:root {
  --black:   #0A0C0F;
  --surface: #111418;
  --card:    #181C22;
  --border:  #1E242C;
  --blue:    #2563EB;
  --blue-hi: #3B82F6;
  --blue-lo: #1D4ED8;
  --white:   #F0F2F5;
  --muted:   #6B7785;
  --dim:     #3A4452;
  --display: 'DM Sans', sans-serif;
  --body:    'Inter', sans-serif;
  --mono:    'JetBrains Mono', monospace;
  --r: 6px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--black);
  color: var(--white);
  font-family: var(--body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1rem 6vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
nav.scrolled {
  background: rgba(10,12,15,0.94);
  backdrop-filter: blur(14px);
  border-color: var(--border);
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}
.logo img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
}
.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  list-style: none;
}
.nav-links a {
  font-size: 0.88rem;
  color: var(--muted);
  transition: color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-cta {
  background: var(--blue) !important;
  color: white !important;
  padding: 0.5rem 1.1rem;
  border-radius: var(--r);
  font-weight: 500;
  font-size: 0.88rem !important;
  transition: background var(--transition) !important;
}
.nav-cta:hover { background: var(--blue-hi) !important; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 102;
}
.hamburger span { width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }

/* SECTIONS */
section { padding: 6rem 6vw; }
.section-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--blue-hi);
  margin-bottom: 1rem;
}
.section-title {
  font-family: var(--display);
  font-size: clamp(1.9rem, 3.5vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  line-height: 1.1;
}
.section-sub {
  font-size: 1rem;
  color: var(--muted);
  max-width: 560px;
  line-height: 1.7;
  font-weight: 300;
}

/* BUTTONS */
.btn-primary {
  background: var(--blue);
  color: white;
  padding: 0.8rem 1.6rem;
  border-radius: var(--r);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  border: none;
  transition: background var(--transition), transform var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--body);
}
.btn-primary:hover { background: var(--blue-hi); transform: translateY(-1px); }
.btn-secondary {
  color: var(--muted);
  padding: 0.8rem 1.6rem;
  border-radius: var(--r);
  font-weight: 500;
  font-size: 0.92rem;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--body);
}
.btn-secondary:hover { color: var(--white); border-color: var(--dim); }

/* FOOTER */
footer {
  padding: 2.5rem 6vw;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-links { display: flex; gap: 1.5rem; font-size: 0.82rem; color: var(--muted); flex-wrap: wrap; }
.footer-links a:hover { color: var(--white); }
.footer-copy { font-size: 0.78rem; color: var(--dim); font-family: var(--mono); }

/* POPUP */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.overlay.active { opacity: 1; pointer-events: all; }
.popup {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  max-width: 480px; width: 100%;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition);
  max-height: 90vh; overflow-y: auto;
}
.overlay.active .popup { transform: translateY(0); }
.popup-close {
  position: absolute; top: 1rem; right: 1rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; color: var(--muted);
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 1.1rem;
  transition: color var(--transition), border-color var(--transition);
}
.popup-close:hover { color: var(--white); border-color: var(--dim); }
.popup h2 { font-family: var(--display); font-size: 1.4rem; font-weight: 700; margin-bottom: 0.4rem; letter-spacing: -0.01em; }
.popup p.popup-desc { font-size: 0.875rem; color: var(--muted); margin-bottom: 1.5rem; line-height: 1.6; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.78rem; color: var(--muted); margin-bottom: 0.4rem; font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.06em; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); color: var(--white);
  padding: 0.7rem 0.9rem; font-size: 0.9rem; font-family: var(--body);
  transition: border-color var(--transition); outline: none; resize: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--blue); }
.form-group select option { background: var(--card); }
.form-group textarea { min-height: 90px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.info-box {
  background: rgba(37,99,235,0.1); border: 1px solid rgba(37,99,235,0.2);
  border-radius: var(--r); padding: 0.75rem 1rem;
  font-size: 0.8rem; color: var(--blue-hi); margin-bottom: 1.2rem; line-height: 1.5;
}
.form-submit {
  width: 100%; padding: 0.85rem; background: var(--blue); color: white;
  border: none; border-radius: var(--r); font-size: 0.95rem; font-weight: 600;
  cursor: pointer; transition: background var(--transition); font-family: var(--body);
}
.form-submit:hover { background: var(--blue-hi); }
.success-msg { text-align: center; padding: 2rem 0; display: none; }
.success-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.success-msg h3 { font-family: var(--display); font-size: 1.2rem; margin-bottom: 0.5rem; }
.success-msg p { color: var(--muted); font-size: 0.875rem; }

/* REVEAL */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* DOC PAGES (regulamin, prywatnosc etc) */
.doc-shell {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 4vw;
  max-width: 1100px;
  margin: 0 auto;
  padding: 8rem 6vw 6rem;
}
.doc-meta { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); }
.doc-meta .back { display: inline-block; margin-bottom: 2rem; text-decoration: none; color: var(--muted); }
.doc-meta .back:hover { color: var(--blue-hi); }
.doc-meta .updated { border-top: 1px solid var(--border); margin-top: 1.5rem; padding-top: 1.5rem; position: sticky; top: 5rem; }
.doc-meta .updated strong { display: block; color: var(--white); font-family: var(--body); font-size: 0.85rem; margin-bottom: 0.3rem; }
.doc-content { max-width: 680px; }
.doc-content h1 { font-family: var(--display); font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 700; letter-spacing: -0.01em; margin-bottom: 0.5rem; }
.doc-content > p.subtitle { color: var(--muted); margin-bottom: 3rem; font-size: 1rem; }
.doc-content h2 { font-family: var(--display); font-size: 1.2rem; font-weight: 600; margin-top: 2.5rem; margin-bottom: 0.8rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.doc-content h2:first-of-type { border-top: none; padding-top: 0; }
.doc-content p, .doc-content li { color: var(--muted); font-size: 0.95rem; }
.doc-content p { margin-bottom: 1rem; }
.doc-content ul, .doc-content ol { margin: 0 0 1.2rem 1.3rem; }
.doc-content li { margin-bottom: 0.4rem; }
.doc-content strong { color: var(--white); }
.doc-content table { width: 100%; border-collapse: collapse; margin: 1.5rem 0 2rem; font-size: 0.88rem; }
.doc-content th, .doc-content td { text-align: left; padding: 0.65rem 0.8rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.doc-content th { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 500; }
.doc-content a { color: var(--blue-hi); }
.doc-content a:hover { text-decoration: underline; }
.contact-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--r); padding: 1.5rem; margin-top: 2.5rem; font-size: 0.92rem; color: var(--muted); }
.contact-card a { color: var(--blue-hi); }

/* MOBILE */
@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: 0; right: -100%; width: 280px; height: 100vh;
    background: var(--card); border-left: 1px solid var(--border);
    flex-direction: column; justify-content: center; padding: 2rem;
    transition: right var(--transition); gap: 1.5rem; z-index: 101;
  }
  .nav-links.open { right: 0; }
  .nav-links a { font-size: 1.1rem; }
  .hamburger { display: flex; }
  .form-row { grid-template-columns: 1fr; }
  footer { flex-direction: column; text-align: center; }
  .popup { padding: 1.75rem; }
  .doc-shell { grid-template-columns: 1fr; padding-top: 6rem; }
  .doc-meta .updated { position: static; }
}
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }