/* quadratic-function-properties explainer; every selector is scoped to .explain-quadratic-function-properties. */
.explain-quadratic-function-properties .qp-core { margin:16px 0 12px; font-size:15px; font-weight:600; line-height:1.65; }
.explain-quadratic-function-properties .qp-problem { display:flex; align-items:baseline; gap:8px; margin:0 0 12px; padding:10px 14px; border:1px solid #f0dcc0; border-radius:12px; background:#fffaf2; color:#5e4520; font-size:14px; line-height:1.7; }
.explain-quadratic-function-properties .qp-badge { flex:none; padding:1px 7px; border-radius:6px; background:#d98a1f; color:#fff; font-size:11.5px; font-weight:700; letter-spacing:.04em; }
.explain-quadratic-function-properties .qp-explorer { display:grid; gap:10px; padding:14px; border:1px solid #dbe8e4; border-radius:16px; background:linear-gradient(180deg,#f5fbfa,#fbfdfc); }
.explain-quadratic-function-properties .qp-ask { margin:0; color:#33504a; font-size:14px; font-weight:600; }
.explain-quadratic-function-properties .qp-targets { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:8px; }
.explain-quadratic-function-properties .qp-targets button { padding:8px 4px; border:1px solid #d6e6e1; border-radius:11px; background:#fff; color:var(--ink); font:inherit; font-size:15px; cursor:pointer; }
.explain-quadratic-function-properties .qp-targets button[aria-pressed="true"] { border-color:var(--teal); background:#e9f6f2; box-shadow:inset 0 0 0 1px var(--teal); }
.explain-quadratic-function-properties .qp-targets button:focus-visible { outline:3px solid #82cfc7; outline-offset:2px; }
.explain-quadratic-function-properties .qp-grid { display:grid; grid-template-columns:auto repeat(3,minmax(0,1fr)); gap:6px; align-items:center; }
.explain-quadratic-function-properties .qp-col, .explain-quadratic-function-properties .qp-row { display:grid; justify-items:center; color:#33504a; font-size:14px; }
.explain-quadratic-function-properties .qp-col small, .explain-quadratic-function-properties .qp-row small { color:var(--muted); font-size:11.5px; }
.explain-quadratic-function-properties .qp-row { padding-right:4px; }
.explain-quadratic-function-properties .qp-cell { display:grid; gap:2px; margin:0; padding:6px 6px 8px; border:1px solid #e0ebe8; border-radius:12px; background:#fff; transition:opacity .2s, border-color .2s, background .2s; }
.explain-quadratic-function-properties .qp-cell figcaption { color:#46605a; font-size:12.5px; text-align:center; }
.explain-quadratic-function-properties .qp-cell.is-on { border-color:var(--teal); background:#eef8f5; box-shadow:inset 0 0 0 1px var(--teal); }
.explain-quadratic-function-properties .qp-cell.is-on figcaption { color:var(--teal-dark); font-weight:650; }
.explain-quadratic-function-properties .qp-cell.is-off { opacity:.45; }
.explain-quadratic-function-properties .qp-graph { display:block; width:100%; max-width:150px; height:auto; margin:0 auto; }
.explain-quadratic-function-properties .qp-axis { fill:none; stroke:#9dafaa; stroke-width:1.3; }
.explain-quadratic-function-properties .qp-curve { fill:none; stroke:#087f79; stroke-width:3; stroke-linecap:round; }
.explain-quadratic-function-properties .qp-mark { fill:#b6782c; stroke:#fff; stroke-width:1.5; }
.explain-quadratic-function-properties .qp-condition { display:flex; align-items:baseline; gap:8px; margin:0; padding:9px 12px; border:1px solid #bfe0d6; border-radius:11px; background:#eef8f5; font-size:14.5px; font-weight:600; }
.explain-quadratic-function-properties .qp-condition[hidden] { display:none; }
.explain-quadratic-function-properties .qp-tag { flex:none; padding:1px 8px; border-radius:6px; background:#1f3b39; color:#fff; font-size:12px; font-weight:600; }
.explain-quadratic-function-properties .qp-small { margin:0; color:var(--muted); font-size:12.5px; text-align:center; }
.explain-quadratic-function-properties .qp-notes { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; margin:16px 0 0; }
.explain-quadratic-function-properties .qp-note { padding:12px 14px; border:1px solid #e0ebe8; border-radius:14px; background:#fbfdfc; font-size:13.5px; line-height:1.7; }
.explain-quadratic-function-properties .qp-note h3 { margin:0 0 6px; font-size:14px; font-weight:700; }
.explain-quadratic-function-properties .qp-note p { margin:0 0 6px; }
.explain-quadratic-function-properties .qp-note > :last-child { margin-bottom:0; }
.explain-quadratic-function-properties .qp-link { padding:0; border:0; background:none; color:var(--teal-dark); font:inherit; font-weight:650; text-decoration:underline; text-underline-offset:3px; cursor:pointer; }
@media(max-width:760px) {
  .explain-quadratic-function-properties .qp-notes { grid-template-columns:1fr; }
}
@media(max-width:600px) {
  .explain-quadratic-function-properties .qp-core { font-size:14px; }
  .explain-quadratic-function-properties .qp-explorer { padding:10px 8px; }
  .explain-quadratic-function-properties .qp-targets { gap:5px; }
  .explain-quadratic-function-properties .qp-targets button { font-size:13.5px; padding:7px 2px; }
  .explain-quadratic-function-properties .qp-grid { gap:4px; }
  .explain-quadratic-function-properties .qp-row { font-size:12.5px; }
  .explain-quadratic-function-properties .qp-cell { padding:4px 3px 6px; }
  .explain-quadratic-function-properties .qp-cell figcaption { font-size:11.5px; }
}