:root {
  --bg: #f5f5f5;
  --fg: #111111;
  --accent: #1e88e5;
  --muted: #777777;
  --card-bg: #ffffff;
  --border: #e0e0e0;
  --radius: 10px;
  --shadow: 0 10px 25px rgba(0,0,0,0.06);
  --max-width: 1100px;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* Header */

header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245,245,245,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.8rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.nav-links a {
  position: relative;
  padding-bottom: 0.1rem;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.2s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0.2rem;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--fg);
  margin: 4px 0;
}

/* Layout */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.2rem 3rem;
}

section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

h1, h2, h3 {
  font-weight: 600;
  letter-spacing: 0.03em;
}

h2 {
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
}

p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Hero */

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-title {
  font-size: clamp(2rem, 3vw, 2.6rem);
  margin-bottom: 1rem;
}

.hero-subtitle {
  margin-bottom: 1.5rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.tag {
  font-size: 0.75rem;
  text-transform: uppercase;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  border: none;
  cursor: pointer;
}

.btn-ghost {
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
}

.hero-image-card {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 1.2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.hero-image-card img {
  border-radius: 14px;
}

/* Oferta */

.offer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.offer-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1rem;
  border: 1px solid var(--border);
  box-shadow: 0 6px 18px rgba(0,0,0,0.03);
}

.offer-card img {
  border-radius: 8px;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.offer-title {
  font-size: 1rem;
  font-weight: 600;
}

.offer-link {
  margin-top: 0.4rem;
  font-size: 0.85rem;
  color: var(--accent);
}

/* Kontakt */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.contact-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.2rem;
  border: 1px solid var(--border);
}

input, textarea {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-family: inherit;
}

textarea {
  min-height: 120px;
}

/* Responsive */

@media (max-width: 800px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .offer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
}

@media (max-width: 520px) {
  .offer-grid {
    grid-template-columns: 1fr;
  }
}