:root {
  --h-primary: #1a1a2e;
  --h-accent: #e94560;
  --h-secondary: #0f3460;
  --h-text: #ffffff;
  --h-text-muted: rgba(255,255,255,0.7);
  --h-text-dark: #333333;
  --h-bg-dark: #16213e;
  --h-shadow: rgba(0,0,0,0.15);
  --h-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --h-z-header: 1000;
  --h-z-overlay: 999;
  --h-z-mega: 1001;
}

.amilma-header *,
.amilma-header *::before,
.amilma-header *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.amilma-header {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--h-z-header);
  background: var(--h-primary);
  color: var(--h-text);
  transition: box-shadow var(--h-transition), background var(--h-transition);
}

.amilma-header.is-sticky {
  box-shadow: 0 2px 20px var(--h-shadow);
  background: rgba(26, 26, 46, 0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--h-text);
  flex-shrink: 0;
  z-index: 2;
}

.header-logo:hover,
.header-logo:focus-visible {
  opacity: 0.9;
}

.logo-icon {
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

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

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  color: var(--h-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 6px;
  transition: color var(--h-transition), background var(--h-transition);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.4;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-item:hover > .nav-link {
  color: var(--h-text);
  background: rgba(255,255,255,0.08);
}

.nav-link:focus-visible {
  outline: 2px solid var(--h-accent);
  outline-offset: 2px;
}

.chevron-down {
  transition: transform var(--h-transition);
}

.nav-item:hover .chevron-down,
.mega-toggle[aria-expanded="true"] .chevron-down {
  transform: rotate(180deg);
}

/* Mega Menu */
.mega-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--h-bg-dark);
  border-radius: 12px;
  padding: 24px;
  min-width: 600px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--h-transition), transform var(--h-transition), visibility var(--h-transition);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.05);
}

.nav-item:hover .mega-menu,
.mega-toggle[aria-expanded="true"] + .mega-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-grid {
  display: grid;
  gap: 24px;
}

.mega-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.mega-grid-5 {
  grid-template-columns: repeat(5, 1fr);
}

.mega-heading {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--h-accent);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.mega-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mega-links a {
  display: block;
  padding: 6px 0;
  color: var(--h-text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 400;
  transition: color var(--h-transition), padding-left var(--h-transition);
  border-radius: 4px;
}

.mega-links a:hover,
.mega-links a:focus-visible {
  color: var(--h-text);
  padding-left: 4px;
}

.mega-links a:focus-visible {
  outline: 2px solid var(--h-accent);
  outline-offset: 2px;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  z-index: 2;
}

.header-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: all var(--h-transition);
  font-family: inherit;
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.header-btn-outline {
  background: transparent;
  color: var(--h-text);
  border: 1.5px solid rgba(255,255,255,0.2);
}

.header-btn-outline:hover,
.header-btn-outline:focus-visible {
  border-color: var(--h-accent);
  color: var(--h-accent);
  background: rgba(233, 69, 96, 0.1);
}

.header-btn-primary {
  background: var(--h-accent);
  color: #fff;
  border: 1.5px solid var(--h-accent);
}

.header-btn-primary:hover,
.header-btn-primary:focus-visible {
  background: #d63851;
  border-color: #d63851;
}

.header-btn:focus-visible {
  outline: 2px solid var(--h-accent);
  outline-offset: 2px;
}

/* Hamburger */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background var(--h-transition);
}

.hamburger-btn:hover {
  background: rgba(255,255,255,0.08);
}

.hamburger-btn:focus-visible {
  outline: 2px solid var(--h-accent);
  outline-offset: 2px;
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--h-text);
  border-radius: 2px;
  transition: all var(--h-transition);
  transform-origin: center;
}

.hamburger-btn.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-close-btn {
  display: none;
}

/* ========== RESPONSIVE ========== */

@media (max-width: 1024px) {
  .mega-grid-5 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .hamburger-btn {
    display: flex;
  }

  .nav-close-btn {
    display: flex;
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.08);
    border: none;
    color: var(--h-text);
    border-radius: 8px;
    cursor: pointer;
    z-index: 5;
  }

  .nav-close-btn:hover {
    background: rgba(255,255,255,0.15);
  }

  .header-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 300px;
    max-width: 85vw;
    background: var(--h-primary);
    flex-direction: column;
    align-items: flex-start;
    padding: 60px 24px 24px;
    transform: translateX(100%);
    transition: transform var(--h-transition);
    overflow-y: auto;
    box-shadow: -10px 0 40px rgba(0,0,0,0.3);
    z-index: var(--h-z-overlay);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 0;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: 12px 0;
    justify-content: space-between;
    font-size: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    white-space: normal;
  }

  .mega-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    background: transparent;
    box-shadow: none;
    border: none;
    padding: 0 0 0 16px;
    min-width: auto;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
  }

  .nav-item:hover .mega-menu,
  .mega-toggle[aria-expanded="true"] + .mega-menu {
    transform: none;
    max-height: 600px;
    padding: 12px 0 12px 16px;
  }

  .mega-grid {
    grid-template-columns: 1fr !important;
    gap: 16px;
  }

  .mega-heading {
    margin-bottom: 8px;
  }

  .mega-links a {
    padding: 8px 0;
  }

  .header-actions .header-btn {
    display: none;
  }

  .header-actions .header-btn:last-child {
    display: none;
  }

  /* Mobile overlay */
  .header-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: calc(var(--h-z-overlay) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--h-transition);
  }

  .header-overlay.is-visible {
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 480px) {
  .header-inner {
    height: 56px;
    padding: 0 12px;
  }

  .logo-text {
    font-size: 1.1rem;
  }

  .header-nav {
    width: 100%;
    max-width: 100vw;
  }
}