@media (max-width: 900px) {
  html {
    scroll-padding-top: 92px;
  }

  body {
    padding-top: 0;
  }

  .site-header {
    top: 0;
    padding-top: env(safe-area-inset-top);
  }

  .site-header__inner {
    width: min(calc(100% - 32px), 560px);
    min-height: 68px;
    gap: 16px;
    padding: 0 12px 0 16px;
  }
  .site-nav {
    display: none;
  }

  .site-logo {
    flex-basis: 138px;
    width: 138px;
  }

  .header-cta {
    min-height: 44px;
    gap: 10px;
    padding: 0 8px 0 16px;
    border-radius: 15px;
  }

  .header-cta__text {
    font-size: 11px;
  }

  .header-cta__icon {
    width: 30px;
    height: 30px;
  }

  .header-cta__svg {
    width: 15px;
    height: 15px;
  }

  .mobile-menu-toggle {
    display: inline-flex;
    width: 44px;
    height: 44px;
    flex: 0 0 auto;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 7px;
    border: 1px solid rgba(140, 255, 26, 0.28);
    border-radius: 50%;
    background: rgba(4, 10, 7, 0.54);
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.06),
      0 0 18px rgba(140, 255, 26, 0.08);
    transition:
      border-color 220ms var(--ease-out),
      box-shadow 220ms var(--ease-out),
      transform 220ms var(--ease-out);
  }

  .mobile-menu-toggle span {
    width: 16px;
    height: 1px;
    background: var(--color-accent);
    box-shadow: 0 0 10px rgba(140, 255, 26, 0.36);
    transition:
      transform 220ms var(--ease-out),
      opacity 220ms var(--ease-out);
  }

  body.mobile-menu-open .mobile-menu-toggle {
    border-color: rgba(140, 255, 26, 0.52);
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.08),
      0 0 26px rgba(140, 255, 26, 0.16);
  }

  body.mobile-menu-open .mobile-menu-toggle span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  body.mobile-menu-open .mobile-menu-toggle span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .mobile-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    left: 0;
    z-index: 30;
    display: block;
    padding: 12px;
    border: 1px solid rgba(140, 255, 26, 0.28);
    border-radius: 22px;
    background:
      radial-gradient(circle at 50% 0%, rgba(140, 255, 26, 0.12), transparent 42%),
      linear-gradient(180deg, rgba(6, 16, 10, 0.94), rgba(1, 5, 3, 0.88));
    box-shadow:
      0 24px 70px rgba(0, 0, 0, 0.58),
      0 0 36px rgba(140, 255, 26, 0.08),
      inset 0 1px 0 rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(20px);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px) scale(0.985);
    transform-origin: top center;
    transition:
      opacity 220ms var(--ease-out),
      transform 220ms var(--ease-out);
  }

  .mobile-menu.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .mobile-menu__nav {
    display: grid;
    gap: 8px;
  }

  .mobile-menu__link {
    position: relative;
    display: flex;
    min-height: 54px;
    align-items: center;
    justify-content: center;
    padding: 0 18px;
    border: 1px solid rgba(255, 255, 255, 0.055);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.025);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
    color: rgba(244, 247, 242, 0.78);
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.02em;
    text-decoration: none;
    text-align: center;
    transition:
      color 180ms var(--ease-out),
      background 180ms var(--ease-out),
      border-color 180ms var(--ease-out),
      box-shadow 180ms var(--ease-out),
      transform 180ms var(--ease-out);
  }

  .mobile-menu__link::after {
    position: absolute;
    bottom: 10px;
    left: 50%;
    width: 42px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    content: "";
    opacity: 0;
    transform: translateX(-50%) scaleX(0.65);
    transform-origin: center;
    transition:
      opacity 180ms var(--ease-out),
      transform 180ms var(--ease-out);
  }

  .mobile-menu__link:hover,
  .mobile-menu__link:focus-visible {
    color: #f4f7f2;
    background: rgba(140, 255, 26, 0.08);
    border-color: rgba(140, 255, 26, 0.2);
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.06),
      0 0 20px rgba(140, 255, 26, 0.08);
    transform: translateY(-1px);
  }

  .mobile-menu__link.is-active,
  .mobile-menu__link[aria-current="page"] {
    color: var(--color-accent);
    border-color: rgba(140, 255, 26, 0.28);
    background:
      linear-gradient(180deg, rgba(140, 255, 26, 0.12), rgba(140, 255, 26, 0.045));
    box-shadow:
      0 0 26px rgba(140, 255, 26, 0.1),
      inset 0 1px 0 rgba(255, 255, 255, 0.07);
  }

  .mobile-menu__link.is-active::after,
  .mobile-menu__link[aria-current="page"]::after,
  .mobile-menu__link:hover::after,
  .mobile-menu__link:focus-visible::after {
    opacity: 0.85;
    transform: translateX(-50%) scaleX(1);
  }
}

@media (max-width: 520px) {
  .header-cta {
    display: none;
  }

  .site-logo {
    flex-basis: 122px;
    width: 122px;
  }

  .mobile-menu {
    border-radius: 16px;
  }
}