/* ===== HEADER & NAVIGATION OPTIMISÉ ===== */
header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(33, 33, 33, 0.08);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid rgba(211, 47, 47, 0.1);
}

header.scrolled {
    padding: 0;
    box-shadow: 0 8px 30px rgba(33, 33, 33, 0.12);
    background: rgba(255, 255, 255, 0.98);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 0;
    position: relative;
}

/* ===== Logo OPTIMISÉ ===== */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-img {
    height: 85px; /* ajuste selon ton besoin */
    width: auto;
}


/* Container des menus */
.nav-container {
    display: flex;
    align-items: center;
    padding: 10px;
    gap: 10px;
}

.nav-menu {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-left: 5px;
    padding: 0;
    list-style: none;
}

.nav-link {
    font-weight: 600;
    color: var(--dark);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 4px 2px;
    font-size: 0.95rem;
    text-transform: uppercase;
/*    letter-spacing: 0.3px;*/
    white-space: nowrap;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 1px;
    transition: width 0.3s ease;
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.auth-buttons {
    display: flex;
    gap: 12px;
    align-items: center;
}

.auth-buttons .btn {
    padding: 10px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.auth-buttons .btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

.auth-buttons .btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(211, 47, 47, 0.2);
}

.auth-buttons .btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 6px 15px rgba(211, 47, 47, 0.25);
}

.auth-buttons .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(211, 47, 47, 0.35);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 32px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    position: relative;
}

.menu-icon {
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-btn.active .menu-icon:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active .menu-icon:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.mobile-menu-btn.active .menu-icon:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

body.menu-open {
    overflow: hidden;
}


/* ===== RESPONSIVE HEADER - OPTIMISÉ ===== */

/* Tablette - 1024px et moins */
@media (max-width: 1024px) {
    .nav-menu {
        gap: 20px;
    }
    
    .auth-buttons {
        gap: 10px;
    }
    
    .auth-buttons .btn {
        padding: 8px 20px;
        font-size: 0.85rem;
    }
}

/* Tablette - 900px et moins */
@media (max-width: 900px) {
    .nav-container {
        position: fixed;
        top: 0;
        right: -100%;
        width: 320px;
        height: 100vh;
        background: white;
        box-shadow: -10px 0 40px rgba(33, 33, 33, 0.15);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 30px 40px;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        overflow-y: auto;
    }
    
    .nav-container.active {
        right: 0;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 0;
        width: 100%;
        margin-bottom: 30px;
    }
    
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid rgba(224, 224, 224, 0.5);
    }
    
    .nav-link {
        display: block;
        padding: 12px 0;
        font-size: 1.1rem;
        text-transform: none;
        letter-spacing: normal;
        color: var(--dark);
        width: 100%;
    }
    
    .nav-link::before {
        display: none;
    }
    
    .nav-link:hover,
    .nav-link.active {
        color: var(--primary);
        padding-left: 10px;
        background: linear-gradient(90deg, rgba(211, 47, 47, 0.05), transparent);
    }
    
    .auth-buttons {
        flex-direction: column;
        width: 100%;
        gap: 15px;
        margin-top: 20px;
    }
    
    .auth-buttons .btn {
        width: 100%;
        text-align: center;
        padding: 14px 20px;
        font-size: 1rem;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    /* Overlay pour mobile */
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(33, 33, 33, 0.5);
        backdrop-filter: blur(3px);
        -webkit-backdrop-filter: blur(3px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }
    
    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }
}

/* Mobile - 768px et moins */
@media (max-width: 768px) {
    .navbar {
        padding: 15px 0;
    }
    
    .logo {
        font-size: 1.6rem;
    }
    
    .logo i {
        font-size: 1.8rem;
    }
    
    .nav-container {
        width: 280px;
        padding: 90px 25px 30px;
    }
}

/* Mobile - 480px et moins */
@media (max-width: 480px) {
    .logo {
        font-size: 1.5rem;
        gap: 10px;
    }
    
    .logo i {
        font-size: 1.6rem;
    }
    
    .logo-text {
        font-size: 1.4rem;
    }
    
    .nav-container {
        width: 100%;
        padding: 80px 20px 30px;
    }
    
    .nav-link {
        font-size: 1rem;
        padding: 16px 0;
    }
    
    .mobile-menu-btn {
        width: 28px;
        height: 21px;
    }
    
    .menu-icon {
        height: 2.5px;
    }
}

/* Très petits mobiles - 360px et moins */
@media (max-width: 360px) {
    .logo {
        font-size: 1.4rem;
    }
    
    .logo-text {
        font-size: 1.3rem;
    }
    
    .logo i {
        font-size: 1.5rem;
    }
    
    .nav-container {
        padding: 70px 15px 25px;
    }
    
    .nav-link {
        font-size: 0.95rem;
        padding: 14px 0;
    }
}