/* ============================================================
   Ing. David Lupač — v2 „Blueprint"
   Kratší, živější. Tmavý antracit + elektrická modrá + blueprint.
   ============================================================ */

:root {
  --ink: #07090c;
  --panel: #0e1116;
  --blue-paper: #0b1524;        /* blueprint podklad */
  --blue-line: #6ea8ff;         /* blueprint tah */
  --line: rgba(237, 239, 242, 0.08);
  --line-strong: rgba(237, 239, 242, 0.16);
  --text: #edeff2;
  --muted: #8b939f;
  --muted-2: #5c6570;
  --accent: #3d8bff;
  --accent-soft: rgba(61, 139, 255, 0.14);
  --accent-glow: rgba(61, 139, 255, 0.35);

  --font-display: "Archivo", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --max-w: 1160px;
  --gutter: clamp(20px, 4vw, 44px);
  --radius: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--accent); color: #fff; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.06;
  margin: 0;
  text-wrap: balance;
}
.h-display { font-size: clamp(2.5rem, 6.2vw, 4.8rem); }
.h-section { font-size: clamp(1.8rem, 3.8vw, 2.8rem); }
.lead { font-size: clamp(1.02rem, 1.5vw, 1.18rem); color: var(--muted); max-width: 58ch; }
.mono { font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--muted); }
.accent { color: var(--accent); }

.wrap { max-width: var(--max-w); margin: 0 auto; padding-inline: var(--gutter); }
section { padding-block: clamp(70px, 10vh, 120px); position: relative; }

.kota {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 0.74rem;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent);
}
.kota::before { content: ""; width: 32px; height: 1px; background: var(--accent); box-shadow: 0 0 12px var(--accent-glow); }
.section-head { display: flex; flex-direction: column; gap: 16px; margin-bottom: clamp(34px, 5vh, 56px); max-width: 720px; }

/* ---------- Loader ---------- */
#loader {
  position: fixed; inset: 0; z-index: 200; background: var(--ink);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px;
  transition: opacity 0.55s var(--ease), visibility 0.55s;
}
#loader.done { opacity: 0; visibility: hidden; }
#loader .name { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.3rem, 3vw, 1.8rem); letter-spacing: -0.02em; }
#loader .bar { width: min(220px, 60vw); height: 1px; background: var(--line-strong); overflow: hidden; }
#loader .bar i { display: block; height: 100%; width: 0; background: var(--accent); box-shadow: 0 0 14px var(--accent-glow); transition: width 0.3s var(--ease); }

#progress { position: fixed; top: 0; left: 0; height: 2px; width: 0; background: var(--accent); box-shadow: 0 0 12px var(--accent-glow); z-index: 120; }

#cursor-glow {
  position: fixed; width: 480px; height: 480px; border-radius: 50%;
  pointer-events: none; z-index: 1; left: -600px; top: -600px;
  background: radial-gradient(circle, rgba(61,139,255,0.07) 0%, transparent 62%);
  transform: translate(-50%, -50%);
}

/* ---------- Navigace ---------- */
header { position: fixed; inset: 0 0 auto 0; z-index: 100; border-bottom: 1px solid transparent; transition: background 0.4s, border-color 0.4s; }
header.scrolled { background: rgba(7,9,12,0.72); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-color: var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: baseline; gap: 10px; font-family: var(--font-display); font-weight: 600; }
.brand .mark { font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent); letter-spacing: 0.18em; }
.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links a { font-size: 0.88rem; color: var(--muted); transition: color 0.25s; }
.nav-links a:hover { color: var(--text); }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 24px; border-radius: 999px;
  font-size: 0.9rem; font-weight: 550; font-family: var(--font-body);
  border: 1px solid var(--line-strong); color: var(--text); background: transparent; cursor: pointer;
  transition: border-color 0.3s, transform 0.3s var(--ease), box-shadow 0.3s;
}
.btn:hover { border-color: var(--accent); transform: translateY(-2px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { box-shadow: 0 8px 32px var(--accent-glow); }
.btn .arr { transition: transform 0.3s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }
#nav-toggle { display: none; }

/* ---------- Hero ---------- */
#hero { min-height: 100svh; display: flex; align-items: center; padding-top: 68px; overflow: hidden; }
#hero-canvas { position: absolute; inset: 0; z-index: 0; }
#hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(70% 65% at 72% 42%, transparent 0%, rgba(7,9,12,0.55) 70%, var(--ink) 100%),
    linear-gradient(to bottom, rgba(7,9,12,0.3), transparent 35%, var(--ink) 97%);
}
.hero-inner { position: relative; z-index: 2; width: 100%; }
.hero-eyebrow { margin-bottom: 22px; display: block; }
.hero-title { max-width: 14ch; }
.hero-title .line { display: block; overflow: hidden; }
.hero-title .line > span { display: inline-block; will-change: transform; }
.hero-sub { margin-top: 24px; }
.hero-cta { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }

/* animované čítače přímo v heru */
.hero-stats {
  margin-top: clamp(40px, 7vh, 72px);
  display: flex; gap: clamp(28px, 5vw, 64px); flex-wrap: wrap;
  border-top: 1px solid var(--line); padding-top: 22px;
}
.hero-stats div { display: flex; flex-direction: column; gap: 4px; }
.hero-stats strong { display: flex; align-items: baseline; gap: 7px; font-weight: 600; }
.hero-stats .num {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(2.3rem, 4.4vw, 3.5rem);
  letter-spacing: -0.035em; line-height: 0.95;
  font-variant-numeric: tabular-nums;
}
.hero-stats .unit {
  font-style: normal; font-family: var(--font-mono);
  font-size: clamp(0.78rem, 1.1vw, 0.95rem);
  color: var(--accent); letter-spacing: 0.06em;
}
.hero-stats .unit em { font-style: normal; color: var(--muted-2); font-size: 0.85em; vertical-align: super; }
.hero-stats span { font-size: 0.72rem; color: var(--muted); font-family: var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; }

.scroll-hint {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--muted-2); font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.2em; text-transform: uppercase;
}
.scroll-hint i { width: 1px; height: 40px; background: linear-gradient(to bottom, var(--accent), transparent); animation: drop 2.2s var(--ease) infinite; }
@keyframes drop {
  0% { transform: scaleY(0); transform-origin: top; }
  45% { transform: scaleY(1); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- O mně ---------- */
.about-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(36px, 5vw, 72px); align-items: start; }
.portrait { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.portrait img { width: 100%; height: auto; filter: saturate(0.92); }
.portrait::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(7,9,12,0.45), transparent 45%); }
.portrait .tag {
  position: absolute; left: 14px; bottom: 12px; z-index: 2;
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em;
  background: rgba(7,9,12,0.55); border: 1px solid var(--line);
  padding: 6px 11px; border-radius: 8px; backdrop-filter: blur(8px);
}
.about-copy p { margin: 0 0 1.1em; color: #c6ccd4; }
.about-copy p strong { color: var(--text); font-weight: 600; }

/* certifikace jako čipy */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; padding: 0; list-style: none; }
.chips li {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text); border: 1px solid var(--line-strong); background: var(--panel);
  padding: 9px 14px; border-radius: 999px;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s var(--ease);
}
.chips li:hover { border-color: var(--accent); box-shadow: 0 0 18px rgba(61,139,255,0.2); transform: translateY(-2px); }
.chips li::before { content: "✓ "; color: var(--accent); }

/* ---------- Služby ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; display: flex; flex-direction: column; gap: 10px; overflow: hidden;
  transition: border-color 0.35s, transform 0.35s var(--ease), background 0.35s;
}
.card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity 0.4s;
  background: radial-gradient(380px circle at var(--mx, 50%) var(--my, 0%), rgba(61,139,255,0.12), transparent 60%);
}
.card:hover { border-color: rgba(61,139,255,0.4); transform: translateY(-4px); background: #121722; }
.card:hover::before { opacity: 1; }
.card .idx { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.16em; color: var(--accent); }
.card h3 { font-size: 1.12rem; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 0.88rem; line-height: 1.55; }

/* ---------- Blueprint galerie ---------- */
#blueprints { background: linear-gradient(to bottom, transparent, rgba(61,139,255,0.03), transparent); border-block: 1px solid var(--line); }
.bp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.bp-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid rgba(110, 168, 255, 0.22);
  background:
    linear-gradient(rgba(110,168,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110,168,255,0.05) 1px, transparent 1px),
    var(--blue-paper);
  background-size: 26px 26px, 26px 26px, auto;
  transition: transform 0.4s var(--ease), border-color 0.4s, box-shadow 0.4s;
  will-change: transform;
}
.bp-card:hover { border-color: rgba(110,168,255,0.55); box-shadow: 0 18px 50px rgba(13, 40, 80, 0.55); }
.bp-card svg { width: 100%; height: auto; display: block; }
.bp-card .bp-cap {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 18px; border-top: 1px dashed rgba(110,168,255,0.3);
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--blue-line);
}
.bp-card .bp-cap b { color: var(--text); font-weight: 500; }

/* kreslení tahů */
.bp-card .draw { stroke-dasharray: 1; stroke-dashoffset: 1; }
.bp-card.inview .draw { animation: draw 2.2s var(--ease) forwards; animation-delay: var(--d, 0s); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.bp-card text { font-family: "IBM Plex Mono", monospace; fill: rgba(110,168,255,0.75); }
.bp-card.inview .blink { animation: blink 2.4s steps(2) infinite 2.2s; }
@keyframes blink { 50% { opacity: 0.25; } }

/* ---------- Kontakt / CTA ---------- */
#contact { text-align: center; overflow: hidden; }
#contact .halo {
  position: absolute; left: 50%; top: 55%; width: 880px; height: 880px;
  transform: translate(-50%, -50%); pointer-events: none;
  background: radial-gradient(circle, rgba(61,139,255,0.1), transparent 60%);
}
#contact .wrap { position: relative; }
#contact h2 { max-width: 24ch; margin-inline: auto; }
#contact .lead { margin: 22px auto 36px; }
.contact-rows {
  display: flex; justify-content: center; gap: clamp(20px, 4vw, 52px); flex-wrap: wrap;
  margin-top: 48px; padding-top: 26px; border-top: 1px solid var(--line);
}
.contact-rows div { display: flex; flex-direction: column; gap: 3px; }
.contact-rows .k { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.contact-rows .v { font-size: 1rem; }
.contact-rows a.v:hover { color: var(--accent); }

footer { border-top: 1px solid var(--line); padding: 32px 0 40px; color: var(--muted); font-size: 0.82rem; }
.footer-row { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }
footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer a:hover { color: var(--text); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); }
.no-js .reveal, .reduced .reveal { opacity: 1; transform: none; }

/* ---------- Responzivita ---------- */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .bp-grid { grid-template-columns: 1fr; max-width: 560px; margin-inline: auto; }
}
@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; }
  .portrait { max-width: 420px; }
  .nav-links {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: flex-start;
    background: rgba(7,9,12,0.96); backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line); padding: 26px var(--gutter) 34px; gap: 20px;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity 0.3s, transform 0.3s var(--ease), visibility 0.3s;
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: none; }
  #nav-toggle { display: inline-flex; flex-direction: column; gap: 5px; background: none; border: none; padding: 10px; cursor: pointer; }
  #nav-toggle span { width: 22px; height: 1.5px; background: var(--text); transition: transform 0.3s var(--ease), opacity 0.3s; }
  #nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  #nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  #nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
}
@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
  .hero-stats { gap: 18px 26px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .bp-card .draw { stroke-dashoffset: 0 !important; }
}