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:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:radial-gradient(120% 120% at 20% 20%,#f7fbff,#e4f0ff 42%,#d4e7ff 78%);--panel:#eaf4ffe6;--panel-strong:#daebfff7;--border-subtle:#5890cc47;--border-strong:#5890cc73;--text-primary:#0f2035;--text-muted:#52708f;--accent:#5ab3ff;--accent-2:#7bd3ff;--accent-3:#b7a5ff;--success:#4dbf9f;--warning:#f2b880;--danger:#ef8aa4;--radius-lg:22px;--radius-md:14px;--radius-sm:10px;--shadow-soft:0 24px 60px #75a2d638;--color-bg:var(--bg);--color-panel:var(--panel);--color-panel-strong:var(--panel-strong);--color-border:var(--border-subtle);--color-border-strong:var(--border-strong);--color-ink-900:var(--text-primary);--color-ink-700:#2a4764;--color-ink-500:var(--text-muted);--color-ink-300:#7b93ad;--color-primary:var(--accent);--color-primary-soft:#cbe6ff;--color-danger:var(--danger);--color-danger-soft:#ef8aa42e;--color-success:var(--success);--shadow-card:0 18px 40px #75a2d638}body{color:var(--color-ink-900);background:var(--color-bg)}h1,h2,h3,h4{color:var(--color-ink-900)}p{color:var(--color-ink-500)}
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var(--color-border);justify-content:space-between;align-items:center;padding:24px 28px;display:flex}.modal-header h2{color:var(--color-ink-900);margin:0;font-size:24px;font-weight:700}.modal-close{color:var(--color-ink-500);cursor:pointer;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;padding:0;font-size:28px;line-height:1;transition:all .2s;display:flex}.modal-close:hover{color:var(--color-ink-900);background:#0000000d}.modal-form{flex-direction:column;gap:20px;padding:28px;display:flex}.form-field{flex-direction:column;gap:8px;display:flex}.form-field span{color:var(--color-ink-700);font-size:14px;font-weight:600}.form-field--full{grid-column:1/-1}.form-helper{color:var(--color-ink-500);margin-top:-4px;font-size:12px}.modal-actions{border-top:1px solid var(--color-border);justify-content:flex-end;gap:12px;margin-top:8px;padding-top:20px;display:flex}.modal-content--large{max-width:800px;max-height:90vh}.attach-filters{grid-template-columns:2fr 1fr 1fr;gap:12px;margin-bottom:20px;display:grid}.attach-list-header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;margin-bottom:12px;padding:12px 0;display:flex}.attach-checkbox{cursor:pointer;color:var(--color-ink-700);align-items:center;gap:8px;font-weight:600;display:flex}.attach-checkbox input[type=checkbox]{cursor:pointer;width:18px;height:18px}.attach-count{color:var(--color-ink-500);font-size:14px;font-weight:600}.attach-list{flex-direction:column;gap:8px;max-height:400px;margin-bottom:20px;display:flex;overflow-y:auto}.attach-item{border:1px solid var(--color-border);cursor:pointer;background:#fff;border-radius:12px;align-items:flex-start;gap:12px;padding:12px;transition:all 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#89a2ff59}.ui-button:hover{transform:translateY(-1px)}.ui-button--secondary{color:var(--color-ink-900);border-color:var(--color-border);box-shadow:none;background:#7bcaff24}.ui-button--danger{color:var(--color-ink-900);box-shadow:none;background:#ef8aa42e;border-color:#ef8aa466}.ui-button--success{color:var(--color-ink-900);box-shadow:none;background:#4dbf9f33;border-color:#4dbf9f66}.ui-button--warning{color:var(--color-ink-900);box-shadow:none;background:#f2b88033;border-color:#f2b88066}.ui-button--info{color:var(--color-ink-900);box-shadow:none;background:#7bd3ff38;border-color:#7bd3ff66}.ui-card{border:1px solid var(--color-border);background:linear-gradient(145deg,var(--color-panel),var(--color-panel-strong));box-shadow:var(--shadow-card);border-radius:18px;padding:16px}.ui-input{border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-ink-900);background:#e6f3fff0;height:44px;padding:10px 12px;font-size:20px}.ui-table{border:1px solid var(--color-border);border-radius:14px;overflow:hidden}.teacher-button{color:#0c1e33;cursor:pointer;z-index:10010;background:linear-gradient(135deg,#a9d4ff,#b49dff);border:none;border-radius:50%;justify-content:center;align-items:center;width:64px;height:64px;transition:transform .18s,box-shadow .18s;display:flex;position:fixed;bottom:24px;right:24px;box-shadow:0 12px 30px #0d203f4d}.teacher-button:focus-visible{outline-offset:4px;outline:3px solid #7bcaffe6}.teacher-button:hover{transform:translateY(-2px)scale(1.02);box-shadow:0 18px 36px #0d203f59}.teacher-button__icon{font-size:30px}.teacher-panel{border:1px solid var(--color-border);z-index:10005;background:#fffffffa;border-radius:20px;flex-direction:column;gap:12px;width:min(420px,90vw);padding:18px 20px 24px;display:flex;position:fixed;bottom:110px;right:24px;box-shadow:0 30px 60px 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