/* ============================================
   SLACKLINE HROU — Navigace
   ============================================ */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid transparent;
  padding: 20px 0;
  transition: padding var(--transition-normal), background var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-fast);
}

.site-nav.scrolled {
  background: var(--color-white);
  border-bottom-color: var(--color-beige-dark);
  padding: 10px 0;
  box-shadow: 0 4px 24px rgba(74,32,18,0.10);
}

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

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}
.nav-logo:hover { opacity: 0.85; }

.nav-logo-img {
  height: 64px;
  width: auto;
  display: block;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-xl);
  color: var(--color-brown);
  line-height: 1.1;
  text-transform: uppercase;
}
.nav-logo-text span { color: var(--color-green); }

/* ── Hlavní menu ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links > li {
  position: relative;
}

.nav-links a,
.nav-dropdown-trigger {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active,
.nav-dropdown-trigger:hover,
.nav-dropdown-trigger.active {
  background: var(--color-green-pale);
  color: var(--color-green-dark);
}

/* ── Dropdown šipka ── */
.nav-arrow {
  width: 14px;
  height: 14px;
  color: currentColor;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.nav-item.has-dropdown:hover .nav-arrow,
.nav-item.has-dropdown.open .nav-arrow {
  transform: rotate(180deg);
}

/* ── Dropdown panel ── */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 280px;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 40px rgba(74, 32, 18, 0.14);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  border: 1px solid var(--color-beige-dark);
  z-index: 200;
}

/* Malá šipka nahoru */
.nav-dropdown::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  border: 8px solid transparent;
  border-top: 0;
  border-bottom-color: var(--color-beige-dark);
}
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top: 0;
  border-bottom-color: var(--color-white);
}

/* Otevřít dropdown na hover nebo JS .open */
.nav-item.has-dropdown:hover .nav-dropdown,
.nav-item.has-dropdown:focus-within .nav-dropdown,
.nav-item.has-dropdown.open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ── Dropdown položky ── */
.nav-dropdown-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
  text-decoration: none;
  color: inherit;
}
.nav-dropdown-item:hover {
  background: var(--color-green-pale);
}
.nav-dropdown-item:hover .nav-dropdown-title {
  color: var(--color-green-dark);
}

.nav-dropdown-icon {
  width: 44px;
  height: 44px;
  background: var(--color-beige);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  transition: background var(--transition-fast);
}
.nav-dropdown-item:hover .nav-dropdown-icon {
  background: var(--color-green-pale);
}

.nav-dropdown-title {
  display: block;
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-brown);
  transition: color var(--transition-fast);
}
.nav-dropdown-desc {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-light);
  margin-top: 2px;
  line-height: 1.4;
}

.nav-dropdown-divider {
  height: 1px;
  background: var(--color-beige-dark);
  margin: var(--space-1) var(--space-3);
}

/* ── Ikony sociální sítě ── */
.nav-social {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.nav-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-green);
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.nav-social a:hover {
  background: var(--color-green-pale);
  transform: scale(1.1);
}
.nav-social svg { width: 20px; height: 20px; }

/* ── CTA tlačítko v nav ── */
.nav-cta { flex-shrink: 0; }

/* ── Hamburger — mobil ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  position: relative;
}
.nav-hamburger:hover { background: var(--color-green-pale); }
.nav-hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--color-brown);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, background 0.3s ease;
}
.nav-hamburger.open span { background: var(--color-green-dark); }
.nav-hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ── Mobilní menu panel ── */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--color-cream-light);
  border-bottom: 1px solid var(--color-beige-dark);
  padding: var(--space-4) var(--space-4) var(--space-8);
  z-index: 999;
  flex-direction: column;
  gap: var(--space-1);
  box-shadow: var(--shadow-lg);
  max-height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}
.nav-mobile.open { display: flex; }

.nav-mobile > a {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.nav-mobile > a:hover { background: var(--color-green-pale); color: var(--color-green-dark); }

/* Mobilní dropdown – rozbalovací skupina */
.mobile-nav-group {
  display: flex;
  flex-direction: column;
}

.mobile-nav-group-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  font-family: inherit;
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
}
.mobile-nav-group-trigger:hover { background: var(--color-green-pale); }

.mobile-nav-group-trigger-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mobile-nav-arrow {
  width: 16px;
  height: 16px;
  color: var(--color-text-light);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}
.mobile-nav-group.open .mobile-nav-arrow { transform: rotate(180deg); }

.mobile-nav-sub {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: 0 var(--space-4) var(--space-2) calc(var(--space-4) + 26px);
}
.mobile-nav-group.open .mobile-nav-sub { display: flex; }

.mobile-nav-sub a {
  font-size: var(--text-base);
  color: var(--color-text-light);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
}
.mobile-nav-sub a:hover { background: var(--color-green-pale); color: var(--color-green-dark); }
.mobile-nav-icon,
.mobile-nav-sub-icon {
  width: 36px; height: 36px;
  background: var(--color-beige);
  border-radius: var(--radius-md);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.mobile-nav-divider {
  height: 1px;
  background: var(--color-beige-dark);
  margin: var(--space-2) var(--space-4);
}

.nav-mobile .mobile-social {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: 0 var(--space-4);
}
.nav-mobile .mobile-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-green);
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.nav-mobile .mobile-social a:hover {
  background: var(--color-green-pale);
  transform: scale(1.1);
}
.nav-mobile .mobile-social svg { width: 20px; height: 20px; }
.nav-mobile .mobile-cta {
  margin-top: var(--space-3);
  padding: 0 var(--space-2);
}
.nav-mobile .mobile-cta .btn { width: 100%; justify-content: center; }

/* ── Responzivita ── */
@media (max-width: 900px) {
  .nav-links,
  .nav-social { display: none; }
  .nav-hamburger { display: flex; }
  .nav-cta { display: none; }
}