:root {
     --sidebar-width: 260px;
     --header-height: 64px
 }

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

 html {
     overflow-x: hidden;
     scroll-behavior: smooth
 }

 body {
     font-family: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
     background: #F1F5F9;
     color: #1e293b;
     overflow-x: hidden;
     -webkit-font-smoothing: antialiased;
     min-height: 100vh
 }

 html.dark body {
     background: #0F172A;
     color: #E2E8F0
 }

 ::-webkit-scrollbar {
     width: 6px;
     height: 6px
 }

 ::-webkit-scrollbar-track {
     background: transparent
 }

 ::-webkit-scrollbar-thumb {
     background: #CBD5E1;
     border-radius: 99px
 }

 html.dark ::-webkit-scrollbar-thumb {
     background: #334155
 }

 .sidebar {
     position: fixed;
     top: 0;
     left: 0;
     width: var(--sidebar-width);
     height: 100vh;
     background: #fff;
     border-right: 1px solid #E2E8F0;
     z-index: 1000;
     display: flex;
     flex-direction: column;
     transition: transform .3s cubic-bezier(.4, 0, .2, 1)
 }

 html.dark .sidebar {
     background: #0F172A;
     border-right-color: #1E293B
 }

 @media(max-width:1023px) {
     .sidebar {
         transform: translateX(-100%)
     }

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

 .sidebar-overlay {
     display: none;
     position: fixed;
     inset: 0;
     background: rgba(0, 0, 0, .4);
     z-index: 999
 }

 .sidebar-overlay.active {
     display: block
 }

 .nav-item {
     display: flex;
     align-items: center;
     gap: 12px;
     padding: 10px 16px;
     border-radius: 10px;
     color: #64748B;
     font-size: 14px;
     font-weight: 500;
     cursor: pointer;
     text-decoration: none;
     margin: 0 12px 2px;
     transition: all .15s
 }

 .nav-item:hover {
     background: #F1F5F9;
     color: #334155
 }

 html.dark .nav-item:hover {
     background: #1E293B;
     color: #E2E8F0
 }

 .nav-item.active {
     background: #EFF6FF;
     color: #2563EB;
     font-weight: 600
 }

 html.dark .nav-item.active {
     background: rgba(37, 99, 235, .15);
     color: #60A5FA
 }

 .nav-item .nav-icon {
     width: 20px;
     height: 20px;
     flex-shrink: 0
 }

 .nav-group-title {
     font-size: 11px;
     font-weight: 700;
     color: #94A3B8;
     text-transform: uppercase;
     letter-spacing: .08em;
     padding: 16px 28px 6px
 }

 .header {
     position: fixed;
     top: 0;
     left: var(--sidebar-width);
     right: 0;
     height: var(--header-height);
     background: rgba(255, 255, 255, .88);
     backdrop-filter: blur(12px);
     -webkit-backdrop-filter: blur(12px);
     border-bottom: 1px solid #E2E8F0;
     z-index: 900;
     display: flex;
     align-items: center;
     padding: 0 24px;
     transition: left .3s
 }

 html.dark .header {
     background: rgba(15, 23, 42, .88);
     border-bottom-color: #1E293B
 }

 @media(max-width:1023px) {
     .header {
         left: 0
     }
 }

 .main-content {
     margin-left: var(--sidebar-width);
     padding-top: var(--header-height);
     min-height: 100vh;
     transition: margin-left .3s
 }

 @media(max-width:1023px) {
     .main-content {
         margin-left: 0
     }
 }

 .card {
     background: #fff;
     border: 1px solid #E2E8F0;
     border-radius: 16px
 }

 html.dark .card {
     background: #1E293B;
     border-color: #334155
 }

 .icon-box {
     width: 44px;
     height: 44px;
     border-radius: 12px;
     display: flex;
     align-items: center;
     justify-content: center;
     flex-shrink: 0
 }

 .badge {
     display: inline-flex;
     align-items: center;
     gap: 3px;
     padding: 3px 10px;
     border-radius: 99px;
     font-size: 12px;
     font-weight: 600;
     white-space: nowrap
 }

 .btn {
     display: inline-flex;
     align-items: center;
     justify-content: center;
     gap: 6px;
     padding: 10px 18px;
     border-radius: 10px;
     font-size: 14px;
     font-weight: 600;
     cursor: pointer;
     border: none;
     font-family: inherit;
     transition: background .15s
 }

 .btn-primary {
     background: #2563EB;
     color: #fff
 }

 .btn-primary:hover {
     background: #1D4ED8
 }

 .btn-outline {
     background: #fff;
     color: #334155;
     border: 1px solid #E2E8F0
 }

 html.dark .btn-outline {
     background: #1E293B;
     color: #E2E8F0;
     border-color: #334155
 }

 .btn-outline:hover {
     background: #F8FAFC
 }

 html.dark .btn-outline:hover {
     background: #334155
 }

 .btn-sm {
     padding: 7px 14px;
     font-size: 13px;
     border-radius: 8px
 }

 .btn-danger {
     background: #EF4444;
     color: #fff
 }

 .btn-danger:hover {
     background: #DC2626
 }

 .avatar {
     border-radius: 50%;
     object-fit: cover;
     flex-shrink: 0
 }

 .form-input {
     width: 100%;
     padding: 10px 14px;
     border: 1px solid #E2E8F0;
     border-radius: 10px;
     font-size: 14px;
     font-family: inherit;
     background: #fff;
     color: #1E293B;
     outline: none;
     transition: border-color .15s
 }

 html.dark .form-input {
     background: #0F172A;
     border-color: #334155;
     color: #E2E8F0
 }

 .form-input:focus {
     border-color: #2563EB;
     box-shadow: 0 0 0 3px rgba(37, 99, 235, .08)
 }

 .form-input-icon {
     padding-left: 38px
 }

 .form-input::placeholder {
     color: #94A3B8
 }

 select.form-input {
     appearance: none;
     cursor: pointer;
     background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
     background-repeat: no-repeat;
     background-position: right 12px center;
     padding-right: 32px
 }

 .dropdown-menu {
     position: absolute;
     right: 0;
     top: calc(100% + 6px);
     min-width: 180px;
     background: #fff;
     border: 1px solid #E2E8F0;
     border-radius: 12px;
     box-shadow: 0 12px 32px rgba(0, 0, 0, .1);
     z-index: 500;
     opacity: 0;
     visibility: hidden;
     transform: translateY(-6px);
     transition: all .2s ease;
     overflow: hidden
 }

 html.dark .dropdown-menu {
     background: #1E293B;
     border-color: #334155
 }

 .dropdown-menu.open {
     opacity: 1;
     visibility: visible;
     transform: translateY(0)
 }

 .dropdown-item {
     display: flex;
     align-items: center;
     gap: 8px;
     padding: 10px 14px;
     font-size: 14px;
     color: #475569;
     cursor: pointer
 }

 html.dark .dropdown-item {
     color: #CBD5E1
 }

 .dropdown-item:hover {
     background: #F8FAFC
 }

 html.dark .dropdown-item:hover {
     background: #334155
 }

 .modal-backdrop {
     position: fixed;
     inset: 0;
     background: rgba(0, 0, 0, .45);
     backdrop-filter: blur(4px);
     z-index: 2000;
     display: flex;
     align-items: center;
     justify-content: center;
     padding: 16px;
     opacity: 0;
     visibility: hidden;
     transition: opacity .2s, visibility .2s
 }

 .modal-backdrop.open {
     opacity: 1;
     visibility: visible
 }

 .modal-box {
     width: 100%;
     max-width: 500px;
     max-height: 92vh;
     overflow-y: auto;
     background: #fff;
     border-radius: 20px;
     box-shadow: 0 24px 64px rgba(0, 0, 0, .15);
     transform: scale(.95) translateY(10px);
     transition: transform .25s cubic-bezier(.34, 1.56, .64, 1)
 }

 html.dark .modal-box {
     background: #1E293B;
     border: 1px solid #334155
 }

 .modal-backdrop.open .modal-box {
     transform: scale(1) translateY(0)
 }

 .toast-container {
     position: fixed;
     bottom: 20px;
     right: 20px;
     z-index: 9999;
     display: flex;
     flex-direction: column;
     gap: 10px
 }

 @media(max-width:480px) {
     .toast-container {
         right: 12px;
         left: 12px
     }
 }

 .toast {
     display: flex;
     align-items: center;
     gap: 10px;
     padding: 12px 16px;
     background: #fff;
     border: 1px solid #E2E8F0;
     border-radius: 12px;
     box-shadow: 0 8px 24px rgba(0, 0, 0, .1);
     font-size: 14px;
     font-weight: 500;
     max-width: 360px;
     animation: toastIn .3s ease
 }

 html.dark .toast {
     background: #1E293B;
     border-color: #334155
 }

 @keyframes toastIn {
     from {
         opacity: 0;
         transform: translateX(40px)
     }

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

 .filter-tag {
     display: inline-flex;
     align-items: center;
     gap: 4px;
     padding: 6px 14px;
     border-radius: 99px;
     font-size: 13px;
     font-weight: 500;
     cursor: pointer;
     border: 1px solid #E2E8F0;
     background: #fff;
     color: #64748B;
     transition: all .15s;
     white-space: nowrap
 }

 html.dark .filter-tag {
     background: #1E293B;
     border-color: #334155;
     color: #94A3B8
 }

 .filter-tag:hover {
     border-color: #2563EB;
     color: #2563EB
 }

 .filter-tag.active {
     background: #EFF6FF;
     border-color: #2563EB;
     color: #2563EB;
     font-weight: 600
 }

 html.dark .filter-tag.active {
     background: rgba(37, 99, 235, .15);
     border-color: #3B82F6;
     color: #60A5FA
 }

 /* Notification Item */
 .notif-item {
     display: flex;
     gap: 14px;
     padding: 16px 20px;
     border-bottom: 1px solid #F1F5F9;
     transition: background .15s;
     cursor: pointer;
     position: relative
 }

 html.dark .notif-item {
     border-bottom-color: #1E293B
 }

 .notif-item:hover {
     background: #F8FAFC
 }

 html.dark .notif-item:hover {
     background: rgba(30, 41, 59, .5)
 }

 .notif-item.unread {
     background: #FAFBFF
 }

 html.dark .notif-item.unread {
     background: rgba(37, 99, 235, .04)
 }

 .notif-item.unread::before {
     content: '';
     position: absolute;
     left: 8px;
     top: 50%;
     transform: translateY(-50%);
     width: 6px;
     height: 6px;
     border-radius: 50%;
     background: #2563EB
 }

 .notif-icon-box {
     width: 40px;
     height: 40px;
     border-radius: 12px;
     display: flex;
     align-items: center;
     justify-content: center;
     flex-shrink: 0
 }

 /* Notification Settings Toggle */
 .toggle-track {
     width: 44px;
     height: 24px;
     border-radius: 99px;
     background: #CBD5E1;
     cursor: pointer;
     position: relative;
     transition: background .2s;
     flex-shrink: 0
 }

 html.dark .toggle-track {
     background: #475569
 }

 .toggle-track.on {
     background: #2563EB
 }

 .toggle-knob {
     width: 20px;
     height: 20px;
     border-radius: 50%;
     background: #fff;
     position: absolute;
     top: 2px;
     left: 2px;
     transition: transform .2s;
     box-shadow: 0 1px 3px rgba(0, 0, 0, .15)
 }

 .toggle-track.on .toggle-knob {
     transform: translateX(20px)
 }

 /* Priority tags */
 .priority-high {
     background: #FEE2E2;
     color: #991B1B;
     border: 1px solid #FECACA
 }

 html.dark .priority-high {
     background: rgba(239, 68, 68, .1);
     color: #F87171;
     border-color: rgba(239, 68, 68, .2)
 }

 .priority-medium {
     background: #FEF3C7;
     color: #92400E;
     border: 1px solid #FDE68A
 }

 html.dark .priority-medium {
     background: rgba(245, 158, 11, .1);
     color: #FCD34D;
     border-color: rgba(245, 158, 11, .2)
 }

 .priority-low {
     background: #ECFDF5;
     color: #065F46;
     border: 1px solid #A7F3D0
 }

 html.dark .priority-low {
     background: rgba(16, 185, 129, .1);
     color: #34D399;
     border-color: rgba(16, 185, 129, .2)
 }

 @media(max-width:639px) {
     .hide-mobile {
         display: none !important
     }
 }

 @media(max-width:767px) {
     .hide-tablet {
         display: none !important
     }
 }