/* =========================================================
   IIIT Glossary – Header + Nav
========================================================= */
:root {
  --gh-bg: #1b1725;
  --gh-ink: #f1f0ec;
  --gh-ink-dark: #111827;
  --gh-accent: #22b1d1;

  --gh-shadow: 0 10px 15px rgba(0, 0, 0, 0.09);
  --gh-shadow-sticky: 0 10px 18px rgba(0, 0, 0, 0.1);

  --dd-min: 280px;
  --dd-max: 380px;
}

/* =========================
   Header shell
========================= */
header.glossary {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 99999;
  padding: 0 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100px;
  background: var(--gh-bg);
  border-bottom: 2px solid #f1f0ec;
  box-shadow: var(--gh-shadow);
  transition: box-shadow 0.2s ease;
  overflow: visible;
}

header.glossary::before {
  content: none !important;
}
header.glossary::after {
  display: none;
}

header.glossary.is-sticky {
  box-shadow: var(--gh-shadow-sticky);
}

/* =========================
   Logo
========================= */
header.glossary img {
  width: 75px !important;
  height: 75px !important;
  border-radius: 50%;
  border: none !important;
  background: transparent !important;
  padding: 0;
  object-fit: contain;
}

header.glossary .logo {
  display: flex;
  align-items: center;
  gap: 18px;
}

header.glossary .logo h2 {
  margin: 0;
}

header.glossary .logo h2 a {
  color: var(--gh-ink);
  font-size: 20px;
  font-weight: 600;
  text-decoration: none;
  display: block;
  line-height: 1.2;
  font-family: "Lora", serif;
  letter-spacing: 0.2px;
}

header.glossary .logo .sub-logo {
  font-size: 13px;
  color: rgba(241, 240, 236, 0.5);
  font-family: sans-serif;
  letter-spacing: 0.4px;
  margin-top: 4px;
  font-weight: 400;
  text-align: center;
  display: block;
}

/* Prevent theme icons */
.glossary-menu .menu-indicator,
.glossary-menu .sub-arrow,
.glossary-menu .wn-arrow,
.glossary-menu .arrow,
.glossary-menu .caret,
.glossary-menu .indicator,
.glossary-menu i.fa,
.glossary-menu i.fas,
.glossary-menu i.far {
  display: none !important;
}

/* =========================
   Hamburger
========================= */
.hamburger-button {
  background: none;
  border: none;
  padding: 12px;
  margin: 0;
  cursor: pointer;
}

.hamburger-icon {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--gh-accent);
  position: relative;
}

.hamburger-icon:before,
.hamburger-icon:after {
  content: "";
  width: 100%;
  height: 2px;
  background-color: var(--gh-accent);
  position: absolute;
  left: 0;
}

.hamburger-icon:before {
  top: -7px;
}
.hamburger-icon:after {
  bottom: -7px;
}

button.close-button {
  display: none;
}
.hamburger-button.is-hidden {
  display: none !important;
}
body.gh-lock {
  overflow: hidden !important;
}

/* =========================
   Desktop
========================= */
@media (min-width: 966px) {
  .hamburger-button,
  .close-button {
    display: none !important;
  }

  .menu-glossary-menu-container {
    display: block !important;
    position: static !important;
  }

  .glossary-menu {
    margin: 0 !important;
    padding: 0;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0;
  }

  .glossary-menu > li {
    position: relative;
  }

  /* Hairline separator */
  .glossary-menu > li:after {
    content: "";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 14px;
    background: rgba(255, 255, 255, 0.2);
  }

  .glossary-menu > li:last-child:after {
    content: none;
  }

  /* Root links */
  .glossary-menu > li > a {
    color: rgba(241, 240, 236, 0.7);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    position: relative;
    padding: 8px 16px;
    background: transparent !important;
    font-size: 14px;
    font-weight: 600;
    font-family: sans-serif;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    border-radius: 4px;
    transition: color 0.15s ease, background 0.15s ease;
  }

  .glossary-menu > li > a:hover {
    color: var(--gh-ink);
    background: rgba(255, 255, 255, 0.05) !important;
  }

  /* Active state */
  .glossary-menu > li.current-menu-item > a,
  .glossary-menu > li.current-menu-parent > a,
  .glossary-menu > li.current-menu-ancestor > a {
    color: var(--gh-accent);
  }

  /* Bottom line indicator */
  .glossary-menu > li > a::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: -1px;
    height: 2px;
    background: var(--gh-accent);
    border-radius: 1px 1px 0 0;
    transform: scaleX(0);
    transform-origin: center;
    opacity: 0;
    transition: transform 0.18s ease, opacity 0.18s ease;
  }

  .glossary-menu > li.current-menu-item > a::after,
  .glossary-menu > li.current-menu-parent > a::after,
  .glossary-menu > li.current-menu-ancestor > a::after,
  .glossary-menu > li:hover > a::after,
  .glossary-menu > li:focus-within > a::after {
    transform: scaleX(1);
    opacity: 1;
  }

  /* Caret */
  .glossary-menu > li.menu-item-has-children > a {
    padding-right: 28px;
  }

  .glossary-menu > li.menu-item-has-children > a::before {
    content: "\f107";
    font-family: FontAwesome;
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 13px;
    opacity: 0.7;
    color: currentColor;
    transition: transform 0.18s ease;
  }

  .glossary-menu > li.menu-item-has-children:hover > a::before,
  .glossary-menu > li.menu-item-has-children:focus-within > a::before {
    transform: translateY(-50%) rotate(180deg);
  }

  /* Dropdown panels */
  .glossary-menu li {
    position: relative;
    margin-bottom: 0;
  }

  .glossary-menu li > ul {
    display: block !important;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 99999;
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-top: 2px solid var(--gh-accent);
    min-width: var(--dd-min);
    max-width: var(--dd-max);
    padding: 6px 0;
    margin: 0;
    list-style: none;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
  }

  .glossary-menu li > ul::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: -12px;
    height: 12px;
    background: transparent;
  }

  .glossary-menu li:hover > ul,
  .glossary-menu li:focus-within > ul {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  /* Third level flyout */
  .glossary-menu li ul li > ul {
    top: 0;
    left: 100%;
    transform: translateX(8px);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    border-left: 2px solid var(--gh-accent);
    margin-left: 1px;
  }

  .glossary-menu li ul li:hover > ul,
  .glossary-menu li ul li:focus-within > ul {
    transform: translateX(0);
  }

  /* Dropdown links */
  .glossary-menu li > ul a {
    display: block;
    padding: 11px 20px;
    color: #374151;
    text-decoration: none;
    white-space: normal;
    overflow-wrap: anywhere;
    line-height: 1.4;
    font-size: 12px;
    font-weight: 600;
    font-family: sans-serif;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    transition: background 0.15s ease, color 0.15s ease;
  }

  .glossary-menu li > ul li + li {
    border-top: 1px solid rgba(0, 0, 0, 0.05);
  }

  .glossary-menu li > ul a:hover {
    background: rgba(34, 177, 209, 0.08);
    color: var(--gh-accent);
  }

  /* No underline inside dropdown */
  .glossary-menu .sub-menu a::after {
    content: none !important;
    display: none !important;
  }

  /* Child caret */
  .glossary-menu li ul li.menu-item-has-children > a {
    position: relative;
    padding-right: 28px;
  }

  .glossary-menu li ul li.menu-item-has-children > a::before {
    content: "\f105";
    font-family: FontAwesome;
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 13px;
    opacity: 0.7;
    color: currentColor;
  }
}

/* =========================
   Mobile
========================= */
@media (max-width: 965px) {
  header.glossary {
    padding: 0 18px;
    height: 78px;
  }

  header.glossary img {
    width: 55px !important;
    height: 55px !important;
  }

  header.glossary .logo h2 a {
    font-size: 15px;
  }

  header.glossary .logo {
    gap: 12px;
  }

  /* Disable desktop hover dropdowns */
  .glossary-menu li:hover > ul,
  .glossary-menu li:focus-within > ul {
    display: none !important;
  }

  /* Mobile overlay */
  .menu-glossary-menu-container {
    display: none;
  }

  .menu-glossary-menu-container.open {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 99999;
    padding-top: 90px;
    overflow-y: auto;
    background: rgba(19, 15, 30, 0.97);
    backdrop-filter: blur(8px);
  }

  /* Close button */
  button.close-button.open {
    display: block;
    position: fixed;
    top: 14px;
    right: 14px;
    z-index: 100000;
    width: 44px;
    height: 44px;
    border: 1px solid rgba(241, 240, 236, 0.15);
    background: rgba(241, 240, 236, 0.05);
    padding: 0;
    cursor: pointer;
    border-radius: 4px;
  }

  .close-icon {
    display: block;
    font-size: 28px;
    line-height: 44px;
    text-align: center;
    color: var(--gh-accent);
  }

  /* Mobile menu list */
  .menu-glossary-menu-container .glossary-menu {
    display: block !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 8px 18px 40px !important;
    list-style: none !important;
  }

  .menu-glossary-menu-container .glossary-menu > li {
    display: block !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .menu-glossary-menu-container .glossary-menu > li::after {
    content: none !important;
    display: none !important;
  }

  .menu-glossary-menu-container .glossary-menu a {
    color: rgba(241, 240, 236, 0.75) !important;
    text-decoration: none;
    background: transparent !important;
    font-weight: 600;
  }

  .menu-glossary-menu-container .glossary-menu > li > a,
  .menu-glossary-menu-container .sub-menu > li > a {
    display: flex !important;
    width: 100% !important;
    justify-content: space-between !important;
    align-items: center !important;
    text-align: left !important;
    gap: 14px;
    padding: 16px 6px !important;
    padding-right: 46px !important;
    position: relative;
    box-sizing: border-box;
    font-size: 13px !important;
    letter-spacing: 1px;
  }

  .menu-glossary-menu-container .glossary-menu a::after {
    content: none !important;
    display: none !important;
  }

  /* Submenus */
  .menu-glossary-menu-container .sub-menu {
    display: none !important;
    position: static !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 0 8px 16px !important;
    box-shadow: none !important;
    background: transparent !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    border: none !important;
  }

  .menu-glossary-menu-container .menu-item-has-children.is-open > .sub-menu {
    display: block !important;
  }

  .menu-glossary-menu-container .sub-menu > li {
    display: block !important;
    width: 100% !important;
  }

  .menu-glossary-menu-container .sub-menu .sub-menu {
    padding-left: 14px !important;
    margin-left: 8px !important;
    border-left: 2px solid rgba(34, 177, 209, 0.25) !important;
  }

  /* Mobile caret */
  .menu-glossary-menu-container .menu-item-has-children > a::after {
    content: "\f107" !important;
    font-family: FontAwesome !important;
    position: absolute !important;
    right: 16px !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    font-size: 16px !important;
    color: rgba(241, 240, 236, 0.5) !important;
    pointer-events: none !important;
    transition: transform 0.18s ease, color 0.18s ease !important;
    display: block !important;
  }

  .menu-glossary-menu-container .menu-item-has-children.is-open > a::after {
    transform: translateY(-50%) rotate(180deg) !important;
    color: var(--gh-accent) !important;
  }
}


/* Scroll to Top Button */
#scrollTopBtn {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 99999;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    border: none;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, #f0f4f8, #d9e2ec);
    box-shadow: 
        5px 5px 12px rgba(0, 0, 0, 0.15), 
        -3px -3px 8px rgba(255, 255, 255, 0.9),
        inset 0 1px 1px rgba(255, 255, 255, 0.8);
    transition: all 0.2s ease;
}

#scrollTopBtn:hover {
    background: linear-gradient(145deg, #e8f0f7, #cfd8e3);
    box-shadow: 
        6px 6px 16px rgba(0, 0, 0, 0.18), 
        -3px -3px 10px rgba(255, 255, 255, 1),
        inset 0 1px 1px rgba(255, 255, 255, 0.9);
    transform: translateY(-3px);
}

#scrollTopBtn:active {
    background: linear-gradient(145deg, #d9e2ec, #f0f4f8);
    box-shadow: 
        inset 3px 3px 8px rgba(0, 0, 0, 0.15), 
        inset -2px -2px 6px rgba(255, 255, 255, 0.8);
    transform: translateY(0);
}

#scrollTopBtn i {
    color: #1a9bb5;
    font-size: 20px;
    filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.15));
    margin-right: 0;
}