/* LỊCH KHAI GIẢNG — CSS dùng chung (7/10/2026 chuyển từ <style> trong khối LOPHOC của index.html sang đây,
   vì lịch giờ nằm ở từng trang giới thiệu /gioi-thieu/<kỳ-thi>/ — Roger 7/10: "bỏ lớp học khai giảng, mang về từng nhóm SP"). */
.lh-khoi{margin:26px 0 4px}
.lh-khoi>h2{color:var(--navy);margin:0 0 4px}
.lh-lead{margin:0 0 14px;color:var(--muted);font-size:14.5px;max-width:860px}
.lh-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 14px}
/* ĐT (Roger 15/9): dãy ô IELTS/SAT/AP… DÍNH theo khi cuộn trong khu lịch (sticky trong .lh-khoi nên hết khu là thôi), một hàng cuộn ngang */
@media (max-width:720px){
  .lh-tabs{position:sticky;top:var(--lhTabTop,47px);z-index:30;background:var(--bg,#f5f7fb);flex-wrap:nowrap;overflow-x:auto;gap:6px;margin:0 -11px 12px;padding:8px 11px;scrollbar-width:none;box-shadow:0 6px 8px -8px rgba(15,23,42,.25)}
  .lh-tabs::-webkit-scrollbar{display:none}
  .lh-tab{flex:0 0 auto;white-space:nowrap;font-size:14px;padding:7px 15px}
}
.lh-tab{border:1.5px solid var(--line);background:var(--card,#fff);color:var(--navy);font-weight:800;font-size:15px;padding:8px 24px;border-radius:999px;cursor:pointer}
.lh-tab.on{border-color:var(--lhc);background:var(--lhc);color:#fff}
.lh-tab small{display:block;font-size:11px;font-weight:600;line-height:1.15;letter-spacing:.1px;opacity:.85}   /* "Lớp 6" xuống hàng "Trần Đại Nghĩa" (Roger 15/9) */
.lh-tabs{align-items:stretch}.lh-tab{display:flex;flex-direction:column;justify-content:center}
.lh-pane{display:none}
.lh-pane.on{display:block}
.lh-mo{margin:0 0 12px;font-size:14.5px;color:var(--navy);font-weight:600}
.lh-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin:0 0 16px}
.lh-card{background:var(--card,#fff);border:1px solid var(--line);border-top:4px solid var(--lhc);border-radius:14px;padding:12px 14px}
.lh-card h4{margin:0 0 2px;font-size:15.5px;color:var(--navy)}
.lh-card .ht{font-size:12.5px;font-weight:700;color:var(--lhc);margin:0 0 7px}
.lh-card ul{margin:0;padding-left:17px;font-size:13.5px;color:#475569;line-height:1.55}
.lh-2cot{display:grid;grid-template-columns:1fr;gap:18px;align-items:start}
.lh-nd h3,.lh-lich h3{margin:0 0 8px;font-size:15.5px;color:var(--navy)}
.lh-nd ul{margin:0;padding-left:17px;font-size:13.5px;line-height:1.65;color:#334155}
.lh-lich .khung{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--card,#fff);container-type:inline-size}
.lh-2cot>*{min-width:0}
/* (28/9/2026) Tab Toán tư duy lớp 1–3 — bộ 8020 THINK MATH, ảnh trang in thật ở /img/thinkmath/ */
.lh-mau{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.lh-mau a{display:block;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff}
.lh-mau img{display:block;width:100%;height:auto;aspect-ratio:744/1052}
.lh-mau-cap{margin:6px 0 0;font-size:12.5px;color:#64748b}
@media(max-width:640px){.lh-mau{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* LƯỚI LỊCH (15/9): mỗi khung 1 dòng gọn, 6 cột co giãn không cuộn ngang; bấm dòng → .mo xổ .lh-ct chi tiết; dưới 640px gập thẻ 3 hàng — xem lhBangHTML trong /lich-hoc.js */
.lh-bang{font-size:13.5px;color:#0f172a}
.lh-bang b{color:var(--navy)}
.lh-dau,.lh-dong{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1.75fr) minmax(0,.8fr) minmax(0,.9fr) auto;gap:0 10px;align-items:center;padding:7px 12px}
.lh-dau{background:var(--lhc);color:#fff;font-size:12px;font-weight:800;padding:7px 12px}
.lh-gon .lh-dau,.lh-gon .lh-dong{grid-template-columns:minmax(0,4fr) minmax(0,.9fr) auto}   /* 7/10 tab AP: tạm bỏ cột Lịch học + Khai giảng (LH_GON) */
.lh-dau span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lh-dau .lh-phu{display:none}
.lh-dong{border-top:1px solid var(--line);line-height:1.3;cursor:pointer;min-height:38px}
.lh-dong:hover{background:#fafbfd}
.lh-dong.lh-an{opacity:.45}
.lh-o{min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lh-o-ten{font-weight:700}
.lh-o-ten-11{white-space:normal;font-weight:600}
.lh-gia-dong{font-weight:600;font-size:12.5px}.lh-trang{font-size:12px;font-weight:600;color:var(--lhc,#4F46E5);text-decoration:underline;text-underline-offset:2px;margin-left:2px}.lh-gia-dong b{font-size:12.5px}
.lh-ten2{font-weight:600;color:#475569}
.lh-mui{display:inline-block;width:6px;height:6px;border-right:1.5px solid #94a3b8;border-bottom:1.5px solid #94a3b8;transform:rotate(45deg);margin:0 0 3px 7px}
.lh-dong.mo .lh-mui{transform:rotate(225deg);margin-bottom:-1px}
.lh-o-lich{font-variant-numeric:tabular-nums;letter-spacing:.1px}
.lh-kh{display:block;white-space:nowrap}   /* 17/9 (Roger): 3 khung giờ/lớp — mỗi giờ một dòng "T3-T5 / T4-T6 · 19:30–21:00" */
.lh-ht{display:inline-block;font-size:10.5px;font-weight:700;line-height:16px;padding:0 6px;border:1px solid;border-radius:6px;margin-left:5px;vertical-align:1px;letter-spacing:.2px}
.lh-ht.on{color:#1d4ed8;border-color:#bfdbfe;background:#eff6ff}
.lh-ht.off{color:#b45309;border-color:#fde68a;background:#fffbeb}
.lh-ht+.lh-ht{margin-left:3px}
.lh-o-kg{white-space:normal}
.lh-o-kg b{font-variant-numeric:tabular-nums}
.lh-ct{display:none;grid-column:1/-1;white-space:normal;font-size:12.5px;color:#475569;line-height:1.5;padding:6px 0 4px;border-top:1px dashed var(--line);margin-top:6px}
.lh-ct span{display:inline-block;margin-right:14px}
.lh-ct b{color:var(--navy)}
.lh-dong.mo .lh-ct{display:block}
.lh-nhom{background:#f8fafc;border-top:1px solid var(--line);font-weight:800;color:var(--lhc);font-size:12px;padding:5px 12px;letter-spacing:.2px}
.lh-nhom .lh-phu{font-weight:600}
.lh-gia-nhom b,.lh-gia-nhom{color:#0b2447;font-variant-numeric:tabular-nums;font-size:12.5px}
.lh-gia-nhom .lh-lienhe{font-size:12px}
.lh-o-ten .lh-mota{white-space:normal;font-size:12px;font-weight:500;color:#64748b;line-height:1.45;margin-top:2px}
.lh-qua{color:#166534;font-weight:700}
.lh-syl{display:block;margin-top:8px}
.lh-gt{display:block;margin-top:8px}
.lh-gt-bang{display:grid;grid-template-columns:auto 1fr;gap:3px 12px;font-size:12.5px;line-height:1.5}
.lh-gt-1{display:contents}.lh-gt-1 b{color:#0b2447;white-space:nowrap}.lh-gt-1 span{display:block;margin:0}
.lh-gt-link{display:inline-block;margin-top:6px;font-weight:700;color:var(--lhc)}
@media(max-width:720px){.lh-gt-bang{grid-template-columns:1fr;gap:6px}.lh-gt-1 b{display:block;margin-bottom:-4px}}
.lh-syl-ten{font-size:12px;font-weight:800;color:var(--lhc);text-transform:uppercase;letter-spacing:.4px;margin:2px 0 4px}
.lh-lv{margin:0 0 8px}
.lh-lv-ten{font-weight:800;color:#0b2447;font-size:13px;margin:4px 0 4px}
.lh-ky{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:4px 18px}
.lh-ky-1 b{display:block;font-size:12.5px;margin-bottom:2px}
.lh-ky-1 ul{margin:0 0 6px 16px;padding:0;font-size:12px;line-height:1.45}
.lh-ky-1 li{margin:1px 0}
.lh-syl-mtieu{margin:0 0 6px}
.lh-syl-bang{display:grid;grid-template-columns:minmax(0,1fr);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.lh-syl-r{display:grid;grid-template-columns:140px minmax(0,1fr);gap:0 12px;padding:7px 10px;border-top:1px solid var(--line);font-size:12.5px;line-height:1.45;align-items:start}
.lh-syl-r:first-child{border-top:0}.lh-syl-r:nth-child(odd){background:#fafbfd}
.lh-syl-k{font-weight:800;color:#0b2447;padding-top:1px}
.lh-syl-v{margin:0;padding:0 0 0 14px;color:#334155}
.lh-syl-v.hai{column-count:2;column-gap:22px}
.lh-syl-v li{margin:1px 0;break-inside:avoid}
.lh-syl-v b{color:#0b2447;font-weight:700}
.lh-syl-g{color:#64748b}
.lh-syl-v .lh-syl-mt{color:#166534;list-style:none;margin-left:-14px;padding-left:0}
.lh-syl-v .lh-syl-mt b{color:#166534}
.lh-chung{border-top:1px solid var(--line);background:#f0fdf4;color:#166534;font-size:12.5px;padding:7px 12px;line-height:1.5;white-space:normal}
.lh-chung b{color:#166534}
@container (max-width:640px){.lh-syl-r{grid-template-columns:minmax(0,1fr)}.lh-syl-k{margin-bottom:1px}.lh-syl-v.hai{column-count:1}}
.lh-phu{font-size:11.5px;color:#94a3b8;font-weight:500}
.lh-chua{color:#94a3b8;font-style:italic}
.lh-lienhe{font-weight:700;color:#64748b}
.lh-gia b{color:#0b2447;font-variant-numeric:tabular-nums}
.lh-trong{color:var(--muted);padding:14px;border-top:1px solid var(--line)}
.lh-lich .ghi{margin:8px 0 0;font-size:12.5px;color:var(--muted)}
.lh-bang .cho{display:inline-block;font-size:11.5px;font-weight:700;padding:2px 9px;border-radius:999px;white-space:nowrap}
.lh-bang .cho.con{background:#dcfce7;color:#166534}
.lh-bang .cho.sap{background:#fef3c7;color:#92400e}
.lh-bang .cho.full{background:#fee2e2;color:#991b1b}
.lh-dk{font:inherit;font-size:12px;font-weight:800;color:#fff;background:var(--lhc);border:0;border-radius:999px;padding:5px 12px;cursor:pointer;white-space:nowrap}
.lh-dk:hover{filter:brightness(.92)}
.lh-dem{display:inline-block;width:44px;height:6px;border-radius:999px;background:#e2e8f0;overflow:hidden;vertical-align:middle}
.lh-dem i{display:block;height:100%;border-radius:999px;background:#f59e0b;min-width:0}
.lh-dem.chac i{background:#16a34a}.lh-dem.full i{background:#dc2626}
.lh-so{font-weight:800;color:#0b2447;font-variant-numeric:tabular-nums}
.lh-chac{display:inline-block;font-size:10.5px;font-weight:800;color:#166534;background:#dcfce7;border-radius:999px;padding:0 6px;vertical-align:middle}
.lh-lich .lh-ranh{display:block;margin:8px 0 0;font:inherit;font-size:13px;font-weight:700;color:var(--lhc);background:#fff;border:1.5px dashed var(--lhc);border-radius:10px;padding:8px 12px;cursor:pointer;text-align:left}
.lh-lich .lh-ranh:hover{background:color-mix(in srgb,var(--lhc) 8%,#fff)}
@container (max-width:640px){
  .lh-dau{display:none}
  .lh-dong{grid-template-columns:minmax(0,1fr) auto auto;grid-template-areas:"ten ten nut" "lich lich nut" "kg cho nut" "ct ct ct";gap:3px 10px;padding:9px 12px;align-items:center}
  .lh-o{white-space:normal;overflow:visible;text-overflow:clip}
  .lh-o-cho .lh-phu{display:none}
  .lh-kh{white-space:normal}.lh-kh-c{white-space:nowrap}   /* ĐT 17/9: 3 khung giờ chiếm cả hàng, ngày khai giảng xuống hàng dưới cạnh Còn chỗ; chữ khung không gãy giữa giờ */
  .lh-o-lich .lh-ht{margin-left:0;margin-right:4px}   /* ĐT: nhãn Online/Offline vẫn hiện (15/9 lần 8) */
  .lh-o-ten{grid-area:ten;font-size:14.5px}
  .lh-o-lich{grid-area:lich}.lh-o-kg{grid-area:kg}.lh-o-cho{grid-area:cho}
  .lh-o-nut{grid-area:nut;justify-self:end}
  .lh-ct{grid-area:ct}
  .lh-o-kg::before{content:"KG ";font-size:11px;color:#94a3b8;font-weight:700}
  .lh-nhom{padding:6px 12px}
  .lh-gon .lh-dong{grid-template-areas:"ten ten nut" "cho cho nut" "ct ct ct"}
}
.lh-gt-tab{display:inline-block;margin-right:8px;font-weight:700;color:var(--lhc)}
.lh-cta{margin:14px 0 0}