/* ============================================================
   AQOON TECH  —  Navbar  (css/navbar.css)
   Sticky top navbar, logo, links, actions,
   mobile hamburger & slide-down menu
   ============================================================ */

/* ── Progress reading bar ── */
#progress-bar {
  position: fixed;
  top: 0; left: 0;
  z-index: calc(var(--z-modal) + 10);
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--blue) 0%, #90c8ff 100%);
  border-radius: 0 2px 2px 0;
  transition: width .1s linear;
  pointer-events: none;
}

/* ── Navbar shell ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding-inline: var(--pad-x);
  gap: var(--s6);
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition:
    background    var(--t-slow) var(--ease),
    border-color  var(--t-slow) var(--ease),
    box-shadow    var(--t)      var(--ease);
}
[data-theme="dark"] .navbar {
  background: rgba(15,17,23,.90);
}
.navbar.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,.07); }

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--t) var(--ease);
}
.nav-logo:hover { opacity: .82; }

.logo-mark {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--charcoal);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--blue);
  flex-shrink: 0;
  transition: transform var(--t) var(--ease-spring);
}
[data-theme="dark"] .logo-mark { background: var(--surface-2); }
.nav-logo:hover .logo-mark { transform: rotate(-5deg) scale(1.06); }
.logo-mark svg { width: 22px; height: 22px; }

.logo-text  { line-height: 1.1; }
.logo-name  {
  font-family: var(--font-brand);
  font-size: 17px;
  color: var(--text);
  display: block;
  letter-spacing: .3px;
}
.logo-name span { color: var(--blue); }
.logo-tagline {
  font-family: var(--font-ui);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--text-3);
  display: block;
  margin-top: 1px;
}

/* ── Primary navigation links ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0 auto;
}

.nav-link {
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  padding: 7px 15px;
  border-radius: var(--r-sm);
  position: relative;
  white-space: nowrap;
  transition:
    color      var(--t) var(--ease),
    background var(--t) var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 3px; left: 50%;
  transform: translateX(-50%);
  width: 0; height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transition: width var(--t) var(--ease);
}
.nav-link:hover,
.nav-link.active {
  color: var(--blue);
  background: var(--blue-light);
}
.nav-link:hover::after,
.nav-link.active::after { width: 18px; }
[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active { background: rgba(74,144,217,.10); }

/* ── Nav right-side actions ── */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--s2);
  flex-shrink: 0;
}

/* Language toggle */
.lang-switch {
  display: flex;
  background: var(--bg-alt);
  border-radius: var(--r-full);
  padding: 3px;
  border: 1px solid var(--border);
  gap: 2px;
}
.lang-btn {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .5px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  border: none;
  background: transparent;
  color: var(--text-3);
  cursor: pointer;
  transition: all var(--t) var(--ease);
}
.lang-btn.active {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 2px 8px rgba(74,144,217,.40);
}

/* Dark-mode toggle */
.btn-theme {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
  transition: all var(--t) var(--ease-spring);
}
.btn-theme:hover {
  background: var(--blue-light);
  border-color: var(--blue-mid);
  color: var(--blue);
  transform: rotate(20deg);
}

/* CTA pill */
.nav-cta {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  background: var(--blue);
  color: #fff;
  padding: 9px 22px;
  border-radius: var(--r-full);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  box-shadow: 0 3px 12px rgba(74,144,217,.30);
  transition: all var(--t) var(--ease-spring);
}
.nav-cta:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-blue);
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--t) var(--ease);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile navigation ── */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  z-index: var(--z-sticky);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: var(--s3) var(--s5) var(--s5);
  flex-direction: column;
  gap: var(--s1);
  box-shadow: var(--shadow-md);
  animation: slideDown .2s var(--ease-out) both;
}
.mobile-nav.open { display: flex; }

.mobile-link {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  padding: 12px 16px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  gap: var(--s3);
  transition: all var(--t) var(--ease);
}
.mobile-link:hover {
  background: var(--blue-light);
  color: var(--blue);
}
[data-theme="dark"] .mobile-link:hover { background: rgba(74,144,217,.10); }

.mobile-divider {
  height: 1px;
  background: var(--border);
  margin: var(--s2) 0;
}

/* ── Responsive breakpoints ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta   { display: none; }
  .hamburger { display: flex; }
}