/* ── Admin: gán bài vào contest/chủ đề ── */
.assign-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin:10px 0 26px}
.assign-card{border:1px solid var(--border,#d7dee9);border-radius:10px;padding:12px 14px;display:flex;flex-direction:column;gap:8px;background:var(--card,#fff)}
.assign-card .assign-title{font-weight:600;font-size:14.5px}
.assign-fields{display:flex;gap:10px;align-items:end}
.assign-fields label{display:flex;flex-direction:column;font-size:12px;color:var(--muted,#667);gap:3px}
.assign-fields input{width:64px}
.assign-card button{align-self:flex-start}
.row-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.abtn-mini{display:inline-block;font-size:12.5px;padding:4px 10px;border:1px solid var(--border,#c9d3e0);border-radius:8px;text-decoration:none;white-space:nowrap}
.abtn-mini:hover{background:var(--hover,#eef2f7)}
html.dark .assign-card{background:#16202e;border-color:#243247}
html.dark .abtn-mini{border-color:#2c3c55}
html.dark .abtn-mini:hover{background:#1c2940}