:root{--blue:#2563eb;--blue-dark:#1d4ed8;--blue-soft:#eff6ff;--green:#16a34a;--red:#dc2626;--yellow:#d97706;--text:#172033;--muted:#667085;--line:#dbe4f0;--bg:#f5f7fb;--card:#fff;--shadow:0 16px 40px #2563eb17;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input,select{font:inherit}button{cursor:pointer}a{color:inherit}#root{min-height:100vh}.app-shell{grid-template-columns:270px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--line);background:#fff;flex-direction:column;gap:28px;height:100vh;padding:24px;display:flex;position:sticky;top:0}.brand{align-items:center;gap:12px;display:flex}.brand-mark{background:var(--blue);color:#fff;border-radius:8px;place-items:center;width:44px;height:44px;font-size:22px;font-weight:800;display:grid}.brand strong,.brand span{display:block}.brand span{color:var(--muted);font-size:14px}.side-nav{gap:8px;display:grid}.side-nav a{color:var(--muted);border:1px solid #0000;border-radius:8px;padding:14px 16px;font-weight:700;text-decoration:none;transition:all .2s}.side-nav a:hover,.side-nav a.active{color:var(--blue);background:var(--blue-soft);border-color:#bfdbfe}.sidebar-logout{margin-top:auto}.main-panel{min-width:0;padding:28px}.topbar{justify-content:space-between;align-items:center;gap:20px;min-height:82px;margin-bottom:24px;display:flex}.topbar h1{letter-spacing:0;margin:0;font-size:34px;line-height:1.1}.topbar p{color:var(--muted);margin:8px 0 0}.topbar-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.grid{gap:18px;display:grid}.stats-grid{grid-template-columns:repeat(4,minmax(160px,1fr))}.analytics-grid{grid-template-columns:minmax(0,1.3fr) minmax(320px,.7fr);align-items:start}.teachers-grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}.card{background:var(--card);box-shadow:var(--shadow);border:1px solid #e7edf7;border-radius:8px;padding:20px}.stat-card{gap:8px;display:grid}.stat-card span,.section-label{color:var(--muted);font-size:14px;font-weight:700}.stat-card strong{font-size:34px;line-height:1}.stat-card small{color:var(--muted)}.section-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.section-head h2{margin:0;font-size:22px}.btn{border:1px solid #0000;border-radius:8px;min-height:44px;padding:10px 16px;font-weight:800;transition:all .2s}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark);transform:translateY(-1px)}.btn-secondary{background:var(--blue-soft);color:var(--blue);border-color:#bfdbfe}.btn-secondary:hover{border-color:var(--blue)}.btn-danger{color:var(--red);background:#fef2f2;border-color:#fecaca}.btn-ghost{color:var(--muted);border-color:var(--line);background:#fff}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.field{text-align:left;gap:7px;display:grid}.field label,.field>span{color:var(--muted);font-size:14px;font-weight:800}.field input,.field select,.search-input,.date-input{border:1px solid var(--line);width:100%;min-height:44px;color:var(--text);background:#fff;border-radius:8px;outline:none;padding:10px 12px;transition:all .2s}.field input:focus,.field select:focus,.search-input:focus,.date-input:focus{border-color:var(--blue);box-shadow:0 0 0 4px #2563eb1f}.teacher-card{gap:16px;display:grid}.teacher-top{align-items:center;gap:12px;display:flex}.avatar{color:#fff;background:var(--blue);border-radius:8px;place-items:center;width:52px;height:52px;font-weight:900;display:grid}.teacher-top h3{margin:0;font-size:18px}.teacher-top p,.teacher-meta{color:var(--muted);margin:4px 0 0;font-size:14px}.qr-box{background:#f8fbff;border:1px dashed #bfdbfe;border-radius:8px;place-items:center;padding:12px;display:grid}.card-actions,.toolbar{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.toolbar{justify-content:space-between;margin-bottom:18px}.filters{flex-wrap:wrap;gap:10px;display:flex}.table-wrap{border:1px solid #e7edf7;border-radius:8px;width:100%;overflow:auto}.data-table{border-collapse:collapse;width:100%;min-width:760px}.data-table th{color:var(--muted);text-align:left;background:#f8fbff;font-size:13px}.data-table th,.data-table td{border-bottom:1px solid #e7edf7;padding:14px}.data-table tr:last-child td{border-bottom:0}.badge{border-radius:999px;justify-content:center;align-items:center;min-width:72px;padding:6px 10px;font-size:12px;font-weight:900;display:inline-flex}.badge-in{color:var(--green);background:#dcfce7}.badge-out{color:var(--red);background:#fee2e2}.badge-absent{color:#475569;background:#e2e8f0}.badge-late{color:var(--yellow);background:#fef3c7}.calendar-grid{grid-template-columns:repeat(7,minmax(0,1fr));gap:8px;display:grid}.calendar-day{border:1px solid var(--line);text-align:left;background:#fff;border-radius:8px;min-height:64px;padding:8px;transition:all .2s}.calendar-day:hover,.calendar-day.active{border-color:var(--blue);background:var(--blue-soft)}.calendar-day strong,.calendar-day span{display:block}.calendar-day span{color:var(--muted);font-size:12px}.scanner-page{background:radial-gradient(circle at 0 0,#dbeafe,#f8fbff 40%,#eef2f7);place-items:center;min-height:100vh;padding:24px;display:grid}.scanner-card{grid-template-columns:minmax(280px,560px) minmax(240px,1fr);align-items:center;gap:24px;width:min(960px,100%);display:grid}.scanner-view{aspect-ratio:4/3;background:#0f172a;border:4px solid #bfdbfe;border-radius:8px;width:100%;position:relative;overflow:hidden}.scanner-view video{object-fit:contain!important;width:100%!important;height:100%!important}.scanner-frame{border:4px solid var(--blue);pointer-events:none;border-radius:8px;position:absolute;inset:13%;box-shadow:0 0 0 999px #0f172a2e}.scanner-frame:after{content:"";background:var(--blue);height:3px;animation:2s ease-in-out infinite scan-line;position:absolute;top:12%;left:10%;right:10%;box-shadow:0 0 18px #2563ebbf}.scanner-frame.success{border-color:var(--green)}.scanner-frame.error{border-color:var(--red)}@keyframes scan-line{0%,to{transform:translateY(0)}50%{transform:translateY(190px)}}.toast{color:#fff;max-width:360px;box-shadow:var(--shadow);z-index:50;border-radius:8px;align-items:center;gap:14px;padding:14px 16px;display:flex;position:fixed;bottom:24px;right:24px}.toast-success{background:var(--green)}.toast-error{background:var(--red)}.toast-info{background:var(--blue)}.toast button,.icon-button{color:inherit;background:0 0;border:0;font-weight:900}.modal-backdrop{z-index:40;background:#0f172a8c;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.modal{background:#fff;border-radius:8px;width:min(560px,100%);padding:22px;box-shadow:0 24px 70px #0f172a47}.modal-head{justify-content:space-between;align-items:center;margin-bottom:18px;display:flex}.modal-head h2{margin:0}.empty-state,.loading-state{text-align:center;min-height:160px;color:var(--muted);border:1px dashed var(--line);border-radius:8px;place-items:center;padding:24px;display:grid}.empty-state strong{color:var(--text)}.login-page{background:linear-gradient(135deg,#eff6ff,#fff);place-items:center;min-height:100vh;padding:24px;display:grid}.login-card{width:min(420px,100%)}.login-card form{gap:14px;display:grid}.photo-thumb{object-fit:cover;border:1px solid var(--line);border-radius:8px;width:54px;height:54px}@media (width<=980px){.app-shell{grid-template-columns:1fr}.sidebar{height:auto;padding:16px;position:static}.side-nav{grid-template-columns:repeat(4,minmax(0,1fr))}.side-nav a{text-align:center;padding:12px 8px}.sidebar-logout{margin-top:0}.main-panel{padding:18px}.stats-grid,.analytics-grid,.scanner-card{grid-template-columns:1fr}}@media (width<=640px){.topbar,.toolbar,.section-head{flex-direction:column;align-items:stretch}.topbar h1{font-size:28px}.form-grid{grid-template-columns:1fr}.side-nav{grid-template-columns:repeat(2,minmax(0,1fr))}.stats-grid{grid-template-columns:1fr}}