/* ============================================================
   PEAK Marketing. Blog
   Wspólny arkusz stylów (spójny z index.html)
   ============================================================ */

:root{
  --bg:#ffffff;
  --bg-soft:#f6f9fb;
  --bg-section:#f1f5f9;
  --ink:#0b1f2a;
  --ink-soft:#475569;
  --ink-muted:#64748b;
  --line:#e2e8f0;
  --teal:#0e7490;
  --teal-2:#14b8a6;
  --teal-3:#22d3ee;
  --teal-deep:#0a3d5b;
  --grad:linear-gradient(135deg, #22d3ee 0%, #0e7490 55%, #0a3d5b 100%);
  --grad-soft:linear-gradient(135deg, rgba(34,211,238,.10) 0%, rgba(14,116,144,.08) 100%);
  --shadow-sm:0 1px 2px rgba(11,31,42,.04), 0 1px 3px rgba(11,31,42,.04);
  --shadow-md:0 10px 30px -10px rgba(11,31,42,.15), 0 4px 12px -4px rgba(11,31,42,.08);
  --shadow-lg:0 30px 60px -20px rgba(10,61,91,.25), 0 12px 30px -10px rgba(10,61,91,.15);
  --radius:14px;
  --radius-lg:22px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:'Space Grotesk', 'Inter', sans-serif;letter-spacing:-0.02em;line-height:1.15;font-weight:700;color:var(--ink)}
h1{font-size:clamp(2.1rem, 4.4vw, 3.3rem);font-weight:800;letter-spacing:-0.03em}
h2{font-size:clamp(1.6rem, 3vw, 2.1rem);font-weight:700}
h3{font-size:1.3rem;font-weight:600}
p{color:var(--ink-soft);font-size:1.02rem}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}

.container{max-width:1200px;margin:0 auto;padding:0 24px}
.container-narrow{max-width:760px;margin:0 auto;padding:0 24px}

.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:inline-block}

/* ============ NAV ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  backdrop-filter:saturate(180%) blur(16px);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  background:rgba(255,255,255,.78);
  border-bottom:1px solid transparent;
  transition:all .25s ease;
}
.nav.scrolled{background:rgba(255,255,255,.92);border-bottom-color:var(--line);box-shadow:0 4px 16px rgba(11,31,42,.04)}
@media(max-width:880px){.nav{background:#fff;border-bottom:1px solid var(--line)}.nav.scrolled{background:#fff}}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:1280px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-family:'Inter', sans-serif;font-size:1.18rem;letter-spacing:-0.01em}
.brand-logo{width:42px;height:42px;flex-shrink:0;object-fit:contain;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-text small{font-size:.62rem;font-weight:500;letter-spacing:.18em;color:var(--ink-muted);margin-top:4px;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{font-size:.94rem;color:var(--ink-soft);font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--teal)}
.nav-links a.active{color:var(--teal);font-weight:600}
.nav-cta{display:inline-flex;align-items:center;gap:8px;background:var(--grad);color:#fff !important;padding:11px 20px;border-radius:999px;font-weight:600;font-size:.92rem;box-shadow:0 6px 20px -6px rgba(14,116,144,.5);transition:transform .15s ease, box-shadow .2s ease}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 10px 30px -8px rgba(14,116,144,.6)}
.menu-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.25s}

@media(max-width:880px){
  .nav-links{position:fixed;top:68px;left:0;right:0;z-index:-1;flex-direction:column;align-items:flex-start;gap:0;padding:8px 24px 24px;background:#fff;border-bottom:1px solid var(--line);transform:translateY(calc(-100% - 72px));transition:transform .25s ease}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:16px 0;width:100%;border-bottom:1px solid var(--line);font-size:1rem}
  .nav-links .nav-cta{margin-top:14px;align-self:stretch;justify-content:center;width:100%;color:#fff !important}
  .menu-toggle{display:block}
}

/* ============ SHARED BITS ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(14,116,144,.08);color:var(--teal-deep);
  border:1px solid rgba(14,116,144,.18);
  padding:7px 14px;border-radius:999px;
  font-size:.82rem;font-weight:600;letter-spacing:.02em;margin-bottom:24px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--teal-2);box-shadow:0 0 0 4px rgba(20,184,166,.18);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(20,184,166,.18)}50%{box-shadow:0 0 0 8px rgba(20,184,166,.06)}}

.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 26px;border-radius:999px;font-weight:600;font-size:.98rem;cursor:pointer;border:0;transition:transform .15s, box-shadow .2s, background .2s}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px -10px rgba(14,116,144,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px rgba(14,116,144,.65)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn .arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(3px)}

/* ============ BLOG HERO ============ */
.blog-hero{
  position:relative;padding:140px 0 56px;overflow:hidden;
  background:
    radial-gradient(800px 500px at 80% -10%, rgba(34,211,238,.18), transparent 60%),
    radial-gradient(700px 500px at -10% 30%, rgba(14,116,144,.12), transparent 60%),
    linear-gradient(180deg, #ffffff 0%, #f6fbfd 100%);
}
.blog-hero .container{position:relative}
.blog-hero h1{max-width:760px}
.blog-hero p{font-size:1.18rem;color:var(--ink-soft);max-width:620px;margin-top:20px}

/* ============ POST GRID (lista) ============ */
.post-section{padding:56px 0 90px}
.post-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
@media(max-width:820px){.post-grid{grid-template-columns:1fr}}
.post-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px 28px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  height:100%;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(14,116,144,.35)}
.post-card .tag{display:inline-flex;align-self:flex-start;align-items:center;gap:6px;font-size:.74rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--teal);background:var(--grad-soft);padding:5px 12px;border-radius:999px;margin-bottom:16px}
.post-card h2{font-size:1.32rem;line-height:1.3;margin-bottom:12px}
.post-card h2 a{transition:color .2s}
.post-card:hover h2 a{color:var(--teal-deep)}
.post-card p{font-size:.97rem;color:var(--ink-soft);flex:1}
.post-card .read{display:inline-flex;align-items:center;gap:8px;margin-top:20px;font-weight:600;font-size:.92rem;color:var(--teal)}
.post-card .read svg{width:16px;height:16px;transition:transform .2s}
.post-card:hover .read svg{transform:translateX(4px)}
.post-meta{display:flex;align-items:center;gap:14px;margin-top:16px;font-size:.82rem;color:var(--ink-muted)}
.post-meta span{display:inline-flex;align-items:center;gap:6px}
.post-meta svg{width:14px;height:14px;color:var(--teal-2)}

/* ============ ARTICLE ============ */
.article-head{
  position:relative;padding:128px 0 40px;overflow:hidden;
  background:linear-gradient(180deg, #f6fbfd 0%, #ffffff 100%);
  border-bottom:1px solid var(--line);
}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.85rem;color:var(--ink-muted);margin-bottom:22px}
.breadcrumb a{color:var(--ink-muted);transition:color .2s}
.breadcrumb a:hover{color:var(--teal)}
.breadcrumb .sep{color:var(--line)}
.article-head h1{font-size:clamp(1.9rem, 3.8vw, 2.9rem);max-width:780px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:22px;font-size:.88rem;color:var(--ink-muted)}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta svg{width:15px;height:15px;color:var(--teal-2)}

.article-body{padding:48px 0 72px}
.prose{max-width:760px;margin:0 auto}
.prose .lead{font-size:1.18rem;color:var(--ink);font-weight:500;line-height:1.6;margin-bottom:30px}
.prose h2{font-size:1.6rem;margin:42px 0 16px;scroll-margin-top:90px}
.prose h3{font-size:1.2rem;margin:30px 0 12px}
.prose p{margin-bottom:18px;line-height:1.75;color:var(--ink-soft)}
.prose ul,.prose ol{margin:0 0 20px 0;padding-left:4px;list-style:none;display:flex;flex-direction:column;gap:12px}
.prose ul li{position:relative;padding-left:32px;color:var(--ink-soft);line-height:1.65}
.prose ul li::before{
  content:"";position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:50%;
  background:var(--grad-soft);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%230e7490' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:center;
}
.prose ol{counter-reset:step;padding-left:0}
.prose ol li{position:relative;padding-left:42px;color:var(--ink-soft);line-height:1.65;counter-increment:step}
.prose ol li::before{
  content:counter(step);position:absolute;left:0;top:-2px;width:28px;height:28px;border-radius:8px;
  background:var(--grad);color:#fff;font-weight:700;font-size:.85rem;
  display:flex;align-items:center;justify-content:center;font-family:'Space Grotesk', sans-serif;
}
.prose strong{color:var(--ink);font-weight:600}
.prose a{color:var(--teal);text-decoration:underline;text-underline-offset:2px;font-weight:500}
.prose a:hover{color:var(--teal-deep)}

.callout{
  background:var(--grad-soft);border:1px solid rgba(14,116,144,.18);
  border-left:4px solid var(--teal);border-radius:12px;
  padding:20px 24px;margin:28px 0;
}
.callout strong{color:var(--ink)}
.callout p{margin:0;color:var(--ink-soft)}

.key-takeaways{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 28px;margin:30px 0;
}
.key-takeaways h3{font-size:.82rem;text-transform:uppercase;letter-spacing:.1em;color:var(--teal);margin-bottom:14px;font-weight:700}

/* ============ ARTICLE FAQ ============ */
.article-faq{max-width:760px;margin:48px auto 0}
.article-faq h2{font-size:1.6rem;margin-bottom:20px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;transition:border-color .2s, box-shadow .2s}
.faq-item.open{border-color:rgba(14,116,144,.35);box-shadow:var(--shadow-md)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;cursor:pointer;font-weight:600;font-size:1rem;color:var(--ink)}
.faq-q .plus{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--grad-soft);color:var(--teal);display:flex;align-items:center;justify-content:center;transition:transform .25s}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 22px}
.faq-a p{padding:0 0 20px;color:var(--ink-soft);font-size:.97rem;line-height:1.7}

/* ============ CTA INLINE (śródtekstowy) ============ */
.cta-inline{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:var(--grad-soft);
  border:1px solid rgba(14,116,144,.18);
  border-left:4px solid var(--teal);
  border-radius:14px;
  padding:22px 26px;margin:34px 0;
}
.cta-inline .cta-inline__txt{flex:1;min-width:220px}
.cta-inline strong{display:block;color:var(--ink);font-family:'Inter', sans-serif;font-weight:700;font-size:1.05rem;margin-bottom:4px}
.cta-inline span{color:var(--ink-soft);font-size:.94rem}
.cta-inline .btn{padding:12px 22px;font-size:.92rem;white-space:nowrap}
@media(max-width:560px){.cta-inline .btn{width:100%;justify-content:center}}

/* ============ CTA BOX ============ */
.cta-box{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg, #0a3d5b, #0e7490);
  border-radius:var(--radius-lg);
  padding:48px 44px;margin:56px auto 0;max-width:760px;
  text-align:center;color:#fff;box-shadow:var(--shadow-lg);
}
.cta-box::before{content:"";position:absolute;top:-40%;right:-10%;width:380px;height:380px;background:radial-gradient(circle, rgba(34,211,238,.35), transparent 70%);pointer-events:none}
.cta-box h2{color:#fff;font-size:1.7rem;position:relative}
.cta-box p{color:rgba(255,255,255,.85);max-width:520px;margin:14px auto 26px;position:relative}
.cta-box .btn-primary{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.85);box-shadow:none;position:relative}
.cta-box .btn-primary:hover{background:#fff;color:var(--teal-deep);transform:translateY(-2px);box-shadow:0 18px 40px -12px rgba(0,0,0,.4)}

/* ============ NEXT POSTS ============ */
.related{padding:0 0 90px}
.related-head{max-width:760px;margin:0 auto 24px}
.related-head h2{font-size:1.5rem}
.related-grid{max-width:760px;margin:0 auto;display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media(max-width:680px){.related-grid{grid-template-columns:1fr}}
.related-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:transform .2s, box-shadow .2s, border-color .2s}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,116,144,.35)}
.related-card .tag{font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--teal)}
.related-card h3{font-size:1.05rem;line-height:1.35;margin-top:8px}

/* ============ FOOTER ============ */
footer{padding:48px 0 32px;background:#0b1f2a;color:rgba(255,255,255,.7)}
.foot-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px}
@media(max-width:780px){.foot-inner{grid-template-columns:1fr;gap:24px}}
footer .brand{color:#fff}
footer .brand-text small{color:rgba(255,255,255,.5)}
footer h5{color:#fff;font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;margin-bottom:14px}
footer ul{list-style:none;display:flex;flex-direction:column;gap:10px}
footer ul a{color:rgba(255,255,255,.65);font-size:.94rem;transition:color .2s}
footer ul a:hover{color:var(--teal-3)}
footer p{color:rgba(255,255,255,.55);font-size:.92rem;line-height:1.7;margin-top:14px}
.foot-bottom{margin-top:36px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;color:rgba(255,255,255,.45);font-size:.84rem}
.foot-bottom a{color:inherit}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease, transform .7s ease}
.reveal.visible{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}