:root {
  --color-bg: #10171f;
  --color-surface: #1a232c;
  --color-surface-alt: #212d38;
  --color-border: #2a3641;
  --color-text: #c9d3da;
  --color-text-muted: #8a99a6;
  --color-heading: #eef3f6;
  --color-accent: #4fd8e0;
  --color-accent-soft: rgba(79, 216, 224, 0.12);
  --color-cta: #f2a94e;
  --color-cta-dark: #d98f34;
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
  --container-width: 1120px;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

h1, h2, h3, h4 {
  color: var(--color-heading);
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; }

a { color: var(--color-accent); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }

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

ul, ol { padding-left: 1.25em; }
li { margin-bottom: 0.5em; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-accent);
  color: #06282b;
  padding: 0.75em 1.25em;
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
  left: 0;
}

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(16, 23, 31, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
  position: relative;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--color-heading);
  text-decoration: none;
  text-transform: uppercase;
}
.logo span { color: var(--color-accent); }
.logo:hover { text-decoration: none; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.5rem;
}
.menu-toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--color-heading);
  display: block;
}

.main-nav ul {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.main-nav a {
  font-size: 0.9rem;
  color: var(--color-text);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  text-decoration: none;
}

/* Hero */
.hero {
  position: relative;
  padding: 5rem 0 4rem;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(16, 23, 31, 0.88), rgba(16, 23, 31, 0.96)),
    repeating-linear-gradient(0deg, rgba(79, 216, 224, 0.06) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, rgba(79, 216, 224, 0.06) 0 1px, transparent 1px 48px);
}
.hero-inner { position: relative; }
.eyebrow {
  font-family: var(--font-mono);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  display: block;
  margin-bottom: 0.75em;
}
.hero p.lead {
  max-width: 60ch;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* Sections */
.section {
  padding: 3.5rem 0;
  border-top: 1px solid var(--color-border);
}
.section:first-of-type { border-top: none; }

/* Cards & grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
  display: block;
  text-decoration: none;
  color: inherit;
}
.card:hover, .card:focus-visible {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  text-decoration: none;
}
.card img { width: 100%; height: 160px; object-fit: cover; }
.card-body { padding: 1rem 1.1rem; }
.card-title {
  margin: 0;
  font-size: 1rem;
  color: var(--color-heading);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75em 1.5em;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.95rem;
}
.btn-primary {
  background: var(--color-cta);
  color: #241505;
}
.btn-primary:hover { background: var(--color-cta-dark); text-decoration: none; }
.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-outline:hover { background: var(--color-accent-soft); text-decoration: none; }

/* Staff directory */
.staff-dept { margin-bottom: 2.5rem; }
.staff-dept h3 {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.95rem;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5em;
}
.staff-list { list-style: none; padding: 0; margin: 0; }
.staff-list li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding: 0.6em 0;
  border-bottom: 1px dashed var(--color-border);
  margin-bottom: 0;
}
.staff-name { color: var(--color-heading); font-weight: 600; }
.staff-role { color: var(--color-text-muted); flex: 1 1 auto; }
.staff-phone { font-family: var(--font-mono); color: var(--color-accent); white-space: nowrap; }
.staff-email { font-family: var(--font-mono); color: var(--color-accent); white-space: nowrap; }

/* Reference list (accordion) */
.reference-list { list-style: none; padding: 0; margin: 0; }
.reference-item {
  margin-bottom: 0.75em;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.reference-item summary {
  padding: 1.1em 1.25em;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 2.5em;
}
.reference-item summary::-webkit-details-marker { display: none; }
.reference-item summary::after {
  content: "+";
  position: absolute;
  right: 1.25em;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 1.2rem;
}
.reference-item[open] summary::after { content: "\2212"; }
.reference-item summary:hover,
.reference-item summary:focus-visible { background: var(--color-surface-alt); }
.reference-client {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  display: block;
  margin-bottom: 0.35em;
}
.reference-project { color: var(--color-heading); font-weight: 600; }
.reference-detail {
  padding: 0 1.25em 1.25em;
  border-top: 1px solid var(--color-border);
}
.reference-detail p:first-child { margin-top: 1em; }

/* Specs table (Referenciák detail) */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 0.95rem;
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 0.5em 0.75em;
  border-bottom: 1px dashed var(--color-border);
}
.spec-table th {
  color: var(--color-text-muted);
  font-weight: 400;
  width: 40%;
}
.spec-table td { color: var(--color-heading); }

/* Photo grid (Referenciák galleries) */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1em 0;
}
.photo-grid img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

/* Product family block (Termékek category pages) */
.product-family {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 1.75rem;
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
}
.product-family:first-of-type { border-top: none; padding-top: 0; }
.product-family img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  object-fit: cover;
}
.product-family-body h2 { margin-bottom: 0.4em; }
.product-family-body h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-accent);
  margin: 1.1em 0 0.3em;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.contact-card h3 {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-bottom: 0.5em;
}
.map-embed {
  width: 100%;
  height: 320px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.contact-form {
  display: grid;
  gap: 1rem;
  max-width: 560px;
}
.form-field label {
  display: block;
  margin-bottom: 0.35em;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}
.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.75em 1em;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  color: var(--color-heading);
  font-family: inherit;
  font-size: 1rem;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0;
  text-align: center;
}
.footer-logo { margin: 0 auto 1em; max-width: 160px; }
.footer-text { color: var(--color-text-muted); font-size: 0.85rem; margin: 0; }

/* Responsive */
@media (max-width: 860px) {
  .menu-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    display: none;
  }
  .main-nav.is-open { display: block; }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 1rem 1.5rem;
  }
  .main-nav li { border-bottom: 1px solid var(--color-border); }
  .main-nav a { display: block; padding: 0.9em 0; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .product-family { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
}

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