:root{--bg:#f1f5f9;--card:#fff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--brand:#4f46e5;--brand-2:#6366f1;--brand-dark:#312e81;--accent:#f59e0b;--danger:#dc2626;--ok:#16a34a;--warn:#d97706;--radius:16px;--shadow:0 8px 24px rgba(15,23,42,.08);--shadow-sm:0 1px 3px rgba(15,23,42,.08);--tap:44px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body,html{padding:0;margin:0;font-family:Segoe UI,Roboto,-apple-system,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);overscroll-behavior-y:contain}h1,h2,h3,h4{margin:0}button{font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;font-size:inherit}a{color:var(--brand);text-decoration:none}.app-shell{min-height:100dvh;padding-bottom:86px}.container{max-width:980px;margin:0 auto;padding:12px 12px 24px;display:flex;flex-direction:column;gap:14px}.topbar{justify-content:space-between;padding:12px 14px;background:linear-gradient(120deg,#4f46e5,#6d28d9);color:#fff;box-shadow:0 6px 18px rgba(79,70,229,.32)}.topbar,.topbar .brand{display:flex;align-items:center;gap:10px}.topbar .brand{min-width:0}.topbar .brand-badge{width:38px;height:38px;border-radius:11px;background:hsla(0,0%,100%,.18);display:grid;place-items:center;font-size:18px;flex:0 0 auto}.topbar h1{font-size:15.5px;font-weight:800;line-height:1.2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar .brand p{margin:1px 0 0;font-size:11px;opacity:.85}.topbar .btn-icon{color:#fff;background:hsla(0,0%,100%,.14);border-color:hsla(0,0%,100%,.45)}.topbar .btn-icon:active{background:hsla(0,0%,100%,.26)}.syncbar{max-width:980px;width:calc(100% - 24px);display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:8px 12px;margin:10px auto 0;background:#fff;border:1px solid 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var(--line);background:#fff;color:var(--muted);font-size:12px;font-weight:700}.chip.active{background:var(--brand);border-color:var(--brand);color:#fff}.result-list{margin-top:10px;display:flex;flex-direction:column;gap:6px}.result-item{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;text-align:left;padding:10px 11px;border:1px solid var(--line);border-radius:11px;background:#f8fafc}.result-item .r-name{font-size:13.5px;font-weight:700}.result-item .r-sub{font-size:11px;color:var(--muted);margin-top:2px}.result-item .r-roll{font-size:11.5px;font-weight:800;color:var(--brand-dark);background:#eef2ff;border-radius:8px;padding:3px 8px;white-space:nowrap}.student-card{background:#f8fafc;border:1px dashed var(--line);border-radius:12px;padding:12px}.student-card .sc-name{font-size:15px;font-weight:800;margin-bottom:8px}.student-card .sc-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:8px 14px;gap:8px 14px}.student-card 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14px;background:linear-gradient(var(--tone),var(--tone-line));opacity:.9;z-index:0}.tone-0{--tone:#4f46e5;--tone-line:#c7d2fe;--tone-soft:#eef2ff}.tone-1{--tone:#0891b2;--tone-line:#a5f3fc;--tone-soft:#ecfeff}.tone-2{--tone:#d97706;--tone-line:#fde68a;--tone-soft:#fffbeb}.tone-3{--tone:#dc2626;--tone-line:#fecaca;--tone-soft:#fef2f2}.tone-4{--tone:#16a34a;--tone-line:#bbf7d0;--tone-soft:#f0fdf4}.tone-5{--tone:#db2777;--tone-line:#fbcfe8;--tone-soft:#fdf2f8}.item-card .ic-icon{position:absolute;top:13px;left:13px;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;font-size:16px;font-weight:900;line-height:1;color:#fff;background:var(--tone);box-shadow:0 2px 6px rgba(15,23,42,.22);-webkit-user-select:none;-moz-user-select:none;user-select:none;z-index:2}.item-card .ic-add{position:absolute;inset:0;z-index:6;border:0;border-radius:inherit;background:transparent;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.item-card 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