.mobile-menu-overlay,
.mobile-menu-docs-nav {
  display: none;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: calc(var(--sp-z-header) + 1);
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--sp-color-text);
  transition:
    transform var(--sp-duration-moderate) var(--sp-ease-out),
    opacity var(--sp-duration-moderate) var(--sp-ease-out),
    background-color var(--sp-duration-fast) var(--sp-ease-out);
  border-radius: var(--sp-radius-xs);
}

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

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

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

body.menu-open {
  overflow: hidden;
}

@media (max-width: 900px) {
  .site-header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--sp-color-bg);
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: oklch(0.13 0.01 45 / 0.5);
    opacity: 0;
    visibility: hidden;
    transition:
      opacity var(--sp-duration-moderate) var(--sp-ease-out),
      visibility var(--sp-duration-moderate) var(--sp-ease-out);
    z-index: calc(var(--sp-z-header) - 2);
  }

  .mobile-menu-overlay.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav-links {
    display: flex;
    position: fixed;
    top: var(--sp-header-height);
    right: 0;
    left: auto;
    width: min(20rem, 85vw);
    height: calc(100dvh - var(--sp-header-height));
    border-left: 1px solid var(--sp-color-border-subtle);
    box-shadow: var(--sp-shadow-float);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--sp-color-bg);
    border-top: 1px solid var(--sp-color-border-subtle);
    padding: var(--sp-space-4) var(--sp-space-6) var(--sp-space-8);
    transform: translateX(100%);
    visibility: hidden;
    transition:
      transform var(--sp-duration-moderate) var(--sp-ease-out),
      visibility var(--sp-duration-moderate) var(--sp-ease-out);
    z-index: calc(var(--sp-z-header) - 1);
    overflow-y: auto;
  }

  .nav-links.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-links > a {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: var(--sp-space-2) 0;
    font-family: var(--sp-font-brand);
    font-size: var(--sp-text-xs);
    font-weight: var(--sp-font-bold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--sp-color-border-subtle);
    color: var(--sp-color-text-secondary);
    text-decoration: none;
    transition: color var(--sp-duration-fast) var(--sp-ease-out);
  }

  .nav-links > a:hover {
    color: var(--sp-color-text);
  }

  .nav-links .cta-button {
    margin-top: var(--sp-space-6);
    width: 100%;
    text-align: center;
    border-bottom: none;
    border-radius: var(--sp-radius-sm);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hamburger-line,
  .mobile-menu-overlay,
  .nav-links {
    transition: none;
  }
}