:root{
  --paper:#F4F6F7; --paper-2:#FFFFFF;
  --ink:#0C2027; --ink-2:#12303A;
  --body:#31474E; --muted:#63767D; --line:#DDE5E7;
  --teal:#0E7C8B; --teal-deep:#0A5A66; --cyan:#23B5C9; --amber:#DE8F38;
  --serif:Georgia,"Times New Roman",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --wrap:1140px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--body);
  font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{color:var(--ink);line-height:1.2;margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.eyebrow{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;font-weight:600;color:var(--teal)}

/* nav (a landinggel egységes) */
header.nav{position:sticky;top:0;z-index:20;background:rgba(12,32,39,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-family:var(--serif);font-size:1.35rem;color:#fff;font-weight:700;letter-spacing:-.01em}
.logo b{color:var(--cyan)}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{color:#b9ccd1;font-size:.95rem}
.nav-links a:hover{color:#fff;text-decoration:none}
.nav-cta{background:var(--teal);color:#fff!important;padding:.5em 1.1em;border-radius:7px;font-weight:600}
.nav-cta:hover{background:var(--teal-deep);text-decoration:none}
.lang{display:inline-flex;gap:4px;align-items:center;font-size:.85rem}
.lang a{color:#7d949b;padding:2px 5px;border-radius:4px}
.lang a.active{color:#fff;font-weight:700}
.lang span{color:#3a5560}
@media(max-width:760px){.nav-links a:not(.nav-cta):not(.lang a){display:none}.nav-links .lang{display:inline-flex}}

/* blog index */
.blog-hero{background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 100%);color:#dbe8eb;padding:64px 0 56px}
.blog-hero h1{color:#fff;font-family:var(--serif);font-size:clamp(2rem,4vw,3rem);margin:.4em 0 .3em}
.blog-hero p{color:#aec4ca;font-size:1.12rem;max-width:60ch}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:56px 0}
@media(max-width:860px){.post-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.post-grid{grid-template-columns:1fr}}
.post-card{display:flex;flex-direction:column;background:var(--paper-2);border:1px solid var(--line);
  border-radius:14px;padding:26px;transition:transform .12s ease,box-shadow .15s ease}
.post-card:hover{transform:translateY(-2px);box-shadow:0 18px 40px -24px rgba(0,0,0,.35);text-decoration:none}
.post-card .tag{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);font-weight:600}
.post-card h2{font-size:1.18rem;margin:12px 0 8px;color:var(--ink)}
.post-card p{font-size:.95rem;color:var(--muted);flex:1}
.post-card .more{margin-top:16px;color:var(--teal);font-weight:600;font-size:.92rem}

/* article */
.article{max-width:720px;margin:0 auto;padding:56px 24px 24px}
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:22px}
.crumbs a{color:var(--muted)}
.article h1{font-family:var(--serif);font-size:clamp(1.8rem,3.6vw,2.6rem);margin-bottom:14px}
.article .meta{color:var(--muted);font-size:.9rem;margin-bottom:8px}
.article .lead{font-size:1.18rem;color:var(--body);margin:22px 0 8px;line-height:1.55}
.article h2{font-size:1.4rem;margin:38px 0 12px}
.article h3{font-size:1.12rem;margin:26px 0 8px}
.article p{margin:14px 0}
.article ul,.article ol{margin:14px 0;padding-left:22px}
.article li{margin:7px 0}
.article strong{color:var(--ink)}
.article .callout{background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--teal);
  border-radius:10px;padding:18px 20px;margin:26px 0;font-size:.98rem}
.tldr{background:rgba(14,124,139,.06);border:1px solid rgba(14,124,139,.16);border-radius:12px;padding:20px 22px;margin:26px 0}
.tldr h3{margin:0 0 8px;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;color:var(--teal-deep)}
.tldr p{margin:0;font-size:.98rem}

/* CTA band + footer (landinggel egységes) */
.cta-band{background:linear-gradient(180deg,var(--ink-2),var(--ink));color:#fff;text-align:center;padding:64px 0;margin-top:56px}
.cta-band h2{color:#fff;font-family:var(--serif);font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:14px}
.cta-band p{color:#aec4ca;max-width:52ch;margin:0 auto 26px;font-size:1.08rem}
.btn{display:inline-flex;align-items:center;gap:.5em;font-weight:600;font-size:1rem;padding:.85em 1.5em;
  border-radius:8px;border:1px solid transparent;cursor:pointer;transition:transform .12s ease,background .15s ease}
.btn:hover{transform:translateY(-1px);text-decoration:none}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-deep)}
footer{background:var(--ink);color:#8ba1a7;padding:48px 0 36px}
footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
footer .logo{margin-bottom:12px}
footer p,footer a,footer li{color:#8ba1a7;font-size:.92rem}
footer h4{color:#cfdde1;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;margin:0 0 14px}
footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px}
footer a:hover{color:#fff}
.legal{border-top:1px solid rgba(255,255,255,.08);margin-top:36px;padding-top:20px;font-size:.84rem;color:#6d858b}
@media(max-width:760px){footer .wrap{grid-template-columns:1fr}}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px}