/* ==========================================================================
   LAYOUT.CSS — Header, Footer, Grid System, Page Structure
   ========================================================================== */

/* --------------------------------------------------------------------------
   SITE HEADER
   -------------------------------------------------------------------------- */
.site-header {
	position:   sticky;
	top:        0;
	z-index:    1000;
	height:     var(--header-height);
	background: var(--color-bg-white);
	box-shadow: 0 1px 0 var(--color-border), 0 2px 8px rgba(0,0,0,.06);
	display:    flex;
	align-items: center;
}

.header-inner {
	display:         flex;
	align-items:     center;
	justify-content: space-between;
	gap:             24px;
	width:           100%;
}

.site-branding a { display: flex; align-items: center; }

.custom-logo {
	height:    52px;
	width:     auto;
	max-width: 180px;
	object-fit: contain;
}

/* Desktop nav */
.main-navigation { display: flex; align-items: center; gap: 8px; }

.nav-menu {
	display:     flex;
	align-items: center;
	gap:         4px;
	list-style:  none;
}

.nav-menu li a {
	display:       block;
	padding:       8px 14px;
	font-size:     .9rem;
	font-weight:   500;
	color:         var(--color-text-primary);
	border-radius: var(--radius-sm);
	letter-spacing: .2px;
	transition:    var(--transition);
}
.nav-menu li a:hover,
.nav-menu li.current-menu-item > a {
	color:      var(--color-primary);
	background: rgba(26,59,102,.07);
}
.nav-menu li.current-menu-item > a { font-weight: 700; }

.header-cta { margin-left: 16px; }

/* Hamburger (mobile only) */
.hamburger-btn {
	display:         none;
	flex-direction:  column;
	gap:             5px;
	background:      none;
	border:          none;
	padding:         8px;
	cursor:          pointer;
}
.hamburger-line {
	display:       block;
	width:         24px;
	height:        2px;
	background:    var(--color-primary);
	border-radius: 2px;
	transition:    var(--transition);
}

/* --------------------------------------------------------------------------
   MOBILE MENU OVERLAY
   -------------------------------------------------------------------------- */
.mobile-menu-overlay {
	position:   fixed;
	inset:      0;
	z-index:    2000;
	background: var(--color-primary);
	transform:  translateX(-100%);
	transition: transform .3s cubic-bezier(.4,0,.2,1);
	display:    flex;
	flex-direction: column;
}
.mobile-menu-overlay.is-open { transform: translateX(0); }

.mobile-menu-topbar {
	display:         flex;
	align-items:     center;
	justify-content: space-between;
	padding:         0 24px;
	height:          64px;
	border-bottom:   1px solid rgba(255,255,255,.15);
}
.mobile-menu-logo { height: 44px; width: auto; max-width: 130px; object-fit: contain; }

.mobile-menu-close {
	background:    rgba(255,255,255,.15);
	border:        none;
	border-radius: var(--radius-sm);
	width:         40px;
	height:        40px;
	display:       flex;
	align-items:   center;
	justify-content: center;
	color:         #fff;
}
.mobile-menu-close svg { width: 20px; height: 20px; }

.mobile-nav { flex: 1; overflow-y: auto; }
.mobile-nav-list { list-style: none; }
.mobile-nav-list li a {
	display:         flex;
	align-items:     center;
	justify-content: space-between;
	padding:         20px 24px;
	font-size:       1rem;
	font-weight:     500;
	color:           rgba(255,255,255,.9);
	border-bottom:   1px solid rgba(255,255,255,.12);
	transition:      var(--transition);
}
.mobile-nav-list li a:hover,
.mobile-nav-list li.current-menu-item > a {
	color: #fff;
	background: rgba(255,255,255,.08);
}
.mobile-nav-list li a svg { width: 16px; height: 16px; opacity: .5; }

.mobile-menu-cta-area {
	padding: 24px;
	display: flex;
	flex-direction: column;
	gap: 12px;
	border-top: 1px solid rgba(255,255,255,.15);
}
.mobile-cta-primary {
	display:         flex;
	align-items:     center;
	justify-content: center;
	gap:             8px;
	padding:         16px;
	background:      var(--color-accent);
	border-radius:   var(--radius-md);
	color:           #fff;
	font-weight:     700;
	font-size:       1rem;
}
.mobile-cta-primary:hover { background: var(--color-accent-light); color: #fff; }
.mobile-cta-primary svg { width: 20px; height: 20px; }

.mobile-hotline-row {
	display:     flex;
	align-items: center;
	gap:         12px;
}
.mobile-hotline-icon {
	width:           44px;
	height:          44px;
	background:      rgba(255,255,255,.15);
	border-radius:   50%;
	display:         flex;
	align-items:     center;
	justify-content: center;
	flex-shrink:     0;
}
.mobile-hotline-icon svg { width: 20px; height: 20px; color: #fff; }
.mobile-hotline-info { display: flex; flex-direction: column; }
.mobile-hotline-label { font-size: .75rem; color: rgba(255,255,255,.6); }
.mobile-hotline-number { font-size: 1.1rem; font-weight: 700; color: #fff; }

/* --------------------------------------------------------------------------
   MOBILE STICKY CTA BAR (bottom)
   -------------------------------------------------------------------------- */
.mobile-sticky-cta {
	display:  none;
	position: fixed;
	bottom:   0;
	left:     0;
	right:    0;
	z-index:  999;
	box-shadow: 0 -2px 12px rgba(0,0,0,.15);
}
.mobile-sticky-call,
.mobile-sticky-zalo {
	flex:            1;
	display:         flex;
	align-items:     center;
	justify-content: center;
	gap:             8px;
	padding:         14px 8px;
	font-weight:     700;
	font-size:       .9375rem;
}
.mobile-sticky-call {
	background: var(--color-primary);
	color:      #fff;
}
.mobile-sticky-zalo {
	background: #0068FF;
	color:      #fff;
}
.mobile-sticky-call svg,
.mobile-sticky-zalo svg { width: 18px; height: 18px; }

/* --------------------------------------------------------------------------
   SITE FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
	background: var(--color-primary-dark);
	color:      rgba(255,255,255,.8);
}

.footer-top { padding: 64px 0 56px; }

.footer-grid {
	display:   grid;
	grid-template-columns: 2fr 1fr 1fr 1.5fr;
	gap:       60px;
}

.footer-logo {
	height:    52px;
	width:     auto;
	max-width: 160px;
	object-fit: contain;
	margin-bottom: 16px;
	filter: brightness(0) invert(1);
}

.footer-desc {
	font-size:     .9375rem;
	line-height:   1.75;
	color:         rgba(255,255,255,.7);
	max-width:     300px;
	margin-bottom: 20px;
}

.footer-socials { display: flex; gap: 10px; }
.footer-socials a {
	width:           38px;
	height:          38px;
	background:      rgba(255,255,255,.1);
	border-radius:   50%;
	display:         flex;
	align-items:     center;
	justify-content: center;
	color:           rgba(255,255,255,.7);
	transition:      var(--transition);
}
.footer-socials a:hover { background: var(--color-accent); color: #fff; }
.footer-socials a svg { width: 17px; height: 17px; }

.footer-title {
	font-size:      .9375rem;
	font-weight:    700;
	text-transform: uppercase;
	letter-spacing: .8px;
	color:          #fff;
	margin-bottom:  20px;
}

.footer-menu { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-menu a {
	font-size:  .9375rem;
	color:      rgba(255,255,255,.7);
	transition: var(--transition);
}
.footer-menu a:hover { color: #fff; padding-left: 4px; }

.footer-contact { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.footer-contact li {
	display:     flex;
	align-items: flex-start;
	gap:         10px;
	font-size:   .9375rem;
	color:       rgba(255,255,255,.7);
	line-height: 1.5;
}
.footer-contact li svg {
	width:       16px;
	height:      16px;
	flex-shrink: 0;
	margin-top:  3px;
	color:       var(--color-accent);
}
.footer-contact a {
	color:      rgba(255,255,255,.7);
	transition: var(--transition);
}
.footer-contact a:hover { color: #fff; }

.footer-bottom {
	padding:    20px 0;
	border-top: 1px solid rgba(255,255,255,.1);
}
.footer-bottom-inner {
	display:         flex;
	align-items:     center;
	justify-content: space-between;
	gap:             16px;
	flex-wrap:       wrap;
}
.copyright {
	font-size: .875rem;
	color:     rgba(255,255,255,.5);
}
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a {
	font-size: .875rem;
	color:     rgba(255,255,255,.5);
}
.footer-bottom-links a:hover { color: #fff; }

/* --------------------------------------------------------------------------
   PAGE HERO (shared across all inner pages)
   -------------------------------------------------------------------------- */
.page-hero {
	position:        relative;
	height:          240px;
	display:         flex;
	align-items:     center;
	overflow:        hidden;
}
.page-hero__bg {
	position:   absolute;
	inset:      0;
	background-size:     cover;
	background-position: center;
	z-index:    0;
}
.page-hero__overlay {
	position:   absolute;
	inset:      0;
	background: linear-gradient(180deg, rgba(16,30,51,.88) 0%, rgba(16,30,51,.55) 100%);
	z-index:    1;
}
.page-hero__content {
	position:  relative;
	z-index:   2;
	width:     100%;
}
.page-hero__breadcrumb {
	display:     flex;
	align-items: center;
	gap:         6px;
	margin-bottom: 12px;
}
.page-hero__breadcrumb a,
.page-hero__breadcrumb span {
	font-size:  .8125rem;
	color:      rgba(255,255,255,.7);
}
.page-hero__breadcrumb a:hover { color: #fff; }
.page-hero__breadcrumb .sep svg { width: 12px; height: 12px; color: rgba(255,255,255,.4); }
.page-hero__breadcrumb .current { color: var(--color-accent); font-weight: 600; }
.page-hero__title {
	font-size:   2.75rem;
	font-weight: 800;
	color:       #fff;
	letter-spacing: -.5px;
	line-height: 1.1;
}
.page-hero__sub {
	font-size:   1.0625rem;
	color:       rgba(255,255,255,.85);
	margin-top:  8px;
}

/* --------------------------------------------------------------------------
   ARCHIVE BODY — 2-column layout
   -------------------------------------------------------------------------- */
.archive-body {
	display:   flex;
	gap:       32px;
	padding:   40px 0 64px;
}
.archive-sidebar {
	width:      var(--sidebar-width);
	flex-shrink: 0;
}
.archive-main { flex: 1; min-width: 0; }

/* --------------------------------------------------------------------------
   SINGLE BODY — 2-column layout
   -------------------------------------------------------------------------- */
.single-body {
	display:   flex;
	gap:       32px;
	padding:   40px 0 64px;
}
.single-main    { flex: 1; min-width: 0; }
.single-sidebar { width: 360px; flex-shrink: 0; }

.sticky-sidebar {
	position: sticky;
	top:      calc(var(--header-height) + 24px);
}

/* --------------------------------------------------------------------------
   DETAIL HEADER (Navy bg for BDS detail pages)
   -------------------------------------------------------------------------- */
.detail-header {
	background:  rgba(26,59,102,.96);
	height:      var(--header-height);
	display:     flex;
	align-items: center;
}
.detail-header .site-branding a,
.detail-header .nav-menu li a { color: rgba(255,255,255,.85); }
.detail-header .nav-menu li a:hover,
.detail-header .nav-menu li.current-menu-item > a { color: #fff; background: rgba(255,255,255,.1); }