/* Layout Principal */
.app-layout {
    display: flex;
    min-height: 100vh;
    background: var(--bg-secondary);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-lg);
    overflow-y: auto;
    transition: width var(--transition-base), transform var(--transition-base);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-xl);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--spacing-xl);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-logo-text {
    transition: opacity var(--transition-base);
}

.sidebar.collapsed .sidebar-logo-text {
    opacity: 0;
    width: 0;
}

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--white);
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

/* Navigation Menu */
.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 0.875rem var(--spacing-md);
    color: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--white);
    transform: translateX(-100%);
    transition: transform var(--transition-fast);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    transform: translateX(4px);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    font-weight: 600;
}

.nav-link.active::before {
    transform: translateX(0);
}

.nav-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-text {
    white-space: nowrap;
    overflow: hidden;
    transition: opacity var(--transition-base);
}

.sidebar.collapsed .nav-text {
    opacity: 0;
    width: 0;
}

.nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: var(--white);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 20px;
    text-align: center;
}

.sidebar.collapsed .nav-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    min-width: 18px;
    height: 18px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Divider */
.nav-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: var(--spacing-md) 0;
}

.nav-label {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
    transition: opacity var(--transition-base);
}

.sidebar.collapsed .nav-label {
    opacity: 0;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: margin-left var(--transition-base);
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    min-width: 0; /* ← crucial avec flexbox, empêche le flex item de déborder */
}

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.breadcrumb-separator {
    color: var(--gray-400);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-search {
    position: relative;
}

.header-search-input {
    width: 300px;
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    background: var(--gray-50);
}

.header-search-input:focus {
    background: var(--white);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.header-search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    pointer-events: none;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-action {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    background: transparent;
    transition: all var(--transition-fast);
}

.header-action:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.header-action-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border: 2px solid var(--white);
    border-radius: 50%;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 0.5rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-menu:hover {
    background: var(--gray-100);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
    font-size: 1rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Page Content */
/* Empêche tout débordement horizontal global */
.page-content {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    box-sizing: border-box;
}

.animate-fade-in {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    box-sizing: border-box;
}

/* Sécurité globale */
*, *::before, *::after {
    box-sizing: border-box;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: calc(var(--z-fixed) - 1);
    }

    .sidebar.mobile-open ~ .sidebar-overlay {
        display: block;
    }

    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: var(--radius);
        background: transparent;
        color: var(--text-primary);
        cursor: pointer;
    }

    .mobile-menu-toggle:hover {
        background: var(--gray-100);
    }

    .header-search-input {
        width: 200px;
    }
}

@media (max-width: 768px) {
    .header-title {
        font-size: 1.25rem;
    }

    .breadcrumb {
        display: none;
    }

    .header-search {
        display: none;
    }

    .user-info {
        display: none;
    }

    .page-content {
        padding: var(--spacing-md);
    }
}

/* Mobile : sidebar cachée par défaut */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        position: fixed;
        z-index: 1000;
        height: 100%;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    .sidebar-overlay.active {
        display: block;
    }
}