-color);
}

/* Horizontal Rule */
main.content hr {
  border: none;
  height: 1px;
  background-color: var(--border-color);
  margin: 2rem 0;
}

/* Tables */
main.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9em;
}

main.content th,
main.content td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

main.content th {
  background-color: var(--bg-secondary);
  font-weight: 600;
}

main.content tr:nth-child(even) {
  background-color: var(--bg-secondary);
}

/* ========== DRAWER CONTROLS ========== */
#reader-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(36px + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  transition: height 0.3s ease;
  z-index: 9999;
  transform: translateZ(0);
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

#reader-drawer-handle {
  cursor: pointer;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1;
  padding: 12px 24px;
  min-height: 44px;
  display: flex;
  align-items: center;
  border-radius: 10px;
  transition: background-color 0.2s;
}

/* Always show scrollbar to prevent fixed element shift */
html {
  overflow-y: scroll;
}

body {
  overflow-x: hidden;
}

#reader-drawer.expanded {
  height: 90px;
}

#reader-drawer-handle {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  cursor: pointer;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1;
  padding: 4px 16px;
  border-radius: 10px;
  transition: background-color 0.2s;
}

#reader-drawer-handle:hover {
  background: var(--border-color);
}

#reader-drawer-controls {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding-top: 32px;
}

#reader-drawer.expanded #reader-drawer-controls {
  display: flex;
}

#reader-drawer-controls button {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--btn-bg);
  color: var(--btn-text);
  font-size: 16px !important;
  font-family: var(--font-ui);
  cursor: pointer;
  box-shadow: 0 2px 8px var(--shadow-color);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

#reader-drawer-controls button:hover {
  transform: scale(1.1);
}

#reader-drawer-controls button:active {
  transform: scale(0.95);
}

.reader-size-btns #font-current {
  font-size: 0.65rem;
  min-width: 20px;
  text-align: center;
}

/* ========== TOC SIDEBAR ========== */
#quarto-sidebar {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 280px !important;
  height: 100vh !important;
  background: var(--bg-primary) !important;
  border-right: 1px solid var(--border-color) !important;
  z-index: 9998 !important;
  transform: translateX(-100%) !important;
  transition: transform 0.3s ease !important;
  overflow-y: auto !important;
  padding-top: 28px !important;
}

#quarto-sidebar.active {
  transform: translateX(0) !important;
}

/* Override Bootstrap collapse - force content to show */
#quarto-sidebar.collapse {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
}

#quarto-sidebar.collapse.show {
  display: block !important;
}

#quarto-sidebar .collapse {
  display: block !important;
}

#quarto-sidebar .sidebar-section.collapse {
  display: block !important;
}

/* Hide Quarto's original sidebar elements */
#quarto-sidebar-glass,
.sidebar-collapse-container,
.quarto-sidebar-collapse-item {
  display: none !important;
}

/* Style sidebar contents to match reader theme */
#quarto-sidebar .sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
}

#quarto-sidebar .sidebar-title {
  color: var(--text-primary);
  font-family: var(--font-title);
}

#quarto-sidebar .sidebar-menu-container {
  padding: 0;
}

#quarto-sidebar .sidebar-item {
  border-bottom: 1px solid var(--border-color);
}

#quarto-sidebar .sidebar-link {
  display: block;
  padding: 12px 16px;
  color: var(--text-secondary) !important;
  text-decoration: none;
  font-size: 14px;
  transition: background-color 0.2s, color 0.2s;
}

#quarto-sidebar .sidebar-link:hover {
  background: var(--bg-secondary);
  color: var(--text-primary) !important;
}

#quarto-sidebar .sidebar-item-section .sidebar-item-toggle {
  display: block;
  padding: 12px 16px;
  color: var(--text-primary) !important;
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
}

#quarto-sidebar .sidebar-section {
  padding-left: 0;
}

#quarto-sidebar .sidebar-section .sidebar-link {
  padding-left: 32px;
  font-size: 13px;
}

#quarto-sidebar .current-sidebar-item {
  background: var(--bg-secondary);
  color: var(--link-color) !important;
  border-left: 3px solid var(--link-color);
}

/* TOC overlay */
#reader-toc-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9997;
  display: none;
}

#reader-toc-overlay.active {
  display: block;
}

/* TOC close button */
#reader-toc-close {
  position: fixed;
  top: 8px;
  right: 8px;
  width: 32px;
  height: 32px;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

/* ========== LOADING STATE ========== */
body.loading {
  opacity: 0.7;
}

/* ========== FOOTER & NAVIGATION ========== */

/* Hide footer completely */
footer.footer,
footer .nav-footer,
footer .nav-footer-left,
footer .nav-footer-center,
footer .nav-footer-right,
.footer-items {
  display: none !important;
}

/* Page navigation - keep it visible but clean */
nav.page-navigation {
  display: none !important;
}

#reader-nav-arrows {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 2rem;
  padding-bottom: 60px;
  border-top: 1px solid var(--border-color);
}

#reader-nav-arrows button#nav-prev,
#reader-nav-arrows button#nav-next {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 110px;
  height: 56px;
  padding: 0 1.5rem;
  border-radius: 28px;
  background-color: #e5e5e5;
  color: #2c2c2c;
  font-family: 'Inter', sans-serif;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

#reader-nav-arrows button#nav-prev:hover,
#reader-nav-arrows button#nav-next:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

#reader-nav-arrows button#nav-prev:active,
#reader-nav-arrows button#nav-next:active {
  transform: scale(0.98);
}

[data-theme="dark"] #reader-nav-arrows button#nav-prev,
[data-theme="dark"] #reader-nav-arrows button#nav-next {
  background-color: #2c2c2c;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] #reader-nav-arrows button#nav-prev:hover,
[data-theme="dark"] #reader-nav-arrows button#nav-next:hover {
  color: #ffffff;
}

#reader-nav-arrows .nav-arrow {
  font-size: 32px;
  font-weight: 300;
}

#reader-nav-arrows button#nav-prev.disabled,
#reader-nav-arrows button#nav-next.disabled {
  opacity: 0.3;
  pointer-events: none;
  cursor: default;
}

#reader-nav-arrows button#nav-prev.disabled:hover,
#reader-nav-arrows button#nav-next.disabled:hover {
  transform: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] #reader-nav-arrows button#nav-prev.disabled:hover,
[data-theme="dark"] #reader-nav-arrows button#nav-next.disabled:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* ========== CODE IMPROVEMENTS ========== */
main.content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background-color: var(--bg-secondary) !important;
  color: var(--text-primary);
  padding: 0.2em 0.4em;
  border-radius: 4px;
}

main.content pre {
  background-color: var(--bg-secondary) !important;
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-color);
}

main.content pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

/* ========== PRINT STYLES ========== */
@media print {
  .reader-controls {
    display: none !important;
  }
  
  main.content,
  #quarto-content,
  .page-layout-article,
  .page-rows-contents {
    display: none !important;
  }
  
  body::after {
    content: "This free version is for web reading only. If you want an offline PDF and ePUB version to read, please support the author on https://books.apiad.net";
    display: block;
    padding: 3rem;
    font-size: 18px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    text-align: center;
    color: #333;
    line-height: 1.6;
    white-space: pre-wrap;
  }
}

/* ========== SCROLLBAR STYLING ========== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ========== SELECTION ========== */
::selection {
  background-color: var(--link-color);
  color: white;
}

/* ========== UPSELL MODAL ========== */
#reader-upsell-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.upsell-overlay {
  background: rgba(24, 24, 27, 0.95);
  padding: 2.5rem;
  border-radius: 1rem;
  max-width: 480px;
  text-align: center;
  border: 1px solid #3f3f46;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.upsell-content h3 {
  color: #f97316;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.upsell-content p {
  color: #a1a1aa;
  margin-bottom: 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
}

.upsell-cta {
  font-size: 0.9rem !important;
  color: #71717a !important;
  margin-top: 1rem !important;
}

.upsell-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.upsell-btn-primary {
  display: block;
  background: #f97316;
  color: white;
  padding: 1rem;
  border-radius: 0.75rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.upsell-btn-primary:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 20px rgba(249, 115, 22, 0.3);
}

.upsell-btn-secondary {
  display: block;
  background: linear-gradient(135deg, #8b5cf6, #9333ea);
  color: white;
  padding: 1rem;
  border-radius: 0.75rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.upsell-btn-secondary:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.upsell-btn-dismiss {
  background: transparent;
  color: #71717a;
  border: 1px solid #3f3f46;
  padding: 0.75rem;
  border-radius: 0.75rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: color 0.2s, border-color 0.2s;
}

.upsell-btn-dismiss:hover {
  color: #a1a1aa;
  border-color: #52525b;
}

/* ========== PROGRESS BAR ========== */
#reader-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: calc(28px + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  z-index: 9998;
  display: flex;
  align-items: center;
  padding-left: 1rem;
  padding-right: 1rem;
  gap: 0.75rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-ui);
  transform: translateZ(0);
}

#reader-progress .reader-progress-bar {
  flex: 1;
  height: 3px;
  background: var(--border-color);
  border-radius: 2px;
  overflow: hidden;
}

#reader-progress .reader-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-color);
  transition: width 0.1s ease-out;
}

#reader-progress .reader-progress-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 55px;
}