/* ==========================================================================
   VARIABLES
   ========================================================================== */
:root {
    --primary-color: #667eea;
    --primary-light: #818cf8;
    --white: #ffffff;
    --gray-light: #f8fafc;
    --gray-medium: #64748b;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
    --navbar-height: 80px;
}

/* ==========================================================================
   RESET
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--gray-medium);
    overflow-x: hidden;
}

body.nav-open {
    overflow: hidden;
}

/* ==========================================================================
   BOUTONS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    z-index: 1000;
    transition: var(--transition);
    height: var(--navbar-height);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-medium);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.5rem;
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1rem;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   MENU PRINCIPAL
   ========================================================================== */
.nav-menu {
    display: flex;
    justify-content: center;
    flex: 1;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--gray-medium);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
}

.nav-link:hover::after {
    width: 60%;
}

/* ==========================================================================
   ACTIONS
   ========================================================================== */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: var(--transition);
}

.hamburger-line {
    width: 20px;
    height: 2px;
    background: var(--gray-medium);
    transition: var(--transition);
    border-radius: 1px;
}

.mobile-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==========================================================================
   OVERLAY
   ========================================================================== */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ==========================================================================
   RESPONSIVE MOBILE
   ========================================================================== */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 16px;
    }
    
    .nav-actions .btn {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: var(--white);
        transform: translateY(-100%);
        transition: var(--transition);
        z-index: 999;
        border-radius: 0 0 16px 16px;
        box-shadow: var(--shadow-medium);
        opacity: 0;
        visibility: hidden;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 0;
        padding: 32px 24px;
    }
    
    .nav-link {
        width: 100%;
        padding: 16px 20px;
        font-size: 1rem;
        border-radius: var(--border-radius);
        text-align: center;
        background: var(--gray-light);
        margin-bottom: 12px;
        border: 1px solid rgba(102, 126, 234, 0.1);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-link:hover {
        background: var(--primary-color);
        color: var(--white);
        transform: translateY(-1px);
    }
    
    /* Boutons dans le menu mobile */
    .nav-menu::after {
        content: '';
        display: block;
        padding: 0 24px 24px;
        border-top: 1px solid rgba(102, 126, 234, 0.1);
        margin-top: 16px;
        padding-top: 24px;
    }
    
    .nav-menu::after {
        content: '';
        display: flex;
        gap: 12px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 12px;
    }
    
    .logo {
        font-size: 1.3rem;
    }
    
    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .nav-links {
        padding: 24px 16px;
    }
    
    .nav-link {
        padding: 14px 16px;
        font-size: 0.95rem;
    }
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-menu.active {
    animation: slideDown 0.3s ease forwards;
}

/* ==========================================================================
   FOCUS ET ACCESSIBILITÉ
   ========================================================================== */
.nav-link:focus,
.btn:focus,
.mobile-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--border-radius);
}

/* ==========================================================================
   PRINT
   ========================================================================== */
@media print {
    .navbar {
        display: none;
    }
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}