/* ==========================================================================
   02-header.css — Sekce A: hlavička, navigace, vyhledávání
   ========================================================================== */

.pk-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background-color: var(--pk-color-white);
  border-bottom: 1px solid #E3E9EE;
}

.pk-header__navbar {
  --bs-navbar-padding-y: 0;
  min-height: var(--pk-header-height);
}

/* --- Logo ---------------------------------------------------------------- */

.pk-header__brand {
  display: flex;
  flex-direction: column;
  padding: 0.55rem 0;
  margin-right: 1rem;
  text-decoration: none;
}

.pk-header__logo {
  font-family: var(--pk-font-serif);
  font-size: clamp(1.75rem, 1.1rem + 1.6vw, 2.625rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.005em;
  color: var(--pk-color-text);
}

.pk-header__tagline {
  margin-top: 0.4rem;
  font-size: 0.625rem;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pk-color-secondary);
}

/* --- Menu ---------------------------------------------------------------- */

.pk-header__menu .nav-link {
  --bs-nav-link-font-size: 0.75rem;
  --bs-nav-link-font-weight: 600;
  --bs-nav-link-color: var(--pk-color-primary);
  --bs-nav-link-hover-color: var(--pk-color-secondary);
  --bs-navbar-active-color: var(--pk-color-primary);
  position: relative;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.pk-header__menu .nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.25rem;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transition: transform var(--pk-transition);
}

.pk-header__menu .nav-link:hover::after, .pk-header__menu .nav-link:focus-visible::after, .pk-header__menu .nav-link.active::after {
  transform: scaleX(1);
}

/* Aktivní stránka (třída .active + aria-current="page") */

.pk-header__menu .nav-link.active {
  color: var(--pk-color-text);
}

/* --- Nástroje: hledání + hamburger ---------------------------------------- */

.pk-header__tools {
  gap: 0.25rem;
}

.pk-header__search-toggle {
  --bs-btn-padding-x: 0.6rem;
  --bs-btn-color: var(--pk-color-primary);
  --bs-btn-hover-color: var(--pk-color-secondary);
  --bs-btn-active-border-color: transparent;
  font-size: 1.15rem;
  line-height: 1;
}

.pk-header__toggler {
  --bs-navbar-toggler-border-color: var(--pk-color-border);
  --bs-navbar-toggler-border-radius: var(--pk-radius);
  --bs-navbar-toggler-padding-x: 0.55rem;
  --bs-navbar-toggler-padding-y: 0.45rem;
  --bs-navbar-toggler-focus-width: 0;
}

@media (max-width: 991.98px) {
  .pk-header__brand {
    margin-right: auto;
  }
}

@media (max-width: 991.98px) {
  .pk-header__menu {
    padding: 0.5rem 0 1rem;
    border-top: 1px solid var(--pk-color-border);
  }
}

@media (max-width: 991.98px) {
  .pk-header__menu .nav-link {
    padding: 0.85rem 0;
    font-size: 0.8125rem;
    border-bottom: 1px solid #EEF2F5;
  }
}

@media (max-width: 991.98px) {
  .pk-header__menu .nav-link::after {
    display: none;
  }
}

@media (min-width: 992px) {
  .pk-header__menu {
    gap: 1.75rem;
  }
}

@media (min-width: 992px) {
  .pk-header__menu .nav-link {
    padding-left: 0;
    padding-right: 0;
  }
}

@media (min-width: 992px) {
  .pk-header__tools {
    margin-left: 4.5rem;
  }
}

/* --- Panel vyhledávání --------------------------------------------------- */

.pk-search {
  background-color: var(--pk-color-soft);
  border-top: 1px solid var(--pk-color-border);
}

.pk-search__form {
  padding: 1.5rem 0 1.25rem;
}

.pk-search__label {
  font-size: var(--pk-fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--pk-ls-caps);
  text-transform: uppercase;
  color: var(--pk-color-secondary);
}

.pk-search__input {
  min-height: 52px;
  border-color: var(--pk-color-border);
  border-radius: var(--pk-radius);
  color: var(--pk-color-text);
}

.pk-search__input:focus {
  border-color: var(--pk-color-secondary);
  box-shadow: 0 0 0 3px rgba(81, 108, 131, 0.18);
}

.pk-search__help {
  margin-top: 0.5rem;
  font-size: var(--pk-fs-xs);
  color: var(--pk-color-text-secondary);
}

.pk-search__results {
  margin: 0.5rem 0 0;
}

.pk-search__results li + li {
  border-top: 1px solid var(--pk-color-border);
}

.pk-search__results a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  color: var(--pk-color-text);
  text-decoration: none;
}

.pk-search__results a:hover {
  color: var(--pk-color-secondary);
}

.pk-search__results small {
  font-size: 0.6875rem;
  letter-spacing: var(--pk-ls-caps);
  text-transform: uppercase;
  color: var(--pk-color-text-secondary);
  white-space: nowrap;
}

.pk-search__empty {
  padding: 0.6rem 0;
  font-size: var(--pk-fs-small);
  color: var(--pk-color-text-secondary);
}