.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 72px;
  padding: 0 clamp(1rem, 4vw, 3.5rem);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 40px rgba(17, 28, 44, 0.06);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: #0f172a;
  font-family: "Plus Jakarta Sans", "Noto Sans KR", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  width: 1.75rem;
  height: 1.75rem;
  object-fit: contain;
  flex: none;
}

.brand-text {
  color: #0f172a;
  font-family: "Plus Jakarta Sans", "Noto Sans KR", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  color: #64748b;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: #eef2ff;
  color: #4f46e5;
  outline: none;
}

.site-nav a.is-active,
.site-nav a[aria-current="page"] {
  background: #eef2ff;
  color: #4f46e5;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.lang-switcher {
  display: none;
  align-items: center;
  gap: 0.35rem;
}

.lang-btn {
  padding: 0.22rem 0.6rem;
  border: 1px solid #c7c4d8;
  border-radius: 9999px;
  background: transparent;
  color: #777587;
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  transition: all 0.15s;
}

.lang-btn.is-active {
  background: #3e32d3;
  color: #fff;
  border-color: #3e32d3;
}

.lang-btn:hover:not(.is-active) {
  background: #e2dfff;
  color: #3e32d3;
  border-color: #3e32d3;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.5rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #3e32d3 0%, #5850ec 100%);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 12px 28px rgba(62, 50, 211, 0.2);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.header-cta:hover,
.header-cta:focus-visible {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 14px 30px rgba(62, 50, 211, 0.24);
  outline: none;
}

@media (min-width: 768px) {
  .site-nav {
    display: flex;
  }

  .lang-switcher {
    display: inline-flex;
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: 0 1rem;
  }

  .brand-text {
    font-size: 0.95rem;
  }

  .header-cta {
    padding: 0.58rem 1.05rem;
    font-size: 0.82rem;
  }
}