/* Hub — opti-soft.tech — arkusz stylów wspólny dla wszystkich podstron */

:root{
  --bg:#0a1119;
  --bg-alt:#0e1620;
  --surface:#131e29;
  --surface-2:#1a2734;
  --border:#26374a;
  --text:#eef3f7;
  --muted:#93a5b6;
  --muted-2:#6b7d8e;
  --gold:#e0a23a;
  --gold-hover:#f2b559;
  --teal:#18b8cc;
  --navy-deep:#17222d;
  --radius:14px;
  --radius-sm:8px;
  --maxw:1160px;
  --shadow: 0 20px 60px -20px rgba(0,0,0,.6);
  --font-display: 'Space Grotesk', 'Arial Narrow', Arial, sans-serif;
  --font-body: 'IBM Plex Sans', 'Segoe UI', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

*, *::before, *::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *, *::before, *::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img,svg{ max-width:100%; display:block; }

a{ color:inherit; }

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.15;
  margin:0 0 .5em;
  text-wrap:balance;
  letter-spacing:-.01em;
}
h1{ font-size:clamp(2.1rem, 5vw, 3.4rem); font-weight:700; }
h2{ font-size:clamp(1.5rem, 3.2vw, 2.2rem); }
h3{ font-size:1.15rem; }
p{ margin:0 0 1em; color:var(--text); }
.lead{ font-size:1.15rem; color:var(--muted); max-width:60ch; }

.eyebrow{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--gold);
  display:inline-flex;
  align-items:center;
  gap:.5em;
  margin-bottom:1em;
}
.eyebrow::before{ content:''; width:18px; height:1px; background:var(--gold); display:inline-block; }

.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.section{ padding:88px 0; }
.section-tight{ padding:56px 0; }
.section-alt{ background:var(--bg-alt); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }

/* ---------- nav ---------- */
header.site{
  position:sticky; top:0; z-index:40;
  background:rgba(10,17,25,.82);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav{
  max-width:var(--maxw); margin:0 auto; padding:16px 24px;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family:var(--font-display); font-weight:700; font-size:1.3rem;
  text-decoration:none; color:var(--text);
}
.brand .mark{ width:30px; height:30px; flex:none; }
.brand .domain{ font-family:var(--font-mono); font-size:.68rem; color:var(--muted-2); font-weight:400; letter-spacing:.02em; }

nav.links{ display:flex; align-items:center; gap:8px; }
nav.links a{
  text-decoration:none; color:var(--muted); font-size:.95rem; font-weight:500;
  padding:9px 16px; border-radius:999px; transition:color .15s, background .15s;
}
nav.links a:hover{ color:var(--text); background:var(--surface-2); }
nav.links a.active{ color:var(--bg); background:var(--gold); }
nav.links a.cta{ color:var(--bg); background:var(--teal); }
nav.links a.cta:hover{ background:#2ad0e6; }

.burger{ display:none; background:none; border:1px solid var(--border); border-radius:8px; width:42px; height:42px; align-items:center; justify-content:center; cursor:pointer; }
.burger span, .burger span::before, .burger span::after{
  content:''; display:block; width:18px; height:2px; background:var(--text); position:relative; transition:transform .2s, opacity .2s;
}
.burger span::before{ position:absolute; top:-6px; }
.burger span::after{ position:absolute; top:6px; }
.burger.open span{ background:transparent; }
.burger.open span::before{ transform:rotate(45deg); top:0; }
.burger.open span::after{ transform:rotate(-45deg); top:0; }

@media (max-width:820px){
  .burger{ display:flex; }
  nav.links{
    position:fixed; inset:65px 0 auto 0; flex-direction:column; align-items:stretch;
    background:var(--bg-alt); border-bottom:1px solid var(--border);
    padding:10px 20px 20px; gap:4px;
    transform:translateY(-8px); opacity:0; pointer-events:none; transition:transform .18s ease, opacity .18s ease;
  }
  nav.links.open{ transform:translateY(0); opacity:1; pointer-events:auto; }
  nav.links a{ padding:13px 14px; border-radius:8px; }
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-body); font-weight:600; font-size:.95rem;
  padding:13px 24px; border-radius:999px; text-decoration:none;
  border:1px solid transparent; cursor:pointer; transition:transform .15s, background .15s, border-color .15s;
}
.btn:hover{ transform:translateY(-1px); }
.btn-gold{ background:var(--gold); color:#1a1305; }
.btn-gold:hover{ background:var(--gold-hover); }
.btn-outline{ background:transparent; color:var(--text); border-color:var(--border); }
.btn-outline:hover{ border-color:var(--teal); color:var(--teal); }
.btn-row{ display:flex; gap:14px; flex-wrap:wrap; margin-top:28px; }

/* ---------- hero ---------- */
.hero{ padding:72px 0 40px; position:relative; overflow:hidden; }
.hero::before{
  content:''; position:absolute; inset:-20% -10% auto; height:600px;
  background:radial-gradient(60% 60% at 30% 20%, rgba(224,162,58,.12), transparent 70%),
             radial-gradient(50% 50% at 80% 10%, rgba(24,184,204,.10), transparent 70%);
  pointer-events:none;
}
.hero-grid{ position:relative; display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
@media (max-width:900px){ .hero-grid{ grid-template-columns:1fr; gap:40px; } }

.hero-visual{ position:relative; }
.hero-visual svg{ width:100%; height:auto; }

/* pipeline animation */
.qr-dot{ animation:travel 7s linear infinite; }
.pipe-pulse{ stroke-dasharray:6 8; animation:dash 1.6s linear infinite; }
@keyframes travel{
  0%{ offset-distance:0%; opacity:0; }
  4%{ opacity:1; }
  96%{ opacity:1; }
  100%{ offset-distance:100%; opacity:0; }
}
@keyframes dash{ to{ stroke-dashoffset:-28; } }

/* ---------- how it works strip ---------- */
.steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; counter-reset:step; }
@media (max-width:900px){ .steps{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .steps{ grid-template-columns:1fr; } }
.step{ padding:22px; border:1px solid var(--border); border-radius:var(--radius); background:var(--surface); position:relative; }
.step .num{
  font-family:var(--font-mono); color:var(--gold); font-size:.78rem; letter-spacing:.08em;
  display:block; margin-bottom:10px;
}
.step h3{ margin-bottom:8px; font-size:1.02rem; }
.step p{ color:var(--muted); font-size:.92rem; margin:0; }

/* ---------- modules grid ---------- */
.modules{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
@media (max-width:900px){ .modules{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .modules{ grid-template-columns:1fr; } }
.module-card{
  padding:26px; border-radius:var(--radius); background:linear-gradient(180deg, var(--surface), var(--surface-2));
  border:1px solid var(--border); transition:border-color .15s, transform .15s;
}
.module-card:hover{ border-color:var(--teal); transform:translateY(-3px); }
.module-card .icon{ width:42px; height:42px; margin-bottom:16px; color:var(--teal); }
.module-card h3{ margin-bottom:8px; }
.module-card p{ color:var(--muted); font-size:.93rem; margin:0; }
.module-card.wide{ grid-column:span 2; }
@media (max-width:900px){ .module-card.wide{ grid-column:span 1; } }
.tag{
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.06em; text-transform:uppercase;
  color:var(--muted-2); border:1px solid var(--border); border-radius:999px; padding:3px 10px; display:inline-block; margin-bottom:12px;
}

/* ---------- CTA band ---------- */
.cta-band{
  border-radius:20px; background:linear-gradient(135deg, var(--navy-deep), var(--surface));
  border:1px solid var(--border); padding:48px; text-align:center;
}
.cta-band h2{ margin-bottom:10px; }
.cta-band p{ color:var(--muted); max-width:55ch; margin:0 auto; }
.cta-band .btn-row{ justify-content:center; }

/* ---------- footer ---------- */
footer.site{ border-top:1px solid var(--border); padding:40px 0 28px; background:var(--bg-alt); }
.footer-grid{ display:flex; justify-content:space-between; align-items:flex-start; gap:24px; flex-wrap:wrap; }
.footer-grid .brand{ margin-bottom:6px; }
footer.site .muted{ color:var(--muted-2); font-size:.85rem; }
.footer-links{ display:flex; gap:22px; flex-wrap:wrap; }
.footer-links a{ color:var(--muted); text-decoration:none; font-size:.92rem; }
.footer-links a:hover{ color:var(--text); }
.footer-bottom{ margin-top:32px; padding-top:20px; border-top:1px solid var(--border); font-size:.82rem; color:var(--muted-2); display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; }

/* ---------- generic page header (wiecej/kontakt) ---------- */
.page-head{ padding:64px 0 20px; }
.page-head .eyebrow{ margin-bottom:14px; }

/* ---------- funkcje list (wiecej.html) ---------- */
.feature-row{
  display:grid; grid-template-columns:280px 1fr; gap:36px; padding:36px 0; border-bottom:1px solid var(--border);
}
@media (max-width:760px){ .feature-row{ grid-template-columns:1fr; gap:14px; } }
.feature-row h3{ display:flex; align-items:center; gap:10px; }
.feature-row .icon{ width:26px; height:26px; color:var(--gold); flex:none; }
.feature-row ul{ margin:14px 0 0; padding-left:20px; color:var(--muted); }
.feature-row li{ margin-bottom:6px; }
.feature-row p{ color:var(--muted); }

/* ---------- kontakt ---------- */
.contact-card{
  max-width:520px; margin:0 auto; text-align:center; padding:56px 40px;
  border:1px solid var(--border); border-radius:var(--radius); background:var(--surface);
}
.contact-card .icon{ width:46px; height:46px; margin:0 auto 20px; color:var(--gold); }
.contact-email{
  font-family:var(--font-mono); font-size:1.25rem; color:var(--teal); text-decoration:none;
  display:inline-block; margin:14px 0 6px; word-break:break-all;
}
.contact-email:hover{ color:var(--gold); }

.skip-link{
  position:absolute; left:-999px; top:auto;
  background:var(--gold); color:#1a1305; padding:10px 16px; border-radius:8px; font-weight:600;
}
.skip-link:focus{ left:16px; top:16px; z-index:100; }

:focus-visible{ outline:2px solid var(--teal); outline-offset:2px; }