.mobile-menu-toggle,
.mobile-menu {
  display: none;
}

@media (max-width: 850px) {
  .site-header {
    justify-content: space-between;
    gap: 14px;
  }

  .site-header > .header-actions {
    display: none;
  }

  .mobile-menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    padding: 10px 13px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(17, 24, 39, .92);
    color: var(--text);
    font: inherit;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
  }

  .mobile-menu-icon {
    position: relative;
    width: 18px;
    height: 12px;
    border-top: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
  }

  .mobile-menu-icon::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 4px;
    border-top: 2px solid currentColor;
  }

  .mobile-menu-toggle[aria-expanded="true"] .mobile-menu-icon {
    border: 0;
  }

  .mobile-menu-toggle[aria-expanded="true"] .mobile-menu-icon::before,
  .mobile-menu-toggle[aria-expanded="true"] .mobile-menu-icon::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 5px;
    border-top: 2px solid currentColor;
    transform: rotate(45deg);
  }

  .mobile-menu-toggle[aria-expanded="true"] .mobile-menu-icon::after {
    transform: rotate(-45deg);
  }

  .mobile-menu:not([hidden]) {
    display: block;
    position: absolute;
    top: calc(100% + 10px);
    left: 14px;
    right: 14px;
    padding: 14px;
    border: 1px solid rgba(148, 163, 184, .2);
    border-radius: 16px;
    background: rgba(12, 20, 34, .98);
    box-shadow: 0 24px 70px rgba(0, 0, 0, .48);
    backdrop-filter: blur(20px);
  }

  .mobile-menu nav {
    display: grid;
    gap: 3px;
    color: var(--text);
    font-size: 15px;
  }

  .mobile-menu nav a {
    padding: 13px 12px;
    border-radius: 9px;
  }

  .mobile-menu nav a:hover {
    background: rgba(255, 255, 255, .05);
    color: var(--accent);
  }

  .mobile-menu-footer {
    display: grid;
    grid-template-columns: minmax(90px, .7fr) 1fr 1fr;
    gap: 9px;
    margin-top: 10px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
  }

  .mobile-menu-footer .button {
    display: flex;
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
  }

  .mobile-language-form select {
    width: 100%;
    max-width: none;
    height: 44px;
    background: rgba(4, 10, 20, .68);
    color: var(--text);
  }
}

@media (max-width: 440px) {
  .brand {
    font-size: 15px;
  }

  .brand-mark {
    width: 28px;
    height: 28px;
  }

  .mobile-menu-toggle {
    padding: 9px 11px;
  }

  .mobile-menu-footer {
    grid-template-columns: 1fr 1fr;
  }

  .mobile-language-form {
    grid-column: 1 / -1;
  }
}