/* 
==========================================================================
HEADER & NAVIGATION - PORTFOLIO JULIEN PINOT
Styles pour le header fixe et la navigation responsive
==========================================================================
*/

/* ==================== HEADER PROFESSIONNEL ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 var(--space-4);
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--border-color);
}

.header__logo h1 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--primary-blue);
    font-weight: 800;
}

.navbar {
    margin-left: auto;
}

.navbar__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
}

/* ==================== BURGER MENU (MOBILE ONLY) ==================== */
.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    margin-left: auto;
}

.burger-line {
    width: 100%;
    height: 3px;
    background-color: var(--primary-blue);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Animation du burger en X */
.burger-menu.active .burger-line:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.burger-menu.active .burger-line:nth-child(2) {
    opacity: 0;
}

.burger-menu.active .burger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ==================== NAVIGATION LINKS ==================== */
.navbar__link {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: var(--transition-normal);
    position: relative;
}

/* Indicateur de page active moderne */
.navbar__link::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 3px;
    background: var(--primary-blue);
    border-radius: 2px 2px 0 0;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar__link:hover {
    color: var(--primary-blue);
    background: var(--bg-tertiary);
}

.navbar__link.active {
    color: var(--primary-blue);
    background: var(--bg-tertiary);
    font-weight: 600;
}

.navbar__link.active::after,
.navbar__link:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.navbar__link svg {
    width: 20px;
    height: 20px;
    margin-bottom: var(--space-1);
    transition: var(--transition-normal);
}

.navbar__link:hover svg,
.navbar__link.active svg {
    stroke: var(--primary-blue);
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-2xl) var(--spacing-xl) var(--spacing-xl);
    text-align: center;
}

.footer-content {
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition-normal);
    font-weight: 500;
}

.footer-link:hover {
    color: var(--white);
}

.footer-copyright {
    color: var(--gray-400);
    font-size: 0.875rem;
    margin: 0;
}

/* ==================== RESPONSIVE HEADER ==================== */
@media (max-width: 768px) {
    .header {
        padding: var(--space-2) var(--space-3);
        height: 60px;
        flex-wrap: nowrap;
        justify-content: space-between;
    }
    
    .header__logo h1 {
        font-size: 1.25rem;
    }
    
    .burger-menu {
        display: flex;
    }
    
    /* Menu mobile en overlay */
    .navbar {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: calc(100vh - 60px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        margin-left: 0;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    }
    
    .navbar.active {
        transform: translateX(0);
    }
    
    .navbar__menu {
        display: flex;
        flex-direction: column;
        gap: 0;
        width: 100%;
        padding: var(--space-3);
        margin: 0;
    }
    
    .navbar__item {
        width: 100%;
        border-bottom: 1px solid var(--border-light);
    }
    
    .navbar__item:last-child {
        border-bottom: none;
    }
    
    .navbar__link {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: var(--space-3);
        padding: var(--space-3) var(--space-2);
        font-size: 1rem;
        text-align: left;
        border-radius: 0;
        width: 100%;
        transition: all 0.2s ease;
    }
    
    .navbar__link:hover,
    .navbar__link.active {
        background: var(--primary-blue);
        color: white;
    }
    
    .navbar__link::after {
        display: none;
    }
    
    .navbar__link svg {
        width: 24px;
        height: 24px;
        margin-bottom: 0;
        flex-shrink: 0;
    }
    
    .navbar__link:hover svg,
    .navbar__link.active svg {
        stroke: white;
    }
    
    .navbar__link span {
        display: block;
        font-size: 1rem;
        font-weight: 600;
    }
    
    body.menu-open {
        overflow: hidden;
    }
    
    .footer-links {
        flex-direction: column;
        align-items: center;
        gap: var(--space-2);
    }
}

@media (max-width: 480px) {
    .header {
        padding: var(--space-2);
    }
    
    .header__logo h1 {
        font-size: 1.1rem;
    }
    
    .navbar__link {
        padding: var(--space-3) var(--space-2);
        font-size: 0.95rem;
    }
    
    .navbar__link svg {
        width: 22px;
        height: 22px;
    }
    
    .navbar__link span {
        font-size: 0.95rem;
    }
    
    .footer {
        padding: var(--space-4) var(--space-2);
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: var(--space-2);
        justify-content: center;
    }
    
    .footer-link {
        font-size: 0.875rem;
    }
}