/* ============================================================
   LPG-Smart · База знаний (help-центр)
   Стиль сайта: тёмная тема по умолчанию, светлая через html.light
   (тема общая с сайтом: localStorage['theme']).
   Шрифты: Unbounded (дисплей) + Mulish (текст).
   ============================================================ */
:root{
  --bg:#0a0a0f; --dark:#111118; --surface:#16161f; --surface-2:#1c1c27;
  --line:rgba(255,255,255,.07); --line-2:rgba(255,255,255,.12);
  --ink:#f0f0f5; --ink-soft:#c2c2d0; --muted:#6b6b80;
  --brand:#7c5cfc; --brand-2:#c084fc; --teal:#2dd4bf; --gold:#f59e0b;
  --glow:rgba(124,92,252,.25); --brand-tint:rgba(124,92,252,.12); --teal-tint:rgba(45,212,191,.10);
  --nav-bg:rgba(10,10,15,.8); --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 16px 36px rgba(0,0,0,.3);
  --hh:57px;
  --font-disp:"Unbounded",system-ui,sans-serif; --font-body:"Mulish",system-ui,-apple-system,sans-serif;
}
html.light{
  --bg:#f5f5fa; --dark:#eeeef5; --surface:#fff; --surface-2:#f2f2f8;
  --line:rgba(0,0,0,.08); --line-2:rgba(0,0,0,.14);
  --ink:#0a0a0f; --ink-soft:#34343f; --muted:#6b6b80;
  --brand:#7c5cfc; --brand-2:#6a3fd4; --teal:#0d9488; --gold:#d97706;
  --glow:rgba(124,92,252,.15); --brand-tint:rgba(124,92,252,.08); --teal-tint:rgba(13,148,136,.08);
  --nav-bg:rgba(245,245,250,.9); --shadow:0 1px 2px rgba(0,0,0,.05),0 14px 34px rgba(16,16,31,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:17px;line-height:1.7;
  -webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
a{color:var(--brand-2);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}

/* ---------- Шапка ---------- */
header{position:sticky;top:0;z-index:100;background:var(--nav-bg);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line)}
nav{max-width:80rem;margin:0 auto;display:flex;align-items:center;gap:1rem;padding:.75rem 1.6rem}
.brand{display:inline-flex;align-items:center;gap:.55rem}
.brand img{height:30px;border-radius:7px;display:block}
.brand .tag{font-family:var(--font-disp);font-size:.6rem;font-weight:600;text-transform:uppercase;
  letter-spacing:.16em;color:var(--brand-2);border:1px solid var(--line-2);border-radius:999px;padding:.18rem .5rem}
.sp{flex:1}
.nlinks{display:flex;align-items:center;gap:1.4rem}
.nlinks a{color:var(--muted);font-weight:600;font-size:.85rem}
.nlinks a:hover{color:var(--ink);text-decoration:none}
.toggle{cursor:pointer;position:relative;width:44px;height:25px;border-radius:999px;border:1px solid var(--line-2);
  background:var(--surface-2);flex:none}
.toggle::after{content:"";position:absolute;top:2px;left:2px;width:19px;height:19px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));transition:transform .25s}
html.light .toggle::after{transform:translateX(19px);background:linear-gradient(135deg,var(--gold),#fbbf24)}
.menu-btn{display:none;cursor:pointer;width:38px;height:38px;border-radius:9px;border:1px solid var(--line-2);
  background:var(--surface-2);color:var(--ink);font-size:1.1rem;align-items:center;justify-content:center}

/* ---------- Раскладка ---------- */
.layout{display:grid;grid-template-columns:288px 1fr;max-width:80rem;margin:0 auto;align-items:start}

/* ---------- Сайдбар ---------- */
.kb-sidebar{position:sticky;top:var(--hh);height:calc(100vh - var(--hh));overflow-y:auto;
  border-right:1px solid var(--line);padding:1.4rem 1rem 3rem}
.kb-search{width:100%;padding:.6rem .85rem;border-radius:10px;border:1px solid var(--line-2);
  background:var(--surface);color:var(--ink);font-family:var(--font-body);font-size:.9rem;margin-bottom:1.1rem}
.kb-search::placeholder{color:var(--muted)}
.kb-search:focus{outline:none;border-color:var(--brand)}
.kb-cat{margin-bottom:1.3rem}
.kb-cat-t{font-family:var(--font-disp);font-weight:600;font-size:.72rem;text-transform:uppercase;
  letter-spacing:.1em;color:var(--muted);padding:0 .6rem;margin-bottom:.5rem;display:flex;gap:.45rem;align-items:center}
.kb-nav{list-style:none;display:flex;flex-direction:column;gap:.1rem}
.kb-nav a,.kb-nav span.soon{display:flex;gap:.55rem;align-items:flex-start;padding:.44rem .6rem;border-radius:9px;
  font-size:.9rem;font-weight:500;line-height:1.35;color:var(--ink-soft);transition:background .15s,color .15s}
.kb-nav a:hover{background:var(--surface);color:var(--ink);text-decoration:none}
.kb-nav a.active{background:var(--brand-tint);color:var(--brand-2);font-weight:700}
.kb-nav a.active::before{content:"";position:absolute}
.kb-nav .em{flex:none;width:1.1rem;text-align:center}
.kb-nav span.soon{color:var(--muted);opacity:.6;cursor:default}
.kb-nav span.soon .tagsoon{margin-left:auto;font-size:.6rem;font-family:var(--font-disp);text-transform:uppercase;
  letter-spacing:.08em;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:.05rem .4rem}

/* ---------- Контент ---------- */
.kb-content{padding:2rem 2.6rem 4rem;max-width:52rem;min-width:0}
.crumbs{font-size:.8rem;color:var(--muted);margin-bottom:1rem;font-weight:600}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand-2)}
.crumbs .sep{opacity:.5;margin:0 .35rem}
.kb-content h1{font-family:var(--font-disp);font-weight:800;letter-spacing:-.02em;line-height:1.15;
  font-size:clamp(1.7rem,3.6vw,2.4rem);margin-bottom:.5rem}
.kb-updated{color:var(--muted);font-size:.82rem;font-weight:600;margin-bottom:1.8rem;
  padding-bottom:1.4rem;border-bottom:1px solid var(--line)}
.kb-body>*:first-child{margin-top:0}
.kb-body p{margin:1.05rem 0;color:var(--ink-soft)}
.kb-body .lead{font-size:1.12rem;color:var(--ink)}
.kb-body h2{font-family:var(--font-disp);font-weight:600;letter-spacing:-.01em;font-size:1.4rem;
  margin:2.2rem 0 .8rem;color:var(--ink);scroll-margin-top:5rem}
.kb-body h3{font-family:var(--font-disp);font-weight:600;font-size:1.12rem;margin:1.7rem 0 .5rem;color:var(--ink)}
.kb-body strong{color:var(--ink);font-weight:700}
.kb-body a{font-weight:600}
.kb-body ul,.kb-body ol{margin:1rem 0;padding-left:0}
.kb-body li{list-style:none;position:relative;padding-left:1.8rem;margin:.55rem 0;color:var(--ink-soft)}
.kb-body ul>li::before{content:"";position:absolute;left:.3rem;top:.72em;width:.5rem;height:.5rem;border-radius:2px;
  transform:rotate(45deg);background:linear-gradient(135deg,var(--brand),var(--teal))}
.kb-body ol{counter-reset:li}
.kb-body ol>li{counter-increment:li}
.kb-body ol>li::before{content:counter(li);position:absolute;left:0;top:.05em;width:1.4rem;height:1.4rem;
  border-radius:8px;background:var(--brand-tint);color:var(--brand-2);font-size:.78rem;font-weight:800;
  font-family:var(--font-disp);display:grid;place-items:center}
.kb-body code{background:var(--surface-2);border:1px solid var(--line);border-radius:6px;padding:.1rem .4rem;
  font-size:.9em;color:var(--brand-2);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.kb-body pre{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:1rem;overflow:auto;margin:1.2rem 0}
.kb-body pre code{background:none;border:none;padding:0;color:var(--ink-soft)}

/* скриншоты + плейсхолдеры */
.kb-body figure.shot{margin:1.5rem 0}
.shot img{border:1px solid var(--line-2);border-radius:12px;display:block}
.shot-ph{border:1.5px dashed var(--line-2);border-radius:12px;background:var(--surface);
  color:var(--muted);padding:2.4rem 1rem;text-align:center;font-weight:600;font-size:.92rem}
.kb-body figure.shot figcaption{color:var(--muted);font-size:.82rem;text-align:center;margin-top:.5rem}

/* врезки (admonition) */
.admonition{margin:1.5rem 0;padding:1rem 1.2rem;border-radius:var(--radius-sm);
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--brand)}
.admonition-title{font-family:var(--font-disp);font-weight:600;color:var(--ink);margin-bottom:.2rem;
  display:flex;align-items:center;gap:.45rem;font-size:.95rem}
.admonition p{margin:.3rem 0 0}
.admonition.tip{border-left-color:var(--teal)} .admonition.tip .admonition-title::before{content:"💡"}
.admonition.warning{border-left-color:var(--gold)} .admonition.warning .admonition-title::before{content:"⚠️"}
.admonition.note{border-left-color:var(--brand)} .admonition.note .admonition-title::before{content:"📌"}

/* переход к след/пред статье */
.kb-nextprev{display:flex;gap:1rem;margin-top:2.6rem;flex-wrap:wrap}
.kb-nextprev a{flex:1;min-width:220px;border:1px solid var(--line);border-radius:12px;padding:1rem 1.2rem;
  background:var(--surface);color:var(--ink);transition:border-color .2s,transform .15s}
.kb-nextprev a:hover{border-color:var(--brand);transform:translateY(-2px);text-decoration:none}
.kb-nextprev .k{font-size:.72rem;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.08em}
.kb-nextprev .t{font-family:var(--font-disp);font-weight:600;margin-top:.2rem;display:block}

/* блок поддержки */
.kb-support{margin-top:2.6rem;padding:1.5rem 1.6rem;border-radius:var(--radius);
  background:linear-gradient(135deg,var(--brand-tint),var(--teal-tint));border:1px solid var(--line-2)}
.kb-support h3{font-family:var(--font-disp);font-weight:600;font-size:1.1rem;margin-bottom:.3rem}
.kb-support p{color:var(--ink-soft);font-size:.92rem;margin-bottom:.9rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-disp);font-weight:600;font-size:.88rem;
  padding:.7rem 1.3rem;border-radius:999px;background:var(--brand);color:#fff;transition:background .2s,transform .15s}
.btn:hover{background:#6a4de8;transform:translateY(-1px);text-decoration:none}

/* ---------- Главная базы ---------- */
.kb-home{max-width:64rem;margin:0 auto;padding:3.4rem 1.6rem 4rem}
.kb-home .hero{text-align:center;margin-bottom:2.6rem}
.kb-home .eyebrow{font-family:var(--font-disp);font-weight:600;font-size:.72rem;text-transform:uppercase;
  letter-spacing:.16em;color:var(--brand-2)}
.kb-home h1{font-family:var(--font-disp);font-weight:800;letter-spacing:-.02em;
  font-size:clamp(2rem,5vw,3rem);margin:.8rem 0 .7rem}
.kb-home h1 .hl{background:linear-gradient(135deg,var(--brand-2),var(--teal));-webkit-background-clip:text;
  background-clip:text;-webkit-text-fill-color:transparent}
.kb-home .hero p{color:var(--ink-soft);font-size:1.1rem;max-width:44ch;margin:0 auto 1.6rem}
.home-search{max-width:30rem;margin:0 auto;width:100%;padding:.85rem 1.1rem;border-radius:12px;
  border:1px solid var(--line-2);background:var(--surface);color:var(--ink);font-size:1rem;font-family:var(--font-body)}
.home-search:focus{outline:none;border-color:var(--brand)}
.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem;margin-top:2.4rem}
.cat-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem 1.6rem}
.cat-card h2{font-family:var(--font-disp);font-weight:600;font-size:1.15rem;margin-bottom:.9rem;
  display:flex;align-items:center;gap:.55rem}
.cat-card ul{list-style:none;display:flex;flex-direction:column;gap:.5rem}
.cat-card li{display:flex;gap:.5rem;align-items:flex-start;font-size:.94rem}
.cat-card li .em{flex:none;width:1.1rem;text-align:center}
.cat-card a{color:var(--ink-soft);font-weight:500}
.cat-card a:hover{color:var(--brand-2)}
.cat-card .soon{color:var(--muted);opacity:.55;font-size:.94rem;display:flex;gap:.5rem}

/* ---------- Подвал ---------- */
footer{border-top:1px solid var(--line);background:var(--dark);padding:2.2rem 0;font-size:.88rem;color:var(--muted)}
.fin{max-width:80rem;margin:0 auto;padding:0 1.6rem;display:flex;flex-wrap:wrap;gap:1rem;align-items:center}
.fin a{color:var(--muted);font-weight:600}.fin a:hover{color:var(--ink)}
.fin .fsp{flex:1}
.feco a{color:var(--brand-2)}

/* ---------- Мобилка ---------- */
.kb-overlay{display:none}
@media(max-width:900px){
  .menu-btn{display:flex}
  .nlinks a.hide-sm{display:none}
  .layout{grid-template-columns:1fr}
  .kb-sidebar{position:fixed;top:0;left:0;bottom:0;width:300px;height:100vh;z-index:120;background:var(--bg);
    transform:translateX(-100%);transition:transform .25s ease;padding-top:1.4rem}
  .kb-sidebar.open{transform:translateX(0);box-shadow:0 0 60px rgba(0,0,0,.5)}
  .kb-overlay.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:110}
  .kb-content{padding:1.6rem 1.3rem 3rem}
  .cat-grid{grid-template-columns:1fr}
}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:6px}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* ---------- Популярное (featured) ---------- */
.kb-nav a .fire{margin-left:auto;font-size:.9rem;line-height:1}
.kb-featured{margin-bottom:2rem;padding:1.3rem 1.4rem;border-radius:var(--radius);
  background:linear-gradient(135deg,var(--brand-tint),var(--teal-tint));border:1px solid var(--line-2)}
.kb-featured-t{font-family:var(--font-disp);font-weight:700;color:var(--ink);font-size:1.05rem;margin-bottom:.9rem}
.pop-grid{display:grid;grid-template-columns:1fr;gap:.7rem}
.pop-card{display:flex;gap:.9rem;align-items:flex-start;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-sm);padding:1rem 1.1rem;
  transition:transform .15s,border-color .2s,box-shadow .2s}
.pop-card:hover{text-decoration:none;transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--shadow)}
.pop-em{font-size:1.4rem;line-height:1.2;flex:none}
.pop-txt{display:flex;flex-direction:column;gap:.15rem;min-width:0}
.pop-txt b{font-family:var(--font-disp);font-weight:600;color:var(--ink);font-size:1rem}
.pop-txt span{color:var(--muted);font-size:.88rem}
@media(min-width:560px){.pop-grid{grid-template-columns:1fr 1fr}}