:root {
  /* Default Dark Theme - unified with player.html & index.html */
  --bg-main: #141414;
  --bg-pane: #1b1b1b;
  --bg-tracks: #181818;
  --bg-hover: #262626;
  --bg-active: #303030;
  --text-main: #e3e3dc;
  --text-muted: #95968f;
  --accent: #ff5252;
  --accent-hover: #ff7b7b;
  --border: #2a2a2a;
  --danger: #cf6679;

  --btn-primary-text: #ffffff;
  --card-bg: #202020;
  --card-shadow: rgba(0, 0, 0, 0.4);
  --track-card-bg: #202020;
  --track-card-active: #101010;
  --track-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --thumb-bg: #222222;
  --thumb-placeholder: rgba(255, 255, 255, 0.06);
  --table-header-bg: #181818;
  --table-row-hover: #282828;
  --table-playing-bg: rgba(255, 82, 82, 0.16);
  --context-menu-bg: #242424;
  --context-menu-shadow: rgba(0, 0, 0, 0.6);
  --scrollbar-thumb: #555555;
  --scrollbar-thumb-hover: #777777;
  --selection-bg: #37383a;
  --chat-user-bg: rgba(255, 82, 82, 0.12);
  --chat-user-border: rgba(255, 82, 82, 0.22);
  --link-color: #ff5252;
  --link-hover: #ff7b7b;
  --link-underline: rgba(255, 82, 82, 0.4);
  --left-sidebar-w: 320px;
}

@media (min-width: 1024px) {
  :root {
    --left-sidebar-w: 340px;
  }
}

@media (prefers-color-scheme: light) {
  :root {
    /* Clean Modern Light Theme - unified with player.html & index.html */
    --bg-main: #f7f7f9;
    --bg-pane: #f7f7f9;
    --bg-tracks: #ffffff;
    --track-card-bg: #f7f7f9;
    --track-card-active: #ffffff;
    --track-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    --bg-hover: #efeff2;
    --bg-active: #e5e5ea;
    --text-main: #111111;
    --text-muted: #555555;
    --accent: #d32f2f;
    --accent-hover: #b71c1c;
    --border: #e5e5ea;
    --danger: #dc2626;

    --btn-primary-text: #ffffff;
    --card-bg: #ffffff;
    --card-shadow: rgba(0, 0, 0, 0.08);
    --thumb-bg: #ebebf0;
    --thumb-placeholder: rgba(0, 0, 0, 0.05);
    --table-header-bg: #f5f5f7;
    --table-row-hover: #fafafc;
    --table-playing-bg: rgba(211, 47, 47, 0.08);
    --context-menu-bg: #ffffff;
    --context-menu-shadow: rgba(0, 0, 0, 0.15);
    --scrollbar-thumb: #c7c7cc;
    --scrollbar-thumb-hover: #8e8e93;
    --selection-bg: #dbeafe;
    --chat-user-bg: rgba(211, 47, 47, 0.08);
    --chat-user-border: rgba(211, 47, 47, 0.18);
    --link-color: #d32f2f;
    --link-hover: #b71c1c;
    --link-underline: rgba(211, 47, 47, 0.35);
  }
}

* {
  box-sizing: border-box;
}

::selection {
  background-color: var(--selection-bg);
  color: inherit;
}

body {
  font-family: ui-monospace, 'Cascadia Code', 'Cascadia Mono', 'Consolas', 'Menlo', 'Monaco', monospace;
  background-color: var(--bg-main);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

/* Links */
a {
  color: var(--link-color);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3.5px;
  text-decoration-color: var(--link-underline);
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
  color: var(--link-hover);
  text-decoration-color: var(--link-hover);
}

/* Form Controls: Borderless matching player.html */
input, textarea, select {
  border: none !important;
  outline: none !important;
  font-family: inherit;
}

input:focus, textarea:focus, select:focus {
  outline: none !important;
  box-shadow: none !important;
}

/* Player-style Buttons */
.btn-primary {
  background-color: var(--accent);
  color: var(--btn-primary-text);
  padding: 6px 14px;
  border-radius: 4px;
  font-weight: 600;
  font-family: inherit;
  transition: background-color 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  border: none;
}
.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-hover);
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background-color: var(--bg-hover);
  border: none;
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  transition: background-color 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
}
.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-active);
  color: var(--text-main);
}
.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-icon {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-icon:hover:not(:disabled) {
  color: var(--text-main);
  background-color: var(--bg-hover);
}

.badge {
  background-color: var(--bg-hover);
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 12px;
  border: none;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.app-brand-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 50px 50px 14px 50px;
}

/* Absolutely Positioned View Toggles in Top Padding Zone */
.view-toggle-btn {
  position: absolute;
  top: 10px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 11px;
  border: 1px solid var(--border);
  background-color: var(--card-bg);
  color: var(--text-muted);
  cursor: pointer;
  z-index: 35;
  transition: left 300ms cubic-bezier(0.4, 0, 0.2, 1), background-color 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}
.view-toggle-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-hover);
  border-color: var(--accent);
}
.view-toggle-btn.is-active {
  color: var(--accent);
  background-color: var(--card-bg);
}
.view-toggle-btn.is-collapsed {
  color: var(--text-muted);
  background-color: var(--bg-main);
  opacity: 0.85;
}
.view-toggle-btn.is-collapsed:hover {
  opacity: 1;
  color: var(--text-main);
  border-color: var(--accent);
}

/* Persistent Top-Right Workspace Controls in Top Padding Zone */
.workspace-top-controls {
  position: absolute;
  top: 10px;
  right: 14px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 28px;
}
.app-brand-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.2px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.app-brand-link {
  font-size: 0.76rem;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}
.app-brand-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* Backlink badge styling */
.kb-embedded-ref {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  margin: 0 2px;
  border-radius: 4px;
  background-color: rgba(255, 82, 82, 0.12);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.82em;
  cursor: pointer;
  transition: background-color 0.15s;
}
.kb-embedded-ref:hover {
  background-color: rgba(255, 82, 82, 0.22);
}

/* Taxonomy list collapsing transitions */
.tax-collapse-item {
  display: grid;
  transition: grid-template-rows 250ms cubic-bezier(0.4, 0, 0.2, 1), opacity 200ms ease;
}
.tax-collapse-item.is-visible {
  grid-template-rows: 1fr;
  opacity: 1;
}
.tax-collapse-item.is-visible > div {
  overflow: visible;
}
.tax-collapse-item.is-hidden {
  grid-template-rows: 0fr;
  opacity: 0;
  pointer-events: none;
}
.tax-collapse-item.is-hidden > div {
  overflow: hidden;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) transparent;
}

/* Neubrutalist Theme Overrides */
.theme-neubrutalist {
  background-color: #f3f4f6 !important;
}
.theme-neubrutalist * {
  border-radius: 0px !important;
}

/* MS-DOS WordStar Theme */
.theme-msdos * {
  border: none !important;
  border-radius: 0px !important;
  box-shadow: none !important;
  font-family: Menlo, Monaco, Consolas, monospace !important;
}
.theme-msdos {
  background-color: #000000 !important;
  color: #BDBDBD !important;
}
@keyframes focusFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes focusWindowIn {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(12px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}
.animate-focus-backdrop {
  animation: focusFadeIn 240ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.animate-focus-window {
  animation: focusWindowIn 260ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Responsive Prompt & Answer Summary Split Layout */
.note-reader-container {
  container-type: inline-size;
}
.prompt-split-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.prompt-split-card {
  flex: 1 1 270px;
  min-width: 270px;
  max-width: 100%;
}
@container (max-width: 580px) {
  .prompt-split-layout {
    flex-direction: column !important;
  }
  .prompt-split-card {
    flex: 1 1 100% !important;
    min-width: 100% !important;
  }
}

/* Markdown Prose & List Spacing */
.prose,
.prose-player {
  line-height: 1.4 !important;
}
.prose p,
.prose-player p {
  line-height: 1.4 !important;
}
.prose ul, .prose ol,
.prose-player ul, .prose-player ol {
  margin-top: 0.4em !important;
  margin-bottom: 0.4em !important;
  padding-left: 1.25em !important;
}
.prose li,
.prose-player li {
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  line-height: 1.4 !important;
  padding-left: 0 !important;
}
.prose li p, .prose li > p,
.prose-player li p, .prose-player li > p {
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  line-height: 1.4 !important;
  display: inline !important;
}
.prose ul ul, .prose ul ol, .prose ol ul, .prose ol ol,
.prose-player ul ul, .prose-player ul ol, .prose-player ol ul, .prose-player ol ol {
  margin-top: 0 !important;
  margin-bottom: 0 !important;
}