/* ============================ ROOT VARIABLES ============================ */
:root {
  /* Dimensions */
  --nav-height: 72px;
  /* Colors */
  --text-light: #ffffff;
  --accent-light: #cfcfcf; 
  /* Backgrounds */
  --header-bg: linear-gradient(to bottom, rgba(22,22,22,0.7), rgba(22,22,22,0.45));
  --dropdown-bg: rgba(30, 30, 30, 0.95);
  --mobile-bg: rgba(22,22,22,0.87);

  /* Blur */
  --blur-header: 4px;
  --blur-dropdown: 12px;
  --blur-mobile: 8px;

  /* Borders & shadows */
  --border-light: rgba(255, 255, 255, 0.09);
  --inner-shadow: inset 0 0 10px rgba(0,0,0,0.25);
  --shadow: 0 8px 28px rgba(0,0,0,0.55);

  /* Motion */
  --transition: 0.3s ease;
}

/* ============================ HEADER ============================ */
.gp-header {
  position: sticky;
  top: 0;
  z-index: 9999;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--header-bg);
  backdrop-filter: blur(var(--blur-header));
  -webkit-backdrop-filter: blur(var(--blur-header));
  box-shadow: var(--shadow);
  border-bottom: 1px solid var(--border-light);
}



/* ============================ HEADER INNER ============================ */
.gp-header__inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* Logo */
.gp-logo {
  position: absolute;
  left: 16px;
}
.gp-logo img {
  max-height: 48px;
  display: block;
}
/* Hamburger */
.gp-hamburger {
  display: none;
  position: absolute;
  right: 16px;
  background: none;
  border: none;
  padding: 6px;
  cursor: pointer;
}

.gp-hamburger__icon rect {
  fill: var(--text-light);
  transition: fill var(--transition), transform var(--transition);
  transform-origin: 50% 50%;
}

.gp-hamburger.is-open rect:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.gp-hamburger.is-open rect:nth-child(2) {
  opacity: 0;
}
.gp-hamburger.is-open rect:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ============================ NAVIGATION ============================ */
.gp-nav__list {
  display: flex;
  list-style: none;
  gap: 12px;
  padding: 0;
  margin: 0;
}

.gp-nav__list > li {
  position: relative;
}

.gp-nav__list a {
  display: block;
  padding: 12px 18px;
  color: var(--text-light);
  text-decoration: none;
  font-weight: 600;
  border-radius: 6px;
  transition: color var(--transition), opacity var(--transition);
}

.gp-nav__list a:hover {
  color: var(--accent-light);
}

/* ============================ SUBMENU ============================ */
.sub-menu,
.sub-menu li {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sub-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) translateY(14px);
  min-width: 220px;
  background: var(--dropdown-bg);
  backdrop-filter: blur(var(--blur-dropdown));
  -webkit-backdrop-filter: blur(var(--blur-dropdown));
  border-radius: 12px;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 999;
}

.gp-nav__list li:hover > .sub-menu,
.gp-nav__list li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.sub-menu a {
  display: block;
  padding: 12px 22px;
  font-size: 15px;
  color: var(--text-light);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.sub-menu a:hover {
  background: rgba(255,255,255,0.07);
  color: #fff;
}

/* ============================ MOBILE PANEL ============================ */
.gp-mobile-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 100vw;
  height: 100vh;
  padding: 22px;
  padding-top: var(--nav-height);
  direction: rtl;
  overflow-y: auto;
  background: var(--mobile-bg);
  backdrop-filter: blur(var(--blur-mobile));
  -webkit-backdrop-filter: blur(var(--blur-mobile));
  transform: translateX(100%);
  transition: transform var(--transition);
  z-index: 100000;
}

.gp-mobile-panel[aria-hidden="false"] {
  transform: translateX(0);
}

.gp-mobile-panel__close {
  position: absolute;
  top: 18px;
  left: 18px;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
}

.gp-mobile-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.gp-mobile-panel li {
  margin: 16px 0;
}

.gp-mobile-panel a {
  display: block;
  color: #fff;
  padding: 10px 0;
  text-decoration: none;
  font-size: 15px;
}

/* Mobile submenu */
.gp-mobile-menu__sub {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transform: translateY(-8px);
  transition: max-height var(--transition), opacity var(--transition), transform var(--transition);
}

.gp-mobile-menu__sub.open {
  max-height: 900px;
  opacity: 1;
  transform: translateY(0);
}

.gp-mobile-menu__sub a {
  padding-right: 18px;
}

.gp-mobile-menu__chev {
  float: left;
  transition: transform var(--transition);
}

/* ============================ RESPONSIVE ============================ */
@media (max-width: 1024px) {
  .gp-nav__list {
    display: none;
  }
  .gp-hamburger {
    display: block;
  }
}

@media (min-width: 1025px) {
  .gp-mobile-panel {
    transform: translateX(100%) !important;
    opacity: 0 !important;
    pointer-events: none;
  }
}