:root{
  --bg:#f6f7fb; --panel:#ffffff; --text:#1d2433; --muted:#5e6a7d; --line:#d9e0ea;
  --accent:#4b6f9e; --accent2:#5f8a7b; --accent3:#9a7354; --codebg:#101827; --codetext:#e8eef8;
  --shadow:0 14px 34px rgba(28,39,60,.10); --radius:18px; --radius-sm:12px;
  --kw:#80b7ff; --str:#9fe2a1; --cm:#9ca9ba; --ann:#ffd36e; --num:#dda0ff; --type:#7dd3fc;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#10141c;--panel:#171d28;--text:#eef3fb;--muted:#a9b4c5;--line:#2c3545;--accent:#8fb6ea;--accent2:#8bc5b3;--accent3:#e0b28e;--shadow:0 14px 34px rgba(0,0,0,.35);}
}
html{scroll-behavior:smooth;} body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.68;}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}.wrap{display:grid;grid-template-columns:290px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;overflow:auto;padding:22px;border-right:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.78),rgba(255,255,255,.50));backdrop-filter:blur(10px)}
@media (prefers-color-scheme: dark){.sidebar{background:linear-gradient(180deg,rgba(23,29,40,.95),rgba(23,29,40,.72));}}
.brand{display:flex;gap:12px;align-items:center;margin-bottom:18px}.logo{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:var(--shadow)}.brand h1{font-size:1.0rem;margin:0;line-height:1.25}.brand small{color:var(--muted)}
.searchbox{display:flex;gap:6px;margin:14px 0 18px 0}.searchbox input{width:100%;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:12px;padding:10px 12px}.btn,.copy{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:12px;padding:9px 11px;cursor:pointer;box-shadow:0 5px 15px rgba(0,0,0,.04)}.btn:hover,.copy:hover{transform:translateY(-1px)}
.nav{display:flex;flex-direction:column;gap:6px}.nav a{padding:8px 10px;border-radius:12px;color:var(--text)}.nav a:hover,.nav a.active{background:rgba(75,111,158,.12);text-decoration:none}.nav .group{margin-top:14px;color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em}.content{min-width:0;padding:36px 48px 80px}.article{max-width:1120px;margin:0 auto}.hero{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(135deg,rgba(75,111,158,.16),rgba(95,138,123,.11)),var(--panel);padding:34px;box-shadow:var(--shadow);margin-bottom:28px}.hero h1{font-size:2.25rem;line-height:1.12;margin:.2em 0}.hero p{font-size:1.08rem;color:var(--muted);max-width:900px}.pillrow{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.pill{border:1px solid var(--line);background:rgba(255,255,255,.45);border-radius:999px;padding:6px 10px;color:var(--muted);font-size:.9rem}@media (prefers-color-scheme: dark){.pill{background:rgba(255,255,255,.05)}}
h2{font-size:1.72rem;margin:36px 0 10px;line-height:1.2} h3{font-size:1.24rem;margin:25px 0 8px} h4{font-size:1.02rem;margin:20px 0 6px}.lead{font-size:1.08rem;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:18px 0}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:0 8px 22px rgba(0,0,0,.05)}.card h3{margin-top:0}.kpi{font-size:1.8rem;font-weight:800;color:var(--accent)}.note,.warn,.ok{border:1px solid var(--line);border-left:6px solid var(--accent);background:var(--panel);border-radius:var(--radius-sm);padding:14px 16px;margin:18px 0}.warn{border-left-color:#b7791f}.ok{border-left-color:#2f8f6f}.tablewrap{overflow:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);margin:18px 0}table{border-collapse:collapse;width:100%;min-width:650px}th,td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}th{text-align:left;background:rgba(75,111,158,.10)}tr:last-child td{border-bottom:0}code{font-family:"JetBrains Mono","Cascadia Code","SFMono-Regular",Consolas,monospace}.codebox{position:relative;margin:18px 0;border-radius:var(--radius);background:var(--codebg);box-shadow:var(--shadow);overflow:hidden;border:1px solid rgba(255,255,255,.08)}.codecap{display:flex;align-items:center;justify-content:space-between;padding:8px 10px 8px 14px;color:#b9c7d9;background:rgba(255,255,255,.04);font-size:.86rem}.copy{font-size:0;line-height:1;padding:8px 10px;background:#182235;color:#d9e7f7}.copy::before{content:"⧉";font-size:14px}.codebox pre{margin:0;padding:16px 18px;overflow:auto;color:var(--codetext);font-size:.91rem;line-height:1.55}.kw{color:var(--kw);font-weight:650}.str{color:var(--str)}.cm{color:var(--cm);font-style:italic}.ann{color:var(--ann)}.num{color:var(--num)}.type{color:var(--type)}.k,.kd,.kn,.kp,.kr{color:var(--kw);font-weight:650}.kt,.nc,.nf{color:var(--type)}.s,.s1,.s2,.sa,.sb,.sc,.sd,.se,.sh,.si,.sx{color:var(--str)}.c,.c1,.cm,.cp{color:var(--cm);font-style:italic}.nd,.na{color:var(--ann)}.mi,.mf,.mh,.il{color:var(--num)}.o{color:#f0abfc}.nt{color:#7dd3fc}.nv{color:#fbbf24}.diagram{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:12px;margin:18px 0;box-shadow:0 8px 22px rgba(0,0,0,.04)}.diagram img{width:100%;max-height:440px;object-fit:contain}.caption{color:var(--muted);font-size:.92rem;margin-top:6px}.toc{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:18px 0}.toc ol{columns:2;column-gap:36px}.pagefooter{margin-top:52px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:.92rem}.breadcrumb{color:var(--muted);font-size:.95rem;margin-bottom:18px}.chapter-nav{display:flex;justify-content:space-between;gap:12px;margin-top:32px}.chapter-nav a{border:1px solid var(--line);border-radius:14px;padding:10px 12px;background:var(--panel)}mark.search-hit{background:#ffd86b;color:#222;border-radius:4px;padding:0 2px}.search-tools{display:none;gap:6px;margin:4px 0 14px}.search-tools.show{display:flex}.mobile-note{display:none}
@media(max-width:860px){.wrap{display:block}.sidebar{position:relative;height:auto}.content{padding:22px 16px 60px}.hero{padding:22px}.hero h1{font-size:1.72rem}.toc ol{columns:1}.mobile-note{display:block}.chapter-nav{flex-direction:column}.sidebar .nav{display:grid;grid-template-columns:1fr;}.searchbox,.search-tools{display:none!important}}
@media print{body{background:#fff;color:#1b1f29}.wrap{display:block}.sidebar{display:none}.content{padding:0}.article{max-width:none}.hero,.card,.toc,.note,.warn,.ok,.diagram,.codebox{box-shadow:none;break-inside:avoid}.chapter-nav,.searchbox,.copy,.btn,.search-tools{display:none!important}a{color:#1d4e89}h1,h2,h3{break-after:avoid}.codebox pre{white-space:pre-wrap}.pagebreak{break-before:page}.print-toc a::after{content:""}}

/* V2 additions */
details.deep{border:1px solid var(--line);background:var(--panel);border-radius:var(--radius);padding:12px 14px;margin:18px 0}
details.deep summary{cursor:pointer;font-weight:700;color:var(--accent)}
.tag{font-size:.8rem;border:1px solid var(--line);border-radius:999px;padding:3px 8px;color:var(--muted)}
.source-list li{margin-bottom:.6rem}
@page{size:A4;margin:17mm 14mm 18mm 14mm;@bottom-center{content:"Enterprise Java V3 - " counter(page);font-size:9pt;color:#667085}}
@media print{.print-toc a::after{content:"  " target-counter(attr(href), page);float:right}.toc ol{columns:1}.pagebreak{break-before:page}}

/* V3 additions */
.badgebar{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 20px}.badge{border:1px solid var(--line);border-radius:999px;padding:4px 9px;color:var(--muted);font-size:.82rem;background:var(--panel)}
.callout-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin:18px 0}.callout{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(180deg,rgba(75,111,158,.08),rgba(255,255,255,.02));padding:16px}
@page{size:A4;margin:17mm 14mm 18mm 14mm;@bottom-center{content:"Enterprise Java V3 - " counter(page);font-size:9pt;color:#667085}}