/* ===== Reset & základ ===== */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, p { margin: 0; }
body {
  font-family: 'Montserrat', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fff;
}
a { color: #0077b6; text-decoration: none; }
a:hover { text-decoration: underline; }

/* Kotvy – aby ich nezakrývala sticky hlavička */
section { scroll-margin-top: 90px; }

/* ===== Tlačidlo ===== */
.btn {
  display: inline-block;
  background: #0077b6;
  color: #fff;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 700;
  transition: background .2s ease;
}
.btn:hover { background: #005f8a; }

/* ===== HLAVIČKA – sticky ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}
.site-header .logo img {
  height: 50px;
  width: auto;
  display: block;
}
.site-header .nav a {
  margin-left: 18px;
  color: #333;
  font-weight: 600;
  transition: color .2s ease;
}
.site-header .nav a:hover { color: #0077b6; }

/* ===== HERO ===== */
.hero {
  position: relative;
  background: url('images/industrial-coating-detail.jpg') center/cover no-repeat;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(rgba(0,119,182,0.7), rgba(0,0,0,0.5));
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 36px 28px;
  max-width: 900px;
}
.hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  margin-bottom: 16px;
  font-weight: 700;
  text-shadow: 0 2px 6px rgba(0,0,0,0.4);
}
.hero p {
  font-size: clamp(16px, 2vw, 20px);
  margin-bottom: 22px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.4);
}

/* ===== SLUŽBY ===== */
.services {
  padding: 60px 20px;
  background: #fff;
  text-align: center;
}
.services h2 {
  font-size: clamp(24px, 3vw, 32px);
  margin-bottom: 28px;
  color: #0077b6;
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
  max-width: 1100px;
  margin: 0 auto;
}
.service-card {
  background: #f9f9f9;
  border-radius: 14px;
  padding: 22px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.06);
  text-align: left;
}
.service-card h3 { margin-bottom: 8px; color: #333; }
.service-card p { color: #555; }

/* ===== ZNAČKY ===== */
.brands {
  padding: 60px 20px;
  text-align: center;
  background: #f7f7f7;
}
.brands h2 {
  font-size: clamp(24px, 3vw, 32px);
  margin-bottom: 28px;
  color: #0077b6;
}
.brands-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 22px;
  max-width: 1100px;
  margin: 0 auto;
}
.brand-card {
  background: #fff;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.06);
}
.brand-card h3 { margin-bottom: 6px; color: #333; }
.brand-card p { color: #555; }
.brand-accent { border: 2px solid #0077b6; }

/* ===== KONTAKT ===== */
.contact {
  padding: 60px 20px;
  background: #fff;
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
  max-width: 1100px;
  margin: 0 auto;
}
.contact-card {
  background: #f9f9f9;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.06);
}
.contact-card h2,
.contact-card h3 {
  color: #0077b6;
  margin-bottom: 12px;
}
.contact-card p { margin-bottom: 10px; }
.contact-card a { font-weight: 600; }

.contact-card input,
.contact-card textarea {
  width: 100%;
  padding: 10px;
  margin-bottom: 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-family: inherit;
}
.contact-card button { border: 0; }

/* ===== FOOTER ===== */
.footer {
  background: #0f172a;
  color: #fff;
  text-align: center;
  padding: 24px 16px;
}
.footer a {
  color: #9bd3ff;
  text-decoration: underline;
}
.footer a:hover { text-decoration: none; }
.footer-logo img {
  height: 42px;
  width: auto;
  margin-bottom: 10px;
}

/* ===== Responzívne ===== */
@media (max-width: 768px) {
  .site-header {
    flex-direction: column;
    align-items: center;
    padding: 10px;
  }
  .site-header .logo img {
    height: 45px;
    margin-bottom: 8px;
  }
  .site-header .nav a { margin: 0 8px; }
  .hero { min-height: 60vh; }
}