:root{--bg-primary:#fff;--bg-secondary:#f3f4f6;--text-primary:#111827;--text-secondary:#4b5563;--accent-color:#3b82f6;--accent-hover:#2563eb;--border-color:#e5e7eb;--success:#10b981;--error:#ef4444;--warning:#f59e0b;--font-family:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}@media (prefers-color-scheme:dark){:root{--bg-primary:#0f172a;--bg-secondary:#1e293b;--text-primary:#f8fafc;--text-secondary:#94a3b8;--accent-color:#3b82f6;--accent-hover:#60a5fa;--border-color:#334155}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5;transition:background-color .3s,color .3s}a{color:var(--accent-color);text-decoration:none;transition:color .2s}a:hover{color:var(--accent-hover)}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.btn{cursor:pointer;border:none;border-radius:.375rem;outline:none;justify-content:center;align-items:center;padding:.5rem 1rem;font-weight:500;transition:all .2s;display:inline-flex}.btn-primary{background-color:var(--accent-color);color:#fff}.btn-primary:hover{background-color:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}.card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:.75rem;padding:1.5rem;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 6px -1px #0000000d}.card:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d}.input{border:1px solid var(--border-color);background-color:var(--bg-primary);width:100%;color:var(--text-primary);border-radius:.5rem;outline:none;padding:.75rem 1rem;font-size:1rem;transition:border-color .2s,box-shadow .2s}.input:focus{border-color:var(--accent-color);box-shadow:0 0 0 3px #3b82f633}.stats-grid{grid-template-columns:repeat(4,1fr);gap:1rem;padding:1.5rem;display:grid}.stats-grid-item{border-left:1px solid var(--border-color);text-align:center;padding-left:1rem}.stats-grid-item:first-child{border-left:none;padding-left:0}@media (width<=768px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:1.5rem 1rem}.stats-grid-item:nth-child(3){border-left:none;padding-left:0}}@media (width<=480px){.stats-grid{grid-template-columns:1fr;gap:1rem}.stats-grid-item{border-left:none;border-bottom:1px solid var(--border-color);padding-bottom:1rem;padding-left:0}.stats-grid-item:last-child{border-bottom:none;padding-bottom:0}}.header-container{grid-template-columns:1fr auto 1fr;align-items:center;max-width:1200px;margin:0 auto;display:grid}.header-logo-wrapper{justify-content:flex-start;display:flex}.header-logo{object-fit:contain;height:70px;display:block}.header-text-container{text-align:center}@media (width<=768px){.header-container{text-align:center;flex-direction:column;gap:.75rem;display:flex}.header-logo-wrapper{justify-content:center}.header-logo{height:60px}.header-spacer{display:none}}.staff-scanner-page{max-width:800px;min-height:80vh;margin:0 auto;padding:24px}.staff-login-container{text-align:center;background:#fff;border-radius:16px;max-width:400px;margin:100px auto;padding:32px;box-shadow:0 10px 30px #0000000d}.staff-login-container h2{color:#1e293b;margin-bottom:24px}.login-form{flex-direction:column;gap:16px;display:flex}.form-group{text-align:left}.form-group label{color:#475569;margin-bottom:8px;font-weight:500;display:block}.form-group input{border:1px solid #cbd5e1;border-radius:8px;width:100%;padding:12px;font-size:16px}.form-group input:focus{border-color:#3b82f6;outline:none;box-shadow:0 0 0 3px #3b82f61a}.scanner-header{text-align:center;margin-bottom:24px}.scanner-header h2{color:#1e293b;margin-bottom:8px}.scanner-header p{color:#64748b}.logout-btn{color:#ef4444;cursor:pointer;background:0 0;border:none;margin-top:10px;font-weight:500;text-decoration:underline}.scanner-body{background:#fff;border-radius:16px;margin-bottom:24px;padding:16px;box-shadow:0 10px 30px #0000000d}#reader{border:none!important}#reader button{color:#fff;cursor:pointer;background:#3b82f6;border:none;border-radius:8px;margin:4px;padding:10px 20px;font-weight:500}.qr-student-card{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffffe6;border:1px solid #fffc;border-radius:24px;animation:.6s cubic-bezier(.2,.8,.2,1) cardEntrance;position:relative;overflow:hidden;box-shadow:0 20px 40px #0000001a,inset 0 1px #fff9,0 0 20px #3b82f633}@keyframes cardEntrance{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.qr-student-card:before{content:"";pointer-events:none;z-index:10;background:linear-gradient(90deg,#fff0 0%,#fffc 50%,#fff0 100%);width:50%;height:100%;animation:3s infinite shimmer;position:absolute;top:0;left:-100%;transform:skew(-25deg)}@keyframes shimmer{0%{left:-100%}20%{left:200%}to{left:200%}}.qr-student-card.locked{background:#fef2f2f2;border-color:#ef4444;box-shadow:0 20px 40px #ef444433,inset 0 0 0 2px #ef4444}.qr-student-card.locked:before{background:linear-gradient(90deg,#ef444400 0%,#ef44444d 50%,#ef444400 100%)}.card-header{z-index:2;background:linear-gradient(90deg,#f8fafc 0%,#f1f5f9 100%);border-bottom:1px solid #0000000d;justify-content:space-between;align-items:center;padding:16px 24px;display:flex;position:relative}.card-header h3{text-transform:uppercase;letter-spacing:1px;color:#64748b;margin:0;font-size:16px;font-weight:700}.status-badge{border-radius:20px;align-items:center;gap:6px;padding:6px 14px;font-size:13px;font-weight:700;display:flex;box-shadow:0 2px 10px #0000000d}.status-badge.valid{color:#fff;background:linear-gradient(135deg,#10b981 0%,#059669 100%)}.status-badge.locked{color:#fff;background:linear-gradient(135deg,#ef4444 0%,#dc2626 100%);animation:2s infinite pulse-red}@keyframes pulse-red{0%{box-shadow:0 0 #ef444466}70%{box-shadow:0 0 0 10px #ef444400}to{box-shadow:0 0 #ef444400}}.card-body{z-index:2;gap:24px;padding:24px;display:flex;position:relative}@media (width<=640px){.card-body{text-align:center;flex-direction:column;align-items:center}}.student-avatar-wrap{border:4px solid #fff;border-radius:16px;flex-shrink:0;width:140px;height:180px;position:relative;overflow:hidden;box-shadow:0 10px 25px #0000001a}.student-avatar-wrap:after{content:"";pointer-events:none;border:1px solid #0000000d;border-radius:12px;position:absolute;inset:0}.student-avatar{object-fit:cover;width:100%;height:100%}.info-grid{text-align:left;grid-template-columns:1fr;gap:12px;margin-top:16px;display:grid}.info-item{color:#475569;background:#f8fafc99;border-radius:10px;align-items:center;gap:12px;padding:8px 12px;font-size:15px;transition:all .2s;display:flex}.info-item:hover{background:#fff;transform:translate(4px);box-shadow:0 4px 12px #0000000d}.info-icon{color:#3b82f6;flex-shrink:0}.card-footer{z-index:2;background:#f8fafccc;border-top:1px solid #0000000d;justify-content:flex-end;gap:16px;padding:20px 24px;display:flex;position:relative}.card-footer .btn{text-transform:uppercase;letter-spacing:.5px;border-radius:12px;padding:12px 24px;font-size:14px;font-weight:600}.card-footer .btn-primary{background:linear-gradient(135deg,#10b981 0%,#059669 100%);box-shadow:0 4px 15px #10b9814d}.card-footer .btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #10b98166}