/* ============================================
   Navbar — glassmorphism, sticky
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: padding var(--dur-med) var(--ease-soft), background var(--dur-med), box-shadow var(--dur-med);
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(250, 250, 250, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(17,24,39,0.06), 0 8px 30px rgba(17,24,39,0.04);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--ink);
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(37,99,235,0.3);
  flex-shrink: 0;
}
.logo-mark svg { width: 18px; height: 18px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  background: rgba(255,255,255,0.5);
  padding: 6px;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
}

.nav-links a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-dark);
  padding: 9px 18px;
  border-radius: var(--r-pill);
  transition: background var(--dur-fast), color var(--dur-fast);
  display: block;
}
.nav-links a:hover { background: white; color: var(--primary); box-shadow: var(--shadow-sm); }
.nav-links a.active { background: white; color: var(--primary); font-weight: 600; box-shadow: var(--shadow-sm); }

/* Dark mode navbar */
.dark .navbar.scrolled {
  background: rgba(17,24,39,0.80);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06), 0 8px 30px rgba(0,0,0,0.3);
}
.dark .nav-links {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.08);
}
.dark .nav-links a { color: #D1D5DB; }
.dark .nav-links a:hover,
.dark .nav-links a.active { background: rgba(255,255,255,0.1); color: white; box-shadow: none; }
.dark .logo { color: #F9FAFB; }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  background: rgba(17,24,39,0.04);
}
.nav-toggle svg { width: 20px; height: 20px; }

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: min(320px, 80vw);
  background: var(--card);
  box-shadow: var(--shadow-lg);
  z-index: 110;
  padding: 24px;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease);
  display: flex;
  flex-direction: column;
}
.mobile-menu.open { transform: translateX(0); }

.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }

.mobile-menu a {
  display: block;
  padding: 16px 8px;
  font-size: 17px;
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17,24,39,0.4);
  z-index: 105;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
  backdrop-filter: blur(2px);
}
.mobile-overlay.open { opacity: 1; pointer-events: auto; }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-search-box { display: none; }
}

@media (min-width: 881px) {
  .mobile-menu, .mobile-overlay { display: none; }
}

/* Nav search box */
.nav-search-box {
  display: flex;
  align-items: center;
  gap: 7px;
  background: rgba(17,24,39,0.04);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  padding: 8px 14px;
  transition: background 0.2s, border-color 0.2s, width 0.3s var(--ease);
  width: 180px;
}
.nav-search-box:focus-within {
  background: white;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
  width: 220px;
}
.nav-search-box svg { width: 15px; height: 15px; color: var(--text); flex-shrink: 0; }
.nav-search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 13.5px;
  font-family: var(--font-body);
  color: var(--ink);
  width: 100%;
}
.nav-search-box input::placeholder { color: var(--text); }
.dark .nav-search-box {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}
.dark .nav-search-box:focus-within {
  background: rgba(255,255,255,0.12);
  border-color: var(--primary-light);
}
.dark .nav-search-box input { color: #F9FAFB; }