:root {
  --ink: #1f2933;
  --muted: #667085;
  --line: #e7edf3;
  --soft: #f7fafc;
  --panel: #ffffff;
  --accent: #0f766e;
  --accent-2: #b45309;
  --accent-3: #334155;
  --shadow: 0 18px 45px rgba(31, 41, 51, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #ffffff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

.shell {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px 20px;
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  overflow-y: auto;
}

.brand {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.brand>div {
  display: grid;
  gap: 10px;
}

.hamburger-menu {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
}

.hamburger-menu .bar {
  width: 100%;
  height: 2px;
  background-color: var(--ink);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: left center;
}

.hamburger-menu.open .bar:nth-child(1) {
  transform: rotate(45deg) translate(1px, -2px);
}

.hamburger-menu.open .bar:nth-child(2) {
  opacity: 0;
}

.hamburger-menu.open .bar:nth-child(3) {
  transform: rotate(-45deg) translate(1px, 2px);
}

.brand-kicker,
.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand-title {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.2;
}

.nav {
  margin-top: 22px;
}

.nav-list,
.nav-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-list ul {
  padding-left: 14px;
  border-left: 1px solid var(--line);
  margin-left: 10px;
  margin-top: 4px;
  margin-bottom: 4px;
}

.nav-list li {
  margin-bottom: 4px;
}

.nav a {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
  line-height: 1.3;
}

.nav-list>li>a {
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--ink);
  padding: 8px 10px;
}

.nav a:hover,
.nav a:focus {
  color: var(--ink);
  background: var(--soft);
}

/* Scrollbar styling for sidebar */
.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 10px;
}

.sidebar:hover::-webkit-scrollbar-thumb {
  background: #cbd5e1;
}

body.dark-mode .sidebar:hover::-webkit-scrollbar-thumb {
  background: var(--accent); /* Beautiful neon teal scrollbar hover thumb in dark mode */
}

.content {
  min-width: 0;
}

.hero,
.section,
.footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 52px clamp(20px, 5vw, 68px);
}

.hero {
  display: grid;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  padding: 80px clamp(20px, 5vw, 68px) 60px;
  position: relative;
  overflow: hidden;
}

/* Subtle premium radial glow in the background of the hero */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 10% 20%, rgba(var(--accent-rgb, 15, 118, 110), 0.03) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero .eyebrow {
  background: rgba(var(--accent-rgb, 15, 118, 110), 0.08);
  border: 1px solid rgba(var(--accent-rgb, 15, 118, 110), 0.15);
  color: var(--accent);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  width: fit-content;
  text-transform: uppercase;
  margin-bottom: 4px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
}

.hero h1 {
  max-width: 950px;
  margin: 0;
  font-size: clamp(2.4rem, 5.5vw, 4.6rem); /* Beautiful balanced size */
  font-weight: 850;
  line-height: 1.06;
  letter-spacing: -0.035em; /* Premium modern tight tracking */
  background: linear-gradient(135deg, var(--ink) 45%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: var(--ink); /* Fallback */
}

/* Adjust gradient for dark mode hero title */
body.dark-mode .hero h1 {
  background: linear-gradient(135deg, #ffffff 40%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  max-width: 740px;
  margin: 0;
  color: var(--muted);
  font-size: 1.12rem;
  line-height: 1.68;
  font-weight: 450;
  letter-spacing: -0.01em;
}

.quick-grid,
.path-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.quick-card,
.path-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 18px;
}

.quick-card strong,
.path-card strong {
  display: block;
  margin-bottom: 6px;
}

.quick-card span,
.path-card span {
  color: var(--muted);
  font-size: 0.95rem;
}

.section-header {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.section-header h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.section-header p {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
}

.note-shell {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.source-note {
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 16px 18px;
  margin-bottom: 20px;
  background: #fbfdfd;
}

.source-note strong {
  color: var(--accent-3);
}

.note-content {
  max-width: 100%;
  color: #2f3742;
}

.note-content .indented {
  padding-left: clamp(10px, 2vw, 22px);
  border-left: 1px solid #eef2f6;
}

.note-content h1,
.note-content h2,
.note-content h3,
.note-content summary {
  letter-spacing: 0;
}

.note-content h1 {
  margin: 32px 0 14px;
  font-size: clamp(1.45rem, 2.6vw, 2.15rem);
  line-height: 1.15;
}

.note-content h2 {
  margin: 28px 0 12px;
  font-size: 1.45rem;
}

.note-content h3 {
  margin: 22px 0 8px;
  font-size: 1.12rem;
}

.note-content p,
.note-content ul,
.note-content ol {
  margin-top: 0.45rem;
  margin-bottom: 0.75rem;
}

.note-content li {
  margin-bottom: 0.4rem;
}

.note-content details {
  margin: 20px 0;
  border: 1px solid var(--line);
  border-left: 4px solid var(--line) !important;
  border-radius: 12px;
  background: var(--panel);
  box-shadow: 0 4px 12px rgba(31, 41, 51, 0.02);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

body.dark-mode .note-content details {
  background: var(--panel);
  border-color: var(--line);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.note-content details details {
  box-shadow: none;
  margin: 12px 0 12px 6px;
  border-left-width: 3px !important;
}

.note-content details[open] {
  box-shadow: 0 12px 28px rgba(31, 41, 51, 0.05);
  border-color: rgba(15, 118, 110, 0.25);
}

body.dark-mode .note-content details[open] {
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
  border-color: rgba(45, 212, 191, 0.2);
}

.note-content summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 16px 20px;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.4;
  list-style: none; /* Hide standard arrow in Chrome/Firefox */
  transition: background 0.2s ease, color 0.2s ease;
  border-bottom: 1px solid transparent;
}

.note-content summary::-webkit-details-marker {
  display: none; /* Hide standard arrow in Safari */
}

/* Custom interactive rotating chevron */
.note-content summary::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
  margin-left: 12px;
  flex-shrink: 0;
}

.note-content summary:hover {
  background: var(--soft);
  color: var(--accent);
}

.note-content summary:hover::after {
  border-color: var(--accent);
}

.note-content details[open] > summary {
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.note-content details[open] > summary::after {
  transform: rotate(-135deg) translateY(-2px) translateX(-2px);
  border-color: var(--accent);
}

.note-content details > .indented,
.note-content details > div {
  padding: 20px 24px;
}

.note-content mark {
  color: inherit !important;
  background: linear-gradient(180deg, transparent 58%, #fff0b3 58%);
}

.note-content code {
  border: 1px solid #e5e7eb;
  border-radius: 5px;
  padding: 0.08em 0.35em;
  color: #a43f00;
  background: #fff8ed;
  font-size: 0.9em;
}

.note-content figure {
  max-width: 100%;
  margin: 22px auto;
  text-align: center;
}

.note-content figure.image,
.note-content .callout {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 12px;
}

.note-content figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.note-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 4px;
}

.note-content .callout {
  display: flex;
  gap: 12px;
  text-align: left;
  background: #f8fafc;
}

.note-content .bookmark {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 24px;
  text-decoration: none;
  background: linear-gradient(135deg, #fbfdfd, #f2f8f8);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  margin: 28px 0;
  text-align: left;
  width: 100%;
}

body.dark-mode .note-content .bookmark {
  background: linear-gradient(135deg, #111b27, #080f19);
  border-color: var(--line);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Subtle gradient indicator on the left */
.note-content .bookmark::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2), var(--accent));
  background-size: 100% 200%;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Shimmer overlay effect */
.note-content .bookmark::after {
  content: '';
  position: absolute;
  top: 0;
  left: -150%;
  width: 150%;
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.25) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: skewX(-20deg);
  pointer-events: none;
}

body.dark-mode .note-content .bookmark::after {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.08) 50%,
    rgba(255, 255, 255, 0) 100%
  );
}

/* Hover animations */
.note-content .bookmark:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 16px 36px rgba(15, 118, 110, 0.08);
}

body.dark-mode .note-content .bookmark:hover {
  box-shadow: 0 16px 36px rgba(45, 212, 191, 0.15);
  border-color: var(--accent);
}

.note-content .bookmark:hover::before {
  width: 6px;
  animation: gradientFlow 2s linear infinite;
}

.note-content .bookmark:hover::after {
  animation: shimmer 1.5s cubic-bezier(0.16, 1, 0.3, 1) infinite;
}

.note-content .bookmark-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.note-content .bookmark-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 2px;
}

.note-content .bookmark-icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  flex-shrink: 0;
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

body.dark-mode .note-content .bookmark-icon-wrapper {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.note-content .bookmark:hover .bookmark-icon-wrapper {
  transform: scale(1.1) rotate(8deg);
}

.note-content .bookmark-icon {
  width: 14px;
  height: 14px;
  object-fit: contain;
  flex-shrink: 0;
}

.note-content .bookmark-domain {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.note-content .bookmark:hover .bookmark-domain {
  letter-spacing: 0.08em;
  color: var(--accent);
}

.note-content .bookmark-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.note-content .bookmark-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
  margin: 0;
  transition: color 0.3s ease;
}

.note-content .bookmark:hover .bookmark-title {
  color: var(--accent);
}

.note-content .bookmark-description {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.note-content .bookmark-action {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--soft);
  border: 1px solid var(--line);
  color: var(--muted);
  flex-shrink: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.note-content .bookmark:hover .bookmark-action {
  background: var(--accent);
  color: var(--panel);
  border-color: var(--accent);
  transform: translateX(6px) scale(1.05);
}

.note-content .bookmark-action .arrow-icon {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

@keyframes shimmer {
  0% {
    left: -150%;
  }
  50% {
    left: 150%;
  }
  100% {
    left: 150%;
  }
}

@keyframes gradientFlow {
  0% {
    background-position: 0% 0%;
  }
  100% {
    background-position: 0% 200%;
  }
}

@media (max-width: 640px) {
  .note-content .bookmark {
    padding: 16px;
    gap: 12px;
  }
  .note-content .bookmark-action {
    display: none;
  }
}

.equation-container,
.katex-display {
  overflow-x: auto;
}

.decoder-marker {
  margin: 28px 0 18px;
  border: 1px solid #dbeafe;
  border-left: 4px solid #2563eb;
  border-radius: 8px;
  background: #f8fbff;
  padding: 16px 18px;
}

.decoder-marker h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
}

.decoder-marker p {
  margin: 0;
  color: var(--muted);
}

.footer {
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ────────────────────────────────────────────────────────────────
   Desktop default: hide mobile-only elements
   The topbar is fully hidden on desktop.
   The drawer + backdrop are always rendered but off-screen/invisible
   (their CSS in the mobile block handles the hidden state via
   transform / opacity — NOT display:none — so JS transitions work).
   ──────────────────────────────────────────────────────────────── */
.mobile-topbar {
  display: none;
}

/* Drawer & backdrop: always block, but invisible on desktop */
.mobile-nav-drawer {
  display: none;
}

.mobile-nav-backdrop {
  display: none;
}

/* ================================================================
   MOBILE NAVIGATION — Fixed top-bar + Slide-in Drawer
   Only activates at ≤ 980 px. Desktop is completely unchanged.
   ================================================================ */
@media (max-width: 980px) {

  /* --- Layout: hide sidebar, push content to fill full width --- */
  .shell {
    display: block;
  }

  .sidebar {
    display: none;
    /* hidden; replaced by the mobile top-bar + drawer */
  }

  /* --- Fixed Mobile Top-Bar ------------------------------------ */
  .mobile-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 58px;
    padding: 0 18px;
    background: rgba(255, 255, 255, 0.82) !important;
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(20px) saturate(190%);
    -webkit-backdrop-filter: blur(20px) saturate(190%);
    z-index: 900;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    transition: background-color 0.3s ease, border-color 0.3s ease;
  }

  .mobile-topbar-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--ink);
    letter-spacing: -0.025em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: inline-block;
  }

  .mobile-topbar-title span {
    font-weight: 800;
    color: var(--accent);
    background: linear-gradient(135deg, var(--accent) 30%, rgba(var(--accent-rgb, 15, 118, 110), 0.85) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-right: 4px;
  }

  /* Hamburger button inside the top-bar */
  .mobile-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
  }

  .mobile-hamburger .bar {
    width: 100%;
    height: 2.5px;
    background-color: var(--ink);
    border-radius: 3px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform-origin: center;
  }

  .mobile-hamburger.open .bar:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
  }

  .mobile-hamburger.open .bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }

  .mobile-hamburger.open .bar:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
  }

  /* Offset the page content so it sits below the fixed bar */
  .content {
    padding-top: 58px;
  }

  /* --- Nav Drawer (slides in from RIGHT — where hamburger is) --- */
  .mobile-nav-drawer {
    display: flex;
    /* override the desktop display:none */
    position: fixed;
    top: 0;
    right: 0;
    /* anchored to the right edge */
    left: auto;
    width: min(300px, 85vw);
    height: 100vh;
    background: var(--bg-color, #ffffff);
    border-left: 1px solid var(--line);
    /* border on the left side now */
    box-shadow: -4px 0 32px rgba(0, 0, 0, 0.18);
    /* shadow goes leftward */
    z-index: 950;
    overflow-x: hidden;
    /* prevent any horizontal scroll */
    overflow-y: auto;
    flex-direction: column;
    /* Off-screen to the RIGHT — JS adds .open to slide it in */
    transform: translateX(110%);
    visibility: hidden;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
      visibility 0s linear 0.35s;
  }

  .mobile-nav-drawer.open {
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
      visibility 0s linear 0s;
  }

  /* Drawer header */
  .drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px 16px;
    border-bottom: 1px solid var(--line);
    flex-shrink: 0;
  }

  .drawer-header-text .drawer-kicker {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    display: block;
    margin-bottom: 3px;
  }

  .drawer-header-text .drawer-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
    margin: 0;
    line-height: 1.2;
  }

  .drawer-close {
    background: var(--soft);
    border: 1px solid var(--line);
    border-radius: 8px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    font-size: 1.1rem;
    color: var(--muted);
    transition: background 0.2s, color 0.2s;
  }

  .drawer-close:hover {
    background: var(--line);
    color: var(--ink);
  }

  /* Drawer nav content — force VERTICAL stacking, no horizontal scroll */
  .drawer-nav {
    flex: 1;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 8px 0 32px;
    width: 100%;
  }

  /* Reset ALL list items inside drawer to block — prevents inherited flex/inline layouts */
  .drawer-nav .nav-list,
  .drawer-nav .nav-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: block;
    /* force block, not flex or inline */
    width: 100%;
  }

  .drawer-nav .nav-list>li,
  .drawer-nav .nav-list ul>li {
    display: block !important;
    /* override any inherited inline-block */
    width: 100% !important;
    float: none;
  }

  .drawer-nav .nav-list>li>a {
    display: block;
    /* block so width is constrained */
    padding: 12px 20px 12px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ink);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
    white-space: normal;
    /* allow text to wrap */
    word-break: break-word;
    line-height: 1.4;
    box-sizing: border-box;
    max-width: 100%;
  }

  .drawer-nav .nav-list>li>a:hover,
  .drawer-nav .nav-list>li>a:focus {
    background: var(--soft);
    border-left-color: var(--accent);
    color: var(--accent);
  }

  .drawer-nav .nav-list ul {
    padding: 2px 0 6px 20px;
    border-left: none;
    margin: 0;
  }

  .drawer-nav .nav-list ul li a {
    display: block;
    padding: 7px 20px 7px 20px;
    font-size: 0.82rem;
    font-weight: 400;
    color: var(--muted);
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
    line-height: 1.4;
    white-space: normal;
    word-break: break-word;
    box-sizing: border-box;
    max-width: 100%;
  }

  .drawer-nav .nav-list ul li a:hover {
    background: var(--soft);
    color: var(--ink);
  }

  .drawer-nav .nav-list ul ul {
    padding-left: 14px;
  }

  .drawer-nav .nav-list ul ul li a {
    font-size: 0.78rem;
    padding: 5px 12px;
    color: var(--muted);
  }

  /* Active link in drawer */
  .drawer-nav .nav a.active {
    color: var(--accent);
    background: var(--soft);
    border-left-color: var(--accent);
    padding-left: 24px;
    font-weight: 700;
  }

  /* --- Backdrop overlay — always rendered on mobile, invisible until .visible --- */
  .mobile-nav-backdrop {
    display: block;
    /* override the desktop display:none */
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(2px);
    z-index: 940;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .mobile-nav-backdrop.visible {
    opacity: 1;
    pointer-events: all;
  }

  /* --- Grid / content adjustments for medium screens ----------- */
  .quick-grid,
  .path-grid {
    grid-template-columns: 1fr;
  }

  /* --- Hide the old sidebar hamburger button (unused on mobile) - */
  .hamburger-menu {
    display: none;
  }
}

/* Small phone refinements */
@media (max-width: 640px) {

  .hero,
  .section,
  .footer {
    padding: 34px 18px;
  }

  .note-content .indented {
    padding-left: 8px;
  }

  .note-content details>.indented,
  .note-content details>div {
    padding: 0 10px 12px;
  }
}

/* Animation styles */
.nav {
  position: relative;
}

.nav a {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.nav a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  border-radius: 4px;
}

.nav a.active {
  color: var(--accent);
  background: var(--soft);
  font-weight: 600;
  padding-left: 16px;
}

.nav a.active::before {
  transform: scaleY(1);
}

/* Fade in animation for sections */
.fade-in {
  /* opacity was 0 - removed */
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- New UI Enhancements --- */
:root {
  --h1-color: #1d4ed8;
  --h2-color: #b45309;
  --h3-color: #0f766e;
  --bg-color: #ffffff;
}

body.dark-mode {
  --ink: #f8fafc;
  --muted: #94a3b8;
  --line: #334155;
  --soft: #1e293b;
  --panel: #0f172a;
  --accent: #2dd4bf;
  --accent-2: #fb923c;
  --accent-3: #94a3b8;
  --h1-color: #60a5fa;
  --h2-color: #fb923c;
  --h3-color: #2dd4bf;
  --bg-color: #020617;
}

body {
  background-color: var(--bg-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.sidebar {
  background-color: var(--bg-color);
  transition: background-color 0.3s ease;
}

.note-content h1 {
  color: var(--h1-color);
}

.note-content h2 {
  color: var(--h2-color);
}

.note-content h3 {
  color: var(--h3-color);
}

.theme-toggle {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 14px;
  margin-top: 12px;
  color: var(--ink);
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
}

.theme-toggle:hover {
  background: var(--soft);
}

.nav-toggle {
  display: inline-block;
  margin-left: 8px;
  font-size: 0.8rem;
  transition: transform 0.3s ease;
  color: var(--accent);
}

.nav-toggle.open {
  transform: rotate(90deg);
}

.slide-down {
  animation: slideDown 0.3s ease-out forwards;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }

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

/* Dark mode overrides for specific elements */
.quick-card,
.path-card,
.source-note,
.note-content details,
.note-content figure.image,
.note-content .callout,
.bookmark,
.decoder-marker {
  background-color: var(--panel);
  color: var(--ink);
  border-color: var(--line);
}

body.dark-mode .note-content {
  color: var(--ink);
}

.note-content summary {
  color: var(--ink);
}

.note-content code {
  background-color: var(--soft);
  color: var(--accent-2);
  border-color: var(--line);
}

.note-content .indented {
  border-left-color: var(--line);
}

body.dark-mode .note-content mark {
  background: linear-gradient(180deg, transparent 58%, rgba(251, 146, 60, 0.3) 58%);
  color: var(--ink) !important;
}

/* ================================================================
   MONOKAI CODE THEME (Applied universally in Day and Night Modes)
   ================================================================ */
pre.code,
pre[class*="language-"],
code[class*="language-"] {
  background: #272822 !important;
  color: #f8f8f2 !important;
  border: 1px solid #3e3d32 !important;
  border-radius: 10px !important;
  text-shadow: none !important;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.4), 0 4px 20px rgba(0, 0, 0, 0.15) !important;
  font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace !important;
  font-size: 0.92rem !important;
  padding: 18px 22px !important;
  margin: 16px 0 !important;
}

/* Eradicate the dynamic Prism stylesheet's ugly operator background boxes */
pre.code .token,
pre[class*="language-"] .token {
  background: none !important;
  background-color: transparent !important;
}

/* Nested inner code adjustments */
pre.code code,
pre[class*="language-"] code {
  background: transparent !important;
  color: inherit !important;
  border: none !important;
  padding: 0 !important;
  box-shadow: none !important;
}

/* Syntax Highlighting - Classic Monokai Color Scheme */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: #75715e !important; /* Muted olive gray comment */
  font-style: italic !important;
}

.token.punctuation {
  color: #f8f8f2 !important; /* Soft off-white for colons, brackets, commas */
}

.token.namespace {
  opacity: .7;
}

.token.property,
.token.tag,
.token.constant,
.token.symbol,
.token.deleted {
  color: #f92672 !important; /* hot pink */
}

.token.boolean,
.token.number {
  color: #ae81ff !important; /* purple */
}

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
  color: #e6db74 !important; /* yellow */
}

.token.operator,
.token.entity,
.token.url {
  color: #f92672 !important; /* hot pink operators (e.g. =, *, +) */
}

.token.atrule,
.token.attr-value,
.token.keyword {
  color: #f92672 !important; /* hot pink keywords (e.g. class, def, import) */
  font-weight: bold !important;
}

.token.function,
.token.class-name {
  color: #a6e22e !important; /* lime green functions/methods and classes */
}

.token.regex,
.token.important,
.token.variable {
  color: #fd971f !important; /* orange variables/parameters */
}

.token.important,
.token.bold {
  font-weight: bold !important;
}

.token.italic {
  font-style: italic !important;
}

.token.entity {
  cursor: help;
}



/* --- Massive Organization Update: Pro Headings --- */

summary.pro-heading {
  cursor: pointer;
  margin: 24px 0 12px 0;
  transition: color 0.3s ease;
  display: block;
  list-style: none;
  /* removes default triangle in some browsers */
}

summary.pro-heading::-webkit-details-marker {
  display: none;
}

summary.pro-heading::before {
  content: '\276f';
  display: inline-block;
  vertical-align: middle;
  margin-right: 12px;
  font-size: 0.7em;
  transition: transform 0.2s ease;
  color: var(--muted);
}

details[open]>summary.pro-heading::before {
  transform: rotate(90deg);
}

summary.style-h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #ffffff !important;
  background: linear-gradient(90deg, #107b7b 0%, #1d5b9d 50%, #2947c6 100%);
  border-radius: 12px;
  padding: 18px 24px;
  margin-top: 36px;
  border: none;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.12);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
}

summary.style-h2:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 12px 24px rgba(29, 91, 157, 0.25);
}

summary.style-h2::before {
  color: rgba(255, 255, 255, 0.8) !important;
}

summary.style-h3 {
  font-size: 1.25rem !important;
  font-weight: 700;

  /* Elegant soft variables with defaults */
  background: var(--h3-bg, rgba(30, 41, 59, 0.04)) !important;
  border: 1px solid var(--h3-border, rgba(30, 41, 59, 0.12)) !important;
  border-left: 4px solid var(--h3-border-left, #475569) !important;
  color: var(--h3-text, #334155) !important;
  -webkit-text-fill-color: var(--h3-text, #334155) !important;

  border-radius: 8px;
  padding: 10px 16px !important;
  margin-top: 20px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
}

summary.style-h3:hover {
  transform: translateX(4px) scale(1.005);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

summary.style-h3::before {
  color: var(--h3-text, rgba(30, 41, 59, 0.6)) !important;
}

summary.style-h4 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--h1-color);
  padding: 8px 12px;
  border-radius: 6px;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

summary.style-h4:hover {
  background-color: var(--soft);
  transform: translateX(4px);
}

summary.style-h5 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
}

/* Remove the boxed appearance of details to make it look like a clean document */
.note-content details {
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
  margin: 0 !important;
  padding: 0 !important;
}

.note-content details>.indented,
.note-content details>div {
  padding: 0 0 0 24px !important;
  border-left: 2px solid var(--line) !important;
  margin-left: 8px !important;
  margin-bottom: 24px !important;
}

/* Ensure images inside don't have double backgrounds */
.note-content figure.image,
.note-content .callout {
  background: var(--panel);
  border: 1px solid var(--line);
}

/* --- Premium Resource Cards --- */
.resource-card-container {
  margin: 28px 0;
}

.resource-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  position: relative;
  overflow: hidden;
}

/* Accent borders on the left */
.resource-card::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 5px;
  height: 100%;
  transition: transform 0.3s ease;
  transform: scaleY(0.6);
}

.colab-card::after {
  background: #f59e0b;
  /* Colab orange */
}

.arxiv-card::after {
  background: #ef4444;
  /* Arxiv red */
}

/* Hover effects */
.resource-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border-color: var(--accent);
}

.resource-card:hover::after {
  transform: scaleY(1);
}

/* Icon styling */
.resource-icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 10px;
  background: var(--soft);
  padding: 10px;
  transition: transform 0.3s ease;
}

.resource-card:hover .resource-icon-wrapper {
  transform: scale(1.08);
}

.resource-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.resource-svg-icon {
  width: 28px;
  height: 28px;
  color: var(--ink);
}

/* Content details */
.resource-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.resource-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  width: fit-content;
  padding: 2px 8px;
  border-radius: 20px;
}

.tag-colab {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

.tag-arxiv {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.resource-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
}

.resource-desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.4;
}

/* Action button on the right */
.resource-action {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--soft);
  transition: all 0.3s ease;
}

.resource-card:hover .resource-action {
  background: var(--accent);
  color: #ffffff;
}

.resource-action .arrow {
  transition: transform 0.3s ease;
}

.resource-card:hover .resource-action .arrow {
  transform: translateX(3px);
}

/* Responsive */
@media (max-width: 640px) {
  .resource-card {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 16px;
  }

  .resource-icon-wrapper {
    width: 44px;
    height: 44px;
  }

  .resource-action {
    width: 100%;
    justify-content: center;
  }
}

/* ================================================================
 UPGRADE V3 — Paper summary, Reddit lines, Animations 
   ================================================================ */

/* Nav paper link highlight */
.nav-paper-link {
  font-weight: 700 !important;
  color: var(--accent) !important;
  letter-spacing: 0.01em;
}

/* Paper card accent colour */
.paper-card::after {
  background: #6366f1;
}

.tag-paper {
  background: rgba(99, 102, 241, 0.1);
  color: #6366f1;
}

/* Paper Summary Grid Container */
.paper-summary {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr));
  gap: 24px;
  margin-top: 36px;
}

/* Base card block styles */
.reddit-block {
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  position: relative;
  box-shadow: 0 4px 20px rgba(31, 41, 51, 0.03);
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  overflow: hidden;
  height: 100%;
  box-sizing: border-box;
  min-width: 0; /* Prevents flex children from stretching container */
}

/* Card Colors / Theme mapping */
.reddit-block:nth-child(1) { --card-theme: #6366f1; --card-theme-rgb: 99, 102, 241; }
.reddit-block:nth-child(2) { --card-theme: #0f766e; --card-theme-rgb: 15, 118, 110; }
.reddit-block:nth-child(3) { --card-theme: #d97706; --card-theme-rgb: 217, 119, 6; }
.reddit-block:nth-child(4) { --card-theme: #7c3aed; --card-theme-rgb: 124, 58, 237; }
.reddit-block:nth-child(5) { --card-theme: #0369a1; --card-theme-rgb: 3, 105, 161; }
.reddit-block:nth-child(6) { --card-theme: #dc2626; --card-theme-rgb: 220, 38, 38; }
.reddit-block:nth-child(7) { --card-theme: #059669; --card-theme-rgb: 5, 150, 105; }
.reddit-block:nth-child(8) { --card-theme: #db2777; --card-theme-rgb: 219, 39, 119; }

/* Interactive Hover floating and neon borders */
.reddit-block:hover {
  transform: translateY(-8px);
  border-color: var(--card-theme);
  box-shadow: 0 20px 40px rgba(var(--card-theme-rgb), 0.08), 
              0 6px 16px rgba(var(--card-theme-rgb), 0.03);
}

/* The decorative top strip */
.reddit-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--card-theme) !important;
  transition: height 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  border-radius: 16px 16px 0 0;
}

.reddit-block:hover .reddit-line {
  height: 6px;
}

/* Hide old dots */
.reddit-line::before {
  display: none !important;
}

.reddit-content {
  padding: 0;
  display: flex;
  flex-direction: column;
  height: 100%;
  margin-top: 4px;
  min-width: 0; /* Prevents flex children from stretching container */
}

.summary-heading {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 16px 0;
  color: var(--ink);
  letter-spacing: -0.025em;
  line-height: 1.35;
  display: flex;
  align-items: center;
  gap: 8px;
}

.reddit-content ul {
  list-style: none !important;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.reddit-content li {
  position: relative;
  padding-left: 18px; /* space for indicator dot */
  font-size: 0.94rem;
  line-height: 1.55;
  color: var(--muted);
  margin-bottom: 0 !important;
}

/* Modern square marker in card accent color */
.reddit-content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--card-theme);
  opacity: 0.75;
  transition: transform 0.2s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.2s ease;
}

.reddit-block:hover li::before {
  transform: scale(1.3);
  opacity: 1;
}

.reddit-content li strong {
  color: var(--ink);
  font-weight: 650;
}

/* Nested sub-lists styling inside cards */
.reddit-content ul ul {
  margin-top: 8px;
  padding-left: 6px;
  gap: 8px;
}

.reddit-content ul ul li {
  font-size: 0.88rem;
  padding-left: 14px;
}

.reddit-content ul ul li::before {
  top: 7px;
  width: 4px;
  height: 4px;
  border-radius: 50%; /* standard circle for sub-bullet */
  background: var(--card-theme);
  opacity: 0.6;
}

.reddit-content code {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 2px 7px;
  font-size: 0.88em;
  color: var(--accent-2);
}

/* Note-content Reddit lines for existing sections */
.note-content details>.indented,
.note-content details>div {
  padding: 0 0 0 24px !important;
  border-left: 2px solid var(--line) !important;
  margin-left: 4px !important;
  margin-bottom: 20px !important;
  transition: border-color 0.3s ease;
}

.note-content details[open]>.indented,
.note-content details[open]>div {
  border-left-color: var(--accent) !important;
}

/* Animations */
/* Staggered fade-in on load */
@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

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

/* Pulse animation for the paper card on load */
@keyframes gentlePulse {

  0%,
  100% {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
  }

  50% {
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.15);
  }
}

.paper-card {
  animation: gentlePulse 3.5s ease-in-out infinite;
}

.paper-card:hover {
  animation: none;
}

/* Hover shimmer effect on cards */
.resource-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.06), transparent);
  transition: left 0.5s ease;
  z-index: 1;
}

.resource-card:hover::before {
  left: 140%;
}

/* Summary block hover lift */
.summary-block {
  transition: transform 0.2s ease;
}

.summary-block:hover {
  transform: translateX(4px);
}

/* Active nav link pulse dot */
.nav a.active {
  position: relative;
}

.nav a.active::after {
  content: '';
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: navPulse 2s ease-in-out infinite;
}

@keyframes navPulse {

  0%,
  100% {
    opacity: 1;
    transform: translateY(-50%) scale(1);
  }

  50% {
    opacity: 0.4;
    transform: translateY(-50%) scale(0.6);
  }
}

/* details/summary open animation — scoped so it doesn't flash generic divs */
.note-content details[open]>.indented,
.note-content details[open]>div[dir] {
  animation: expandIn 0.28s ease-out;
}

@keyframes expandIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }

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

/* Section headers — subtle gradient underline */
.section-header h2 {
  color: var(--ink);
  /* Safe gradient accent via border instead */
  padding-bottom: 6px;
  border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--accent), var(--accent-2)) 1;
}

/* Path / quick cards hover lift */
.quick-card,
.path-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.quick-card:hover,
.path-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
}

/* Dark-mode gradient override (text fill won't work on dark) */
body.dark-mode .section-header h2 {
  color: var(--ink);
}


/* ================================================================
 UPGRADE V4 — Bug fixes + Tech Table + Expanded Reddit lines 
   ================================================================ */

/* FIX: ensure text inside details is always visible */
.note-content details>.indented *,
.note-content details>div * {
  color: var(--ink);
}

.note-content details>.indented p,
.note-content details>div p,
.note-content details>.indented li,
.note-content details>div li {
  color: var(--ink) !important;
  opacity: 1 !important;
  visibility: visible !important;
}

/* FIX: ensure pro-heading summaries never hide their text */
summary.pro-heading {
  color: var(--ink);
  -webkit-text-fill-color: var(--ink);
}

summary.style-h3,
summary.style-h3 * {
  color: var(--h3-text, #334155) !important;
  -webkit-text-fill-color: var(--h3-text, #334155) !important;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif !important;
}

summary.style-h3 code {
  background: var(--h3-code-bg, rgba(0, 0, 0, 0.04)) !important;
  border: 1px solid var(--h3-border, rgba(0, 0, 0, 0.1)) !important;
  color: var(--h3-text, #334155) !important;
  -webkit-text-fill-color: var(--h3-text, #334155) !important;
  padding: 0.1em 0.4em !important;
}

/* Dark mode default fallback for unmapped subheadings to ensure they are never dark gray */
body.dark-mode summary.style-h3,
body.dark-mode summary.style-h3 * {
  color: var(--h3-text, #cbd5e1) !important;
  -webkit-text-fill-color: var(--h3-text, #cbd5e1) !important;
}

body.dark-mode summary.style-h3 code {
  color: var(--h3-text, #cbd5e1) !important;
  -webkit-text-fill-color: var(--h3-text, #cbd5e1) !important;
}

summary.style-h4 {
  color: var(--h1-color) !important;
  -webkit-text-fill-color: var(--h1-color) !important;
}

/* Transformer Technical Table */
.tech-table-wrap {
  width: 100%;
  max-width: 100%;
  min-width: 0; /* allows shrinking inside flex containers */
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 32px 0;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background: var(--panel);
  min-width: 640px;
}

.tech-table thead tr {
  background: linear-gradient(90deg, #0f766e, #1d4ed8);
  color: #fff;
}

.tech-table thead th {
  padding: 14px 18px;
  text-align: left;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 0.88rem;
  text-transform: uppercase;
}

.tech-table tbody tr {
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}

.tech-table tbody tr:hover {
  background: var(--soft);
}

.tech-table tbody td {
  padding: 13px 18px;
  color: var(--ink);
  vertical-align: top;
  line-height: 1.5;
}

.tech-table tbody td:first-child {
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
}

.tech-table tbody td code {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.87em;
  color: var(--accent-2);
}

.tech-table tbody tr:last-child {
  border-bottom: none;
}

/* Expanded Reddit lines in note-content */
/* Every top-level details inside note-content gets a coloured left bar */
.note-content>div>div>details,
.note-content>div>details {
  border-left: 3px solid var(--line) !important;
  padding-left: 16px !important;
  margin-left: 0 !important;
  transition: border-color 0.3s ease;
}

/* Cycle through 8 accent colours using nth-of-type on the parent divs */
.note-content>div>div:nth-child(8n+1)>details {
  border-left-color: #6366f1 !important;
}

.note-content>div>div:nth-child(8n+2)>details {
  border-left-color: #0f766e !important;
}

.note-content>div>div:nth-child(8n+3)>details {
  border-left-color: #d97706 !important;
}

.note-content>div>div:nth-child(8n+4)>details {
  border-left-color: #7c3aed !important;
}

.note-content>div>div:nth-child(8n+5)>details {
  border-left-color: #0369a1 !important;
}

.note-content>div>div:nth-child(8n+6)>details {
  border-left-color: #dc2626 !important;
}

.note-content>div>div:nth-child(8n+7)>details {
  border-left-color: #059669 !important;
}

.note-content>div>div:nth-child(8n+8)>details {
  border-left-color: #db2777 !important;
}

/* Nested details get a subtler multi-line effect */
.note-content .indented>div>details {
  border-left: 2px solid var(--line) !important;
  padding-left: 14px !important;
}

.note-content .indented>div:nth-child(6n+1)>details {
  border-left-color: rgba(99, 102, 241, 0.5) !important;
}

.note-content .indented>div:nth-child(6n+2)>details {
  border-left-color: rgba(15, 118, 110, 0.5) !important;
}

.note-content .indented>div:nth-child(6n+3)>details {
  border-left-color: rgba(217, 119, 6, 0.5) !important;
}

.note-content .indented>div:nth-child(6n+4)>details {
  border-left-color: rgba(3, 105, 161, 0.5) !important;
}

.note-content .indented>div:nth-child(6n+5)>details {
  border-left-color: rgba(220, 38, 38, 0.5) !important;
}

.note-content .indented>div:nth-child(6n+6)>details {
  border-left-color: rgba(5, 150, 105, 0.5) !important;
}

/* Section dividers in the hero / main sections */
.section.fade-in {
  border-left: 4px solid transparent;
  padding-left: clamp(20px, 5vw, 68px);
  transition: border-color 0.5s ease;
}

#attention-paper {
  border-left-color: #6366f1;
}

#learning-path {
  border-left-color: #0f766e;
}

#part-1 {
  border-left-color: #d97706;
}

#part-2 {
  border-left-color: #7c3aed;
}

/* hr styling — make dividers look intentional */
.note-content hr {
  border: none;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  margin: 20px 0;
  border-radius: 2px;
}

/* ================================================================
 BUG FIX V5 — Replace broken opacity:0 fade-in with safe version 
   Content is always visible; animation is an enhancement only.
   ================================================================ */

/* Reset: sections are ALWAYS visible */
.fade-in {
  opacity: 1 !important;
  transform: none !important;
}

/* The "scroll-reveal" class is added by JS and slides the border in */
.scroll-reveal {
  position: relative;
}

.scroll-reveal::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 0%;
  border-radius: 4px;
  transition: height 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal.in-view::before {
  height: 100%;
}

/* Section left-border accent colours (always visible, no opacity trick) */
section#attention-paper {
  border-left: 4px solid #6366f1;
}

section#learning-path {
  border-left: 4px solid #0f766e;
}

section#part-1 {
  border-left: 4px solid #d97706;
}

section#part-2 {
  border-left: 4px solid #7c3aed;
}

/* Smooth slide-up effect using a separate .anim-ready class the JS adds */
.anim-ready {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.anim-ready.in-view {
  opacity: 1 !important;
  transform: none !important;
}

/* FINAL OVERRIDE: .fade-in must never hide content */
.fade-in,
.fade-in * {
  opacity: 1 !important;
  visibility: visible !important;
}

/* old theme switch removed */
.theme-switch input:checked+.slider .sun {
  opacity: 0.4;
}

.theme-switch input:checked+.slider .moon {
  opacity: 1;
}


/* ================================================================
   SECTION-SPECIFIC GRADIENT BANNERS & ACCENT BORDERS (01 - 08)
   ================================================================ */

/* General H2 Gradient Summary styling */
summary.style-h2,
summary.style-h2 * {
  font-size: 1.65rem !important;
  font-weight: 700 !important;
  color: #ffffff !important;
  -webkit-text-fill-color: #ffffff !important;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif !important;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.15) !important;
}

summary.style-h2 {
  border-bottom: none !important;
  padding: 18px 24px !important;
  margin-top: 36px !important;
  margin-bottom: 16px !important;
  border-radius: 12px !important;
  display: block !important;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08) !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  cursor: pointer !important;
  letter-spacing: 0.02em !important;
}

/* Hover effects */
summary.style-h2:hover {
  transform: translateY(-3px) scale(1.005);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18) !important;
}

/* White chevron/marker inside the gradient banner */
summary.style-h2::before {
  color: rgba(255, 255, 255, 0.9) !important;
  font-size: 1.1rem !important;
  margin-right: 14px !important;
}

/* 01 - Introduction (Vibrant Royal Blue to Sapphire Dual-Color Gradient) */
#\30 1-introduction-to-transformer>summary.style-h2 {
  background: linear-gradient(135deg, #1e3c72 0%, #2563eb 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.25) !important;
}

#\30 1-introduction-to-transformer[open]>.indented {
  border-left: 3px solid #2563eb !important;
}

/* 02 - What is Self Attention (Vibrant Emerald to Mint Dual-Color Gradient) */
#\30 2-what-is-self-attention>summary.style-h2 {
  background: linear-gradient(135deg, #059669 0%, #10b981 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(5, 150, 105, 0.25) !important;
}

#\30 2-what-is-self-attention[open]>.indented {
  border-left: 3px solid #059669 !important;
}

/* 03 - Self Attention in Transformers (Vibrant Sci-Fi Cyan to Teal Dual-Color Gradient) */
#\30 3-self-attention-in-transformers>summary.style-h2 {
  background: linear-gradient(135deg, #0f766e 0%, #06b6d4 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(8, 145, 178, 0.25) !important;
}

#\30 3-self-attention-in-transformers[open]>.indented {
  border-left: 3px solid #0891b2 !important;
}

/* 04 - Scaled Dot Product Attention (Futuristic Deep Violet to Purple Dual-Color Gradient) */
#\30 4-scaled-dot-product-attention>summary.style-h2 {
  background: linear-gradient(135deg, #5b21b6 0%, #8b5cf6 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(109, 40, 217, 0.25) !important;
}

#\30 4-scaled-dot-product-attention[open]>.indented {
  border-left: 3px solid #7c3aed !important;
}

/* 05 - Self-Attention Geometric Intuition (Futuristic Sky Blue to Ocean Blue Dual-Color Gradient) */
#\30 5-self-attention-geometric-intuition>summary.style-h2 {
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(2, 132, 199, 0.25) !important;
}

#\30 5-self-attention-geometric-intuition[open]>.indented {
  border-left: 3px solid #0284c7 !important;
}

/* 06 - Multi-head Attention (Electric Pink to Deep Magenta Dual-Color Gradient) */
#\30 6-multi-head-attention-in-transformers>summary.style-h2 {
  background: linear-gradient(135deg, #db2777 0%, #ec4899 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(219, 39, 119, 0.25) !important;
}

#\30 6-multi-head-attention-in-transformers[open]>.indented {
  border-left: 3px solid #db2777 !important;
}

/* 07 - Positional Encoding (Vibrant Cyber Orange to Amber Dual-Color Gradient) */
#\30 7-positional-encoding-in-transformers>summary.style-h2 {
  background: linear-gradient(135deg, #ea580c 0%, #f97316 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(234, 88, 12, 0.25) !important;
}

#\30 7-positional-encoding-in-transformers[open]>.indented {
  border-left: 3px solid #ea580c !important;
}

/* 08 - Layer Normalization (Cyber Amethyst to Lavender Dual-Color Gradient) */
#\30 8-layer-normalization-in-transformers>summary.style-h2 {
  background: linear-gradient(135deg, #7e22ce 0%, #a855f7 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(126, 34, 206, 0.25) !important;
}

#\30 8-layer-normalization-in-transformers[open]>.indented {
  border-left: 3px solid #8b5cf6 !important;
}

/* Encoder (Deep Royal Indigo to Cool Blue Dual-Color Gradient) */
#encoder>summary.style-h2 {
  background: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.25) !important;
}

#encoder[open]>.indented {
  border-left: 3px solid #6366f1 !important;
}

/* Decoder (Cyber Crimson Rose to Passionate Pink Dual-Color Gradient) */
#decoder>summary.style-h2 {
  background: linear-gradient(135deg, #e11d48 0%, #f43f5e 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  box-shadow: 0 4px 15px rgba(225, 29, 72, 0.25) !important;
}

#decoder[open]>.indented {
  border-left: 3px solid #f43f5e !important;
}

/* Questions (Pantone Turbulence to Slate-Blue) */
#questions-2>summary.style-h2 {
  background: linear-gradient(135deg, #4b4c53, #334155) !important;
}

#questions-2[open]>.indented {
  border-left: 3px solid #4b4c53 !important;
}

/* ================================================================
   ICON-ONLY FOOTER
   ================================================================ */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
  padding: 32px 24px;
  text-align: center;
  color: var(--muted);
}

.footer-inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  margin: 0;
}

.footer-tagline {
  font-size: 0.9rem;
  margin: 0;
}

.footer-icons {
  display: flex;
  gap: 16px;
  margin-top: 8px;
}

.footer-icon {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--soft);
  color: var(--muted);
  transition: all 0.3s ease;
}

.footer-icon:hover {
  background: var(--line);
  color: var(--ink);
  transform: translateY(-2px);
}

.icon-tooltip {
  position: absolute;
  bottom: -30px;
  font-size: 0.75rem;
  background: var(--ink);
  color: var(--panel);
  padding: 4px 8px;
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.footer-icon:hover .icon-tooltip {
  opacity: 1;
  visibility: visible;
  bottom: -35px;
}

/* ================================================================
   PROFESSIONAL THEME TOGGLE
   ================================================================ */
.pro-theme-wrapper {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
}

.cyber-toggle-checkbox {
  display: none;
}

.pro-theme-toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 64px;
  height: 32px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 32px;
  padding: 0 6px;
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.pro-theme-toggle:hover {
  border-color: var(--accent);
}

.icon-sun, .icon-moon {
  z-index: 1;
  color: var(--muted);
  transition: color 0.3s ease;
}

.icon-sun {
  color: #f59e0b; /* Amber */
}

body.dark-mode .icon-sun {
  color: var(--muted);
}

body.dark-mode .icon-moon {
  color: #60a5fa; /* Blue */
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 26px;
  height: 26px;
  background: #ffffff;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}

body.dark-mode .toggle-thumb {
  background: var(--accent); /* Vibrant neon teal toggle thumb in dark mode */
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.cyber-toggle-checkbox:checked + .pro-theme-toggle .toggle-thumb {
  transform: translateX(32px);
}

.cyber-toggle-checkbox:checked + .pro-theme-toggle {
  background: var(--soft);
}

.mobile-toggle {
  display: none;
}

@media (max-width: 980px) {
  .desktop-toggle {
    display: none !important;
  }
  .mobile-toggle {
    display: flex !important;
    position: static;
    margin: 0 auto;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .pro-theme-wrapper.desktop-toggle {
    top: 10px;
    right: 10px;
  }
}


/* --- Custom Glassmorphic/Bordered Colors for H3 Sub-headings --- */
/* Blue Theme Subheadings */
#self-attention-mechanismin-the-transformer-model>summary.style-h3,
#how-does-the-dimensionality-of-vectors-affect-self-attention>summary.style-h3,
#\34 -why-addition-instead-of-concatenation>summary.style-h3,
#what-is-normalization-and-why-is-it-useful-in-deep-learning>summary.style-h3,
#details-geo-embeddings>summary.style-h4,
#details-mha-dimensions>summary.style-h4,
#cross-attention-in-transformers>summary.style-h3,
#how-positional-encoding-is-use-in-the-paper-attention-is-all-you-need>summary.style-h3,
#encoder-transformer-overview>summary.style-h3 {
  --h3-bg: rgba(37, 99, 235, 0.05);
  --h3-border: rgba(37, 99, 235, 0.15);
  --h3-border-left: #2563eb;
  --h3-text: #1d4ed8;
  --h3-code-bg: rgba(37, 99, 235, 0.08);
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    align-items: center !important;
    line-height: 1.4 !important;
    box-sizing: border-box !important;
  }

  summary.style-h3 strong,
  summary.style-h3 b {
    font-size: inherit !important;
    font-weight: 700;
  }
}

/* --- Mobile (≤ 768px) --- */
@media (max-width: 768px) {

  /* Sidebar becomes a sticky top bar */
  .sidebar {
    position: sticky;
    top: 0;
    height: auto;
    z-index: 100;
    border-right: none;
    border-bottom: 2px solid var(--line);
    padding: 10px 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 8px;
    border-bottom: none;
    margin-bottom: 6px;
  }

  .brand-title {
    font-size: 1rem;
    margin: 0;
    white-space: nowrap;
  }

  .brand-kicker {
    display: none;
  }

  .theme-toggle {
    margin-top: 0;
    padding: 5px 12px;
    font-size: 0.82rem;
  }

  .nav-list {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 4px;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .nav-list>li {
    display: inline-block;
    width: auto;
    white-space: nowrap;
    margin-bottom: 0;
  }

  .nav-list ul {
    display: none;
  }

  .nav a {
    padding: 8px 12px;
    font-size: 0.82rem;
    border-radius: 20px;
  }

  /* Layout & spacing */
  .hero,
  .section,
  .footer {
    padding: 28px 16px;
  }

  .hero h1 {
    font-size: clamp(1.7rem, 7vw, 2.8rem);
    line-height: 1.1;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .quick-grid,
  .path-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .quick-card,
  .path-card {
    padding: 14px;
  }

  .section-header h2 {
    font-size: clamp(1.4rem, 5vw, 2rem);
  }

  /* Note content */
  .note-content h1 {
    font-size: clamp(1.25rem, 5vw, 1.7rem);
  }

  .note-content h2 {
    font-size: 1.2rem;
  }

  .note-content h3 {
    font-size: 1rem;
  }

  .note-content p,
  .note-content li {
    font-size: 0.93rem;
  }

  .note-content img {
    max-width: 100%;
    height: auto;
  }

  .note-content figure.image {
    padding: 8px;
    margin: 14px auto;
  }

  .note-content .indented {
    padding-left: 10px;
  }

  .note-content details>.indented,
  .note-content details>div {
    padding: 0 0 0 14px !important;
    margin-left: 4px !important;
  }

  /* Section toggles — uniform height on mobile */
  summary.style-h2 {
    font-size: 0.97rem !important;
    padding: 13px 16px !important;
    margin-top: 20px !important;
    border-radius: 10px !important;
    line-height: 1.35 !important;
    letter-spacing: 0.01em !important;
    min-height: 52px !important;
    display: flex !important;
    align-items: center !important;
  }

  summary.style-h2 strong,
  summary.style-h2 b {
    font-size: inherit !important;
    font-weight: 700;
  }

  /* style-h3 sub-section toggles — fixed height enforces strict uniformity */
  summary.style-h3 {
    font-size: 0.82rem !important;
    padding: 12px 16px !important;
    height: auto !important;
    min-height: 52px !important;
    display: flex !important;
    align-items: center !important;
    line-height: 1.4 !important;
    box-sizing: border-box !important;
  }

  summary.style-h3 strong,
  summary.style-h3 b {
    font-size: inherit !important;
    font-weight: 700;
  }

  summary.style-h2:hover,
  summary.style-h3:hover {
    transform: none;
  }

  summary.pro-heading::before {
    font-size: 0.65em;
    margin-right: 10px;
  }

  /* style-h4, style-h5, and technical summary toggles on mobile */
  summary.style-h4 {
    font-size: 0.9rem !important;
    padding: 6px 10px !important;
  }

  summary.style-h5 {
    font-size: 0.82rem !important;
  }

  summary.tech-summary {
    font-size: 0.9rem !important;
    padding: 12px 16px !important;
  }




  /* Resource cards */
  .resource-card {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
  }

  .resource-action {
    width: 100%;
    justify-content: center;
  }

  /* Move dark mode toggle to bottom-right (avoids nav overlap) */
  .cyber-toggle-wrapper {
    top: auto;
    bottom: 20px;
    right: 16px;
    animation: none;
  }

  /* Reddit blocks on mobile */
  .reddit-block {
    padding: 20px 16px;
  }

  /* Alerts & markers */
  .decoder-marker {
    padding: 12px 14px;
  }

  .alert-callout {
    padding: 10px 14px;
    font-size: 0.87rem;
  }

  /* Footer */
  .site-footer {
    padding: 24px 16px;
  }

  .footer-icons {
    gap: 12px;
  }

  /* Responsive card-based mobile tech table */
  .tech-table-wrap {
    margin: 16px 0;
    border-radius: 12px;
    box-shadow: none;
    background: transparent;
    overflow-x: visible;
  }
  .tech-table {
    display: block;
    width: 100% !important;
    min-width: 0 !important;
    background: transparent !important;
    border: none !important;
    font-size: 0.88rem;
  }
  .tech-table thead {
    display: none !important;
  }
  .tech-table tbody {
    display: block;
    width: 100%;
  }
  .tech-table tbody tr {
    display: block;
    width: 100%;
    margin-bottom: 20px;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 16px;
    background: var(--panel);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
    box-sizing: border-box;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }
  .tech-table tbody tr:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05);
  }
  .tech-table tbody tr:last-child {
    margin-bottom: 0;
  }
  .tech-table tbody td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0 !important;
    border: none !important;
    border-bottom: 1px solid var(--line) !important;
    width: 100% !important;
    box-sizing: border-box;
    background: transparent !important;
    text-align: right;
  }
  .tech-table tbody td:first-child {
    font-weight: 700;
    color: var(--accent) !important;
    white-space: normal;
  }
  .tech-table tbody td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--muted);
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-right: 16px;
    flex-shrink: 0;
    text-align: left;
  }
  .tech-table tbody td[data-label="What It Controls"],
  .tech-table tbody td[data-label="Mechanism"],
  .tech-table tbody td[data-label="Pros / Strengths"],
  .tech-table tbody td[data-label="Cons / Limitations"],
  .tech-table tbody td[data-label="Key Applications"],
  .tech-table tbody td.stack-mobile {
    flex-direction: column;
    align-items: stretch;
    border-bottom: none !important;
    text-align: left;
    padding-top: 12px !important;
    gap: 6px;
  }
  .tech-table tbody td[data-label="What It Controls"]::before,
  .tech-table tbody td[data-label="Mechanism"]::before,
  .tech-table tbody td[data-label="Pros / Strengths"]::before,
  .tech-table tbody td[data-label="Cons / Limitations"]::before,
  .tech-table tbody td[data-label="Key Applications"]::before,
  .tech-table tbody td.stack-mobile::before {
    margin-bottom: 2px;
  }
}

/* --- Small Mobile (≤ 480px) --- */
@media (max-width: 480px) {

  .hero,
  .section,
  .footer {
    padding: 20px 12px;
  }

  .hero h1 {
    font-size: clamp(1.5rem, 8vw, 2.2rem);
  }

  summary.style-h2 {
    font-size: 0.92rem !important;
    padding: 12px 14px !important;
    margin-top: 16px !important;
    min-height: 50px !important;
    display: flex !important;
    align-items: center !important;
  }

  summary.style-h2 strong,
  summary.style-h2 b {
    font-size: inherit !important;
    font-weight: 700;
  }

  summary.style-h3 {
    font-size: 0.8rem !important;
    padding: 10px 12px !important;
    height: auto !important;
    min-height: 48px !important;
    display: flex !important;
    align-items: center !important;
    line-height: 1.4 !important;
    box-sizing: border-box !important;
  }

  summary.style-h3 strong,
  summary.style-h3 b {
    font-size: inherit !important;
    font-weight: 700;
  }

  /* style-h4, style-h5, and technical summary toggles on small mobile */
  summary.style-h4 {
    font-size: 0.85rem !important;
    padding: 5px 8px !important;
  }

  summary.style-h5 {
    font-size: 0.78rem !important;
  }

  summary.tech-summary {
    font-size: 0.82rem !important;
    padding: 10px 12px !important;
  }

  .note-content p,
  .note-content li {
    font-size: 0.88rem;
    line-height: 1.6;
  }

  .note-content code {
    word-break: break-all;
  }

  .nav a {
    font-size: 0.78rem;
    padding: 7px 10px;
  }

  .brand-title {
    font-size: 0.92rem;
  }

  pre,
  .equation-container,
  .katex-display {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Smaller cyber toggle */
  .cyber-toggle-wrapper {
    bottom: 14px;
    right: 12px;
  }

  .cyber-toggle-track {
    width: 50px;
    height: 26px;
  }

  .cyber-toggle-track::before {
    width: 20px;
    height: 20px;
  }

  .cyber-toggle-checkbox:checked+.cyber-toggle .cyber-toggle-track::before {
    transform: translateX(24px);
  }

  .cyber-toggle-checkbox:checked+.cyber-toggle:hover .cyber-toggle-track::before {
    transform: translateX(24px) scale(1.08);
  }
}

/* Prevent horizontal scroll site-wide */
html,
body {
  overflow-x: hidden;
}



/* ================================================================
   INTERACTIVE COLLAPSIBLE SECTIONS
   ================================================================ */
.section-collapsible {
  position: relative;
}

.section-collapsible .section-header {
  position: relative;
  cursor: pointer;
  user-select: none;
  padding-right: 60px; /* Space for chevron button */
  border-radius: 8px;
  transition: background-color 0.2s ease;
}

/* Hover glow for collapsible section triggers */
.section-collapsible .section-header:hover h2 {
  color: var(--accent);
}

/* Custom modern circle toggle button */
.section-toggle-btn {
  position: absolute;
  right: 0;
  top: 40px;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--soft);
  border: 1px solid var(--line);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.section-collapsible .section-header:hover .section-toggle-btn {
  background: var(--panel);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 4px 12px rgba(15, 118, 110, 0.15);
}

.section-toggle-btn svg {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.section-collapsible.collapsed .section-toggle-btn svg {
  transform: rotate(-90deg);
}

.section-collapsible.collapsed .section-toggle-btn {
  background: var(--soft);
  border-color: var(--line);
  color: var(--muted);
  box-shadow: none;
}

/* Transition for main section articles */
.section-collapsible .note-shell {
  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), 
              opacity 0.4s ease, 
              padding-top 0.4s ease, 
              padding-bottom 0.4s ease, 
              margin-top 0.4s ease,
              transform 0.4s ease;
  max-height: 200000px; /* Safe upper limit for content */
  opacity: 1;
  transform: translateY(0);
  transform-origin: top;
  overflow: visible;
}

.section-collapsible.collapsed .note-shell {
  max-height: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  opacity: 0 !important;
  transform: translateY(-12px);
  pointer-events: none;
  overflow: hidden !important;
}

/* Elegant status badge for collapsed state */
.collapsed-indicator {
  display: none;
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 500;
  align-items: center;
  gap: 6px;
  animation: fadeIn 0.3s ease;
  background: var(--soft);
  padding: 6px 12px;
  border-radius: 20px;
  width: fit-content;
  border: 1px dashed var(--line);
}

.section-collapsible.collapsed .collapsed-indicator {
  display: inline-flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Adapt toggle button positioning for mobile viewports */
@media (max-width: 980px) {
  .section-collapsible .section-header {
    padding-right: 50px;
  }
  .section-toggle-btn {
    top: 36px;
    width: 34px;
    height: 34px;
  }
}

/* ================================================================
   GLOBAL SECTION MINIMIZER SWITCH
   ================================================================ */
.part-toggle-wrapper {
  display: flex;
  justify-content: flex-end;
  margin: 16px 0 32px;
  padding: 0 clamp(20px, 5vw, 68px);
}

.part-toggle-control {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 8px 16px;
  border-radius: 30px;
  box-shadow: 0 4px 12px rgba(31, 41, 51, 0.03);
  transition: all 0.3s ease;
}

.part-toggle-control:hover {
  border-color: rgba(var(--accent-rgb, 15, 118, 110), 0.2);
  box-shadow: 0 4px 15px rgba(31, 41, 51, 0.06);
}

.part-toggle-label {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  user-select: none;
}

/* The slider shell */
.part-toggle-btn {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--line);
  border-radius: 12px;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.part-toggle-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.part-toggle-circle {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: #ffffff;
  border-radius: 50%;
  box-shadow: 0 2px 5px rgba(0,0,0,0.15);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Active switch state styles */
.part-toggle-btn.active {
  background: var(--accent);
}

.part-toggle-btn.active .part-toggle-circle {
  transform: translateX(20px);
}

/* Dark mode variable overrides for accent rgb values if needed */
.dark-mode {
  --accent-rgb: 20, 184, 166; /* lighter/brighter teal for dark mode */
}

/* Translucent dark glass background override for mobile topbar in dark mode */
body.dark-mode .mobile-topbar {
  background: rgba(2, 6, 23, 0.82) !important;
}

/* ================================================================
   VOCABULARY & SELF-ATTENTION COMPARISON TABLE (SECTION 2 OPTIMIZATION)
   ================================================================ */
.vocab-table-wrap {
  margin: 32px 0;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(15, 118, 110, 0.08); /* Premium subtle theme-accented shadow */
  border: 1px solid var(--line);
  background: var(--panel);
  overflow-x: auto;
}

body.dark-mode .vocab-table-wrap {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.08);
}

.vocab-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.92rem;
  min-width: 1100px; /* Spacious, prevents squishing of the 7 columns on desktop */
}

/* Stunning gradient header specifically for this comparison table */
.vocab-table thead tr {
  background: linear-gradient(135deg, var(--accent) 0%, #1e40af 100%);
}

.vocab-table thead th {
  padding: 16px 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
  text-transform: uppercase;
  color: #ffffff !important;
  border-bottom: 2px solid rgba(0, 0, 0, 0.1);
  text-align: left;
}

/* Specific alignments for headers */
.vocab-table thead th:nth-child(5) {
  text-align: center; /* Center the Yes/No Contextual Awareness */
}

/* Set precise, proportional desktop column widths for scannability */
.vocab-table th:nth-child(1), .vocab-table td:nth-child(1) { width: 14%; min-width: 140px; }
.vocab-table th:nth-child(2), .vocab-table td:nth-child(2) { width: 22%; min-width: 220px; }
.vocab-table th:nth-child(3), .vocab-table td:nth-child(3) { width: 18%; min-width: 180px; }
.vocab-table th:nth-child(4), .vocab-table td:nth-child(4) { width: 18%; min-width: 180px; }
.vocab-table th:nth-child(5), .vocab-table td:nth-child(5) { width: 10%; min-width: 110px; text-align: center; }
.vocab-table th:nth-child(6), .vocab-table td:nth-child(6) { width: 10%; min-width: 110px; }
.vocab-table th:nth-child(7), .vocab-table td:nth-child(7) { width: 10%; min-width: 110px; }

/* Subtle row borders and padding */
.vocab-table tbody tr {
  border-bottom: 1px solid var(--line);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.vocab-table tbody td {
  padding: 16px 20px;
  vertical-align: middle; /* Vertically align content perfectly */
  line-height: 1.55;
}

/* First column style overrides */
.vocab-table tbody td:first-child {
  font-weight: 700;
  color: var(--accent) !important;
  white-space: normal !important; /* Allow wrapping on technique names so they don't force overflow */
}

/* Style for the highlighting row (Self-Attention) */
.vocab-table tbody tr.highlighted-row {
  background: rgba(15, 118, 110, 0.03); /* Soft teal background */
  position: relative;
}

body.dark-mode .vocab-table tbody tr.highlighted-row {
  background: rgba(15, 118, 110, 0.08); /* Slightly richer in dark mode */
}

/* Hover highlights for rows */
.vocab-table tbody tr:hover {
  background: var(--soft);
}

.vocab-table tbody tr.highlighted-row:hover {
  background: rgba(15, 118, 110, 0.06);
}

body.dark-mode .vocab-table tbody tr.highlighted-row:hover {
  background: rgba(15, 118, 110, 0.12);
}

/* Contextual Awareness Pill Badges */
.vocab-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.vocab-badge-yes {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

body.dark-mode .vocab-badge-yes {
  background-color: rgba(16, 185, 129, 0.18);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}

.vocab-badge-no {
  background-color: rgba(100, 116, 139, 0.08);
  color: var(--muted);
  border: 1px solid rgba(100, 116, 139, 0.15);
}

body.dark-mode .vocab-badge-no {
  background-color: rgba(148, 163, 184, 0.12);
  color: #94a3b8;
  border-color: rgba(148, 163, 184, 0.2);
}

/* Key Applications and Output type items look clean and high-fidelity */
.vocab-table td code {
  background: rgba(180, 83, 9, 0.05) !important;
  border: 1px solid rgba(180, 83, 9, 0.15) !important;
  color: var(--accent-2) !important;
  border-radius: 6px;
  padding: 2px 6px;
  font-family: monospace;
}

body.dark-mode .vocab-table td code {
  background: rgba(245, 158, 11, 0.1) !important;
  border-color: rgba(245, 158, 11, 0.2) !important;
  color: #f59e0b !important;
}

/* Ensure mobile layout elements preserve the layout but apply new styles nicely */
@media (max-width: 768px) {
  .vocab-table-wrap {
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    margin: 16px 0 !important;
  }
  
  .vocab-table {
    display: block;
    width: 100% !important;
    min-width: 0 !important;
    background: transparent !important;
    border: none !important;
  }
  
  .vocab-table thead {
    display: none !important;
  }
  
  .vocab-table tbody {
    display: block;
    width: 100%;
  }
  
  .vocab-table tbody tr {
    display: block;
    width: 100%;
    margin-bottom: 20px;
    border: 1px solid var(--line) !important;
    border-radius: 14px;
    padding: 16px;
    background: var(--panel) !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02) !important;
    box-sizing: border-box;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }
  
  .vocab-table tbody tr:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05) !important;
  }
  
  .vocab-table tbody tr.highlighted-row {
    border-left: 4px solid var(--accent) !important;
  }
  
  .vocab-table tbody td {
    display: flex !important;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0 !important;
    border: none !important;
    border-bottom: 1px solid var(--line) !important;
    width: 100% !important;
    box-sizing: border-box;
    background: transparent !important;
    text-align: right !important;
  }
  
  .vocab-table tbody td:first-child {
    font-weight: 700;
    color: var(--accent) !important;
    white-space: normal !important;
  }
  
  .vocab-badge {
    margin-left: auto; /* align right inside flex */
  }

  .vocab-table tbody td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--muted);
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-right: 16px;
    flex-shrink: 0;
    text-align: left;
  }
  
  .vocab-table tbody td[data-label="Mechanism"],
  .vocab-table tbody td[data-label="Pros / Strengths"],
  .vocab-table tbody td[data-label="Cons / Limitations"],
  .vocab-table tbody td[data-label="Key Applications"] {
    flex-direction: column;
    align-items: stretch;
    border-bottom: none !important;
    text-align: left !important;
    padding-top: 12px !important;
    gap: 6px;
  }
  
  }
}

/* ================================================================
   POSITIONAL ENCODING COMPARISON TABLE — High fidelity, responsive
   ================================================================ */
.pos-table-wrap {
  margin: 32px 0;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(15, 118, 110, 0.08); /* Premium subtle theme-accented shadow */
  border: 1px solid var(--line);
  background: var(--panel);
  overflow-x: auto;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

body.dark-mode .pos-table-wrap {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  border-color: var(--line);
  background: var(--panel);
}

.pos-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.92rem;
  min-width: 1100px; /* Spacious, prevents squishing on desktop */
  background: var(--panel); /* Opaque table background backing */
}

body.dark-mode .pos-table {
  background: var(--panel);
}

/* Stunning gradient header that transitions from accent to secondary color */
.pos-table thead tr {
  background: linear-gradient(135deg, var(--accent) 0%, #0369a1 100%);
}

.pos-table thead th {
  padding: 16px 18px;
  font-weight: 700;
  letter-spacing: 0.05em;
  font-size: 0.82rem;
  text-transform: uppercase;
  color: #ffffff !important;
  border-bottom: 2px solid rgba(0, 0, 0, 0.1);
  text-align: left;
}

/* Column widths on desktop for absolute visual hierarchy and balance */
.pos-table th:nth-child(1), .pos-table td:nth-child(1) { width: 14%; min-width: 140px; }
.pos-table th:nth-child(2), .pos-table td:nth-child(2) { width: 18%; min-width: 180px; }
.pos-table th:nth-child(3), .pos-table td:nth-child(3) { width: 18%; min-width: 180px; }
.pos-table th:nth-child(4), .pos-table td:nth-child(4) { width: 14%; min-width: 140px; }
.pos-table th:nth-child(5), .pos-table td:nth-child(5) { width: 12%; min-width: 120px; }
.pos-table th:nth-child(6), .pos-table td:nth-child(6) { width: 12%; min-width: 130px; text-align: center; }
.pos-table th:nth-child(7), .pos-table td:nth-child(7) { width: 12%; min-width: 160px; text-align: center; }

.pos-table tbody tr {
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.pos-table tbody td {
  padding: 16px 18px;
  vertical-align: middle;
  line-height: 1.55;
  color: var(--ink);
  background: var(--panel); /* Solid cell background prevents scroll background leakage */
  border-bottom: 1px solid var(--line); /* Border on td is fully supported in separate-border collapse mode */
}

body.dark-mode .pos-table tbody td {
  color: #d1d5db;
  background: #111827; /* Rich dark mode cell background */
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pos-table tbody tr:last-child td {
  border-bottom: none; /* Prevent double borders at the very bottom */
}

/* Style for the highlighting row (Sinusoidal PE) */
.pos-table tbody tr.highlighted-row td {
  background: #f8fbfb; /* Solid light theme highlight (blended 3% teal over #ffffff) */
}

body.dark-mode .pos-table tbody tr.highlighted-row td {
  background: rgba(45, 212, 191, 0.08); /* Glowing translucent cyber-teal highlight */
}

.pos-table tbody td:first-child {
  font-weight: 700;
  color: var(--accent) !important;
  white-space: normal !important;
}

body.dark-mode .pos-table tbody td:first-child {
  color: #38bdf8 !important; /* Brighter sky blue in dark mode */
}

/* Hover highlights for standard rows mapped to tds */
.pos-table tbody tr:hover td {
  background: var(--soft) !important;
}

body.dark-mode .pos-table tbody tr:hover td {
  background: rgba(56, 189, 248, 0.06) !important; /* Beautiful sky blue hover glow */
}

/* Hover highlights for highlighted row mapped to tds */
.pos-table tbody tr.highlighted-row:hover td {
  background: #f1f7f6 !important; /* Solid highlighted hover (blended 6% teal over #ffffff) */
}

body.dark-mode .pos-table tbody tr.highlighted-row:hover td {
  background: rgba(45, 212, 191, 0.15) !important; /* Glowing highlighted hover */
}

/* Beautiful custom badges for table data representation */
.pos-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  font-size: 0.76rem;
  font-weight: 700;
  border-radius: 8px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  white-space: nowrap; /* Prevent any text wrapping inside the badge */
}

/* Cell badge wrapper for vertical stacking and visual clean-up */
.pos-cell-badge-wrapper {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.pos-badge-sub {
  font-size: 0.8em;
  color: var(--muted);
  font-weight: 500;
  white-space: nowrap;
}

body.dark-mode .pos-badge-sub {
  color: var(--muted);
}

.pos-badge-sub-warning {
  font-size: 0.78em;
  font-weight: 600;
  color: #b45309;
  white-space: nowrap;
}

body.dark-mode .pos-badge-sub-warning {
  color: #fbbf24;
}

/* Representation badges */
.pos-badge-vector {
  background-color: rgba(14, 116, 144, 0.08);
  color: #0e7490;
  border: 1px solid rgba(14, 116, 144, 0.15);
}
body.dark-mode .pos-badge-vector {
  background-color: rgba(34, 211, 238, 0.12);
  color: #22d3ee;
  border-color: rgba(34, 211, 238, 0.2);
}

.pos-badge-scalar {
  background-color: rgba(217, 119, 6, 0.08);
  color: #d97706;
  border: 1px solid rgba(217, 119, 6, 0.15);
}
body.dark-mode .pos-badge-scalar {
  background-color: rgba(251, 191, 36, 0.12);
  color: #fbbf24;
  border-color: rgba(251, 191, 36, 0.2);
}

/* Positional Relationship Badges */
.pos-badge-absolute {
  background-color: rgba(109, 40, 217, 0.08);
  color: #6d28d9;
  border: 1px solid rgba(109, 40, 217, 0.15);
}
body.dark-mode .pos-badge-absolute {
  background-color: rgba(167, 139, 250, 0.12);
  color: #a78bfa;
  border-color: rgba(167, 139, 250, 0.2);
}

.pos-badge-relative {
  background-color: rgba(29, 78, 216, 0.08);
  color: #1d4ed8;
  border: 1px solid rgba(29, 78, 216, 0.15);
}
body.dark-mode .pos-badge-relative {
  background-color: rgba(96, 165, 250, 0.12);
  color: #60a5fa;
  border-color: rgba(96, 165, 250, 0.2);
}

.pos-badge-both {
  background-color: rgba(4, 120, 87, 0.08);
  color: #047857;
  border: 1px solid rgba(4, 120, 87, 0.15);
}
body.dark-mode .pos-badge-both {
  background-color: rgba(52, 211, 153, 0.12);
  color: #34d399;
  border-color: rgba(52, 211, 153, 0.2);
}

/* Table code styling */
.pos-table td code {
  background: rgba(15, 118, 110, 0.04) !important;
  border: 1px solid rgba(15, 118, 110, 0.12) !important;
  color: var(--accent) !important;
  border-radius: 6px;
  padding: 2px 6px;
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.85em;
}
body.dark-mode .pos-table td code {
  background: rgba(56, 189, 248, 0.08) !important;
  border-color: rgba(56, 189, 248, 0.15) !important;
  color: #38bdf8 !important;
}

/* ================================================================
   MOBILE RESPONSIVE LAYOUT — Transforms into elegant cards below 768px
   ================================================================ */
@media (max-width: 768px) {
  .pos-table-wrap {
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    margin: 16px 0 !important;
  }
  
  .pos-table {
    display: block;
    width: 100% !important;
    min-width: 0 !important;
    background: transparent !important;
    border: none !important;
  }
  
  .pos-table thead {
    display: none !important;
  }
  
  .pos-table tbody {
    display: block;
    width: 100%;
  }
  
  .pos-table tbody tr {
    display: block;
    width: 100%;
    margin-bottom: 24px;
    border: 1px solid var(--line) !important;
    border-radius: 14px;
    padding: 16px 20px;
    background: var(--panel) !important;
    box-shadow: 0 4px 15px rgba(31, 41, 51, 0.03) !important;
    box-sizing: border-box;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }
  
  body.dark-mode .pos-table tbody tr {
    border-color: var(--line) !important;
    background: var(--panel) !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2) !important;
  }

  .pos-table tbody tr.highlighted-row {
    border: 1px solid rgba(15, 118, 110, 0.3) !important;
    background: #f8fbfb !important;
    box-shadow: 0 4px 20px rgba(15, 118, 110, 0.06) !important;
  }

  body.dark-mode .pos-table tbody tr.highlighted-row {
    border-color: rgba(45, 212, 191, 0.4) !important;
    background: rgba(45, 212, 191, 0.08) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35) !important;
  }
  
  .pos-table tbody tr:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 24px rgba(31, 41, 51, 0.06) !important;
  }
  
  body.dark-mode .pos-table tbody tr:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3) !important;
  }
  
  .pos-table tbody td {
    display: flex !important;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0 !important;
    border: none !important;
    border-bottom: 1px solid var(--line) !important;
    width: 100% !important;
    box-sizing: border-box;
    background: transparent !important;
    text-align: right !important;
  }
  
  body.dark-mode .pos-table tbody td {
    border-bottom-color: var(--line) !important;
  }
  
  .pos-table tbody td:first-child {
    font-weight: 700;
    color: var(--accent) !important;
    font-size: 1.05rem;
    border-bottom: 2px solid var(--line) !important;
    padding-bottom: 12px !important;
    margin-bottom: 6px;
    justify-content: center !important;
    text-align: center !important;
    display: block !important;
  }

  body.dark-mode .pos-table tbody td:first-child {
    border-bottom-color: rgba(255, 255, 255, 0.1) !important;
  }
  
  .pos-table tbody td:last-child {
    border-bottom: none !important;
  }
  
  .pos-badge {
    margin-left: auto; /* align right inside flex */
  }

  .pos-cell-badge-wrapper {
    align-items: flex-end !important; /* Right-align flex children (badge + sub) on mobile */
    margin-left: auto;
  }

  .pos-table tbody td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--muted);
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-right: 16px;
    flex-shrink: 0;
    text-align: left;
  }
  
  /* Make description, advantages, limitations blocks stack fully for readable paragraph formatting on mobile */
  .pos-table tbody td[data-label="Approach Description"],
  .pos-table tbody td[data-label="Key Advantages"],
  .pos-table tbody td[data-label="Identified Limitations"] {
    flex-direction: column;
    align-items: stretch;
    text-align: left !important;
    padding-top: 12px !important;
    gap: 6px;
  }
  
  .pos-table tbody td[data-label="Approach Description"]::before,
  .pos-table tbody td[data-label="Key Advantages"]::before,
  .pos-table tbody td[data-label="Identified Limitations"]::before {
    margin-bottom: 2px;
    text-align: left;
  }
}