:root{
  --bg:#f6f7fb;--paper:#fff;--ink:#121826;--muted:#687082;--line:#e6e8ef;
  --blue:#1684ff;--purple:#7657ff;--pink:#ff2b82;--green:#2fac66;--orange:#ff9f1a;--red:#ef4444;
  --radius:24px;--shadow:0 24px 70px rgba(20,26,45,.14);--mono:"SF Mono","Menlo","Consolas",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","Inter","Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.55}
a{color:inherit}img{max-width:100%;display:block}.site{display:grid;grid-template-columns:300px 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:#0b1020;color:white;padding:26px 22px;overflow:auto;border-right:1px solid rgba(255,255,255,.08)}.brand{display:flex;gap:12px;align-items:center;margin-bottom:24px}.brand img{width:54px}.brand strong{font-size:15px;letter-spacing:.3px}.brand span{display:block;color:#aeb8d5;font-size:12px}.nav-title{font-size:11px;letter-spacing:2px;color:#7f8aad;text-transform:uppercase;margin:24px 0 10px}.nav a{display:block;padding:9px 12px;border-radius:12px;text-decoration:none;color:#cdd6f8;font-size:14px;margin:2px 0}.nav a:hover,.nav a.active{background:linear-gradient(90deg,rgba(118,87,255,.32),rgba(22,132,255,.18));color:white}.download{margin-top:24px;padding:14px;border-radius:18px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1)}.download a{display:block;text-align:center;background:white;color:#111827;text-decoration:none;padding:10px;border-radius:12px;font-weight:800}.content{padding:0}.hero-cover{min-height:100vh;background:radial-gradient(circle at 18% 12%,rgba(118,87,255,.48),transparent 28%),radial-gradient(circle at 82% 85%,rgba(19,200,255,.28),transparent 33%),linear-gradient(135deg,#080b19,#101832 55%,#080b19);color:white;display:flex;align-items:center;position:relative;overflow:hidden}.hero-cover:after{content:"";position:absolute;right:-18%;bottom:5%;width:75%;height:35%;border-radius:50%;border-top:1px solid rgba(80,190,255,.5);box-shadow:0 -12px 0 rgba(118,87,255,.16),0 -24px 0 rgba(255,43,130,.08);transform:rotate(-13deg)}.hero-inner{width:min(980px,86%);margin:0 auto;position:relative;z-index:2}.logo-big{width:360px;margin-bottom:70px}.eyebrow{font-size:13px;letter-spacing:3px;text-transform:uppercase;color:#c7d2fe;font-weight:800}.hero-cover h1{font-size:clamp(56px,9vw,116px);line-height:.9;letter-spacing:-5px;margin:18px 0 16px}.hero-cover h2{font-size:28px;font-weight:500;color:#dbeafe;margin:0 0 70px}.quote{font-size:26px;line-height:1.35;max-width:700px;color:#f8fafc}.cover-meta{margin-top:42px;display:flex;gap:22px;flex-wrap:wrap;color:#b7c4e5;font-size:13px}.section{max-width:1040px;margin:0 auto;padding:82px 50px}.chapter{position:relative;background:var(--paper);margin:40px auto;border-radius:34px;box-shadow:var(--shadow);overflow:hidden}.chapter-pad{padding:74px 74px}.num{font-size:13px;letter-spacing:2px;color:var(--purple);font-weight:900;text-transform:uppercase}.chapter h2{font-size:52px;line-height:1;letter-spacing:-2px;margin:10px 0 24px}.lead{font-size:22px;color:#394155;max-width:850px}.grid{display:grid;gap:22px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.card{background:white;border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:0 12px 35px rgba(20,26,45,.06)}.card h3{margin:10px 0 8px;font-size:22px}.icon{width:54px;height:54px;border-radius:18px;display:grid;place-items:center;color:white;font-size:28px;background:linear-gradient(135deg,var(--purple),var(--blue))}.icon.green{background:linear-gradient(135deg,#38b65f,#6ed080)}.icon.orange{background:linear-gradient(135deg,#ff9f1a,#ffbd4a)}.icon.pink{background:linear-gradient(135deg,#ff2b82,#ff657d)}.note,.tip,.warning{border-radius:24px;padding:22px 24px;margin:26px 0;border:1px solid}.tip{background:#eefbf4;border-color:#bce6cc}.warning{background:#fff7ed;border-color:#fed7aa}.note{background:#f4f2ff;border-color:#d9d2ff}.note strong,.tip strong,.warning strong{display:block;font-size:17px;margin-bottom:6px}.screen{background:#f8fafc;border:1px solid var(--line);border-radius:28px;padding:14px;box-shadow:0 20px 45px rgba(20,26,45,.10);margin:28px auto;width:fit-content;max-width:100%}.screen img{border-radius:18px;max-width:100%;height:auto}.caption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}.callouts{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px}.callout{padding:16px;border-radius:18px;background:#f8fafc;border:1px solid var(--line)}.badge{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:10px;background:var(--purple);color:white;font-weight:900;margin-right:8px}.steps{counter-reset:step}.step{display:grid;grid-template-columns:54px 1fr;gap:18px;padding:18px 0;border-bottom:1px solid var(--line)}.step:before{counter-increment:step;content:counter(step);width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--purple),var(--blue));color:white;display:grid;place-items:center;font-weight:900}.kbd{font-family:var(--mono);font-size:13px;background:#111827;color:white;border-radius:9px;padding:3px 7px}.toc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.toc-link{text-decoration:none;background:white;border:1px solid var(--line);border-radius:18px;padding:18px;display:flex;gap:14px;align-items:center}.toc-link b{color:var(--purple)}.mini{font-size:13px;color:var(--muted)}.footer-note{background:#0b1020;color:white;padding:70px 50px;text-align:center}.footer-note h2{font-size:44px}.table{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:white}.table th,.table td{text-align:left;padding:14px;border-bottom:1px solid var(--line);vertical-align:top}.table th{background:#f8fafc;color:#475569}.table tr:last-child td{border-bottom:0}.flow{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.pill{padding:10px 14px;border-radius:999px;background:#eef2ff;color:#3730a3;font-weight:800}.arrow{color:#94a3b8;font-size:22px}.toplink{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:14px;background:#111827;color:white;display:grid;place-items:center;text-decoration:none;box-shadow:var(--shadow);opacity:.92}
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin:28px 0}.gallery-item{background:#f8fafc;border:1px solid var(--line);border-radius:20px;padding:10px;box-shadow:0 14px 32px rgba(20,26,45,.08)}.gallery-item img{border-radius:12px}.gallery-cap{color:#475569;font-size:12.5px;line-height:1.45;padding:10px 6px 4px}.gallery-step{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:7px;background:linear-gradient(135deg,var(--purple),var(--blue));color:white;font-weight:900;font-size:11.5px;margin-right:7px}
.placeholder{border:1px dashed var(--line);border-radius:24px;padding:40px;text-align:center;background:#f8fafc;margin:26px 0}.placeholder .icon{margin:0 auto 14px}
.gallery-item img{cursor:zoom-in}
.lightbox{position:fixed;inset:0;background:rgba(5,7,15,.9);display:none;align-items:center;justify-content:center;z-index:9999;padding:5vh 5vw;cursor:zoom-out}
.lightbox.open{display:flex}
.lightbox img{max-width:92vw;max-height:92vh;border-radius:16px;box-shadow:0 30px 90px rgba(0,0,0,.55)}
.lightbox-close{position:absolute;top:22px;right:26px;width:44px;height:44px;border-radius:14px;background:rgba(255,255,255,.1);color:white;display:grid;place-items:center;font-size:20px}
.lightbox-nav{position:absolute;top:50%;transform:translateY(-50%);width:54px;height:54px;border-radius:16px;background:rgba(255,255,255,.1);color:white;display:grid;place-items:center;font-size:26px;cursor:pointer}
.lightbox-nav:hover{background:rgba(255,255,255,.2)}
.lightbox-nav.prev{left:26px}.lightbox-nav.next{right:26px}
.lightbox-count{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:#cdd6f8;font-size:13px;letter-spacing:.5px}@media(max-width:900px){.site{display:block}.sidebar{position:relative;height:auto}.hero-cover h1{font-size:56px}.chapter-pad,.section{padding:48px 24px}.grid.two,.grid.three,.toc-grid{grid-template-columns:1fr}.callouts{grid-template-columns:1fr}.logo-big{width:280px}.hero-cover{min-height:720px}}@media print{
@page{size:A4;margin:14mm}
*{-webkit-print-color-adjust:exact;print-color-adjust:exact}
.site{display:block}
.sidebar,.toplink,.lightbox{display:none!important}
.hero-cover{min-height:auto;height:auto;padding:38mm 0;page-break-after:always;break-after:page}
.section{max-width:none;padding:0 0 10mm;page-break-after:always;break-after:page}
.chapter{box-shadow:none;border-radius:0;margin:0;page-break-after:always;break-after:page}
.chapter-pad{padding:0 0 10mm}
.screen{box-shadow:none;break-inside:avoid;page-break-inside:avoid;margin:16px auto}
.gallery{display:grid;grid-template-columns:repeat(2,1fr)}
.gallery-item,.card,.callout,.step,.note,.tip,.warning,.placeholder,figure{break-inside:avoid;page-break-inside:avoid}
.table{break-inside:auto}
.table tr{break-inside:avoid;page-break-inside:avoid}
h2,h3,.num,.lead{break-after:avoid;page-break-after:avoid}
.footer-note{page-break-before:always;break-before:page}
body{background:white}
.nav{display:none}
}