/* Bài học 9 phần theo sách (hoc.js) + luyện nói (noi.js) — 11/11/2026. Dùng chung biến màu của bjt-dm.css. */
.hoc-nav{position:sticky;top:0;z-index:5;display:flex;gap:6px;overflow-x:auto;padding:10px 4px 8px;margin:0 -4px 14px;background:var(--nen,#f6f8f5);scrollbar-width:none}
.hoc-nav::-webkit-scrollbar{display:none}
.hb{flex:0 0 auto;display:flex;align-items:center;gap:6px;padding:7px 12px 7px 7px;border-radius:99px;background:var(--the,#fff);border:2px solid var(--vien,#dfe6dc);color:var(--chu,#24312a);text-decoration:none;font:700 13px/1.1 "Quicksand",sans-serif;white-space:nowrap}
.hb b{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--vien,#dfe6dc);font-size:12px}
.hb i{font-style:normal;font-size:11px;color:#7a857d;font-family:var(--jp,"Zen Maru Gothic")}
.hb.xong b{background:var(--xanh,#2f8f5b);color:#fff}
.hb.chon{border-color:var(--cam,#f26b1d);background:#fff6ef}
.hb.chon b{background:var(--cam,#f26b1d);color:#fff}
.hoc-noi{max-width:820px;margin:0 auto;padding:0 2px 30px}
.hoc-dau{margin:4px 0 16px}
.hoc-dau h2{margin:4px 0 6px;font:800 24px/1.2 "Baloo 2",sans-serif}
.hoc-dau p{margin:0;color:#5c675f;font-size:15px;line-height:1.55}
.hoc-nhan{display:inline-block;padding:2px 10px;border-radius:6px;background:var(--navy,#0f3d3e);color:#fff;font:700 13px var(--jp,"Zen Maru Gothic")}
.hoc-h3{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:22px 0 10px;font:800 18px "Baloo 2",sans-serif}
.hoc-h3 .cong{font:600 13px "Quicksand",sans-serif}
.hoc-duoi{display:flex;justify-content:space-between;gap:10px;margin:28px 0 8px;flex-wrap:wrap}
.hoc-duoi .nut{text-decoration:none;padding:10px 18px}
.nut.nho{padding:6px 12px;font-size:13px}
.an{display:none!important}

/* 0. mở bài */
.mo-bai{display:grid;gap:18px}
@media(min-width:760px){.mo-bai{grid-template-columns:1.05fr 1fr;align-items:start}}
.mo-tranh{position:relative;border-radius:18px;overflow:hidden;aspect-ratio:16/10;background:#e9eee7}
.mo-tranh>img:first-child{width:100%;height:100%;object-fit:cover}
.mo-nv{position:absolute;bottom:0;height:88%;width:auto}
.m1-0{left:50%;transform:translateX(-50%)} .m2-0{left:4%} .m2-1{right:4%} .m3-0{left:0} .m3-1{left:50%;transform:translateX(-50%)} .m3-2{right:0}
.mo-so{font:700 13px "Quicksand";color:var(--xanh,#2f8f5b)}
.mo-noi h1{margin:4px 0;font:800 26px/1.2 "Baloo 2",sans-serif}
.mo-ja{font-size:17px;margin-bottom:10px}
.mo-bc{line-height:1.6}
.mo-mt li{margin:4px 0;line-height:1.5}
.mo-9{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0 18px}
.mo-9 span{padding:4px 10px;border-radius:99px;background:#eef2ec;font-size:12.5px;font-weight:600}
.mo-9 span.xong{background:#dcf1e3;color:#1d6b40}
.mo-noi .nut-chinh{display:inline-block;text-decoration:none;padding:12px 26px;font-size:16px}

/* 1. hội thoại */
.hoi-3{display:grid;gap:10px}
@media(min-width:640px){.hoi-3{grid-template-columns:repeat(3,1fr)}}
.o3{text-align:left;padding:14px 16px;border-radius:14px;border:2px solid var(--vien,#dfe6dc);background:var(--the,#fff);cursor:pointer;font-family:inherit;color:inherit}
.o3:hover:not([disabled]){border-color:var(--cam,#f26b1d)}
.o3[disabled]{opacity:.55;cursor:not-allowed}
.o3 b{display:block;font:800 17px "Baloo 2",sans-serif;margin-bottom:3px}
.o3 span{font-size:13.5px;color:#5c675f}
.tb-hoc{display:grid;gap:2px;background:var(--the,#fff);border-radius:14px;padding:8px 10px;border:1px solid var(--vien,#dfe6dc)}
.tb-dong{display:grid;grid-template-columns:76px 1fr 30px;gap:8px;align-items:start;padding:8px 2px;border-bottom:1px dashed #e6ebe4}
.tb-dong:last-child{border-bottom:0}
.tb-dong b{font-size:13px;color:var(--xanh,#2f8f5b);padding-top:3px}
.tb-dong .jp{font-size:16.5px;line-height:1.9}
.tb-dong small{display:block;color:#5c675f;font-size:13.5px;line-height:1.45}
.tb-dan{color:#6d776f;font-size:14px;padding:6px 2px}
.nghe-nho{width:30px;height:30px;border-radius:50%;border:2px solid var(--vien,#dfe6dc);background:#fff;cursor:pointer;font-size:12px;color:var(--navy,#0f3d3e);flex:0 0 auto}
.nghe-nho:hover{border-color:var(--cam,#f26b1d)}
@media(max-width:480px){.tb-dong{grid-template-columns:1fr 30px}.tb-dong b{grid-column:1/-1;padding:0}}

/* 2. ghi chú mẫu câu */
.cm-chu{font-size:13px;color:#5c675f;margin:-4px 0 12px;line-height:2}
.lv{display:inline-block;padding:1px 8px;border-radius:5px;font-size:12px;font-weight:700}
.lv1{background:#e7ecf8;color:#2b4a8b}.lv2{background:#e3f3e8;color:#226b3c}.lv3{background:#fdf0e1;color:#9a5a12}
.cm{background:var(--the,#fff);border:1px solid var(--vien,#dfe6dc);border-radius:14px;padding:12px 14px;margin-bottom:10px}
.cm-dau{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.cm-so{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--navy,#0f3d3e);color:#fff;font-size:12px;font-weight:700}
.cm-dau b{font-size:17px}
.cm p{margin:6px 0;line-height:1.55;font-size:14.5px}
.cm-cau{display:flex;gap:8px;align-items:center;background:#f6f8f5;border-radius:10px;padding:6px 8px;font-size:15.5px;line-height:1.9}
.cm-cau .gc{background:linear-gradient(transparent 62%,#ffe08a 62%)}
.cm-ket{text-align:center;margin-top:14px}

/* 3. thẻ lật */
.the-dem{font-size:13px;color:#5c675f;margin-bottom:8px}
.the-lat{position:relative;min-height:260px;perspective:1200px}
.the-lat>div{position:absolute;inset:0;border-radius:18px;padding:22px 18px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;backface-visibility:hidden;transition:transform .45s;background:var(--the,#fff);border:2px solid var(--vien,#dfe6dc)}
.the-lat .mat-sau{transform:rotateY(180deg);background:#fffaf2}
.the-lat.lat .mat-truoc{transform:rotateY(-180deg)}
.the-lat.lat .mat-sau{transform:rotateY(0)}
.the-lat.da-thuoc>div{border-color:#9ad3ae}
.the-lat small{color:#7a857d;font-weight:700;font-size:12px;letter-spacing:.05em}
.the-vi{font:700 19px/1.45 "Quicksand",sans-serif;max-width:560px}
.the-ja{font-size:21px;line-height:2}
.the-2{display:flex;gap:10px}
.the-noi{width:100%;max-width:560px}
.the-cham{display:flex;gap:6px;justify-content:center;margin-top:12px;flex-wrap:wrap}
.the-cham button{width:34px;height:34px;border-radius:50%;border:2px solid var(--vien,#dfe6dc);background:#fff;font-weight:700;cursor:pointer}
.the-cham button.xong{background:#dcf1e3;border-color:#9ad3ae}
.the-cham button.chon{border-color:var(--cam,#f26b1d)}
.the-lat:has(.noi-kq){min-height:400px}

/* 4. từ vựng */
.tv-ds{display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.tv-o{display:flex;align-items:center;gap:8px;background:var(--the,#fff);border:1px solid var(--vien,#dfe6dc);border-radius:12px;padding:8px 10px}
.tv-o .jp{font-size:17px;line-height:1.9}
.tv-o small{flex:1;color:#5c675f;font-size:13.5px}
.tvq{background:var(--the,#fff);border:2px solid var(--vien,#dfe6dc);border-radius:16px;padding:16px;display:grid;gap:8px}
.tvq-so{font-size:12px;color:#7a857d;font-weight:700}
.tvq-ja{font-size:24px;text-align:center;line-height:2;margin-bottom:4px}
.tvq .lc,.ket+.nut{text-align:left}
.lc.dung{border-color:#2f8f5b!important;background:#e3f3e8!important}
.lc.sai{border-color:#d0453a!important;background:#fbe6e3!important}

/* 5. luyện nói */
.lm2{background:var(--the,#fff);border:1px solid var(--vien,#dfe6dc);border-radius:16px;padding:14px;margin-bottom:14px}
.lm2-mau{display:flex;gap:8px;align-items:center;font-size:18px;font-weight:700}
.lm2-so{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--xanh,#2f8f5b);color:#fff;font-size:13px;flex:0 0 auto}
.lm2-y{margin:6px 0 10px;color:#5c675f;font-size:14px}
.lm2-vd{background:#f6f8f5;border-radius:10px;padding:8px 10px;font-size:14.5px;line-height:1.8;margin-bottom:8px}
.lm2-vd>b{background:var(--navy,#0f3d3e);color:#fff;border-radius:5px;padding:0 6px;font-size:12px}
.lm2-th{border-top:1px dashed #e3e8e1;padding:10px 0 4px}
.lm2-de{font-size:15px;line-height:1.5}
.lm2-de>b{color:var(--xanh,#2f8f5b);margin-right:4px}
.gy{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0}
.gy i{font-style:normal;padding:2px 10px;border-radius:7px;border:1.5px solid #c7d6c4;font-size:15px;line-height:1.8;background:#fbfdfb}
.lm2-cu{display:inline-block;margin-top:4px;font-size:12px;color:#226b3c;background:#e3f3e8;border-radius:5px;padding:1px 8px}
.lm2-mic{margin:6px 0}
.lm2-dap{margin-top:6px;font-size:16px;line-height:1.9;background:#fffaf2;border-radius:10px;padding:6px 10px}

/* luyện nói: micro + kết quả (noi.js) */
.noi-hang{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.noi-mic{background:#fff;border-color:var(--cam,#f26b1d);color:var(--cam,#f26b1d);padding:8px 16px}
.noi-mic.dang{background:#d0453a;border-color:#d0453a;color:#fff;animation:nhip 1s infinite}
@keyframes nhip{50%{box-shadow:0 0 0 8px rgba(208,69,58,.15)}}
.noi-tt{font-size:14px;color:#5c675f}
.noi-kq{display:flex;gap:12px;align-items:flex-start;margin-top:10px;padding:10px;border-radius:12px;background:#f6f8f5;text-align:left}
.noi-diem{flex:0 0 auto;width:62px;height:62px;border-radius:14px;display:grid;place-items:center;align-content:center;font:800 24px/1 "Baloo 2",sans-serif;color:#fff}
.noi-diem small{font:600 10px "Quicksand"}
.noi-diem.d3{background:#2f8f5b}.noi-diem.d2{background:#e0a21b}.noi-diem.d1{background:#d0453a}
.noi-nx{font-weight:700;margin-bottom:2px}
.noi-ban{font-size:13.5px;color:#5c675f}
.noi-am{font-size:17px;letter-spacing:.04em;line-height:1.8;word-break:break-all;margin-top:4px}
.am-ok{color:#2f8f5b}.am-sai{color:#d0453a;text-decoration:underline}.am-thieu{color:#a7afa9;text-decoration:line-through}.am-thua{color:#e07b12}
.noi-chu{font-size:11.5px;color:#7a857d}
.noi-ky{margin-top:6px}

/* 7. kiến thức */
.cot2{position:relative;background:var(--the,#fff);border:1px solid var(--vien,#dfe6dc);border-radius:18px;padding:16px}
.cot2 h3{margin:0 0 12px;padding-right:70px;font:800 19px "Baloo 2",sans-serif}
.cot2-mori{position:absolute;right:12px;top:-14px;width:64px}
.cot2-o{display:grid;gap:10px}
@media(min-width:640px){.cot2-o{grid-template-columns:1fr 1fr}}
.cot2-o .o{background:#f6f8f5;border-radius:12px;padding:10px 12px}
.cot2-o h4{margin:0 0 6px;color:var(--xanh,#2f8f5b);font-size:15px}
.cot2-o ul{margin:0;padding-left:18px}
.cot2-o li{margin:3px 0;line-height:1.55;font-size:14.5px}
.cot2-meo{margin-top:12px;padding:10px 12px;border-radius:12px;background:#fff6ef;border:1.5px solid #f6c8a6;line-height:1.55}
.cot2-meo b{color:var(--cam,#f26b1d);margin-right:4px}

/* 8. BJT */
.che-thi{display:inline-flex;margin:0 0 10px;font-size:14px}

/* tài khoản */
.nut-tk{margin-left:8px;flex:0 0 auto;border:2px solid var(--cam,#f26b1d);background:#fff;color:var(--cam,#f26b1d);border-radius:99px;padding:5px 12px;font:700 13px "Quicksand";cursor:pointer;max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hop-tk{position:fixed;inset:0;z-index:50;background:rgba(15,30,25,.45);display:grid;place-items:center;padding:16px}
.tk-the{position:relative;width:100%;max-width:380px;background:#fff;border-radius:18px;padding:20px}
.tk-the h3{margin:0 0 12px;font:800 20px "Baloo 2",sans-serif}
.tk-dong{position:absolute;right:10px;top:10px;border:0;background:none;font-size:18px;cursor:pointer}
.tk-tab{display:flex;gap:6px;margin-bottom:10px}
.tk-tab button{flex:1;padding:8px;border-radius:10px;border:2px solid var(--vien,#dfe6dc);background:#fff;font-weight:700;cursor:pointer}
.tk-tab button.chon{border-color:var(--cam,#f26b1d);color:var(--cam,#f26b1d)}
.tk-noi input{display:block;width:100%;box-sizing:border-box;margin:0 0 8px;padding:11px 12px;border-radius:10px;border:2px solid var(--vien,#dfe6dc);font-size:16px}
.tk-noi .nut-chinh{width:100%;padding:11px}
.tk-loi{color:#d0453a;font-size:13.5px;min-height:18px;margin-bottom:6px}

@media(max-width:520px){.dau-nav .nhan-thu,.logo-ten small{display:none}.dau-nav a{padding:5px 9px;font-size:13px}.logo-ten{font-size:16px}.nut-tk{margin-left:4px;padding:4px 10px;font-size:12px;max-width:96px}}
.hoc-noi{overflow-wrap:anywhere}
.ds-cau{background:var(--the,#fff);border:1px solid var(--vien,#dfe6dc);border-radius:14px;padding:10px 14px;margin-bottom:10px}
.ds-cau p{margin:0 0 8px;line-height:1.55}
.ds-nut{display:flex;gap:8px}.ds-nut .lc{flex:1;text-align:center}
.ds-giai{margin-top:8px;font-size:14px;line-height:1.55;background:#f6f8f5;border-radius:10px;padding:8px 10px}
.che-thi{color:#24312a!important}
@media(max-width:420px){.logo-ten{display:none}}