:root {
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --primary-light: #eff6ff;
    --primary-disabled: #d0e1f7;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --success-color: #10b981;
    --success-light: #ecfdf5;
    --warning-color: #f59e0b;
    --sidebar-width: 260px;
    --drawer-width: 450px;
    --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-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow-x: hidden;
    width: 100vw;
    height: 100vh;
}

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    position: relative;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 20;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: space-between;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-brand svg {
    color: var(--primary-color);
    width: 28px;
    height: 28px;
}

.sidebar-brand h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.mobile-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
}

.nav-links {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition);
    cursor: pointer;
}

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

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

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

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Mobile Sidebar Overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(2px);
    z-index: 15;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.mobile-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
}

.topbar {
    min-height: 72px;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    z-index: 5;
    position: sticky;
    top: 0;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    margin-right: 1rem;
}

.topbar-left {
    display: flex;
    align-items: center;
}

.topbar-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.admin-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.admin-name {
    font-weight: 500;
    font-size: 0.875rem;
}

.avatar-circle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.view-content {
    flex: 1;
    padding: 2rem;
    display: none;
    animation: fadeIn 0.3s ease;
}

.view-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dashboard View */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

.stat-info .stat-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-info .stat-value {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon.primary {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.stat-icon.success {
    background-color: var(--success-light);
    color: var(--success-color);
}

.stat-icon.warning {
    background-color: #fef3c7;
    color: var(--warning-color);
}

.stat-icon.danger {
    background-color: #fee2e2;
    color: var(--danger-color);
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

/* Tables & Lists */
.card {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 2rem;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.table-responsive {
    overflow-x: auto;
    width: 100%;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    min-width: 600px;
}

th {
    padding: 0.75rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

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

tbody tr {
    transition: background-color var(--transition);
}

tbody.clickable tr {
    cursor: pointer;
}

tbody.clickable tr:hover {
    background-color: var(--bg-color);
}

.user-cell {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-cell .avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.user-cell .user-info p {
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
}

.user-cell .user-info span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
}

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

.badge.danger {
    background-color: #fee2e2;
    color: var(--danger-color);
}

.badge.primary {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.badge.warning {
    background-color: #fef3c7;
    color: var(--warning-color);
}

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

.badge.sub-status-inactive {
    background-color: var(--border-color);
    color: var(--text-secondary);
}

.badge.sub-status-expired {
    background-color: #fee2e2;
    color: var(--danger-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    white-space: nowrap;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.9;
}

.btn.is-loading {
    pointer-events: none;
}

.btn-spinner {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-top-color: rgba(255, 255, 255, 1);
    animation: btnSpin 0.8s linear infinite;
}

.btn-outline .btn-spinner {
    border-color: rgba(15, 23, 42, 0.25);
    border-top-color: rgba(15, 23, 42, 0.75);
}

@keyframes btnSpin {
    to {
        transform: rotate(360deg);
    }
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}
.btn-primary:disabled {
    background-color: var(--primary-disabled);
    color: rgb(250, 250, 250);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

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

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

/* Subscription Packages */
.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.package-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    background-color: var(--surface-color);
    transition: all var(--transition);
    cursor: pointer;
    position: relative;
    display: flex;
    flex-direction: column;
}

.package-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.package-card.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.package-header {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.package-title {
    font-weight: 600;
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.package-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.package-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.package-features {
    list-style: none;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.package-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.package-features li svg {
    color: var(--success-color);
    flex-shrink: 0;
}

/* Drawer */
.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(2px);
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.drawer-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.drawer {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: var(--drawer-width);
    max-width: 100vw;
    background-color: var(--surface-color);
    box-shadow: -10px 0 15px -3px rgba(0, 0, 0, 0.1);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.drawer-overlay.active .drawer {
    transform: translateX(0);
}

.drawer-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

.drawer-title {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.drawer-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-full);
    transition: background-color var(--transition);
}

.drawer-close:hover {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

.drawer-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.drawer-section {
    margin-bottom: 2rem;
}

.drawer-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
    background-color: var(--surface-color);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control[type="file"] {
    padding: 0.5rem;
}

.form-control[type="file"]::file-selector-button {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    cursor: pointer;
    margin-right: 1rem;
    transition: all var(--transition);
    font-weight: 500;
    color: var(--text-primary);
}

.form-control[type="file"]::file-selector-button:hover {
    background-color: var(--border-color);
}

/* Hide default checkbox */
.form-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 50px;
  height: 26px;
  background: #dbeafe; /* light blue background */
  border-radius: 999px;
  position: relative;
  cursor: pointer;
  outline: none;
  transition: background 0.3s ease;
}

/* Toggle circle */
.form-checkbox::before {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  top: 3px;
  left: 4px;
  background: #ffffff;
  border-radius: 50%;
  transition: transform 0.3s ease;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

/* Checked state */
.form-checkbox:checked {
  background: #60a5fa; /* brighter blue */
}

/* Move the toggle */
.form-checkbox:checked::before {
  transform: translateX(24px);
}

/* Optional: hover effect */

/* Optional: active press feel */
.form-checkbox:active::before {
  width: 24px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #cbd5e1;
    transition: .4s;
    border-radius: 34px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked+.toggle-slider {
    background-color: var(--primary-color);
}

input:checked+.toggle-slider:before {
    transform: translateX(20px);
}

/* Device Item */
.device-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    background-color: var(--surface-color);
}

.device-icon-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-grow: 1;
}

.device-icon svg {
    width: 24px;
    height: 24px;
    color: var(--text-secondary);
}

.device-info p {
    font-weight: 500;
    font-size: 0.875rem;
}

.device-info span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.device-stats {
    text-align: right;
    font-size: 0.875rem;
    padding-right: 1rem;
    border-right: 1px solid var(--border-color);
}

.device-stats div {
    margin-bottom: 0.25rem;
}

/* Modal for adding user */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(2px);
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.2s ease;
}

.modal {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transform: scale(0.95);
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-footer {
    padding: 1rem 1.5rem;
    background-color: var(--bg-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

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

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        transform: translateX(-100%);
    }

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

    .mobile-menu-btn {
        display: block;
    }

    .mobile-close {
        display: block;
    }

    .topbar {
        padding: 0 1rem;
    }

    .view-content {
        padding: 1rem;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .card-header .btn {
        width: 100%;
    }

    .device-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .device-stats {
        text-align: left;
        border-right: none;
        padding-right: 0;
        margin-top: 0.5rem;
        margin-bottom: 0.5rem;
    }

    .device-action {
        width: 100%;
    }

    .device-action .btn {
        width: 100%;
    }

    .admin-name {
        display: none;
    }

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