:root {
  --oc-w: min(86vw, 360px);
  --oc-z: 10000;
  --oc-border: rgba(0, 0, 0, 0.08);
  --oc-backdrop: rgba(0, 0, 0, 0.45);
  --oc-shadow: 0 20px 40px rgba(0, 0, 0, 0.22);
}

/* Nút mở */
.oc-toggle {
  display: none; /* hidden by default on desktop */
  place-items: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.oc-toggle svg {
  display: block;
}

/* Show hamburger under 1080px */
@media (max-width: 1080px) {
  .oc-toggle {
    display: inline-grid;
  }
}

/* Backdrop */
.oc-backdrop {
  position: fixed;
  inset: 0;
  background: var(--oc-backdrop);
  z-index: calc(var(--oc-z) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.oc-backdrop[hidden] {
  display: none !important;
}

/* Panel */
.oc {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--oc-w);
  height: 100dvh;
  background: #fff;
  color: #111;
  z-index: var(--oc-z);
  border-left: 1px solid var(--oc-border);
  box-shadow: var(--oc-shadow);
  transform: translateX(100%);
  transition: transform 0.28s ease;
  display: grid;
  grid-template-rows: auto 1fr auto;
  outline: none;
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

.oc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--oc-border);
}

.oc-title {
  margin: 0;
  font-weight: 600;
}

.oc-close {
  width: 40px;
  height: 40px;
  border: 0;
  background: transparent;
  border-radius: 10px;
  cursor: pointer;
}

.oc-nav {
  overflow: auto;
  padding: 12px 8px;
}

.oc-menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

.oc-menu > li > a {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
}

.oc-menu > li > a:hover,
.oc-menu > li > a:focus-visible {
  background: rgba(0, 0, 0, 0.05);
}

/* Submenu toggle “v” */
.oc-menu .menu-item-has-children {
  position: relative;
}

.oc-menu .menu-item-has-children > a {
  padding-right: 42px;
}

.oc-subtoggle {
  position: absolute;
  right: 8px;
  top: 8px;
  width: 28px;
  height: 28px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.oc-subtoggle .caret {
  transition: transform 0.2s ease;
}

.oc-menu .sub-menu {
  display: none !important;
  margin: 0;
  padding: 6px 0 6px 12px;
  list-style: none;
  border-left: 2px solid #f0f0f0;
}

.oc-menu .menu-item-has-children.is-open > .sub-menu {
  display: block !important;
}

.menu-item-has-children.is-open > .oc-subtoggle .caret {
  transform: rotate(180deg);
}

/* Footer: hàng cờ */
.oc-foot {
  padding: 12px 16px;
  border-top: 1px solid var(--oc-border);
  display: flex;
  justify-content: flex-start;
}

.oc-lang-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.oc-lang-flag {
  display: inline-flex;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid #e5e7eb;
  align-items: center;
  justify-content: center;
}

.oc-lang-flag img {
  width: 20px;
  height: auto;
  display: block;
}

.oc-lang-flag.is-active {
  outline: 2px solid #ddd;
}

/* Khi mở */
.has-oc-open {
  overflow: hidden;
  touch-action: none;
}

.has-oc-open .oc {
  transform: translateX(0);
}

.has-oc-open .oc-backdrop {
  opacity: 1;
  pointer-events: auto;
}