/**
 * header.css — BEM: header, header__*, header--*
 */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-bg-primary);
  box-shadow: var(--shadow-header);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.9rem;
}

.header__logo {
  flex-shrink: 0;
  display: inline-flex;
}

.header__logo img {
  width: clamp(110px, 12vw, 150px);
  height: auto;
}

/* === Desktop nav === */
.header__nav-list {
  display: none;
}

.header__nav-link {
  position: relative;
  display: inline-flex;
  padding: 0.5rem 0;
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-small);
  text-decoration: none;
  transition: color var(--transition-base);
}

.header__nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-heading-gold);
  transition: width var(--transition-base);
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--color-heading-gold);
}

.header__nav-link:hover::after,
.header__nav-link--active::after {
  width: 100%;
}

.header__mobile-actions {
  display: none;
}

/* === Actions (desktop) === */
.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header__flag {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
}

.header__login-btn,
.header__register-btn {
  display: none;
  padding: 0.6rem 1.25rem;
  font-size: var(--font-size-small);
}

/* === Burger === */
.header__burger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-card);
}

.header__burger-line {
  width: 22px;
  height: 2px;
  background: var(--color-heading-gold);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(2) {
  opacity: 0;
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* === Mobile nav panel === */
@media (max-width: 767px) {
  .header__nav {
    position: fixed;
    inset: 0;
    top: 0;
    transform: translateX(100%);
    visibility: hidden;
    width: min(85vw, 360px);
    margin-left: auto;
    background: var(--color-bg-dark);
    padding: 5.5rem 1.5rem 2rem;
    overflow-y: auto;
    transition: transform var(--transition-slow), visibility var(--transition-slow);
  }

  .header__nav--open {
    transform: translateX(0);
    visibility: visible;
  }

  .header__nav-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }

  .header__nav-link {
    font-size: 1.05rem;
    display: block;
  }

  .header__mobile-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 2rem;
  }
}

/* === Desktop layout === */
@media (min-width: 768px) {
  .header__nav {
    display: flex;
    align-items: center;
  }

  .header__nav-list {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 2vw, 2rem);
  }

  .header__burger {
    display: none;
  }

  .header__login-btn,
  .header__register-btn {
    display: inline-flex;
  }
}