.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid #111827;
  transform: translateY(0);
  transition:
    transform 0.22s ease,
    box-shadow 0.18s ease,
    background-color 0.18s ease,
    border-color 0.18s ease;
}

/* When scrolled (adds shadow, slightly darker) */
.site-header--scrolled {
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.9);
  background-color: rgba(2, 6, 23, 0.98);
  border-color: #020617;
}

/* Hidden state when scrolling down */
.site-header--hidden {
  transform: translateY(-100%);
  box-shadow: none;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.6rem; /* bigger header */
  padding: 0.25rem 0;
}

/* Logo */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.logo-mark {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 30%, #ffffff, #5865f2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #f9fafb;
  box-shadow:
    0 14px 26px rgba(0, 0, 0, 0.85),
    0 0 0 1px rgba(148, 163, 184, 0.28);
}

.logo-text {
  font-weight: 700;
  letter-spacing: 0.03em;
  font-size: 1.08rem;
  color: #f9fafb;
}

.logo-text span {
  color: #8b9cff;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-size: 0.92rem;
}

.nav a {
  position: relative;
  text-decoration: none;
  color: #9ca3af;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background-color: transparent;
  transition:
    background-color 0.16s ease,
    color 0.16s ease,
    box-shadow 0.16s ease,
    transform 0.06s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid transparent;
  pointer-events: none;
  transition: border-color 0.18s ease;
}

.nav a:hover {
  color: #e5e7eb;
  background-color: rgba(88, 101, 242, 0.15);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.5);
  transform: translateY(-1px);
}

.nav a:hover::after {
  border-color: rgba(129, 140, 248, 0.65);
}

/* Mobile */
@media (max-width: 640px) {
  .header__inner {
    height: 4.2rem;
  }

  .nav {
    gap: 0.6rem;
    font-size: 0.85rem;
  }

  .nav a {
    padding: 0.28rem 0.7rem;
  }

  .logo-text {
    font-size: 1.0rem;
  }

  .logo-mark {
    width: 2.1rem;
    height: 2.1rem;
    font-size: 0.9rem;
  }
}
/* make sure .logo is flex so image + text are aligned */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

/* new logo image */
.logo-image {
  width: 38px;          /* tweak if you want bigger/smaller */
  height: 38px;
  border-radius: 50%;   /* keeps it round */
  display: block;
}

/* optional: if you still have .logo-mark from before, hide it */
.logo-mark {
  display: none;
}