/* ═══════════════════════════════════════════════════════
   DASHBOARD LAYOUT — Sidebar + Header + Content
   Inspired by Healthai reference design
   ═══════════════════════════════════════════════════════ */

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

/* ─── Sidebar ─── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: var(--z-sticky);
    transition: transform var(--transition-base);
}

.sidebar-brand {
    display: flex; align-items: center; gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
}
.sidebar-brand-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--teal-400), var(--teal-600));
    border-radius: var(--radius-lg);
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 20px;
}
.sidebar-brand-name {
    font-size: var(--font-lg);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
}
.sidebar-brand-name span {
    color: var(--color-primary);
}

/* ─── Sidebar Navigation ─── */
.sidebar-nav {
    flex: 1; overflow-y: auto;
    padding: var(--space-base) var(--space-md);
}
.sidebar-section {
    margin-bottom: var(--space-lg);
}
.sidebar-section-title {
    font-size: var(--font-xs);
    font-weight: var(--fw-semibold);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    margin-bottom: 2px;
}
.nav-item:hover {
    background: var(--bg-hover);
    color: var(--color-primary);
}
.nav-item.active {
    background: var(--color-primary);
    color: var(--text-inverse);
    box-shadow: 0 2px 8px rgba(0, 150, 136, 0.3);
}
.nav-item.active svg { stroke: white; }
.nav-item svg {
    width: 20px; height: 20px; flex-shrink: 0;
    stroke: currentColor;
}
.nav-item .nav-badge {
    margin-left: auto;
    background: var(--color-danger);
    color: white;
    font-size: 10px;
    padding: 2px 7px;
    border-radius: var(--radius-pill);
    font-weight: var(--fw-bold);
}

/* ─── Sidebar Footer ─── */
.sidebar-footer {
    padding: var(--space-base) var(--space-lg);
    border-top: 1px solid var(--gray-100);
}
.sidebar-user {
    display: flex; align-items: center; gap: 12px;
    padding: 10px; border-radius: var(--radius-lg);
}
.sidebar-user-info {
    flex: 1; min-width: 0;
}
.sidebar-user-name {
    font-size: var(--font-sm); font-weight: var(--fw-semibold);
    color: var(--text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sidebar-user-role {
    font-size: var(--font-xs); color: var(--text-muted);
    text-transform: capitalize;
}

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

/* ─── Top Header ─── */
.top-header {
    height: var(--header-height);
    background: var(--bg-card);
    border-bottom: 1px solid var(--gray-100);
    display: flex; align-items: center;
    padding: 0 var(--space-xl);
    gap: var(--space-lg);
    position: sticky; top: 0;
    z-index: var(--z-sticky);
}

.search-box {
    display: flex; align-items: center; gap: 10px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-pill);
    padding: 8px 18px;
    flex: 1; max-width: 480px;
    transition: all var(--transition-fast);
}
.search-box:focus-within {
    border-color: var(--color-primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(0, 150, 136, 0.1);
}
.search-icon { color: var(--text-muted); flex-shrink: 0; }
.search-box input {
    flex: 1; font-size: var(--font-sm);
    color: var(--text-primary);
}

.header-actions {
    display: flex; align-items: center; gap: var(--space-md);
    margin-left: auto;
}

.header-icon-btn {
    position: relative;
    width: 40px; height: 40px;
    border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}
.header-icon-btn:hover { background: var(--gray-100); color: var(--text-primary); }

.notification-dot {
    position: absolute; top: 8px; right: 8px;
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--color-danger);
    border: 2px solid var(--bg-card);
}

.header-user {
    display: flex; align-items: center; gap: 10px;
    padding: 6px 12px 6px 6px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: background var(--transition-fast);
}
.header-user:hover { background: var(--gray-50); }
.user-name { font-size: var(--font-sm); font-weight: var(--fw-semibold); }
.user-email { font-size: var(--font-xs); color: var(--text-muted); }

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

/* ─── Page Header ─── */
.page-header {
    display: flex; align-items: flex-start; justify-content: space-between;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap; gap: var(--space-base);
}
.page-header h1 {
    font-size: var(--font-3xl); font-weight: var(--fw-bold);
    color: var(--text-primary); line-height: 1.3;
}
.page-header p {
    font-size: var(--font-sm); color: var(--text-secondary);
    margin-top: 4px;
}

/* ─── Stats Grid ─── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

/* ─── Dashboard Grid ─── */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}
.dashboard-grid .span-2 { grid-column: span 2; }
.dashboard-grid .span-3 { grid-column: span 3; }

/* ─── Quick Actions ─── */
.quick-actions {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}
.quick-action {
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    padding: var(--space-lg) var(--space-base);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    color: var(--text-secondary);
    font-size: var(--font-xs); font-weight: var(--fw-medium);
    transition: all var(--transition-base);
    text-align: center;
}
.quick-action svg { width: 24px; height: 24px; }
.quick-action:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-bg);
    transform: translateY(-2px);
}

/* ─── Activity List ─── */
.activity-list { display: flex; flex-direction: column; }
.activity-item {
    display: flex; align-items: center; gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--text-primary);
    transition: background var(--transition-fast);
}
.activity-item:last-child { border-bottom: none; }
.activity-item:hover { background: var(--gray-50); border-radius: var(--radius-md); padding-left: 8px; }
.activity-icon {
    width: 40px; height: 40px; border-radius: var(--radius-lg);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.activity-icon.session { background: var(--teal-50); color: var(--teal-600); }
.activity-icon.payment { background: var(--color-success-bg); color: var(--color-success); }
.activity-icon.message { background: var(--color-info-bg); color: var(--color-info); }
.activity-info { flex: 1; min-width: 0; }
.activity-title { font-size: var(--font-sm); font-weight: var(--fw-semibold); }
.activity-meta  { font-size: var(--font-xs); color: var(--text-muted); }
.activity-time  { font-size: var(--font-xs); color: var(--text-muted); white-space: nowrap; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
    .dashboard-grid { grid-template-columns: 1fr 1fr; }
    .dashboard-grid .span-2 { grid-column: span 2; }
}
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-xl); }
    .main-content { margin-left: 0; }
    .content-area { padding: var(--space-base); }
    .dashboard-grid { grid-template-columns: 1fr; }
    .dashboard-grid .span-2 { grid-column: span 1; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .page-header { flex-direction: column; }
    .search-box { max-width: 100%; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
}