/**
 * GyanPoints – Header & Navigation (authoritative)
 * Desktop: 64px | Mobile: 56px | Touch targets ≥ 44px
 */

.header {
  background: #fff !important;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.08) !important;
  position: sticky !important;
  top: 0 !important;
  z-index: 1000 !important;
  width: 100% !important;
}

body.admin-bar .header { top: 32px !important; }
@media (max-width: 782px) {
  body.admin-bar .header { top: 46px !important; }
}

.header .navbar {
  display: flex !important;
  flex-direction: row !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 12px !important;
  width: 100% !important;
  max-width: 1400px !important;
  margin: 0 auto !important;
  padding: 0 20px !important;
  height: 64px !important;
  min-height: 64px !important;
  max-height: 64px !important;
  box-sizing: border-box !important;
}

/* Logo */
.header .logo {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
  flex-shrink: 0 !important;
  text-decoration: none !important;
  max-width: 180px;
}
.header .logo img,
.header .logo .custom-logo,
.header .logo .gp-brand-logo {
  height: 40px !important;
  max-height: 40px !important;
  width: auto !important;
  max-width: 160px !important;
  object-fit: contain !important;
  display: block !important;
}
.header .logo-icon {
  width: 36px !important;
  height: 36px !important;
  border-radius: 10px !important;
  background: linear-gradient(135deg, #f97316, #ea580c) !important;
  color: #fff !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  font-weight: 800 !important;
  font-size: 0.85rem !important;
}
.header .logo-text {
  font-size: 1.15rem !important;
  font-weight: 800 !important;
  color: #16a34a !important;
  line-height: 1 !important;
  white-space: nowrap;
}

/* Desktop menu – centered */
.header .nav-menu {
  flex: 1 1 auto !important;
  display: flex !important;
  justify-content: center !important;
  align-items: center !important;
  position: static !important;
  width: auto !important;
  height: auto !important;
  background: transparent !important;
  box-shadow: none !important;
  padding: 0 !important;
  right: auto !important;
}

.header .nav-links,
.header .nav-menu .nav-links,
.header .nav-menu > ul {
  display: flex !important;
  flex-direction: row !important;
  align-items: center !important;
  justify-content: center !important;
  flex-wrap: nowrap !important;
  gap: 2px 4px !important;
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  width: auto !important;
}

.header .nav-links li,
.header .nav-menu > ul > li {
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  display: flex !important;
}

.header .nav-links a,
.header .nav-links li a,
.header .nav-menu .nav-links > a,
.header .nav-menu > ul > li > a {
  display: inline-flex !important;
  align-items: center !important;
  padding: 6px 11px !important;
  font-size: 0.875rem !important;
  font-weight: 600 !important;
  color: #1e293b !important;
  border-radius: 6px !important;
  text-decoration: none !important;
  white-space: nowrap !important;
  line-height: 1.25 !important;
  min-height: 36px !important;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  position: relative !important;
  transition: color 0.15s ease, background 0.15s ease !important;
}

.header .nav-links a:hover,
.header .nav-links li a:hover {
  color: #f97316 !important;
  background: #fff7ed !important;
}

.header .nav-links a.active,
.header .nav-links a.current-menu-item,
.header .nav-links li.current-menu-item > a,
.header .nav-links li.current_page_item > a {
  color: #f97316 !important;
  background: transparent !important;
}

.header .nav-links a.active::after,
.header .nav-links li.current-menu-item > a::after {
  content: '' !important;
  position: absolute !important;
  left: 11px !important;
  right: 11px !important;
  bottom: 3px !important;
  height: 2px !important;
  background: #f97316 !important;
  border-radius: 2px !important;
}

/* Actions */
.header .nav-actions {
  display: flex !important;
  align-items: center !important;
  gap: 4px !important;
  flex-shrink: 0 !important;
}

.header .nav-actions button,
.header .search-btn,
.header .theme-toggle,
.header .menu-toggle {
  width: 40px !important;
  height: 40px !important;
  min-width: 40px !important;
  min-height: 40px !important;
  border: none !important;
  background: transparent !important;
  border-radius: 8px !important;
  color: #1e293b !important;
  font-size: 1rem !important;
  cursor: pointer !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 0 !important;
}

.header .nav-actions button:hover {
  background: #f1f5f9 !important;
  color: #f97316 !important;
}

.header .nav-close { display: none !important; }
.header .nav-overlay { display: none !important; }

/* —— Mobile —— */
@media (max-width: 1024px) {
  .header .navbar {
    height: 56px !important;
    min-height: 56px !important;
    max-height: 56px !important;
    padding: 0 12px !important;
  }

  .header .logo img,
  .header .logo .custom-logo,
  .header .logo .gp-brand-logo {
    height: 34px !important;
    max-height: 34px !important;
  }

  .header .menu-toggle {
    display: inline-flex !important;
    width: 44px !important;
    height: 44px !important;
    min-width: 44px !important;
    min-height: 44px !important;
  }

  .header .nav-menu {
    position: fixed !important;
    top: 0 !important;
    right: -100% !important;
    left: auto !important;
    width: min(300px, 86vw) !important;
    height: 100vh !important;
    max-height: 100vh !important;
    background: #fff !important;
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.1) !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: stretch !important;
    padding: 16px !important;
    transition: right 0.28s ease !important;
    z-index: 1002 !important;
    overflow-y: auto !important;
  }

  .header .nav-menu.open {
    right: 0 !important;
  }

  .header .nav-close {
    display: flex !important;
    justify-content: flex-end !important;
    margin-bottom: 8px !important;
  }

  .header .nav-close button {
    width: 44px !important;
    height: 44px !important;
    border: none !important;
    background: #f1f5f9 !important;
    border-radius: 10px !important;
    font-size: 1.1rem !important;
    cursor: pointer !important;
    color: #1e293b !important;
  }

  .header .nav-links,
  .header .nav-menu .nav-links,
  .header .nav-menu > ul {
    flex-direction: column !important;
    align-items: stretch !important;
    flex-wrap: nowrap !important;
    gap: 4px !important;
    width: 100% !important;
  }

  .header .nav-links a,
  .header .nav-links li a {
    padding: 14px 16px !important;
    font-size: 1rem !important;
    min-height: 48px !important;
    border-radius: 10px !important;
    width: 100% !important;
  }

  .header .nav-links a.active::after,
  .header .nav-links li.current-menu-item > a::after {
    display: none !important;
  }

  .header .nav-links a.active,
  .header .nav-links li.current-menu-item > a {
    background: #fff7ed !important;
    color: #f97316 !important;
  }

  .header .nav-overlay {
    display: none;
    position: fixed !important;
    inset: 0 !important;
    background: rgba(15, 23, 42, 0.45) !important;
    z-index: 1001 !important;
  }

  .header .nav-overlay.open {
    display: block !important;
  }
}

@media (min-width: 1025px) {
  .header .menu-toggle {
    display: none !important;
  }
}

/* Dark mode */
body.dark-mode .header {
  background: #0f172a !important;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06) !important;
}
body.dark-mode .header .nav-links a {
  color: #e2e8f0 !important;
}
body.dark-mode .header .nav-links a:hover {
  background: #1e293b !important;
  color: #fb923c !important;
}
body.dark-mode .header .nav-links a.active {
  color: #fb923c !important;
}
body.dark-mode .header .nav-actions button {
  color: #e2e8f0 !important;
}
body.dark-mode .header .nav-menu {
  background: #0f172a !important;
}
body.dark-mode .header .nav-close button {
  background: #1e293b !important;
  color: #e2e8f0 !important;
}

/* MathJax content spacing */
.entry-content mjx-container,
.gp-quiz-wrap mjx-container {
  overflow-x: auto;
  max-width: 100%;
}


/* Body scroll lock when mobile menu open */
body.gp-menu-open {
  overflow: hidden !important;
  touch-action: none;
}

/* Ensure hamburger is visible only on mobile */
@media (min-width: 1025px) {
  .header .menu-toggle {
    display: none !important;
  }
  .header .nav-close,
  .header .nav-overlay {
    display: none !important;
  }
  .header .nav-menu {
    position: static !important;
    right: auto !important;
    width: auto !important;
    height: auto !important;
    max-height: none !important;
    background: transparent !important;
    box-shadow: none !important;
    padding: 0 !important;
    overflow: visible !important;
  }
}

/* Prevent horizontal page scroll from off-canvas panel */
html, body {
  overflow-x: hidden;
}