.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: minmax(190px, 1fr) auto minmax(190px, 1fr);
  align-items: center;
  width: 100%;
  min-height: 72px;
  padding: 14px clamp(24px, 4vw, 64px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.site-header .logo {
  justify-self: start;
  margin: 0;
  font-size: 28px;
  line-height: 1;
}

.site-header .primary-nav {
  display: flex;
  grid-column: 2;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 2.5vw, 34px);
  margin: 0;
}

.site-header .primary-nav a {
  position: relative;
  margin: 0;
  color: var(--text-dim);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}

.site-header .primary-nav a:hover,
.site-header .primary-nav a.nav-active {
  color: var(--accent-light);
}

.site-header .primary-nav a::after {
  position: absolute;
  right: 50%;
  bottom: -7px;
  left: 50%;
  height: 2px;
  content: "";
  background: var(--accent);
  border-radius: 999px;
  transition: right 0.2s, left 0.2s;
}

.site-header .primary-nav a:hover::after,
.site-header .primary-nav a.nav-active::after {
  right: 18%;
  left: 18%;
}

.site-header .header-actions {
  display: flex;
  grid-column: 3;
  align-items: center;
  justify-self: end;
  gap: 9px;
  min-width: 0;
}

.site-header .lang-switch,
.site-header .header-action-link,
.site-header #nav-account > a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 5px 10px;
  margin: 0;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.site-header .lang-switch:hover,
.site-header .header-action-link:hover,
.site-header #nav-account > a:hover {
  color: var(--accent-light);
  background: var(--bg-card-hover);
  border-color: var(--accent);
}

.site-header .header-action-link.pro-link {
  color: #fff;
  background: linear-gradient(135deg, #8b5cf6, #6d28d9);
  border-color: transparent;
}

.site-header .avatar-wrap {
  display: inline-flex;
}

.site-header .avatar-circle {
  width: 32px;
  height: 32px;
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 12px 16px;
    padding: 12px 16px;
  }

  .site-header .logo {
    grid-column: 1;
    grid-row: 1;
    font-size: 23px;
  }

  .site-header .header-actions {
    grid-column: 2;
    grid-row: 1;
    gap: 6px;
  }

  .site-header .primary-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    gap: 0;
  }

  .site-header .primary-nav a {
    flex: 1;
    padding: 5px 8px;
    font-size: 13px;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding: 10px 12px;
  }

  .site-header .header-actions {
    gap: 4px;
  }

  .site-header .lang-switch,
  .site-header .header-action-link,
  .site-header #nav-account > a {
    min-height: 29px;
    padding: 4px 7px;
    font-size: 11px;
  }

  .site-header .logo {
    font-size: 21px;
  }
}