*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}:root{--font: "Inter", system-ui, sans-serif;--color-primary: #22c55e;--color-primary-hover: #16a34a;--color-primary-bg: rgba(34,197,94,.1);--color-primary-light: rgba(34,197,94,.15);--bg-page: #070d09;--bg-card: #0d1610;--bg-sidebar: #090f0b;--text-primary: #e4ede5;--text-secondary: #7a9a7e;--text-muted: #4a6450;--border: #1a2b1e;--border-subtle: #111a14;--radius-sm: 6px;--radius: 8px;--radius-md: 10px;--radius-lg: 12px;--shadow-sm: 0 1px 2px rgba(0,0,0,.4)}body{font-family:var(--font);font-size:14px;line-height:1.5;color:var(--text-primary);background:var(--bg-page);-webkit-font-smoothing:antialiased}.app-shell{display:flex;height:100vh;overflow:hidden}.sidebar{width:220px;flex-shrink:0;background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-logo{padding:20px 20px 16px;border-bottom:1px solid var(--border)}.sidebar-logo-name{font-size:15px;font-weight:600;color:var(--text-primary);letter-spacing:-.01em}.sidebar-logo-sub{font-size:11px;color:var(--text-muted);margin-top:1px}.sidebar-nav{flex:1;overflow-y:auto;padding:12px 0}.sidebar-section-label{font-size:11px;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;padding:8px 20px 4px}.sidebar-link{display:flex;align-items:center;gap:10px;padding:8px 20px;color:var(--text-secondary);text-decoration:none;font-size:13.5px;font-weight:400;border-left:3px solid transparent;transition:background .1s,color .1s;cursor:pointer}.sidebar-link:hover{background:var(--bg-page);color:var(--text-primary)}.sidebar-link.active{background:var(--color-primary-bg);color:var(--color-primary);border-left-color:var(--color-primary);font-weight:500}.sidebar-link svg{flex-shrink:0;opacity:.6}.sidebar-link.active svg{opacity:1}.sidebar-footer{padding:16px 20px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:10px}.sidebar-user{display:flex;align-items:center;gap:10px}.sidebar-avatar{width:30px;height:30px;border-radius:50%;background:var(--color-primary-light);color:var(--color-primary);font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0}.sidebar-user-info{flex:1;min-width:0}.sidebar-user-name{font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user-role{font-size:11px;color:var(--text-muted);text-transform:capitalize}.main{flex:1;display:flex;flex-direction:column;overflow:hidden}.topbar{height:56px;background:var(--bg-card);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 32px;flex-shrink:0}.topbar-title{font-size:16px;font-weight:600;color:var(--text-primary)}.topbar-right{display:flex;align-items:center;gap:12px}.topbar-user{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary)}.topbar-avatar{width:28px;height:28px;border-radius:50%;background:var(--color-primary-light);color:var(--color-primary);font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:center}.content{flex:1;overflow-y:auto;padding:32px}.page-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:24px;gap:16px}.page-header-left h1{font-size:22px;font-weight:600;color:var(--text-primary);line-height:1.2}.page-header-left p{font-size:13px;color:var(--text-secondary);margin-top:4px}.page-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}.card-title{font-size:13px;font-weight:600;color:var(--text-primary);margin-bottom:16px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;position:relative}.stat-label{font-size:12px;color:var(--text-secondary);font-weight:500;text-transform:uppercase;letter-spacing:.04em}.stat-value{font-size:28px;font-weight:600;color:var(--text-primary);margin-top:6px;letter-spacing:-.02em}.stat-icon{position:absolute;top:20px;right:20px;width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center}.stat-icon.green{background:#22c55e26;color:#4ade80}.stat-icon.blue{background:#3b82f626;color:#60a5fa}.stat-icon.amber{background:#f59e0b26;color:#fbbf24}.stat-icon.purple{background:#8b5cf626;color:#a78bfa}.table-wrap{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.table-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border);gap:12px}.table-header-title{font-size:14px;font-weight:600;color:var(--text-primary)}.table-controls{display:flex;align-items:center;gap:8px}table{width:100%;border-collapse:collapse}thead th{padding:10px 16px;text-align:left;font-size:11px;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;background:var(--bg-page);border-bottom:1px solid var(--border);white-space:nowrap}tbody td{padding:13px 16px;border-bottom:1px solid var(--border-subtle);font-size:13.5px;color:var(--text-primary);vertical-align:middle}tbody tr:last-child td{border-bottom:none}tbody tr:hover td{background:#ffffff08}.td-muted{color:var(--text-secondary)}.badge{display:inline-flex;align-items:center;padding:3px 9px;border-radius:100px;font-size:11.5px;font-weight:500;white-space:nowrap;line-height:1;height:20px}.badge-green{background:#22c55e24;color:#4ade80}.badge-red{background:#ef444424;color:#f87171}.badge-amber{background:#f59e0b24;color:#fbbf24}.badge-blue{background:#3b82f624;color:#60a5fa}.badge-gray{background:#ffffff12;color:var(--text-secondary)}.badge-purple{background:#8b5cf624;color:#a78bfa}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:7px 14px;border-radius:var(--radius);font-size:13.5px;font-weight:500;font-family:var(--font);cursor:pointer;border:none;transition:background .12s,color .12s,border-color .12s;white-space:nowrap;line-height:1;height:34px}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff;border:1px solid var(--color-primary)}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover);border-color:var(--color-primary-hover)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-page)}.btn-danger{background:var(--bg-card);color:#dc2626;border:1px solid #fecaca}.btn-danger:hover:not(:disabled){background:#fff1f2}.btn-destructive{background:#dc2626;color:#fff;border:1px solid #dc2626}.btn-destructive:hover:not(:disabled){background:#b91c1c}.btn-sm{height:28px;padding:4px 10px;font-size:12px}.btn-icon{width:34px;height:34px;padding:0;border-radius:var(--radius)}.btn-loading{display:inline-block;width:14px;height:14px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.form-group{display:flex;flex-direction:column;gap:6px}.form-label{font-size:13px;font-weight:500;color:var(--text-secondary)}.form-label-required:after{content:" *";color:#dc2626}.form-input,.form-select{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:13.5px;font-family:var(--font);color:var(--text-primary);background:var(--bg-card);outline:none;transition:border-color .15s;height:36px}.form-input:focus,.form-select:focus{border-color:var(--color-primary)}.form-input::placeholder{color:var(--text-muted)}.form-error{font-size:12px;color:#dc2626}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.drawer-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;z-index:200;animation:fade-in .15s ease}.drawer{position:fixed;right:0;top:0;bottom:0;width:480px;background:var(--bg-card);z-index:201;display:flex;flex-direction:column;box-shadow:-4px 0 40px #00000080;animation:slide-in .2s ease;border-left:1px solid var(--border)}@keyframes slide-in{0%{transform:translate(100%)}to{transform:translate(0)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.drawer-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border);flex-shrink:0}.drawer-title{font-size:16px;font-weight:600;color:var(--text-primary)}.drawer-close{width:28px;height:28px;border-radius:var(--radius-sm);background:transparent;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:18px;transition:background .1s}.drawer-close:hover{background:var(--bg-page);color:var(--text-primary)}.drawer-body{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:20px}.drawer-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px;flex-shrink:0}.skeleton{background:linear-gradient(90deg,var(--border-subtle) 25%,rgba(255,255,255,.06) 50%,var(--border-subtle) 75%);background-size:200% 100%;animation:shimmer 1.4s infinite;border-radius:var(--radius-sm)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-row{display:flex;align-items:center;gap:12px;padding:13px 16px;border-bottom:1px solid var(--border-subtle)}.skeleton-cell{height:14px;border-radius:4px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:64px 32px;gap:12px}.empty-state-icon{color:var(--text-muted);margin-bottom:4px}.empty-state-title{font-size:15px;font-weight:500;color:var(--text-secondary)}.empty-state-sub{font-size:13.5px;color:var(--text-muted);max-width:280px}.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;flex-shrink:0}.status-dot.live{background:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light);animation:pulse-dot 2s infinite}.status-dot.offline{background:#94a3b8}@keyframes pulse-dot{0%,to{box-shadow:0 0 0 3px var(--color-primary-light)}50%{box-shadow:0 0 0 5px var(--color-primary-light)}}.feed-list{list-style:none;display:flex;flex-direction:column;gap:0;max-height:420px;overflow-y:auto}.feed-item{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border-subtle)}.feed-item:last-child{border-bottom:none}.feed-item-name{font-size:13.5px;font-weight:500;color:var(--text-primary)}.feed-item-meta{font-size:12px;color:var(--text-secondary);margin-top:1px}.feed-item-time{font-size:12px;color:var(--text-muted);margin-left:auto;white-space:nowrap}.enrollment-banner{display:flex;align-items:center;gap:16px;background:#fefce8;border:1px solid #fde68a;border-radius:var(--radius-lg);padding:16px 20px;margin-bottom:24px}.enrollment-pulse{width:12px;height:12px;border-radius:50%;background:#d97706;flex-shrink:0;animation:pulse-amber 1.2s ease-in-out infinite}@keyframes pulse-amber{0%,to{box-shadow:0 0 #d9770666}50%{box-shadow:0 0 0 8px #d9770600}}.enrollment-text{flex:1;font-size:13.5px;color:#92400e}.enrollment-text strong{font-weight:600}.search-input-wrap{position:relative;flex:1;max-width:280px}.search-input-wrap svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none}.search-input{width:100%;padding:7px 12px 7px 32px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;font-family:var(--font);color:var(--text-primary);background:var(--bg-card);outline:none;transition:border-color .15s;height:34px}.search-input:focus{border-color:var(--color-primary)}.search-input::placeholder{color:var(--text-muted)}.divider{height:1px;background:var(--border);margin:4px 0}.login-page{display:flex;height:100vh}.login-left{flex:1;background:linear-gradient(160deg,#040a05,#061209,#051009);display:flex;flex-direction:column;justify-content:center;padding:60px}.login-brand{font-size:24px;font-weight:600;color:#fff;letter-spacing:-.02em}.login-tagline{font-size:14px;color:#94a3b8;margin-top:8px;line-height:1.6;max-width:320px}.login-decoration{margin-top:48px;display:flex;flex-direction:column;gap:12px}.login-decoration-item{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-muted)}.login-decoration-icon{width:32px;height:32px;border-radius:8px;background:#22c55e1a;display:flex;align-items:center;justify-content:center;color:var(--color-primary);flex-shrink:0}.login-right{width:480px;flex-shrink:0;background:#07100a;display:flex;align-items:center;justify-content:center;padding:48px 40px;border-left:1px solid var(--border)}.login-form-card{width:100%;max-width:360px;background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:32px;display:flex;flex-direction:column;gap:20px}.login-form-title{font-size:20px;font-weight:600;color:var(--text-primary)}.login-form-sub{font-size:13px;color:var(--text-secondary);margin-top:4px}.login-form-fields{display:flex;flex-direction:column;gap:16px}.login-error{background:#ef44441a;border:1px solid rgba(239,68,68,.25);border-radius:var(--radius);padding:10px 14px;font-size:13px;color:#f87171}.period-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin-bottom:20px;display:flex;align-items:center;justify-content:space-between;gap:16px}.period-info-primary{font-size:20px;font-weight:600;color:var(--text-primary)}.period-info-secondary{font-size:13px;color:var(--text-secondary);margin-top:4px}.period-timer{text-align:right}.period-timer-value{font-size:22px;font-weight:600;color:var(--color-primary);font-variant-numeric:tabular-nums}.period-timer-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.student-row{display:flex;align-items:center;gap:14px;padding:14px 20px;border-bottom:1px solid var(--border-subtle);cursor:pointer;transition:background .1s}.student-row:last-child{border-bottom:none}.student-row:hover{background:#ffffff08}.student-initials{width:34px;height:34px;border-radius:50%;background:var(--bg-page);border:1px solid var(--border);color:var(--text-secondary);font-size:12px;font-weight:500;display:flex;align-items:center;justify-content:center;flex-shrink:0}.student-info{flex:1;min-width:0}.student-name{font-size:14px;font-weight:500;color:var(--text-primary)}.student-id-label{font-size:12px;color:var(--text-muted);margin-top:1px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}@media(max-width:900px){.two-col{grid-template-columns:1fr}}.structure-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:start}@media(max-width:900px){.structure-grid{grid-template-columns:1fr}}.structure-panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.structure-panel-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--bg-page);border-bottom:1px solid var(--border)}.structure-panel-title{font-size:13px;font-weight:600;color:var(--text-primary)}.structure-item{display:flex;align-items:center;justify-content:space-between;padding:11px 16px;border-bottom:1px solid var(--border-subtle);font-size:13.5px;gap:8px}.structure-item:last-child{border-bottom:none}.structure-item-name{font-size:13.5px;color:var(--text-primary)}.entity-cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}.entity-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px 18px 14px;cursor:pointer;transition:border-color .15s,box-shadow .15s;display:flex;flex-direction:column;gap:10px;position:relative}.entity-card:hover{border-color:var(--color-primary);box-shadow:0 4px 20px #22c55e1f}.entity-card-title{font-size:15px;font-weight:600;color:var(--text-primary);flex:1;min-width:0;word-break:break-word}.entity-card-meta{font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:6px;flex-wrap:wrap}.entity-card-arrow{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);opacity:0;transition:opacity .15s}.entity-card:hover .entity-card-arrow{opacity:1}.entity-card .card-delete-btn{opacity:0;transition:opacity .15s}.entity-card:hover .card-delete-btn{opacity:1}.breadcrumb{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-muted);margin-bottom:4px}.breadcrumb-sep{color:var(--border)}.breadcrumb-link{color:var(--color-primary);cursor:pointer;font-weight:500}.breadcrumb-link:hover{text-decoration:underline}.flex{display:flex}.flex-col{display:flex;flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-20{gap:20px}.gap-24{gap:24px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.w-full{width:100%}.text-muted{color:var(--text-muted);font-size:13px}.text-sm{font-size:12.5px}.select-none{-webkit-user-select:none;user-select:none}.loading-screen{display:flex;align-items:center;justify-content:center;height:100vh;background:var(--bg-page);font-size:13.5px;color:var(--text-muted)}.form-note{font-size:12.5px;color:var(--text-muted);background:var(--bg-page);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:10px 14px;line-height:1.5}.enroll-waiting{display:flex;flex-direction:column;align-items:center;text-align:center;padding:20px 0;gap:28px}.enroll-scanner-wrap{position:relative;width:140px;height:140px;display:flex;align-items:center;justify-content:center}.enroll-scanner-pad{width:88px;height:88px;border-radius:50%;background:#fefce8;border:2px solid #fde68a;display:flex;align-items:center;justify-content:center;color:#d97706;position:relative;z-index:1}.enroll-wait-ring{position:absolute;border-radius:50%;border:1.5px solid rgba(217,119,6,.3);animation:enroll-ring-out 2s ease-out infinite;pointer-events:none}.enroll-wait-ring-1{width:100px;height:100px;animation-delay:0s}.enroll-wait-ring-2{width:118px;height:118px;animation-delay:.55s}.enroll-wait-ring-3{width:136px;height:136px;animation-delay:1.1s}@keyframes enroll-ring-out{0%{transform:scale(.85);opacity:1}to{transform:scale(1.1);opacity:0}}.enroll-student-info{display:flex;flex-direction:column;gap:4px}.enroll-student-name{font-size:20px;font-weight:600;color:var(--text-primary);letter-spacing:-.01em}.enroll-student-id{font-size:12px;font-family:monospace;color:var(--text-muted);letter-spacing:.06em;background:var(--bg-page);padding:2px 10px;border-radius:100px;display:inline-block;border:1px solid var(--border)}.enroll-student-class{font-size:13px;color:var(--text-secondary);margin-top:4px}.enroll-instruction{font-size:13.5px;color:var(--text-secondary);line-height:1.65;max-width:340px}