/* ======= Header Styles ======= */
header {
  background-color: #0a121f;
  color: white;
  padding: 12px 0;
  box-shadow: 0 4px 15px rgba(0, 255, 204, 0.3);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1100;
  backdrop-filter: saturate(180%) blur(10px);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

header.scrolled {
  background-color: rgba(10, 18, 31, 0.95);
  box-shadow: 0 6px 20px rgba(0, 255, 204, 0.5);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  height: 56px;
}

.logo {
  font-size: 26px;
  font-weight: 900;
  color: #00ffcc;
  letter-spacing: 0.1em;
  font-family: "Aldrich", sans-serif;
  font-weight: 400;
  font-style: normal;
  user-select: none;
  transition: color 0.3s ease;
  cursor: pointer;
}

.logo:hover {
  color: #00e6b3;
  text-shadow: 0 0 10px #00ffccaa;
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-weight: 700;
  font-size: 1rem;
  user-select: none;
}

.nav-menu li a {
  color: white;
  padding: 8px 8px;
  border-radius: 6px;
  text-decoration: none;
  position: relative;
  transition: color 0.3s ease, background-color 0.3s ease;
}

/* Underline animation */
.nav-menu li a::after {
  content: '';
  position: absolute;
  width: 0%;
  height: 2px;
  bottom: 4px;
  left: 0;
  background-color: #00ffcc;
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-menu li a:hover::after,
.nav-menu li a.active::after {
  width: 100%;
}

.nav-menu li a:hover,
.nav-menu li a.active {
  color: #00ffcc;
  background-color: rgba(0, 255, 204, 0.1);
}

/* User Menu Links */
.user-menu a {
  color: #a0f0e5;
  font-weight: 600;
  margin-left: 20px;
  text-decoration: none;
  transition: color 0.3s ease;
  user-select: none;
}

.user-menu a:hover {
  color: #00ffcc;
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
  display: none;
  font-size: 30px;
  color: white;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.3s ease;
  user-select: none;
}

.mobile-menu-toggle:hover {
  color: #00ffcc;
}

/* Responsive Navigation */
@media (max-width: 768px) {
  .nav-menu {
    flex-direction: column;
    position: absolute;
    top: 56px;
    right: 15px;
    background-color: #111c29;
    width: 220px;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0, 255, 204, 0.4);
    max-height: 0;
    overflow: hidden;
    padding: 0;
    opacity: 0;
    transition: max-height 0.4s ease, opacity 0.4s ease, padding 0.4s ease;
    z-index: 1050;
  }

  .nav-menu.active {
    max-height: 420px;
    opacity: 1;
    padding: 15px 0;
  }

  .nav-menu li a {
    padding: 12px 20px;
    font-size: 1.1rem;
  }

  .user-menu {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }
}

/* ===== Header Responsive Styles ===== */

/* Tablets and smaller desktops */
@media (max-width: 1024px) {
  .header-container {
    padding: 0 15px;
    max-width: 95%;
  }

  .logo {
    font-size: 24px;
  }

  .nav-menu li a {
    font-size: 0.95rem;
    padding: 7px 12px;
  }
}

/* Tablets and large mobiles */
@media (max-width: 768px) {
  /* Mobile Menu toggle button visible */
  .mobile-menu-toggle {
    display: block;
  }

  /* Hide user menu on mobile */
  .user-menu {
    display: none;
  }

  /* Navigation menu vertical & hidden initially */
  .nav-menu {
    flex-direction: column;
    position: absolute;
    top: 56px;
    right: 15px;
    background-color: #111c29;
    width: 220px;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0, 255, 204, 0.4);
    max-height: 0;
    overflow: hidden;
    padding: 0;
    opacity: 0;
    transition: max-height 0.4s ease, opacity 0.4s ease, padding 0.4s ease;
    z-index: 1050;
  }

  /* When active, show menu */
  .nav-menu.active {
    max-height: 420px;
    opacity: 1;
    padding: 15px 0;
  }

  .nav-menu li a {
    padding: 12px 20px;
    font-size: 1.1rem;
  }
}

/* Small mobiles */
@media (max-width: 480px) {
  .header-container {
    padding: 0 10px;
  }

  .logo {
    font-size: 20px;
    letter-spacing: 0.08em;
  }

  .nav-menu li a {
    font-size: 1rem;
    padding: 10px 18px;
  }

  .nav-menu {
    width: 180px;
  }

  .mobile-menu-toggle {
    font-size: 26px;
  }
}