/* ============================================
   Header Component Styles
   Premium glassmorphism header with mobile drawer
   Uses vars from global-tokens.css
   ============================================ */

/* ---------- Header-specific tokens ---------- */
:root {
  --header-bg: var(--color-surface);
  --header-bg-scrolled: var(--color-surface-solid);
  --header-shadow: var(--shadow-sm);
  --header-shadow-scrolled: var(--shadow-md);
  --header-border: var(--color-border-subtle);

  --drawer-width: 320px;
}

/* ---------- Header Container ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  height: var(--header-height);
  background: var(--header-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--header-border);
  box-shadow: var(--header-shadow);
  font-family: var(--font-family);
  transition:
    background var(--ease-medium),
    box-shadow var(--ease-medium),
    border-color var(--ease-medium);
}

.site-header.scrolled {
  background: var(--header-bg-scrolled);
  box-shadow: var(--header-shadow-scrolled);
  border-bottom-color: transparent;
}

/* ---------- Header Inner ---------- */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Brand / Logo ---------- */
.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--ease-fast);
}

.header-brand:hover {
  opacity: 0.85;
}

.header-logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  transition: transform var(--ease-medium);
}

.header-brand:hover .header-logo-img {
  transform: rotate(-5deg) scale(1.05);
}

.header-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.header-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.3px;
  white-space: nowrap;
}

.header-subtitle {
  font-size: 11px;
  font-weight: 600;
  color: #374151;
  letter-spacing: 0.2px;
  margin-top: 1px;
  white-space: nowrap;
}

/* ---------- Desktop Navigation ---------- */
.header-nav {
  display: flex;
  align-items: center;
}

.header-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.header-nav li {
  position: relative;
}

.header-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 16px;
  font-weight: 550;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition:
    color var(--ease-fast),
    background var(--ease-fast);
  white-space: nowrap;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 16px;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header-nav li:hover > a::after,
.header-nav a.active::after,
.header-nav li.parent-active > a::after {
  width: calc(100% - 32px);
}

.chevron-icon {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header-nav li:hover > a .chevron-icon {
  transform: rotate(180deg);
}

/* Dropdown Menu Desktop */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: #ffffff;
  border: 1px solid var(--color-border-subtle);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  padding: 8px 0 !important;
  display: block !important;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: 
    opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0.3s;
  z-index: 100;
  pointer-events: none;
}

.header-nav li:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-menu li {
  width: 100%;
}

.dropdown-menu a {
  display: block !important;
  padding: 10px 20px !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  color: var(--color-text-secondary) !important;
  width: 100%;
  box-sizing: border-box;
}

.dropdown-menu a::after {
  display: none;
}

.dropdown-menu a:hover,
.dropdown-menu a.active {
  background: rgba(15, 118, 110, 0.05) !important;
  color: var(--color-primary) !important;
  padding-left: 20px !important;
}

/* ---------- Header Actions (Desktop) ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* ---------- Language Toggle Button ---------- */
.lang-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1.5px solid var(--color-border);
  background: var(--color-bg-subtle);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  min-width: 48px; /* Tối ưu cho En/Vi */
  transition:
    background var(--ease-fast),
    border-color var(--ease-fast),
    transform var(--ease-fast),
    box-shadow var(--ease-fast);
  white-space: nowrap;
}

.lang-toggle-btn:hover {
  background: rgba(15, 118, 110, 0.08);
  border-color: var(--color-border-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.lang-toggle-btn:active {
  transform: translateY(0);
}

.lang-flag {
  width: 22px;
  height: 15px;
  object-fit: cover;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
  flex-shrink: 0;
}

.lang-text {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1px;
}

/* ---------- Login Button ---------- */
.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 22px;
  background: var(--color-primary);
  color: #ffffff;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  min-width: 140px; /* Cố định chiều rộng tối thiểu */
  transition:
    transform var(--ease-fast),
    box-shadow var(--ease-fast),
    background var(--ease-fast);
  white-space: nowrap;
}

.btn-login:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
}

.btn-login:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(15, 118, 110, 0.15);
}

.login-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ---------- Mobile Actions ---------- */
.header-mobile-actions {
  display: none;
  align-items: center;
  gap: 8px;
}

/* ---------- Menu Toggle (Hamburger) ---------- */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  transition: background var(--ease-fast);
}

.menu-toggle:hover {
  background: rgba(15, 118, 110, 0.06);
}

.menu-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition:
    transform var(--ease-medium),
    opacity var(--ease-fast),
    background var(--ease-fast);
}

/* ---------- Drawer Overlay ---------- */
.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 1001;
  background: var(--color-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--ease-smooth),
    visibility var(--ease-smooth);
}

.drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ---------- Mobile Drawer ---------- */
.header-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 1002;
  width: 100vw;
  max-width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: var(--color-bg);
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  overscroll-behavior-y: contain;
}

.header-drawer.open {
  transform: translateX(0);
}

/* Drawer Header */
.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
}

.drawer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.drawer-logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.drawer-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.drawer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.2px;
}

.drawer-subtitle {
  font-size: 10px;
  font-weight: 600;
  color: #374151;
  margin-top: 1px;
}

.drawer-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: var(--color-bg-subtle);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition:
    background var(--ease-fast),
    color var(--ease-fast),
    transform var(--ease-fast);
}

.drawer-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
  transform: rotate(90deg);
}

/* Drawer Navigation */
.drawer-nav {
  flex: 1;
  padding: 16px 12px;
}

.drawer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.drawer-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 550;
  color: var(--color-text);
  text-decoration: none;
  transition:
    background var(--ease-fast),
    color var(--ease-fast),
    padding-left var(--ease-fast);
}

.drawer-nav a:hover {
  background: rgba(15, 118, 110, 0.06);
  color: var(--color-primary);
  padding-left: 24px;
}

/* Mobile Dropdown */
.drawer-dropdown-trigger {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 14px 16px !important;
  font-size: 15px !important;
  font-weight: 550 !important;
  color: var(--color-text) !important;
  cursor: pointer !important;
  user-select: none !important;
  -webkit-tap-highlight-color: transparent !important;
  background: transparent !important;
}

.drawer-dropdown-trigger * {
  pointer-events: none !important; /* Đảm bảo click vào icon hay text đều trúng trigger */
}

.drawer-has-dropdown.active > .drawer-submenu {
  display: block !important;
  visibility: visible !important;
  height: auto !important;
  opacity: 1 !important;
}

.drawer-submenu {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
  background: rgba(0, 0, 0, 0.02) !important;
  display: none !important;
  border-left: 3px solid var(--color-primary) !important;
  margin-left: 16px !important;
}

.drawer-submenu a {
  padding: 12px 20px !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  color: var(--color-text-secondary) !important;
}

.drawer-nav a.active {
  background: rgba(15, 118, 110, 0.08);
  color: var(--color-primary);
  font-weight: 600;
}

/* Staggered animation for drawer items */
.header-drawer.open .drawer-nav li {
  animation: drawerSlideIn 400ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.header-drawer.open .drawer-nav li:nth-child(1) {
  animation-delay: 80ms;
}

.header-drawer.open .drawer-nav li:nth-child(2) {
  animation-delay: 130ms;
}

.header-drawer.open .drawer-nav li:nth-child(3) {
  animation-delay: 180ms;
}

.header-drawer.open .drawer-nav li:nth-child(4) {
  animation-delay: 230ms;
}

.header-drawer.open .drawer-nav li:nth-child(5) {
  animation-delay: 280ms;
}

@keyframes drawerSlideIn {
  from {
    opacity: 0;
    transform: translateX(24px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Drawer Footer */
.drawer-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-shrink: 0;
}

.drawer-login {
  width: 100%;
  justify-content: center;
  padding: 14px 24px;
  font-size: 15px;
}

.drawer-lang-switch {
  display: flex;
  justify-content: center;
}

.lang-toggle-btn.drawer {
  width: 100%;
  justify-content: center;
  padding: 12px 16px;
  font-size: 15px;
}

/* ============================================
   Responsive Breakpoints
   ============================================ */

/* Large Desktop */
@media (min-width: 1025px) {
  .header-mobile-actions {
    display: none;
  }

  .header-actions {
    display: flex;
  }

  .header-nav {
    display: flex;
  }
}

/* Tablet & Small Desktop */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 24px;
  }

  .header-nav {
    display: none;
  }

  .header-actions {
    display: none;
  }

  .header-mobile-actions {
    display: flex;
  }

  /* Hide login & language toggle from header bar — they're in the drawer */
  .header-mobile-actions .lang-toggle-btn.mobile,
  .header-mobile-actions .btn-login.mobile {
    display: none;
  }
}

/* Mobile & Tablet - Progress Bar at bottom of header */
@media (max-width: 1024px) {
  /* Progress bar container */
  .header-progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(15, 118, 110, 0.1);
    overflow: hidden;
  }

  /* Progress bar fill */
  .header-progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(
      90deg,
      var(--color-primary) 0%,
      var(--color-primary-light, #14b8a6) 100%
    );
    transition: width 0.1s ease-out;
    will-change: width;
  }

  /* Hide border and show progress bar instead */
  .site-header {
    border-bottom: none;
  }

  .site-header.scrolled {
    border-bottom: none;
  }
}

/* Mobile */
@media (max-width: 640px) {
  :root {
    --header-height: 64px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .header-logo-img {
    width: 38px;
    height: 38px;
  }

  .header-title {
    font-size: 15px;
  }

  .header-subtitle {
    font-size: 10px;
  }
}

/* Very Small Mobile */
@media (max-width: 380px) {
  .header-brand-text {
    display: none;
  }

  .header-logo-img {
    width: 36px;
    height: 36px;
  }
}