/* ---------- Navigation ---------- */
/*
 * Fixed navigation bar with scroll effects
 * Shows logo when scrolled past hero section
 */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 15px 60px;
  background: #FFFFFF;
  backdrop-filter: blur(10px);
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.3s ease, padding 0.3s ease;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

nav.scrolled {
  padding: 12px 60px;
}

.nav-brand {
  text-decoration: none;
  display: block;
}

.nav-logo-container {
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: auto;
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav-text-black {
  font-size: 13px;
  font-weight: 600;
  color: #1d1d1f;
  letter-spacing: -0.01em;
}

.nav-text-blue {
  font-size: 13px;
  font-weight: 600;
  background: linear-gradient(90deg, #7B68EE 0%, #4169E1 50%, #0066FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 35px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  align-items: center;
}

nav a {
  text-transform: uppercase;
  color: #1d1d1f;
  opacity: 0.8;
  transition: opacity 0.3s ease;
}

nav a:hover {
  opacity: 1;
  color: #0066FF;
}

/* ---------- Language Toggle ---------- */
/*
 * KR / EN language switcher in navigation
 * Active language is underlined
 */

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 10px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 20px;
  padding: 4px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: #6E6E73;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 14px;
  text-transform: uppercase;
  border-radius: 16px;
  transition: all 0.3s ease;
  letter-spacing: 0.02em;
}

.lang-btn:hover {
  color: #1d1d1f;
  background: rgba(0, 0, 0, 0.05);
}

.lang-btn.active {
  color: #FFFFFF;
  background: #0066FF;
  box-shadow: 0 2px 8px rgba(0, 102, 255, 0.3);
}

/* ---------- Footer ---------- */
footer {
  background: rgba(0, 0, 0, 0.02);
  padding: 20px 0;
  margin-top: 30px;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer-content {
  text-align: center;
  font-size: 12px;
  color: #86868B;
  letter-spacing: 0.02em;
}