:root{--bg:#f5f7fa;--surface:#fff;--surface-alt:#f5f7fa;--border:#e1e6eb;--text:#12202e;--text-h:#12202e;--text-muted:#5a6b7b;--accent:#dca50b;--accent-hover:#c4900a;--accent-bg:#dca50b1f;--teal:#22404c;--teal-hover:#1a323c;--teal-bg:#22404c1a;--danger:#dc2626;--danger-bg:#dc262614;--shadow:#12202e14 0 1px 2px, #12202e14 0 8px 24px;--sans:"Inter", system-ui, "Segoe UI", Roboto, sans-serif;font:15px/1.5 var(--sans);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#0f1b26;--surface:#152634;--surface-alt:#1c3040;--border:#233240;--text:#eaf0f5;--text-h:#eaf0f5;--text-muted:#9fb0bf;--accent:#f0b92a;--accent-hover:#f6cc58;--accent-bg:#f0b92a29;--teal:#3e6672;--teal-hover:#4f7986;--teal-bg:#3e66724d;--danger:#f87171;--danger-bg:#f871711f;--shadow:#00000059 0 1px 2px, #00000059 0 8px 24px}}*{box-sizing:border-box}body{margin:0}#root{min-height:100svh}h1,h2,h3{color:var(--text-h);margin:0;font-weight:600}p{margin:0}button{font:inherit;cursor:pointer}input{font:inherit}.auth-loading{background:var(--bg);justify-content:center;align-items:center;height:100svh;display:flex}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:32px;height:32px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.login-page{background:var(--bg);justify-content:center;align-items:center;min-height:100svh;padding:24px;display:flex}.login-card{background:var(--surface);border:1px solid var(--border);width:100%;max-width:380px;box-shadow:var(--shadow);border-radius:16px;padding:40px 32px}.login-logo{width:120px;height:auto;margin:0 auto 20px;display:block}.login-card h1{text-align:center;font-size:22px}.login-subtitle{text-align:center;color:var(--text-muted);margin-top:4px;margin-bottom:28px;font-size:14px}.login-form{flex-direction:column;gap:6px;display:flex}.login-form label{color:var(--text-h);margin-top:12px;font-size:13px;font-weight:500}.login-form input{border:1px solid var(--border);background:var(--surface-alt);color:var(--text-h);border-radius:8px;outline:none;padding:10px 12px;transition:border-color .15s}.login-form input:focus{border-color:var(--accent)}.login-password-row{justify-content:space-between;align-items:baseline;margin-top:12px;display:flex}.login-password-row label{margin-top:0}.login-forgot-link{color:var(--accent);background:0 0;padding:0;font-size:12.5px;font-weight:500}.login-forgot-link:hover{background:0 0;text-decoration:underline}.login-error{color:var(--danger);background:var(--danger-bg);border-radius:8px;margin-top:12px;padding:8px 10px;font-size:13px}.config-error-list{flex-direction:column;gap:6px;margin:12px 0;padding:0;list-style:none;display:flex}.config-error-list code{background:var(--danger-bg);color:var(--danger);border-radius:6px;padding:4px 8px;font-size:12px;display:inline-block}.login-form button{background:var(--accent);color:#fff;border:none;border-radius:8px;margin-top:20px;padding:10px 12px;font-weight:600;transition:background .15s}.login-form button:hover:not(:disabled){background:var(--accent-hover)}.login-form button:disabled{opacity:.7;cursor:default}.login-divider{color:var(--text-muted);align-items:center;gap:12px;margin:22px 0;font-size:12px;display:flex}.login-divider:before,.login-divider:after{content:"";background:var(--border);flex:1;height:1px}.google-button{border:1px solid var(--border);background:var(--surface-alt);width:100%;color:var(--text-h);border-radius:8px;padding:10px 12px;font-weight:500;transition:background .15s}.google-button:hover:not(:disabled){background:var(--border)}.google-button:disabled{opacity:.7;cursor:default}.dashboard-shell{min-height:100svh;display:flex}.sidebar{background:var(--surface);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:240px;padding:20px 16px;display:flex}.sidebar-brand{align-items:center;gap:10px;padding:4px 8px 24px;display:flex}.sidebar-brand-mark{object-fit:cover;border-radius:8px;flex-shrink:0;width:32px;height:32px}.sidebar-brand-text{color:var(--text-h);font-size:14px;font-weight:600}.sidebar-nav{flex-direction:column;flex:1;gap:2px;display:flex}.sidebar-link{color:var(--text);border-radius:8px;padding:9px 12px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s,color .15s}.sidebar-link:hover{background:var(--surface-alt);color:var(--text-h)}.sidebar-link-active{background:var(--accent-bg);color:var(--accent)}.sidebar-footer{border-top:1px solid var(--border);flex-direction:column;gap:10px;padding-top:16px;display:flex}.sidebar-user-email{color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;padding:0 8px;font-size:12px;display:block;overflow:hidden}.sign-out-button{border:1px solid var(--border);background:var(--surface-alt);color:var(--text-h);border-radius:8px;padding:8px 12px;font-size:13px;font-weight:500;transition:background .15s}.sign-out-button:hover{background:var(--border)}.dashboard-content{flex:1;min-width:0;padding:32px 40px}.page h1{margin-bottom:8px;font-size:24px}.page-placeholder{color:var(--text-muted)}button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:9px 14px;font-size:13px;font-weight:600;transition:background .15s}button:hover:not(:disabled){background:var(--accent-hover)}button:disabled{opacity:.6;cursor:default}.button-secondary{background:var(--surface-alt);color:var(--text-h);border:1px solid var(--border)}.button-secondary:hover:not(:disabled){background:var(--border)}.page-header{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:24px;display:flex}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:28px;display:grid}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:4px;padding:18px 20px;display:flex}.stat-card-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;font-size:12px;font-weight:600}.stat-card-value{color:var(--text-h);font-size:28px;font-weight:700}.stat-card-hint{color:var(--text-muted);font-size:12px}.overview-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));align-items:start;gap:20px;display:grid}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.card h2{margin-bottom:14px;font-size:15px}.section-subheading{color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin:18px 0 10px;font-size:12px;font-weight:600}.session-list{flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;display:flex}.session-row{border-radius:8px;justify-content:space-between;align-items:center;gap:12px;padding:10px 8px;display:flex}.session-row:hover{background:var(--surface-alt)}.session-row-main{flex-direction:column;gap:2px;min-width:0;display:flex}.session-row-title{color:var(--text-h);font-size:13px;font-weight:600}.session-row-meta{color:var(--text-muted);font-size:12px}.session-row-actions{flex-shrink:0;align-items:center;gap:8px;display:flex}.session-row-actions .button-secondary{padding:5px 10px;font-size:12px}.badge{white-space:nowrap;border-radius:999px;padding:3px 8px;font-size:11px;font-weight:600}.badge-active{background:var(--accent-bg);color:var(--accent)}.badge-today{background:var(--teal-bg);color:var(--teal)}.activity-list{flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.activity-row{border-radius:8px;align-items:center;gap:10px;padding:9px 8px;display:flex}.activity-row:hover{background:var(--surface-alt)}.status-dot{border-radius:50%;flex-shrink:0;width:8px;height:8px}.status-present{background:#22c55e}.status-absent{background:var(--danger)}.status-late{background:var(--accent)}.activity-row-main{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.activity-row-title{color:var(--text-h);text-transform:capitalize;font-size:13px;font-weight:600}.activity-row-status{color:var(--text-muted);font-weight:400}.activity-row-meta{color:var(--text-muted);text-transform:none;font-size:12px}.activity-row-time{color:var(--text-muted);white-space:nowrap;flex-shrink:0;font-size:12px}.modal-overlay{z-index:50;background:#0a0b1080;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.modal{background:var(--surface);border:1px solid var(--border);width:100%;max-width:440px;box-shadow:var(--shadow);border-radius:16px;padding:28px}.modal h2{font-size:18px}.modal-subtitle{color:var(--text-muted);margin-top:6px;margin-bottom:18px;font-size:13px}.modal-class-list{flex-direction:column;gap:6px;max-height:260px;display:flex;overflow-y:auto}.modal-class-option{border:1px solid var(--border);cursor:pointer;border-radius:8px;align-items:center;gap:10px;padding:10px;font-size:13px;display:flex}.modal-class-option:hover{background:var(--surface-alt)}.modal-class-option-disabled{opacity:.6;cursor:default}.modal-actions{justify-content:flex-end;gap:10px;margin-top:22px;display:flex}.tabs{border-bottom:1px solid var(--border);gap:4px;margin-bottom:20px;display:flex}.tab{color:var(--text-muted);background:0 0;border:none;border-bottom:2px solid #0000;border-radius:0;margin-bottom:-1px;padding:8px 14px;font-size:13px;font-weight:600}.tab:hover:not(:disabled){color:var(--text-h);background:0 0}.tab-active{color:var(--accent);border-bottom-color:var(--accent)}.badge-muted{background:var(--surface-alt);color:var(--text-muted)}.table-wrap{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow-x:auto}.table{border-collapse:collapse;width:100%;font-size:13px}.table th{text-align:left;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);border-bottom:1px solid var(--border);white-space:nowrap;padding:12px 16px;font-size:11px;font-weight:600}.table td{border-bottom:1px solid var(--border);color:var(--text);white-space:nowrap;padding:12px 16px}.table tbody tr:last-child td{border-bottom:none}.table tbody tr:hover{background:var(--surface-alt)}.table-muted{color:var(--text-muted)}.search-input{border:1px solid var(--border);background:var(--surface);width:100%;max-width:360px;color:var(--text-h);border-radius:8px;outline:none;margin-bottom:18px;padding:9px 12px;transition:border-color .15s}.search-input:focus{border-color:var(--accent)}.filters-row{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px;display:flex}.filters-row .search-input{margin-bottom:0}.filter-input{border:1px solid var(--border);background:var(--surface);color:var(--text-h);border-radius:8px;outline:none;padding:9px 12px;transition:border-color .15s}.filter-input:focus{border-color:var(--accent)}.archive-toggle{color:var(--text-muted);white-space:nowrap;align-items:center;gap:6px;font-size:13px;display:inline-flex}.table-link{color:var(--accent);font-size:13px;font-weight:600;text-decoration:none}.table-link:hover{text-decoration:underline}button.table-link{cursor:pointer;background:0 0;border:none;padding:0;font-family:inherit}.back-link{margin-bottom:16px;display:inline-block}.override-group{gap:4px;display:inline-flex}.override-button{text-transform:capitalize;background:var(--surface-alt);color:var(--text-muted);border:1px solid var(--border);padding:4px 9px;font-size:11px;font-weight:600}.override-button:hover:not(:disabled){background:var(--border)}.override-button-active{background:var(--accent);color:#fff;border-color:var(--accent)}.row-error{color:var(--danger);margin-top:4px;font-size:11px;display:block}.attendance-pill{border-radius:999px;padding:3px 9px;font-size:12px;font-weight:600;display:inline-flex}.attendance-good{color:#16a34a;background:#22c55e1f}.attendance-ok{background:var(--accent-bg);color:var(--accent-hover)}.attendance-low{background:var(--danger-bg);color:var(--danger)}.chart-wrap{margin-top:4px}.settings-profile{align-items:center;gap:16px;display:flex}.avatar{background:var(--accent-bg);width:48px;height:48px;color:var(--accent);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:15px;font-weight:700;display:flex}.settings-profile-name{color:var(--text-h);font-size:15px;font-weight:600}.settings-profile-email{color:var(--text-muted);font-size:13px}.page>.card+.card{margin-top:20px}.settings-field-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;display:grid}.settings-field{color:var(--text-h);flex-direction:column;gap:6px;font-size:13px;font-weight:500;display:flex}.settings-field input,.settings-field select{border:1px solid var(--border);background:var(--surface-alt);color:var(--text);border-radius:8px;padding:9px 12px}.settings-field input:disabled{cursor:not-allowed}.modal-field-spaced{margin-top:14px}.settings-hint{margin-top:12px;font-size:12px}.settings-toggle-row{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:16px;padding:12px 0;display:flex}.settings-toggle-row:last-child{border-bottom:none}.settings-toggle-label{color:var(--text-h);font-size:13px;font-weight:600}.settings-toggle-hint{color:var(--text-muted);margin-top:2px;font-size:12px}.toggle{background:var(--border);border-radius:999px;flex-shrink:0;align-items:center;width:40px;height:24px;padding:3px;display:flex}.toggle-thumb{background:#fff;border-radius:50%;width:18px;height:18px;transition:transform .15s}.toggle-on{background:var(--accent)}.toggle-on .toggle-thumb{transform:translate(16px)}@media (width<=720px){.dashboard-shell{flex-direction:column}.sidebar{flex-direction:row;align-items:center;gap:16px;width:100%;padding:12px 16px;overflow-x:auto}.sidebar-brand{padding:0}.sidebar-nav{flex-direction:row}.sidebar-footer{border-top:none;flex-direction:row;margin-left:auto;padding-top:0}.sidebar-user-email{display:none}.dashboard-content{padding:24px}}