:root{
  --bg:#fbfcff; --card:#ffffff; --ink:#141b2e; --muted:#66708a; --line:#e8edf7;
  --g1:#6366f1; --g2:#06b6d4; --g3:#8b5cf6; --accent:#4f46e5;
  --radius:18px; --maxw:1100px; --readw:760px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* topbar */
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.topbar-in{max-width:var(--maxw);margin:0 auto;padding:0 22px;height:64px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-orb{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;color:#fff;font-size:14px;
  background:linear-gradient(135deg,var(--g1),var(--g2) 60%,var(--g3));box-shadow:0 6px 16px rgba(79,70,229,.32)}
.brand-tag{color:var(--muted);font-size:13px;margin-left:auto}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 380px at 82% -30%, rgba(99,102,241,.16), transparent 60%),
    radial-gradient(700px 340px at 4% -10%, rgba(6,182,212,.15), transparent 55%),
    linear-gradient(180deg,#ffffff,var(--bg))}
.hero-in{max-width:var(--maxw);margin:0 auto;padding:58px 22px 48px}
.hero-badge{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:7px 14px;font-size:13px;font-weight:600;color:var(--accent);box-shadow:0 3px 12px rgba(79,70,229,.08)}
.hero h1{font-size:47px;line-height:1.07;margin:16px 0 14px;letter-spacing:-1.2px;font-weight:800;max-width:700px}
.grad{background:linear-gradient(100deg,var(--g1),var(--g2) 55%,var(--g3));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);font-size:18px;max-width:560px;margin:0}

/* список */
.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:20px;padding:40px 0 54px}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px 18px;box-shadow:0 1px 2px rgba(20,27,46,.04);
  transition:transform .18s ease,box-shadow .25s ease,border-color .2s;
  opacity:0;transform:translateY(14px);animation:rise .5s ease forwards;animation-delay:calc(var(--i,0)*70ms)}
@keyframes rise{to{opacity:1;transform:none}}
.card:hover{text-decoration:none;transform:translateY(-6px);border-color:transparent;
  box-shadow:0 20px 42px rgba(79,70,229,.16)}
.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.card-ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:24px;
  background:linear-gradient(135deg,rgba(99,102,241,.15),rgba(6,182,212,.15))}
.chip{font-size:12px;font-weight:700;color:var(--accent);background:rgba(79,70,229,.09);padding:5px 11px;border-radius:999px}
.card-title{font-size:19px;font-weight:700;line-height:1.3;margin:0 0 8px;color:var(--ink)}
.card-desc{color:var(--muted);font-size:14.5px;margin:0 0 16px;flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;font-size:13px}
.card-date{color:var(--muted)}
.card-arrow{color:var(--accent);font-weight:700}

/* статья */
.article{max-width:var(--readw);margin:0 auto;padding:30px 0 52px}
.crumb{color:var(--muted);font-size:13px;margin-bottom:16px}
.crumb span{color:#42506a}
.art-meta{display:flex;align-items:center;gap:13px;margin-bottom:12px}
.art-ic{width:54px;height:54px;border-radius:15px;display:grid;place-items:center;font-size:27px;flex-shrink:0;
  background:linear-gradient(135deg,rgba(99,102,241,.16),rgba(6,182,212,.16))}
.article h1{font-size:34px;line-height:1.15;margin:4px 0 8px;letter-spacing:-.6px;font-weight:800}
.art-date{color:var(--muted);font-size:13px;margin-bottom:28px}
.art-body{font-size:17.5px;line-height:1.78;color:#2b3650}
.art-body h2{font-size:23px;font-weight:700;margin:34px 0 10px;color:var(--ink);letter-spacing:-.3px}
.art-body p{margin:0 0 17px}
.art-body ul{margin:0 0 17px;padding:0;list-style:none}
.art-body li{position:relative;padding:6px 0 6px 28px}
.art-body li:before{content:"";position:absolute;left:4px;top:13px;width:9px;height:9px;border-radius:50%;
  background:linear-gradient(135deg,var(--g1),var(--g2))}
.art-body strong{color:var(--ink);font-weight:600}
.art-body em{font-style:normal;color:var(--accent);font-weight:500}

/* рекомендация */
.reco{display:flex;align-items:center;gap:18px;flex-wrap:wrap;border-radius:var(--radius);padding:24px;margin:36px 0 22px;
  background:linear-gradient(120deg,rgba(99,102,241,.10),rgba(6,182,212,.10));border:1px solid rgba(99,102,241,.18)}
.reco-ic{font-size:30px;line-height:1}
.reco-text{flex:1;min-width:220px;font-size:15.5px;color:#39435e}
.reco-btn{background:linear-gradient(135deg,var(--g1),var(--g2));color:#fff;font-weight:700;
  padding:12px 20px;border-radius:12px;white-space:nowrap;box-shadow:0 8px 22px rgba(79,70,229,.28)}
.reco-btn:hover{text-decoration:none;transform:translateY(-1px)}
.back{display:inline-block;color:var(--muted);font-weight:600;margin-top:6px}

/* footer */
.foot{border-top:1px solid var(--line);margin-top:22px;background:#fff}
.foot-in{max-width:var(--maxw);margin:0 auto;padding:0 22px;min-height:66px;display:flex;align-items:center;
  justify-content:space-between;gap:12px;color:var(--muted);font-size:13.5px;flex-wrap:wrap}

@media (max-width:620px){
  .hero h1{font-size:33px}
  .hero p{font-size:16px}
  .article h1{font-size:26px}
  .art-body{font-size:16.5px}
  .brand-tag{display:none}
  .reco{flex-direction:column;align-items:stretch;text-align:center}
}