/* Mục Bài viết trao đổi chuyên đề: danh sách, trang đọc, ý kiến góp ý. */
.bv-nut-giua { text-align: center; margin-top: 20px; }
.bv-tim { display: flex; gap: 10px; align-items: center; justify-content: center; margin-top: 16px; font-size: 14px; color: var(--muted); }
.bv-tim input { width: min(320px, 100%); min-height: 40px; padding: 0 12px; border: 1px solid var(--gold-50); background: #fff; font: inherit; }
.bv-luoi { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.bv-the { display: flex; flex-direction: column; gap: 10px; padding: 22px; background: #fff; border: 1px solid var(--gold-30); color: var(--ink); text-decoration: none; transition: border-color .15s, transform .15s; }
.bv-the:hover { border-color: var(--red); color: var(--ink); transform: translateY(-2px); }
.bv-the__nhom { font-size: 12px; font-weight: 600; letter-spacing: .03em; color: var(--red); }
.bv-the__tieu { font-family: var(--serif); font-size: 20px; font-weight: 700; line-height: 1.3; }
.bv-the__sapo { font-size: 14.5px; color: var(--ink-4); }
.bv-the__chan { margin-top: auto; padding-top: 10px; font-size: 13px; color: var(--muted-2); }
.bv-rong { text-align: center; color: var(--muted); }
.bv-sap { max-width: 640px; margin: 0 auto; padding: 36px; text-align: center; background: #fff; border: 1px solid var(--gold-30); }
.bv-sap h2 { font-family: var(--serif); font-size: 22px; margin-bottom: 10px; }
.bv-fan { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; justify-content: space-between; margin-top: 40px; padding: 24px 28px; background: var(--bg-tint); border: 1px solid var(--gold-30); }
.bv-fan__t { font-family: var(--serif); font-size: 20px; font-weight: 700; }
.bv-nhan-nho { margin-top: 20px; text-align: center; font-size: 13px; color: var(--muted); }

.bv-dau { padding: 44px 0 30px; border-bottom: 1px solid var(--gold-30); }
.bv-doc { max-width: 820px; }
.bv-nhan { display: inline-block; padding: 3px 10px; font-size: 12.5px; font-weight: 600; color: var(--red); border: 1px solid var(--gold-50); background: #fff; }
.bv-dau h1 { margin-top: 14px; font-family: var(--serif); font-size: clamp(28px, 3.8vw, 40px); font-weight: 700; line-height: 1.22; }
.bv-sapo { margin-top: 16px; font-size: 18.5px; line-height: 1.55; color: var(--ink-3); }
.bv-meta { display: flex; flex-wrap: wrap; gap: 4px 18px; margin-top: 16px; font-size: 14px; color: var(--muted); }
.bv-khung { display: grid; grid-template-columns: 230px minmax(0, 720px); gap: 48px; justify-content: center; padding-top: 36px; padding-bottom: 60px; }
.bv-ben { position: sticky; top: 88px; align-self: start; display: grid; gap: 24px; font-size: 14px; max-height: calc(100vh - 110px); overflow: auto; }
.bv-ben p { font-size: 12px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 8px; }
.bv-muc a { display: block; padding: 5px 0 5px 10px; border-left: 2px solid var(--gold-30); color: var(--ink-4); text-decoration: none; line-height: 1.4; }
.bv-muc a:hover, .bv-muc a.is-on { border-left-color: var(--red); color: var(--red); }
.bv-chia { display: grid; gap: 6px; justify-items: start; }
.bv-chia a, .bv-chia button { padding: 2px 0; background: none; border: 0; font: inherit; color: var(--ink-3); text-decoration: underline; text-decoration-color: var(--gold-50); text-underline-offset: 3px; cursor: pointer; }
.bv-chia a:hover, .bv-chia button:hover { color: var(--red); }
.bv-noi { font-size: 17.5px; line-height: 1.75; color: var(--ink-2); }
.bv-noi > * + * { margin-top: 18px; }
.bv-noi h2 { margin-top: 38px; font-family: var(--serif); font-size: 25px; line-height: 1.3; scroll-margin-top: 90px; }
.bv-noi h3 { margin-top: 28px; font-family: var(--serif); font-size: 20px; scroll-margin-top: 90px; }
.bv-noi ul, .bv-noi ol { padding-left: 24px; }
.bv-noi ul { list-style: disc; }
.bv-noi ol { list-style: decimal; }
.bv-noi li + li { margin-top: 6px; }
.bv-noi blockquote { margin: 22px 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--gold); font-family: var(--serif); font-style: italic; color: var(--ink-3); }
.bv-noi figure { margin: 26px 0; }
.bv-noi img { width: 100%; height: auto; border: 1px solid var(--gold-30); }
.bv-noi figcaption { margin-top: 8px; font-size: 14px; color: var(--muted); }
.bv-noi sup a { text-decoration: none; font-weight: 600; }
.bv-bang { overflow-x: auto; }
.bv-bang table { width: 100%; border-collapse: collapse; font-size: 15.5px; background: #fff; }
.bv-bang th { padding: 9px 12px; text-align: left; font-weight: 600; background: var(--bg-tint); border-bottom: 1px solid var(--gold-50); }
.bv-bang td { padding: 9px 12px; border-bottom: 1px solid var(--gold-30); }
.bv-ds-tk { font-size: 14.5px; line-height: 1.6; color: var(--ink-4); }
.bv-ds-tk li { scroll-margin-top: 90px; }
.bv-nguon { margin-top: 30px; padding-top: 16px; border-top: 1px solid var(--gold-30); font-size: 14.5px; color: var(--ink-4); }
.bv-luu-y { margin-top: 18px; padding: 14px 16px; background: var(--bg-tint); border-left: 3px solid var(--gold); font-size: 14px; line-height: 1.6; color: var(--ink-3); }
.bv-hop { margin-top: 36px; }
.bv-hop h2 { font-family: var(--serif); font-size: 22px; }
.bv-sao { display: flex; gap: 2px; margin-top: 8px; }
.bv-sao button { width: 40px; height: 44px; padding: 0; background: none; border: 0; font-size: 28px; line-height: 1; color: #D8D2C4; cursor: pointer; }
.bv-sao button.is-on, .bv-sao:hover button:hover, .bv-sao button:focus-visible { color: var(--gold); }
.bv-sao__kq { min-height: 22px; font-size: 14px; color: var(--muted); }
.bv-the-td { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.bv-the-td button { min-height: 36px; padding: 0 12px; background: #fff; border: 1px solid var(--gold-50); font: inherit; font-size: 14px; cursor: pointer; }
.bv-the-td button[aria-selected="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.bv-td { margin: 10px 0 0; padding: 14px 16px; background: #fff; border: 1px solid var(--gold-30); font-family: var(--sans); font-size: 14.5px; line-height: 1.6; white-space: pre-wrap; overflow-wrap: anywhere; }
.bv-td__nut { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.bv-yk__dan { margin-top: 6px; font-size: 14.5px; color: var(--ink-4); }
.bv-yk { margin-top: 16px; display: grid; gap: 12px; }
.bv-yk:empty { display: none; }
.bv-yk li { padding: 14px 16px; background: #fff; border: 1px solid var(--gold-30); font-size: 15.5px; overflow-wrap: anywhere; white-space: pre-line; }
.bv-yk__ai { display: block; font-size: 13.5px; color: var(--muted); white-space: normal; }
.bv-yk__ai b { color: var(--ink); }
.bv-yk__tl { margin-top: 10px; padding: 10px 12px; background: var(--bg-tint); border-left: 3px solid var(--red); font-size: 15px; }
.bv-yk__form { margin-top: 18px; max-width: 620px; }
.bv-yk__form .form__row { display: block; margin-top: 12px; }
.bv-yk__form label { display: block; font-size: 14px; font-weight: 500; }
.bv-yk__form input[type="text"], .bv-yk__form input:not([type]), .bv-yk__form textarea { width: 100%; margin-top: 4px; padding: 9px 11px; border: 1px solid var(--gold-50); background: #fff; font: inherit; }
.bv-yk__form .bv-dy { display: flex; gap: 8px; align-items: flex-start; margin: 14px 0; font-weight: 400; }
.bv-yk__form .bv-dy input { flex: none; width: auto; margin: 5px 0 0; }
.bv-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.bv-yk__loi { margin: 8px 0; color: var(--red); font-size: 14.5px; }
.bv-yk__xong { margin-top: 14px; padding: 12px 14px; background: var(--bg-tint); border-left: 3px solid var(--gold); }
.bv-fb { margin-top: 12px; font-size: 14.5px; }
.bv-trich { position: absolute; z-index: 40; transform: translate(-50%, -100%); }
.bv-trich button { padding: 6px 12px; background: var(--ink); color: #fff; border: 0; font: inherit; font-size: 13px; cursor: pointer; }
.bv-lien { padding: 54px 0; }
.bv-lien .bv-luoi { margin-top: 24px; }
@media (max-width: 980px) {
  .bv-khung { grid-template-columns: minmax(0, 1fr); gap: 24px; max-width: 760px; }
  .bv-ben { position: static; max-height: none; }
  .bv-chia { display: flex; flex-wrap: wrap; gap: 8px 16px; }
  .bv-chia p { width: 100%; margin-bottom: 0; }
  .bv-luoi { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .bv-luoi { grid-template-columns: minmax(0, 1fr); }
  .bv-noi { font-size: 16.5px; }
  .bv-tim { flex-direction: column; align-items: stretch; }
}
@media print {
  .nav, .footer, .bv-ben, .bv-hop, .bv-lien, .skip, .bv-trich { display: none !important; }
  .bv-khung { display: block; padding: 0; }
  .bv-noi { font-size: 12.5pt; }
}