.slide {
  margin-top: 12px;
}

.slide.example {
  box-sizing: border-box;
  border: 0.2px dotted var(--border-color);
  width: 100%;
  height: 100%;
  display: flex;
  cursor: ew-resize;
  background: var(--bg-secondary);
}

.slide.example .code {
  margin-right: 0px;
  width: 65%;
  background: var(--bg-primary);
}

.slide.example .renderer {
  width: 35%;
  background: var(--bg-primary);
}

.slide .container-code,
.slide .container-renderer,
.slide.page {
  overflow: auto;
}

.slide.example .container-code {
  margin-top: 8px;
}

.slide.example .code,
.slide.example .renderer {
  display: flex;
  flex-direction: column;
  cursor: default;
}

.slide.example .navbar-renderer,
.slide.example .container-renderer {
  flex: 1 1 auto;
}

.slide.example .navbar-code,
.slide.example .navbar-renderer {
  height: 40px;
  /* width: 100%; */
  display: flex;
  list-style: none;
  padding: 2px;
  margin: 0;
  border-bottom: 1px solid var(--navbar-border);
  border-top: 1px solid var(--navbar-border);
  background: var(--navbar-bg);
  font-size: 0.8em;
  /* position: fixed; */
}

.slide.example .navbar-code li,
.slide.example .navbar-renderer li {
  min-width: 60px;
  /* border: 1px dotted gray; */
  /* background: #FFF; */
  margin: 4px;
  text-align: center;
  /* border-right: 1px solid #DDD; */
  /* border-bottom: 1px solid #DDD; */
  /* box-shadow: 1px 1px 1px #DDD; */
}

.slide.example .navbar-code li a,
.slide.example .navbar-renderer li a {
  display: block;
  padding: 2px 6px;
  text-decoration: none;
  font-weight: bold;
  font-family: Arial, Helvetica, sans-serif;
  /* color: orangered; */
  font-size: 0.8em;
}

.slide {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  right: 0;
}

.slide.example.current.left,
.slide.page.current.left {
  animation: fadeInLeft 500ms;
}

.slide.example.current.right,
.slide.page.current.right {
  animation: fadeInRight 500ms;
}

.slide.example.current .container-renderer {
  height: 100%;
  border-left: 0.5px solid var(--border-light);
}

.slide.example.current .renderer iframe {
  height: 96%;
  width: 100%;
}

.slide.example.current .container-code .html .CodeMirror,
.slide.example.current .container-code .css .CodeMirror,
.slide.example.current .container-code .js .CodeMirror {
  height: 96% !important;
}

.slide.example.current .container-code .intro .CodeMirror {
  height: 80% !important;
}

.slide.example.current .container-code>div.hide {
  display: none;
}

.slide.example .container-code,
.slide.example .container-renderer {
  /* margin-top: 50px; */
}

.slide.example.current .resizer {
  width: 0.4%;
  height: 100%;
  background: var(--resizer-bg);
}

@keyframes show {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    -webkit-transform: translate3d(-100%, 0, 0);
    transform: translate3d(-100%, 0, 0);
  }

  to {
    opacity: 1;
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    -webkit-transform: translate3d(100%, 0, 0);
    transform: translate3d(100%, 0, 0);
  }

  to {
    opacity: 1;
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
  }
}

/* Poppup template */

.outer {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background: var(--bg-overlay);
  z-index: 1000;
  font-size: 0.7em;
}

.outer .inner {
  z-index: 1001;
  position: fixed;
  left: 10%;
  right: 10%;
  top: 10%;
  bottom: 10%;
  background: var(--modal-bg);
  color: var(--text-primary);
  padding: 6px 12px;
  border: 3px double var(--border-color);
}

.outer .inner .navbar {
  list-style: none;
  display: flex;
  flex-direction: row-reverse;
}

.outer .inner .navbar button {
  min-width: 50px;
}

.inner .libraries {
  display: table;
  border-top: 0.7px dotted var(--border-dark);
  border-left: 0.7px dotted var(--border-dark);
}

.inner .libraries .library {
  display: table-row;
}

.inner .libraries .library>* {
  display: table-cell;
  padding: 4px 10px;
  border-bottom: 0.1px dotted var(--border-dark);
  border-right: 0.1px dotted var(--border-dark);
  vertical-align: middle;
}

/* Add library form */
.add-library-form {
  padding: 12px 0;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.add-library-form .form-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.add-library-form .form-control {
  flex: 1;
  padding: 6px 10px;
  font-size: 0.9em;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.add-library-form .lib-name {
  flex: 0.8;
}

.add-library-form .lib-url {
  flex: 2;
}

.add-library-form .lib-version {
  flex: 0.5;
}

.add-library-form .form-control::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.add-library-form .form-control:focus {
  outline: none;
  border-color: var(--accent-color, #007bff);
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.15);
}

.add-library-form .add-new-lib {
  flex-shrink: 0;
  padding: 6px 12px;
}

/* Remove library button */
.library .remove-lib {
  padding: 2px 8px;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.library .remove-lib:hover {
  opacity: 1;
}

/* Custom library indicator */
.library.custom-lib .name::before {
  content: '★ ';
  color: var(--accent-color, #007bff);
}

/* Libraries navbar */
.libs-navbar {
  margin-bottom: 8px;
  gap: 8px;
}

.libs-navbar button {
  margin-left: 4px;
}

/* Libraries container scroll */
.inner .libraries {
  max-height: calc(100% - 140px);
  overflow-y: auto;
}

#progress {
  /* opacity: 0.7; */
  height: 5px;
  position: fixed;
  left: 0;
  right: 0;
  top: 3px;
  border-radius: 0;
  z-index: 2099;
}

#progress .progress-bar {
  box-sizing: border-box;
  border-right: 2px solid white;
}

#top:hover #progress,
#top:hover #grad {
  height: 16px;
}

#top:hover #progress {
  top: 0;
}

#top:hover {
  cursor: pointer;
}

#top:hover #grad {
  opacity: 1;
}

#top .grad:hover {
  color: white;
}

#numSlides {
  position: fixed;
  width: 60px;
  height: 30px;
  bottom: 0;
  right: 0;
  font-size: 0.5em;
  padding: 4px 8px;
}

#help {
  opacity: 0.3;
  position: fixed;
  /* width: 160px; */
  height: 1.5rem;
  bottom: 1.3rem;
  left: 1rem;
  font-size: 0.5em;
  padding: 4px 8px;
  z-index: 2000;
}

#help:hover {
  opacity: 1;
}

.CodeMirror pre {
  padding: 0 10px;
}

#grad {
  display: flex;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9200;
  opacity: 0;
  border-bottom: 0.5px solid var(--border-dark);
}

#grad .grad {
  box-sizing: border-box;
  color: var(--text-muted);
  font-size: 0.4em;
  text-align: center;
  z-index: 9300;
  border-left: 0.5px solid var(--border-color);
  /* position: relative; */
  /* display: none; */
}

#tooltip {
  position: absolute;
  padding: 6px;
  border: 1px solid var(--border-color);
  font-size: 0.8em;
  opacity: 0.7;
  background: var(--bg-primary);
  color: var(--text-primary);
}

#ytIframe {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100vh;
}

#ytOverlay {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 40px;
  background-color: rgba(156, 48, 48, 0.5);
}

/* ===========================================
   Overview Mode - Grid view of all slides
   =========================================== */

body.overview-mode {
  overflow: auto;
}

body.overview-mode .slides {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding: 30px;
  height: auto;
  min-height: 100vh;
}

body.overview-mode .slide {
  position: relative !important;
  height: 200px !important;
  margin: 0 !important;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  background: var(--bg-primary);
}

body.overview-mode .slide:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 24px var(--shadow-strong);
  border-color: var(--progress-fill);
}

body.overview-mode .slide.hide {
  display: block !important;
}

body.overview-mode .slide.current {
  border-color: var(--progress-fill);
  box-shadow: 0 0 0 3px var(--progress-fill);
}

body.overview-mode .slide.example {
  flex-direction: column;
}

body.overview-mode .slide.example .code,
body.overview-mode .slide.example .renderer,
body.overview-mode .slide.example .resizer {
  display: none;
}

body.overview-mode .slide.page {
  padding: 10px;
  font-size: 0.5em;
}

body.overview-mode .slide::after {
  content: attr(data-slide-num);
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: var(--bg-overlay);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7em;
  font-weight: bold;
}

body.overview-mode #progress,
body.overview-mode #grad,
body.overview-mode #help,
body.overview-mode #numSlides {
  display: none !important;
}

/* ===========================================
   Slide Preview on hover (progress bar)
   =========================================== */

#grad .grad {
  position: relative;
}

#grad .grad .slide-preview {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 140px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: 6px;
  box-shadow: 0 4px 16px var(--shadow-strong);
  overflow: hidden;
  z-index: 9500;
  pointer-events: none;
}

#grad .grad .slide-preview::after {
  content: attr(data-preview-num);
  position: absolute;
  bottom: 4px;
  right: 4px;
  background: var(--bg-overlay);
  color: #fff;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.8em;
}

#top:hover #grad .grad:hover .slide-preview {
  display: block;
}

#grad .grad .slide-preview-content {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-size: 0.4em;
  padding: 4px;
  background: var(--bg-primary);
}

/* ===========================================
   Keyboard Shortcuts Modal
   =========================================== */

.shortcuts-modal {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.shortcuts-content {
  background: var(--modal-bg);
  color: var(--text-primary);
  border-radius: 12px;
  box-shadow: 0 20px 60px var(--shadow-strong);
  max-width: 500px;
  width: 90%;
  max-height: 85vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.3s ease;
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.shortcuts-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.shortcuts-header h3 {
  margin: 0;
  font-size: 1.1em;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.shortcuts-header h3 i {
  color: var(--progress-fill);
}

.shortcuts-close {
  background: none;
  border: none;
  font-size: 1.8em;
  cursor: pointer;
  color: var(--text-secondary);
  line-height: 1;
  padding: 0 5px;
  transition: color 0.2s;
}

.shortcuts-close:hover {
  color: var(--text-primary);
}

.shortcuts-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

.shortcuts-section {
  margin-bottom: 20px;
}

.shortcuts-section:last-child {
  margin-bottom: 0;
}

.shortcuts-section h4 {
  margin: 0 0 12px 0;
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 6px;
}

.shortcut-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 0.9em;
}

.shortcut-keys {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.shortcut-keys kbd {
  background: var(--kbd-bg);
  color: var(--kbd-text);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: inherit;
  box-shadow: 0 2px 0 var(--shadow-color);
}

.shortcut-desc {
  color: var(--text-secondary);
  text-align: right;
}

.shortcuts-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.shortcuts-hint {
  font-size: 0.8em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.shortcuts-hint::before {
  content: '💡';
}

/* ===========================================
   Mobile Responsive Styles
   =========================================== */

@media (max-width: 768px) {

  /* Stack code and renderer vertically */
  .slide.example {
    flex-direction: column;
  }

  .slide.example .code,
  .slide.example .renderer {
    width: 100% !important;
    height: 50% !important;
  }

  .slide.example .resizer {
    width: 100%;
    height: 10px;
    cursor: ns-resize;
    background: var(--resizer-bg);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .slide.example .resizer::after {
    content: '';
    width: 40px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
  }

  /* Wrap navbar items */
  .slide.example .navbar-code,
  .slide.example .navbar-renderer {
    flex-wrap: wrap;
    height: auto;
    min-height: 40px;
    padding: 4px;
  }

  .slide.example .navbar-code li,
  .slide.example .navbar-renderer li {
    min-width: auto;
    margin: 2px;
  }

  .slide.example .navbar-code li a,
  .slide.example .navbar-renderer li a {
    padding: 4px 8px;
    font-size: 0.75em;
  }

  /* Help buttons */
  #help {
    bottom: 0.5rem;
    left: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }

  #help .btn {
    padding: 4px 8px;
  }

  /* Progress bar */
  #numSlides {
    font-size: 0.45em;
    padding: 2px 6px;
  }

  /* Overview mode */
  body.overview-mode .slides {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    padding: 15px;
  }

  body.overview-mode .slide {
    height: 150px !important;
  }

  /* Shortcuts modal */
  .shortcuts-content {
    width: 95%;
    max-height: 90vh;
  }

  .shortcuts-body {
    padding: 15px;
  }

  .shortcut-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .shortcut-desc {
    text-align: left;
    font-size: 0.85em;
  }
}

@media (max-width: 480px) {

  /* Hide text labels, show only icons */
  .slide.example .navbar-code li a span,
  .slide.example .navbar-renderer li a span {
    display: none;
  }

  .slide.example .navbar-code li a i,
  .slide.example .navbar-renderer li a i {
    font-size: 1.1em;
    margin: 0;
  }

  .slide.example .navbar-code li,
  .slide.example .navbar-renderer li {
    min-width: 36px;
  }

  /* Smaller help buttons */
  #help .btn {
    padding: 3px 6px;
    font-size: 0.8em;
  }

  /* Smaller overview tiles */
  body.overview-mode .slides {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 8px;
    padding: 10px;
  }

  body.overview-mode .slide {
    height: 120px !important;
  }

  body.overview-mode .slide::after {
    font-size: 0.6em;
    padding: 1px 5px;
  }
}

/* Touch-friendly button sizes */
@media (pointer: coarse) {
  .btn {
    min-height: 44px;
    min-width: 44px;
  }

  .slide.example .navbar-code li a,
  .slide.example .navbar-renderer li a {
    padding: 10px 12px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  #help .btn {
    min-height: 40px;
    min-width: 40px;
  }

  .shortcuts-close {
    min-width: 44px;
    min-height: 44px;
  }
}

/* ===========================================
   Skip Link for Accessibility
   =========================================== */

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--progress-fill);
  color: white;
  padding: 10px 20px;
  z-index: 100000;
  text-decoration: none;
  font-weight: bold;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
}

/* ===========================================
   Focus Visible Styles
   =========================================== */

:focus-visible {
  outline: 2px solid var(--progress-fill);
  outline-offset: 2px;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px var(--progress-fill);
}