@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";
:root{--color-bg:#f8fafc;--color-surface:#fff;--color-surface-2:#f1f5f9;--color-border:#e2e8f0;--color-border-subtle:#f1f5f9;--color-text-primary:#0f172a;--color-text-secondary:#475569;--color-text-muted:#94a3b8;--color-accent:#5fcf80;--color-accent-hover:#4ebd6f;--color-accent-subtle:#5fcf801f;--color-success:#10b981;--color-success-subtle:#10b9811f;--color-warning:#f59e0b;--color-warning-subtle:#f59e0b1f;--color-danger:#ef4444;--color-danger-subtle:#ef44441f;--color-info:#0ea5e9;--color-info-subtle:#0ea5e91f;--color-neutral:#64748b;--color-neutral-subtle:#64748b1f;--sidebar-width:240px;--topbar-height:60px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-full:9999px;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--transition-fast:.12s ease;--transition-base:.2s ease}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{color:var(--color-text-primary);background-color:var(--color-bg);-webkit-font-smoothing:antialiased;font-family:Inter,system-ui,sans-serif;font-size:14px;line-height:1.5}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}input,select,textarea{font-family:inherit;font-size:inherit}.dashboard-shell{height:100vh;display:flex;position:relative;overflow:hidden}.sidebar{z-index:100;background:#0f172a;border-right:1px solid #ffffff0d;flex-direction:column;flex-shrink:0;width:72px;height:100%;transition:width .22s cubic-bezier(.4,0,.2,1),box-shadow .22s;display:flex;position:absolute;top:0;bottom:0;left:0;overflow:hidden!important}.sidebar:hover{width:var(--sidebar-width);box-shadow:4px 0 24px #0f172a40}.sidebar nav,.nav-list{scrollbar-width:thin;scrollbar-color:#fff3 transparent}.sidebar ::-webkit-scrollbar{width:4px;height:0}.nav-list::-webkit-scrollbar{width:4px;height:0}.sidebar ::-webkit-scrollbar-track{background:0 0}.nav-list::-webkit-scrollbar-track{background:0 0}.sidebar ::-webkit-scrollbar-thumb{background:#fff3;border-radius:4px}.nav-list::-webkit-scrollbar-thumb{background:#fff3;border-radius:4px}.sidebar ::-webkit-scrollbar-thumb:hover{background:#fff6}.nav-list::-webkit-scrollbar-thumb:hover{background:#fff6}.sidebar:not(:hover) ::-webkit-scrollbar{width:0!important;display:none!important}.sidebar:not(:hover) .nav-list::-webkit-scrollbar{width:0!important;display:none!important}.sidebar:not(:hover),.sidebar:not(:hover) .nav-list{scrollbar-width:none!important}.main-content{flex-direction:column;flex:1;margin-left:72px;transition:margin-left .22s cubic-bezier(.4,0,.2,1);display:flex;overflow:hidden}.mobile-topbar{background:var(--color-surface);border-bottom:1px solid var(--color-border);height:56px;padding:0 var(--space-4);align-items:center;gap:var(--space-3);z-index:80;flex-shrink:0;display:none;position:sticky;top:0}@media (max-width:768px){.mobile-topbar{display:flex}}.mobile-hamburger-btn{color:var(--color-text-primary);padding:var(--space-2);margin-left:calc(-1 * var(--space-2));border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;display:flex}.mobile-hamburger-btn:hover{background:var(--color-surface-2)}.sidebar-close-btn{color:var(--color-text-secondary);padding:var(--space-2);border-radius:var(--radius-sm);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;display:none}.sidebar-close-btn:hover{background:var(--color-surface-2);color:var(--color-text-primary)}.sidebar-user-details{opacity:0;transition:opacity .18s cubic-bezier(.4,0,.2,1)}.sidebar:hover .sidebar-user-details{opacity:1}@media (max-width:768px){.sidebar-user-details{opacity:1!important}}.page-content{padding:var(--space-6);flex:1;overflow-y:auto}.sidebar-backdrop{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:90;background:#0f172a4d;display:none;position:fixed;inset:0}.sidebar-header{border-bottom:1px solid #ffffff0d;flex-shrink:0;justify-content:space-between;align-items:center;height:60px;padding:0 24px;display:flex}.sidebar-logo{color:#fff;letter-spacing:-.2px;white-space:nowrap;align-items:center;font-size:16px;font-weight:800;display:flex}.logo-mark{color:var(--color-accent);margin-right:var(--space-1);font-size:20px;font-weight:800}.logo-text{opacity:0;transition:opacity .15s ease-in-out}.logo-text span{color:var(--color-accent)}.sidebar:hover .logo-text{opacity:1}.nav-list{padding:var(--space-3) 0;gap:var(--space-1);flex-direction:column;list-style:none;display:flex}.nav-item a{padding:var(--space-3) 20px 24px 20px;color:#94a3b8;transition:background var(--transition-fast), color var(--transition-fast);white-space:nowrap;border-left:4px solid #0000;align-items:center;font-size:13.5px;font-weight:500;display:flex}.nav-item a:hover{color:#fff;background:#ffffff08}.nav-item a.active{color:var(--color-accent);border-left-color:var(--color-accent);background:#ffffff0a;font-weight:600}.sidebar-logout{border-left:4px solid #0000!important}.sidebar-logout:hover{color:#ef4444!important;background:#ef444414!important}.sidebar-logout:hover .nav-icon{color:#ef4444!important}.nav-icon-wrapper{justify-content:center;align-items:center;width:24px;margin-right:16px;display:inline-flex}.nav-icon{flex-shrink:0}.nav-label{opacity:0;pointer-events:none;transition:opacity .15s ease-in-out}.sidebar:hover .nav-label{opacity:1;pointer-events:auto}@media (max-width:768px){.sidebar{z-index:100;box-shadow:none;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%);width:var(--sidebar-width)!important}.sidebar-logo{padding:0}.sidebar-header{padding:0 var(--space-4)}.logo-text{opacity:1!important}.nav-label{opacity:1!important;pointer-events:auto!important}.sidebar-close-btn{display:flex}.main-content{margin-left:0!important}.topbar{padding:0 var(--space-4)}.topbar-toggle-btn{display:flex}.mobile-sidebar-open .sidebar{transform:translate(0);box-shadow:4px 0 20px #0f172a26}.mobile-sidebar-open .sidebar-backdrop{display:block}.topbar-user-info{display:none}.page-content{padding:var(--space-4)}.page-header{align-items:flex-start;gap:var(--space-3);flex-direction:column}.grid-cols-2{grid-template-columns:1fr}}.page-header{margin-bottom:var(--space-6);justify-content:space-between;align-items:center;display:flex}.page-title{color:var(--color-text-primary);letter-spacing:-.3px;font-size:20px;font-weight:700}.page-subtitle{color:var(--color-text-secondary);margin-top:var(--space-1);font-size:13px}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-5)}.card-sm{padding:var(--space-4)}.metric-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-5)}.metric-card-label{text-transform:uppercase;letter-spacing:.6px;color:var(--color-text-muted);margin-bottom:var(--space-2);font-size:12px;font-weight:600}.metric-card-value{color:var(--color-text-primary);font-size:32px;font-weight:700;line-height:1}.table-wrapper{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);-webkit-overflow-scrolling:touch;overflow-x:auto}.data-table{border-collapse:collapse;width:100%}.data-table th{padding:var(--space-3) var(--space-4);text-align:left;text-transform:uppercase;letter-spacing:.6px;color:var(--color-text-muted);border-bottom:1px solid var(--color-border);background:var(--color-surface-2);white-space:nowrap;font-size:11px;font-weight:600}.data-table td{padding:var(--space-3) var(--space-4);color:var(--color-text-primary);border-bottom:1px solid var(--color-border-subtle);font-size:13.5px}.data-table tbody tr:last-child td{border-bottom:none}.data-table tbody tr:hover td{background:var(--color-surface-2)}.badge{white-space:nowrap;border-radius:999px;align-items:center;padding:2px 8px;font-size:11.5px;font-weight:600;line-height:1.6;display:inline-flex}.badge-success{background:var(--color-success-subtle);color:var(--color-success)}.badge-warning{background:var(--color-warning-subtle);color:var(--color-warning)}.badge-danger{background:var(--color-danger-subtle);color:var(--color-danger)}.badge-info{background:var(--color-info-subtle);color:var(--color-info)}.badge-neutral{background:var(--color-neutral-subtle);color:var(--color-neutral)}.badge-default{background:var(--color-accent-subtle);color:var(--color-accent)}.btn{align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);transition:background var(--transition-fast), opacity var(--transition-fast);white-space:nowrap;border:none;font-size:13.5px;font-weight:600;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-accent-hover)}.btn-secondary{background:var(--color-surface-2);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background:var(--color-border)}.btn-danger{background:var(--color-danger-subtle);color:var(--color-danger)}.btn-danger:hover:not(:disabled){background:#ef444433}.btn-sm{padding:var(--space-1) var(--space-3);border-radius:var(--radius-md);font-size:12.5px}.form-group{gap:var(--space-2);flex-direction:column;display:flex}.form-label{color:var(--color-text-secondary);font-size:12.5px;font-weight:600}.form-required:after{content:" *";color:var(--color-danger)}.form-input,.form-select,.form-textarea{background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-2) var(--space-3);color:var(--color-text-primary);width:100%;transition:border-color var(--transition-fast);outline:none;font-size:13.5px}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--color-accent)}.form-input::placeholder,.form-textarea::placeholder{color:var(--color-text-muted)}.form-error{color:var(--color-danger);font-size:12px}.filter-bar{align-items:center;gap:var(--space-3);margin-bottom:var(--space-4);flex-wrap:wrap;display:flex}.filter-bar .form-input{min-width:200px;max-width:280px}.filter-bar .form-select{min-width:140px}.modal-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:50;padding:var(--space-4);background:#0009;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);width:100%;max-width:520px;max-height:90vh;box-shadow:var(--shadow-md);overflow-y:auto}.modal-header{padding:var(--space-5) var(--space-6);border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;display:flex}.modal-title{font-size:16px;font-weight:700}.modal-body{padding:var(--space-6);gap:var(--space-4);flex-direction:column;display:flex}.modal-footer{justify-content:flex-end;gap:var(--space-3);padding:var(--space-4) var(--space-6);border-top:1px solid var(--color-border);display:flex}.status-log{flex-direction:column;gap:0;display:flex}.status-log-item{align-items:flex-start;gap:var(--space-3);padding:var(--space-3) 0;border-bottom:1px solid var(--color-border-subtle);font-size:13px;display:flex}.status-log-item:last-child{border-bottom:none}.status-log-dot{background:var(--color-accent);border-radius:50%;flex-shrink:0;width:8px;height:8px;margin-top:5px}.status-log-meta{color:var(--color-text-muted);font-size:12px}.attention-feed{gap:var(--space-3);flex-direction:column;display:flex}.attention-item{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4) var(--space-5);align-items:center;gap:var(--space-4);transition:border-color var(--transition-fast);display:flex}.attention-item:hover{border-color:var(--color-accent)}.attention-item-icon{border-radius:var(--radius-sm);background:var(--color-warning-subtle);width:36px;height:36px;color:var(--color-warning);flex-shrink:0;justify-content:center;align-items:center;display:flex}.attention-item-body{flex:1;min-width:0}.attention-item-student{font-size:13.5px;font-weight:600}.attention-item-detail{color:var(--color-text-secondary);font-size:12.5px}.spinner{border:2px solid var(--color-border);border-top-color:var(--color-accent);border-radius:50%;width:20px;height:20px;animation:.7s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}@keyframes slideDown{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.empty-state{padding:var(--space-10);text-align:center;color:var(--color-text-muted);flex-direction:column;justify-content:center;align-items:center;display:flex}.empty-state-title{color:var(--color-text-secondary);margin-bottom:var(--space-2);font-size:15px;font-weight:600}.grid-cols-4{gap:var(--space-4);grid-template-columns:repeat(4,1fr);display:grid}.grid-cols-3{gap:var(--space-4);grid-template-columns:repeat(3,1fr);display:grid}.grid-cols-2{gap:var(--space-4);grid-template-columns:repeat(2,1fr);display:grid}@media (max-width:1024px){.grid-cols-4,.grid-cols-3{grid-template-columns:repeat(2,1fr)}}@media (max-width:640px){.grid-cols-4{grid-template-columns:repeat(2,1fr)}.grid-cols-3,.grid-cols-2{grid-template-columns:1fr}}.text-muted{color:var(--color-text-muted)}.text-sm{font-size:12.5px}.font-medium{font-weight:500}.font-semibold{font-weight:600}.mt-4{margin-top:var(--space-4)}.mt-6{margin-top:var(--space-6)}.flex{display:flex}.items-center{align-items:center}.gap-2{gap:var(--space-2)}.gap-3{gap:var(--space-3)}.gap-4{gap:var(--space-4)}.w-full{width:100%}.drawer-backdrop{-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);z-index:60;background:#00000073;animation:.18s fadeIn;position:fixed;inset:0}.drawer{background:var(--color-surface);border-left:1px solid var(--color-border);z-index:61;flex-direction:column;width:100%;max-width:540px;animation:.22s cubic-bezier(.16,1,.3,1) slideInRight;display:flex;position:fixed;top:0;bottom:0;right:0;overflow:hidden;box-shadow:-8px 0 32px #0000001f}.drawer-header{padding:var(--space-5) var(--space-6);border-bottom:1px solid var(--color-border);flex-shrink:0;justify-content:space-between;align-items:center;display:flex}.drawer-title{color:var(--color-text-primary);font-size:16px;font-weight:700}.drawer-close{border-radius:var(--radius-sm);background:var(--color-surface-2);border:1px solid var(--color-border);width:32px;height:32px;color:var(--color-text-secondary);transition:all var(--transition-fast);cursor:pointer;justify-content:center;align-items:center;font-size:16px;display:flex}.drawer-close:hover{background:var(--color-border);color:var(--color-text-primary)}.drawer-body{padding:var(--space-6);gap:var(--space-4);flex-direction:column;flex:1;display:flex;overflow-y:auto}@keyframes slideInRight{0%{transform:translate(100%)}to{transform:translate(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.pagination{padding:var(--space-3) var(--space-4);border-top:1px solid var(--color-border-subtle);background:var(--color-surface-2);border-radius:0 0 var(--radius-md) var(--radius-md);justify-content:space-between;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.pagination-info{color:var(--color-text-muted);font-size:12.5px}.pagination-controls{align-items:center;gap:var(--space-2);display:flex}.pagination-btn{border-radius:var(--radius-sm);border:1px solid var(--color-border);background:var(--color-surface);width:32px;height:32px;color:var(--color-text-secondary);cursor:pointer;transition:all var(--transition-fast);justify-content:center;align-items:center;font-size:13px;display:flex}.pagination-btn:hover:not(:disabled){background:var(--color-accent-subtle);border-color:var(--color-accent);color:var(--color-accent)}.pagination-btn:disabled{opacity:.4;cursor:not-allowed}.pagination-btn.active{background:var(--color-accent);border-color:var(--color-accent);color:#fff;font-weight:700}.page-size-select{height:32px;padding:0 var(--space-2);border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text-secondary);cursor:pointer;font-size:12.5px}.profile-tabs{border-bottom:2px solid var(--color-border-subtle);margin-bottom:var(--space-5);-webkit-overflow-scrolling:touch;gap:0;display:flex;overflow-x:auto}.profile-tab{padding:var(--space-3) var(--space-5);color:var(--color-text-muted);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;background:0 0;border:none;border-bottom:2.5px solid #0000;margin-bottom:-2px;font-size:13.5px;font-weight:600}.profile-tab:hover{color:var(--color-text-secondary)}.profile-tab.active{color:var(--color-accent);border-bottom-color:var(--color-accent)}.avatar{background:var(--color-accent-subtle);color:var(--color-accent);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:flex}.avatar-lg{width:56px;height:56px;font-size:20px}.avatar-md{width:40px;height:40px;font-size:15px}.card-interactive{transition:transform var(--transition-base), box-shadow var(--transition-base);cursor:pointer}.card-interactive:hover{transform:translateY(-2px);box-shadow:0 8px 24px #00000014}.btn:active:not(:disabled){transform:scale(.97)}.back-btn{align-items:center;gap:var(--space-2);color:var(--color-text-muted);padding:var(--space-1) 0;margin-bottom:var(--space-3);cursor:pointer;transition:color var(--transition-fast);background:0 0;border:none;font-size:13px;font-weight:500;text-decoration:none;display:inline-flex}.back-btn:hover{color:var(--color-accent)}.page-title-accent{display:inline-block;position:relative}.page-title-accent:before{content:"";background:var(--color-accent);border-radius:2px;width:4px;height:70%;position:absolute;top:50%;left:-14px;transform:translateY(-50%)}.empty-state-icon{margin-bottom:var(--space-3);opacity:.6;font-size:40px}.data-table tbody tr:nth-child(2n) td{background:#00000003}.data-table tbody tr:hover td{transition:background .1s;background:var(--color-accent-subtle)!important}@media (max-width:640px){.drawer{border-left:none;border-top:1px solid var(--color-border);border-radius:var(--radius-lg) var(--radius-lg) 0 0;max-width:100%;height:90vh;animation:.22s cubic-bezier(.16,1,.3,1) slideInUp;top:auto}@keyframes slideInUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.pagination{flex-direction:column;align-items:flex-start}.profile-hero-row{flex-direction:column;align-items:flex-start!important;gap:var(--space-4)!important}.profile-hero-actions{width:100%}.profile-hero-actions>div{gap:var(--space-2);flex-direction:column;width:100%;display:flex}.profile-hero-actions .btn{justify-content:center;width:100%}.profile-contact-row{flex-direction:column;gap:var(--space-3)!important}}@media (max-width:1024px){.profile-hero-row{gap:var(--space-4)!important;flex-direction:column!important;grid-template-columns:1fr!important;display:flex!important}.profile-hero-row>div:first-child{order:2!important}.profile-hero-row>div:last-child{order:1!important}.profile-hero-actions{width:100%;align-items:flex-start!important}.profile-hero-actions>div{align-items:flex-start!important}}@media (max-width:640px){.grid-cols-4 .card-interactive{padding:var(--space-3)!important;gap:var(--space-3)!important}.grid-cols-4 .card-interactive>div:first-child{border-radius:var(--radius-sm)!important;width:36px!important;height:36px!important}.grid-cols-4 .card-interactive>div:first-child svg{width:18px!important;height:18px!important}.grid-cols-4 .card-interactive>div:last-child>div:first-child{font-size:20px!important}.grid-cols-4 .card-interactive>div:last-child>div:last-child{font-size:11px!important}.grid-cols-4 .card-interactive>div:last-child{text-align:left!important;flex-direction:column!important;justify-content:center!important;align-items:flex-start!important;display:flex!important}}.tutor-students-header{justify-content:space-between;gap:var(--space-4);align-items:center;width:100%;display:flex}.tutor-students-stats-card{align-items:center;gap:var(--space-3);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);min-width:160px;padding:10px 16px;display:flex}.tutor-students-filters{gap:var(--space-3);flex:1;justify-content:flex-end;width:100%;max-width:500px;display:flex}@media (max-width:768px){.tutor-students-header{align-items:stretch;gap:var(--space-3);flex-direction:column}.tutor-students-stats-card{box-sizing:border-box;width:100%}.tutor-students-filters{justify-content:space-between;width:100%;max-width:100%}.tutor-students-filters select,.tutor-students-filters>div{flex:1!important}.desktop-calendar-container{display:none!important}.mobile-calendar-container{display:flex!important}}@media (min-width:769px){.desktop-calendar-container{display:flex!important}.mobile-calendar-container{display:none!important}}@keyframes toastFadeIn{0%{opacity:0;transform:translateY(12px)scale(.96)}to{opacity:1;transform:translateY(0)scale(1)}}.switch{width:44px;height:24px;display:inline-block;position:relative}.switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;background-color:var(--color-surface-3,#ccc);border:1px solid var(--color-border);border-radius:24px;transition:all .2s;position:absolute;inset:0}.slider:before{content:"";background-color:#fff;border-radius:50%;width:16px;height:16px;transition:all .2s;position:absolute;bottom:3px;left:3px;box-shadow:0 1px 3px #00000026}input:checked+.slider{background-color:var(--color-success);border-color:var(--color-success)}input:focus+.slider{box-shadow:0 0 1px var(--color-success)}input:checked+.slider:before{transform:translate(20px)}