/* --- Hamburger button: hidden on desktop, shown on mobile --- */
.site-header {
  position: relative; /* anchors the button's absolute position */
}

.menu-toggle {
  display: none;
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  width: 30px;
  height: 22px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
}

.menu-toggle span {
  display: block;
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: #c5a35a;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-toggle span:nth-child(1) { top: 0; }
.menu-toggle span:nth-child(2) { top: 10px; }
.menu-toggle span:nth-child(3) { top: 20px; }

.menu-toggle.is-active span:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}
.menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-10px) rotate(-45deg);
}

/* ============================================================
   BREAKPOINT: tablets and phones
   ============================================================ */
@media (max-width: 768px) {

  .page {
    padding: 20px;
  }

  /* Site title: 3rem + 0.5em letter-spacing overflows badly */
  .website-title {
    font-size: 1.5rem;
    letter-spacing: 0.15em;
    padding: 0 12px;
  }

  .subtitle {
    font-size: 0.85rem;
    padding: 0 12px;
  }

  .site-header {
    padding: 20px 0;
  }

  /* Menu button drops into normal flow below the title/subtitle
     instead of floating over them — this guarantees no overlap
     no matter how many lines the title wraps to.
     top/right are explicitly cleared here — otherwise the base
     rule's absolute-positioning offsets (top: 50%; right: 16px)
     still nudge a relatively-positioned element off its normal spot. */
  .menu-toggle {
    display: block;
    position: relative;
    top: auto;
    right: auto;
    transform: none;
    margin: 16px auto 0;
  }

  /* Stack sidebar above content instead of side-by-side */
  .layout {
    flex-direction: column;
    gap: 0;
  }

  /* Sidebar becomes a collapsible panel, closed by default */
  .sidebar {
    display: none;
    width: 100%;
    border-right: none;
    padding-right: 0;
    padding-bottom: 16px;
    margin-bottom: 20px;
    border-bottom: 1px solid #3a3323;
  }

  .sidebar.open {
    display: block;
  }

  .wheel-link {
    margin-bottom: 16px;
  }

  .content-box {
    padding: 20px;
  }

  /* Gallery: 3 fixed columns is too cramped on a phone */
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid img {
    height: 130px;
  }

  /* Halt/warning page title has the same oversize problem as site title */
  .halt-title {
    font-size: 1.8rem;
  }

  .warning-container {
    margin: 2rem auto;
    padding: 0 12px;
  }
}

/* ============================================================
   BREAKPOINT: small phones
   ============================================================ */
@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: repeat(1, 1fr);
  }

  .website-title {
    font-size: 1.2rem;
    letter-spacing: 0.1em;
  }
}