/* ===== LAYOUT - HEADER, NAVIGATION, SYSTÈME DE VUES ===== */

/* Header avec menu hamburger */
.app-header {
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.header-content h1 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--primary-shadow);
}

/* Menu hamburger */
.hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.hamburger-menu span {
    width: 30px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: all var(--transition-normal) linear;
    position: relative;
    transform-origin: 1px;
}

.hamburger-menu.active span:first-child {
    transform: rotate(45deg);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(20px);
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg);
}

/* Menu de navigation */
.nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(60, 60, 60, 0.98);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-primary);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.nav-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
}

.nav-menu li {
    border-bottom: 1px solid rgba(95, 99, 104, 0.2);
}

.nav-menu li:last-child {
    border-bottom: none;
}

.nav-link {
    display: block;
    padding: var(--spacing-md) var(--spacing-xl);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.1rem;
    transition: all var(--transition-normal);
}

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

/* ===== SYSTÈME DE VUES ===== */

/* Conteneur principal des vues */
.view {
    display: none;
    min-height: calc(100vh - 80px);
}

.view.active {
    display: block;
    animation: fadeIn var(--transition-normal) ease;
}

.container {
    background: transparent;
    backdrop-filter: none;
    border-radius: 0;
    padding: var(--spacing-xl);
    box-shadow: none;
    border: none;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

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

@media (max-width: 768px) {
    .header-content {
        padding: var(--spacing-md);
    }
    
    .header-content h1 {
        font-size: 1.2rem;
    }
    
    .container {
        padding: var(--spacing-md);
    }
}

@media (min-width: 769px) {
    /* Navigation desktop */
    .nav-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background: transparent;
        border: none;
    }
    
    .nav-menu ul {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-xl);
    }
    
    .nav-menu li {
        border: none;
    }
    
    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        border-radius: var(--radius-round);
        transition: all var(--transition-normal);
    }
    
    .nav-link:hover,
    .nav-link.active {
        background: var(--bg-tertiary);
        color: var(--primary-color);
    }
    
    .hamburger-menu {
        display: none;
    }
}