:root {
    --primary: #5E4AD1;
    --primary-light: #E5DEFF;
    --primary-gradient: linear-gradient(135deg, #5E4AD1, #2563EB);
    
    --bg-color: #F1F5F9;
    --surface: rgba(255, 255, 255, 0.9);
    --surface-solid: #FFFFFF;
    
    --text-main: #1E293B;
    --text-muted: #64748B;
    
    --success: #22C55E;
    --success-light: #DCFCE7;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --danger: #EF4444;
    --danger-light: #FEE2E2;

    --blue: #3B82F6;
    --light-blue: #93C5FD;
    --yellow: #FACC15;
    --grey: #CBD5E1;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --shadow-hover: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    --font-head: 'Manrope', sans-serif;
    --font-body: 'Inter', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(94,74,209,0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(59,130,246,0.1) 0px, transparent 50%);
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
}

.app-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
    padding: 24px;
    gap: 24px;
    max-width: 1600px;
    margin: 0 auto;
}

/* --- Sidebar --- */
.sidebar {
    background: var(--surface);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: var(--shadow-glass);
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 48px);
    position: sticky;
    top: 24px;
    overflow-y: auto;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary);
    margin-bottom: 24px;
}

.sidebar-logo h2 {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 24px;
    letter-spacing: -0.5px;
}

.logo-icon {
    font-size: 32px;
}

.doctor-profile {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.doc-avatar {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-md);
    object-fit: cover;
    box-shadow: var(--shadow-md);
    border: 3px solid var(--surface-solid);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-item:hover {
    background: var(--primary-light);
    color: var(--primary);
    transform: translateX(4px);
}

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.nav-item.active .material-symbols-outlined {
    font-variation-settings: 'FILL' 1;
}

.sidebar-bottom {
    margin-top: auto;
}

/* --- Main Content --- */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--surface);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 16px 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-color);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    width: 360px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.search-bar:focus-within {
    background: var(--surface-solid);
    border-color: var(--primary-light);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.search-bar input {
    border: none;
    background: transparent;
    outline: none;
    font-family: var(--font-body);
    font-size: 15px;
    color: var(--text-main);
    width: 100%;
}

.search-bar .material-symbols-outlined {
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    position: relative;
}

.icon-btn:hover {
    background: var(--bg-color);
    color: var(--primary);
}

.notification-btn .badge {
    position: absolute;
    top: 6px;
    right: 8px;
    background: var(--danger);
    color: white;
    font-size: 10px;
    font-weight: 700;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 2px solid var(--surface-solid);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding-left: 12px;
    border-left: 1px solid var(--grey);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.main-column {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.side-column {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Metric Cards */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.metric-card {
    background: var(--surface-solid);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(0,0,0,0.03);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.metric-card.primary-card {
    background: var(--primary);
    color: white;
}

.metric-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.metric-header h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
}

.primary-card .metric-header h3 {
    color: rgba(255,255,255,0.9);
}

.metric-header .material-symbols-outlined {
    color: var(--text-muted);
    cursor: pointer;
}

.primary-card .metric-header .material-symbols-outlined {
    color: rgba(255,255,255,0.7);
}

.metric-value {
    font-family: var(--font-head);
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
}

.metric-value.dark-text {
    color: var(--text-main);
}

.metric-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.metric-footer.center {
    justify-content: center;
}

.metric-footer .label {
    font-size: 13px;
    color: var(--text-muted);
}

.primary-card .metric-footer .label {
    color: rgba(255,255,255,0.8);
}

.trend {
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 700;
}

.trend.positive {
    background: rgba(108, 248, 187, 0.2);
    color: #00FF85; /* adjusting for dark bg */
}

.trend.warning {
    background: var(--warning-light);
    color: var(--warning);
}

.gauge-container {
    position: relative;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.gauge-value {
    position: absolute;
    font-family: var(--font-head);
    font-size: 36px;
    font-weight: 800;
    color: var(--text-main);
    top: 50%;
    transform: translateY(-20%);
}

/* Cards Common */
.card {
    background: var(--surface-solid);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.03);
}

.card-header, .section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.card-header h2, .section-header h3 {
    font-family: var(--font-head);
    font-weight: 700;
    color: var(--text-main);
}

.card-header h2 { font-size: 20px; }
.section-header h3 { font-size: 18px; }

.section-header .material-symbols-outlined {
    color: var(--text-muted);
    cursor: pointer;
}

.btn-primary-sm {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary-sm:hover {
    background: #462DB8;
}

/* Chart Section */
.chart-controls {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 20px;
}

.chart-controls h3 {
    font-size: 16px;
    font-weight: 600;
}

.chart-legend {
    display: flex;
    gap: 16px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.dot.blue { background: var(--blue); }
.dot.light-blue { background: var(--light-blue); }
.dot.yellow { background: var(--yellow); }
.dot.grey { background: var(--grey); }
.dot.red { background: var(--danger); }

.chart-container {
    height: 280px;
    width: 100%;
}

/* History Table */
.history-table {
    width: 100%;
    border-collapse: collapse;
}

.history-table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 1px solid var(--grey);
}

.history-table td {
    padding: 16px;
    font-size: 14px;
    color: var(--text-main);
    border-bottom: 1px solid rgba(0,0,0,0.03);
}

.history-table tr:last-child td {
    border-bottom: none;
}

.status-badge {
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.status-badge.overdue {
    background: var(--danger-light);
    color: var(--danger);
}

.status-badge.completed {
    background: var(--success-light);
    color: var(--success);
}

/* Appointments */
.appointments-section {
    background: var(--surface-solid);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.03);
}

.appointment-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.appointment-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--bg-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.appointment-card:hover {
    transform: translateX(4px);
}

.appointment-card.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 8px 24px rgba(94, 74, 209, 0.2);
}

.appt-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.appt-info h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.appointment-card.active .appt-info h4 {
    color: white;
}

.appt-info p {
    font-size: 13px;
    color: var(--text-muted);
}

.appointment-card.active .appt-info p {
    color: rgba(255,255,255,0.8);
}

.appointment-card .arrow {
    margin-left: auto;
    color: white;
}

/* Tasks */
.tasks-section {
    background: var(--surface-solid);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.03);
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.task-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--grey);
    cursor: pointer;
    transition: all 0.2s ease;
}

.task-item:hover {
    border-color: var(--primary-light);
    background: var(--surface-low);
}

.task-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

.task-content {
    flex: 1;
}

.task-content h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 2px;
}

.task-content p {
    font-size: 13px;
    color: var(--text-muted);
}

.task-item input[type="checkbox"]:checked ~ .task-content h4 {
    text-decoration: line-through;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1200px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        display: none; /* simple hidden for mobile in this demo */
    }

    .metrics-row {
        grid-template-columns: 1fr;
    }

    .search-bar {
        width: 200px;
    }
}

/* Mobile Sidebar Drawer Overlay System */
.hamburger-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}
.hamburger-menu-btn:hover {
    background: var(--bg-color);
    color: var(--primary);
}

@media (max-width: 768px) {
    .hamburger-menu-btn {
        display: flex;
    }
    
    .sidebar {
        display: flex !important;
        position: fixed;
        left: -280px;
        top: 0;
        bottom: 0;
        height: 100vh;
        width: 260px;
        z-index: 9999;
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
        background: var(--surface-solid);
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.15);
    }
    
    .sidebar.drawer-open {
        left: 0;
    }

    /* Backdrop for mobile drawer */
    .sidebar-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.4);
        backdrop-filter: blur(4px);
        z-index: 9998;
        display: none;
    }
    .sidebar-backdrop.active {
        display: block;
    }
}


/* Tooltip & Charts */
#chartjs-tooltip {
    opacity: 0;
    position: absolute;
    background: var(--surface-solid);
    border: 1px solid var(--grey);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    pointer-events: none;
    transform: translate(-50%, 0);
    transition: all 0.1s ease;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    font-size: 13px;
    font-family: var(--font-body);
    color: var(--text-main);
}
#chartjs-tooltip .tooltip-title {
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--primary);
}
#chartjs-tooltip .tooltip-body {
    color: var(--text-muted);
}

.chart-filter {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--grey);
    background: var(--surface-solid);
    font-family: var(--font-body);
    color: var(--text-main);
    outline: none;
    cursor: pointer;
}

/* Modals & Forms */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}
.modal-overlay.active {
    display: flex;
}
.modal-content {
    background: var(--surface-solid);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 400px;
    padding: 24px;
    box-shadow: var(--shadow-hover);
    transform: scale(0.95);
    opacity: 0;
    transition: all 0.3s ease;
}
.modal-overlay.active .modal-content {
    transform: scale(1);
    opacity: 1;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.modal-header h2 {
    font-size: 18px;
}
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.form-control {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--grey);
    background: var(--bg-color);
    font-family: var(--font-body);
    font-size: 14px;
    color: var(--text-main);
    outline: none;
    transition: border-color 0.2s;
}
.form-control:focus {
    border-color: var(--primary);
    background: var(--surface-solid);
}
.staff-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(0,0,0,0.03);
}
.staff-item:last-child {
    border-bottom: none;
}
.staff-info h4 {
    font-size: 14px;
    font-weight: 600;
}
.staff-info p {
    font-size: 12px;
    color: var(--text-muted);
}

/* Dropdowns */
.dropdown-menu {
    position: absolute;
    top: 70px;
    background: var(--surface-solid);
    border: 1px solid var(--grey);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    min-width: 200px;
    display: none;
    flex-direction: column;
    z-index: 1000;
}
.dropdown-menu.active {
    display: flex;
}
.dropdown-header {
    padding: 12px 16px;
    font-weight: 700;
    border-bottom: 1px solid var(--grey);
}
.dropdown-item {
    padding: 12px 16px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}
.dropdown-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}