:root {
  --bg: #0a0f1c;
  --bg-alt: #0f1729;
  --surface: #131c30;
  --surface-2: #1a2540;
  --border: #243150;
  --text: #e8edf7;
  --muted: #9aa8c4;
  --primary: #2f7bff;
  --primary-600: #1f63e0;
  --accent: #38d6c4;
  --radius: 14px;
  --max: 1140px;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 15, 28, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
.logo-mark { color: var(--text); }
.logo-mark.accent { color: var(--accent); }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { color: var(--muted); font-weight: 500; font-size: 15px; transition: color 0.2s; }
.main-nav a:hover { color: var(--text); }
.main-nav .nav-cta {
  color: var(--text);
  background: var(--primary);
  padding: 9px 18px;
  border-radius: 10px;
}
.main-nav .nav-cta:hover { background: var(--primary-600); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px; height: 2px; background: var(--text); border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  padding: 96px 0 80px;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(47, 123, 255, 0.22), transparent 60%),
    radial-gradient(700px 400px at 0% 20%, rgba(56, 214, 196, 0.12), transparent 55%),
    var(--bg);
  overflow: hidden;
}
.hero-inner { max-width: 820px; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 22px;
}
.hero-lead { font-size: 19px; color: var(--muted); max-width: 640px; margin-bottom: 32px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 15px;
  padding: 13px 26px;
  border-radius: 11px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, background 0.2s, border-color 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-600); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); }
.btn-block { width: 100%; }

.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 24px; color: var(--text); }
.hero-stats span { font-size: 14px; color: var(--muted); }

/* Sections */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.section-tag {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 14px;
}
.section h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
  max-width: 760px;
}
.section-lead { color: var(--muted); font-size: 18px; max-width: 720px; margin-bottom: 40px; }

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 22px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s, border-color 0.2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--primary); }
.card-icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  font-size: 22px;
  border-radius: 12px;
  background: var(--surface-2);
  color: var(--accent);
  margin-bottom: 18px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }
.card .more { display: inline-block; margin-top: 14px; color: var(--accent); font-weight: 600; font-size: 14px; }
a.card { cursor: pointer; }

/* Tech grid */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.tech-item {
  display: block;
  padding: 24px;
  border-left: 3px solid var(--primary);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: transform 0.2s, background 0.2s;
}
a.tech-item:hover { transform: translateX(4px); background: var(--surface-2); }
.tech-item h3 { font-size: 17px; margin-bottom: 8px; }
.tech-item p { color: var(--muted); font-size: 15px; }
.tech-item .more { display: inline-block; margin-top: 12px; color: var(--accent); font-weight: 600; font-size: 14px; }

/* Expander */
.expander-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 13px 22px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.2s;
}
.expander-btn:hover { border-color: var(--primary); }
.expander-btn .chev { transition: transform 0.25s; }
.expander-btn.is-open .chev { transform: rotate(180deg); }

.expandable {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, margin-top 0.3s ease;
}
.expandable.open {
  max-height: 1600px;
  opacity: 1;
  margin-top: 28px;
}

/* Prenájom – banner */
.rental-banner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
  background: linear-gradient(135deg, rgba(47,123,255,0.12), rgba(56,214,196,0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}
.rental-text .btn { margin-top: 8px; }
.rental-points { list-style: none; display: grid; gap: 12px; }
.rental-points li {
  position: relative;
  padding-left: 28px;
  color: var(--text);
  font-weight: 500;
}
.rental-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 800;
}

/* Badges */
.badges { display: flex; gap: 16px; flex-wrap: wrap; }
.badge {
  width: 92px; height: 92px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 2px solid var(--accent);
  color: var(--accent);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 1px;
  background: var(--surface);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: start;
}
.contact-list { list-style: none; margin-top: 28px; display: grid; gap: 22px; }
.contact-list li { color: var(--text); }
.contact-label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}
.contact-list a:hover { color: var(--accent); }

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}
.field { margin-bottom: 18px; display: flex; flex-direction: column; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label { font-size: 14px; font-weight: 500; margin-bottom: 7px; color: var(--text); }
.field input,
.field textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(47, 123, 255, 0.18);
}
.field textarea { resize: vertical; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--muted);
  margin: 6px 0 20px;
}
.consent input { margin-top: 4px; accent-color: var(--primary); }
.consent a { color: var(--accent); text-decoration: underline; }

.form-status { margin-top: 14px; font-size: 14px; min-height: 20px; }
.form-status.ok { color: var(--accent); }
.form-status.err { color: #ff7a7a; }

/* Footer */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding-top: 48px; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 32px;
}
.footer-brand .logo-mark { font-size: 22px; font-weight: 800; }
.footer-brand p { color: var(--muted); margin-top: 10px; max-width: 320px; }
.footer-contact { color: var(--muted); }
.footer-contact a:hover { color: var(--accent); }
.footer-partner { display: flex; align-items: center; }
.footer-partner img {
  display: block;
  width: 124px;
  height: 124px;
  transition: transform 0.2s;
}
.footer-partner a:hover img { transform: scale(1.04); }
.footer-bottom { border-top: 1px solid var(--border); padding: 20px 0; }
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--muted);
}
.footer-bottom a:hover { color: var(--accent); }

/* Podstránky */
.subpage-hero {
  padding: 64px 0 40px;
  background:
    radial-gradient(800px 400px at 85% -20%, rgba(47,123,255,0.20), transparent 60%),
    var(--bg);
}
.breadcrumb { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--accent); }
.subpage-hero h1 {
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 800;
  letter-spacing: -0.5px;
  max-width: 800px;
  margin-bottom: 16px;
}
.subpage-hero .lead { font-size: 19px; color: var(--muted); max-width: 720px; }

.article { padding: 24px 0 72px; }
.article .container { max-width: 860px; }
.article h2 { font-size: 26px; font-weight: 700; margin: 36px 0 14px; }
.article p { color: var(--muted); font-size: 17px; margin-bottom: 16px; }
.article ul { margin: 0 0 20px 0; padding-left: 22px; color: var(--muted); }
.article ul li { margin-bottom: 10px; font-size: 17px; }
.article ul li strong { color: var(--text); }

.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 28px 0;
  padding: 0;
  list-style: none;
}
.feature-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin: 0;
}
.feature-list h3 { font-size: 17px; margin-bottom: 8px; color: var(--text); }
.feature-list p { font-size: 15px; margin: 0; }

.cta-box {
  background: linear-gradient(135deg, rgba(47,123,255,0.14), rgba(56,214,196,0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  text-align: center;
  margin-top: 40px;
}
.cta-box h2 { margin-top: 0; }
.cta-box p { max-width: 560px; margin: 0 auto 22px; }

.note-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin: 28px 0;
}
.note-box h3 { font-size: 18px; margin-bottom: 8px; color: var(--text); }
.note-box p { margin: 0; }

/* Responsive */
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .rental-banner { grid-template-columns: 1fr; gap: 28px; padding: 28px; }
}
@media (max-width: 720px) {
  .main-nav {
    position: absolute;
    top: 70px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; }
  .main-nav .nav-cta { text-align: center; margin-top: 8px; }
  .nav-toggle { display: flex; }
  .field-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
}