/* ==========================================================================
   Component: datpro_header
   White corporate header — logo / primary nav / search + language.
   Reused on every page. Set data-dp-active="<route key>" on the <header>
   to mark the current page in the nav.
   ========================================================================== */

.dp-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: #fff;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.dp-header.is-stuck {
  border-bottom-color: var(--dp-border);
  box-shadow: var(--shadow-xs);
}

.dp-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--sp-4);
  min-height: var(--header-h);
}

/* ---------- Logo ---------------------------------------------------------- */

.dp-logo {
  display: inline-flex;
  align-items: center;
  flex: none;
}

.dp-logo img {
  width: auto;
  height: 46px;
}

@media (max-width: 767px) {
  .dp-logo img {
    height: 40px;
  }
}

/* ---------- Primary navigation -------------------------------------------- */

.dp-nav {
  justify-self: center;
}

.dp-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 1.6vw, 1.75rem);
}

.dp-nav__link {
  position: relative;
  display: block;
  padding: 0.5rem 0.125rem;
  color: var(--dp-text-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-medium);
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.dp-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: var(--dp-blue);
  transform: scaleX(0);
  transition: transform var(--dur) var(--ease);
}

.dp-nav__link:hover {
  color: var(--dp-blue);
}

/* "page" marks the current page; "true" marks the current *section* — an
   article sits under /tin-tuc/, so the News item is highlighted without
   claiming to be the page itself. Both get the same treatment. */
.dp-nav__link[aria-current="page"],
.dp-nav__link[aria-current="true"] {
  color: var(--dp-blue);
  font-weight: var(--fw-semibold);
}

.dp-nav__link[aria-current="page"]::after,
.dp-nav__link[aria-current="true"]::after {
  transform: scaleX(1);
}

/* ---------- Products dropdown (desktop) ------------------------------------
   Unified with the "Tin tức" dropdown below on 2026-09-27, per user feedback
   ("đồng nhất lại cái phần thao tác... cũng cần phải giống pop up nó cũng
   phải giống với chỗ tin tức đấy"): "Sản phẩm" is a real link (click navigates
   straight to /san-pham/) and the platform list is a hover/focus-within
   convenience on top of that, same single-column popup as .dp-news-menu, no
   JS toggle. */

.dp-nav__item--products {
  position: relative;
}

/* 2026-10-09 redesign (client: "đẹp mắt và chuyên nghiệp cực kỳ chất"):
   a light glass mega-panel instead of the plain 320px list.
     - DATPRO ENTERPRISE (first item) is a featured full-width card in the
       brand blue — it is the platform, the six apps sit under it;
     - the apps form a 2-column grid, each mark painted in the app's OWN
       colours (keyed on href, so the copy-pasted header markup stays
       identical on every page). Names only — the one-line descriptions
       were dropped the same day (client: "to, rộng thô quá");
     - items rise in one after another when the panel opens.
   Interaction contract unchanged: pure :hover / :focus-within, no JS. */

.dp-products-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  z-index: var(--z-dropdown);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  width: 440px;
  margin-top: 10px;
  padding: 10px;
  background:
    radial-gradient(70% 60% at 0% 0%, rgba(147, 197, 253, 0.28), transparent 70%),
    radial-gradient(60% 60% at 100% 100%, rgba(196, 181, 253, 0.22), transparent 70%),
    rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 22px;
  box-shadow:
    0 40px 80px -30px rgba(15, 40, 90, 0.35),
    0 12px 28px -14px rgba(15, 40, 90, 0.18),
    0 0 0 1px rgba(15, 33, 64, 0.05),
    inset 0 1px 0 #fff;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px) scale(0.98);
  transform-origin: 50% 0;
  transition: opacity 220ms var(--ease), transform 260ms cubic-bezier(.2,.8,.2,1),
    visibility 220ms var(--ease);
}

/* invisible bridge over the 10px gap so the pointer never "falls off" */
.dp-products-menu::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -12px;
  height: 12px;
}

.dp-nav__item--products:hover .dp-products-menu,
.dp-nav__item--products:focus-within .dp-products-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0) scale(1);
}

.dp-products-menu__item {
  --c: #1d5ee8;
  --c2: #5aa2ff;
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease),
    box-shadow 200ms var(--ease), transform 200ms var(--ease);
}

/* each app's own colours (same pairs as the homepage app stage) */
.dp-products-menu__item[href*="datpro-enterprise"] { --c: #0b5fa8; --c2: #2f8cff; }
.dp-products-menu__item[href*="datcare-plus"] { --c: #0fa37f; --c2: #5fd3b0; }
.dp-products-menu__item[href*="dat-learn-language"] { --c: #4f46e5; --c2: #a78bfa; }
.dp-products-menu__item[href*="datedu-kids"] { --c: #ff8a1f; --c2: #2bb6f0; }
.dp-products-menu__item[href*="dat-car"] { --c: #1d5ee8; --c2: #5aa2ff; }
.dp-products-menu__item[href*="datlife"] { --c: #0b6e5c; --c2: #f2b51c; }
.dp-products-menu__item[href*="datwork"] { --c: #f26b1d; --c2: #ffa24a; }
.dp-products-menu__item[href*="dat-home"] { --c: #1f7a4d; --c2: #7cc89a; }

a.dp-products-menu__item:hover,
a.dp-products-menu__item:focus-visible {
  background: color-mix(in srgb, var(--c) 7%, #fff);
  border-color: color-mix(in srgb, var(--c) 22%, transparent);
  box-shadow: 0 14px 30px -18px color-mix(in srgb, var(--c) 70%, transparent);
  transform: translateY(-2px);
}

.dp-products-menu__icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c), var(--c2));
  color: #fff;
  box-shadow: 0 8px 18px -8px var(--c), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transition: transform 260ms cubic-bezier(.2,.8,.2,1);
}

a.dp-products-menu__item:hover .dp-products-menu__icon { transform: scale(1.08) rotate(-6deg); }

.dp-products-menu__icon svg {
  width: 16px;
  height: 16px;
}

.dp-products-menu__body {
  min-width: 0;
  flex: 1;
}

.dp-products-menu__name {
  display: block;
  color: var(--dp-text);
  font-size: var(--fs-sm);
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.dp-products-menu__desc {
  display: block;
  margin-top: 2px;
  color: var(--dp-text-muted);
  font-size: 0.8125rem;
  line-height: 1.35;
}

/* small arrow that slides in on hover */
.dp-products-menu__item::after {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  margin-right: 4px;
  border-top: 2px solid var(--c);
  border-right: 2px solid var(--c);
  transform: translateX(-6px) rotate(45deg);
  opacity: 0;
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

a.dp-products-menu__item:hover::after,
a.dp-products-menu__item:focus-visible::after {
  opacity: 1;
  transform: translateX(0) rotate(45deg);
}

/* featured platform card */
.dp-products-menu__item:first-child {
  grid-column: 1 / -1;
  padding: 10px 12px;
  margin-bottom: 2px;
  overflow: hidden;
  background: linear-gradient(120deg, #0b4f91 0%, #1d6fe0 55%, #4f9dff 100%);
  box-shadow: 0 18px 36px -20px rgba(11, 79, 145, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.dp-products-menu__item:first-child::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 120% at 100% 0%, rgba(255, 255, 255, 0.28), transparent 60%),
    linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px) 0 0 / 22px 22px,
    linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px) 0 0 / 22px 22px;
  pointer-events: none;
}
.dp-products-menu__item:first-child .dp-products-menu__icon {
  width: 34px;
  height: 34px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.35);
  box-shadow: none;
}
.dp-products-menu__item:first-child .dp-products-menu__name { color: #fff; }
.dp-products-menu__item:first-child .dp-products-menu__desc { color: rgba(255, 255, 255, 0.82); }
.dp-products-menu__item:first-child::after { border-color: #fff; opacity: 0.8; transform: rotate(45deg); }
a.dp-products-menu__item:first-child:hover,
a.dp-products-menu__item:first-child:focus-visible {
  background: linear-gradient(120deg, #0b4f91 0%, #1d6fe0 55%, #4f9dff 100%);
  border-color: transparent;
  box-shadow: 0 22px 40px -18px rgba(11, 79, 145, 0.9);
}

.dp-products-menu__all {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  margin-top: 4px;
  padding: 8px;
  border-radius: 10px;
  background: rgba(15, 33, 64, 0.04);
  color: var(--dp-blue);
  font-size: var(--fs-sm);
  font-weight: 700;
  transition: background-color 200ms var(--ease), color 200ms var(--ease);
}

.dp-products-menu__all:hover,
.dp-products-menu__all:focus-visible {
  background: var(--dp-blue);
  color: #fff;
}

/* items rise in one after another each time the panel opens */
@media (prefers-reduced-motion: no-preference) {
  .dp-products-menu > *,
  .dp-news-menu > * {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 260ms var(--ease), transform 320ms cubic-bezier(.2,.8,.2,1),
      background-color 200ms var(--ease), border-color 200ms var(--ease), box-shadow 200ms var(--ease);
  }
  .dp-nav__item--products:is(:hover, :focus-within) .dp-products-menu > *,
  .dp-nav__item--news:is(:hover, :focus-within) .dp-news-menu > * {
    opacity: 1;
    transform: none;
  }
  .dp-nav__item:is(:hover, :focus-within) :is(.dp-products-menu, .dp-news-menu) > :nth-child(2) { transition-delay: 40ms; }
  .dp-nav__item:is(:hover, :focus-within) :is(.dp-products-menu, .dp-news-menu) > :nth-child(3) { transition-delay: 70ms; }
  .dp-nav__item:is(:hover, :focus-within) :is(.dp-products-menu, .dp-news-menu) > :nth-child(4) { transition-delay: 100ms; }
  .dp-nav__item:is(:hover, :focus-within) :is(.dp-products-menu, .dp-news-menu) > :nth-child(5) { transition-delay: 130ms; }
  .dp-nav__item:is(:hover, :focus-within) :is(.dp-products-menu, .dp-news-menu) > :nth-child(6) { transition-delay: 160ms; }
  .dp-nav__item:is(:hover, :focus-within) :is(.dp-products-menu, .dp-news-menu) > :nth-child(7) { transition-delay: 190ms; }
  .dp-nav__item:is(:hover, :focus-within) :is(.dp-products-menu, .dp-news-menu) > :nth-child(n+8) { transition-delay: 220ms; }
  .dp-nav__item .dp-products-menu > a.dp-products-menu__item:hover,
  .dp-nav__item .dp-news-menu > a.dp-news-menu__item:hover { transition-delay: 0ms; }
  .dp-nav__item--products .dp-products-menu > a.dp-products-menu__item:hover { transform: translateY(-2px); }
}

/* ---------- News topics dropdown (desktop) --------------------------------
   Same interaction contract as .dp-products-menu above: "Tin tức" is a real
   link (data-route="news" still navigates on click) and the topic list is
   just a hover/focus convenience on top of that, not a second UI a user has
   to operate before they can reach the page. Pure CSS :hover/:focus-within —
   no JS toggle needed. Sub-item description text was removed 2026-09-27 per
   user feedback ("bỏ đi cái phần tích phụ đi... không cần") — name + icon only. */

.dp-nav__item--news {
  position: relative;
}

.dp-news-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  z-index: var(--z-dropdown);
  width: 300px;
  margin-top: 10px;
  padding: 10px;
  background:
    radial-gradient(80% 60% at 0% 0%, rgba(147, 197, 253, 0.25), transparent 70%),
    rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 20px;
  box-shadow:
    0 40px 80px -30px rgba(15, 40, 90, 0.35),
    0 12px 28px -14px rgba(15, 40, 90, 0.18),
    0 0 0 1px rgba(15, 33, 64, 0.05),
    inset 0 1px 0 #fff;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease);
}

.dp-nav__item--news:hover .dp-news-menu,
.dp-nav__item--news:focus-within .dp-news-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dp-news-menu__item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0.625rem;
  border-radius: var(--r-md);
  transition: background-color var(--dur) var(--ease);
}

.dp-news-menu::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -12px;
  height: 12px;
}

.dp-news-menu__item:hover,
.dp-news-menu__item:focus-visible {
  background: rgba(29, 94, 232, 0.07);
}

.dp-news-menu__icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: linear-gradient(135deg, #1d5ee8, #5aa2ff);
  color: #fff;
  box-shadow: 0 8px 18px -8px #1d5ee8, inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.dp-news-menu__icon svg {
  width: 18px;
  height: 18px;
}

.dp-news-menu__body {
  min-width: 0;
}

.dp-news-menu__name {
  display: block;
  color: var(--dp-text);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  line-height: 1.4;
}

/* ---------- Header actions ------------------------------------------------ */

.dp-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.dp-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  color: var(--dp-text-muted);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.dp-icon-btn:hover {
  background: var(--dp-surface);
  color: var(--dp-blue);
}

.dp-icon-btn svg {
  width: 20px;
  height: 20px;
}

.dp-header__divider {
  width: 1px;
  height: 22px;
  background: var(--dp-border);
}

/* ---------- Search -------------------------------------------------------- */

.dp-search {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  /* keeps the field aligned with .dp-container at every viewport */
  padding-inline: max(
    var(--container-pad),
    calc(50vw - var(--container-max) / 2 + var(--container-pad))
  );
  background: #fff;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.dp-search.is-open {
  opacity: 1;
  visibility: visible;
}

.dp-search__field {
  flex: 1;
  min-width: 0;
  height: 44px;
  padding: 0 1rem;
  border: 1px solid var(--dp-border-strong);
  border-radius: var(--r-md);
  background: var(--dp-surface);
  color: var(--dp-text);
  font: inherit;
}

.dp-search__field::placeholder {
  color: var(--dp-text-subtle);
}

.dp-search__field:focus {
  outline: none;
  border-color: var(--dp-blue);
  background: #fff;
}

.dp-header__bar {
  position: relative;
}

/* ---------- Mobile trigger ------------------------------------------------ */

.dp-burger {
  display: none;
}

.dp-burger__box {
  position: relative;
  width: 20px;
  height: 14px;
}

.dp-burger__box span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease);
}

.dp-burger__box span:nth-child(1) {
  top: 0;
}
.dp-burger__box span:nth-child(2) {
  top: 6px;
}
.dp-burger__box span:nth-child(3) {
  top: 12px;
}

.dp-burger[aria-expanded="true"] .dp-burger__box span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.dp-burger[aria-expanded="true"] .dp-burger__box span:nth-child(2) {
  opacity: 0;
}
.dp-burger[aria-expanded="true"] .dp-burger__box span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- Mobile drawer ------------------------------------------------- */

.dp-drawer {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: var(--z-drawer);
  display: flex;
  flex-direction: column;
  background: #fff;
  padding: var(--sp-5) var(--container-pad) calc(var(--sp-8) + env(safe-area-inset-bottom));
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease);
}

.dp-drawer.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.dp-drawer__list {
  display: flex;
  flex-direction: column;
}

.dp-drawer__link {
  display: block;
  padding: 0.9375rem 0;
  border-bottom: 1px solid var(--dp-border);
  color: var(--dp-text);
  font-size: 1.0625rem;
  font-weight: var(--fw-medium);
}

.dp-drawer__link[aria-current="page"],
.dp-drawer__link[aria-current="true"] {
  color: var(--dp-blue);
  font-weight: var(--fw-semibold);
}

/* ---------- Products accordion (mobile drawer) -----------------------------
   Tap "Sản phẩm" expands in place — it never navigates on its own tap, only
   the "Xem tất cả sản phẩm" link at the bottom does. */

.dp-drawer__accordion-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  border-bottom: 1px solid var(--dp-border);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.dp-drawer__accordion-toggle .dp-nav__chevron {
  width: 16px;
  height: 16px;
  color: var(--dp-text-subtle);
  transition: transform var(--dur) var(--ease);
}

.dp-drawer__accordion-toggle[aria-expanded="true"] .dp-nav__chevron {
  transform: rotate(180deg);
}

.dp-drawer__submenu {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows var(--dur) var(--ease);
}

.dp-drawer__submenu.is-open {
  grid-template-rows: 1fr;
}

.dp-drawer__submenu > ul {
  min-height: 0;
}

.dp-drawer__sublink {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  min-height: 44px;
  padding: 0.625rem 0 0.625rem 0.75rem;
  color: var(--dp-text-body);
  font-size: 0.9375rem;
}

.dp-drawer__sublink--pending {
  color: var(--dp-text-subtle);
}

.dp-drawer__sublink--all {
  color: var(--dp-blue);
  font-weight: var(--fw-semibold);
  padding-left: 0;
}

.dp-drawer__foot {
  margin-top: var(--sp-8);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.dp-drawer__search {
  display: flex;
  gap: var(--sp-2);
}

body.dp-no-scroll {
  overflow: hidden;
}

/* ---------- Breakpoints --------------------------------------------------- */

@media (max-width: 1023px) {
  .dp-header__inner {
    grid-template-columns: auto 1fr;
  }

  .dp-nav,
  .dp-header__divider,
  .dp-header__search-toggle {
    display: none;
  }

  .dp-header__actions {
    justify-self: end;
  }

  .dp-burger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--r-sm);
    color: var(--dp-text);
  }

  /* Mobile Portrait Pass: any .dp-icon-btn still reachable at this width
     (the search-close button inside the mobile search overlay) meets the
     44px touch floor. Scoped to this max-width block only, so the desktop
     search-toggle instance (≥1024px) is untouched. */
  .dp-icon-btn {
    width: 44px;
    height: 44px;
  }
}

@media (min-width: 1024px) {
  .dp-drawer {
    display: none;
  }
}