/* Defence Lab Pardubický kraj — hlavní stylopis.
   Vychází ze zadání: klidný, věcný, technický dojem, žádné vojenské motivy. */

:root {
  --c-primary-dark: #0F2540;
  --c-secondary: #2B4A6F;
  --c-accent: #3D9BE9;
  --c-accent-dark: #2C7FC8;
  --c-accent-text: #1F6DB3;
  --c-bg-light: #F2F4F7;
  --c-text: #16202C;
  --c-white: #FFFFFF;
  --c-border: #D7DEE6;

  --font-head: 'Barlow Semi Condensed', 'Arial Narrow', sans-serif;
  --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;

  --measure: 72ch;
  --radius: 4px;
  --gap-section: clamp(2.5rem, 5vw, 4.5rem);
  --gap-block: clamp(1.75rem, 4vw, 3rem);
  --container: 1180px;

  --focus-ring: 3px solid var(--c-accent);
  --header-h: 4.9rem;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-white);
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.12;
  margin: 0 0 0.6em;
  color: var(--c-primary-dark);
  text-wrap: balance;
}
h1 { font-size: clamp(2.3rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); font-weight: 600; }
h4 { font-size: 1.05rem; font-weight: 600; }

p { margin: 0 0 1.1em; max-width: var(--measure); }
p:last-child { margin-bottom: 0; }

a { color: var(--c-accent-text); text-decoration-thickness: 1.5px; text-underline-offset: 0.15em; }
a:hover { color: var(--c-primary-dark); }

ul, ol { padding-left: 1.3em; }

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

:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0; padding: 0; margin: -1px;
}

.skip-link {
  position: absolute;
  left: 1rem; top: -3rem;
  background: var(--c-primary-dark);
  color: var(--c-white);
  padding: 0.7em 1.1em;
  border-radius: var(--radius);
  z-index: 200;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; }

/* ---------- Tlačítka ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius);
  padding: 0.85em 1.4em;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: var(--c-accent);
  color: var(--c-primary-dark);
}
.btn-primary:hover { background: var(--c-accent-dark); color: var(--c-white); }
.btn-secondary {
  background: transparent;
  color: var(--c-white);
  border-color: currentColor;
}
.btn-secondary:hover { background: rgba(255,255,255,0.12); color: var(--c-white); }
.btn-outline {
  background: transparent;
  color: var(--c-primary-dark);
  border-color: var(--c-primary-dark);
}
.btn-outline:hover { background: var(--c-primary-dark); color: var(--c-white); }
.btn-block { width: 100%; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.6rem;
}

/* ---------- Průběh scrollu ---------- */

.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 150;
  pointer-events: none;
}
.scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--c-accent);
}

/* ---------- Hlavička ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-white);
  border-bottom: 1px solid var(--c-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 0.85rem;
  min-height: var(--header-h);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--c-primary-dark);
}
.brand img { height: 34px; width: auto; }
.brand-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.15;
}
.brand-name small { display: block; font-family: var(--font-body); font-weight: 400; font-size: 0.7rem; color: var(--c-secondary); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}
.main-nav ul {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  padding: 0; margin: 0;
}
.main-nav ul a {
  position: relative;
  color: var(--c-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}
.main-nav ul a:hover { color: var(--c-accent-dark); }
.main-nav ul a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -6px;
  height: 2px;
  background: var(--c-accent);
  transition: right 0.2s ease;
}
.main-nav ul a.is-current {
  color: var(--c-primary-dark);
}
.main-nav ul a.is-current::after { right: 0; }
.header-cta { flex-shrink: 0; }

.nav-toggle {
  display: none;
  background: none;
  border: 1.5px solid var(--c-primary-dark);
  border-radius: var(--radius);
  padding: 0.3em 0.55em;
  font-size: 0.9rem;
  line-height: 1;
  color: var(--c-primary-dark);
}

@media (min-width: 901px) {
  .site-header .brand img { height: 46px; }
  .site-header .brand-name { font-size: 1.3rem; }
  .site-header .brand-name small { font-size: 0.8rem; }
}

/* kotvy: nadpis sekce zůstane pod fixní hlavičkou celý vidět */
main > section[id] {
  scroll-margin-top: calc(var(--header-h) + 0.75rem - var(--gap-section));
}

/* mobilní CTA lišta */
.mobile-cta-bar {
  display: none;
}

@media (max-width: 900px) {
  .main-nav { display: none; }
  .nav-toggle { display: inline-flex; align-items: center; gap: 0.3em; }
  :root { --header-h: 3.75rem; }
  .site-header .header-cta { display: none; }

  .main-nav.is-open {
    display: block;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--c-white);
    border-bottom: 1px solid var(--c-border);
    padding: 1rem clamp(1.25rem, 4vw, 2.5rem) 1.5rem;
  }
  .main-nav.is-open ul {
    flex-direction: column;
    gap: 0.9rem;
  }

  .mobile-cta-bar {
    display: flex;
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 90;
    background: var(--c-white);
    border-top: 1px solid var(--c-border);
    padding: 0.6rem 1rem;
    padding-bottom: calc(0.6rem + env(safe-area-inset-bottom));
  }
  body { padding-bottom: 4.2rem; }
}

/* ---------- Sekce, pruhy ---------- */

.section {
  padding-block: var(--gap-section);
}
.section-dark {
  background: var(--c-primary-dark);
  color: var(--c-white);
}
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 { color: var(--c-white); }
.section-light {
  background: var(--c-bg-light);
}
.section-white {
  background: var(--c-white);
}

/* sekce s fotografií a 65% overlay v tmavě modré barvě webu */
.section-photo {
  position: relative;
  background: var(--c-primary-dark) url("../img/region-radar-blueprint.webp") center / cover no-repeat;
  color: var(--c-white);
}
.section-photo::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(15, 37, 64, 0.65);
}
.section-photo > .container { position: relative; }
.section-photo h2 { color: var(--c-white); }
.section-photo .section-lede { color: #DCE7F3; }
.section-photo .benefits-list li { border-left-color: var(--c-accent); }

.section-lede {
  font-size: 1.1rem;
  max-width: 62ch;
  color: var(--c-secondary);
}
.section-dark .section-lede { color: #C6D5E6; }

/* ---------- Hero ---------- */

.hero {
  background: var(--c-primary-dark);
  color: var(--c-white);
  padding-block: clamp(3rem, 8vw, 5.5rem);
}
.hero h1 { color: var(--c-white); }
.hero .container {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.hero-copy p {
  color: #C6D5E6;
  font-size: 1.15rem;
  max-width: 46ch;
}
.hero-note {
  margin-top: 1.4rem;
  font-size: 0.92rem;
  color: #9FB4CC;
  max-width: 42ch;
}
.hero-diagram-wrap {
  display: flex;
  justify-content: center;
}
.hero-diagram-wrap svg { width: 100%; height: auto; max-width: 480px; }

@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-diagram-wrap { max-width: 320px; margin-inline: auto; }
}

/* hub-and-spoke diagram animace (vykreslí se jednou při načtení) */
.hs-line {
  stroke-dasharray: var(--len, 200);
  stroke-dashoffset: var(--len, 200);
  transition: stroke-width 0.2s ease, opacity 0.2s ease;
}
.hs-diagram.is-animating .hs-line {
  animation: hs-draw 900ms ease-out forwards;
  animation-delay: var(--delay, 0ms);
}
.hs-diagram.is-static .hs-line { stroke-dashoffset: 0; }
@keyframes hs-draw {
  to { stroke-dashoffset: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .hs-diagram.is-animating .hs-line { animation: none; stroke-dashoffset: 0; }
}

/* najetí na uzel diagramu zvýrazní jeho spojnici */
.hs-node { cursor: pointer; }
.hs-node-circle {
  stroke: transparent;
  stroke-width: 3px;
  transition: transform 0.2s ease, stroke 0.2s ease;
  transform-box: fill-box;
  transform-origin: center;
}
.hs-icon { pointer-events: none; }
.hs-node:hover .hs-line,
.hs-node:focus-visible .hs-line {
  stroke-width: 3.5;
}
.hs-node:hover .hs-node-circle,
.hs-node:focus-visible .hs-node-circle {
  transform: scale(1.1);
  stroke: var(--c-white);
}
.hs-node:focus-visible { outline: none; }
.hs-center { transition: transform 0.2s ease; transform-box: fill-box; transform-origin: center; }
@media (prefers-reduced-motion: reduce) {
  .hs-node-circle, .hs-center { transition: none; }
  .hs-node:hover .hs-node-circle, .hs-node:focus-visible .hs-node-circle { transform: none; }
}

/* pulzy dat putující po vláknech od Defence Labu k jednotlivým uzlům */
.hs-pulse {
  opacity: 0;
  transition: opacity 0.4s ease;
  filter: drop-shadow(0 0 3px rgba(255,255,255,0.8));
}
.hs-diagram.is-flowing .hs-pulse { opacity: 0.9; }
@media (prefers-reduced-motion: reduce) {
  .hs-pulse { display: none; }
}

/* ---------- Jak Defence Lab funguje ---------- */

.steps {
  list-style: none;
  padding: 0;
  margin: var(--gap-block) 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  counter-reset: step;
}
.step {
  border-top: 3px solid var(--c-accent);
  padding-top: 1.1rem;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease, scale 0.2s ease;
}
.reveal.is-visible .step:nth-child(1) { transition-delay: 0ms, 0ms, 0ms; }
.reveal.is-visible .step:nth-child(2) { transition-delay: 120ms, 120ms, 0ms; }
.reveal.is-visible .step:nth-child(3) { transition-delay: 240ms, 240ms, 0ms; }
.reveal.is-visible .step {
  opacity: 1;
  transform: translateY(0);
}
.step:hover { scale: 1.05; }
@media (prefers-reduced-motion: reduce) {
  .step:hover { scale: none; }
}
.step-number {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 2.2rem;
  color: var(--c-accent);
  display: block;
  margin-bottom: 0.3rem;
}
@media (max-width: 760px) {
  .steps { grid-template-columns: 1fr; gap: 1.75rem; }
}

/* ---------- Technologické zaměření ---------- */

.focus-grid {
  margin-top: var(--gap-block);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.focus-card {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  min-height: 200px;
  padding: 1.1rem 1.5rem 1.1rem 1.1rem;
  background: #EAF3FC;
  border-radius: var(--radius);
  transition: transform 0.2s ease;
}
.focus-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.focus-card:hover,
.focus-card:focus-within {
  transform: translateY(-4px);
}
.focus-card:hover::before,
.focus-card:focus-within::before {
  transform: scaleX(1);
}
@media (prefers-reduced-motion: reduce) {
  .focus-card, .focus-card::before { transition: none; }
  .focus-card:hover, .focus-card:focus-within { transform: none; }
}
.focus-art { width: 100%; height: auto; max-height: 180px; }
.focus-copy h3 { margin-bottom: 0.4rem; }
.focus-copy p { font-size: 0.98rem; }

/* dron: jemné vznášení na místě */
.drone-float {
  transform-box: fill-box;
  transform-origin: center;
  animation: drone-bob 2.6s ease-in-out infinite alternate;
}
@keyframes drone-bob {
  from { transform: translateY(-3px); }
  to { transform: translateY(3px); }
}

@media (max-width: 900px) {
  .focus-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .focus-card { grid-template-columns: 1fr; padding: 1.1rem; }
  .focus-art { max-height: 150px; }
}

/* ---------- Koho propojujeme ---------- */

.who-grid {
  margin-top: var(--gap-block);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.who-card {
  background: var(--c-bg-light);
  border-top: 3px solid var(--c-accent);
  border-radius: var(--radius);
  padding: 1.4rem 1.4rem 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
.who-card:hover {
  transform: scale(1.05);
  background: var(--c-white);
  box-shadow: 0 10px 28px rgba(15, 37, 64, 0.14);
}
@media (prefers-reduced-motion: reduce) {
  .who-card:hover { transform: none; box-shadow: none; }
}
.who-icon { margin-bottom: 0.8rem; }
.who-card h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.who-card p { font-size: 0.95rem; }
@media (max-width: 1000px) {
  .who-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .who-grid { grid-template-columns: 1fr; }
}

/* ---------- Poznámky a modelový příklad ---------- */


/* ---------- Přínos / Důvěryhodná spolupráce ---------- */

.benefits-list {
  list-style: none;
  padding: 0;
  margin: var(--gap-block) 0 0;
  display: grid;
  gap: 1rem;
}
.benefits-list li {
  padding-left: 1.2rem;
  border-left: 3px solid var(--c-secondary);
  max-width: 68ch;
}
.benefits-list strong { color: var(--c-primary-dark); }

/* ---------- Dosah: region, Česko, svět ---------- */

.reach { border-top: 1px solid var(--c-border); }
.reach h2 { font-size: clamp(1.9rem, 6vw, 2.25rem); }
.reach .section-lede { font-size: 1.1rem; }

.reach-levels {
  position: relative;
  margin-top: 1.8rem;
  padding-left: 2rem;
  display: grid;
  gap: 1.6rem;
}
.reach-levels::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  background: #BFE0EC;
}
.reach-level { position: relative; --dot: #3D9BE9; --halo: rgba(61, 155, 233, 0.2); }
.reach-level::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 0.3rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--dot);
  box-shadow: 0 0 0 5px var(--halo);
}
.reach-level--region { --dot: #4FB3D6; --halo: rgba(130, 207, 229, 0.4); }
.reach-level--cr { --dot: #3D9BE9; --halo: rgba(61, 155, 233, 0.2); }
.reach-level--world { --dot: #0F2540; --halo: rgba(15, 37, 64, 0.14); }
.reach-level h3 { font-size: 1.4rem; margin-bottom: 0.25rem; }
.reach-level p { font-size: 1.02rem; }
.reach-svg { display: none; }

@media (min-width: 1100px) {
  .reach-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.38fr) minmax(0, 0.62fr);
    gap: clamp(1.5rem, 3vw, 3rem);
    align-items: center;
  }
  .reach h2 { font-size: clamp(2.4rem, 4vw, 3.6rem); }
  .reach .section-lede { font-size: 1.2rem; }

  .reach-visual {
    position: relative;
    aspect-ratio: 820 / 520;
    container-type: inline-size;
  }
  .reach-svg {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
  }
  .reach-levels {
    position: absolute;
    inset: 0;
    margin: 0;
    padding: 0;
    display: block;
  }
  .reach-levels::before,
  .reach-level::before { display: none; }
  .reach-level {
    --h: clamp(1.15rem, 3.4cqw, 1.8rem);
    position: absolute;
    left: 69.5%;
    right: 0;
    top: var(--top);
    margin-top: calc(var(--h) * -0.55);
  }
  .reach-level h3 { font-size: var(--h); line-height: 1.1; margin: 0 0 0.25em; }
  .reach-level p { font-size: clamp(0.95rem, 2.3cqw, 1.2rem); line-height: 1.4; }
}

/* ---------- FAQ ---------- */

.faq-list {
  margin-top: var(--gap-block);
  max-width: 74ch;
}
.faq-item {
  border-bottom: 1px solid var(--c-border);
}
.faq-item summary {
  cursor: pointer;
  padding: 1.1rem 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--c-primary-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  list-style: none;
  transition: color 0.15s ease;
}
.faq-item summary:hover { color: var(--c-accent-dark); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--c-accent-text);
  flex-shrink: 0;
  display: inline-block;
  transition: transform 0.2s ease;
}
.faq-item[open] summary::after { content: "+"; transform: rotate(45deg); }
.faq-item p { padding-bottom: 1.2rem; overflow: hidden; }
@media (prefers-reduced-motion: reduce) {
  .faq-item summary::after { transition: none; }
}

/* ---------- Kontakt ---------- */

.contact-card {
  margin-top: var(--gap-block);
  max-width: 560px;
  background: var(--c-bg-light);
  padding: 1.8rem 1.7rem;
  border-radius: var(--radius);
}
.contact-card dl { margin: 0; }
.contact-card dt {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-secondary);
  margin-top: 0.9rem;
}
.contact-card dt:first-child { margin-top: 0; }
.contact-card dd { margin: 0.15rem 0 0; }

/* ---------- Patička ---------- */

.site-footer {
  background: var(--c-primary-dark);
  color: #B9C8DA;
  padding-block: 2.5rem;
  font-size: 0.85rem;
}
.site-footer a { color: #DCE7F3; }
.footer-row {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  white-space: nowrap;
}
.footer-ppink { height: 24px; width: auto; flex: 0 0 auto; }
.footer-short { display: none; }
@media (max-width: 640px) {
  .site-footer { font-size: 0.72rem; }
  .footer-row { gap: 0.5rem; }
  .footer-ppink { height: 18px; }
  .footer-long { display: none; }
  .footer-short { display: inline; }
}

/* jemné odhalení sekcí při scrollu */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}