:root{--bg:#f7f8fb;--surface:#fff;--surface-2:#eef2f7;--text:#121826;--muted:#5e6878;--line:#dfe5ec;--navy:#0b1220;--navy-2:#111c32;--blue:#3776ab;--blue-2:#2f6e9f;--yellow:#ffd343;--yellow-2:#f6c62f;--green:#2bb673;--code:#0d1628;--shadow:0 18px 60px rgba(11,18,32,.10);--radius:18px;--max:1240px;--sans:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace}
html[data-theme="dark"]{--bg:#08101e;--surface:#0e182a;--surface-2:#152238;--text:#eef4ff;--muted:#a8b3c4;--line:#25344d;--navy:#050a13;--navy-2:#0a1323;--code:#050a13;--shadow:0 18px 60px rgba(0,0,0,.28)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}body{margin:0;font-family:var(--sans);font-size:17px;line-height:1.7;color:var(--text);background:var(--bg)}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.skip-link{position:fixed;left:12px;top:-80px;z-index:999;background:var(--yellow);color:#111;padding:10px 14px;border-radius:10px;font-weight:800}.skip-link:focus{top:12px}.reading-progress{position:fixed;inset:0 0 auto;height:3px;z-index:1000;background:transparent}.reading-progress span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--blue),var(--yellow))}.site-header{position:sticky;top:0;z-index:100;display:flex;align-items:center;gap:30px;height:76px;padding:0 max(24px,calc((100vw - var(--max))/2));background:color-mix(in srgb,var(--surface) 92%,transparent);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:11px;color:var(--text);min-width:max-content}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:43px;height:43px;border-radius:13px;background:linear-gradient(145deg,var(--blue) 0 52%,var(--yellow) 52%);box-shadow:0 8px 20px rgba(55,118,171,.24)}.brand-mark span{font:800 15px var(--mono);color:#fff;text-shadow:0 1px 2px #0008}.brand>span:last-child{display:flex;flex-direction:column;line-height:1.05}.brand strong{font-size:16px}.brand small{font-size:12px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-top:4px}.header-nav{display:flex;gap:26px;margin-left:auto}.header-nav a{color:var(--text);font-size:14px;font-weight:700}.header-actions{display:flex;gap:8px}.icon-button,.menu-button{height:40px;border:1px solid var(--line);border-radius:11px;background:var(--surface);color:var(--text);font:700 14px var(--sans);cursor:pointer}.icon-button{width:40px}.menu-button{display:none;padding:0 14px}.hero{overflow:hidden;padding:84px 24px 90px;background:radial-gradient(circle at 80% 0%,rgba(55,118,171,.36),transparent 34%),linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff}.hero-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}.eyebrow{margin:0 0 12px;color:var(--blue);font-size:12px;font-weight:900;letter-spacing:.16em;text-transform:uppercase}.hero .eyebrow,.philosophy-band .eyebrow{color:var(--yellow)}.hero h1{max-width:760px;margin:0;font-size:clamp(3rem,6vw,5.5rem);line-height:.98;letter-spacing:-.055em}.hero-lead{max-width:690px;margin:27px 0 0;color:#c7d2e3;font-size:20px;line-height:1.6}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 20px;border-radius:13px;font-size:14px;font-weight:850}.button:hover{text-decoration:none;transform:translateY(-1px)}.button.primary{background:var(--yellow);color:#111827}.button.secondary{border:1px solid #ffffff35;background:#ffffff0b;color:#fff}.hero-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:25px;color:#9fb0c8;font-size:13px}.hero-meta span:before{content:"✓";color:var(--yellow);margin-right:7px}.terminal{border:1px solid #ffffff20;border-radius:20px;background:#08101ee8;box-shadow:0 30px 90px #0007;overflow:hidden;transform:rotate(1.3deg)}.terminal-bar{height:47px;display:flex;align-items:center;gap:7px;padding:0 15px;border-bottom:1px solid #ffffff12;background:#ffffff08}.terminal-bar span{width:10px;height:10px;border-radius:50%;background:#ff6b6b}.terminal-bar span:nth-child(2){background:#ffd166}.terminal-bar span:nth-child(3){background:#52d273}.terminal-bar b{margin:auto;color:#8290a6;font:500 12px var(--mono)}.terminal pre{margin:0;padding:30px;overflow:auto}.terminal code{color:#dfe8f6;font:15px/1.8 var(--mono)}.c-purple{color:#d39aff}.c-blue{color:#70c7ff}.c-yellow{color:#ffd86f}.c-muted{color:#708099}.section{max-width:var(--max);margin:auto;padding:92px 24px}.section-heading{max-width:690px}.section-heading h2,.practice-callout h2{margin:0;font-size:clamp(2rem,4vw,3.5rem);line-height:1.1;letter-spacing:-.035em}.section-heading>p:last-child{color:var(--muted);font-size:18px}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:42px}.topic-card{position:relative;display:block;padding:27px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--text);transition:.2s ease}.topic-card:hover{border-color:var(--blue);box-shadow:var(--shadow);transform:translateY(-3px);text-decoration:none}.topic-card>span{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;background:color-mix(in srgb,var(--blue) 12%,var(--surface));color:var(--blue);font-size:12px;font-weight:900}.topic-card h3{margin:20px 0 7px;font-size:20px}.topic-card p{margin:0;color:var(--muted);font-size:15px}.philosophy-band{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;padding:76px max(24px,calc((100vw - var(--max))/2));background:var(--navy);color:#fff}.philosophy-band h2{font-size:clamp(2.2rem,4vw,4rem);line-height:1.05;margin:0}.philosophy-band p{color:#bdc8d9}.philosophy-band blockquote{margin:0;padding:26px 0 26px 28px;border-left:4px solid var(--yellow);font-size:22px;line-height:1.55;color:#f4f7fb}.philosophy-band cite{display:block;margin-top:16px;color:#8fa0b8;font-size:13px;font-style:normal}.practice-callout{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.practice-callout>div>p:last-child{color:var(--muted)}.practice-steps{display:grid;grid-template-columns:1fr 1fr;gap:12px}.practice-steps span{display:flex;align-items:center;gap:12px;padding:17px;border:1px solid var(--line);border-radius:14px;background:var(--surface);font-weight:800}.practice-steps b{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--yellow);color:#111}.guide-shell{max-width:1500px;margin:0 auto 90px;padding:0 24px;display:grid;grid-template-columns:300px minmax(0,1fr);gap:28px;align-items:start}.sidebar{position:sticky;top:96px;max-height:calc(100vh - 120px);overflow:auto;border:1px solid var(--line);border-radius:16px;background:var(--surface)}.sidebar-inner{padding:18px}.search-wrap label{display:block;margin-bottom:8px;font-size:13px;font-weight:900}.search-control{position:relative}.search-control input{width:100%;height:44px;padding:0 42px 0 12px;border:1px solid var(--line);border-radius:11px;background:var(--bg);color:var(--text);font:14px var(--sans);outline:none}.search-control input:focus{border-color:var(--blue);box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 15%,transparent)}.search-control kbd{position:absolute;right:10px;top:10px;padding:2px 7px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--muted);font:12px var(--mono)}#searchStatus{min-height:20px;margin:7px 0 0;color:var(--muted);font-size:12px}.sidebar-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin:12px 0 18px}.sidebar-actions button,.toc-title button{border:1px solid var(--line);border-radius:9px;background:var(--surface-2);color:var(--text);padding:8px;font:700 12px var(--sans);cursor:pointer}.toc-title{display:flex;align-items:center;justify-content:space-between;padding:12px 0 8px;border-top:1px solid var(--line);font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.1em}.toc{display:flex;flex-direction:column;gap:2px}.toc a{display:block;padding:7px 9px;border-radius:8px;color:var(--muted);font-size:13px;line-height:1.3}.toc a:hover,.toc a.active{background:color-mix(in srgb,var(--blue) 11%,var(--surface));color:var(--blue);text-decoration:none}.toc .level-2{padding-left:18px;font-size:12px}.toc .level-3{padding-left:29px;font-size:11px}.guide-content{min-width:0;border:1px solid var(--line);border-radius:20px;background:var(--surface);box-shadow:var(--shadow);overflow:hidden}.guide-intro{padding:44px 52px;background:linear-gradient(135deg,color-mix(in srgb,var(--blue) 10%,var(--surface)),var(--surface))}.guide-intro h2{margin:0;font-size:clamp(2.2rem,4vw,4rem);letter-spacing:-.045em}.guide-intro>p:last-of-type{max-width:760px;color:var(--muted)}.guide-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.guide-stats span{padding:8px 11px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-size:12px;color:var(--muted)}.guide-stats b{color:var(--text)}#content{padding:20px 52px 70px}#content>.section-card,#content>section{padding:36px 0;border-bottom:1px solid var(--line)}#content>.section-card:last-child,#content>section:last-child{border-bottom:0}#content h1,#content h2,#content h3,#content h4{color:var(--text);line-height:1.25;scroll-margin-top:100px}#content h1{margin:0 0 22px;font-size:clamp(1.8rem,3vw,2.7rem);letter-spacing:-.03em}#content h2{margin:38px 0 13px;font-size:clamp(1.35rem,2.2vw,1.9rem)}#content h3{margin:30px 0 10px;font-size:1.22rem}#content p,#content li{color:var(--text)}#content ul,#content ol{padding-left:1.35rem}#content .heading-anchor{opacity:0;color:var(--blue)}#content h1:hover .heading-anchor,#content h2:hover .heading-anchor,#content h3:hover .heading-anchor{opacity:1}#content table{display:block;width:100%;overflow:auto;border-collapse:collapse;margin:18px 0 28px;border:1px solid var(--line);border-radius:12px}#content thead{background:var(--surface-2)}#content th,#content td{min-width:150px;padding:12px 14px;border:1px solid var(--line);text-align:left;vertical-align:top;font-size:14px}#content code{font-family:var(--mono);font-size:.9em;padding:.15em .36em;border:1px solid color-mix(in srgb,var(--blue) 24%,var(--line));border-radius:5px;background:color-mix(in srgb,var(--blue) 8%,var(--surface));color:var(--text)}#content pre{position:relative;margin:18px 0 28px;padding:22px;overflow:auto;border:1px solid #23324a;border-radius:14px;background:var(--code);box-shadow:0 10px 35px #0001}#content pre code{padding:0;border:0;background:none;color:#dce7f7;font:14px/1.65 var(--mono)}.copy-code{position:absolute;top:9px;right:9px;border:1px solid #ffffff22;border-radius:8px;background:#ffffff12;color:#dce7f7;padding:6px 9px;font:700 11px var(--sans);cursor:pointer}#content blockquote{margin:20px 0;padding:18px 20px;border-left:4px solid var(--yellow);background:var(--surface-2);border-radius:0 12px 12px 0}#content img{max-width:100%;height:auto;border-radius:12px}.poke-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.poke-card{padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2);text-align:center}.poke-card img{max-height:220px;object-fit:contain}.notice{padding:15px 17px;border:1px solid color-mix(in srgb,var(--green) 35%,var(--line));border-radius:12px;background:color-mix(in srgb,var(--green) 10%,var(--surface))}mark.search-hit{padding:1px 2px;border-radius:3px;background:var(--yellow);color:#111}.search-hidden{display:none!important}.site-footer{display:grid;grid-template-columns:1.3fr .6fr 1fr;gap:60px;padding:55px max(24px,calc((100vw - var(--max))/2));border-top:1px solid var(--line);background:var(--surface)}.site-footer>div{display:flex;flex-direction:column;align-items:flex-start;gap:7px}.site-footer p{margin:8px 0;color:var(--muted);font-size:14px}.site-footer a{color:var(--muted);font-size:14px}.site-footer strong{color:var(--text)}.footer-brand{margin-bottom:7px}.back-to-top{position:fixed;right:22px;bottom:22px;z-index:90;width:44px;height:44px;border:0;border-radius:14px;background:var(--yellow);color:#111;font-size:20px;font-weight:900;box-shadow:0 12px 30px #0003;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(10px);transition:.2s}.back-to-top.visible{opacity:1;pointer-events:auto;transform:none}
@media(max-width:1050px){.header-nav{display:none}.menu-button{display:block}.hero-grid{grid-template-columns:1fr}.terminal{max-width:720px}.topic-grid{grid-template-columns:repeat(2,1fr)}.guide-shell{grid-template-columns:1fr}.sidebar{position:fixed;inset:77px 0 0 auto;z-index:80;width:min(360px,92vw);max-height:none;border-radius:0;transform:translateX(105%);transition:.25s}.sidebar.open{transform:none}.philosophy-band,.practice-callout{grid-template-columns:1fr}.site-footer{grid-template-columns:1fr 1fr}}
@media(max-width:700px){body{font-size:16px}.site-header{height:68px;padding:0 16px}.brand-mark{width:39px;height:39px}.hero{padding:65px 18px}.hero h1{font-size:clamp(2.55rem,13vw,4.1rem)}.hero-lead{font-size:17px}.terminal pre{padding:20px}.terminal code{font-size:12px}.section{padding:66px 18px}.topic-grid{grid-template-columns:1fr}.philosophy-band{padding:62px 20px;gap:35px}.practice-callout{gap:30px}.practice-steps{grid-template-columns:1fr 1fr}.guide-shell{padding:0 10px;margin-bottom:50px}.guide-intro{padding:34px 24px}#content{padding:10px 24px 50px}#content>.section-card,#content>section{padding:30px 0}.poke-grid{grid-template-columns:1fr}.site-footer{grid-template-columns:1fr;padding:45px 22px}.back-to-top{right:14px;bottom:14px}}
@media print{.site-header,.hero,.overview,.philosophy-band,.practice-callout,.sidebar,.site-footer,.back-to-top,.reading-progress,.copy-code{display:none!important}.guide-shell{display:block;padding:0}.guide-content{border:0;box-shadow:none}.guide-intro,#content{padding:0}body{background:white;color:black}#content pre{white-space:pre-wrap;break-inside:avoid}}


/* Cyberpunk visual layer */
:root {
  --cyber-cyan: #39e7ff;
  --cyber-blue: #149bff;
  --cyber-violet: #b267ff;
  --cyber-magenta: #ff4fd8;
  --cyber-yellow: #ffd343;
}

html[data-theme="dark"] {
  --bg: #050913;
  --surface: #0a1220;
  --surface-2: #0f1b2d;
  --text: #edf8ff;
  --muted: #9db1c7;
  --line: #1b3950;
  --navy: #030711;
  --navy-2: #071426;
  --blue: var(--cyber-cyan);
  --blue-2: var(--cyber-blue);
  --yellow: var(--cyber-yellow);
  --code: #030812;
  --shadow: 0 18px 60px rgba(0,0,0,.38), 0 0 30px rgba(57,231,255,.06);
}

html[data-theme="light"] {
  --bg: #f4f8fb;
  --surface: #ffffff;
  --surface-2: #edf5fa;
  --line: #cbdde8;
  --blue: #087fb5;
  --yellow: #f2c332;
}

body {
  background-image:
    linear-gradient(rgba(57,231,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57,231,255,.022) 1px, transparent 1px);
  background-size: 42px 42px;
}

.site-header {
  border-bottom-color: color-mix(in srgb, var(--cyber-cyan) 28%, var(--line));
  box-shadow: 0 7px 28px rgba(0,0,0,.15);
}

.brand-mark {
  width: 50px;
  height: 50px;
  border-radius: 13px;
  padding: 4px;
  background: linear-gradient(145deg, rgba(57,231,255,.13), rgba(255,211,67,.12));
  border: 1px solid rgba(57,231,255,.28);
  box-shadow: 0 0 0 1px rgba(255,211,67,.08) inset, 0 0 18px rgba(57,231,255,.16);
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0 5px rgba(57,231,255,.22));
}

.brand small {
  color: color-mix(in srgb, var(--cyber-cyan) 70%, var(--muted));
}

.hero {
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(circle at 78% 10%, rgba(178,103,255,.18), transparent 30%),
    radial-gradient(circle at 20% 85%, rgba(57,231,255,.13), transparent 34%),
    linear-gradient(135deg, #020711 0%, #071526 55%, #0b1220 100%);
  border-bottom: 1px solid rgba(57,231,255,.22);
}

.cyber-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .28;
  background-image:
    linear-gradient(rgba(57,231,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57,231,255,.08) 1px, transparent 1px);
  background-size: 58px 58px;
  mask-image: linear-gradient(to bottom, black, transparent 90%);
}

.hero h1 {
  text-shadow: 0 0 24px rgba(57,231,255,.11);
}

.hero .eyebrow,
.philosophy-band .eyebrow {
  color: var(--cyber-yellow);
  text-shadow: 0 0 10px rgba(255,211,67,.18);
}

.button.primary {
  box-shadow: 0 0 22px rgba(255,211,67,.16);
}

.button.secondary {
  border-color: rgba(57,231,255,.30);
  box-shadow: inset 0 0 18px rgba(57,231,255,.035);
}

.button.secondary:hover,
.icon-button:hover,
.menu-button:hover {
  border-color: var(--cyber-cyan);
  box-shadow: 0 0 15px rgba(57,231,255,.12);
}

.terminal {
  border-color: rgba(57,231,255,.28);
  box-shadow: 0 30px 90px rgba(0,0,0,.55), 0 0 38px rgba(57,231,255,.08);
}

.terminal-bar {
  background: linear-gradient(90deg, rgba(57,231,255,.08), rgba(178,103,255,.06));
}

.topic-card,
.practice-steps span,
.button {
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.topic-card {
  overflow: hidden;
}

.topic-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyber-cyan));
  opacity: .65;
}

.topic-card:hover {
  border-color: color-mix(in srgb, var(--cyber-cyan) 72%, var(--line));
  box-shadow: var(--shadow), 0 0 25px rgba(57,231,255,.08);
}

.topic-card > span {
  border: 1px solid color-mix(in srgb, var(--cyber-cyan) 26%, transparent);
}

.philosophy-band {
  background:
    linear-gradient(110deg, rgba(57,231,255,.045), transparent 38%),
    linear-gradient(135deg, #040914, #071426);
  border-block: 1px solid rgba(57,231,255,.16);
}

.practice-steps span:hover {
  border-color: color-mix(in srgb, var(--cyber-cyan) 55%, var(--line));
  transform: translateY(-2px);
  box-shadow: 0 0 18px rgba(57,231,255,.07);
}

.sidebar,
.guide-content {
  border-color: color-mix(in srgb, var(--cyber-cyan) 16%, var(--line));
}

.guide-intro {
  background:
    linear-gradient(120deg, rgba(57,231,255,.075), transparent 40%),
    linear-gradient(135deg, color-mix(in srgb,var(--blue) 7%,var(--surface)), var(--surface));
}

.search-control input:focus {
  box-shadow: 0 0 0 3px rgba(57,231,255,.10), 0 0 18px rgba(57,231,255,.08);
}

.toc a.active {
  border-left: 2px solid var(--cyber-cyan);
}

#content pre {
  border-color: color-mix(in srgb, var(--cyber-cyan) 18%, var(--line));
  box-shadow: inset 3px 0 0 rgba(57,231,255,.25);
}

.reading-progress span {
  background: linear-gradient(90deg, var(--cyber-cyan), var(--cyber-violet), var(--cyber-yellow));
  box-shadow: 0 0 10px rgba(57,231,255,.45);
}

::selection {
  background: rgba(57,231,255,.28);
  color: var(--text);
}

@media (max-width: 700px) {
  .brand-mark {
    width: 43px;
    height: 43px;
  }

  .cyber-grid {
    background-size: 38px 38px;
  }
}


/* Expanded educational sections */
.philosophy-expanded {
  align-items: start;
  gap: clamp(2rem, 5vw, 5rem);
}

.philosophy-intro {
  position: sticky;
  top: 110px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin-top: 1rem;
  font-weight: 800;
  color: var(--cyber-cyan);
}

.text-link:hover {
  color: var(--cyber-yellow);
}

.zen-panel {
  padding: clamp(1.25rem, 3vw, 2.1rem);
  border: 1px solid rgba(57, 231, 255, .24);
  background: linear-gradient(145deg, rgba(4, 11, 23, .95), rgba(10, 25, 42, .9));
  box-shadow: 0 25px 70px rgba(0, 0, 0, .34), inset 3px 0 0 rgba(255, 211, 67, .75);
}

.zen-heading {
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-bottom: 1.15rem;
}

.zen-heading h3 {
  margin: 0;
  color: var(--text);
  font-size: 1.3rem;
}

.terminal-prompt {
  color: var(--cyber-yellow);
  font-family: var(--mono);
  font-weight: 900;
  text-shadow: 0 0 12px rgba(255, 211, 67, .28);
}

.zen-list {
  columns: 2 280px;
  column-gap: 2.4rem;
  margin: 0;
  padding-left: 1.35rem;
}

.zen-list li {
  break-inside: avoid;
  margin: 0 0 .6rem;
  color: color-mix(in srgb, var(--text) 90%, var(--muted));
  line-height: 1.5;
}

.zen-list li::marker {
  color: var(--cyber-cyan);
  font-family: var(--mono);
  font-weight: 800;
}

.feature-section {
  padding-block: clamp(4rem, 8vw, 7rem);
}

.curiosity-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.info-card,
.command-card,
.comparison-card {
  position: relative;
  border: 1px solid color-mix(in srgb, var(--cyber-cyan) 18%, var(--line));
  background: linear-gradient(145deg, color-mix(in srgb, var(--surface) 94%, var(--cyber-cyan)), var(--surface));
  padding: 1.45rem;
  overflow: hidden;
}

.info-card::before,
.command-card::before,
.comparison-card::before {
  content: "";
  position: absolute;
  width: 48px;
  height: 2px;
  top: 0;
  right: 0;
  background: linear-gradient(90deg, transparent, var(--cyber-cyan));
}

.info-card h3,
.command-card h3,
.comparison-card h3 {
  margin-top: .8rem;
}

.card-number {
  font-family: var(--mono);
  font-weight: 900;
  color: var(--cyber-yellow);
  font-size: .85rem;
}

.venv-grid {
  display: grid;
  grid-template-columns: .85fr 1.35fr .85fr;
  gap: 1rem;
  align-items: start;
}

.command-title {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.command-title span {
  display: grid;
  place-items: center;
  flex: 0 0 2rem;
  height: 2rem;
  border: 1px solid rgba(57, 231, 255, .35);
  color: var(--cyber-cyan);
  font-family: var(--mono);
  font-weight: 900;
}

.command-title h3 {
  margin: 0;
}

.command-card pre,
.typing-explanation pre {
  overflow-x: auto;
  margin: 1rem 0;
  padding: 1rem;
  border: 1px solid rgba(57, 231, 255, .18);
  background: #030812;
  color: #eafaff;
}

.typing-section {
  border-top: 1px solid rgba(57, 231, 255, .12);
}

.typing-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.typing-explanation {
  max-width: 780px;
}

.comparison-panel {
  display: grid;
  gap: 1rem;
}

.comparison-card:first-child {
  box-shadow: inset 3px 0 0 var(--cyber-cyan);
}

.comparison-card:last-child {
  box-shadow: inset 3px 0 0 var(--cyber-yellow);
}

.comparison-card ul {
  margin-bottom: 0;
  padding-left: 1.15rem;
}

@media (max-width: 1050px) {
  .curiosity-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .venv-grid {
    grid-template-columns: 1fr;
  }

  .typing-layout {
    grid-template-columns: 1fr;
  }

  .philosophy-intro {
    position: static;
  }
}

@media (max-width: 700px) {
  .curiosity-grid {
    grid-template-columns: 1fr;
  }

  .zen-list {
    columns: 1;
  }

  .zen-panel,
  .info-card,
  .command-card,
  .comparison-card {
    padding: 1.1rem;
  }
}

@media print {
  .philosophy-intro {
    position: static;
  }

  .zen-panel,
  .info-card,
  .command-card,
  .comparison-card {
    box-shadow: none;
  }
}


/* Algorithms video section */
.algorithms-section {
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(57, 231, 255, .12);
  border-bottom: 1px solid rgba(57, 231, 255, .12);
  background:
    radial-gradient(circle at 86% 18%, rgba(178, 103, 255, .09), transparent 30%),
    radial-gradient(circle at 12% 80%, rgba(57, 231, 255, .07), transparent 32%);
}

.algorithms-section::before {
  content: "SORT // COMPARE // VISUALIZE";
  position: absolute;
  top: 1.2rem;
  right: 2rem;
  color: rgba(57, 231, 255, .10);
  font-family: var(--mono);
  font-size: clamp(.72rem, 1.2vw, .95rem);
  font-weight: 900;
  letter-spacing: .18em;
  pointer-events: none;
}

.algorithms-heading {
  max-width: 820px;
}

.video-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(260px, .55fr);
  gap: clamp(1rem, 3vw, 2rem);
  align-items: stretch;
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  min-width: 0;
  overflow: hidden;
  border: 1px solid rgba(57, 231, 255, .32);
  background: #02050b;
  box-shadow:
    0 30px 85px rgba(0, 0, 0, .42),
    0 0 35px rgba(57, 231, 255, .09);
}

.video-frame::before,
.video-frame::after {
  content: "";
  position: absolute;
  z-index: 2;
  width: 68px;
  height: 3px;
  pointer-events: none;
}

.video-frame::before {
  top: 0;
  left: 0;
  background: var(--cyber-cyan);
  box-shadow: 0 0 14px rgba(57, 231, 255, .7);
}

.video-frame::after {
  right: 0;
  bottom: 0;
  background: var(--cyber-yellow);
  box-shadow: 0 0 14px rgba(255, 211, 67, .55);
}

.video-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-notes {
  position: relative;
  padding: clamp(1.2rem, 3vw, 1.8rem);
  border: 1px solid color-mix(in srgb, var(--cyber-violet) 34%, var(--line));
  background:
    linear-gradient(145deg, rgba(178, 103, 255, .07), transparent 42%),
    var(--surface);
  box-shadow: inset 3px 0 0 rgba(178, 103, 255, .55);
}

.video-notes h3 {
  margin: .65rem 0 1rem;
}

.video-notes ul {
  margin: 0 0 1.4rem;
  padding-left: 1.2rem;
}

.video-notes li + li {
  margin-top: .55rem;
}

.video-label {
  display: inline-flex;
  padding: .35rem .55rem;
  border: 1px solid rgba(255, 211, 67, .28);
  color: var(--cyber-yellow);
  font-family: var(--mono);
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.video-link {
  width: 100%;
  justify-content: center;
}

@media (max-width: 900px) {
  .video-feature {
    grid-template-columns: 1fr;
  }

  .video-notes {
    box-shadow: inset 0 3px 0 rgba(178, 103, 255, .55);
  }
}

@media (max-width: 700px) {
  .algorithms-section::before {
    display: none;
  }

  .video-frame {
    width: calc(100% + 1rem);
    margin-left: -.5rem;
  }
}

@media print {
  .video-frame {
    aspect-ratio: auto;
    min-height: 220px;
    box-shadow: none;
  }

  .video-frame iframe {
    display: none;
  }

  .video-frame::before {
    content: "Video: Visualization and Comparison of Sorting Algorithms";
    display: block;
    position: static;
    width: auto;
    height: auto;
    padding: 1rem;
    color: black;
    background: white;
    box-shadow: none;
  }
}


/* Zen of Python contrast and readability fix */
.philosophy-band {
  color: #eef7ff;
}

.philosophy-band .philosophy-intro h2 {
  color: #ffffff !important;
  text-shadow: 0 0 22px rgba(57, 231, 255, .10);
}

.philosophy-band .philosophy-intro p:not(.eyebrow) {
  color: #c7d7e8 !important;
}

.philosophy-band .philosophy-intro em {
  color: #f4f8ff;
}

.philosophy-band .text-link {
  color: #43e7ff !important;
}

.philosophy-band .text-link:hover,
.philosophy-band .text-link:focus-visible {
  color: #ffd343 !important;
}

.zen-panel {
  color: #eaf6ff;
  background:
    linear-gradient(145deg, rgba(9, 20, 36, .98), rgba(4, 12, 24, .98)) !important;
}

.zen-heading h3 {
  color: #ffffff !important;
  font-weight: 800;
  letter-spacing: .01em;
}

.zen-list li {
  color: #d7e7f5 !important;
  font-weight: 560;
}

.zen-list li em {
  color: #ffffff;
}

.zen-list li::marker {
  color: #39e7ff !important;
}

.terminal-prompt {
  color: #ffd343 !important;
}

html[data-theme="light"] .philosophy-band {
  background:
    radial-gradient(circle at 80% 10%, rgba(57, 231, 255, .08), transparent 32%),
    linear-gradient(135deg, #07111f, #0a1828) !important;
}

html[data-theme="light"] .philosophy-band .philosophy-intro h2,
html[data-theme="light"] .zen-heading h3 {
  color: #ffffff !important;
}

html[data-theme="light"] .philosophy-band .philosophy-intro p:not(.eyebrow),
html[data-theme="light"] .zen-list li {
  color: #d7e7f5 !important;
}

html[data-theme="light"] .philosophy-band .text-link {
  color: #43e7ff !important;
}

html[data-theme="light"] .zen-panel {
  background:
    linear-gradient(145deg, rgba(9, 20, 36, .98), rgba(4, 12, 24, .98)) !important;
  border-color: rgba(57, 231, 255, .34);
}

/* Make the Zen list easier to scan */
.zen-list li {
  padding-left: .25rem;
  margin-bottom: .72rem;
  line-height: 1.58;
}

.zen-list li:hover {
  color: #ffffff !important;
}

@media (max-width: 700px) {
  .philosophy-band .philosophy-intro h2 {
    font-size: clamp(2.15rem, 11vw, 3.35rem);
  }

  .zen-list li {
    font-size: .98rem;
  }
}


/* Search results and improved current-location tracking */
.search-results {
  display: grid;
  gap: 5px;
  max-height: 310px;
  margin: 8px 0 14px;
  padding: 6px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg);
}

.search-results[hidden] {
  display: none;
}

.search-result {
  display: grid;
  gap: 2px;
  padding: 9px 10px;
  border-radius: 8px;
  color: var(--text);
  line-height: 1.25;
}

.search-result:hover,
.search-result:focus-visible {
  background: color-mix(in srgb, var(--blue) 12%, var(--surface));
  color: var(--blue);
  text-decoration: none;
}

.search-result strong {
  font-size: 12px;
}

.search-result span {
  color: var(--muted);
  font-size: 10px;
}

.toc a.active {
  position: relative;
  background: color-mix(in srgb, var(--blue) 15%, var(--surface));
  color: var(--blue);
  font-weight: 850;
  box-shadow: inset 3px 0 0 var(--blue);
}

.toc a.active::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--yellow);
  transform: translateY(-50%);
  box-shadow: 0 0 8px color-mix(in srgb, var(--yellow) 70%, transparent);
}


/* Final V5 search and navigation synchronization */
.search-results {
  display: grid;
  gap: 5px;
  max-height: 330px;
  margin: 8px 0 14px;
  padding: 6px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg);
}

.search-results[hidden] {
  display: none;
}

.search-result {
  display: grid;
  gap: 3px;
  padding: 9px 10px;
  border-radius: 8px;
  color: var(--text);
  line-height: 1.25;
}

.search-result:hover,
.search-result:focus-visible {
  color: var(--blue);
  background: color-mix(in srgb, var(--blue) 12%, var(--surface));
  text-decoration: none;
}

.search-result strong {
  font-size: 12px;
}

.search-result span {
  color: var(--muted);
  font-size: 10px;
}

.toc a.active {
  position: relative;
  color: var(--blue);
  font-weight: 850;
  background: color-mix(in srgb, var(--blue) 15%, var(--surface));
  box-shadow: inset 3px 0 0 var(--blue);
}

.toc a.active::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--yellow);
  transform: translateY(-50%);
}

#content h1,
#content h2,
#content h3,
#functions,
#working-with-data-in-python-file-handling,
#working-with-data-in-python-rest-apis-web-scraping-and-html-basics {
  scroll-margin-top: 104px;
}


/* Persistent guide search interface
   The search controls stay visible while only the table of contents scrolls. */
@media (min-width: 901px) {
  .sidebar {
    overflow: hidden;
  }

  .sidebar-inner {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 86px);
    max-height: calc(100vh - 86px);
    overflow: hidden;
  }

  .search-wrap,
  .sidebar-actions,
  .toc-title {
    flex: 0 0 auto;
  }

  .search-wrap {
    position: relative;
    z-index: 3;
    padding-bottom: 8px;
    background: var(--surface);
  }

  .sidebar-actions,
  .toc-title {
    position: relative;
    z-index: 2;
    background: var(--surface);
  }

  .toc {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
    padding-bottom: 24px;
  }

  .search-results {
    max-height: min(34vh, 300px);
  }
}

/* On smaller screens the open menu keeps the search control at the top. */
@media (max-width: 900px) {
  .sidebar-inner {
    display: flex;
    flex-direction: column;
    max-height: 100dvh;
    overflow: hidden;
  }

  .search-wrap,
  .sidebar-actions,
  .toc-title {
    flex: 0 0 auto;
    background: var(--surface);
  }

  .toc {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
}


/* Search UX refinement */
.search-control {
  position: relative;
}

.search-control input {
  padding-right: 72px;
}

.search-clear {
  position: absolute;
  right: 42px;
  top: 50%;
  width: 30px;
  height: 30px;
  display: none;
  place-items: center;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 22px;
  line-height: 1;
  transform: translateY(-50%);
  cursor: pointer;
}

.search-clear.visible {
  display: grid;
}

.search-clear:hover,
.search-clear:focus-visible {
  color: var(--text);
  background: color-mix(in srgb, var(--blue) 12%, var(--surface));
}

.search-result {
  min-height: 54px;
  border: 1px solid transparent;
}

.search-result[aria-selected="true"],
.search-result:hover,
.search-result:focus-visible {
  border-color: color-mix(in srgb, var(--blue) 45%, var(--line));
}

.search-result mark {
  padding: 0;
  color: inherit;
  background: color-mix(in srgb, var(--yellow) 45%, transparent);
  border-radius: 3px;
}

.search-result .result-context {
  display: flex;
  gap: 6px;
  align-items: center;
}

.search-result .result-level {
  flex: 0 0 auto;
  padding: 2px 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--blue) 12%, var(--surface));
  color: var(--blue);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.search-empty {
  padding: 12px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.mobile-search-button {
  display: none;
}

@media (max-width: 900px) {
  .mobile-search-button {
    position: fixed;
    right: 18px;
    bottom: 78px;
    z-index: 40;
    min-height: 44px;
    padding: 0 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 12px;
    font-weight: 800;
    box-shadow: 0 12px 30px rgba(0, 0, 0, .16);
    cursor: pointer;
  }

  .sidebar.open .search-wrap {
    position: sticky;
    top: 0;
    z-index: 6;
    padding-top: 8px;
  }

  .search-results {
    max-height: 42dvh;
  }
}

@media (max-width: 520px) {
  .search-wrap label {
    font-size: 15px;
  }

  .search-control input {
    min-height: 50px;
    font-size: 16px;
  }

  .search-result {
    min-height: 58px;
    padding: 11px 12px;
  }
}


/* Use only the custom clear-search button. */
#pageSearch::-webkit-search-cancel-button,
#pageSearch::-webkit-search-decoration,
#pageSearch::-webkit-search-results-button,
#pageSearch::-webkit-search-results-decoration {
  -webkit-appearance: none;
  appearance: none;
  display: none;
}

#pageSearch::-ms-clear,
#pageSearch::-ms-reveal {
  display: none;
  width: 0;
  height: 0;
}


/* Search filters replacing Expand/Collapse */
.search-filter-wrap {
  display: grid;
  gap: 9px;
  width: 100%;
}

.search-filter-label {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.search-filter-group {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px;
}

.search-filter {
  min-height: 36px;
  padding: 7px 6px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-size: 10px;
  font-weight: 800;
  cursor: pointer;
}

.search-filter:hover,
.search-filter:focus-visible {
  color: var(--text);
  border-color: color-mix(in srgb, var(--blue) 48%, var(--line));
}

.search-filter.active,
.search-filter[aria-pressed="true"] {
  color: var(--text);
  border-color: var(--blue);
  background: color-mix(in srgb, var(--blue) 14%, var(--surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--blue) 25%, transparent);
}

.title-only-option {
  display: flex;
  gap: 8px;
  align-items: center;
  min-height: 34px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
}

.title-only-option input {
  width: 16px;
  height: 16px;
  accent-color: var(--blue);
}

.sidebar-actions {
  align-items: stretch;
}

.sidebar-actions > button {
  min-height: 40px;
}

@media (max-width: 520px) {
  .search-filter-group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .search-filter {
    min-height: 42px;
    font-size: 11px;
  }

  .title-only-option {
    min-height: 42px;
    font-size: 11px;
  }
}


/* Simplified search controls: All, Subtopics, Print / PDF */
.search-filter-group {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.search-filter-wrap {
  gap: 7px;
}

@media (max-width: 520px) {
  .search-filter-group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}


/* Balanced search controls: All, Subtopics, Print / PDF */
.sidebar-actions {
  display: block;
}

.search-filter-wrap {
  width: 100%;
}

.search-filter-group {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  width: 100%;
}

.search-filter,
.print-filter-button {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 8px 10px;
  white-space: nowrap;
  text-align: center;
}

.print-filter-button {
  color: var(--text);
  background: var(--surface);
}

.print-filter-button:hover,
.print-filter-button:focus-visible {
  border-color: color-mix(in srgb, var(--blue) 48%, var(--line));
  background: color-mix(in srgb, var(--blue) 10%, var(--surface));
}

@media (max-width: 520px) {
  .search-filter-group {
    grid-template-columns: 1fr;
  }

  .search-filter,
  .print-filter-button {
    min-height: 46px;
  }
}