.grammar-explain-btn {
  display: inline-flex;
  align-items: center;
  gap: .38rem;
  min-height: 32px;
  padding: .38rem .7rem;
  border: 1px solid rgba(201,168,76,.42);
  border-radius: 999px;
  background: rgba(201,168,76,.09);
  color: var(--navy, #0d1b2a);
  font: 700 .72rem/1 Inter, sans-serif;
  cursor: pointer;
  transition: transform .16s ease, background .16s ease, border-color .16s ease;
}
.grammar-explain-btn:hover { transform: translateY(-1px); background: rgba(201,168,76,.17); border-color: #c9a84c; }
.grammar-explain-btn span { display:grid; place-items:center; width:17px; height:17px; border-radius:50%; background:#c9a84c; color:#0d1b2a; font-size:.67rem; }
.grammar-rule + .grammar-explain-btn { margin-left: 1.5rem; }
.grammar-modal[hidden] { display: none; }
.grammar-modal { position: fixed; inset: 0; z-index: 10000; display: grid; place-items: center; padding: 1rem; }
.grammar-modal__backdrop { position: absolute; inset: 0; background: rgba(6,15,26,.72); backdrop-filter: blur(6px); }
.grammar-modal__panel {
  position: relative;
  width: min(680px, 100%);
  max-height: min(82vh, 760px);
  overflow: auto;
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid rgba(201,168,76,.35);
  border-radius: 24px;
  background: #fffdf8;
  color: #172033;
  box-shadow: 0 28px 80px rgba(0,0,0,.32);
}
.grammar-modal__close { position:absolute; top:.9rem; right:.9rem; width:38px; height:38px; border:1px solid #ded8ca; border-radius:50%; background:#fff; color:#263247; font-size:1.5rem; line-height:1; cursor:pointer; }
.grammar-modal__kicker { color:#9a7724; font:800 .68rem/1 Inter,sans-serif; letter-spacing:.14em; text-transform:uppercase; }
.grammar-modal h2 { margin:.42rem 2.8rem 1rem 0; color:#0d1b2a; font:700 clamp(1.55rem,5vw,2.15rem)/1.15 'Playfair Display',Georgia,serif; }
.grammar-modal__summary { margin:0 0 1rem; padding:.85rem 1rem; border-left:3px solid #c9a84c; border-radius:0 10px 10px 0; background:#f8f1df; font-size:.91rem; line-height:1.62; }
.grammar-modal__correction { display:flex; align-items:center; flex-wrap:wrap; gap:.65rem; margin:0 0 1rem; padding:.75rem .9rem; border:1px solid #eadfbe; border-radius:12px; background:#fff; font-size:.9rem; }
.grammar-modal__correction span { color:#8b3440; text-decoration:line-through; }
.grammar-modal__correction b { color:#b28a2e; }
.grammar-modal__correction strong { color:#187448; }
.grammar-modal__section { padding: .9rem 0; border-top:1px solid #e9e4da; }
.grammar-modal__section h3 { margin:0 0 .48rem; color:#916f20; font:800 .7rem/1 Inter,sans-serif; letter-spacing:.1em; text-transform:uppercase; }
.grammar-modal__section p, .grammar-modal__section li { font-size:.88rem; line-height:1.62; }
.grammar-modal__section ul { margin:0; padding-left:1.2rem; }
.grammar-modal__patterns { display:flex; flex-wrap:wrap; gap:.45rem; padding:0!important; list-style:none; }
.grammar-modal__patterns li { padding:.42rem .65rem; border:1px solid #e1d6b8; border-radius:8px; background:#fbf7ec; font-weight:650; }
.grammar-modal__examples { display:grid; gap:.5rem; padding:0!important; list-style:none; }
.grammar-modal__examples li { display:grid; gap:.12rem; padding:.62rem .75rem; border-radius:10px; background:#f3f6f8; }
.grammar-modal__examples span { color:#637083; font-size:.76rem; }
.grammar-modal__check { margin-top:.5rem; padding:.85rem 1rem; border-radius:12px; background:#0d1b2a; color:#fff; font-size:.86rem; line-height:1.55; }
.grammar-modal__check span { display:block; margin-bottom:.18rem; color:#e4c86d; font-size:.65rem; font-weight:800; letter-spacing:.1em; text-transform:uppercase; }
.grammar-modal-open { overflow:hidden; }
.wr-err[data-type], .error[data-grammar-explain] { cursor:pointer; }
@media (max-width: 600px) {
  .grammar-modal { align-items:end; padding:0; }
  .grammar-modal__panel { width:100%; max-height:88vh; border-radius:22px 22px 0 0; padding:1.25rem 1rem 1.6rem; }
  .grammar-rule + .grammar-explain-btn { margin-left:0; }
}