:root{--primary:#2c3e50;--primary-dark:#1a252f;--secondary:#34495e;--success:#27ae60;--danger:#e74c3c;--warning:#f39c12;--info:#3498db;--light:#ecf0f1;--dark:#2c3e50}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;overflow-x:hidden;background:#f8f9fa;margin:0;padding:0}html{overflow-x:hidden}.app-spinner{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(255,255,255,.9);display:flex;align-items:center;justify-content:center;z-index:9999}.app-spinner .spinner-border{width:3rem;height:3rem}.login-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);padding:1rem}.login-card{background:#fff;padding:3rem 2.5rem;border-radius:1rem;box-shadow:0 10px 40px rgba(0,0,0,.2);max-width:420px;width:100%}@media (max-width:576px){.login-card{padding:2rem 1.5rem;max-width:100%;margin:0 1rem}.login-card h1{font-size:1.5rem}.brand-logo{width:60px;height:60px;font-size:2rem}}.brand-logo{width:80px;height:80px;border-radius:50%;background:0 0;display:flex;align-items:center;justify-content:center;margin:0 auto 1.5rem;color:var(--primary);font-size:2.5rem}.brand-logo:has(i){background:linear-gradient(135deg,var(--primary),var(--info));color:#fff}.brand-logo img{width:100%;height:100%;object-fit:cover;border-radius:50%}.login-card h1{text-align:center;color:var(--primary);font-size:1.75rem;font-weight:600;margin-bottom:2rem}.login-card .form-label{font-weight:500;color:#555}.login-card .form-control{padding:.75rem 1rem;border-radius:.5rem;border:1px solid #ddd}.login-card .form-control:focus{border-color:var(--primary);box-shadow:0 0 0 .2rem rgba(44,62,80,.15)}.login-card .btn-primary{padding:.75rem;font-weight:500;border-radius:.5rem}.app-shell{min-height:100vh;background:#f8f9fa}.app-wrapper{display:flex;min-height:100vh}.app-main{flex:1;min-width:0;background:#f8f9fa;padding:30px;overflow-y:auto;height:100vh}.topbar{height:60px;background:#fff;border-bottom:1px solid #e0e0e0;position:sticky;top:0;z-index:1000}.logo-mini{width:36px;height:36px;border-radius:8px;background:0 0;display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:1.25rem}.logo-mini:has(i){background:linear-gradient(135deg,var(--primary),var(--info));color:#fff}.logo-mini img{width:100%;height:100%;object-fit:cover;border-radius:6px}.sidebar{width:280px;flex-shrink:0;position:sticky;top:0;height:100vh;overflow-y:auto;overflow-x:hidden;background:linear-gradient(180deg,var(--primary) 0,var(--primary-dark) 100%)}.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-track{background:rgba(255,255,255,.05)}.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.2);border-radius:3px}.sidebar::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.3)}.sidebar-inner{display:flex;flex-direction:column;min-height:100%;width:100%;color:#fff}.sidebar .brand{padding:2rem 1.5rem;border-bottom:1px solid rgba(255,255,255,.1);flex-shrink:0}.sidebar .logo{width:60px;height:60px;border-radius:12px;background:0 0;display:flex;align-items:center;justify-content:center;font-size:2rem;flex-shrink:0}.sidebar .logo:has(i){background:rgba(255,255,255,.15)}.sidebar .logo img{width:100%;height:100%;object-fit:cover;border-radius:8px}#logoOffcanvas{width:60px;height:60px;border-radius:12px;background:0 0;display:flex;align-items:center;justify-content:center;font-size:2rem;flex-shrink:0}#logoOffcanvas:has(i){background:rgba(255,255,255,.15)}#logoOffcanvas img{width:100%;height:100%;object-fit:cover;border-radius:8px}.sidebar .platform-name{font-size:1.5rem;font-weight:700;color:#fff}.sidebar .school-name{font-size:.75rem;font-weight:400;color:rgba(255,255,255,.6);margin-top:.25rem}.nav-section{padding:1rem;flex:1;overflow-y:auto}.nav-section .nav-link{color:rgba(255,255,255,.8);padding:.875rem 1.25rem;border-radius:.75rem;margin-bottom:.5rem;display:flex;align-items:center;gap:.75rem;transition:.2s;text-decoration:none}.nav-section .nav-link i{font-size:1.25rem;width:24px;text-align:center}.nav-section .nav-link:hover{background:rgba(255,255,255,.1);color:#fff}.nav-section .nav-link.active{background:rgba(255,255,255,.2);color:#fff;font-weight:500}.sidebar-bottom{padding:1rem;border-top:1px solid rgba(255,255,255,.1)}.user-row{display:flex;align-items:center;gap:.75rem;padding:.75rem;margin-bottom:.75rem;background:rgba(255,255,255,.1);border-radius:.75rem}.user-avatar{width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-weight:600;color:#fff;flex-shrink:0}.btn-logout{width:100%;background:rgba(231,76,60,.9);color:#fff;border:none;padding:.75rem;border-radius:.75rem;font-weight:500;transition:.2s}.btn-logout:hover{background:var(--danger);color:#fff}.app-content{background:#f8f9fa;min-height:100vh}#page-content{max-width:1400px}@media (max-width:991.98px){.app-wrapper{flex-direction:column}.app-main{padding:20px 15px;width:100%;height:auto;min-height:calc(100vh - 60px)}#sidebarOffcanvas{width:280px;border:none;background:linear-gradient(180deg,var(--primary) 0,var(--primary-dark) 100%)}#sidebarOffcanvas .sidebar-inner{min-height:100%;height:auto;overflow-y:auto}#sidebarOffcanvas .offcanvas-body{padding:0;overflow-y:auto}body.offcanvas-open{overflow:hidden}.offcanvas-backdrop{background-color:rgba(0,0,0,.5)}}@media (min-width:992px){.topbar{display:none}}.hover-shadow{transition:box-shadow .3s}.hover-shadow:hover{box-shadow:0 4px 12px rgba(0,0,0,.15)!important}.btn-primary{background-color:var(--primary);border-color:var(--primary)}.btn-primary:hover{background-color:var(--primary-dark);border-color:var(--primary-dark)}.text-primary{color:var(--primary)!important}.bg-primary{background-color:var(--primary)!important}.card{border:none;box-shadow:0 1px 3px rgba(0,0,0,.08)}.card-header{background:#fff;border-bottom:1px solid #e9ecef;font-weight:600}.table-hover tbody tr:hover{background-color:rgba(44,62,80,.03)}.avatar-sm{width:32px;height:32px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background-color:rgba(44,62,80,.1)!important;flex-shrink:0}.avatar-sm .text-primary{color:var(--primary)!important;font-weight:600}.bg-primary.bg-opacity-10{background-color:rgba(44,62,80,.1)!important}.bg-success.bg-opacity-10{background-color:rgba(39,174,96,.1)!important}.bg-warning.bg-opacity-10{background-color:rgba(243,156,18,.1)!important}.bg-danger.bg-opacity-10{background-color:rgba(231,76,60,.1)!important}.bg-info.bg-opacity-10{background-color:rgba(52,152,219,.1)!important}.bg-secondary.bg-opacity-10{background-color:rgba(52,73,94,.1)!important}.text-success{color:var(--success)!important}.text-warning{color:var(--warning)!important}.text-danger{color:var(--danger)!important}.text-info{color:var(--info)!important}.text-secondary{color:var(--secondary)!important}