.c-header {
  background: var(--c-black);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 4px solid var(--c-red);
}

.c-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  gap: 32px;
  /* Hlavička dostává víc prostoru než běžný obsah (1200px kontejner),
     aby se navigace s tlačítkem "Přihlášení / IS" nemačkala na značku. */
  max-width: 1440px;
}

.c-header__brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.c-header__logo {
  height: 68px;
  width: auto;
  object-fit: contain;
}

.c-header__logo--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 56px;
  width: 56px;
  border-radius: 50%;
  background: var(--c-red);
  color: var(--c-white);
  font-family: var(--font-heading);
  font-size: 1.2rem;
  letter-spacing: 0.02em;
}

.c-header__brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.c-header__brand-eyebrow {
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gray-mid);
}

.c-header__brand-name {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.25;
  white-space: nowrap;
}

.c-header__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.c-header__nav-link {
  color: var(--c-white);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 10px 16px;
  border-radius: var(--radius);
  /* Položky menu se nikdy nesmí zalomit doprostřed textu — když se řádek
     nevejde, přepne se hlavička na hamburger (viz responsive.css). */
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.c-header__nav-link:hover,
.c-header__nav-link:focus-visible {
  background: var(--c-red);
  color: var(--c-white);
}

.c-header__nav-link--active {
  background: var(--c-red);
}

.c-header__nav-link--is {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.55);
  margin-left: 6px;
}

.c-header__nav-link--is:hover,
.c-header__nav-link--is:focus-visible {
  border-color: var(--c-red);
}

.c-header__is-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: currentColor;
}

.c-header__toggle {
  display: none;
  background: var(--c-red);
  color: var(--c-white);
  border: none;
  font-family: var(--font-body);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  padding: 10px 14px;
  border-radius: var(--radius);
  cursor: pointer;
}