:root {
  --dark-bg:#080c1a; --light-bg:#f0f4ff; --surface:#ffffff; --surface-2:#f8faff;
  --border:#e0e7ff; --border-2:#c7d2fe;
  --accent:#4f46e5; --accent-d:#3730a3; --accent-2:#818cf8;
  --violet:#7c3aed; --cyan:#0891b2; --pink:#db2777;
  --green:#10b981; --orange:#f59e0b; --red:#ef4444;
  --text:#0f172a; --text-2:#475569; --muted:#94a3b8;
  --max:1140px; --r:12px; --r-lg:20px;
  --shadow:0 4px 16px rgba(15,23,42,.08);
  --shadow-sm:0 1px 3px rgba(15,23,42,.06);
  --t-fast:150ms cubic-bezier(.4,0,.2,1);
  --t-base:280ms cubic-bezier(.4,0,.2,1);
  --t-slow:480ms cubic-bezier(.4,0,.2,1);
  --t-spring:500ms cubic-bezier(.34,1.56,.64,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--dark-bg);color:var(--text);font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:var(--accent);text-decoration:none;transition:color var(--t-fast)}
a:hover{color:var(--accent-d);text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ── HEADER ── */
header.site{position:sticky;top:0;z-index:200;background:rgba(8,12,26,.92);backdrop-filter:blur(16px) saturate(160%);border-bottom:1px solid rgba(255,255,255,.07);transition:background var(--t-base),border-color var(--t-base)}
.topbar{max-width:var(--max);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 24px;position:relative}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:15px;color:#fff;text-decoration:none;flex-shrink:0;transition:opacity var(--t-fast)}
.brand:hover{opacity:.85;text-decoration:none}
.brand .mono{font-family:"Roboto Mono",monospace;font-weight:600;color:var(--accent-2)}
.brand svg{transition:transform var(--t-spring)}
.brand:hover svg{transform:rotate(20deg) scale(1.1)}
nav.menu{display:flex;flex-wrap:wrap;gap:2px;align-items:center}
nav.menu a{display:inline-flex;align-items:center;padding:7px 14px;border-radius:8px;color:rgba(255,255,255,.7);font-size:14px;font-weight:500;white-space:nowrap;transition:background var(--t-fast),color var(--t-fast)}
nav.menu a:hover{background:rgba(255,255,255,.08);color:#fff}
nav.menu a.active{background:rgba(99,102,241,.2);color:var(--accent-2)}
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:8px;cursor:pointer;padding:0 11px;flex-shrink:0;transition:background var(--t-fast)}
.burger:hover{background:rgba(255,255,255,.14)}
.burger span{display:block;height:2px;background:#fff;border-radius:2px;transition:transform var(--t-base),opacity var(--t-base);transform-origin:center}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0;transform:scaleX(0)}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-nav{display:none;overflow:hidden;max-height:0;border-top:1px solid transparent;background:rgba(8,12,26,.97);transition:max-height var(--t-slow),border-color var(--t-base)}
.mobile-nav.open{max-height:600px;border-color:rgba(255,255,255,.08)}
.mobile-nav-list{list-style:none;padding:8px 0 4px;margin:0}
.mobile-nav-list li{border-bottom:1px solid rgba(255,255,255,.06)}
.mobile-nav-list li:last-child{border-bottom:none}
.mobile-nav-list a{display:block;padding:14px 24px;color:rgba(255,255,255,.8);font-size:15px;font-weight:500;text-decoration:none;transition:background var(--t-fast),color var(--t-fast),padding-left var(--t-base)}
.mobile-nav-list a:hover{background:rgba(255,255,255,.06);color:#fff;padding-left:30px;text-decoration:none}
.mobile-nav-list a.active{color:var(--accent-2);background:rgba(99,102,241,.12);font-weight:700}

/* ── BLOG HERO (dark) ── */
.blog-hero{background:var(--dark-bg);background-image:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(79,70,229,.35) 0%,transparent 60%),radial-gradient(ellipse 50% 40% at 80% 60%,rgba(99,102,241,.12) 0%,transparent 55%);padding:48px 0 100px;position:relative}
.hero-panel{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:24px;padding:36px 40px;position:relative;overflow:hidden;box-shadow:0 8px 40px rgba(0,0,0,.3)}
.hero-panel::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#4f46e5,#818cf8,#38bdf8)}
.hero-panel h1{font-size:clamp(26px,3.5vw,40px);font-weight:800;letter-spacing:-.03em;line-height:1.15;margin-bottom:12px;color:#ffffff}
.hero-panel h1 em{font-style:normal;background:linear-gradient(135deg,#a78bfa,#818cf8,#38bdf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-panel p{color:rgba(203,213,255,.6);font-size:clamp(14px,1.6vw,16px);max-width:72ch;line-height:1.7;margin:0}
.blog-hero-wave{position:relative;line-height:0;margin-bottom:-1px}
.blog-hero-wave svg{width:100%;height:80px;display:block}

/* ── BLOG BODY (light) ── */
.blog-body{background:var(--light-bg);}
.blog-layout{display:grid;grid-template-columns:1fr 300px;gap:20px;padding:28px 0 0;align-items:start}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:24px;overflow:hidden}

/* ── TOOLBAR ── */
.toolbar{padding:16px;display:grid;grid-template-columns:1fr auto auto;gap:10px;align-items:center}
.field{display:flex;gap:10px;align-items:center;border:1px solid var(--border);background:var(--surface-2);border-radius:12px;padding:10px 14px;min-height:46px;transition:border-color var(--t-base),box-shadow var(--t-base)}
.field:focus-within{border-color:var(--accent-2);box-shadow:0 0 0 3px rgba(79,70,229,.12)}
.field svg{flex:0 0 auto;opacity:.45;color:var(--muted)}
.field input,.field select{width:100%;border:0;outline:0;font:inherit;font-size:14px;background:transparent;color:var(--text)}
.field input::placeholder{color:var(--muted)}
.field select{cursor:pointer;color:var(--text-2)}
.field select option{background:var(--surface);color:var(--text)}
.toolbar-hint{padding:0 16px 14px;color:var(--muted);font-size:12px;line-height:1.5}

/* ── SECTION TITLES ── */
.section-title{display:flex;align-items:center;justify-content:space-between;padding:20px 20px 0;gap:10px}
.section-title h2{margin:0;font-size:15px;font-weight:700;letter-spacing:-.01em;color:var(--text)}
.section-title a{color:var(--muted);text-decoration:none;padding:7px 12px;border-radius:10px;border:1px solid transparent;font-size:13px;font-weight:500;transition:color var(--t-base),border-color var(--t-base),background var(--t-base)}
.section-title a:hover{color:var(--accent);border-color:var(--border-2);background:rgba(79,70,229,.05);text-decoration:none}

/* ── GRIDS ── */
.featured{padding:16px;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid{padding:16px;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}

/* ── CARD ── */
.card{overflow:hidden;border:1px solid var(--border);border-radius:20px;background:var(--surface);display:flex;flex-direction:column;min-height:100%;box-shadow:0 2px 8px rgba(79,70,229,.04);transition:transform var(--t-base),box-shadow var(--t-base),border-color var(--t-base)}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(79,70,229,.1);border-color:var(--border-2)}
.card.hidden{display:none}

/* ── COVER — Intercom-style light pastel gradients ── */
.cover{aspect-ratio:16/9;position:relative;overflow:hidden}
.cover.c1{background:linear-gradient(135deg,#eef2ff 0%,#ddd6fe 100%)}
.cover.c2{background:linear-gradient(135deg,#eff6ff 0%,#bfdbfe 100%)}
.cover.c3{background:linear-gradient(135deg,#f0fdf4 0%,#bbf7d0 100%)}
.cover.c4{background:linear-gradient(135deg,#fffbeb 0%,#fed7aa 100%)}
.cover.c5{background:linear-gradient(135deg,#ecfdf5 0%,#a7f3d0 100%)}
.cover.c6{background:linear-gradient(135deg,#fff1f2 0%,#fecdd3 100%)}
.cover.c7{background:linear-gradient(135deg,#f0f9ff 0%,#bae6fd 100%)}
.cover.c8{background:linear-gradient(135deg,#eef2ff 0%,#c7d2fe 100%)}

/* Grid pattern overlay */
.cover::before{content:"";position:absolute;inset:0;z-index:1;background-image:repeating-linear-gradient(0deg,transparent,transparent 28px,rgba(0,0,0,.03) 28px,rgba(0,0,0,.03) 29px),repeating-linear-gradient(90deg,transparent,transparent 28px,rgba(0,0,0,.03) 28px,rgba(0,0,0,.03) 29px)}

/* Photo cover overlay */
.cover[style*="background-image"]{background-size:cover!important;background-position:center!important}
.cover[style*="background-image"]::before{background:linear-gradient(to bottom,rgba(8,12,26,.15),rgba(8,12,26,.5))}

/* Accent line per card */
.cover.c1::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#4f46e5,#7c3aed);z-index:2}
.cover.c2::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#2563eb,#4f46e5);z-index:2}
.cover.c3::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#10b981,#059669);z-index:2}
.cover.c4::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#f59e0b,#f97316);z-index:2}
.cover.c5::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#10b981,#0891b2);z-index:2}
.cover.c6::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#f43f5e,#ec4899);z-index:2}
.cover.c7::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#0891b2,#4f46e5);z-index:2}
.cover.c8::after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#6366f1,#0891b2);z-index:2}

.badge{position:absolute;left:12px;top:12px;z-index:3;display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;background:rgba(15,23,42,.7);border:1px solid rgba(255,255,255,.15);font-size:11px;font-weight:700;color:#fff;backdrop-filter:blur(6px)}

/* ── CARD CONTENT ── */
.content{padding:16px 16px 14px;display:flex;flex-direction:column;gap:10px;flex:1}
.meta{display:flex;flex-wrap:wrap;gap:6px;color:var(--muted);font-size:12px;align-items:center}
.tag{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;border:1px solid rgba(79,70,229,.2);background:rgba(79,70,229,.06);color:var(--accent);font-size:11px;font-weight:500;text-decoration:none;transition:color var(--t-fast),border-color var(--t-base),background var(--t-base)}
.tag:hover{background:rgba(79,70,229,.12);color:var(--accent-d);border-color:var(--border-2);text-decoration:none}
.card h3{margin:0;font-size:15px;font-weight:700;line-height:1.3;letter-spacing:-.01em;color:var(--text)}
.card h3 a{color:var(--text);text-decoration:none;transition:color var(--t-fast)}
.card h3 a:hover{color:var(--accent);text-decoration:none}
.card p{margin:0;color:var(--text-2);font-size:13px;line-height:1.65}
.card .actions{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:10px;border-top:1px solid var(--border)}
.read{text-decoration:none;font-weight:700;font-size:13px;color:#fff;padding:8px 16px;border-radius:999px;border:none;background:var(--accent);box-shadow:0 2px 8px rgba(79,70,229,.25);transition:transform var(--t-spring),box-shadow var(--t-base),background var(--t-fast)}
.read:hover{background:var(--accent-d);transform:translateY(-1px);box-shadow:0 4px 14px rgba(79,70,229,.35);text-decoration:none}
.read-time{font-size:11px;color:var(--muted)}
.no-results{display:none;padding:40px 20px;text-align:center;color:var(--muted);font-size:15px}
.no-results.visible{display:block}

/* ── PAGINATION ── */
.pagination{display:flex;gap:8px;justify-content:center;padding:18px;border-top:1px solid var(--border)}
.page{text-decoration:none;padding:9px 14px;border-radius:10px;border:1px solid var(--border);background:var(--surface-2);color:var(--muted);min-width:42px;text-align:center;font-size:14px;transition:color var(--t-base),border-color var(--t-base),background var(--t-base),transform var(--t-spring)}
.page:hover{color:var(--accent);border-color:var(--border-2);background:rgba(79,70,229,.05);transform:translateY(-1px);text-decoration:none}
.page[aria-current="page"]{color:#fff;border-color:transparent;font-weight:700;background:var(--accent);box-shadow:0 2px 8px rgba(79,70,229,.3)}

/* ── SIDEBAR ── */
.sidebar{position:sticky;top:76px;display:flex;flex-direction:column;gap:14px}
.side-block{padding:18px}
.side-block h3{margin:0 0 12px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--accent)}
.side-list{display:flex;flex-direction:column;gap:6px}
.side-link{text-decoration:none;color:var(--text-2);font-size:13px;padding:9px 13px;border:1px solid var(--border);border-radius:12px;background:var(--surface);display:flex;align-items:center;justify-content:space-between;transition:color var(--t-base),border-color var(--t-base),background var(--t-base),transform var(--t-spring)}
.side-link:hover{color:var(--accent);border-color:var(--border-2);background:rgba(79,70,229,.04);transform:translateX(3px);text-decoration:none}
.side-link.active{color:var(--accent);border-color:var(--border-2);background:rgba(79,70,229,.06)}
.side-link--all{font-weight:600;color:var(--text)}
.count{font-size:11px;color:var(--muted);background:var(--surface-2);padding:2px 7px;border-radius:999px;border:1px solid var(--border)}
.subscribe{display:grid;gap:10px}
.btn{display:inline-flex;justify-content:center;align-items:center;padding:11px 16px;border-radius:999px;border:none;cursor:pointer;font:inherit;font-size:14px;font-weight:700;color:#fff;background:var(--accent);box-shadow:0 4px 16px rgba(79,70,229,.3);transition:background var(--t-fast),transform var(--t-spring),box-shadow var(--t-base)}
.btn:hover{background:var(--accent-d);transform:translateY(-2px);box-shadow:0 8px 24px rgba(79,70,229,.4)}
.cta-side{display:flex;align-items:center;gap:10px;padding:13px 14px;background:linear-gradient(135deg,rgba(79,70,229,.06),rgba(124,58,237,.04));border:1px solid rgba(79,70,229,.15);border-radius:var(--r);color:var(--text);text-decoration:none;font-size:13px;font-weight:600;transition:transform var(--t-spring),box-shadow var(--t-base),border-color var(--t-base)}
.cta-side:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(79,70,229,.12);border-color:rgba(79,70,229,.3);text-decoration:none}

/* ── FOOTER ── */
footer.foot{background:#080c1a;border-top:none;padding:64px 24px 48px;color:#94a3b8;font-size:14px}
.foot-grid{max-width:var(--max);margin:0 auto;display:flex;flex-wrap:wrap;gap:48px}
.foot-col{flex:1 1 180px}
.foot-col h4{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:#e2e8f0;font-weight:700;margin-bottom:14px}
.foot-col p{margin-bottom:8px;color:#64748b}
.foot-col ul{list-style:none}
.foot-col ul li{margin-bottom:10px}
.foot-col ul a{color:#64748b;transition:color var(--t-fast)}
.foot-col ul a:hover{color:#e2e8f0;text-decoration:none}
.foot-bottom{max-width:var(--max);margin:32px auto 0;padding-top:24px;border-top:1px solid rgba(255,255,255,.07);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:#475569}
.foot-bottom a{color:#475569;transition:color var(--t-fast)}
.foot-bottom a:hover{color:#e2e8f0}
#back-to-top{position:fixed;bottom:28px;right:24px;z-index:300;width:46px;height:46px;background:var(--accent);color:#fff;border:none;border-radius:var(--r);cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(79,70,229,.4);opacity:0;transform:translateY(16px) scale(.9);pointer-events:none;transition:opacity var(--t-base),transform var(--t-spring),background var(--t-fast)}
#back-to-top.visible{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}
#back-to-top:hover{background:var(--accent-d);transform:translateY(-2px) scale(1.05)}

/* ── REVEAL ── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity var(--t-slow),transform var(--t-slow)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-d1{transition-delay:80ms}.reveal-d2{transition-delay:160ms}.reveal-d3{transition-delay:240ms}

/* ── RESPONSIVE ── */
@media(max-width:860px){nav.menu{display:none}.burger{display:flex}.mobile-nav{display:block}}
@media(max-width:900px){.blog-layout{grid-template-columns:1fr}.sidebar{position:static}.toolbar{grid-template-columns:1fr}.featured{grid-template-columns:1fr}.grid{grid-template-columns:1fr}}
@media(max-width:600px){.container{padding:0 16px}.blog-hero{padding:32px 0 80px}.featured,.grid{padding:12px;gap:10px}footer.foot{padding:32px 16px}.foot-grid{gap:22px}.foot-bottom{flex-direction:column;text-align:center}#back-to-top{right:14px;bottom:16px}}

/* ── RESET FILTERS BUTTON ── */
.btn-reset {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface-2);
  color: var(--muted); font: inherit; font-size: 13px; font-weight: 500;
  cursor: pointer; white-space: nowrap;
  transition: background var(--t-fast), border-color var(--t-base),
              color var(--t-fast), transform var(--t-spring);
}
.btn-reset:hover {
  background: #fff0f0; border-color: #fca5a5; color: #ef4444;
  transform: translateY(-1px);
}
.btn-reset--active {
  background: #fef2f2; border-color: #fca5a5; color: #ef4444;
}
.btn-reset--active svg { stroke: #ef4444; }

/* Toolbar 4-column with reset btn */
.toolbar { grid-template-columns: 1fr auto auto; }

/* ── READABILITY — text in light sections ── */
.panel .card h3 a { color: #0f172a; }
.panel .card p { color: #374151; }
.panel .card .meta { color: #6b7280; }
.panel .card .read-time { color: #9ca3af; }
.hero-panel h1 { color: #ffffff; }
.hero-panel p { color: rgba(224,231,255,.75); }

/* ── LOGO ── */
.brand-logo {
  height: 40px;
  width: auto;
  display: block;
  filter: brightness(1.1);
}
.brand:hover .brand-logo { opacity: .85; }

/* Remove white space under blog footer */
.blog-body > main { margin-bottom: 0; padding-bottom: 0; }

/* ── LOGO POSITION LOCK — одинаково на всех страницах ── */
header.site .topbar { align-items: center !important; padding: 13px 24px !important; }
header.site .brand  { display: flex !important; align-items: center !important; flex-shrink: 0 !important; gap: 10px !important; }
header.site .brand-logo { height: 40px !important; width: auto !important; display: block !important; flex-shrink: 0 !important; }