/* ============================================
   Layout — Sidebar, Header, Grid principal
   ============================================ */

.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-default);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-smooth);
}

.sidebar-header {
    padding: var(--space-lg) var(--space-lg) var(--space-md);
    border-bottom: 1px solid var(--border-default);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sidebar-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--color-accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 900;
    color: white;
    font-family: var(--font-display);
}

.sidebar-logo-text {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 1.2rem;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.sidebar-logo-sub {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

/* Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--space-md) var(--space-sm);
    overflow-y: auto;
}

.nav-section-title {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    padding: var(--space-md) var(--space-md) var(--space-xs);
    font-weight: 600;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 10px var(--space-md);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
    text-decoration: none;
}

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

.nav-link.active {
    color: var(--text-primary);
    background: var(--color-accent-bg);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--color-accent);
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    animation: slideInRight 0.3s ease both;
}

.nav-link-icon {
    width: 20px;
    height: 20px;
    opacity: 0.7;
    flex-shrink: 0;
}

.nav-link.active .nav-link-icon {
    opacity: 1;
}

/* Sidebar footer */
.sidebar-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-default);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ---- Main content ---- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

/* Header */
.page-header {
    position: sticky;
    top: 0;
    z-index: 50;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    background: rgba(9, 9, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-default);
}

[data-theme="light"] .page-header {
    background: rgba(244, 244, 245, 0.85);
}

.page-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Mobile hamburger */
.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
}

.hamburger:hover {
    background: var(--bg-hover);
}

.hamburger svg {
    width: 24px;
    height: 24px;
}

/* Overlay mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 99;
}

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

/* Page content */
.page-content {
    padding: var(--space-xl);
    max-width: 1400px;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .page-content {
        padding: var(--space-lg);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

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

    .hamburger {
        display: block;
    }

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

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