/* ============================================================
   HEADER.CSS — BangDinhNhom Theme
   Top Bar | Site Header | Navigation | Mobile Nav | Floating CTA
   ============================================================ */

/* ── TOP BAR ─────────────────────────────────────────────── */
.top-bar {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,.75);
  font-size: .75rem;
  font-family: var(--font-body);
  letter-spacing: .02em;
  line-height: 1;
  position: relative;
  z-index: 200;
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
  gap: 1rem;
}

.top-bar-contact {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.top-bar-contact a {
  display: flex;
  align-items: center;
  gap: .35rem;
  color: rgba(255,255,255,.75);
  text-decoration: none;
  transition: color .2s;
  white-space: nowrap;
}

.top-bar-contact a:hover { color: #fff; }

.top-bar-contact svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  opacity: .8;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.top-bar-socials {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.top-bar-socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  color: rgba(255,255,255,.75);
  transition: background .2s, color .2s;
}

.top-bar-socials a:hover {
  background: var(--color-accent);
  color: #fff;
}

.top-bar-socials svg {
  width: 11px;
  height: 11px;
}

.top-bar-cert {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .7rem;
  color: rgba(255,255,255,.6);
  border-left: 1px solid rgba(255,255,255,.15);
  padding-left: 1rem;
}

.top-bar-cert svg {
  width: 12px;
  height: 12px;
  color: var(--color-accent);
}

/* ── SITE HEADER ─────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  box-shadow: 0 1px 0 rgba(0,0,0,.06);
  transition: box-shadow .3s, background .3s;
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,.1);
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 68px;
  gap: 2rem;
}

/* ── LOGO ────────────────────────────────────────────────── */
.site-logo {
  flex-shrink: 0;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: .6rem;
}

.site-logo img {
  height: 44px;
  width: auto;
  display: block;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-text-main {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.logo-text-sub {
  font-size: .6rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-family: var(--font-body);
}

/* ── MAIN NAVIGATION ─────────────────────────────────────── */
.main-nav {
  flex: 1;
}

.main-nav > ul {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: .25rem;
}

.main-nav > ul > li {
  position: relative;
}

.main-nav > ul > li > a {
  display: flex;
  align-items: center;
  gap: .3rem;
  padding: .5rem .75rem;
  font-family: var(--font-body);
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color .2s, background .2s;
  white-space: nowrap;
}

.main-nav > ul > li > a:hover,
.main-nav > ul > li.current-menu-item > a,
.main-nav > ul > li.current-menu-ancestor > a {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.main-nav > ul > li > a .nav-arrow {
  width: 12px;
  height: 12px;
  opacity: .5;
  transition: transform .2s;
}

.main-nav > ul > li:hover > a .nav-arrow {
  transform: rotate(180deg);
  opacity: 1;
}

/* Mega / dropdown indicator */
.main-nav > ul > li.menu-item-has-children > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  opacity: .5;
  margin-left: .2rem;
  transition: transform .2s, opacity .2s;
}

.main-nav > ul > li.menu-item-has-children:hover > a::after {
  transform: rotate(180deg);
  opacity: 1;
}

/* ── DROPDOWN ────────────────────────────────────────────── */
.main-nav ul ul {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 220px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: .5rem 0;
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .2s, visibility .2s, transform .2s;
  z-index: 500;
}

.main-nav ul li:hover > ul {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.main-nav ul ul li a {
  display: block;
  padding: .5rem 1rem;
  font-size: .84rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: color .15s, background .15s, padding-left .15s;
  border-left: 3px solid transparent;
}

.main-nav ul ul li a:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  padding-left: 1.25rem;
  border-left-color: var(--color-primary);
}

/* Second level dropdown (nested) */
.main-nav ul ul ul {
  top: -0.5rem;
  left: calc(100% + 4px);
}

/* ── HEADER CTA ──────────────────────────────────────────── */
.header-cta {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
  margin-left: auto;
}

.header-hotline {
  display: flex;
  align-items: center;
  gap: .5rem;
  text-decoration: none;
}

.header-hotline-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  animation: ring-pulse 2s ease-in-out infinite;
}

.header-hotline-icon svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

@keyframes ring-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(15,76,129,.3); }
  50% { box-shadow: 0 0 0 6px rgba(15,76,129,0); }
}

.header-hotline-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header-hotline-label {
  font-size: .65rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-family: var(--font-body);
}

.header-hotline-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary);
  letter-spacing: .02em;
}

.header-quote-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem 1.1rem;
  background: var(--color-accent);
  color: #fff;
  font-size: .82rem;
  font-weight: 700;
  font-family: var(--font-body);
  text-decoration: none;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background .2s, transform .1s;
}

.header-quote-btn:hover {
  background: #e65100;
  transform: translateY(-1px);
  color: #fff;
}

.header-quote-btn svg {
  width: 14px;
  height: 14px;
}

/* ── MOBILE TOGGLE ───────────────────────────────────────── */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: .5rem;
  border: none;
  background: none;
  margin-left: auto;
  border-radius: var(--radius-sm);
  transition: background .2s;
}

.mobile-menu-toggle:hover { background: var(--color-bg); }

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform .3s, opacity .3s, width .3s;
  transform-origin: center;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
  width: 0;
}
.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── MOBILE NAV OVERLAY ──────────────────────────────────── */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  pointer-events: none;
}

.mobile-nav-overlay.active { pointer-events: all; }

.mobile-nav-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.5);
  opacity: 0;
  transition: opacity .3s;
  cursor: pointer;
}

.mobile-nav-overlay.active .mobile-nav-backdrop { opacity: 1; }

.mobile-nav-panel {
  position: relative;
  width: 300px;
  max-width: 85vw;
  height: 100%;
  background: #fff;
  box-shadow: var(--shadow-xl);
  transform: translateX(-100%);
  transition: transform .3s cubic-bezier(.25,.46,.45,.94);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.mobile-nav-overlay.active .mobile-nav-panel { transform: translateX(0); }

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.mobile-nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-primary);
  text-transform: uppercase;
}

.mobile-nav-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--color-bg);
  border-radius: 50%;
  cursor: pointer;
  transition: background .2s;
}

.mobile-nav-close:hover { background: var(--color-border); }

.mobile-nav-close svg { width: 16px; height: 16px; }

.mobile-nav-contact {
  padding: .75rem 1.25rem;
  background: var(--color-primary-bg);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.mobile-nav-contact a {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--color-primary);
  font-size: .84rem;
  font-weight: 600;
  text-decoration: none;
  padding: .25rem 0;
}

.mobile-nav-contact svg { width: 14px; height: 14px; }

.mobile-nav-body {
  flex: 1;
  overflow-y: auto;
  padding: .5rem 0;
}

.mobile-nav-body ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav-body li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1.25rem;
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: color .15s, background .15s, border-color .15s;
}

.mobile-nav-body li a:hover,
.mobile-nav-body li.current-menu-item > a {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border-left-color: var(--color-primary);
}

.mobile-nav-body li a svg {
  width: 14px;
  height: 14px;
  opacity: .4;
  transition: transform .2s;
}

.mobile-nav-body li.open > a svg { transform: rotate(180deg); opacity: 1; }

/* Mobile sub-menu */
.mobile-nav-body ul ul {
  display: none;
  background: var(--color-bg);
}

.mobile-nav-body ul ul.open { display: block; }

.mobile-nav-body ul ul li a {
  padding-left: 2.25rem;
  font-size: .84rem;
  font-weight: 400;
}

.mobile-nav-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

.mobile-nav-quote-btn {
  display: block;
  text-align: center;
  padding: .75rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background .2s;
}

.mobile-nav-quote-btn:hover { background: #e65100; color: #fff; }

/* ── FLOATING MOBILE CTA ─────────────────────────────────── */
.floating-mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: #fff;
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 20px rgba(0,0,0,.1);
}

.floating-cta-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.floating-cta-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .25rem;
  padding: .6rem .25rem;
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: .65rem;
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  transition: color .2s, background .2s;
  border-right: 1px solid var(--color-border);
  text-align: center;
}

.floating-cta-item:last-child { border-right: none; }

.floating-cta-item svg {
  width: 20px;
  height: 20px;
}

.floating-cta-item.cta-phone { color: var(--color-primary); }
.floating-cta-item.cta-zalo { color: #0068ff; }
.floating-cta-item.cta-messenger { color: #0084ff; }
.floating-cta-item.cta-quote {
  background: var(--color-accent);
  color: #fff;
}

.floating-cta-item:hover { opacity: .85; }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .main-nav { display: none; }
  .header-hotline-text { display: none; }
  .header-hotline-icon { margin: 0; }
  .header-quote-btn { display: none; }
  .mobile-menu-toggle { display: flex; }
  .floating-mobile-cta { display: block; }
  .top-bar-contact .top-bar-address { display: none; }
}

@media (max-width: 640px) {
  .top-bar-inner { height: 30px; }
  .top-bar-cert { display: none; }
  .top-bar-contact { gap: .75rem; }
  .header-inner { height: 58px; }
  .site-logo img { height: 36px; }
  .logo-text-main { font-size: 1rem; }
}