/* ==========================================
   NAVBAR.CSS - BubbleWeb
   Navigation dark mode + glassmorphism
   ========================================== */

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  background: rgba(15, 23, 42, 0.95);
  box-shadow: var(--shadow-md), 0 0 40px rgba(34, 211, 238, 0.05);
  border-bottom-color: var(--color-border);
}

/* ===== NAVBAR CONTAINER ===== */
.navbar {
  width: 100%;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 7.5rem;
  position: relative;
}

/* ===== BRAND / LOGO ===== */
.nav-brand {
  flex-shrink: 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: all var(--transition-base);
}

.nav-logo:hover {
  opacity: 0.9;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-bubble);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

/* Si logo image */
.nav-logo img,
.nav-logo-icon {
  height: 60px;
  width: 60px;
  border-radius: var(--radius-sm);
  filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.4));
  transition: all var(--transition-base);
}

.nav-logo:hover img,
.nav-logo:hover .nav-logo-icon {
  transform: scale(1.08) rotate(3deg);
  filter: drop-shadow(0 0 14px rgba(34, 211, 238, 0.6));
}

/* ===== NAV LINKS ===== */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 0.75rem 1.125rem;
  color: var(--color-text-light);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  position: relative;
}

/* Underline animée */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0.35rem;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--gradient-bubble);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background: rgba(34, 211, 238, 0.08);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--color-primary);
  background: rgba(34, 211, 238, 0.1);
}

.nav-link.active::after {
  transform: scaleX(1);
}

/* ===== CTA BUTTON ===== */
.nav-item-cta {
  margin-left: 0.5rem;
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-bg);
  background: var(--gradient-bubble);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: var(--shadow-glow-blue);
  transition: all var(--transition-fast);
}

.btn-nav:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-blue), var(--shadow-sm);
}

.btn-nav:active {
  transform: translateY(0);
}

/* ===== MOBILE TOGGLE ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(34, 211, 238, 0.1);
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

/* Hamburger → X animation (2 lignes) */
.nav-toggle[aria-expanded="true"] .nav-toggle-line:first-child {
  transform: translateY(4px) rotate(45deg);
  background: var(--color-primary);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:last-child {
  transform: translateY(-4px) rotate(-45deg);
  background: var(--color-primary);
}

/* ===== MOBILE STYLES ===== */
@media (max-width: 968px) {
  .nav-toggle {
    display: flex;
    z-index: 1001;
  }

  .nav-links {
    position: fixed;
    top: 7.5rem;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    padding: var(--space-md);
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    max-height: calc(100vh - 7.5rem);
    overflow-y: auto;
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-item {
    width: 100%;
  }
  
  .nav-link {
    display: block;
    padding: 1rem 1.25rem;
    text-align: center;
    font-size: 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
  }
  
  .nav-link::after {
    display: none;
  }
  
  .nav-link:hover,
  .nav-link.active {
    border-color: var(--color-border);
    background: var(--color-bg-light);
  }
  
  .nav-item-cta {
    margin-left: 0;
    margin-top: 0.5rem;
  }
  
  .btn-nav {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    border-radius: var(--radius-lg);
  }
  
  /* Logo text visible on mobile */
  .nav-logo-text {
    font-size: 1.35rem;
  }

  /* Logo icon size on mobile */
  .nav-logo img,
  .nav-logo-icon {
    height: 36px;
    width: 36px;
  }
}

/* ===== TABLET ===== */
@media (min-width: 969px) and (max-width: 1100px) {
  .nav-links {
    gap: 0.125rem;
  }

  .nav-link {
    padding: 0.5rem 0.875rem;
    font-size: 0.95rem;
  }

  .btn-nav {
    padding: 0.5rem 1.25rem;
    font-size: 0.95rem;
  }

  .nav-logo-text {
    font-size: 1.4rem;
  }

  .nav-logo img,
  .nav-logo-icon {
    height: 38px;
    width: 38px;
  }
}

/* ===== ACCESSIBILITY ===== */
.nav-toggle:focus-visible,
.nav-link:focus-visible,
.btn-nav:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip to content */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--gradient-bubble);
  color: var(--color-bg);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: 600;
  z-index: 10000;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: 0;
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .site-header,
  .nav-links,
  .nav-link,
  .nav-link::after,
  .nav-toggle-line,
  .nav-logo img,
  .btn-nav {
    transition: none;
  }
}