/* ============================================
   Navigation - Shared (sourced from home.css)
   Used on login/register/purchase/member-center/pay-success
   ============================================ */

:root {
  --nav-text-primary: #0f172a;
  --nav-text-secondary: #475569;
  --nav-accent-1: #06b6d4;
  --nav-accent-2: #3b82f6;
  --nav-accent-3: #8b5cf6;
  --nav-border-color: rgba(15, 23, 42, 0.08);
  --nav-font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --nav-font-en: 'Outfit', sans-serif;
  --nav-max-width: 1200px;
  --nav-height: 72px;
}

/* ======== Nav ======== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--nav-border-color);
  transition: background 0.3s, box-shadow 0.3s;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

/* ======== Nav Inner ======== */
.nav-inner {
  width: 100%;
  max-width: var(--nav-max-width);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ======== Logo ======== */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--nav-text-primary);
}
.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--nav-accent-1), var(--nav-accent-3));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--nav-font-en);
  font-weight: 800;
  font-size: 14px;
  color: #fff;
}
.nav-logo-text {
  font-family: var(--nav-font-cn);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 1px;
}
.nav-logo-text small {
  font-weight: 300;
  font-size: 11px;
  color: var(--nav-text-secondary);
  display: block;
  letter-spacing: 0;
}

/* ======== Links ======== */
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  color: var(--nav-text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--nav-accent-1), var(--nav-accent-2));
  transition: width 0.3s;
  border-radius: 2px;
}
.nav-links a:hover { color: var(--nav-text-primary); }
.nav-links a:hover::after { width: 100%; }

/* CTA pill button */
.nav-cta {
  background: linear-gradient(135deg, var(--nav-accent-1), var(--nav-accent-2));
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 600 !important;
  transition: transform 0.3s, box-shadow 0.3s !important;
}
.nav-cta:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.3);
}
.nav-cta::after { display: none !important; }

/* Login link (slightly emphasized) */
.nav-login {
  font-weight: 600 !important;
  color: var(--nav-text-primary) !important;
}

/* ======== Toggle (Mobile) ======== */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--nav-text-primary);
  border-radius: 2px;
  transition: 0.3s;
}

/* ======== Responsive ======== */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--nav-border-color);
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    z-index: 99;
  }
  .nav-links.open {
    transform: translateY(0);
  }
}