:root{--primary:#1e3a8a;--primary-light:#2563eb;--secondary:#0d9488;--bg:#f8fafc;--card-bg:#fff;--text:#0f172a;--text-muted:#475569;--correct:#15803d;--correct-bg:#f0fdf4;--wrong:#b91c1c;--wrong-bg:#fef2f2;--border:#cbd5e1;--radius:14px;--warning:#d97706;--warning-bg:#fffbeb}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}html,body{-webkit-overflow-scrolling:touch;width:100%;height:auto;min-height:100%;overflow:hidden auto}body{background-color:var(--bg);color:var(--text);max-width:760px;margin:0 auto;padding:12px 12px 60px;line-height:1.6}header{color:#fff;border-radius:var(--radius);text-align:center;background:linear-gradient(135deg,#1e3a8a,#2563eb);margin-bottom:16px;padding:20px 16px;transition:background .4s;box-shadow:0 8px 16px #1e3a8a33}header.teal-theme{background:linear-gradient(135deg,#0f766e,#0d9488);box-shadow:0 8px 16px #0d948833}header h1{text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px;font-size:1.2rem;font-weight:800;line-height:1.4}header p{opacity:.9;font-size:.9rem;font-weight:500}.module-selector-card{border-radius:var(--radius);background:#fff;border:2px solid #bfdbfe;margin-bottom:16px;padding:16px;box-shadow:0 4px 12px #2563eb14}.module-selector-title{color:var(--primary);text-transform:uppercase;align-items:center;gap:8px;margin-bottom:10px;font-size:.9rem;font-weight:800;display:flex}.module-select{border:2px solid var(--primary-light);width:100%;color:var(--primary);cursor:pointer;appearance:none;background-color:#f8fafc;background-image:url(data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%232563eb%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E);background-position:right 12px top 50%;background-repeat:no-repeat;background-size:12px;border-radius:10px;outline:none;padding:14px 12px;font-size:.95rem;font-weight:700;box-shadow:0 2px 4px #0000000d}.controls-card{background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border);margin-bottom:16px;padding:16px;box-shadow:0 2px 8px #0000000a}.controls-card h2{color:var(--text);justify-content:space-between;align-items:center;margin-bottom:12px;font-size:.95rem;font-weight:700;display:flex}.toggle-group{flex-direction:column;gap:10px;margin-bottom:14px;display:flex}.toggle-item{background:#f1f5f9;border-radius:10px;justify-content:space-between;align-items:center;padding:8px 12px;font-size:.9rem;font-weight:500;display:flex}.switch{width:44px;height:24px;display:inline-block;position:relative}.switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;background-color:#cbd5e1;border-radius:24px;transition:all .3s;position:absolute;inset:0}.slider:before{content:"";background-color:#fff;border-radius:50%;width:18px;height:18px;transition:all .3s;position:absolute;bottom:3px;left:3px}input:checked+.slider{background-color:var(--primary-light)}input:checked+.slider:before{transform:translate(20px)}.btn-group-grid{grid-template-columns:1fr 1fr;gap:8px;margin-top:10px;display:grid}@media (width<=480px){.btn-group-grid{grid-template-columns:1fr}}.btn{cursor:pointer;text-align:center;border:none;border-radius:10px;justify-content:center;align-items:center;gap:6px;width:100%;padding:12px;font-size:.9rem;font-weight:700;transition:all .2s;display:inline-flex}.btn:active{transform:scale(.97)}.btn-primary{background-color:var(--primary);color:#fff;font-size:1rem;box-shadow:0 4px 10px #1e3a8a40}.btn-submit{background-color:var(--secondary);color:#fff;margin-top:20px;padding:14px;font-size:1.05rem;box-shadow:0 4px 10px #0d94884d}.btn-warning{background-color:var(--warning);color:#fff}.btn-outline{border:2px solid var(--border);color:var(--text);background-color:#0000}.btn-sm{border-width:1.5px;border-radius:8px;width:auto;padding:6px 10px;font-size:.8rem}.progress-bar-container{background-color:#e2e8f0;border-radius:8px;width:100%;height:8px;margin-bottom:12px;overflow:hidden}.progress-bar-fill{background-color:var(--primary-light);width:0%;height:100%;transition:width .3s}.question-card{background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border);margin-bottom:14px;padding:16px;box-shadow:0 2px 6px #00000008}.question-title{color:var(--text);margin-bottom:14px;font-size:.98rem;font-weight:700;line-height:1.5}.question-badge{color:var(--primary-light);vertical-align:middle;background:#dbeafe;border-radius:6px;margin-right:6px;padding:3px 8px;font-size:.75rem;font-weight:800;display:inline-block}.options-list{flex-direction:column;gap:8px;display:flex}.option-item{border:2px solid var(--border);cursor:pointer;background:#fff;border-radius:10px;align-items:flex-start;padding:10px 12px;font-size:.9rem;transition:all .2s;display:flex}.option-item 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var(--border);height:32px;color:var(--text-muted);cursor:pointer;background:#f8fafc;border-radius:6px;justify-content:center;align-items:center;font-size:.78rem;font-weight:700;display:flex}.q-grid-btn.answered{border-color:var(--primary-light);color:var(--primary);background:#dbeafe}.result-summary{border-radius:var(--radius);text-align:center;border:3px solid var(--primary-light);background:#fff;margin-bottom:20px;padding:20px 16px;box-shadow:0 8px 24px #2563eb26}.score-circle{width:100px;height:100px;color:var(--primary);border:4px solid var(--primary-light);background:#eff6ff;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;margin:12px auto;display:flex}.score-num{font-size:1.8rem;font-weight:900;line-height:1}.score-total{color:var(--text-muted);margin-top:4px;font-size:.8rem;font-weight:600}.score-rank{border-radius:20px;margin-top:8px;margin-bottom:14px;padding:4px 14px;font-size:.9rem;font-weight:700;display:inline-block}.rank-excellent{color:#15803d;background:#dcfce7}.rank-good{color:#0369a1;background:#e0f2fe}.rank-average{color:#b45309;background:#fef3c7}.rank-poor{color:#b91c1c;background:#fee2e2}.mode-banner{color:#92400e;background:#fffbebf5;border:2px solid #fde68a;border-radius:10px;justify-content:space-between;align-items:center;margin-bottom:14px;padding:10px 14px;font-size:.85rem;font-weight:700;display:flex}.table-container{border:1px solid var(--border);border-radius:10px;width:100%;margin-top:12px;overflow-x:auto}.result-table{border-collapse:collapse;text-align:left;width:100%;font-size:.85rem}.result-table th,.result-table td{border-bottom:1px solid var(--border);vertical-align:middle;padding:8px 10px}.result-table th{color:var(--text);white-space:nowrap;background:#f8fafc;font-weight:800}.status-badge{white-space:nowrap;border-radius:6px;padding:3px 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var(--border);gap:6px;margin-bottom:14px;display:flex}.tab-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-bottom:3px solid #0000;margin-bottom:-2px;padding:8px 12px;font-size:.85rem;font-weight:700}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:2000;background:#0f172a99;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal-card{background:#fff;border-radius:16px;width:100%;max-width:420px;padding:20px;box-shadow:0 20px 25px -5px #0003}.modal-title{color:var(--primary);margin-bottom:8px;font-size:1rem;font-weight:800}.modal-message{color:var(--text-muted);margin-bottom:16px;font-size:.9rem;line-height:1.5}.modal-actions{justify-content:flex-end;gap:8px;display:flex}.toast-banner{color:#fff;z-index:1000;background:#1e293b;border-radius:8px;padding:10px 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8px;font-size:.75rem;font-weight:700}.essay-line-row{margin-bottom:10px}.essay-line-top{justify-content:space-between;align-items:center;margin-bottom:4px;display:flex}.essay-line-label{color:var(--text-muted);text-transform:uppercase;font-size:.75rem;font-weight:800}.essay-hint-chip{color:#0e7490;background:#ecfeff;border:1px dashed #67e8f9;border-radius:6px;padding:1px 6px;font-size:.75rem;font-weight:700}.essay-input{border:2px solid var(--border);resize:vertical;width:100%;min-height:42px;color:var(--text);background:#fff;border-radius:10px;padding:10px 12px;font-family:inherit;font-size:.9rem;line-height:1.4}.essay-input.graded-full{border-color:var(--correct);background:var(--correct-bg)}.essay-input.graded-partial{border-color:var(--warning);background:var(--warning-bg)}.essay-input.graded-zero{border-color:var(--wrong);background:var(--wrong-bg)}.essay-line-score{margin-top:4px;font-size:.78rem;font-weight:700;display:none}.essay-line-score.visible{justify-content:space-between;align-items:center;gap:6px;display:flex}.essay-line-score .pct-full{color:var(--correct)}.essay-line-score .pct-partial{color:var(--warning)}.essay-line-score .pct-zero{color:var(--wrong)}.essay-line-answer{color:var(--text-muted);font-size:.78rem;font-style:italic}.essay-btn-group{gap:8px;margin-top:4px;margin-bottom:16px;display:flex}.essay-btn-group .btn{flex:1}#auth-gate:not([hidden]){z-index:10000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#0f172ab8;place-items:center;padding:24px 16px;display:grid;position:fixed;inset:0;overflow-y:auto}.auth-card{border:1px solid var(--border);background:var(--card-bg);border-radius:18px;width:min(100%,440px);padding:28px;box-shadow:0 24px 64px #0f172a47}.auth-card h2{color:var(--primary);margin:0 0 8px;font-size:1.35rem}.auth-intro{color:var(--text-muted);margin:0 0 20px;line-height:1.5}.auth-tabs{background:var(--bg);border-radius:10px;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:18px;padding:4px;display:grid}.auth-tab,.auth-reset{color:var(--text-muted);cursor:pointer;font:inherit;background:0 0;border:0}.auth-tab{border-radius:7px;padding:9px;font-weight:700}.auth-tab.active{color:var(--primary);background:#fff;box-shadow:0 1px 3px #0f172a22}.auth-field{color:var(--text);gap:6px;margin:14px 0;font-size:.9rem;font-weight:650;display:grid}.auth-field input{border:1px solid var(--border);width:100%;min-height:42px;color:var(--text);font:inherit;border-radius:8px;padding:9px 11px}.auth-submit{background:var(--primary);color:#fff;cursor:pointer;width:100%;min-height:44px;font:inherit;border:0;border-radius:9px;margin-top:8px;font-weight:750}.auth-submit:disabled{opacity:.65;cursor:wait}.auth-continue{border:1px solid var(--primary);width:100%;min-height:40px;color:var(--primary);cursor:pointer;font:inherit;background:#fff;border-radius:8px;margin:0 0 10px;font-weight:700}.auth-account-trigger{z-index:9999;background:var(--primary);color:#fff;cursor:pointer;font:inherit;border:0;border-radius:999px;padding:10px 14px;font-weight:700;position:fixed;bottom:14px;right:14px;box-shadow:0 4px 16px #0f172a33}.auth-reset{margin:14px auto 0;text-decoration:underline;display:block}.auth-note{color:var(--text-muted);margin:14px 0 0;font-size:.82rem;line-height:1.5}.auth-message{min-height:1.3em;color:var(--secondary);margin:12px 0 0;font-size:.88rem}.auth-message[data-state=error]{color:var(--wrong)}.teacher-dashboard{width:min(100%,1080px);max-height:calc(100vh - 48px);overflow:auto}.teacher-report-actions{grid-template-columns:1fr 1fr;gap:10px;display:grid}.teacher-report-actions .auth-continue,.teacher-report-actions .auth-submit{margin:0}.teacher-report-actions .auth-submit:disabled{opacity:.55;cursor:wait}.teacher-table-wrap{border:1px solid var(--border);border-radius:10px;width:100%;margin-top:10px;overflow:auto}.teacher-report-table{border-collapse:collapse;width:100%;min-width:780px;font-size:.84rem}.teacher-report-table th,.teacher-report-table td{border-bottom:1px solid var(--border);text-align:left;vertical-align:top;padding:10px}.teacher-report-table th{z-index:1;color:var(--primary);background:#eff6ff;position:sticky;top:0}.teacher-report-table td small{color:var(--text-muted);margin-top:3px;display:block}.teacher-report-table details summary{color:var(--primary);cursor:pointer;font-weight:650}.teacher-report-table details ul{padding:8px 0 0 18px}.teacher-report-table details li{margin:0 0 6px}@media (width<=600px){.teacher-report-actions{grid-template-columns:1fr}}@media (width<=480px){.auth-card{padding:22px 18px}}