/* ========================================
   HEADER NAVIGATION
   ======================================== */

.navbar {
    background: transparent !important;
    backdrop-filter: none;
    border-bottom: none;
    padding: 1rem 0;
    transition: all 0.3s ease;
    z-index: 1030;
}

/* État scrollé */
.navbar.scrolled {
    background: rgba(var(--bs-white-rgb), 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(var(--bs-primary-rgb), 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 0.5rem 0;
}

/* Logo */
.navbar-brand {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--bs-white) !important;
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: -1px;
}

.navbar.scrolled .navbar-brand {
    color: var(--bs-primary) !important;
    font-size: 1.6rem;
}

.navbar-logo {
    height: 50px;
    width: auto;
    transition: all 0.3s ease;
    filter: brightness(0) invert(1); 
}

.navbar.scrolled .navbar-logo {
    height: 42px;
    filter: none;
}

/* Navigation links */
.navbar-nav .nav-link {
    color: var(--bs-white) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.6rem 1.2rem !important;
    margin: 0 0.2rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.navbar.scrolled .navbar-nav .nav-link {
    color: var(--bs-dark) !important;
}

.navbar-nav .nav-link:hover {
    background: rgba(var(--bs-white-rgb), 0.2);
    transform: translateY(-1px);
    color: var(--bs-info) !important;
}

.navbar.scrolled .navbar-nav .nav-link:hover {
    background: rgba(var(--bs-primary-rgb), 0.1);
    color: var(--bs-primary) !important;
}

/* Lien actif */
.navbar-nav .nav-link.active {
    background: rgba(var(--bs-white-rgb), 0.25);
    color: var(--bs-white) !important;
    font-weight: 600;
}

.navbar.scrolled .navbar-nav .nav-link.active {
    background: rgba(var(--bs-primary-rgb), 0.15);
    color: var(--bs-primary) !important;
}

/* Toggle button pour mobile */
.navbar-toggler {
    border: 2px solid rgba(var(--bs-white-rgb), 0.3);
    padding: 0.4rem 0.6rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.navbar.scrolled .navbar-toggler {
    border-color: rgba(var(--bs-primary-rgb), 0.3);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(var(--bs-white-rgb), 0.25);
}

.navbar.scrolled .navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
}

/* Icône du toggle */
.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar.scrolled .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ========================================
   RESPONSIVE 
   ======================================== */

@media (max-width: 991px) {
    .navbar-collapse {
        background: rgba(var(--bs-white-rgb), 0.95);
        backdrop-filter: blur(20px);
        border-radius: 15px;
        padding: 1rem;
        margin-top: 1rem;
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }
    
    .navbar-nav .nav-link {
        text-align: center;
        margin: 0.2rem 0;
        color: var(--bs-dark) !important;
        border-radius: 8px;
    }
    
    .navbar-nav .nav-link.active {
        color: var(--bs-primary) !important;
        background: rgba(var(--bs-primary-rgb), 0.1);
        font-weight: 600;
    }
    
    .navbar-nav .nav-link:hover {
        background: rgba(var(--bs-primary-rgb), 0.1);
        color: var(--bs-primary) !important;
    }
    
    .navbar-brand {
        font-size: 1.5rem;
    }
    
    .navbar-logo {
        height: 45px;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */

/* Animation smooth pour les transitions */
* {
    scroll-behavior: smooth;
}

/* Micro-animations sur les interactions */
.navbar-nav .nav-link {
    position: relative;
    overflow: hidden;
}

.navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--bs-info);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::before,
.navbar-nav .nav-link.active::before {
    width: 60%;
}

.navbar.scrolled .navbar-nav .nav-link::before {
    background: var(--bs-primary);
}