.header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(26px);
  -webkit-backdrop-filter: blur(26px);
  background: linear-gradient(to bottom, rgba(6, 6, 6, 0.82), rgba(6, 6, 6, 0.76));
  border-bottom: 1px solid rgba(148, 27, 48, 0.7);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.75);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  gap: var(--space-6);
}
.brand-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: radial-gradient(circle at 30% 10%, #f97373, transparent 55%), radial-gradient(circle at 80% 90%, #7f1d1d, transparent 60%), linear-gradient(135deg, #111111, #020617);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 1px rgba(248, 250, 252, 0.04), 0 18px 40px rgba(0, 0, 0, 0.85);
}
.brand-mark::before {
  content: "\2660";
  font-size: 1.1rem;
  color: #f9fafb;
  filter: drop-shadow(0 0 8px rgba(248, 250, 252, 0.55));
}
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.brand-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text);
  white-space: nowrap;
}
.brand-subtitle {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.badge-21 {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border-radius: 999px;
  background: linear-gradient(135deg, #dc2626, #7f1d1d);
  box-shadow: 0 0 0 1px rgba(248, 250, 252, 0.04), 0 18px 40px rgba(0, 0, 0, 0.85);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #f9fafb;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.badge-21::before {
  content: "21+";
  font-weight: 600;
  margin-right: 6px;
}
.badge-21::after {
  content: "Ve\00010der pouze pro dosp\00011bl\0000e9";
  font-weight: 500;
  opacity: 0.85;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.nav-link {
  padding: var(--space-3) var(--space-4);
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--color-text-muted);
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 16%;
  right: 16%;
  bottom: 6px;
  height: 1px;
  background: linear-gradient(90deg, transparent, #dc2626, transparent);
  opacity: 0;
  transform: scaleX(0.5);
  transform-origin: center;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}
.nav-link.is-active, .nav-link:hover {
  color: var(--color-text);
  border-color: rgba(220, 38, 38, 0.7);
  background: radial-gradient(circle at top, rgba(220, 38, 38, 0.12), rgba(12, 12, 12, 0.95));
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.85);
}
.nav-link.is-active::after, .nav-link:hover::after {
  opacity: 1;
  transform: scaleX(1);
}
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(220, 38, 38, 0.7);
  background: radial-gradient(circle at top, rgba(220, 38, 38, 0.16), rgba(12, 12, 12, 0.98));
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  gap: 4px;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}
.nav-toggle:hover {
  border-color: rgba(220, 38, 38, 1);
  background: radial-gradient(circle at top, rgba(220, 38, 38, 0.25), rgba(15, 15, 15, 0.98));
  transform: translateY(-1px);
}
.nav-toggle:active {
  transform: translateY(0);
}
.nav-toggle-bar {
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: #f9fafb;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
}
/* Cross transition when menu is open */
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}
.nav-toggle:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}


/* Fluid responsive updates */
@media(max-width: 1100px) {
  .badge-21::after {
    display: none;
  }
  .badge-21::before {
    margin-right: 0;
  }
  .site-nav {
    gap: var(--space-4);
  }
  .nav-list {
    gap: var(--space-2);
    font-size: 0.75rem;
  }
  .nav-link {
    padding: var(--space-2) var(--space-3);
  }
}

@media(max-width: 960px) {
  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-4);
    padding: var(--space-4);
    flex-direction: column;
    min-width: 230px;
    border-radius: 18px;
    background: radial-gradient(circle at 0 0, rgba(220, 38, 38, 0.18), transparent 65%), linear-gradient(135deg, rgba(15, 15, 15, 0.98), rgba(10, 10, 10, 0.98));
    border: 1px solid rgba(39, 39, 42, 0.9);
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.96);
  }
  .nav-list.is-open {
    display: flex;
  }
  .nav-list li {
    width: 100%;
  }
  .nav-link {
    display: block;
    width: 100%;
    text-align: left;
    padding: var(--space-3) var(--space-6);
  }
  .header-inner {
    justify-content: space-between;
    position: relative;
  }
  .site-nav {
    position: static;
  }
  .nav-toggle {
    display: inline-flex;
  }
}

@media(max-width: 480px) {
  .brand-subtitle {
    display: none;
  }
  .brand-title {
    font-size: 0.85rem;
    letter-spacing: 0.12em;
  }
  .brand-lockup {
    gap: var(--space-2);
  }
  .brand-mark {
    width: 28px;
    height: 28px;
  }
  .brand-mark::before {
    font-size: 0.95rem;
  }
}

@media(max-width: 300px) {
  .badge-21 {
    display: none;
  }
}