:root{--teal: #0ea5e9;--teal-dark: #0369a1;--teal-tint: #e0f2fe;--amber: #f59e0b;--bg: #f1f5f9;--surface: #ffffff;--ink: #0f172a;--muted: #64748b;--line: #e2e8f0;--danger: #dc2626;--radius: 14px;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .06);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Arabic,Segoe UI,Tahoma,Noto Naskh Arabic,system-ui,sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);-webkit-tap-highlight-color:transparent}#root{min-height:100vh}.app{max-width:640px;margin:0 auto;min-height:100vh;background:var(--bg);display:flex;flex-direction:column}.header{position:sticky;top:0;z-index:10;background:var(--teal);color:#fff;padding:14px 18px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow)}.header .title{font-size:1.15rem;font-weight:700;margin:0}.header-right{margin-inline-start:auto;display:flex;align-items:center;gap:10px}.header .teacher-name{font-size:.9rem;opacity:.9;display:flex;align-items:center;gap:6px}.header .logout{background:#ffffff26;border:none;color:#fff;padding:6px 12px;border-radius:10px;font-size:.82rem;font-weight:600;font-family:inherit;cursor:pointer}.header .logout:active{background:#ffffff47}.sync-pill{border:none;border-radius:999px;padding:4px 11px;font-size:.76rem;font-weight:700;font-family:inherit;cursor:pointer;white-space:nowrap}.sync-ok{background:#ffffffe6;color:#0369a1}.sync-pending{background:var(--amber);color:#422006}.sync-busy{background:#ffffffe6;color:var(--muted)}.sync-off{background:#ffffff38;color:#fff}.info-box{background:#fffbeb;border:1px solid #fde68a;color:#78350f;border-radius:12px;padding:12px 14px;font-size:.86rem;line-height:1.7;text-align:start;margin-bottom:12px}.welcome-card code{background:#f1f5f9;border-radius:6px;padding:1px 5px;font-size:.85em}.header .back{background:#ffffff26;border:none;color:#fff;width:36px;height:36px;border-radius:10px;font-size:1.2rem;cursor:pointer;display:grid;place-items:center}.header .back:active{background:#ffffff47}.content{padding:18px;flex:1}.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:14px}.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:14px}.section-title{display:flex;align-items:center;justify-content:space-between;margin:4px 0 12px}.section-title h2{font-size:1.05rem;margin:0}.list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.list-item{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 16px;display:flex;align-items:center;gap:12px;cursor:pointer;border:1px solid transparent;transition:border-color .15s}.list-item:active{border-color:var(--teal-tint)}.list-item .primary{font-weight:600}.list-item .secondary{font-size:.85rem;color:var(--muted);margin-top:2px}.list-item .chevron{margin-inline-start:auto;color:var(--muted);font-size:1.1rem}.roster-badge{min-width:34px;height:34px;padding:0 6px;border-radius:10px;background:var(--teal-tint);color:var(--teal-dark);font-weight:700;display:grid;place-items:center;font-size:.9rem}.pill{display:inline-block;padding:2px 10px;border-radius:999px;background:var(--teal-tint);color:var(--teal-dark);font-size:.78rem;font-weight:600}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;border-radius:12px;padding:12px 18px;font-size:.98rem;font-weight:600;cursor:pointer;font-family:inherit;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:var(--teal);color:#fff}.btn-primary:active{background:var(--teal-dark)}.btn-primary:disabled{background:#94a3b8;cursor:not-allowed}.btn-ghost{background:var(--surface);color:var(--teal-dark);border:1px solid var(--line)}.btn-block{width:100%}.btn-danger{background:transparent;color:var(--danger);border:1px solid #fecaca}.btn-sm{padding:8px 12px;font-size:.85rem;border-radius:10px}.field{margin-bottom:14px}.field label{display:block;font-size:.9rem;font-weight:600;margin-bottom:6px;color:var(--ink)}.input,.textarea,.select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;font-size:1rem;font-family:inherit;background:var(--surface);color:var(--ink)}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px var(--teal-tint)}.textarea{min-height:180px;resize:vertical;line-height:1.9}.hint{font-size:.82rem;color:var(--muted);margin-top:6px}.error{color:var(--danger);font-size:.85rem;margin-top:6px}.empty{text-align:center;padding:40px 20px;color:var(--muted)}.empty .emoji{font-size:2.4rem;margin-bottom:10px}.review-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}.review-row:last-child{border-bottom:none}.review-row .num{min-width:28px;color:var(--muted);font-size:.85rem;text-align:center}.review-row .input{flex:1;padding:8px 12px}.review-row .remove{background:transparent;border:none;color:var(--danger);font-size:1.3rem;cursor:pointer;width:34px;height:34px;border-radius:8px}.review-row .remove:active{background:#fee2e2}.action-bar{display:flex;gap:10px;margin-top:16px}.action-bar .btn{flex:1}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:flex;align-items:flex-end;justify-content:center;z-index:50;padding:0}.modal{background:var(--surface);width:100%;max-width:640px;border-radius:20px 20px 0 0;padding:20px;max-height:90vh;overflow-y:auto;animation:sheet-up .2s ease-out}@keyframes sheet-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}.modal h3{margin:0 0 16px;font-size:1.1rem}.welcome{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(160deg,var(--teal) 0%,var(--teal-dark) 100%)}.welcome-card{background:var(--surface);border-radius:20px;padding:28px 24px;width:100%;max-width:400px;box-shadow:0 10px 40px #0003;text-align:center}.welcome-card .logo{font-size:3rem;margin-bottom:8px}.welcome-card h1{margin:0 0 4px;font-size:1.5rem;color:var(--teal-dark)}.welcome-card p{color:var(--muted);margin:0 0 22px;font-size:.95rem}.grade-input{width:90px;text-align:center}.grade-value{font-weight:700;color:var(--teal-dark)}.grade-max{color:var(--muted);font-size:.85rem}.scanner-frame{position:relative;width:100%;aspect-ratio:1 / 1;max-height:70vh;background:#0f172a;border-radius:var(--radius);overflow:hidden;display:grid;place-items:center}.scanner-video{width:100%;height:100%;object-fit:cover;display:block}.scanner-reticle{position:absolute;top:18%;right:18%;bottom:18%;left:18%;border:3px solid rgba(255,255,255,.9);border-radius:18px;box-shadow:0 0 0 100vmax #0f172a59;pointer-events:none}.scanner-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-content:center;gap:8px;text-align:center;padding:24px;color:#fff;background:#0f172ab8;font-size:.95rem;line-height:1.7}.scanner-overlay p{margin:0;max-width:320px}.scanner-overlay .emoji{font-size:2.4rem}.scanner-overlay-error{color:#fecaca}.scanner-overlay-error .emoji{color:#fff}.result-accept{background:linear-gradient(160deg,var(--teal) 0%,var(--teal-dark) 100%);color:#fff;text-align:center}.composite-hero{padding:12px 8px}.composite-label{font-size:.95rem;opacity:.9}.composite-value{font-size:4rem;font-weight:800;line-height:1.1;margin:4px 0}.composite-formula{font-size:.9rem;opacity:.85;direction:ltr}.detail-list{margin:0;padding:0}.detail-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 2px;border-bottom:1px solid var(--line)}.detail-row:last-child{border-bottom:none}.detail-row dt{color:var(--muted);font-size:.9rem}.detail-row dd{margin:0;font-weight:700;color:var(--ink);text-align:end;word-break:break-word}.result-reject{text-align:center}.result-reject .result-icon{font-size:2.8rem;margin-bottom:6px}.result-reject h3{margin:0 0 8px;color:var(--danger)}.result-reason{color:var(--ink);background:#fef2f2;border:1px solid #fecaca;border-radius:12px;padding:12px 14px;margin:0 0 16px;font-size:.95rem;line-height:1.7}