/* ===== MODERNIZED HEADER ===== */
.header {
  background: linear-gradient(135deg, #1a1f35 0%, #252b42 50%, #1e2338 100%);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  z-index: 1000;
  padding: 10px 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 1440px) {
  .header {
    max-width: 1400px;
    left: 50%;
    transform: translateX(-50%);
  }
}

.header-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  position: relative;
  z-index: 2;
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
}

.header-left {
  justify-content: flex-start;
}

.header-center {
  display: flex;
  justify-content: center;
}

.header-right {
  justify-content: flex-end;
}

.nav-icons {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.header.scrolled {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.16), 0 2px 8px rgba(0, 0, 0, 0.1);
  background: linear-gradient(135deg, rgba(26, 31, 53, 0.98) 0%, rgba(37, 43, 66, 0.98) 50%, rgba(30, 35, 56, 0.98) 100%);
  backdrop-filter: blur(24px);
}

.logo {
  width: 200px;
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.logo:hover {
  transform: translateY(-2px);
}

.logo img {
  width: 100%;
  height: auto;
  transition: var(--transition);
  filter: drop-shadow(0 2px 8px rgba(255, 255, 255, 0.1));
}

.nav-container {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translate(-50%, -10px);
  width: min(1100px, calc(100% - 40px));
  background: linear-gradient(135deg, rgba(20, 26, 43, 0.98) 0%, rgba(30, 38, 58, 0.96) 100%);
  border-radius: 24px;
  box-shadow: 0 30px 60px rgba(10, 20, 38, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.08);
  padding: 30px 40px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(20px);
  z-index: 999;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container.active {
  transform: translate(-50%, 0);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  animation: slideDownFade 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideDownFade {
  from {
    transform: translate(-50%, -20px);
    opacity: 0;
  }
  to {
    transform: translate(-50%, 0);
    opacity: 1;
  }
}

.nav-content {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.mobile-sidebar {
  display: none;
}

.nav-menu {
  display: flex;
  justify-content: center;
  gap: 30px;
  list-style: none;
  flex-wrap: wrap;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  border-radius: 999px;
  transition: var(--transition);
  letter-spacing: 0.04em;
  font-size: 15px;
  box-shadow: inset 0 0 0 1px rgba(243, 164, 255, 0.15);
}

.nav-link:hover, .nav-link:focus {
  color: #f3a4ff;
  background-color: rgba(243, 164, 255, 0.12);
  box-shadow: inset 0 0 0 1px rgba(243, 164, 255, 0.4);
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: white;
  min-width: 250px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
  border-radius: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1000;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(5px);
}

.dropdown a {
  color: var(--text-color);
  padding: 12px 20px;
  text-decoration: none;
  display: block;
  transition: var(--transition);
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
}

.dropdown a:last-child {
  border-bottom: none;
}

.dropdown a:hover {
  background-color: rgba(37, 99, 235, 0.05);
  color: var(--primary-color);
  padding-left: 25px;
}

.icon-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 10px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  width: 44px;
  height: 44px;
  position: relative;
  overflow: hidden;
}

.icon-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  transform: translate(-50%, -50%);
  transition: width 0.4s, height 0.4s;
}

.icon-btn:hover::before {
  width: 100%;
  height: 100%;
}

.icon-btn:hover {
  transform: translateY(-3px) scale(1.05);
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.icon-btn:active {
  transform: translateY(-1px) scale(1.02);
}

.icon-btn img {
  width: 20px;
  height: 20px;
  transition: var(--transition);
  filter: brightness(0) invert(1);
  position: relative;
  z-index: 1;
}

.icon-btn:hover img {
  transform: scale(1.1);
  filter: brightness(0) invert(1) drop-shadow(0 0 8px rgba(255, 255, 255, 0.5));
}