:root {
  --bg: #ffffff;
  --bg-alt: #f2f6fc;
  --text: #0f1b2d;
  --muted: #55627a;
  --brand: #0a3a8c;
  --brand-2: #1f6bff;
  --accent: #ffb703;
  --accent-2: #ff8a00;
  --border: #dfe6f1;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(10, 58, 140, .10);
  --shadow-lg: 0 24px 60px rgba(10, 58, 140, .18);
  --grad: linear-gradient(135deg, #061a45 0%, #0a3a8c 55%, #1f6bff 120%);
  --grad-accent: linear-gradient(135deg, var(--accent), var(--accent-2));
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a111c; --bg-alt: #101a2a; --text: #e9eff8; --muted: #9aa8bd;
    --brand: #7aa8ff; --border: #1f2d44; --shadow: 0 10px 30px rgba(0,0,0,.35); --shadow-lg: 0 24px 60px rgba(0,0,0,.5);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.65 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); }
.container { width: min(1160px, 100% - 40px); margin-inline: auto; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.3rem; letter-spacing: -.02em; color: var(--text); text-decoration: none; }
.logo svg { padding: 6px; width: 38px; height: 38px; border-radius: 11px; background: var(--grad-accent); color: #1a1200; box-shadow: 0 6px 16px rgba(255,138,0,.4); }
nav { display: flex; align-items: center; gap: 30px; }
nav a:not(.btn) { color: var(--text); text-decoration: none; font-weight: 500; position: relative; }
nav a:not(.btn)::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px; background: var(--grad-accent); transition: width .25s; }
nav a:not(.btn):hover::after { width: 100%; }
.menu-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 10px; width: 42px; height: 42px; font-size: 1.3rem; color: var(--text); cursor: pointer; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 14px 26px; border-radius: 12px; border: 0;
  background: var(--grad-accent); color: #1a1200 !important; font-weight: 700; text-decoration: none; cursor: pointer; font-size: 1rem;
  box-shadow: 0 10px 24px rgba(255,138,0,.35); transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(255,138,0,.5); }
.btn-small { padding: 9px 18px; font-size: .95rem; }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff !important; border: 1px solid rgba(255,255,255,.35); box-shadow: none; backdrop-filter: blur(6px); }
.btn-ghost:hover { background: rgba(255,255,255,.18); box-shadow: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff; padding: 110px 0 120px;
  background:
    radial-gradient(600px 400px at 85% 10%, rgba(255,183,3,.28), transparent 70%),
    radial-gradient(700px 500px at 0% 100%, rgba(31,107,255,.55), transparent 70%),
    var(--grad);
}
.hero::before { /* elektrická mriežka */
  content: ""; position: absolute; inset: 0; opacity: .5;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 60% 40%, #000 20%, transparent 75%);
}
.hero::after { /* zakrivený prechod do ďalšej sekcie */
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 60px; background: var(--bg);
  clip-path: ellipse(60% 100% at 50% 100%);
}
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.35fr 1fr; gap: 56px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 99px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
  color: var(--accent); text-transform: uppercase; letter-spacing: .12em; font-weight: 700; font-size: .78rem; margin: 0 0 20px;
}
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .35; } }
h1 { font-size: clamp(2.2rem, 5vw, 3.7rem); line-height: 1.08; letter-spacing: -.03em; margin: 0 0 20px; }
.lead { font-size: 1.2rem; color: rgba(255,255,255,.85); max-width: 56ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.stats { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stats li {
  background: linear-gradient(160deg, rgba(255,255,255,.16), rgba(255,255,255,.05));
  border: 1px solid rgba(255,255,255,.2); border-radius: var(--radius); padding: 24px 20px;
  backdrop-filter: blur(10px); box-shadow: 0 12px 30px rgba(0,0,0,.2);
  transition: transform .25s;
}
.stats li:nth-child(even) { transform: translateY(18px); }
.stats li:hover { transform: translateY(-4px); }
.stats li:nth-child(even):hover { transform: translateY(14px); }
.stats strong { display: block; font-size: 2.2rem; line-height: 1.1; background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stats span { font-size: .9rem; color: rgba(255,255,255,.8); }

/* ---------- Sections ---------- */
.section { padding: 100px 0; }
.section.alt { background: var(--bg-alt); }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.5rem); letter-spacing: -.02em; line-height: 1.2; margin: 0 0 12px; }
h2::after { content: ""; display: block; width: 56px; height: 5px; border-radius: 3px; background: var(--grad-accent); margin-top: 14px; }
.section-lead { color: var(--muted); margin: 18px 0 44px; max-width: 60ch; font-size: 1.08rem; }
h3 { margin: 0 0 8px; font-size: 1.18rem; }

/* Služby */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.card {
  position: relative; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow); overflow: hidden; transition: transform .3s, box-shadow .3s, border-color .3s;
}
.card::before { content: ""; position: absolute; left: 0; top: 0; right: 0; height: 4px; background: var(--grad-accent); transform: scaleX(0); transform-origin: left; transition: transform .35s; }
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card:hover::before { transform: scaleX(1); }
.card p { margin: 0; color: var(--muted); }
.icon {
  font-size: 1.7rem; width: 60px; height: 60px; display: grid; place-items: center; margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(31,107,255,.14), rgba(255,183,3,.2)); border-radius: 16px;
  transition: transform .3s;
}
.card:hover .icon { transform: rotate(-8deg) scale(1.1); }

/* Postup */
.steps { list-style: none; counter-reset: s; margin: 44px 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 28px; position: relative; }
.steps li { counter-increment: s; position: relative; padding: 76px 24px 24px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.steps li::before {
  content: counter(s); position: absolute; top: 20px; left: 24px; width: 44px; height: 44px; border-radius: 14px;
  background: var(--grad); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 1.1rem; box-shadow: 0 8px 18px rgba(10,58,140,.35);
}
.steps li:not(:last-child)::after { content: "→"; position: absolute; top: 26px; right: -22px; color: var(--accent-2); font-size: 1.4rem; font-weight: 800; z-index: 1; }
.steps p { margin: 0; color: var(--muted); }

/* Referencie */
.refs { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; margin-top: 40px; }
.ref { margin: 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: var(--bg); box-shadow: var(--shadow); transition: transform .3s, box-shadow .3s; }
.ref:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.ref-img {
  height: 220px; position: relative;
  background: linear-gradient(135deg, hsl(var(--h) 75% 22%), hsl(calc(var(--h) + 35) 80% 48%));
}
.ref-img::before {
  content: ""; position: absolute; inset: 0; opacity: .35;
  background-image: linear-gradient(rgba(255,255,255,.25) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.25) 1px, transparent 1px);
  background-size: 28px 28px;
}
.ref-img::after { content: "⚡"; position: absolute; right: 18px; bottom: 12px; font-size: 3.4rem; opacity: .35; transition: transform .4s, opacity .4s; }
.ref:hover .ref-img::after { transform: scale(1.3) rotate(10deg); opacity: .7; }
.ref figcaption { padding: 20px 22px; display: flex; flex-direction: column; gap: 2px; }
.ref figcaption span { color: var(--muted); font-size: .92rem; }
.note { color: var(--muted); font-size: .85rem; margin-top: 18px; }

/* O nás */
.about { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: center; }
.about p { color: var(--muted); font-size: 1.05rem; }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.checks li {
  background: var(--bg); border: 1px solid var(--border); border-radius: 14px; padding: 15px 18px 15px 56px; position: relative; font-weight: 500;
  box-shadow: var(--shadow); transition: transform .2s;
}
.checks li:hover { transform: translateX(6px); }
.checks li::before {
  content: "✓"; position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 28px; height: 28px; border-radius: 50%;
  background: var(--grad-accent); color: #1a1200; display: grid; place-items: center; font-weight: 800; font-size: .9rem;
}

/* Kontakt */
#kontakt { background: var(--bg); }
.contact { max-width: 640px; }
.contact > div:first-child p { color: var(--muted); }
address { font-style: normal; margin-top: 28px; padding: 24px; border-radius: var(--radius); background: var(--grad); color: #fff; box-shadow: var(--shadow-lg); }
address p { margin: 0 0 12px; color: #fff !important; }
address p:last-child { margin: 0; opacity: .85; }
address a { color: var(--accent); font-weight: 600; }

/* Footer */
.site-footer { background: #061a45; color: #b9c6df; padding: 28px 0; font-size: .92rem; border-top: 4px solid var(--accent); }
.site-footer .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: var(--accent); text-decoration: none; font-weight: 600; }

/* Scroll animácie */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; scroll-behavior: auto !important; }
}

/* ---------- Mobil ---------- */
@media (max-width: 860px) {
  .hero-inner, .about { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 64px 0 90px; }
  .section { padding: 64px 0; }
  .stats li:nth-child(even) { transform: none; }
  .steps li:not(:last-child)::after { display: none; }
  .menu-toggle { display: block; }
  nav {
    display: none; position: absolute; top: 70px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--border); padding: 8px 20px 20px; box-shadow: var(--shadow);
  }
  nav.open { display: flex; }
  nav a:not(.btn) { padding: 12px 0; }
  nav .btn { text-align: center; margin-top: 8px; }
}