/* ============================================================
   DASHBOARD LAYOUT — Sidebar + Topbar + Content Grid
   ============================================================ */

/* ── App Layout ── */
.app {
    display: flex;
    min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
    width: var(--sidebar-width);
    background: rgba(10, 22, 40, 0.97);
    backdrop-filter: blur(12px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: width var(--transition-slow);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-height: var(--topbar-height);
}

.sidebar-logo {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-info));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-logo svg {
    width: 22px;
    height: 22px;
    color: white;
}

.sidebar-brand {
    flex: 1;
    min-width: 0;
}

.sidebar-brand h2 {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-brand span {
    font-size: 0.6875rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Nav Groups */
.sidebar-nav {
    flex: 1;
    padding: var(--space-md) var(--space-sm);
}

.nav-group {
    margin-bottom: var(--space-lg);
}

.nav-group__label {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 10px var(--space-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 400;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
}

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

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

.nav-item:hover svg {
    opacity: 1;
}

.nav-item.active {
    background: rgba(59, 130, 246, 0.12);
    color: var(--color-primary);
    font-weight: 500;
}

.nav-item.active svg {
    opacity: 1;
    color: var(--color-primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    bottom: 6px;
    width: 3px;
    background: var(--color-primary);
    border-radius: 0 3px 3px 0;
}

.nav-item__badge {
    margin-left: auto;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-danger);
}

/* Sub-items */
.nav-sub {
    padding-left: var(--space-xl);
}

.nav-sub .nav-item {
    font-size: 0.8125rem;
    padding: 8px var(--space-md);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-base);
}

.sidebar-user:hover {
    background: var(--bg-surface-alt);
}

.sidebar-user__info {
    flex: 1;
    min-width: 0;
}

.sidebar-user__name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.sidebar-user__role {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ── Main Content ── */
.main {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Top Bar ── */
.topbar {
    height: var(--topbar-height);
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.topbar-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
}

.topbar-breadcrumb span {
    color: var(--text-muted);
}

.topbar-breadcrumb a {
    color: var(--text-secondary);
}

.topbar-breadcrumb .current {
    color: var(--text-primary);
    font-weight: 500;
}

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

.topbar-right .live-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
    color: var(--color-success);
    font-weight: 500;
}

.topbar-right .live-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

/* Hamburger for mobile */
.sidebar-toggle {
    display: none;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
}

.sidebar-toggle svg {
    width: 24px;
    height: 24px;
}

/* ── Content Area ── */
.content {
    flex: 1;
    padding: var(--space-xl);
}

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

.content-header h1 {
    font-size: 1.5rem;
}

.content-header p {
    margin-top: 4px;
    font-size: 0.875rem;
}

/* ── Dashboard Grids ── */
.grid-kpi {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.grid-2col {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.grid-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.grid-equal {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.full-width {
    margin-bottom: var(--space-xl);
}

/* ── Page Header with Tabs ── */
.page-header {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.page-header .tabs {
    max-width: 400px;
}

/* ── Responsive ── */
@media (max-width: 1200px) {
    .grid-kpi {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-2col {
        grid-template-columns: 1fr;
    }

    .grid-3col {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

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

    .sidebar-toggle {
        display: block;
    }

    .main {
        margin-left: 0;
    }

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

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

    .grid-kpi {
        grid-template-columns: 1fr;
    }

    .grid-3col {
        grid-template-columns: 1fr;
    }

    .grid-equal {
        grid-template-columns: 1fr;
    }
}

/* ── Sidebar overlay for mobile ── */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

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