/* Header / Nav Styles */
.site-header {
  top: 0;
  margin-top: 0;
  position: fixed;
  width: 100%;
  padding: 1rem 0;
  background: rgba(11,15,43,0.85);
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 90%;
  max-width: 1200px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
  transition: right 0.3s cubic-bezier(.4,2,.6,1), opacity 0.3s;
}
.nav-links a {
  color: var(--white);
  font-weight: 600;
  font-size: 1.08rem;
  letter-spacing: 0.5px;
  padding: 0.5rem 1.1rem;
  border-radius: 30px;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.nav-links a:hover, .nav-links a:focus {
  background: var(--cyan);
  color: var(--blue-dark);
  box-shadow: 0 2px 8px rgba(0,202,255,0.10);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  width: 36px;
  height: 36px;
  cursor: pointer;
  z-index: 200;
}
.hamburger span {
  height: 4px;
  width: 100%;
  background: var(--cyan);
  margin: 5px 0;
  border-radius: 2px;
  transition: 0.3s;
}

@media (max-width: 900px) {
  .site-header .container {
    width: 96%;
  }
  .nav-links {
    gap: 1.2rem;
  }
}
@media (max-width: 700px) {
  .site-header .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  .nav-links {
    position: fixed;
    top: 0;
    right: -100vw;
    height: 100vh;
    width: 70vw;
    max-width: 320px;
    background: rgba(11,15,43,0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem 2rem 2rem 2rem;
    gap: 2rem;
    box-shadow: -2px 0 16px rgba(0,0,0,0.12);
    opacity: 0;
    pointer-events: none;
  }
  .nav-links.open {
    right: 0;
    opacity: 1;
    pointer-events: auto;
  }
  .hamburger {
    display: flex;
  }
}

.hamburger.open span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}