:root{--primary:#2563eb;--primary-hover:#1d4ed8;--bg-color:#0f172a;--card-bg:#1e293bb3;--text-primary:#f8fafc;--text-secondary:#94a3b8;--success:#22c55e;--error:#ef4444;--warning:#eab308;--nav-height:65px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5}#root{flex-direction:column;min-height:100vh;display:flex}.main-content{padding-bottom:var(--nav-height);flex:1}.glass-panel{background:var(--card-bg);-webkit-backdrop-filter:blur(12px);border:1px solid #ffffff1a;border-radius:16px;box-shadow:0 4px 30px #0000001a}.btn-primary{background-color:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:12px 24px;font-size:1rem;font-weight:600;transition:all .2s}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover);transform:translateY(-1px)}.btn-primary:disabled{opacity:.7;cursor:not-allowed}.page-container{max-width:600px;margin:0 auto;padding:20px;animation:.3s ease-out fadeIn}.page-header{text-align:center;margin-bottom:24px}.page-header h2{background:linear-gradient(135deg,#fff,#94a3b8);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.5rem;font-weight:700}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.modal-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background:var(--card-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid #ffffff1a;border-radius:12px;width:90%;max-width:500px;max-height:90vh;padding:24px;overflow-y:auto}.form-group{margin-bottom:15px}.form-group label{color:var(--text-secondary);margin-bottom:5px;display:block}.form-control{color:#fff;background:#0003;border:1px solid #fff3;border-radius:8px;width:100%;padding:10px}.modal-actions{justify-content:flex-end;gap:10px;margin-top:20px;display:flex}.btn-secondary{color:var(--text-secondary);border:1px solid var(--text-secondary);cursor:pointer;background-color:#0000;border-radius:8px;padding:10px 20px}.btn-danger{background-color:var(--error);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:8px 16px}.btn-edit{background-color:var(--warning);color:#000;cursor:pointer;border:none;border-radius:8px;padding:8px 16px}.table-responsive{overflow-x:auto}.data-table{border-collapse:collapse;width:100%;margin-top:20px}.data-table th,.data-table td{text-align:left;border-bottom:1px solid #ffffff1a;padding:12px}.data-table th{color:var(--text-secondary);font-weight:600}.bottom-nav{height:var(--nav-height);-webkit-backdrop-filter:blur(16px);z-index:1000;padding-bottom:env(safe-area-inset-bottom);background:#0f172ad9;border-top:1px solid #ffffff1a;justify-content:space-around;align-items:center;display:flex;position:fixed;bottom:0;left:0;right:0}.nav-item{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:8px;text-decoration:none;transition:all .2s;display:flex}.nav-item span{margin-top:4px;font-size:.75rem;font-weight:500}.nav-item.active{color:var(--primary)}.nav-item.active svg{transform:scale(1.1)}.login-container{background:radial-gradient(circle at 100% 0,#1e293b,#0f172a);justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login-card{width:100%;max-width:400px;padding:32px 24px}.title{text-align:center;margin-bottom:8px;font-size:1.75rem;font-weight:800}.subtitle{color:var(--text-secondary);text-align:center;margin-bottom:32px;font-size:.95rem}.input-group{margin-bottom:20px}.input-group label{color:var(--text-secondary);margin-bottom:8px;font-size:.9rem;display:block}.input-group input{color:#fff;background:#0003;border:1px solid #ffffff1a;border-radius:8px;outline:none;width:100%;padding:12px 16px;font-size:1rem;transition:border-color .2s}.input-group input:focus{border-color:var(--primary);background:#0000004d}.error-message{color:var(--error);text-align:center;background:#ef44441a;border:1px solid #ef444433;border-radius:8px;margin-bottom:20px;padding:12px;font-size:.9rem}.scanner-wrapper{background:#000;border-radius:16px;width:100%;position:relative;overflow:hidden;box-shadow:0 10px 30px #0000004d}.qr-reader-container{width:100%;min-height:300px}.qr-reader-container video{border-radius:16px}.scan-feedback{z-index:10;justify-content:center;align-items:center;animation:.3s cubic-bezier(.175,.885,.32,1.275) popIn;display:flex;position:absolute;inset:0}.scan-feedback.success{background:#22c55ee6}.scan-feedback.error{background:#ef4444e6}.feedback-content{text-align:center;color:#fff;padding:24px}.feedback-content svg{margin-bottom:16px}.feedback-content h3{margin-bottom:8px;font-size:1.5rem}.feedback-content p{opacity:.9;font-size:1.1rem}@keyframes popIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}#qr-reader{border:none!important}#qr-reader__dashboard_section_csr span,#qr-reader__dashboard_section_swaplink{color:var(--text-secondary)!important;text-decoration:none!important}#qr-reader__dashboard_section_csr button{cursor:pointer;background:var(--primary)!important;color:#fff!important;border:none!important;border-radius:6px!important;margin-top:10px!important;padding:8px 16px!important}.dashboard{padding-bottom:80px}.metrics-grid{grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:32px;display:grid}.metric-card{background:var(--card-bg);border:1px solid #ffffff0d;border-radius:16px;align-items:center;gap:16px;padding:16px;display:flex}.metric-icon{border-radius:12px;justify-content:center;align-items:center;width:48px;height:48px;display:flex}.metric-icon.blue{color:#60a5fa;background:#2563eb26}.metric-icon.green{color:#4ade80;background:#22c55e26}.metric-icon.yellow{color:#facc15;background:#eab30826}.metric-icon.red{color:#f87171;background:#ef444426}.metric-info{flex-direction:column;display:flex}.metric-value{margin-bottom:4px;font-size:1.5rem;font-weight:700;line-height:1}.metric-label{color:var(--text-secondary);font-size:.8rem}.recent-activity h3{color:var(--text-secondary);margin-bottom:16px;font-size:1.1rem}.history-list{flex-direction:column;gap:12px;display:flex}.history-item{background:var(--card-bg);border:1px solid #ffffff0d;border-radius:12px;justify-content:space-between;align-items:center;padding:16px;display:flex}.student-info{flex-direction:column;display:flex}.student-info .name{font-size:1rem;font-weight:600}.student-info .grade{color:var(--text-secondary);margin-top:2px;font-size:.8rem}.scan-details{flex-direction:column;align-items:flex-end;gap:6px;display:flex}.status-badge{text-transform:uppercase;letter-spacing:.5px;border-radius:20px;padding:4px 8px;font-size:.7rem;font-weight:700}.status-badge.presente{color:#4ade80;background:#22c55e33}.status-badge.temprano{color:#60a5fa;background:#2563eb33}.status-badge.tarde{color:#facc15;background:#eab30833}.status-badge.falto{color:#f87171;background:#ef444433}.time{color:var(--text-secondary);font-size:.85rem}.empty-state{text-align:center;color:var(--text-secondary);padding:32px 0;font-style:italic}.p-4{padding:16px}.mb-4{margin-bottom:16px}.mt-2{margin-top:8px}.flex{display:flex}.gap-2{gap:8px}.flex-1{flex:1}.input-elegant{color:#fff;background:#0003;border:1px solid #ffffff1a;border-radius:8px;outline:none;padding:12px 16px;font-size:1rem;transition:border-color .2s}.input-elegant:focus{border-color:var(--primary);background:#0000004d}.instances-list{flex-direction:column;gap:16px;display:flex}.instance-card{background:var(--card-bg);border:1px solid #ffffff0d;border-radius:12px;padding:16px;transition:all .2s}.instance-card.is-active{border-color:#22c55e80;box-shadow:0 0 15px #22c55e1a}.instance-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.instance-info{align-items:center;gap:12px;display:flex}.instance-info h4{margin:0;font-size:1.1rem}.text-success{color:#4ade80}.text-warning{color:#facc15}.active-badge{color:#4ade80;background:#22c55e1a;border-radius:8px;align-items:center;gap:4px;padding:4px 8px;font-size:.8rem;font-weight:600;display:flex}.instance-actions{flex-wrap:wrap;gap:8px;display:flex}.btn-action{cursor:pointer;color:#fff;border:none;border-radius:8px;align-items:center;gap:6px;padding:8px 12px;font-size:.85rem;font-weight:600;display:flex}.btn-action:disabled{opacity:.6;cursor:not-allowed}.btn-action.blue{background:#2563ebcc}.btn-action.green{background:#22c55ecc}.btn-action.red{background:#ef4444cc}.qr-modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:2000;background:#000c;justify-content:center;align-items:center;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.qr-modal-content{text-align:center;width:90%;max-width:400px;padding:32px 24px;position:relative}.close-btn{color:#fff;cursor:pointer;background:0 0;border:none;position:absolute;top:16px;right:16px}.qr-image-container{background:#fff;border-radius:12px;justify-content:center;margin:20px 0;padding:16px;display:flex}.qr-image-container img{width:100%;max-width:250px}.loading-text{color:var(--text-secondary);justify-content:center;align-items:center;gap:8px;display:flex}.spin-icon{animation:2s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}