/* ===========================================
   Backend Principle, Enhancements
   =========================================== */

/* ---------- Global Code Block Fix ---------- */
/* Some chapters style `code` with a light bg + padding meant for inline snippets.
   This resets those styles when `code` is inside a `pre` block so the dark
   code-block background shows through correctly. */

/* ---------- Search Modal ---------- */
.search-overlay{position:fixed;inset:0;background:rgba(33,30,26,.55);backdrop-filter:blur(6px);z-index:10001;display:flex;align-items:flex-start;justify-content:center;padding-top:min(18vh,160px);opacity:0;pointer-events:none;transition:opacity .2s ease;}
.search-overlay.open{opacity:1;pointer-events:auto;}
.search-modal{width:min(580px,92vw);background:#f8f3ea;border:1px solid #c7bca6;border-radius:14px;box-shadow:0 24px 64px -16px rgba(40,30,20,.45);overflow:hidden;transform:translateY(-12px) scale(.97);transition:transform .2s ease;}
.search-overlay.open .search-modal{transform:translateY(0) scale(1);}
.search-input-wrap{display:flex;align-items:center;gap:10px;padding:16px 20px;border-bottom:1px solid #d8cfbe;}
.search-input-wrap svg{flex:none;color:#8d8475;}
.search-input{flex:1;border:none;background:transparent;font-family:"Spline Sans",sans-serif;font-size:19px;color:#211e1a;outline:none;}
.search-input::placeholder{color:#8d8475;}
.search-kbd{font-family:"JetBrains Mono",monospace;font-size:13px;color:#8d8475;background:rgba(0,0,0,.06);border:1px solid #d8cfbe;border-radius:6px;padding:3px 8px;flex:none;}
.search-results{max-height:340px;overflow-y:auto;padding:6px 0;}
.search-results:empty::after{content:"Type to search chapters and topics...";display:block;padding:24px 18px;text-align:center;color:#8d8475;font-size:16px;font-style:italic;}
.search-result{display:flex;align-items:center;gap:14px;padding:12px 20px;cursor:pointer;text-decoration:none;color:var(--ink);transition:background .15s;}
.search-result:hover,.search-result.active{background:rgba(var(--accent-rgb),.08);}
.search-result .sr-num{font-family:"JetBrains Mono",monospace;font-size:14px;font-weight:700;color:var(--accent);background:rgba(var(--accent-rgb),.1);border-radius:7px;width:34px;height:34px;display:flex;align-items:center;justify-content:center;flex:none;}
.search-result .sr-title{font-family:"Fraunces",serif;font-weight:600;font-size:17px;}
.search-result .sr-meta{font-size:14px;color:var(--ink-soft);margin-left:auto;flex:none;font-family:"JetBrains Mono",monospace;}
.search-no-results{padding:28px 18px;text-align:center;color:var(--ink-soft);font-size:16px;}

/* ---------- Search Trigger ---------- */
.search-trigger{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.45);border:1px solid #c7bca6;border-radius:8px;padding:9px 16px;cursor:pointer;transition:all .2s;font-family:"JetBrains Mono",monospace;font-size:14px;color:#5b5347;flex:none;}
.search-trigger:hover{background:rgba(255,255,255,.7);border-color:var(--accent);color:var(--accent);}
.search-trigger svg{flex:none;}

/* ---------- Progress Tracker ---------- */
.progress-pill{font-family:"JetBrains Mono",monospace;font-size:14px;color:#3f6f4e;border:1px solid #3f6f4e;border-radius:40px;padding:9px 20px;background:rgba(63,111,78,.06);}
.progress-pill b{font-weight:700;}

/* ---------- Chapter Row (wraps checkbox + card) ---------- */
.chapter-row{display:flex;align-items:center;gap:8px;}
.ch-done-btn{width:30px;height:30px;border-radius:8px;border:2px solid #d8cfbe;background:transparent;cursor:pointer;flex:none;display:flex;align-items:center;justify-content:center;transition:all .2s;padding:0;}
.ch-done-btn:hover{border-color:#3f6f4e;background:rgba(63,111,78,.08);}
.ch-done-btn.done{border-color:#3f6f4e;background:#3f6f4e;}
.ch-done-btn .check-svg{display:none;width:14px;height:14px;}
.ch-done-btn.done .check-svg{display:block;}
.chapter-row .chapter-card{flex:1;}

/* ---------- Card Meta (read time) ---------- */
.card-info{display:flex;flex-direction:column;gap:2px;flex:1;min-width:0;}
.card-meta{font-family:"JetBrains Mono",monospace;font-size:11px;color:#8d8475;font-weight:500;}

/* ---------- Reading Progress Bar (chapter pages) ---------- */
.reading-progress-bar{position:fixed;top:0;left:0;height:3px;background:var(--accent);z-index:10000;transition:width 80ms ease-out;box-shadow:0 0 8px rgba(var(--accent-rgb),.45);pointer-events:none;}

/* ---------- Code Runner ---------- */
.code-run-wrap{display:flex;align-items:center;justify-content:flex-end;gap:8px;padding:6px 12px;background:#1a1813;border-top:1px solid rgba(255,255,255,.05);}
.code-run-btn{display:inline-flex;align-items:center;gap:6px;background:rgba(var(--accent-rgb),.14);color:var(--accent);border:1px solid rgba(var(--accent-rgb),.25);border-radius:6px;padding:5px 14px;font-family:"JetBrains Mono",monospace;font-size:12px;font-weight:600;cursor:pointer;transition:all .2s;}
.code-run-btn:hover{background:rgba(var(--accent-rgb),.22);color:#ffffff;border-color:rgba(var(--accent-rgb),.45);}
.code-run-btn.loading{opacity:.55;cursor:wait;}
.code-playground-link{display:inline-flex;align-items:center;gap:6px;color:#7fb0c9;text-decoration:none;font-family:"JetBrains Mono",monospace;font-size:12px;font-weight:600;padding:5px 14px;border-radius:6px;border:1px solid rgba(128,176,208,.18);transition:all .2s;}
.code-playground-link:hover{background:rgba(128,176,208,.08);border-color:rgba(128,176,208,.35);}
.code-output-panel{background:#0d0e11;border-top:1px solid rgba(255,255,255,.05);padding:10px 14px;font-family:"JetBrains Mono",monospace;font-size:12px;line-height:1.55;color:#a8e6a0;max-height:200px;overflow-y:auto;white-space:pre-wrap;overflow-wrap:anywhere;}
.code-output-panel.error{color:#f0a0a0;}

/* ============================================================================
   MULTI-THEME TOKEN SYSTEM — Three Core Themes
   ============================================================================ */

/* ─────────────────────────────────────────────────────────────────────────
   ORIGINAL / DEFAULT (Warm Editorial Parchment)
   ───────────────────────────────────────────────────────────────────────── */
:root,
:root[data-theme="default"],
:root[data-theme="neutral"],
:root[data-theme="paper"] {
  /* Backgrounds */
  --paper:         #f3ede2;
  --paper-2:       #ece3d4;
  --paper-3:       #e6dcca;

  /* Text & Ink */
  --ink:           #211e1a;
  --ink-soft:      #5b5347;
  --ink-faint:     #8d8475;

  --accent:        #b8402e;
  --accent-2:      #8f2f20;
  --accent-rgb:    184, 64, 46;
  --accent-hover:  #8f2f20;
  --rust:          #b8402e;
  --rust-deep:     #8f2f20;
  --green:         #3f6f4e;
  --teal:          #3f6f4e;
  --blue:          #37607f;
  --gold:          #b07d2b;

  /* Dividers & Borders */
  --line:          #d8cfbe;
  --line-strong:   #c7bca6;

  /* Code & Technical */
  --code-bg:       #232019;
  --code-bar:      #1a1813;
  --code-line:     #35302a;
  --code-ink:      #e9e2d3;
  --code-faint:    #9c948a;

  /* Components */
  --surface-card:  rgba(255, 255, 255, 0.45);
  --surface-card-hover: rgba(255, 255, 255, 0.75);

  /* Effects */
  --shadow:        0 1px 0 rgba(0,0,0,.04), 0 18px 40px -28px rgba(40, 30, 20, 0.5);
  --shadow-elevated: 0 12px 30px -10px rgba(40, 30, 20, 0.25);

  /* Highlights */
  --hl-rust:       rgba(184, 64, 46, 0.16);
  --hl-amber:      rgba(176, 125, 43, 0.18);
  --hl-emerald:    rgba(63, 111, 78, 0.16);

  /* Original Typography */
  --bfp-font-display: "Fraunces", Georgia, serif;
  --bfp-font-body: "Spline Sans", system-ui, sans-serif;
  --bfp-font-mono: "JetBrains Mono", ui-monospace, monospace;

  --bfp-paper: var(--paper); --bfp-paper-2: var(--paper-2); --bfp-paper-3: var(--paper-3);
  --bfp-ink: var(--ink); --bfp-ink-soft: var(--ink-soft); --bfp-ink-faint: var(--ink-faint);
  --bfp-accent: var(--accent); --bfp-accent-2: var(--accent-2);
  --bfp-line: var(--line); --bfp-line-strong: var(--line-strong);
  --bfp-code-bg: var(--code-bg); --bfp-code-bar: var(--code-bar); --bfp-code-line: var(--code-line);
  --bfp-code-ink: var(--code-ink); --bfp-code-faint: var(--code-faint);
}

/* ─────────────────────────────────────────────────────────────────────────
   LIGHT (Full White)
   ───────────────────────────────────────────────────────────────────────── */
:root[data-theme="light"] {
  /* Backgrounds */
  --paper:         #ffffff;
  --paper-2:       #fafafa;
  --paper-3:       #f5f5f5;

  /* Text & Ink */
  --ink:           #000000;
  --ink-soft:      #333333;
  --ink-faint:     #999999;

  /* Accents & Interactive */
  --accent:        #0969da;
  --accent-2:      #0550ae;
  --accent-rgb:    9, 105, 218;
  --accent-hover:  #0550ae;
  --surface-card-hover: #f0f3f6;
  --rust:          #0066cc;
  --rust-deep:     #0052a3;
  --green:         #00b464;
  --teal:          #00b464;
  --blue:          #0066cc;
  --gold:          #ffb400;

  /* Dividers & Borders */
  --line:          #e0e0e0;
  --line-strong:   #cccccc;

  /* Code & Technical */
  --code-bg:       #1f1f1f;
  --code-bar:      #161616;
  --code-line:     #2c2c2c;
  --code-ink:      #ffffff;
  --code-faint:    #888888;

  /* Components */
  --surface-card:  #ffffff;

  /* Effects */
  --shadow:        0 1px 0 rgba(0,0,0,.04), 0 18px 40px -28px rgba(0, 0, 0, 0.1);
  --shadow-elevated: 0 12px 30px -10px rgba(0, 0, 0, 0.1);

  /* Highlights */
  --hl-rust:       rgba(0, 102, 204, 0.14);
  --hl-amber:      rgba(255, 180, 0, 0.16);
  --hl-emerald:    rgba(0, 180, 100, 0.14);

  --bfp-paper: var(--paper); --bfp-paper-2: var(--paper-2); --bfp-paper-3: var(--paper-3);
  --bfp-ink: var(--ink); --bfp-ink-soft: var(--ink-soft); --bfp-ink-faint: var(--ink-faint);
  --bfp-accent: var(--accent); --bfp-accent-2: var(--accent-2);
  --bfp-line: var(--line); --bfp-line-strong: var(--line-strong);
  --bfp-code-bg: var(--code-bg); --bfp-code-bar: var(--code-bar); --bfp-code-line: var(--code-line);
  --bfp-code-ink: var(--code-ink); --bfp-code-faint: var(--code-faint);
}

/* ─────────────────────────────────────────────────────────────────────────
   DARK — supplementary tokens only.

   assets/theme.css loads after this file and owns the dark palette proper
   (paper/ink/accent/line/code/shadow and the --bfp-* aliases). Declaring them
   again here produced a second, conflicting palette, so this block is limited
   to the tokens theme.css does not define, tuned to match it.
   ───────────────────────────────────────────────────────────────────────── */
:root[data-theme="dark"] {
  --rust:          #ff7a6b;
  --rust-rgb:      255, 122, 107;
  --rust-deep:     #f2604f;
  --teal:          var(--green);
  --code-line:     #3d332b;

  --surface-card:  var(--paper-2);
  --surface-card-hover: var(--paper-3);

  --shadow-elevated: 0 16px 40px -12px rgba(12, 7, 3, .75);

  --hl-rust:       rgba(255, 122, 107, .28);
  --hl-amber:      rgba(240, 160, 60, .28);
  --hl-emerald:    rgba(143, 206, 135, .25);
}

/* Theme Smooth Transitions */
html.theme-transitioning,
html.theme-transitioning *,
html.theme-transitioning *:before,
html.theme-transitioning *:after {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, fill 0.25s ease, stroke 0.25s ease !important;
  transition-delay: 0s !important;
}

/* Theme UI Overrides for Homepage & Chapters */
:root[data-theme="dark"] body {
  background-color: var(--paper) !important;
  color: var(--ink) !important;
  background-image: none !important;
}
:root[data-theme="dark"] body::before {
  mix-blend-mode: screen !important;
  opacity: .015 !important;
}
:root[data-theme="dark"] .chapter-card,
:root[data-theme="dark"] .community-card,
:root[data-theme="dark"] .stat {
  background: var(--surface-card) !important;
  border-color: var(--line) !important;
  color: var(--ink) !important;
}
:root[data-theme="dark"] .chapter-card:hover {
  background: var(--surface-card-hover) !important;
  border-color: var(--accent) !important;
}
:root[data-theme="dark"] .card-title,
:root[data-theme="dark"] .community-title {
  color: var(--ink) !important;
}
:root[data-theme="dark"] .search-modal {
  background: var(--paper-2) !important;
  border-color: var(--line-strong) !important;
  box-shadow: 0 24px 64px -16px rgba(0,0,0,.9) !important;
}
:root[data-theme="dark"] .search-input {
  color: var(--ink) !important;
}
:root[data-theme="dark"] .search-result {
  color: var(--ink) !important;
}
:root[data-theme="dark"] .search-result:hover,
:root[data-theme="dark"] .search-result.active {
  background: rgba(var(--accent-rgb), 0.12) !important;
}
:root[data-theme="dark"] .search-trigger {
  background: var(--surface-card) !important;
  border-color: var(--line-strong) !important;
  color: var(--ink-soft) !important;
}
:root[data-theme="dark"] .bfp-toc {
  background: linear-gradient(180deg, var(--paper-2), var(--paper)) !important;
  border-color: var(--line) !important;
}
:root[data-theme="dark"] .bfp-brand,
:root[data-theme="dark"] .bfp-brand-lens {
  color: var(--ink) !important;
}

/* Light Theme Overrides */
:root[data-theme="light"] body {
  background-color: var(--paper);
  color: var(--ink);
  background-image: none !important;
}
:root[data-theme="light"] .chapter-card,
:root[data-theme="light"] .community-card,
:root[data-theme="light"] .stat {
  background: var(--surface-card) !important;
  border-color: var(--line) !important;
  color: var(--ink) !important;
}
:root[data-theme="light"] .chapter-card:hover {
  background: var(--surface-card-hover) !important;
  border-color: var(--accent) !important;
}
:root[data-theme="light"] .card-title,
:root[data-theme="light"] .community-title {
  color: var(--ink) !important;
}
:root[data-theme="light"] .search-modal {
  background: #ffffff !important;
  border-color: var(--line-strong) !important;
}
:root[data-theme="light"] .search-input,
:root[data-theme="light"] .search-result {
  color: var(--ink) !important;
}
:root[data-theme="light"] .search-trigger {
  background: #ffffff !important;
  border-color: var(--line-strong) !important;
  color: var(--ink-soft) !important;
}
:root[data-theme="light"] .bfp-toc {
  background: #ffffff !important;
  border-color: var(--line) !important;
}


/* ==========================================================================
   COMPREHENSIVE DARK THEME SYSTEM (Obsidian Edition)
   ========================================================================== */

/* Code Blocks & Cards */
:root[data-theme="dark"] .codecard,
:root[data-theme="dark"] .codeblock,
:root[data-theme="dark"] .codeduo .codecard {
  background: var(--code-bg) !important;
  border-color: var(--line) !important;
  box-shadow: 0 14px 36px -12px rgba(0, 0, 0, 0.8) !important;
}
:root[data-theme="dark"] .codebar,
:root[data-theme="dark"] .code-bar {
  background: var(--code-bar) !important;
  border-bottom: 1px solid var(--line) !important;
}
:root[data-theme="dark"] .codebar .fname {
  color: var(--ink-soft) !important;
}
:root[data-theme="dark"] .codebar .dot {
  background: var(--line-strong) !important;
}
:root[data-theme="dark"] .langtag,
:root[data-theme="dark"] .langtag.go,
:root[data-theme="dark"] .langtag.py,
:root[data-theme="dark"] .langtag.sql {
  background: var(--line) !important;
  border: 1px solid var(--line-strong) !important;
}
:root[data-theme="dark"] .langtag.go { color: #79c0ff !important; }
:root[data-theme="dark"] .langtag.py { color: #d2a8ff !important; }
:root[data-theme="dark"] .langtag.sql { color: #f2cc60 !important; }

:root[data-theme="dark"] .codecard pre,
:root[data-theme="dark"] .codeblock pre,
:root[data-theme="dark"] pre code {
  color: var(--code-ink) !important;
  background: transparent !important;
}

/* Syntax Highlighting */
:root[data-theme="dark"] .kw { color: var(--rust) !important; }
:root[data-theme="dark"] .fn { color: #79c0ff !important; }
:root[data-theme="dark"] .str { color: #7ee787 !important; }
:root[data-theme="dark"] .cm { color: var(--code-faint) !important; font-style: italic; }
:root[data-theme="dark"] .num2 { color: #f2cc60 !important; }
:root[data-theme="dark"] .ty { color: #79c0ff !important; }
:root[data-theme="dark"] .pp { color: #d2a8ff !important; }
:root[data-theme="dark"] .code-run-wrap {
  background: var(--code-bar) !important;
  border-top-color: var(--line) !important;
}
:root[data-theme="dark"] .code-output-panel {
  background: var(--code-bg) !important;
  border-top-color: var(--line) !important;
  color: #7ee787 !important;
}

/* Figures & SVG Diagrams */
:root[data-theme="dark"] .fig-frame,
:root[data-theme="dark"] .viz {
  background: var(--paper-2) !important;
  border-color: var(--line) !important;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6) !important;
}
:root[data-theme="dark"] figcaption {
  color: var(--code-faint) !important;
}
:root[data-theme="dark"] figcaption b {
  color: var(--rust) !important;
}
:root[data-theme="dark"] .viz-title {
  color: var(--ink) !important;
}
:root[data-theme="dark"] .viz-note {
  color: var(--ink-soft) !important;
  border-top-color: var(--line) !important;
}

/* SVG Shapes inside all Figures & Diagrams */
:root[data-theme="dark"] .fig-frame svg rect[fill="#fff"],
:root[data-theme="dark"] .fig-frame svg rect[fill="#ffffff"],
:root[data-theme="dark"] .viz svg rect[fill="#ece3d4"],
:root[data-theme="dark"] .viz svg rect[fill="#e6ddcc"],
:root[data-theme="dark"] .viz svg rect[fill="#ddd3c0"],
:root[data-theme="dark"] .viz svg rect[fill="#f6f0e6"],
:root[data-theme="dark"] .viz svg rect[fill="#f3ede2"],
:root[data-theme="dark"] svg rect[fill="#fff"],
:root[data-theme="dark"] svg rect[fill="#ffffff"],
:root[data-theme="dark"] svg rect[fill="#ece3d4"],
:root[data-theme="dark"] svg rect[fill="#e6ddcc"],
:root[data-theme="dark"] svg rect[fill="#ddd3c0"],
:root[data-theme="dark"] svg rect[fill="#f6f0e6"],
:root[data-theme="dark"] svg rect[fill="#f3ede2"] {
  fill: var(--paper-3) !important;
  stroke: var(--line-strong) !important;
}

:root[data-theme="dark"] .fig-frame svg rect[fill="#f7d9d1"],
:root[data-theme="dark"] svg rect[fill="#f7d9d1"] {
  fill: #2d1816 !important;
  stroke: var(--rust) !important;
}

:root[data-theme="dark"] .fig-frame svg rect[fill="#e0e9dd"],
:root[data-theme="dark"] svg rect[fill="#e0e9dd"] {
  fill: #142a1b !important;
  stroke: var(--green) !important;
}

:root[data-theme="dark"] svg ellipse[fill="#f3ede2"],
:root[data-theme="dark"] svg ellipse {
  fill: var(--paper-3) !important;
  stroke: var(--line-strong) !important;
}

/* SVG Text elements */
:root[data-theme="dark"] svg text[fill="#211e1a"],
:root[data-theme="dark"] svg text[fill="#1a1a1a"] {
  fill: var(--ink) !important;
}
:root[data-theme="dark"] svg text[fill="#8d8475"],
:root[data-theme="dark"] svg text[fill="#9a8f78"],
:root[data-theme="dark"] svg text[fill="#5b5347"],
:root[data-theme="dark"] svg text[fill="#7d756a"] {
  fill: var(--ink-soft) !important;
}
:root[data-theme="dark"] svg text[fill="#8f2f20"],
:root[data-theme="dark"] svg text[fill="#b8402e"] {
  fill: var(--rust) !important;
}
:root[data-theme="dark"] svg text[fill="#7a4135"],
:root[data-theme="dark"] svg text[fill="#a06054"] {
  fill: #e3b341 !important;
}
:root[data-theme="dark"] svg text[fill="#3f6f4e"] {
  fill: var(--green) !important;
}

/* SVG Arrows and Lines */
:root[data-theme="dark"] svg line[stroke="#b8402e"],
:root[data-theme="dark"] svg path[stroke="#8f2f20"],
:root[data-theme="dark"] svg path[stroke="#b8402e"] {
  stroke: var(--rust) !important;
}
:root[data-theme="dark"] svg marker path[fill="#b8402e"],
:root[data-theme="dark"] svg marker path[fill="#8f2f20"] {
  fill: var(--rust) !important;
}
:root[data-theme="dark"] svg line[stroke="#d8cfbe"],
:root[data-theme="dark"] svg path[stroke="#d8cfbe"],
:root[data-theme="dark"] svg path[stroke="#c7bca6"] {
  stroke: var(--line-strong) !important;
}

/* Chapter Demos, Notes, Callouts & Tables */
:root[data-theme="dark"] .demo {
  background: var(--paper-2) !important;
  border-color: var(--line) !important;
}
:root[data-theme="dark"] .demo .dhead {
  background: var(--code-bar) !important;
  border-bottom-color: var(--line) !important;
  color: var(--ink) !important;
}
:root[data-theme="dark"] .req pre,
:root[data-theme="dark"] .res pre {
  background: var(--code-bg) !important;
  border-color: var(--line) !important;
  color: var(--code-ink) !important;
}
:root[data-theme="dark"] .req .lbl,
:root[data-theme="dark"] .res .lbl {
  color: var(--code-faint) !important;
}
:root[data-theme="dark"] .status.s400 {
  background: #3b1816 !important;
  color: var(--rust) !important;
}
:root[data-theme="dark"] .status.s200 {
  background: #142a1b !important;
  color: var(--green) !important;
}
:root[data-theme="dark"] .status.s500 {
  background: var(--line) !important;
  color: var(--ink) !important;
}
:root[data-theme="dark"] .defs {
  border-color: var(--line) !important;
}
:root[data-theme="dark"] .defs .row {
  border-bottom-color: var(--line) !important;
}
:root[data-theme="dark"] .defs .term {
  color: var(--ink) !important;
}
:root[data-theme="dark"] .defs .term small {
  color: var(--accent) !important;
}
:root[data-theme="dark"] .defs .desc {
  color: var(--ink-soft) !important;
}
:root[data-theme="dark"] .note {
  background: rgba(var(--rust-rgb), 0.08) !important;
  border-left-color: var(--rust) !important;
  color: var(--ink) !important;
}
:root[data-theme="dark"] .note .tag {
  color: var(--rust) !important;
}
:root[data-theme="dark"] .note.dark {
  background: var(--paper-2) !important;
  border-left-color: var(--accent) !important;
  color: var(--ink) !important;
}
:root[data-theme="dark"] .note.dark .tag {
  color: var(--accent) !important;
}
:root[data-theme="dark"] ol.steps li {
  border-bottom-color: var(--line) !important;
  color: var(--code-ink) !important;
}
:root[data-theme="dark"] ol.steps li::before {
  background: var(--code-bar) !important;
  border-color: var(--line-strong) !important;
  color: var(--accent) !important;
}
:root[data-theme="dark"] .pills .pill {
  background: var(--paper-2) !important;
  border-color: var(--line) !important;
  color: var(--ink-soft) !important;
}
:root[data-theme="dark"] .hero-rule,
:root[data-theme="dark"] .sec-divider {
  background: var(--line) !important;
}
:root[data-theme="dark"] .part-label::after {
  background: var(--line) !important;
}
:root[data-theme="dark"] .part-label {
  color: var(--accent) !important;
}
:root[data-theme="dark"] h4 {
  color: var(--rust) !important;
}
:root[data-theme="dark"] .sec-num {
  background: var(--accent) !important;
  color: var(--paper) !important;
  box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.4) !important;
}
:root[data-theme="dark"] .kicker {
  color: var(--accent) !important;
}
:root[data-theme="dark"] h1.title em {
  color: var(--accent) !important;
}
:root[data-theme="dark"] footer.end,
:root[data-theme="dark"] .bfp-footer {
  border-top-color: var(--line) !important;
  color: var(--ink-faint) !important;
}

/* ---------- Chapter Bottom Navigation Overrides across All Themes ---------- */
.chapter-nav {
  background: var(--paper-2) !important;
  border-top: 1.5px solid var(--line-strong) !important;
  box-shadow: 0 -8px 32px -16px rgba(0, 0, 0, 0.4) !important;
  color: var(--ink) !important;
}
.nav-chapter-link {
  color: var(--ink-soft) !important;
}
.nav-chapter-link:hover {
  background: rgba(var(--accent-rgb), 0.12) !important;
  color: var(--accent) !important;
}
.nav-arrow {
  color: var(--accent) !important;
}
.nav-indicator {
  background: var(--surface-card) !important;
  border-color: var(--line-strong) !important;
  color: var(--accent) !important;
}
.nav-indicator:hover {
  background: var(--accent) !important;
  color: #ffffff !important;
  border-color: var(--accent) !important;
}
.nav-dot {
  background: var(--accent) !important;
}
.nav-sep {
  color: var(--line-strong) !important;
}
.nav-small {
  color: var(--ink-faint) !important;
}

/* ---------- Inline code: one treatment in all 24 chapters ---------- */
code.ic, code.inl, code:not(pre code){
  font-family:var(--bfp-font-mono) !important;
  font-size:.84em !important;
  font-weight:500;
  background:var(--bfp-paper-3) !important;
  color:var(--bfp-accent-2) !important;
  border:1px solid var(--bfp-line) !important;
  border-radius:5px !important;
  padding:.1em .42em !important;
}

/* ---------- Text selection ---------- */
::selection{background:rgba(var(--accent-rgb),.25);color:var(--bfp-ink);}

/* ---------- Focus ring ---------- */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible{
  outline:2px solid var(--bfp-accent);
  outline-offset:2px;
  border-radius:4px;
}

/* ---------- Scrollbars inside code blocks ---------- */
pre::-webkit-scrollbar, .code-body::-webkit-scrollbar{height:9px;width:9px;}
pre::-webkit-scrollbar-track, .code-body::-webkit-scrollbar-track{background:transparent;}
pre::-webkit-scrollbar-thumb, .code-body::-webkit-scrollbar-thumb{
  background:#4a443b;border-radius:5px;border:2px solid transparent;background-clip:content-box;
}
pre::-webkit-scrollbar-thumb:hover, .code-body::-webkit-scrollbar-thumb:hover{background:#5e564a;background-clip:content-box;}

/* ---------- Print ---------- */
@media print{
  .chapter-nav, .kbd-nav-hint, .reading-progress-bar, .toc-toggle,
  .copy-code-button, .code-run-wrap, .search-overlay, .masterclass-dock-bar, .selection-bubble, .notes-sidebar-drawer, .notes-sidebar-backdrop, .note-creator-popover, .highlight-action-tooltip{display:none !important;}
  .toc, .sidebar, aside{display:none !important;}
  body{background:#fff;}
}

/* ---------- Language dot in code tab bars ----------
   Replaces the bullet glyph that used to sit in the markup. */
.lang-dot{
  display:inline-block;
  width:8px;height:8px;
  border-radius:50%;
  background:currentColor;
  margin-right:1px;
  vertical-align:baseline;
}

/* ---------- Arrow icon (replaces the arrow glyphs) ---------- */
.ico-arrow{display:inline-block;vertical-align:-2px;flex:none;}
.nav-arrow{display:inline-flex;align-items:center;color:var(--accent);}

/* ---------- Code inside a block never gets the inline treatment ---------- */
pre code, pre code.ic, pre code.inl {
  background: transparent !important;
  padding: 0 !important;
  border-radius: 0 !important;
  font-size: inherit !important;
  color: var(--code-ink) !important;
  border: 0 !important;
  font-weight: inherit !important;
}


/* ==========================================================================
   FLOATING MASTERCLASS DOCK (Positioned cleanly above lesson navigation)
   ========================================================================== */
.masterclass-dock-bar {
  position: fixed;
  bottom: 84px;
  right: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--paper-2);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 6px 8px;
  box-shadow: var(--shadow-elevated);
  z-index: 100005; /* Always on top of backdrops */
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.masterclass-dock-bar:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.35);
}

/* Homepage has no chapter navigation bar */
.bfp-homepage .masterclass-dock-bar,
body.is-homepage .masterclass-dock-bar {
  bottom: 24px !important;
}

/* When drawer is open, keep floating dock visible on the bottom-left */
body.drawer-open .masterclass-dock-bar {
  right: auto !important;
  left: 24px !important;
  bottom: 84px !important;
}

.bfp-homepage.drawer-open .masterclass-dock-bar,
body.is-homepage.drawer-open .masterclass-dock-bar {
  bottom: 24px !important;
  left: 24px !important;
  right: auto !important;
}

@media (max-width: 768px) {
  .masterclass-dock-bar {
    bottom: 74px !important;
    right: 14px !important;
  }
  body.drawer-open .masterclass-dock-bar {
    left: 14px !important;
    right: auto !important;
    bottom: 74px !important;
  }
}

.dock-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 13px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink);
  font-family: var(--bfp-font-mono);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
  user-select: none;
}
.dock-btn:hover {
  background: var(--surface-card-hover);
  color: var(--accent);
  border-color: var(--line-strong);
}
.dock-btn:active {
  transform: scale(0.97);
}

.dock-theme-btn {
  border: 1px solid var(--line);
  background: var(--surface-card);
}
.dock-theme-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface-card-hover);
}

/* Notes CTA Button & Badge Styling */
.dock-notebook-btn {
  background: rgba(var(--accent-rgb), 0.12) !important;
  color: var(--accent) !important;
  border: 1px solid rgba(var(--accent-rgb), 0.32) !important;
  font-weight: 700 !important;
}
.dock-notebook-btn:hover {
  background: var(--accent) !important;
  color: #ffffff !important;
  border-color: var(--accent) !important;
  box-shadow: 0 4px 14px rgba(var(--accent-rgb), 0.45) !important;
}

.dock-badge {
  background: var(--accent) !important;
  color: #ffffff !important;
  font-size: 11.5px !important;
  font-weight: 700 !important;
  border-radius: 6px !important;
  padding: 2px 7px !important;
  transition: all 0.15s ease !important;
}
.dock-notebook-btn:hover .dock-badge {
  background: #ffffff !important;
  color: var(--accent) !important;
}

.dock-top-btn {
  width: 32px;
  height: 32px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--ink-soft);
  text-decoration: none;
  border: 1px solid transparent;
}
.dock-top-btn:hover {
  color: var(--accent);
  background: var(--surface-card-hover);
  border-color: var(--accent);
}


/* Selection Bubble Tooltip */
.selection-bubble {
  position: fixed !important;
  z-index: 2147483647 !important;
  background: var(--code-bg, #232019) !important;
  border: 1px solid var(--line-strong, rgba(255,255,255,0.2)) !important;
  border-radius: 10px !important;
  padding: 7px 10px !important;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5) !important;
  display: none;
  align-items: center;
  gap: 8px;
  transform: translate(-50%, -100%);
  animation: bubblePop 0.16s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto !important;
}

@keyframes bubblePop {
  0% { opacity: 0; transform: translate(-50%, -85%) scale(0.95); }
  100% { opacity: 1; transform: translate(-50%, -100%) scale(1); }
}

.bubble-dot-btn {
  width: 18px;
  height: 18px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.25);
  cursor: pointer;
  padding: 0;
  transition: transform 0.15s ease;
}
.bubble-dot-btn:hover { transform: scale(1.25); }
.dot-rust { background: #b8402e !important; }
:root[data-theme="light"] .dot-rust { background: #0066cc !important; }
:root[data-theme="dark"] .dot-rust { background: #66b3ff !important; }
.dot-amber { background: #b07d2b !important; }
:root[data-theme="light"] .dot-amber { background: #ffb400 !important; }
:root[data-theme="dark"] .dot-amber { background: #ffc800 !important; }
.dot-emerald { background: #3f6f4e !important; }
:root[data-theme="light"] .dot-emerald { background: #00b464 !important; }
:root[data-theme="dark"] .dot-emerald { background: #64dc96 !important; }

.bubble-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.12) !important;
  border: 1px solid rgba(255, 255, 255, 0.18) !important;
  color: #f0ede8 !important;
  font-family: var(--bfp-font-mono, monospace) !important;
  font-size: 13.5px !important;
  font-weight: 600 !important;
  padding: 5px 11px !important;
  border-radius: 7px !important;
  cursor: pointer;
  transition: all 0.15s ease;
}
.bubble-btn:hover {
  background: rgba(255, 255, 255, 0.28) !important;
  color: #ffffff !important;
  border-color: rgba(255, 255, 255, 0.35) !important;
}

/* ==========================================================================
   HIGH-LEGIBILITY HIGHLIGHT MARKERS (Luminous Tint + Underline)
   ========================================================================== */
.user-highlight {
  border-radius: 3px;
  padding: 1px 3px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}
.user-highlight[data-color="rust"] {
  background: var(--hl-rust);
  border-bottom: 2px solid var(--accent);
  color: inherit;
}
.user-highlight[data-color="amber"] {
  background: var(--hl-amber);
  border-bottom: 2px solid var(--gold);
  color: inherit;
}
.user-highlight[data-color="emerald"] {
  background: var(--hl-emerald);
  border-bottom: 2px solid var(--green);
  color: inherit;
}
.user-highlight:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.35);
}

/* ==========================================================================
   FLOATING IN-DOM NOTE CREATOR POPOVER
   ========================================================================== */
.note-creator-popover {
  position: fixed !important;
  z-index: 2147483647 !important;
  background: var(--paper-2);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 16px 18px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.45);
  width: 340px;
  display: none;
  flex-direction: column;
  gap: 12px;
  transform: translate(-50%, -100%);
  animation: bubblePop 0.16s cubic-bezier(0.16, 1, 0.3, 1);
}
.note-popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--bfp-font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
}
.note-popover-quote {
  font-family: var(--bfp-font-mono);
  font-size: 13.5px;
  color: var(--ink-soft);
  background: var(--paper-3);
  padding: 7px 10px;
  border-radius: 7px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.note-popover-textarea {
  width: 100%;
  min-height: 76px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: var(--bfp-font-body);
  font-size: 15px;
  color: var(--ink);
  resize: vertical;
  outline: none;
  box-sizing: border-box;
}
.note-popover-textarea:focus {
  border-color: var(--accent);
}
.note-popover-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.note-color-picker {
  display: flex;
  align-items: center;
  gap: 7px;
}
.note-color-dot {
  width: 18px;
  height: 18px;
  border-radius: 6px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.15s;
}
.note-color-dot.active {
  border-color: var(--ink);
  transform: scale(1.15);
}

/* ==========================================================================
   FLOATING HIGHLIGHT ACTION TOOLTIP (Click on existing mark)
   ========================================================================== */
.highlight-action-tooltip {
  position: fixed !important;
  z-index: 2147483647 !important;
  background: var(--code-bg);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 7px 10px;
  box-shadow: 0 10px 28px rgba(0,0,0,0.4);
  display: none;
  align-items: center;
  gap: 8px;
  transform: translate(-50%, -100%);
  animation: bubblePop 0.15s ease;
}
.highlight-action-tooltip .tooltip-note {
  font-family: var(--bfp-font-body);
  font-size: 14px;
  color: #f0ede8;
  max-width: 170px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: 8px;
  border-right: 1px solid rgba(255,255,255,0.2);
}

/* ==========================================================================
   RIGHT-SIDE NOTES DRAWER (SIDEBAR)
   ========================================================================== */
.notes-sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 100000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.notes-sidebar-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.notes-sidebar-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 520px;
  max-width: 95vw;
  height: 100vh;
  background: var(--paper);
  border-left: 1px solid var(--line-strong);
  box-shadow: -10px 0 35px rgba(0, 0, 0, 0.35);
  z-index: 100001;
  display: flex;
  flex-direction: column;
  transform: translateX(105%);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}
.notes-sidebar-drawer.is-open {
  transform: translateX(0);
}
.notes-sidebar-drawer.is-resizing {
  transition: none !important;
}

.notes-sidebar-resizer {
  position: absolute;
  top: 0;
  left: -5px;
  width: 10px;
  height: 100%;
  cursor: ew-resize;
  z-index: 10;
  user-select: none;
  touch-action: none;
}
.notes-sidebar-resizer::after {
  content: '';
  position: absolute;
  top: 0;
  left: 4px;
  width: 2px;
  height: 100%;
  background: transparent;
  transition: background 0.15s ease;
}
.notes-sidebar-resizer:hover::after,
.notes-sidebar-drawer.is-resizing .notes-sidebar-resizer::after {
  background: var(--accent);
}

.notes-sidebar-header {
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--paper-2);
  flex: none;
}
.notes-sidebar-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.notes-sidebar-title {
  font-family: var(--bfp-font-display);
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
}

/* Save Status Indicator */
.notes-save-status {
  font-family: var(--bfp-font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-faint);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color 0.2s ease;
}
.notes-save-status.is-saving {
  color: var(--gold);
}
.notes-save-status.is-saved {
  color: var(--green);
}

/* Mode Switcher Tabs */
.notes-mode-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 3px;
  gap: 3px;
}
.notes-mode-btn {
  background: transparent;
  border: none;
  padding: 5px 10px;
  border-radius: 6px;
  font-family: var(--bfp-font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  line-height: 1.2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}
.notes-mode-btn svg {
  width: 14px;
  height: 14px;
  stroke-width: 2.2;
  flex-shrink: 0;
}
.notes-mode-btn:hover {
  color: var(--ink);
}
.notes-mode-btn.active {
  background: var(--paper-3);
  color: var(--accent);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.notes-mode-btn:focus-visible,
.obs-tool-btn:focus-visible,
.dock-btn:focus-visible,
.code-bookmark-btn:focus-visible,
.viz-bookmark-btn:focus-visible,
.notes-notepad-textarea:focus-visible,
.cb-popover-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.notes-sidebar-active-badge {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--bfp-font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
  border: 1px solid rgba(var(--accent-rgb), 0.22);
  padding: 5px 10px;
  border-radius: 7px;
}
.active-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 5px var(--accent);
  display: inline-block;
  flex: none;
}

/* Obsidian Toolbar */
.obsidian-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  background: var(--paper);
  padding: 5px 8px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  transition: opacity 0.2s ease;
}
.obsidian-toolbar.is-preview-mode {
  opacity: 0.45;
  pointer-events: none;
}
.obs-tool-btn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 5px;
  padding: 5px 9px;
  font-family: var(--bfp-font-mono);
  font-size: 13px;
  color: var(--ink-soft);
  cursor: pointer;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: all 0.15s ease;
  user-select: none;
}
.obs-tool-btn svg {
  width: 15px;
  height: 15px;
  stroke-width: 2;
  flex-shrink: 0;
}
.obs-tool-glyph {
  font-size: 13.5px;
  font-weight: 700;
  display: inline-block;
  line-height: 1;
}
.obs-tool-btn[data-tool="highlight"] .obs-tool-glyph {
  background: #ffe58f;
  color: #1a1813;
  padding: 0 4px;
  border-radius: 3px;
}
:root[data-theme="dark"] .obs-tool-btn[data-tool="highlight"] .obs-tool-glyph {
  background: #785a00;
  color: #fff3c4;
}
.obs-tool-divider {
  width: 1px;
  height: 17px;
  background: var(--line-strong);
  margin: 0 4px;
  flex-shrink: 0;
}
.obs-tool-btn:hover {
  background: var(--paper-2);
  color: var(--accent);
  border-color: var(--line-strong);
}
.obs-tool-btn-img {
  color: var(--accent);
  font-weight: 600;
}
.obs-save-btn {
  background: rgba(var(--accent-rgb), 0.08) !important;
  color: var(--accent) !important;
  border-color: rgba(var(--accent-rgb), 0.25) !important;
  font-weight: 600 !important;
}
.obs-save-btn:hover {
  background: var(--accent) !important;
  color: #ffffff !important;
}

/* FULL-HEIGHT NOTEPAD BODY */
.notes-notepad-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  background: var(--paper);
  transition: background 0.2s ease;
}
.notes-notepad-body.is-dragover {
  background: rgba(var(--accent-rgb), 0.08);
  box-shadow: inset 0 0 0 2px var(--accent);
}
.notes-notepad-textarea {
  flex: 1;
  width: 100%;
  height: 100%;
  border: none;
  outline: none;
  resize: none;
  padding: 18px 22px;
  font-family: var(--bfp-font-mono);
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink);
  background: transparent;
  box-sizing: border-box;
}
.notes-notepad-preview {
  flex: 1;
  width: 100%;
  height: 100%;
  overflow-y: auto;
  padding: 20px 24px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--bfp-font-body);
  color: var(--ink);
}

.notes-footer-stats {
  font-family: var(--bfp-font-mono);
  font-size: 13px;
  color: var(--ink-faint);
}

/* Obsidian Callouts */
.obsidian-callout {
  margin: 8px 0;
  padding: 10px 14px;
  border-radius: 8px;
  border-left: 4px solid var(--accent);
  background: rgba(var(--accent-rgb), 0.07);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.obsidian-callout.callout-note,
.obsidian-callout.callout-info,
.obsidian-callout.callout-todo {
  border-left-color: var(--blue);
  background: rgba(55, 96, 127, 0.08);
}
.obsidian-callout.callout-tip,
.obsidian-callout.callout-hint,
.obsidian-callout.callout-important,
.obsidian-callout.callout-success,
.obsidian-callout.callout-done {
  border-left-color: var(--green);
  background: rgba(63, 111, 78, 0.08);
}
.obsidian-callout.callout-warning,
.obsidian-callout.callout-caution,
.obsidian-callout.callout-attention {
  border-left-color: var(--gold);
  background: rgba(176, 125, 43, 0.09);
}
.obsidian-callout.callout-danger,
.obsidian-callout.callout-error,
.obsidian-callout.callout-failure,
.obsidian-callout.callout-bug {
  border-left-color: var(--accent);
  background: rgba(184, 64, 46, 0.09);
}
.obsidian-callout-title {
  display: flex;
  align-items: center;
  gap: 7px;
  font-weight: 700;
  font-size: 13.5px;
  font-family: var(--bfp-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.obsidian-callout-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  color: var(--ink);
}
.obsidian-callout-icon svg {
  width: 14px;
  height: 14px;
  stroke-width: 2.2;
  display: block;
}
.obsidian-callout-content {
  font-size: 12.5px;
  color: var(--ink);
  line-height: 1.5;
}

/* Obsidian Markdown Inline Styles */
.obsidian-highlight {
  background: #ffe58f;
  color: #1a1813;
  padding: 1px 4px;
  border-radius: 3px;
  font-weight: 500;
}
:root[data-theme="dark"] .obsidian-highlight {
  background: #785a00;
  color: #fff3c4;
}
.obsidian-strike {
  text-decoration: line-through;
  opacity: 0.7;
}
.obsidian-wikilink {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: rgba(88, 101, 242, 0.1);
  color: #4b52b5;
  padding: 1px 5px;
  border-radius: 4px;
  font-family: var(--bfp-font-mono);
  font-size: 11px;
  font-weight: 600;
  border: 1px solid rgba(88, 101, 242, 0.25);
}
:root[data-theme="dark"] .obsidian-wikilink {
  background: rgba(114, 137, 218, 0.16);
  color: #9cb4ff;
  border-color: rgba(114, 137, 218, 0.35);
}
.obsidian-tag {
  display: inline-block;
  background: rgba(var(--accent-rgb), 0.08);
  color: var(--accent);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: var(--bfp-font-mono);
  font-size: 11px;
  font-weight: 600;
  margin: 0 2px;
}
.md-heading {
  font-family: var(--bfp-font-display);
  color: var(--ink);
  margin: 4px 0 2px;
  line-height: 1.3;
}
.md-h1 { font-size: 16px; font-weight: 800; }
.md-h2 { font-size: 15px; font-weight: 700; }
.md-h3 { font-size: 14px; font-weight: 600; }
.md-h4 { font-size: 13px; font-weight: 600; }

/* Lists & Task items */
.md-task-item {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin: 2px 0;
}
.md-task-box {
  font-family: var(--bfp-font-mono);
  font-size: 13px;
  color: var(--accent);
  line-height: 1.4;
}
.md-task-item.is-checked .md-task-text {
  text-decoration: line-through;
  opacity: 0.65;
}
.md-bullet-item, .md-num-item {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin: 2px 0;
}
.md-bullet-dot, .md-num-label {
  font-family: var(--bfp-font-mono);
  color: var(--accent);
  font-weight: 700;
  font-size: 11.5px;
  line-height: 1.5;
}
.md-image-wrap {
  margin: 12px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
}
.md-image {
  max-width: 100%;
  max-height: 280px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  cursor: zoom-in;
  object-fit: contain;
  background: var(--paper-2);
  padding: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-sizing: border-box;
}
:root[data-theme="dark"] .md-image {
  background: #1e1d1a;
  border-color: #38342c;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}
:root[data-theme="light"] .md-image {
  background: #f8f9fa;
  border-color: #d0d7de;
}
.md-image:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}
.md-image-caption {
  font-family: var(--bfp-font-mono);
  font-size: 11px;
  color: var(--ink-soft);
  margin-top: 5px;
  text-align: center;
}
.md-diagram-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  background: rgba(63, 111, 78, 0.12);
  border: 1px solid rgba(63, 111, 78, 0.3);
  color: var(--green);
  font-family: var(--bfp-font-mono);
  font-size: 12px;
  margin: 6px 0;
}
.md-image-inline-wrap {
  display: inline-block;
  vertical-align: middle;
  margin: 0 4px;
}
.md-image-inline-wrap .md-image {
  max-height: 60px;
  border-radius: 4px;
}

/* Codeblocks & inline code in cards */
/* ==========================================================================
   OBSIDIAN SYNTAX HIGHLIGHTING & CODE CARDS
   ========================================================================== */
.md-codeblock-wrap {
  position: relative;
  margin: 10px 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--code-bg, #1a1714);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
:root[data-theme="dark"] .md-codeblock-wrap {
  background: #151412;
  border-color: #38342c;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}
:root[data-theme="light"] .md-codeblock-wrap {
  background: #f6f8fa;
  border-color: #d0d7de;
}

.md-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.18);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
:root[data-theme="light"] .md-code-header {
  background: #eaedf0;
  border-bottom-color: #d0d7de;
}

.md-code-left {
  display: flex;
  align-items: center;
  gap: 7px;
}

.md-code-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.md-code-lang-label {
  font-family: var(--bfp-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #c5beae;
  text-transform: uppercase;
}
:root[data-theme="light"] .md-code-lang-label {
  color: #4b5563;
}

.md-code-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 4px;
  color: #d4ccb8;
  font-family: var(--bfp-font-mono);
  font-size: 10.5px;
  padding: 2px 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}
:root[data-theme="light"] .md-code-copy-btn {
  background: #ffffff;
  border-color: #d0d7de;
  color: #24292f;
}
.md-code-copy-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}
:root[data-theme="light"] .md-code-copy-btn:hover {
  background: #f3f4f6;
}
.md-code-copy-btn.is-copied {
  background: rgba(63, 111, 78, 0.3);
  border-color: #3f6f4e;
  color: #7bc28c;
}

.md-codeblock {
  margin: 0 !important;
  padding: 12px 14px !important;
  background: transparent !important;
  font-family: var(--bfp-font-mono) !important;
  font-size: 12px !important;
  line-height: 1.6 !important;
  overflow-x: auto;
  white-space: pre !important;
}

/* Syntax Highlighting Token Colors */
.tok-kw {
  color: #e57463;
  font-weight: 600;
}
:root[data-theme="light"] .tok-kw {
  color: #cf222e;
}

.tok-type {
  color: #7fb0c9;
  font-weight: 600;
}
:root[data-theme="light"] .tok-type {
  color: #0550ae;
}

.tok-builtin {
  color: #d8b66a;
}
:root[data-theme="light"] .tok-builtin {
  color: #953800;
}

.tok-fn {
  color: #e0aa53;
}
:root[data-theme="light"] .tok-fn {
  color: #8250df;
}

.tok-str {
  color: #7bc28c;
}
:root[data-theme="light"] .tok-str {
  color: #116329;
}

.tok-num {
  color: #d184bf;
}
:root[data-theme="light"] .tok-num {
  color: #0550ae;
}

.tok-com {
  color: #8a8275;
  font-style: italic;
}
:root[data-theme="light"] .tok-com {
  color: #6e7781;
}

.tok-http-method {
  color: #e57463;
  font-weight: 700;
}
:root[data-theme="light"] .tok-http-method {
  color: #cf222e;
}

.tok-http-hdr {
  color: #7fb0c9;
  font-weight: 600;
}
:root[data-theme="light"] .tok-http-hdr {
  color: #116329;
}

/* Code Card Bookmark Dropdown Popover */
.code-bookmark-popover {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 290px;
  background: var(--paper-2, #211e1a);
  border: 1px solid var(--line-strong, #4a443a);
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  z-index: 100020;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: bfpPopoverIn 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}
:root[data-theme="light"] .code-bookmark-popover {
  background: #ffffff;
  border-color: #d0d7de;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.cb-popover-title {
  font-family: var(--bfp-font-mono);
  font-size: 12.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  padding: 2px 6px 6px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2px;
}

.cb-popover-btn {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: rgba(var(--accent-rgb), 0.05);
  border: 1px solid rgba(var(--accent-rgb), 0.15);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
  width: 100%;
  box-sizing: border-box;
}

.cb-popover-btn:hover {
  background: rgba(var(--accent-rgb), 0.16);
  border-color: var(--accent);
}

.cb-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}
.cb-icon svg {
  width: 17px;
  height: 17px;
  stroke-width: 2;
}

.cb-btn-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.cb-btn-body b {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--ink);
}

.cb-btn-body small {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.2;
}

.cb-popover-btn.remove-btn {
  background: rgba(184, 64, 46, 0.08);
  border-color: rgba(184, 64, 46, 0.25);
  color: #b8402e;
}

.cb-popover-btn.remove-btn:hover {
  background: rgba(184, 64, 46, 0.2);
  border-color: #b8402e;
}
.cb-popover-btn.remove-btn b {
  color: #b8402e;
}

.code-bookmark-btn.has-dropdown::after {
  content: ' ▾';
  font-size: 11px;
  margin-left: 2px;
}
.md-inline-code {
  font-family: var(--bfp-font-mono);
  font-size: 11.5px;
  background: var(--paper-3);
  border: 1px solid var(--line);
  padding: 1px 4px;
  border-radius: 3px;
  color: var(--accent);
}
.md-quote {
  border-left: 3px solid var(--accent);
  padding: 4px 10px;
  margin: 4px 0;
  color: var(--ink-soft);
  font-style: italic;
  background: rgba(var(--accent-rgb), 0.04);
  border-radius: 0 4px 4px 0;
}
.md-divider {
  border: none;
  border-top: 1px dashed var(--line-strong);
  margin: 8px 0;
}
.md-spacer {
  height: 6px;
}
.md-para {
  margin: 2px 0;
}
.md-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Fullscreen Image Preview Lightbox Modal */
.image-preview-modal {
  position: fixed;
  inset: 0;
  z-index: 1000000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.image-preview-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}
.image-preview-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.image-preview-box {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}
.image-preview-box img {
  max-width: 100%;
  max-height: 85vh;
  border-radius: 8px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.6);
}
.image-preview-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: #ffffff;
  font-size: 24px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}
.image-preview-close:hover {
  background: var(--accent);
}

.notebook-card-quote {
  font-family: var(--bfp-font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper-2);
  border: 1px solid var(--line);
  padding: 9px 12px;
  border-radius: 6px;
  white-space: normal;
  overflow-wrap: anywhere;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.notebook-card-quote:hover {
  background: var(--paper-3);
  border-color: var(--line-strong);
}
.notebook-card-quote.is-code {
  font-family: var(--bfp-font-mono);
  font-size: 11.5px;
  line-height: 1.5;
  white-space: pre-wrap;
  background: var(--code-bg);
  color: var(--code-ink);
  border-color: var(--line-strong);
}
.notebook-card-quote.is-code:hover {
  background: #1e1b15;
  border-color: var(--accent);
}
:root[data-theme="dark"] .notebook-card-quote.is-code {
  background: #0d0d0d;
  color: #e5e5e5;
  border-color: #262626;
}
.notebook-card-quote.is-clamped {
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.notebook-expand-pill {
  align-self: flex-start;
  background: var(--paper-3);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-family: var(--bfp-font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  cursor: pointer;
  margin-top: -2px;
  transition: all 0.15s ease;
  user-select: none;
}
.notebook-expand-pill:hover {
  background: var(--paper);
  color: var(--accent);
  border-color: var(--accent);
}
.notebook-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 10.5px;
  color: var(--ink-faint);
  font-family: var(--bfp-font-mono);
  margin-top: 2px;
  padding-top: 4px;
  border-top: 1px dashed var(--line);
}
.notebook-card-actions {
  display: flex;
  align-items: center;
  gap: 5px;
}
.notebook-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-family: var(--bfp-font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  user-select: none;
}
.notebook-action-btn:hover {
  background: var(--paper-3);
  color: var(--accent);
  border-color: var(--accent);
}
.notebook-jump-btn {
  background: rgba(var(--accent-rgb), 0.08);
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.25);
}
.notebook-jump-btn:hover {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}
.notebook-card-note-label {
  font-family: var(--bfp-font-mono);
  font-size: 9.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  display: block;
  margin-bottom: 2px;
}
.note-delete-btn {
  color: #ff6b57 !important;
  font-size: 10.5px !important;
  padding: 2px 7px !important;
  border-radius: 4px !important;
  flex: none;
}
.note-delete-btn:hover {
  background: rgba(255, 107, 87, 0.12) !important;
}

@keyframes highlightGlow {
  0% { transform: scale(1); box-shadow: 0 0 0 0 var(--accent); }
  30% { transform: scale(1.03); box-shadow: 0 0 0 6px var(--accent); filter: brightness(1.25); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 transparent; }
}
.user-highlight.highlight-pulse {
  animation: highlightGlow 1.2s ease-out;
  border-radius: 4px;
}

.notes-sidebar-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--paper-2);
  gap: 10px;
}

@media(max-width:600px){
  .masterclass-dock-bar { bottom: 12px; right: 12px; padding: 4px 6px; border-radius: 8px; }
  .dock-btn { font-size: 10.5px; padding: 5px 8px; border-radius: 5px; }
  .notes-sidebar-drawer { width: 100vw; }
}


/* ---------- Code Wrapping & Multi-Theme Codecard Styles ---------- */
.codecard pre,
.codeblock pre,
.code-body pre,
pre.code-body,
pre code,
.codecard pre code,
.codeblock pre code {
  white-space: pre-wrap !important;
  overflow-wrap: anywhere !important;
  tab-size: 2 !important;
}

/* Light Theme Code Cards & Highlighting */
:root[data-theme="light"] .codecard,
:root[data-theme="light"] .codeblock,
:root[data-theme="light"] .codeduo .codecard {
  background: #f6f8fa !important;
  border-color: #d0d7de !important;
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, 0.08) !important;
}
:root[data-theme="light"] .codebar,
:root[data-theme="light"] .code-bar {
  background: #eef1f4 !important;
  border-bottom: 1px solid #d0d7de !important;
}
:root[data-theme="light"] .codebar .fname,
:root[data-theme="light"] .code-bar .fname {
  color: #57606a !important;
}
:root[data-theme="light"] .codebar .dot {
  background: #afb8c1 !important;
}
:root[data-theme="light"] .langtag,
:root[data-theme="light"] .langtag.go,
:root[data-theme="light"] .langtag.py,
:root[data-theme="light"] .langtag.sql {
  background: #ffffff !important;
  border: 1px solid #d0d7de !important;
}
:root[data-theme="light"] .langtag.go { color: #0550ae !important; }
:root[data-theme="light"] .langtag.py { color: #8250df !important; }
:root[data-theme="light"] .langtag.sql { color: #953800 !important; }

:root[data-theme="light"] .codecard pre,
:root[data-theme="light"] .codeblock pre,
:root[data-theme="light"] pre code {
  color: #24292f !important;
  background: transparent !important;
}

/* Syntax Highlighting for Light Theme */
:root[data-theme="light"] .kw { color: #cf222e !important; }
:root[data-theme="light"] .fn { color: #0550ae !important; }
:root[data-theme="light"] .str { color: #116329 !important; }
:root[data-theme="light"] .cm { color: #6e7781 !important; font-style: italic; }
:root[data-theme="light"] .num2 { color: #953800 !important; }
:root[data-theme="light"] .ty { color: #0550ae !important; }
:root[data-theme="light"] .pp { color: #8250df !important; }
:root[data-theme="light"] .code-run-wrap {
  background: #eef1f4 !important;
  border-top-color: #d0d7de !important;
}
:root[data-theme="light"] .code-output-panel {
  background: #f6f8fa !important;
  border-top-color: #d0d7de !important;
  color: #116329 !important;
}

/* Save Buttons on Codebars & Diagrams */
.codebar-action-btn {
  font-family: var(--bfp-font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink-soft);
  border: 1px solid var(--line);
  cursor: pointer;
  margin-left: 8px;
  transition: all 0.15s ease;
  user-select: none;
}
.codebar-action-btn:hover {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}
.diagram-save-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: var(--bfp-font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--paper-2);
  color: var(--ink-soft);
  border: 1px solid var(--line);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  opacity: 0;
  transform: translateY(-2px);
  transition: all 0.15s ease;
  z-index: 10;
  user-select: none;
}
figure:hover .diagram-save-btn,
.viz:hover .diagram-save-btn {
  opacity: 1;
  transform: translateY(0);
}
.diagram-save-btn:hover {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}


/* ==========================================================================
   SAVE BOOKMARK BUTTONS
   ========================================================================== */

/* Code Bookmark Button */
.code-bookmark-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 9px;
  font-family: var(--bfp-font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  margin-left: 6px;
}
.code-bookmark-btn:hover {
  background: var(--paper-3);
  color: var(--accent);
  border-color: var(--accent);
}

/* Diagram Bookmark Button */
.viz-bookmark-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 5px 10px;
  font-family: var(--bfp-font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  margin-left: auto;
}
.viz-bookmark-btn:hover {
  background: var(--paper-3);
  color: var(--accent);
  border-color: var(--accent);
}
.fig-frame-wrap {
  position: relative;
}
.fig-bookmark-bar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}


/* Bookmark Saved Active State */
.code-bookmark-btn.is-saved,
.viz-bookmark-btn.is-saved {
  background: rgba(var(--accent-rgb), 0.15) !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  font-weight: 700 !important;
}

/* Enhanced Highlight Pulse for Cards, SVGs and Marks */
.highlight-pulse {
  animation: masterclassGlowPulse 1.8s cubic-bezier(0.16, 1, 0.3, 1) !important;
  scroll-margin: 90px;
}
.codecard.highlight-pulse,
.codeblock.highlight-pulse,
.viz.highlight-pulse,
figure.highlight-pulse {
  position: relative !important;
  z-index: 10 !important;
}
@keyframes masterclassGlowPulse {
  0% {
    outline: 3px solid var(--accent);
    outline-offset: 4px;
    box-shadow: 0 0 32px rgba(var(--accent-rgb), 0.85);
    transform: scale(1.015);
  }
  40% {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    box-shadow: 0 0 20px rgba(var(--accent-rgb), 0.5);
  }
  100% {
    outline: 1px solid transparent;
    outline-offset: 0;
    box-shadow: none;
    transform: scale(1);
  }
}


/* ==========================================================================
   THEME-SYNCHRONIZED HOVER SYSTEM
   ========================================================================== */

/* Universal Link Hovers */
a:hover {
  color: var(--accent-hover) !important;
}

/* Dock Button Hovers */
.dock-btn:hover {
  background: var(--surface-card-hover) !important;
  color: var(--accent) !important;
  border-color: var(--line-strong) !important;
}
.dock-theme-btn:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  background: var(--surface-card-hover) !important;
}
.dock-notebook-btn {
  background: rgba(var(--accent-rgb), 0.12) !important;
  color: var(--accent) !important;
  border: 1px solid rgba(var(--accent-rgb), 0.3) !important;
}
.dock-notebook-btn:hover {
  background: var(--accent) !important;
  color: #ffffff !important;
  border-color: var(--accent) !important;
  box-shadow: 0 4px 14px rgba(var(--accent-rgb), 0.4) !important;
}
.dock-top-btn:hover,
.dock-nav-btn:hover {
  color: var(--accent) !important;
  background: var(--surface-card-hover) !important;
  border-color: var(--accent) !important;
}

/* Bookmark & Save Action Hovers */
.code-bookmark-btn:hover,
.viz-bookmark-btn:hover,
.diagram-save-btn:hover,
.codebar-action-btn:hover {
  background: var(--accent) !important;
  color: #ffffff !important;
  border-color: var(--accent) !important;
  box-shadow: 0 2px 8px rgba(var(--accent-rgb), 0.35) !important;
}

/* Sidebar Note Card & Action Hovers */
.notebook-card:hover {
  border-color: var(--line-strong) !important;
  box-shadow: 0 6px 20px -8px rgba(var(--accent-rgb), 0.25) !important;
}
.notebook-action-btn:hover {
  background: var(--accent) !important;
  color: #ffffff !important;
  border-color: var(--accent) !important;
  box-shadow: 0 2px 8px rgba(var(--accent-rgb), 0.3) !important;
}
.notebook-expand-pill:hover {
  color: var(--accent) !important;
  border-color: var(--accent) !important;
  background: rgba(var(--accent-rgb), 0.08) !important;
}
.note-delete-btn:hover {
  background: #ff4d4f !important;
  color: #ffffff !important;
  border-color: #ff4d4f !important;
}

/* Cards & Navigation Hovers */
.chapter-card:hover {
  background: var(--surface-card-hover) !important;
  border-color: var(--accent) !important;
  box-shadow: 0 8px 24px -8px rgba(var(--accent-rgb), 0.3) !important;
}
.community-card:hover {
  background: var(--surface-card-hover) !important;
  border-color: var(--accent) !important;
}
.search-trigger:hover {
  background: var(--surface-card-hover) !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}
.search-result:hover,
.search-result.active {
  background: rgba(var(--accent-rgb), 0.12) !important;
  color: var(--ink) !important;
}
.nav-chapter-link:hover {
  background: rgba(var(--accent-rgb), 0.12) !important;
  color: var(--accent) !important;
}
.nav-indicator:hover {
  background: var(--accent) !important;
  color: #ffffff !important;
  border-color: var(--accent) !important;
}

/* Theme Options in Menu */
.theme-opt:hover {
  background: rgba(var(--accent-rgb), 0.1) !important;
  color: var(--accent) !important;
}
.theme-opt.on {
  background: var(--accent) !important;
  color: #ffffff !important;
}

/* Code Playground & Runner Hovers */
.code-run-btn:hover {
  background: var(--accent) !important;
  color: #ffffff !important;
  border-color: var(--accent) !important;
}
.code-playground-link:hover {
  background: rgba(var(--accent-rgb), 0.12) !important;
  color: var(--accent) !important;
  border-color: var(--accent) !important;
}
.code-tabs button:hover {
  color: var(--accent) !important;
  background: var(--surface-card-hover) !important;
}
.code-tabs button.on {
  border-bottom: 2px solid var(--accent) !important;
  color: var(--accent) !important;
}

/* Pills & Interactive Badges */
.pills .pill:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}

/* Sidebar Table of Contents Links */
.bfp-toc-link {
  color: var(--ink-soft) !important;
  transition: all 0.15s ease !important;
}
.bfp-toc-num {
  color: var(--accent) !important;
}
.bfp-toc-link:hover {
  color: var(--ink) !important;
  background: rgba(var(--accent-rgb), 0.08) !important;
  border-left-color: var(--accent) !important;
}
.bfp-toc-link.is-active {
  color: var(--accent) !important;
  background: rgba(var(--accent-rgb), 0.12) !important;
  border-left-color: var(--accent) !important;
  font-weight: 700 !important;
}
.bfp-toc-link.is-active .bfp-toc-num {
  color: var(--accent) !important;
}