/* LinuxRu 2026 */
:root{--ink:#0f172a;--ink2:#334155;--mute:#64748b;--line:#e2e8f0;--bg:#f6f8fb;--paper:#fff;--blue:#1d4ed8;--blue2:#1e3a8a;--sun:#f5b301;--term:#0b1220;--term2:#111a2e;--ok:#16a34a;--r:14px;--mono:ui-monospace,"Cascadia Mono","JetBrains Mono","Fira Code",Consolas,"Liberation Mono",monospace}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;overflow-wrap:break-word}
img,video,iframe{max-width:100%}img{height:auto}
a{color:var(--blue);text-underline-offset:3px;text-decoration-thickness:1px}a:hover{color:var(--blue2)}
.w{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:40;background:#fff;padding:8px 12px;border-radius:8px}
/* header: dark terminal bar */
.hd{background:var(--term);color:#e2e8f0;position:sticky;top:0;z-index:30;border-bottom:3px solid var(--sun)}
.hd .w{display:flex;align-items:center;gap:18px;min-height:62px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;margin-right:auto;min-width:0}
.brand:hover{color:#fff}
.brand img{width:34px;height:34px;flex:none}
.brand b{font:800 21px/1 var(--mono);letter-spacing:-.02em}.brand b span{color:var(--sun)}
.brand small{display:block;font-size:12px;color:#94a3b8;line-height:1.3;margin-top:3px}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{padding:8px 12px;border-radius:8px;color:#cbd5e1;text-decoration:none;font-size:15px;font-weight:600}
.nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.nav a[aria-current]{background:var(--sun);color:var(--term)}
.menu{display:none;position:relative}
.menu summary{list-style:none;cursor:pointer;padding:9px 14px;border:1px solid #334155;border-radius:10px;font:700 14px var(--mono);min-height:44px;display:flex;align-items:center;color:#e2e8f0}
.menu summary::-webkit-details-marker{display:none}
main{padding:22px 0 56px}
.bc{font-size:14px;color:var(--mute);margin:0 0 14px;display:flex;flex-wrap:wrap;align-items:center}
.bc a{color:var(--mute)}.bc>span{margin:0 7px;opacity:.6}.bc .cur{color:var(--ink2)}
.grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:36px 44px}
h1{font-size:clamp(27px,3.5vw,38px);line-height:1.2;font-weight:800;margin:0 0 12px;letter-spacing:-.015em}
.art h2{font-size:clamp(22px,2.6vw,27px);line-height:1.28;font-weight:800;margin:40px 0 12px;scroll-margin-top:84px;letter-spacing:-.01em}
.art h2::before{content:"# ";font-family:var(--mono);color:var(--sun);font-weight:800}
.art h3{font-size:clamp(18.5px,2vw,21px);line-height:1.35;font-weight:700;margin:26px 0 8px}
.art p{margin:0 0 16px}
.art ul,.art ol{padding-left:24px;margin:0 0 18px}.art li{margin:6px 0}.art li::marker{color:var(--blue)}
.art code{font:0.9em var(--mono);background:#eef2ff;color:#1e3a8a;padding:2px 6px;border-radius:6px}
.art pre{position:relative;background:var(--term);color:#e2e8f0;border-radius:12px;padding:16px 18px;margin:18px 0 22px;overflow-x:auto;-webkit-overflow-scrolling:touch;font:14.5px/1.6 var(--mono);border-left:4px solid var(--sun)}
.art pre code{background:none;color:inherit;padding:0;font:inherit;white-space:pre}
.art figure{margin:24px 0}.art figure img{display:block;margin:0 auto;border-radius:10px;border:1px solid var(--line)}
.art figcaption{font-size:13.5px;color:var(--mute);text-align:center;margin-top:7px;line-height:1.45}
.cover{margin:4px 0 24px}.art .cover img{width:100%;max-height:460px;object-fit:contain;background:#f1f5f9}
.eyebrow{display:inline-block;font:700 12.5px var(--mono);letter-spacing:.04em;text-transform:uppercase;color:var(--blue2);background:#e0e7ff;padding:5px 10px;border-radius:6px;margin-bottom:10px}
.meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:14px;color:var(--mute);margin:0 0 20px}
.meta>*+*::before{content:"·";margin-right:14px;opacity:.6}
.meta a{color:var(--blue);text-decoration:none;font-weight:600}
.lead{font-size:clamp(17.5px,2vw,19.5px);color:var(--ink2);margin:0 0 20px}
.toc{margin:0 0 26px;border:1px solid var(--line);border-radius:12px;background:#f8fafc}
.toc summary{cursor:pointer;padding:12px 18px;font-weight:800;list-style:none;display:flex;justify-content:space-between;align-items:center;min-height:46px}
.toc summary::-webkit-details-marker{display:none}
.toc summary::after{content:"+";font:800 22px/1 var(--mono);color:var(--blue)}.toc[open] summary::after{content:"-"}
.toc ol{margin:0;padding:0 18px 16px 40px}.toc li{font-size:15px;margin:5px 0}
.tw{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:20px 0 24px;border:1px solid var(--line);border-radius:12px}
.tw table{width:100%;border-collapse:collapse;font-size:15px;background:#fff}
.tw th{background:var(--term2);color:#fff;text-align:left;padding:10px 13px;font-weight:700;vertical-align:top}
.tw td{padding:10px 13px;border-top:1px solid var(--line);vertical-align:top}
.tw tr:nth-child(even) td{background:#f8fafc}
.tw code{white-space:nowrap}
.note{background:#fffbeb;border:1px solid #fde68a;border-left:5px solid var(--sun);border-radius:12px;padding:15px 20px;margin:22px 0}
.note p:last-child{margin:0}
.faq details{border:1px solid var(--line);border-radius:12px;margin:0 0 10px;background:#fff}
.faq summary{cursor:pointer;padding:13px 18px;font-weight:700;min-height:46px}
.faq details>p{margin:0;padding:0 18px 15px;color:var(--ink2)}
.src{font-size:14.5px;color:var(--ink2);padding-left:20px}.src li{margin:5px 0}
.rel{margin:38px 0 0;padding:20px 22px;border-radius:12px;background:#f1f5f9}
.rel h2{margin:0 0 10px!important;font-size:20px!important}.rel h2::before{display:none}
.rel ul{margin:0;padding-left:20px}.rel li{margin:7px 0}
.disc{margin:28px 0 0;font-size:14.5px;color:var(--mute);border-top:1px solid var(--line);padding-top:14px}
.side{position:sticky;top:84px;display:grid;gap:16px}
.box{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px}
.box h2{font-size:16px;margin:0 0 10px;font-family:var(--mono)}
.box ul{list-style:none;padding:0;margin:0}
.box li{margin:0;font-size:15px;line-height:1.4;border-top:1px solid #f1f5f9}.box li:first-child{border-top:0}
.box li a{display:block;padding:8px 0;text-decoration:none;color:var(--ink2)}.box li a:hover,.box li a[aria-current]{color:var(--blue)}
.box.term{background:var(--term);color:#cbd5e1;border-color:var(--term);font:14px/1.6 var(--mono)}.box.term p{margin:0}.box.term b{color:var(--sun)}
/* home and lists */
.hero{background:var(--term);color:#e2e8f0;border-radius:18px;padding:46px 48px;margin:0 0 28px;position:relative;overflow:hidden}
.hero::after{content:"$ sudo apt update && sudo apt upgrade";position:absolute;right:28px;bottom:20px;font:14px var(--mono);color:#334155}
.hero h1{color:#fff;font-size:clamp(29px,4.4vw,46px);max-width:780px}.hero h1 span{color:var(--sun)}
.hero p{color:#cbd5e1;font-size:clamp(17px,2vw,19.5px);max-width:700px;margin:0 0 22px}
.btn{display:inline-flex;align-items:center;min-height:46px;background:var(--sun);color:var(--term)!important;text-decoration:none;font-weight:800;padding:10px 20px;border-radius:10px;margin:0 8px 8px 0}
.btn:hover{background:#ffc933}
.btn.ghost{background:transparent;color:#e2e8f0!important;border:1px solid #475569}
.sec h2{font-size:clamp(22px,2.8vw,29px);font-weight:800;margin:32px 0 6px}
.sec h2::before{content:"> ";font-family:var(--mono);color:var(--blue)}
.sec>p{color:var(--mute);margin:0 0 8px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin:16px 0}
.ac{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 18px 16px;text-decoration:none;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.ac:hover{border-color:var(--blue);box-shadow:0 10px 22px rgba(15,23,42,.07);color:var(--ink)}
.ac i{font:700 11.5px var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--blue);font-style:normal;margin-bottom:6px}
.ac b{font-size:16.5px;line-height:1.35;margin:0 0 6px}
.ac span{font-size:14.5px;color:var(--mute);line-height:1.5}
.ac img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:8px;margin:0 0 10px;background:#f1f5f9}
.list{list-style:none;padding:0;margin:14px 0;columns:2;column-gap:30px}
.list li{break-inside:avoid;margin:0 0 9px;font-size:15.5px;line-height:1.45;padding-left:16px;position:relative}
.list li::before{content:">";position:absolute;left:0;font:700 13px/1.7 var(--mono);color:var(--sun)}
.nf{text-align:center;max-width:640px;margin:20px auto}.nf .code{font:800 64px/1 var(--mono);color:var(--blue);margin:0 0 8px}
.ft{background:var(--term);color:#94a3b8;padding:36px 0 24px;font-size:15px;border-top:3px solid var(--sun)}
.ft a{color:#e2e8f0}.ft .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:28px}
.ft b{color:#fff;display:block;margin-bottom:10px;font-family:var(--mono)}
.ft nav a{display:block;padding:4px 0;text-decoration:none}.ft nav a:hover{color:var(--sun)}
.ft p{margin:0 0 10px}.ft .bot{border-top:1px solid #1e293b;margin-top:22px;padding-top:14px;font-size:13.5px}
@media (max-width:1040px){.grid{grid-template-columns:minmax(0,1fr)}.side{position:static}}
@media (max-width:860px){.hd .w>.nav{display:none}.menu{display:block}.menu .nav{position:absolute;right:0;top:54px;width:min(270px,calc(100vw - 28px));background:var(--term);border:1px solid #334155;border-radius:12px;padding:8px;flex-direction:column;box-shadow:0 18px 36px rgba(0,0,0,.35)}.menu .nav a{padding:11px 12px}}
@media (max-width:640px){body{font-size:16.5px}.w{padding:0 14px}.card{padding:22px 16px;border-radius:12px}.hero{padding:30px 20px}.hero::after{display:none}.ft .cols{grid-template-columns:1fr}.brand small{display:none}main{padding-top:14px}.list{columns:1}.art pre{font-size:13.5px;padding:14px;margin-left:-4px;margin-right:-4px}.tw table{font-size:14px}.tw th,.tw td{padding:8px 9px}}
@media (max-width:560px){.art .stk{border:0;overflow:visible}.art .stk thead{display:none}.art .stk table,.art .stk tbody{display:block}.art .stk tr{display:block;border:1px solid var(--line);border-radius:12px;margin:0 0 10px;padding:6px 0;background:#fff}.art .stk tr:nth-child(even) td{background:none}.art .stk td{display:grid;grid-template-columns:40% minmax(0,1fr);gap:10px;border:0;padding:5px 12px}.art .stk td::before{content:attr(data-label);font-weight:700;color:var(--blue2)}.art .stk code{white-space:normal}}
@media print{.hd,.ft,.side,.toc{display:none}.card{border:0;padding:0}}