:root{--bg:#f6f7fb;--card:#ffffff;--text:#1a1a2e;--muted:#6b7280;--border:#e5e7eb;--primary:#4f46e5;--primary-dark:#4338ca;--primary-soft:#eef2ff;--success:#16a34a;--success-soft:#f0fdf4;--danger:#dc2626;--radius:16px;--shadow:0 1px 3px rgba(16,24,40,0.06),0 8px 24px rgba(16,24,40,0.06)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji;-webkit-font-smoothing:antialiased;line-height:1.55}a{color:var(--primary)}.container{width:100%;max-width:640px;margin:0 auto;padding:24px 18px 64px}.container-wide{max-width:960px}.center-screen{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:24px 18px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.card+.card{margin-top:16px}h1{font-size:1.6rem;letter-spacing:-.02em}h1,h2{margin:0 0 6px}h2{font-size:1.25rem;letter-spacing:-.01em}.subtitle{color:var(--muted);margin:0 0 20px}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:.72rem;font-weight:700;color:var(--primary);margin:0 0 8px}.helper,.muted{color:var(--muted)}.helper{font-size:.92rem;margin:6px 0 0}label{display:block;font-weight:600;font-size:.95rem;margin:0 0 8px}input[type=password],input[type=text],select,textarea{width:100%;font:inherit;color:var(--text);background:#fff;border:1.5px solid var(--border);border-radius:12px;padding:13px 14px;transition:border-color .15s,box-shadow .15s}textarea{resize:vertical;min-height:96px}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}.field{margin-bottom:18px}.btn,button{font:inherit;font-weight:600;cursor:pointer;border:none;border-radius:12px;padding:13px 20px;background:var(--primary);color:#fff;transition:background .15s,transform .05s,opacity .15s}.btn:hover,button:hover{background:var(--primary-dark)}.btn:active,button:active{transform:translateY(1px)}button:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:#fff;color:var(--text);border:1.5px solid var(--border)}.btn-secondary:hover{background:#f9fafb}.btn-ghost{background:transparent;color:var(--primary);padding:10px 12px}.btn-ghost:hover{background:var(--primary-soft)}.btn-block{width:100%}.btn-row{display:flex;gap:12px;margin-top:8px}.btn-row>*{flex:1 1}.progress{height:8px;background:var(--border);border-radius:999px;overflow:hidden;margin-bottom:20px}.progress-bar{height:100%;background:var(--primary);border-radius:999px;transition:width .3s ease}.step-count{font-size:.8rem;color:var(--muted);font-weight:600;margin-bottom:10px}.examples{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 16px}.chip{background:var(--primary-soft);color:var(--primary-dark);border:none;border-radius:999px;padding:7px 13px;font-size:.85rem;font-weight:500;cursor:pointer;text-align:left}.chip:hover{background:#e0e7ff}.examples-label{font-size:.82rem;color:var(--muted);font-weight:600;margin:4px 0 0}.toolbar{flex-wrap:wrap;margin-bottom:20px}.student-row,.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.student-row{padding:16px 0;border-bottom:1px solid var(--border)}.student-row:last-child{border-bottom:none}.student-meta{min-width:0}.student-name{font-weight:600;margin:0 0 2px}.student-sub{font-size:.85rem;color:var(--muted);margin:0;word-break:break-all}.badge{display:inline-block;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:999px;white-space:nowrap}.badge-done{background:var(--success-soft);color:var(--success)}.badge-pending{background:#fff7ed;color:#c2410c}.badge-self{background:var(--primary-soft);color:var(--primary-dark)}.row-actions{display:flex;gap:6px;align-items:center;flex-shrink:0}.qa{padding:14px 0;border-bottom:1px solid var(--border)}.qa:last-child{border-bottom:none}.qa-q{font-weight:600;margin:0 0 4px;font-size:.95rem}.qa-a{margin:0;white-space:pre-wrap}.qa-empty{color:var(--muted);font-style:italic}.meta-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px 20px;gap:12px 20px;margin:0 0 8px}.meta-item .meta-label{font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:700}.meta-item .meta-value{margin:2px 0 0}.highlight-box{background:var(--success-soft);border:1px solid #bbf7d0;border-radius:12px;padding:16px;margin-top:16px}.notice{padding:12px 14px;border-radius:12px;font-size:.9rem;margin-bottom:16px}.notice-error{background:#fef2f2;color:var(--danger);border:1px solid #fecaca}.notice-info{background:var(--primary-soft);color:var(--primary-dark);border:1px solid #c7d2fe}.copy-link{display:flex;gap:8px;align-items:center;margin-top:10px}.copy-link input{font-size:.85rem}.center{text-align:center}.stack>*+*{margin-top:14px}.big-emoji{font-size:3rem;line-height:1;margin-bottom:8px}.footer-link{text-align:center;margin-top:28px;font-size:.85rem}@media (max-width:480px){.meta-grid{grid-template-columns:1fr}.btn-row{flex-direction:column-reverse}}