:root{
  --blue:#0b84ff;
  --blueGlow:#1e90ff;
  --dark:#0b0f17;
  --card:#111827;
  --text:#e5e7eb;
  --gray:#94a3b8;
  --white:#ffffff;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Segoe UI',sans-serif;
  background:var(--dark);
  color:var(--text);
  line-height:1.6;
}
header{
  position:relative;
  padding:85px 20px 44px;
  background:#ffffff;
  border-bottom:1px solid #e5e7eb;
  text-align:center;
}
header h1{
  font-size:36px;
  color:var(--blue);
  margin-bottom:12px;
  text-shadow:0 0 10px rgba(30,144,255,.35);
}
header p{
  max-width:980px;
  margin:0 auto 18px;
  font-size:17px;
  color:#475569;
}
.top-actions{
  display:flex;
  gap:12px;
  justify-content:center;
  flex-wrap:wrap;
  margin-top:10px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 18px;
  border-radius:999px;
  text-decoration:none;
  font-weight:700;
  border:1px solid #e5e7eb;
  background:#ffffff;
  color:#0f172a;
  box-shadow:0 10px 25px rgba(0,0,0,.05);
  transition:.25s ease;
}
.btn:hover{
  transform:translateY(-2px);
  background:linear-gradient(145deg,#0b63ce,#1e90ff);
  color:#fff;
  box-shadow:0 15px 30px rgba(30,144,255,.25);
}
.hero-note{
  max-width:1100px;
  margin:34px auto 0;
  padding:0 20px;
}
.hero-box{
  background:linear-gradient(145deg,#0b0f17,#111827);
  border:1px solid rgba(148,163,184,.18);
  border-radius:20px;
  box-shadow:0 14px 40px rgba(0,0,0,.35);
  padding:26px;
}
.hero-box h2{
  font-size:24px;
  margin-bottom:8px;
}
.hero-box p{color:var(--gray)}
.blog-wrap{
  max-width:1100px;
  margin:28px auto 20px;
  padding:0 20px 50px;
}
.blog-card{
  background:linear-gradient(145deg,#0b0f17,#111827);
  border:1px solid rgba(148,163,184,.18);
  border-radius:20px;
  padding:24px;
  box-shadow:0 14px 40px rgba(0,0,0,.35);
}
.blog-title{
  font-size:28px;
  color:var(--text);
  margin-bottom:6px;
}
.blog-sub{
  color:var(--gray);
  font-size:15px;
  margin-bottom:18px;
}
.post-item{border-top:1px solid rgba(148,163,184,.18)}
.post-item:first-of-type{border-top:0}
.post-q{
  width:100%;
  text-align:left;
  background:transparent;
  border:0;
  color:var(--text);
  padding:20px 6px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}
.post-headline{display:flex;flex-direction:column;gap:6px}
.post-date{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#7dd3fc;font-weight:700}
.post-name{font-size:20px;font-weight:800}
.post-lead{font-size:14px;color:var(--gray);font-weight:500}
.post-icon{
  width:38px;height:38px;border-radius:999px;display:flex;align-items:center;justify-content:center;flex:0 0 auto;
  background:rgba(30,144,255,.12);border:1px solid rgba(30,144,255,.3);box-shadow:inset 0 0 18px rgba(30,144,255,.10);
}
.post-icon span{display:block;width:14px;height:14px;position:relative}
.post-icon span:before,.post-icon span:after{content:"";position:absolute;left:50%;top:50%;width:14px;height:2px;background:rgba(229,231,235,.95);transform:translate(-50%,-50%);border-radius:2px}
.post-icon span:after{width:2px;height:14px}
.post-item.open .post-icon span:after{height:0}
.post-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 6px}
.post-inner{padding:0 0 24px;color:var(--gray);font-size:15px;line-height:1.72}
.post-inner h3{color:#fff;margin:14px 0 8px;font-size:18px}
.post-inner p{margin:0 0 12px}
.post-inner ul{padding-left:20px;margin:0 0 12px}
.post-inner li{margin-bottom:8px}
.post-inner strong{color:#fff}
.post-inner a{color:#b9d8ff;text-decoration:underline;text-underline-offset:3px}
.post-item.open .post-a{max-height:1200px}
.cta-strip{
  max-width:1100px;margin:0 auto 40px;padding:0 20px;
}
.cta-box{
  background:#ffffff;border-radius:20px;padding:28px;box-shadow:0 15px 40px rgba(0,0,0,.08);text-align:center;
}
.cta-box h2{font-size:28px;color:#0f172a;margin-bottom:10px}
.cta-box p{color:#475569;max-width:850px;margin:0 auto 18px}
footer{
  text-align:center;
  padding:60px 20px;
  background:#ffffff;
  border-top:1px solid #e5e7eb;
  font-size:14px;
  color:#00050b;
}
footer strong{color:#1e293b}
@media(max-width:768px){
  header h1{font-size:28px}
  .post-name{font-size:18px}
  .cta-box h2{font-size:24px}
}

/* ===== PREMIUM 2026 ===== */
:root{
  --blue:#2f8cff;
  --blueGlow:#68b8ff;
  --dark:#070b12;
  --card:#101722;
  --text:#f4f7fb;
  --gray:#b8c4d6;
  --gold:#d8b76a;
  --line:rgba(216,183,106,.22);
}

body{
  background:
    radial-gradient(circle at 20% 0%, rgba(47,140,255,.22), transparent 34rem),
    radial-gradient(circle at 88% 10%, rgba(216,183,106,.14), transparent 30rem),
    linear-gradient(180deg,#07111f 0%,#05070b 56%,#0b1018 100%);
}

header{
  min-height:460px;
  padding:112px 24px 76px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  overflow:hidden;
  background:
    linear-gradient(105deg, rgba(5,10,18,.96) 0%, rgba(7,17,31,.92) 48%, rgba(7,17,31,.72) 100%),
    url("img/laboratorium_pomiarowe_hslba.png") right 8% center / min(39vw,480px) no-repeat,
    #07111f;
  border-bottom:1px solid var(--line);
}

header:before{
  content:"";
  position:absolute;
  inset:24px;
  border:1px solid rgba(255,255,255,.08);
  border-radius:8px;
  pointer-events:none;
}

header h1{
  max-width:1060px;
  font-size:clamp(32px,4.5vw,56px);
  line-height:1.08;
  color:#ffffff;
  text-shadow:0 18px 44px rgba(0,0,0,.45);
}

header h1:after{
  content:"";
  display:block;
  width:120px;
  height:2px;
  margin:22px auto 0;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
}

header p{
  max-width:900px;
  color:#d7e1ef;
}

.btn{
  border-radius:8px;
  border-color:rgba(216,183,106,.26);
  box-shadow:0 16px 36px rgba(0,0,0,.18);
}

.btn:hover{
  background:linear-gradient(145deg,#07111f,#0f2748);
  border-color:rgba(216,183,106,.55);
  box-shadow:0 18px 44px rgba(47,140,255,.22);
}

.hero-note,
.blog-wrap,
.cta-strip{
  max-width:1120px;
}

.hero-box,
.blog-card{
  border-radius:8px;
  background:linear-gradient(180deg,rgba(18,28,42,.96),rgba(7,12,20,.98));
  border:1px solid rgba(255,255,255,.08);
  box-shadow:0 28px 80px rgba(0,0,0,.38);
}

.hero-box{
  border-color:rgba(216,183,106,.2);
}

.hero-box h2,
.blog-title{
  color:#ffffff;
}

.blog-title{
  font-size:32px;
}

.hero-box p,
.blog-sub,
.post-lead,
.post-inner{
  color:#b8c4d6;
}

.post-item{
  border-color:rgba(216,183,106,.16);
}

.post-date{
  color:var(--gold);
}

.post-name{
  color:#ffffff;
}

.post-q:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:6px;
  border-radius:8px;
}

.post-icon{
  border-color:rgba(216,183,106,.34);
  background:rgba(216,183,106,.08);
}

.cta-box{
  border-radius:8px;
  border:1px solid rgba(7,17,31,.08);
  box-shadow:0 18px 55px rgba(7,17,31,.13);
}

footer{
  background:linear-gradient(180deg,#f8fafc,#edf3f9);
  color:#172033;
}

@media(max-width:900px){
  header{
    min-height:auto;
    padding:108px 20px 62px;
    background:
      linear-gradient(105deg, rgba(5,10,18,.96), rgba(7,17,31,.88)),
      url("img/laboratorium_pomiarowe_hslba.png") center bottom 16px / 300px no-repeat,
      #07111f;
  }
}