/* ============================================================
   NEXUS — Layout CSS Premium
   Grid principal, sidebar, header, zone de contenu, transitions
   Version corrigée avec accessibilité et responsive améliorés
   ============================================================ */

/* ---------- Layout principal ---------- */
.app-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    grid-template-rows: 64px 1fr;
    grid-template-areas:
        "sidebar header"
        "sidebar main";
    min-height: 100vh;
    min-height: 100dvh;
    transition: grid-template-columns var(--transition-base);
}

/* ---------- Sidebar ---------- */
.sidebar {
    grid-area: sidebar;
    background-color: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    height: 100dvh;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: var(--z-sidebar);
    transition: width var(--transition-base);
}

.sidebar-brand {
    padding: var(--spacing-lg) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sidebar-brand-logo {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: block;
}

.sidebar-brand-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent-bg);
    color: var(--color-accent);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.sidebar-brand-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: 1px;
    white-space: nowrap;
    transition: opacity var(--transition-base);
}

/* Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
    overflow-x: hidden;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px var(--spacing-md);
    color: var(--color-text-secondary);
    border-left: 3px solid transparent;
    border: none;
    background: none;
    transition: background-color var(--transition-fast),
                color var(--transition-fast),
                border-color var(--transition-fast);
    width: 100%;
    text-align: left;
    font-size: var(--font-size-sm);
    white-space: nowrap;
    position: relative;
    cursor: pointer;
}

.nav-item:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
    text-decoration: none;
}

.nav-item:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
}

.nav-item.active {
    background-color: var(--color-accent-bg);
    color: var(--color-accent);
    border-left-color: var(--color-accent);
}

.nav-item.active::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--color-accent);
    border-radius: 3px 0 0 3px;
}

.nav-item-icon {
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-item-icon svg {
    width: 20px;
    height: 20px;
    display: block;
}

.nav-item-label {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-item-badge {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    min-width: 24px;
    text-align: center;
    flex-shrink: 0;
}

/* Pied de sidebar */
.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-align: center;
    white-space: nowrap;
}

/* ---------- Header ---------- */
.header {
    grid-area: header;
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    gap: var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: var(--z-header);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 0;
}

.header-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

/* Badges d'état du header */
.header-status {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background-color var(--transition-fast),
                color var(--transition-fast);
}

.header-status.online {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.header-status.offline {
    background-color: var(--color-error-bg);
    color: var(--color-error);
}

.header-status.connecting {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

/* Boutons du header */
.header-button {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: background-color var(--transition-fast),
                color var(--transition-fast),
                transform var(--transition-fast);
    position: relative;
    cursor: pointer;
    border: none;
    background: none;
}

.header-button:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
}

.header-button:active {
    transform: scale(0.95);
}

.header-button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.header-button svg {
    width: 20px;
    height: 20px;
    display: block;
    flex-shrink: 0;
}

.header-button-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    background-color: var(--color-error);
    border-radius: var(--radius-full);
    border: 2px solid var(--color-bg-secondary);
    animation: pulse 2s ease-in-out infinite;
}

/* ---------- Zone principale ---------- */
.main-content {
    grid-area: main;
    padding: var(--spacing-xl);
    overflow-y: auto;
    min-height: calc(100vh - 64px);
    min-height: calc(100dvh - 64px);
}

.main-content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.main-content-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.5px;
}

.main-content-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ---------- Grid de contenu ---------- */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.content-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.content-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.content-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

/* ---------- Sidebar compacte ---------- */
.app-container.sidebar-compact {
    grid-template-columns: 64px 1fr;
}

.app-container.sidebar-compact .sidebar-brand-name,
.app-container.sidebar-compact .nav-item-label,
.app-container.sidebar-compact .nav-item-badge,
.app-container.sidebar-compact .sidebar-footer span {
    display: none;
}

.app-container.sidebar-compact .nav-item {
    justify-content: center;
    padding: 12px 0;
}

.app-container.sidebar-compact .nav-item.active::after {
    display: none;
}

.app-container.sidebar-compact .sidebar-brand {
    justify-content: center;
    padding: var(--spacing-lg) 0;
}

/* ---------- Sidebar mobile toggle ---------- */
.sidebar-toggle {
    display: none;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    border: none;
    background: none;
    transition: background-color var(--transition-fast),
                color var(--transition-fast);
}

.sidebar-toggle:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
}

.sidebar-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.sidebar-toggle svg {
    width: 20px;
    height: 20px;
    display: block;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .content-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .content-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
        grid-template-rows: 56px 1fr;
        grid-template-areas:
            "header"
            "main";
    }

    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        width: 280px;
        height: 100vh;
        height: 100dvh;
        transition: left var(--transition-base);
        z-index: var(--z-modal);
        box-shadow: var(--shadow-lg);
    }

    .sidebar.open {
        left: 0;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
        z-index: calc(var(--z-modal) - 1);
        opacity: 0;
        transition: opacity var(--transition-base);
    }

    .sidebar-overlay.open {
        display: block;
        opacity: 1;
    }

    .header {
        padding: 0 var(--spacing-md);
    }

    .sidebar-toggle {
        display: flex;
    }

    .main-content {
        padding: var(--spacing-md);
        min-height: calc(100vh - 56px);
        min-height: calc(100dvh - 56px);
    }

    .content-grid-2,
    .content-grid-3,
    .content-grid-4 {
        grid-template-columns: 1fr;
    }

    .main-content-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header-status {
        display: none; /* Masquer le statut sur très petit écran */
    }
}

@media (max-width: 480px) {
    .header-title {
        font-size: var(--font-size-base);
    }

    .main-content-title {
        font-size: var(--font-size-xl);
    }

    .header-status {
        font-size: 10px;
        padding: 3px 8px;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- Accessibilité ---------- */
@media (prefers-reduced-motion: reduce) {
    .app-container,
    .sidebar,
    .nav-item,
    .header-button,
    .header-status,
    .sidebar-overlay {
        transition: none !important;
        animation: none !important;
    }
}

/* ---------- Impression ---------- */
@media print {
    .sidebar,
    .header,
    .sidebar-overlay,
    .sidebar-toggle {
        display: none !important;
    }
    
    .app-container {
        display: block;
    }
    
    .main-content {
        padding: 0;
        min-height: auto;
    }
}
/* Masquer le hamburger sur desktop */
.header-menu-button {
    display: none;
}

/* Sur mobile (moins de 768px) */
@media (max-width: 768px) {
    .header-menu-button {
        display: flex;
    }
    
    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        bottom: 0;
        width: 280px;
        z-index: 100;
        transition: left 0.3s ease;
    }
    
    .sidebar.open {
        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: 90;
    }
    
    .sidebar-overlay.open {
        display: block;
    }
}