.site-header {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 9999;
  background:
    linear-gradient(135deg, rgba(3, 16, 38, 0.96), rgba(6, 33, 78, 0.96)),
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.28), transparent 35%);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(125, 211, 252, 0.18);
  box-shadow: 0 14px 45px rgba(0, 0, 0, 0.45);
}

.header-container {
  max-width: 1250px;
  height: 82px;
  margin: auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #ffffff;
}

.logo-icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: linear-gradient(135deg, #38bdf8, #1d4ed8);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 23px;
  font-weight: 900;
  box-shadow:
    0 0 22px rgba(56, 189, 248, 0.65),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-title {
  font-size: 25px;
  font-weight: 900;
  letter-spacing: 0.3px;
}

.logo-subtitle {
  margin-top: 4px;
  font-size: 11px;
  font-weight: 700;
  color: #7dd3fc;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-menu a {
  position: relative;
  color: #dbeafe;
  font-size: 15px;
  font-weight: 700;
  transition: 0.3s ease;
}

.nav-menu > a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -9px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #38bdf8, #2563eb);
  border-radius: 20px;
  transition: 0.3s ease;
}

.nav-menu > a:hover {
  color: #ffffff;
}

.nav-menu > a:hover::after {
  width: 100%;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 11px 26px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
  transition: 0.3s ease;
}

.btn-daftar {
  color: #ffffff;
  background: linear-gradient(135deg, #38bdf8, #2563eb);
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.45);
}

.btn-login {
  color: #ffffff;
  border: 1px solid rgba(125, 211, 252, 0.65);
  background: rgba(255, 255, 255, 0.04);
}

.btn:hover {
  transform: translateY(-3px);
  filter: brightness(1.12);
}

.burger,
.close-menu,
.mobile-cta {
  display: none;
}

.burger {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(125, 211, 252, 0.22);
  border-radius: 12px;
  padding: 10px;
  cursor: pointer;
}

.burger span {
  display: block;
  width: 27px;
  height: 3px;
  margin: 5px 0;
  background: #ffffff;
  border-radius: 20px;
}

.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: 0.3s ease;
}

.menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 991px) {
  .header-cta {
    display: none;
  }

  .burger {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    z-index: 99999;
    width: 84%;
    max-width: 360px;
    height: 100vh;
    padding: 90px 28px 32px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    background:
      linear-gradient(180deg, #031026, #06214e),
      radial-gradient(circle at top right, rgba(56, 189, 248, 0.3), transparent 40%);
    border-left: 1px solid rgba(125, 211, 252, 0.2);
    box-shadow: -20px 0 55px rgba(0, 0, 0, 0.55);
    transition: 0.35s ease;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-menu a {
    font-size: 17px;
  }

  .close-menu {
    display: block;
    position: absolute;
    top: 20px;
    right: 24px;
    background: transparent;
    border: none;
    color: #ffffff;
    font-size: 42px;
    line-height: 1;
    cursor: pointer;
  }

  .mobile-cta {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 18px;
  }

  .mobile-cta .btn {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .header-container {
    height: 76px;
    padding: 0 16px;
  }

  .logo-icon {
    width: 42px;
    height: 42px;
  }

  .logo-title {
    font-size: 21px;
  }

  .logo-subtitle {
    font-size: 10px;
  }
}