/* NexaQR — style.css */
:root{
  --bg:#0f1220; --bg2:#171a2b; --card:#1c2033; --line:#2a2f47;
  --tx:#eef1f8; --mut:#a4acc4; --acc:#6c8cff; --acc2:#4fd1c5; --ok:#22c55e;
  --radius:14px; --max:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:linear-gradient(180deg,var(--bg),var(--bg2));color:var(--tx);line-height:1.65;
}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 18px}

/* header */
header.site{position:sticky;top:0;z-index:20;background:rgba(15,18,32,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 18px;max-width:var(--max);margin:0 auto;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.15rem;letter-spacing:.3px}
.brand b{color:var(--acc)}
.nav ul{display:flex;gap:16px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.nav a{color:var(--mut);font-size:.95rem}
.nav a:hover{color:var(--tx);text-decoration:none}

/* hero + generator */
.hero{padding:34px 0 10px;text-align:center}
h1{font-size:clamp(1.6rem,4vw,2.4rem);margin:.2em 0 .3em;line-height:1.2}
.lead{color:var(--mut);max-width:640px;margin:0 auto 6px;font-size:1.05rem}

.tool{display:grid;grid-template-columns:1fr 340px;gap:22px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:22px 0}
@media(max-width:760px){.tool{grid-template-columns:1fr}}
.field{margin-bottom:14px}
.field label{display:block;font-size:.85rem;color:var(--mut);margin-bottom:6px;font-weight:600}
input[type=text],textarea,select{width:100%;background:var(--bg2);border:1px solid var(--line);color:var(--tx);border-radius:10px;padding:11px 12px;font:inherit}
textarea{min-height:78px;resize:vertical}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row>div{flex:1;min-width:120px}
input[type=color]{width:100%;height:42px;background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:4px;cursor:pointer}
input[type=file]{font-size:.85rem;color:var(--mut)}
.btn{display:inline-block;background:var(--acc);color:#fff;border:0;border-radius:10px;padding:12px 18px;font-weight:700;cursor:pointer;font:inherit;font-weight:700}
.btn:hover{filter:brightness(1.08)}
.btn.sec{background:transparent;border:1px solid var(--line);color:var(--tx)}
.preview{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:var(--bg2);border:1px dashed var(--line);border-radius:12px;padding:18px}
#qr-canvas{background:#fff;border-radius:10px;max-width:100%;height:auto}
.hint{font-size:.8rem;color:var(--mut)}

/* content */
section.block{padding:26px 0;border-top:1px solid var(--line)}
h2{font-size:clamp(1.3rem,3vw,1.7rem);margin:.2em 0 .5em}
h3{margin:1.1em 0 .3em;font-size:1.1rem}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:760px){.grid3{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}
.card h3{margin-top:0;color:var(--acc2)}
ol.steps{padding-left:20px}
ol.steps li{margin:.4em 0}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:10px 0}
.faq summary{cursor:pointer;font-weight:600}
.muted{color:var(--mut)}

/* ad slots */
.ad-slot{margin:20px 0;min-height:90px;display:flex;align-items:center;justify-content:center;background:repeating-linear-gradient(45deg,var(--bg2),var(--bg2) 10px,var(--card) 10px,var(--card) 20px);border:1px dashed var(--line);border-radius:10px;color:var(--mut);font-size:.8rem;text-transform:uppercase;letter-spacing:1px}

/* article */
article.post{max-width:760px;margin:0 auto;padding:26px 0}
article.post h1{text-align:left}
article.post p,article.post li{color:#dfe3f0}
.breadcrumb{font-size:.85rem;color:var(--mut);margin:14px 0}
.toc{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin:16px 0}
.postlist{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
@media(max-width:640px){.postlist{grid-template-columns:1fr}}
.postlist a{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;color:var(--tx)}
.postlist a:hover{border-color:var(--acc);text-decoration:none}

/* footer */
footer.site{border-top:1px solid var(--line);margin-top:30px;padding:26px 0;color:var(--mut);font-size:.9rem}
footer.site .cols{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer.site a{color:var(--mut)}
footer.site ul{list-style:none;padding:0;margin:6px 0}

/* ===== animacje ===== */
@media (prefers-reduced-motion: no-preference){
  .hero,.tool,section.block{animation:fadeUp .55s ease both}
  .tool{animation-delay:.06s}
  #qr-canvas{animation:pop .3s ease}
}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes pop{from{transform:scale(.97);opacity:.6}to{transform:scale(1);opacity:1}}
.card{transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.card:hover{transform:translateY(-4px);border-color:var(--acc);box-shadow:0 12px 30px rgba(0,0,0,.28)}
.btn{transition:filter .15s ease,transform .1s ease}
.btn:hover{filter:brightness(1.08)}
.btn:active{transform:translateY(1px)}
.postlist a{transition:transform .18s ease,border-color .18s ease}
.postlist a:hover{transform:translateY(-3px)}

/* ===== uploader logo ===== */
.uploader{display:block;border:2px dashed var(--line);border-radius:12px;padding:16px;text-align:center;cursor:pointer;color:var(--mut);transition:border-color .15s ease,background .15s ease}
.uploader:hover{border-color:var(--acc);background:rgba(108,140,255,.06)}
.uploader.drag{border-color:var(--acc2);background:rgba(79,209,197,.12);color:var(--tx)}
.uploader input{display:none}
.uploader .up-ic{font-size:1.5rem;display:block;margin-bottom:4px}
.uploader b{color:var(--acc)}
.logo-preview{display:flex;align-items:center;gap:12px;margin-top:10px;background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.logo-preview img{width:46px;height:46px;object-fit:contain;background:#fff;border-radius:8px;padding:3px}
.logo-preview button{margin-left:auto;padding:7px 12px;font-size:.85rem}