/* ============================================================
   SHARED — Nav, Footer, společné komponenty
   shared.css
   ============================================================ */


/* ----------------------------------------
   NAVIGACE — floating pill
   ---------------------------------------- */

.nav {
  position: fixed;
  top: var(--sp-8);
  left: 50%;
  transform: translateX(-50%) translateY(0);
  width: calc(100% - var(--sp-8));
  max-width: 580px;
  z-index: var(--z-nav);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(224, 48, 48, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18), 0 1px 0 rgba(0, 0, 0, 0.06);
  transition:
    background var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    border-radius var(--dur-base) var(--ease-out),
    opacity var(--dur-base) var(--ease-out);
}

.nav--scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.22), 0 1px 0 rgba(0, 0, 0, 0.08);
}

.nav--solid {
  background: #FFFFFF;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.22), 0 1px 0 rgba(0, 0, 0, 0.08);
}

.nav.is-menu-open {
  border-radius: var(--radius-xl);
}

.nav--hidden {
  opacity: 0.35;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
}

.nav__logo {
  position: fixed;
  top: var(--sp-6);
  left: var(--sp-8);
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.nav__logo:hover { opacity: 0.75; }

/* Logo — tmavé téma */
.nav__logo img {
  height: 80px;
  width: auto;
  display: block;
  filter: brightness(0) saturate(100%) invert(27%) sepia(95%) saturate(1100%) hue-rotate(330deg) brightness(92%);
  transition: height var(--dur-base) var(--ease-out),
              filter var(--dur-base) var(--ease-out);
}

/* Logo — tmavá sekce (hero, příběh) → bílé */
.nav__logo--on-dark img {
  filter: brightness(0) invert(1);
}

/* Varianta bez filtru — logo v původní tmavé barvě */
.nav__logo--light img {
  filter: brightness(0);
}

.nav__logo--scrolled img {
  height: 52px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav__links a:not(.btn) {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--txt-secondary);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  transition: background 200ms var(--ease-out), color 200ms var(--ease-out);
  position: relative;
}

.nav__links a:not(.btn):hover {
  background: var(--clr-accent);
  color: var(--clr-white);
}

/* Aktivní stránka */
.nav__links a.is-active {
  color: var(--clr-accent);
  font-weight: 600;
}

.nav__cta {
  padding: 7px 18px !important;
  font-size: var(--fs-sm) !important;
  font-weight: 600 !important;
  letter-spacing: 0 !important;
  text-transform: none !important;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    transform var(--dur-fast) var(--ease-spring) !important;
}
.nav__cta:hover {
  box-shadow:
    0 0 16px rgba(224, 48, 48, 0.55),
    0 0 40px rgba(224, 48, 48, 0.20) !important;
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
  cursor: pointer;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--txt-primary);
  border-radius: 2px;
  transition:
    transform var(--dur-base) var(--ease-out),
    opacity var(--dur-base) var(--ease-out);
}

.nav__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobilní menu — dropdown uvnitř pill */
.nav__mobile {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition:
    max-height var(--dur-base) var(--ease-out),
    opacity var(--dur-fast) var(--ease-out);
}

.nav__mobile.is-open {
  max-height: 320px;
  opacity: 1;
}

.nav__mobile ul {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  padding: var(--sp-4) 0 var(--sp-2);
  margin-top: var(--sp-3);
  border-top: 1px solid var(--border-default);
}

.nav__mobile-link {
  font-size: var(--fs-base);
  font-weight: 500;
  color: var(--txt-secondary);
  padding: var(--sp-2) 0;
  display: block;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav__mobile-link:hover { color: var(--clr-accent); }

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .nav { width: calc(100% - var(--sp-6)); }
  .nav__logo { display: none; }
}


/* ----------------------------------------
   FOOTER
   ---------------------------------------- */

.footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--sp-10) 0;
  margin-top: var(--sp-12);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
}

.footer__logo img {
  height: 80px;
  width: auto;
  display: block;
  filter: brightness(0) saturate(100%) invert(42%) sepia(90%) saturate(800%) hue-rotate(315deg) brightness(105%);
}

.footer__copy {
  font-size: var(--fs-sm);
  color: var(--txt-muted);
  max-width: none;
}

.footer__links {
  display: flex;
  gap: var(--sp-6);
}

.footer__links a {
  font-size: var(--fs-sm);
  color: var(--txt-muted);
  transition: color var(--dur-fast) var(--ease-out);
}
.footer__links a:hover { color: var(--clr-accent); }

@media (max-width: 768px) {
  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-4);
  }
}


/* ----------------------------------------
   PAGE HEADER — nadpis podstránek
   ---------------------------------------- */

.page-header {
  padding-top: calc(80px + var(--sp-16));
  padding-bottom: var(--sp-12);
  position: relative;
  overflow: hidden;
}

.page-header__mesh {
  position: absolute;
  inset: 0;
  background-image: var(--grad-mesh);
  pointer-events: none;
  z-index: 0;
}

.page-header__inner {
  position: relative;
  z-index: 1;
}

.page-header__title {
  font-size: var(--fs-4xl);
  margin-top: var(--sp-3);
}


/* ----------------------------------------
   PROGRESS BAR
   ---------------------------------------- */

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--grad-accent);
  z-index: calc(var(--z-nav) + 1);
  transform-origin: left;
  transition: width 0.1s linear;
}


/* ----------------------------------------
   SCROLL REVEAL
   ---------------------------------------- */

.scroll-reveal,
.stagger-child {
  opacity: 0;
  transform: translateY(32px);
}


/* ----------------------------------------
   SHARED JS — shared.js
   ---------------------------------------- */