/* student-math bundle: grade rows + scientific keypad. */
.uct .sm-rowhead,.uct .sm-row{display:grid;grid-template-columns:minmax(0,1fr) 80px 54px 32px;gap:6px;align-items:center}
.uct .sm-rowhead{margin-top:14px;font-size:12.5px;font-weight:600;color:var(--muted)}
.uct .sm-row{margin-top:6px}
.uct .sm-row input:not([type=range]),.uct .sm-row select{padding:10px 8px;min-width:0}
.uct .sm-row button{border:0;background:var(--bg);border-radius:8px;height:36px;cursor:pointer;font:inherit;font-size:18px;color:var(--ink)}
.uct .sm-add{margin-top:12px;min-height:42px;padding:9px 16px;font-size:14.5px}
.uct .sm-prev{margin-top:6px}
.uct .sm-disp{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
.uct .sm-res{min-height:34px;margin-top:6px;text-align:right;font-size:24px;font-weight:800;color:var(--ink);overflow-wrap:anywhere}
.uct .sm-res.bad{font-size:14px;font-weight:600;color:var(--bad)}
.uct .sm-mode{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:10px}
.uct .sm-keys{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;margin-top:8px}
.uct .sm-keys button{min-height:46px;padding:0;border:1.5px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font:inherit;font-weight:700;font-size:15px;cursor:pointer}
.uct .sm-keys button.fn{background:var(--bg);font-size:13.5px}
.uct .sm-keys button.op{color:var(--accent)}
.uct .sm-keys button.eq{border-color:var(--accent);background:var(--accent);color:#fff}
.uct .sm-keys button:focus-visible{outline:3px solid #2563eb;outline-offset:2px}