/* ==============================
   nav.css — Navbar, Mobile Menu, Theme Toggle
   ============================== */

/* ==============================
   NAVBAR
   ============================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 2rem;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav-logo-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.logo-img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  flex-shrink: 0;
}

.logo-pro {
  color: var(--accent-bright);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
  min-width: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  flex-shrink: 0;
}

.nav-links a, .nav-actions a {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover, .nav-actions a:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-links a[aria-current="page"] {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-cta {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-bright) 100%) !important;
  color: #fff !important;
  font-weight: 600 !important;
  padding: 0.45rem 1rem !important;
  box-shadow: 0 12px 28px rgba(48, 67, 105, 0.26);
  transition: none !important;
}

.nav-cta:hover {
  background: var(--accent-bright) !important;
  color: #fff !important;
}

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  width: 38px; height: 38px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), border-color var(--transition), transform 0.2s;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--bg-card-hover);
  transform: scale(1.1) rotate(15deg);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
}

.hamburger:hover {
  background: var(--bg-card-hover);
}

.hamburger-line {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 0.75rem 1.25rem 1rem;
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  border-top: 1px solid var(--border);
}

.mobile-menu.is-open {
  display: flex;
}

.mobile-menu a {
  display: block;
  padding: 0.75rem 0.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.mobile-menu a:last-of-type {
  border-bottom: none;
}

.mobile-menu a:hover,
.mobile-menu a[aria-current="page"] {
  color: var(--text-primary);
}

.mobile-cta {
  display: block;
  margin-top: 0.5rem;
  padding: 0.6rem 1rem !important;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-bright) 100%) !important;
  color: #fff !important;
  font-weight: 600 !important;
  text-align: center;
  border-radius: var(--radius-md);
  border-bottom: none !important;
}