/* Đăng ký lớp đào tạo, Lớp học của tôi, quản trị đơn học (RV-891). Dùng chung biến màu của style.css và lớp tk- của tai-khoan.css. */
.dt-hero{background:#0E1C30;color:#FAF9F7;padding:28px 0 30px}
.dt-hero .wrap{display:grid;gap:10px}
.dt-hero .dt-eb{margin:0;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:#C9A24B;font-weight:700}
.dt-hero h1,.dt-hero h2{margin:0;font-size:clamp(30px,6vw,46px);line-height:1.12}
.dt-hero h1 em,.dt-hero h2 em{font-style:normal;color:#E2C27A}
.dt-hero p{margin:0;max-width:720px}
.dt-hero .dt-sub{color:#D9DEE7}
.dt-chang{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0 0;padding:0;list-style:none}
.dt-chang li{border:1px solid rgba(201,162,75,.55);border-radius:8px;padding:12px 14px;background:rgba(255,255,255,.04)}
.dt-chang b{display:block;color:#E2C27A;font-size:14px}
.dt-chang span{display:block;font-weight:700;margin:2px 0}
.dt-chang small{display:block;color:#C9CFDA;font-size:14px;line-height:1.45}
.dt-hero .dt-fact{font-size:13px;color:#AEB6C4}
.dt-page{display:grid;gap:18px;padding:22px 0 40px;max-width:860px}
.dt-page .tk-card{margin:0}
.dt-form label{display:block;margin:14px 0 6px;font-weight:700}
.dt-form input[type="text"],.dt-form input[type="tel"],.dt-form textarea,.dt-qt-form input,.dt-lop-sua input,.dt-lop-sua select,[data-qt-loc]{width:100%;font:inherit;font-size:17px;padding:11px 14px;border:2px solid var(--ink);border-radius:var(--rb);background:#fff;color:var(--ink)}
[data-qt-loc]{width:auto;font-size:15px;padding:6px 10px}
.dt-form .dt-ck{display:flex;gap:10px;align-items:flex-start;font-weight:400;margin-top:18px}
.dt-form .dt-ck input{flex:none;width:22px;height:22px;margin:2px 0 0;accent-color:var(--accent)}
.dt-gia{display:flex;align-items:baseline;gap:10px;margin:8px 0 4px;padding:10px 14px;background:var(--soft);border-radius:var(--rb)}
.dt-gia strong{font-size:24px}
.dt-lop-dl{display:grid;grid-template-columns:max-content 1fr;gap:4px 14px;margin:8px 0}
.dt-lop-dl dt{color:var(--muted);font-size:15px}
.dt-lop-dl dd{margin:0}
.dt-don h3{margin:6px 0 4px;font-size:22px}
.dt-don-top{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0}
.dt-ma{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.06em}
.dt-tt{display:inline-block;padding:2px 10px;border-radius:999px;font-size:13.5px;font-weight:700;background:var(--soft);color:var(--ink)}
.dt-tt-cho-thanh-toan{background:#FFF4D6;color:#6B4A00}
.dt-tt-cho-doi-soat{background:#E6ECFF;color:#1733C9}
.dt-tt-da-thanh-toan{background:#DDF5E4;color:#0B5A27}
.dt-tt-can-kiem{background:#FFE3E0;color:#8A1C12}
.dt-tt-da-huy{background:#ECEEF2;color:#5B626F}
.dt-tt-d{margin:6px 0 0;color:var(--ink)}
.dt-pay{margin:16px 0 4px;padding:16px;border:2px solid var(--ink);border-radius:8px;background:#fff}
.dt-pay h3{margin:0 0 10px;font-size:19px}
.dt-pay-in{display:grid;grid-template-columns:minmax(0,240px) 1fr;gap:18px;align-items:start}
.dt-qr-img{background:#fff;border:1px solid var(--line);border-radius:6px;padding:6px;max-width:240px}
.dt-qr-img svg{display:block;width:100%;height:auto}
.dt-bank{display:grid;grid-template-columns:max-content 1fr;gap:6px 12px;margin:0}
.dt-bank dt{color:var(--muted);font-size:15px;padding-top:3px}
.dt-bank dd{margin:0;overflow-wrap:anywhere}
.dt-big{font-size:19px}
.dt-ttin{margin-top:12px}
.dt-ttin summary{cursor:pointer;font-weight:700;min-height:36px}
.dt-xong{display:grid;gap:14px}
.dt-xong-dau h2{margin:6px 0}
.dt-bang-cuon{overflow-x:auto}
.dt-bang{width:100%;border-collapse:collapse;font-size:15px}
.dt-bang th,.dt-bang td{border-top:1px solid var(--line);padding:10px 8px;text-align:left;vertical-align:top}
.dt-bang th{font-size:14px;color:var(--muted)}
.dt-qt-act{min-width:160px}
.dt-qt-act .tk-link{display:block}
.dt-qt-form label{display:block;margin:8px 0 4px;font-weight:600;font-size:15px}
.dt-lop-sua label{display:block;margin:10px 0 4px;font-weight:700}
@media (max-width:640px){
  .dt-chang{grid-template-columns:1fr}
  .dt-pay-in{grid-template-columns:1fr}
  .dt-qr-img{max-width:260px;margin-inline:auto}
  .dt-lop-dl,.dt-bank{grid-template-columns:1fr;gap:0 0}
  .dt-lop-dl dd,.dt-bank dd{margin-bottom:8px}
  .dt-bang thead{display:none}
  .dt-bang,.dt-bang tbody,.dt-bang tr,.dt-bang td{display:block;width:100%}
  .dt-bang tr{border-top:2px solid var(--ink);padding:6px 0}
  .dt-bang td{border:0;padding:4px 0}
}
.dt-hero a{color:#E2C27A}

/* RV-902: trang đăng ký đặt form/đơn lên đầu, phần giới thiệu lớp xuống dưới */
.dt-top{background:#0E1C30;color:#FAF9F7;padding:18px 0 16px}
.dt-top .wrap{display:grid;gap:4px}
.dt-top .dt-eb{margin:0;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:#C9A24B;font-weight:700}
.dt-top h1{margin:0;font-size:clamp(24px,4.6vw,34px);line-height:1.18}
.dt-top h1 em{font-style:normal;color:#E2C27A}
.dt-top .dt-sub{margin:0;font-size:15px}
.dt-top a{color:#E2C27A}
.dt-hero{scroll-margin-top:64px}
.dt-thieu{border-left:4px solid #E2A33A;background:#FFF7E8}
.dt-thieu h2{margin:4px 0 6px}
.dt-thieu-d{border-left:4px solid #E2A33A;background:#FFF7E8;padding:8px 12px;border-radius:4px}

/* RV-903: khối thông tin lớp dạng vé */
.dt-ve{display:grid;grid-template-columns:auto 1fr;border:1px solid #E3E6EC;border-radius:12px;overflow:hidden;margin:10px 0 14px;background:#fff}
.dt-ve-ngay{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:14px 18px;background:#0E1C30;color:#FAF9F7;min-width:118px;text-align:center}
.dt-ve-ngay span{font-size:13px;letter-spacing:.06em;color:#C9CFDA}
.dt-ve-ngay strong{font-size:34px;line-height:1;color:#E2C27A;font-weight:800}
.dt-ve-ngay .dt-ve-cho{font-size:16px}
.dt-ve-tt{padding:12px 16px;display:grid;gap:8px;align-content:center}
.dt-ve-tt p{margin:0}
.dt-ve-lop{font-weight:800;font-size:18px}
.dt-ve-row{display:flex;gap:10px;align-items:flex-start;line-height:1.45}
.dt-ve-row svg{flex:0 0 20px;width:20px;height:20px;margin-top:2px;color:#2448FF}
.dt-ve-dc{color:var(--muted);font-size:15px}
.dt-ve-map{font-size:14px}
.dt-ve-gia{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px;padding:12px 16px;background:#FFF7E8;border-top:1px dashed #E2C27A}
.dt-ve-gia span{color:var(--muted)}
.dt-ve-gia strong{font-size:26px;font-weight:800}
.dt-ve-gia small{color:var(--muted);font-size:14px}
.dt-nw{white-space:nowrap}
@media (max-width:560px){.dt-ve{grid-template-columns:1fr}.dt-ve-ngay{flex-direction:row;justify-content:flex-start;align-items:baseline;gap:10px;padding:10px 14px;min-width:0}.dt-ve-ngay strong{font-size:26px}.dt-ve-tt{padding:12px 14px}}
.dt-tt-khach-moi{background:#EDE7FF;color:#4B2BB8}
/* RV-907: hình thức học */
.dt-ht{border:0;margin:6px 0 4px;padding:0;display:grid;gap:8px}
.dt-ht legend{font-weight:700;margin-bottom:6px;padding:0}
.dt-ht-o{display:flex;gap:10px;align-items:flex-start;border:1px solid #D7DCE5;border-radius:10px;padding:10px 12px;cursor:pointer;font-weight:400}
.dt-ht-o:has(input:checked){border-color:#2448FF;background:#F3F5FF}
.dt-ht-o input{margin-top:4px}
.dt-ht-o small{display:block;color:var(--muted);font-size:14px}
.dt-tt-online{background:#E3F6FF;color:#05628A;font-size:12px;padding:1px 8px}
.dt-da-luu{color:#137333;font-weight:600;margin-top:4px}
/* RV-911: lớp Zoom riêng */
.dt-tt-cho-lop-zoom{background:#EEF2FF;color:#3730A3}
.dt-zoom-lich{margin:14px 0;padding:10px 12px 12px;border:1px solid var(--line,#e5e7eb);border-radius:8px}
.dt-zoom-lich legend{font-weight:700;padding:0 6px}
/* Học tiếp sau lớp 22/10/2026 */
.dt-loai{margin-bottom:14px}
.dt-hoc-tiep{margin:14px 0 4px;padding:14px 16px;border-radius:12px;background:#F3F5FF;border:1px solid #C9D2FF}
.dt-hoc-tiep p{margin:0 0 8px}
.dt-tai-lieu .tk-actions{display:flex;flex-wrap:wrap;gap:8px}
.dt-tt-cho-duyet{background:#FFF4D6;color:#7A5200}
/* Ủng hộ tuỳ tâm sau mốc 3 (Tim chốt 22/10 19:37): nhẹ, không bắt buộc */
.dt-ung-ho{margin:14px 0 4px;padding:14px 16px;border-radius:12px;background:#FFFBF2;border:1px solid #EAD8A8}
.dt-ung-ho p{margin:0 0 6px}
.dt-ung-ho .dt-gop{margin:0}
.dt-gop > summary{font-weight:700}
.dt-gop .dt-pay{margin-top:10px}
.dt-nhan h2{margin-top:4px}
.dt-nhan-tt{padding:10px 12px;border-radius:10px;background:var(--soft,#F4F6FA)}

/* 22/10/2026: trang đăng ký một cột 860px thẳng hàng; phần "Về lớp" thiết kế lại cho lớp Zoom */
.dt-col{max-width:860px}
.dt-top{padding:30px 0 26px;border-bottom:1px solid rgba(255,255,255,.08)}
.dt-top .wrap{gap:8px}
.dt-top .dt-eb{font-size:12.5px;letter-spacing:.16em;color:#C9A24B}
.dt-top h1{font-size:clamp(28px,5vw,40px);line-height:1.12;font-weight:800;letter-spacing:-.01em}
.dt-top .dt-sub{font-size:16px;line-height:1.55;color:#C9CFDA;max-width:640px}
.dt-top .dt-sub a{color:#E2C27A;text-underline-offset:3px}
.dt-vl{padding:44px 0 52px;border-top:1px solid rgba(255,255,255,.08)}
.dt-vl .wrap{gap:0}
.dt-vl-head{display:grid;gap:10px;margin-bottom:26px}
.dt-vl-head h2{font-size:clamp(28px,5vw,40px);font-weight:800;letter-spacing:-.01em}
.dt-vl-head .dt-sub{font-size:17px;line-height:1.6;max-width:640px}
.dt-vl .dt-chang{margin:0;gap:14px}
.dt-vl .dt-chang li{position:relative;padding:18px 18px 18px;border:1px solid rgba(255,255,255,.12);border-top:3px solid #C9A24B;border-radius:10px;background:rgba(255,255,255,.035)}
.dt-vl .dt-chang b{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:#C9A24B}
.dt-vl .dt-chang span{font-size:18px;margin:6px 0 6px;line-height:1.3}
.dt-vl .dt-chang small{font-size:15px;color:#C9CFDA;line-height:1.5}
.dt-vl-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:14px;margin-top:14px;align-items:stretch}
.dt-gv{display:flex;gap:16px;align-items:flex-start;align-self:start;padding:20px 18px;border:1px solid rgba(255,255,255,.12);border-radius:10px;background:rgba(255,255,255,.035)}
.dt-gv img{flex:0 0 72px;width:72px;height:72px;border-radius:50%;object-fit:cover;border:2px solid #C9A24B}
.dt-gv-k{margin:0;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:#C9A24B;font-weight:700}
.dt-gv h3{margin:4px 0 8px;font-size:21px;line-height:1.2}
.dt-gv h3 a{color:#FAF9F7;text-decoration:none}
.dt-gv h3 a:hover{text-decoration:underline;text-underline-offset:3px}
.dt-gv ul{margin:0;padding:0;list-style:none;display:grid;gap:5px}
.dt-gv li{font-size:15px;line-height:1.45;color:#C9CFDA;padding-left:14px;position:relative}
.dt-gv li::before{content:"";position:absolute;left:0;top:.6em;width:6px;height:6px;border-radius:50%;background:#C9A24B}
.dt-loi{display:grid;gap:14px}
.dt-loi-o{display:grid;gap:8px;padding:18px;border:1px solid rgba(255,255,255,.12);border-radius:10px;background:rgba(255,255,255,.035)}
.dt-loi-o p{margin:0;max-width:none}
.dt-loi-k{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:#C9A24B;font-weight:700}
.dt-loi-t{font-size:18px;font-weight:700;line-height:1.3}
.dt-loi-t b{color:#E2C27A}
.dt-loi-o p:not(.dt-loi-k):not(.dt-loi-t){font-size:15px;line-height:1.5;color:#C9CFDA}
.dt-loi-o .btn{justify-self:start;margin-top:4px}
.btn-ghost-light{background:transparent;color:#FAF9F7;border:1.5px solid rgba(255,255,255,.45)}
.btn-ghost-light:hover{background:rgba(255,255,255,.08)}
@media (max-width:760px){
  .dt-vl{padding:34px 0 40px}
  .dt-vl-grid{grid-template-columns:1fr}
  .dt-vl .dt-chang li{padding:16px}
}
@media (max-width:420px){
  .dt-gv{flex-direction:column}
}

/* Hành trình AI cho mọi người — 5 mốc (22/10/2026) */
.dt-ht{margin:16px 0 4px;padding:16px 16px 14px;border:1px solid #D7DCE5;border-radius:12px;background:linear-gradient(180deg,#FAFBFF 0%,#fff 100%)}
.dt-ht-dau{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.dt-ht-k{margin:0;font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;font-weight:800;color:#1733C9}
.dt-ht-pt{margin:0;display:flex;align-items:baseline;gap:8px}
.dt-ht-pt strong{font-size:26px;font-weight:800;line-height:1}
.dt-ht-pt span{color:var(--muted);font-size:14px}
.dt-ht-bar{height:8px;border-radius:999px;background:#E6EAF2;overflow:hidden}
.dt-ht-bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#2448FF,#6C8CFF);transition:width .4s ease}
.dt-moc-ds{list-style:none;margin:14px 0 0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}
.dt-moc{display:grid;gap:8px;justify-items:center;text-align:center;position:relative}
.dt-moc-dot{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;border:2px solid #C9D0DC;background:#fff;color:var(--muted);font-weight:800;font-size:14px}
.dt-moc-dot svg{width:18px;height:18px}
.dt-moc-xong .dt-moc-dot{border-color:#2448FF;background:#2448FF;color:#fff}
/* Mốc 5 = mốc kết, không phải buổi học: huy hiệu vàng, có nhãn "mốc kết"; khi xong chuyển vàng đậm */
.dt-moc-cuoi .dt-moc-dot{border-style:dashed;border-color:#C9A24B;background:#FFF7E8;color:#9A7A2E}
.dt-moc-cuoi.dt-moc-xong .dt-moc-dot{border-style:solid;border-color:#C9A24B;background:#C9A24B;color:#fff}
.dt-moc-cuoi{padding-left:10px;border-left:1px dashed #E2C27A}
.dt-moc-t b{display:block;font-size:14px;line-height:1.25}
.dt-moc-t b em{display:inline-block;font-style:normal;font-weight:700;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:#9A7A2E;background:#FFF1D6;border-radius:999px;padding:1px 7px;margin-left:4px;vertical-align:middle}
.dt-moc-t small{display:block;color:var(--muted);font-size:12.5px;line-height:1.35;margin-top:2px}
.dt-ht-ghi{margin:12px 0 0}
.dt-lo-trinh{margin:14px 0 0;padding:14px 16px;border-radius:10px;background:#FFF7E8;border:1px solid #E2C27A}
.dt-lo-trinh p{margin:0 0 8px}
.dt-lo-trinh .tk-actions{margin:0}
@media (max-width:640px){
  .dt-moc-ds{grid-template-columns:1fr;gap:8px}
  .dt-moc{grid-template-columns:34px 1fr;justify-items:start;text-align:left;align-items:start;gap:10px}
  .dt-moc-cuoi{padding-left:0;border-left:0;margin-top:6px;padding-top:10px;border-top:1px dashed #E2C27A}
  .dt-moc-t small{font-size:13px}
}
/* Quản trị: cột hành trình */
.dt-qt-chon{display:inline-flex;gap:6px;align-items:center;font-size:14px;margin-bottom:4px}
.dt-qt-moc{display:flex;gap:3px}
.dt-qt-moc i{font-style:normal;display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;border:1.5px solid #C9D0DC;font-size:12px;font-weight:700;color:var(--muted)}
.dt-qt-moc i.xong{background:#2448FF;border-color:#2448FF;color:#fff}
.dt-qt-moc i.ket{border-style:dashed;border-color:#C9A24B;color:#9A7A2E;background:#FFF7E8;margin-left:4px}
.dt-qt-moc i.ket.xong{border-style:solid;background:#C9A24B;border-color:#C9A24B;color:#fff}
.dt-qt-moc i svg{width:12px;height:12px}
.dt-qt-chon{padding:2px 8px;border:1px dashed #C9D0DC;border-radius:6px;cursor:pointer}
.dt-qt-chon:has(input:checked){border-style:solid;border-color:#2448FF;background:#F3F5FF}
.dt-td{border-left:4px solid #2448FF}
.dt-td .tk-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.dt-td input[type="text"]{font:inherit;padding:6px 10px;border:1px solid #C9D0DC;border-radius:6px;min-width:220px}
.dt-dn-truoc{margin:14px 0 4px;padding:18px;border-radius:12px;background:#F3F5FF;border:1px solid #C9D2FF}
.dt-dn-truoc h3{margin:0 0 6px;font-size:19px}
.dt-dn-truoc p{margin:0 0 10px}
.dt-dn-truoc .tk-fine{margin:0}
/* Quản trị: dòng lớp đăng ký dưới tên học viên + tóm tắt theo lớp (Tim 22/10 23:53) */
.dt-qt-lop{display:inline-block;margin-top:2px;font-size:13px;font-weight:600;color:#1733C9}
.dt-qt-nhom{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:baseline}
/* Trang đăng ký riêng /dao-tao/zoom/ và /dao-tao/thuc-hanh/ (Tim 23/10) */
.dt-top .dt-sub-phu{margin-top:8px;font-size:15px;opacity:.92}
.dt-sang-th h2{margin-top:6px}

/* Gợi ý nhu cầu bấm nhanh (23/10) */
.dt-chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 4px}
.dt-chip{font:inherit;font-size:14px;font-weight:600;padding:7px 14px;border-radius:999px;border:1.5px solid #C9D0DC;background:#fff;color:var(--ink);cursor:pointer}
.dt-chip:hover{border-color:#8FA1FF}
.dt-chip.on{border-color:#2448FF;background:#F3F5FF;color:#1733C9}
/* Quản trị: dashboard nhu cầu học viên (23/10) */
.dt-nc-ds{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:10px}
.dt-nc-ds li{display:grid;grid-template-columns:200px 1fr 40px 44px;align-items:center;gap:12px}
.dt-nc-t{font-weight:700;font-size:15px}
.dt-nc-bar{height:12px;border-radius:999px;background:#E6EAF2;overflow:hidden}
.dt-nc-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#2448FF,#6C8CFF)}
.dt-nc-ds b{font-size:18px;text-align:right}
.dt-nc-ds small{color:var(--muted)}
.dt-nc-nhan{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 0}
.dt-nc-nhan span{padding:5px 12px;border-radius:999px;background:#F2F4F7;font-size:14px}
.dt-nc-nhan b{color:#1733C9}
.dt-nc-raw li{font-size:14px;line-height:1.45}
@media (max-width:640px){.dt-nc-ds li{grid-template-columns:1fr 36px 44px}.dt-nc-t{grid-column:1/-1}}

/* Quản trị: bố cục 2 cột, menu trái dính, dùng hết chiều ngang (Tim 23/10 17:06) */
main:has([data-dt-trang="quan-tri"]) .wrap{--wrap:1480px}
.tk-page:has([data-dt-trang="quan-tri"]),[data-dt-trang="quan-tri"].tk-page{max-width:none}
.dt-qt-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:22px;align-items:start}
.dt-qt-main{display:grid;gap:18px;min-width:0}
.dt-qt-menu{position:sticky;top:84px;background:#fff;border:1px solid #D7DCE5;border-radius:12px;padding:14px 10px}
.dt-qt-menu-k{margin:0 8px 8px;font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:800;color:#1733C9}
.dt-qt-menu ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.dt-qt-menu a{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:9px 10px;border-radius:8px;text-decoration:none;color:var(--ink);font-weight:600;font-size:15px}
.dt-qt-menu a span{font-size:12.5px;color:var(--muted);font-weight:600;white-space:nowrap}
.dt-qt-menu a em{font-style:normal;color:#B45309}
.dt-qt-menu a:hover{background:#F2F4F7}
.dt-qt-menu a.on{background:#EEF1FF;color:#1733C9}
.dt-qt-menu-act{margin:10px 8px 0;display:flex;gap:12px;flex-wrap:wrap;padding-top:10px;border-top:1px solid #E6EAF2}
.dt-lop-chi-tiet{border:1px solid #D7DCE5;border-radius:10px;padding:10px 14px;margin-top:10px}
.dt-lop-chi-tiet>summary{cursor:pointer;font-size:16px;padding:4px 0}
.dt-lop-chi-tiet .dt-lop-sua{margin-top:8px}
.dt-qt-main section[id]{scroll-margin-top:90px}
@media (max-width:900px){
  .dt-qt-layout{grid-template-columns:1fr}
  .dt-qt-menu{position:sticky;top:60px;z-index:5;padding:8px;border-radius:10px}
  .dt-qt-menu-k,.dt-qt-menu-act{display:none}
  .dt-qt-menu ul{display:flex;overflow-x:auto;gap:6px;padding-bottom:2px}
  .dt-qt-menu a{white-space:nowrap;padding:7px 10px;font-size:14px}
  .dt-qt-menu a span{display:none}
}
.dt-qt-layout,.dt-qt-layout>*,[data-dt-trang="quan-tri"] .dt-page{min-width:0;max-width:100%}
.dt-qt-layout{grid-template-columns:220px minmax(0,1fr)}
@media (max-width:900px){.dt-qt-layout{grid-template-columns:minmax(0,1fr)}}
[data-dt-trang="quan-tri"] select,[data-dt-trang="quan-tri"] input[type="text"]{max-width:100%;box-sizing:border-box}
@media (max-width:900px){[data-dt-trang="quan-tri"] select{max-width:calc(100vw - 80px)}[data-dt-trang="quan-tri"] .dt-td input[type="text"]{min-width:0;width:100%}}
/* Tổng quan dạng ô số (23/10 22:53) */
.dt-tq h2{margin:0}
.dt-tq-dau{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin:0 0 16px}
.dt-tq-act{margin:0;display:flex;gap:14px}
.dt-tq-hero{display:grid;grid-template-columns:1fr 1.35fr 1fr;gap:12px}
.dt-tq-so{border:1px solid #D7DCE5;border-radius:12px;padding:16px 18px;background:#F8F9FC;display:flex;flex-direction:column;gap:2px;min-width:0}
.dt-tq-so span{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.dt-tq-so b{font-size:34px;line-height:1.15;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.dt-tq-so small{font-size:13.5px;color:var(--muted);line-height:1.4}
.dt-tq-so.can{background:#FFF7E8;border-color:#F3C77A}.dt-tq-so.can b{color:#B45309}
.dt-tq-so.xong{background:#F0FAF3;border-color:#BFE3CB}.dt-tq-so.xong b{color:#15803D}
.dt-tq-k{margin:20px 0 8px;font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#1733C9}
.dt-tq-k small{font-weight:600;letter-spacing:0;text-transform:none;color:var(--muted);font-size:13px}
.dt-tq-o{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}
.dt-qo{font:inherit;text-align:left;border:1px solid #D7DCE5;background:#fff;border-radius:10px;padding:10px 12px;display:flex;flex-direction:column;gap:2px;cursor:pointer;transition:border-color var(--motion),background var(--motion)}
.dt-qo b{font-size:24px;line-height:1.1;font-weight:800;font-variant-numeric:tabular-nums}
.dt-qo span{font-size:13.5px;color:var(--muted);line-height:1.3}
.dt-qo.rong b{color:#A0A7B4}
.dt-qo.can{border-color:#F3C77A;background:#FFF7E8}.dt-qo.can b{color:#B45309}.dt-qo.can span{color:#7A3E06}
.dt-qo:hover{border-color:#2448FF}
.dt-qo.on{border-color:#2448FF;box-shadow:inset 0 0 0 1px #2448FF;background:#EEF2FF}
.dt-qo:focus-visible,.dt-ql:focus-visible{outline:2px solid #2448FF;outline-offset:2px}
.dt-tq-lop{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.dt-ql{font:inherit;text-align:left;border:1px solid #D7DCE5;background:#fff;border-left:4px solid #2448FF;border-radius:10px;padding:12px 14px;display:flex;flex-direction:column;gap:3px;cursor:pointer;min-width:0;transition:border-color var(--motion),background var(--motion)}
.dt-ql-t{font-weight:700;font-size:15px;line-height:1.35;color:var(--ink)}
.dt-ql-p{font-size:13.5px;color:var(--muted)}
.dt-ql-s{margin-top:4px;font-size:14px;color:var(--muted)}
.dt-ql-s b{font-size:20px;color:var(--ink);font-variant-numeric:tabular-nums}
.dt-ql-s em{font-style:normal;color:#B45309;font-weight:700}
.dt-ql:hover{background:#F8F9FC}
.dt-ql.on{background:#EEF2FF;border-color:#2448FF}
.dt-tq-loc{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:flex-end;margin:20px 0 0;padding:14px;border-radius:10px;background:#F2F4F7}
.dt-tq-loc label{display:flex;flex-direction:column;gap:4px;flex:1 1 240px;min-width:0;margin:0}
.dt-tq-loc label span{font-size:13px;font-weight:700;color:var(--muted)}
.dt-tq-loc select{width:100%;max-width:100%;font:inherit;font-size:15px;padding:9px 34px 9px 12px;border:1px solid #C9CFDA;border-radius:8px;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%235B626F' stroke-width='1.8'/%3E%3C/svg%3E") no-repeat right 12px center;-webkit-appearance:none;appearance:none;color:var(--ink)}
.dt-tq-bo{margin-bottom:10px}
.dt-tq-ghi{margin:12px 0 0}
@media (max-width:1100px){.dt-tq-o{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:760px){.dt-tq-hero{grid-template-columns:1fr}.dt-tq-o{grid-template-columns:repeat(2,minmax(0,1fr))}.dt-tq-so b{font-size:28px}}
@media (max-width:760px){.dt-tq-hero{grid-template-columns:1fr 1fr}.dt-tq-so{padding:12px 14px}.dt-tq-so:nth-child(2){grid-column:1/-1;order:3}.dt-tq-so span{font-size:11.5px}.dt-tq-so small{font-size:12.5px}.dt-tq-so.can small,.dt-tq-so.xong small{display:none}}
/* Thông tin lớp dạng lưới thẻ (24/10 13:37) */
.dt-lt{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px;align-items:start}
.dt-lt-the{border:1px solid #D7DCE5;border-radius:12px;background:#fff;min-width:0;overflow:hidden}
.dt-lt-the.mo{border-top:4px solid #2448FF}
.dt-lt-the>summary{list-style:none;cursor:pointer;padding:14px 16px;display:flex;flex-direction:column;gap:6px;background:#F8F9FC;border-bottom:1px solid transparent}
.dt-lt-the>summary::-webkit-details-marker{display:none}
.dt-lt-the[open]>summary{border-bottom-color:#E6EAF2}
.dt-lt-the>summary::after{content:"Bấm để mở";font-size:12.5px;color:#1733C9;font-weight:600}
.dt-lt-the[open]>summary::after{content:none}
.dt-lt-ten{font-weight:800;font-size:16px;line-height:1.35;color:var(--ink)}
.dt-lt-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;font-size:13.5px;color:var(--muted)}
.dt-lt-pill{font-style:normal;font-size:12px;font-weight:700;padding:2px 9px;border-radius:999px}
.dt-lt-pill.mo{background:#E7F6EC;color:#15803D}.dt-lt-pill.tam{background:#FFF1DB;color:#B45309}.dt-lt-pill.dong{background:#EEF0F3;color:#5B626F}
.dt-lt .dt-lop-sua{padding:4px 16px 16px;margin:0}
.dt-lt-nhom{padding:12px 0;border-bottom:1px dashed #E2E6EE}
.dt-lt-k{margin:0 0 6px;font-size:12.5px;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:#1733C9}
.dt-lt-k small{display:block;margin-top:2px;font-weight:500;letter-spacing:0;text-transform:none;color:var(--muted);font-size:12.5px;line-height:1.35}
.dt-lt-2{display:grid;grid-template-columns:1.25fr 1fr;gap:8px}
.dt-lt-o{margin:0 0 8px;min-width:0}
.dt-lt .dt-lop-sua label{margin:0 0 3px;font-size:13px;font-weight:700;color:#3A404B;display:flex;align-items:center;gap:6px}
.dt-lt .dt-lop-sua input,.dt-lt .dt-lop-sua select{font-size:14.5px;padding:8px 10px;border:1px solid #C9CFDA;border-radius:8px;min-width:0}
.dt-lt .dt-lop-sua input:focus,.dt-lt .dt-lop-sua select:focus{outline:2px solid #2448FF;outline-offset:0;border-color:#2448FF}
.dt-lt-ok{display:inline-grid;place-items:center;width:16px;height:16px;border-radius:50%;background:#15803D;color:#fff;font-size:10px;line-height:1}
.dt-lt-chan{display:flex;align-items:flex-end;gap:10px;padding-top:12px}
.dt-lt .dt-lop-sua .dt-lt-tt{flex:1;display:flex;flex-direction:column;align-items:stretch;gap:3px;margin:0}
.dt-lt-tt span{font-size:13px;font-weight:700;color:#3A404B}
.dt-lt-chan .btn{padding:9px 22px;white-space:nowrap}
.dt-lt-ghi{margin:8px 0 0;font-size:12.5px}
.dt-lt .tk-note{margin:10px 0 0}
@media (max-width:560px){.dt-lt{grid-template-columns:minmax(0,1fr)}}
/* RV-1023 (24/10/2026): Lớp của tôi + Khám phá lớp học; trang chương trình; quan tâm chuyên đề */
.dt-tt-khao-sat{background:#FFF4D6;color:#8A5A00}
.dt-lct>h2,.dt-kp-dau h2{font-size:22px;margin:0 0 12px}
.dt-lct{margin:0 0 28px}
.dt-kp{margin:8px 0 0;padding-top:22px;border-top:1px solid #E3E7EE}
.dt-kp-dau{margin:0 0 14px}
.dt-kp-dau .tk-fine{margin:0;max-width:62ch}
.dt-kp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.dt-kp-o{border:1px solid #D7DCE5;border-radius:12px;background:#fff;padding:16px 18px;display:flex;flex-direction:column;gap:8px;min-width:0}
.dt-kp-cd{border-top:4px solid #F2B705}
.dt-kp-o:not(.dt-kp-cd){border-top:4px solid #2448FF}
.dt-kp-k{margin:0;font-size:12.5px;font-weight:700;letter-spacing:.02em;text-transform:uppercase;color:var(--muted)}
.dt-kp-o h3{margin:0;font-size:17px;line-height:1.3}
.dt-kp-o h3 a{color:var(--ink);text-decoration:none}
.dt-kp-o h3 a:hover{text-decoration:underline}
.dt-kp-tt{margin:0}
.dt-kp-mt{margin:0;font-size:14.5px;color:#2B3140}
.dt-kp-o .tk-fine{margin:0}
.dt-kp-o .tk-actions{margin:auto 0 0;padding-top:6px}
.dt-ct-tt{margin:0 0 10px;display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center}
.dt-ct-tt .tk-fine{margin:0}
.dt-md .dt-ht-o{padding:8px 12px}
.dt-qt-form-nguoi textarea{width:100%;box-sizing:border-box}
.dt-ql-tinh{cursor:default}
.dt-qtam .dt-tq-lop{margin:0 0 14px}
@media (max-width:420px){.dt-kp-grid{grid-template-columns:1fr}.dt-kp-o{padding:14px}.dt-kp-o .btn{width:100%;text-align:center;box-sizing:border-box}}

/* ---------- Lớp học của tôi, bố cục gọn (Tim chốt 24/10/2026) ---------- */
.dtl{display:grid;grid-template-columns:minmax(0,1fr) 280px;grid-template-areas:"ht phu" "ds phu";gap:16px 20px;align-items:start}
.dtl.dtl-khong-ht{grid-template-areas:"ds phu"}
.dtl-ht{grid-area:ht;margin:0}
.dtl-phu{grid-area:phu;display:grid;gap:12px;position:sticky;top:72px}
.dtl-ds{grid-area:ds;display:grid;gap:12px;min-width:0}
.dtl .tk-card{margin:0}
.dtl-ht-goi{margin:10px 0 0}
.dtl-moc-ds{margin-top:10px;gap:6px}
.dtl-moc-b{all:unset;box-sizing:border-box;display:grid;gap:6px;justify-items:center;width:100%;padding:8px 4px;border-radius:10px;cursor:pointer;border:1.5px solid transparent;text-align:center}
.dtl-moc-b:hover{background:#F3F5FF}
.dtl-moc-b:focus-visible{outline:3px solid #2448FF;outline-offset:2px}
.dtl-moc-b[aria-pressed="true"]{background:#EEF1FF;border-color:#2448FF}
.dtl-moc-b .dt-moc-t small{font-size:12px}
.dtl-ht .dt-moc-cuoi{padding-left:6px}
.dtl-pan{margin-top:10px;padding:12px 14px;border-radius:10px;background:#F7F8FC;border:1px solid #E3E6EC}
.dtl-pan:empty{display:none}
.dtl-pan p{margin:0 0 6px}
.dtl-pan .tk-actions{margin:8px 0 0}
.dtl-pan-d{color:var(--ink)}
.dtl-h{font-size:17px;margin:4px 0 0}
.dtl-nhom>summary{cursor:pointer;font-weight:800;font-size:17px;min-height:36px;margin:4px 0 8px}
.dtl-nhom{display:grid;gap:12px}
.dtl-nhom[open]{gap:12px}
.dtl-don{padding:14px 16px;transition:box-shadow .2s,border-color .2s}
.dtl-don.dtl-chon{border-color:#2448FF;box-shadow:0 0 0 2px #2448FF inset}
.dtl-don.dtl-nhay{box-shadow:0 0 0 4px rgba(36,72,255,.35)}
.dtl-dau{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:center}
.dtl-ngay{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:72px;padding:8px 10px;border-radius:10px;background:#0E1C30;color:#FAF9F7;text-align:center}
.dtl-ngay span{font-size:11.5px;color:#C9CFDA;line-height:1.2}
.dtl-ngay strong{font-size:22px;line-height:1.1;color:#E2C27A;font-weight:800}
.dtl-ngay .dtl-cho{font-size:14px}
.dtl-tt{min-width:0}
.dtl-ten{margin:0;display:flex;flex-wrap:wrap;gap:6px 8px;align-items:center;font-weight:800;font-size:16.5px;line-height:1.3}
.dtl-meta{margin:6px 0 0;display:flex;flex-wrap:wrap;gap:4px 14px;color:var(--muted);font-size:14px}
.dtl-m{display:inline-flex;align-items:center;gap:5px}
.dtl-m svg{width:16px;height:16px;color:#2448FF;flex:0 0 16px}
.dtl-ct{margin-top:10px;border-top:1px solid #EEF0F4;padding-top:6px}
.dtl-ct>summary{cursor:pointer;font-weight:700;font-size:14.5px;min-height:34px;display:flex;align-items:center;gap:4px}
.dtl-ct[open]>summary{margin-bottom:6px}
.dtl-o{padding:14px 16px}
.dtl-o p{margin:6px 0 0}
.dtl-o .tk-actions{margin:10px 0 0}
.dtl-p-t{font-weight:800}
.dtl-p-lop{font-weight:700;font-size:14px;margin:10px 0 2px!important}
.dtl-p-ds{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.dtl-p-ds a{font-weight:600}
.dtl .btn.btn-sm{min-height:38px;padding:7px 14px;font-size:14.5px}
@media (max-width:900px){
  .dtl{grid-template-columns:minmax(0,1fr);grid-template-areas:"ht" "ds" "phu"}
  .dtl.dtl-khong-ht{grid-template-areas:"ds" "phu"}
  .dtl-phu{position:static;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
  /* Điện thoại: thẻ lớp sắp tới đã nằm ngay trên, không lặp ô Buổi tiếp theo; Hỏi Thạo gọn một dòng. */
  .dtl-o-trung{display:none}
  .dtl-o-hoi{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
  .dtl-o-hoi .dtl-hoi-d{display:none}
  .dtl-o-hoi .tk-actions{flex:0 0 auto;margin:0}
}
@media (max-width:640px){
  .dtl-moc-ds{grid-template-columns:repeat(5,minmax(0,1fr))!important;gap:2px}
  .dtl-ht .dt-moc{display:block}
  .dtl-ht .dt-moc-cuoi{margin:0;padding:0 0 0 2px;border-top:0;border-left:1px dashed #E2C27A}
  .dtl-moc-b{padding:6px 1px}
  .dtl-moc-b .dt-moc-t b{font-size:12px}
  .dtl-moc-b .dt-moc-t small{display:none}
  .dtl-moc-b .dt-moc-dot{width:30px;height:30px}
  .dtl-dau{grid-template-columns:auto minmax(0,1fr)}
  .dtl-act{grid-column:1/-1}
  .dtl-ngay{min-width:62px}
}
.dtl-m a{white-space:nowrap}
/* Ô Tài liệu: mỗi link một dòng có icon (Tim chốt 24/10/2026) */
.dtl-p-ds{gap:2px;margin-top:6px}
.dtl-tl{display:flex;align-items:center;gap:10px;min-height:40px;padding:4px 6px;margin:0 -6px;border-radius:8px;font-weight:600;text-decoration:none}
.dtl-tl:hover{background:#F3F5FF}
.dtl-tl:hover span:first-of-type{text-decoration:underline}
.dtl-tl svg{flex:0 0 22px;width:22px;height:22px}
.dtl-tl-zalo svg{color:#0068FF}
.dtl-tl-anh svg,.dtl-tl-slide svg{color:#2448FF}
.dtl-tl-ra{margin-left:auto;color:var(--muted);font-size:13px}
/* Nhận diện Thạo dùng chung (Tim chốt 24/10/2026): ô có Thạo + nút lime có đầu Thạo 3D như nút menu "Nhờ Thạo giúp" */
.thao-o{background:linear-gradient(160deg,#EEF1FF 0%,#fff 72%);border-color:#C9D3FF}
.thao-o-dau{display:flex;gap:12px;align-items:center}
.thao-o-dau img{flex:none;width:52px;height:48px;object-fit:contain}
.thao-o-k{margin:0!important;font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:800;color:#1733C9}
.thao-o-t{margin:2px 0 0!important;font-weight:800;font-size:17px;line-height:1.3;color:var(--ink)}
.btn-thao{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:4px 16px 4px 8px;border-radius:var(--rb);background:var(--hi);color:var(--ink);font-weight:700;font-size:15px;text-decoration:none;white-space:nowrap}
.btn-thao:hover{background:#E6FB6E;text-decoration:none;color:var(--ink)}
.btn-thao:focus-visible{outline:3px solid #2448FF;outline-offset:2px}
a.btn-thao:hover .nav-cta-3d,a.btn-thao:focus-visible .nav-cta-3d{background-position:100% 0;transform:translateY(-2px) rotate(-7deg)}
a.btn-thao:active .nav-cta-3d{background-position:100% 0;transform:scale(.92)}
@media (prefers-reduced-motion:reduce){a.btn-thao:hover .nav-cta-3d,a.btn-thao:focus-visible .nav-cta-3d,a.btn-thao:active .nav-cta-3d{transform:none}}
a.dtl-moc-b{color:inherit}
.tcm-ht .dtl-moc-b .dt-moc-t small{display:block}
/* Poster lớp học khi rê chuột hoặc chạm (Tim chốt 24/10/2026) */
.ps-ten-a{color:inherit;text-decoration:none;border-bottom:1px dashed currentColor}
.ps-ten-a:hover,.ps-ten-a:focus-visible{color:#1733C9;border-bottom-style:solid}
.ps-nut{display:none;margin-left:8px;padding:2px 10px;border:1px solid #C9D3FF;border-radius:999px;background:#F3F5FF;color:#1733C9;font:inherit;font-size:12.5px;font-weight:700;cursor:pointer;vertical-align:1px}
@media (hover:none),(pointer:coarse){.ps-nut{display:inline-block}}
.ps-pop{position:absolute;z-index:60;width:340px;max-width:calc(100vw - 16px);background:#0E1C30;color:#FAF9F7;border-radius:14px;overflow:hidden;box-shadow:0 18px 50px rgba(14,28,48,.35),0 2px 8px rgba(14,28,48,.2);opacity:0;transform:translateY(6px) scale(.98);transition:opacity .16s ease,transform .16s ease}
.ps-pop.is-mo{opacity:1;transform:none}
.ps-pop[hidden]{display:none}
.ps-pop img{display:block;width:100%;height:auto;background:#0E1C30}
.ps-tt{padding:12px 14px 14px}
.ps-tt p{margin:0}
.ps-ten{font-weight:800;font-size:16px;color:#E2C27A}
.ps-meta{margin-top:4px!important;font-size:13.5px;color:#C9CFDA}
.ps-mo{margin-top:8px!important;font-size:14px;line-height:1.5;color:#FAF9F7}
.ps-act{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin-top:12px!important}
.ps-phu{padding:0;border:0;background:none;color:#C9D3FF;font:inherit;font-size:13.5px;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.ps-phu:hover,.ps-phu:focus-visible{color:#fff}
.ps-anh-b{display:block;width:100%;padding:0;border:0;background:#0E1C30;cursor:zoom-in}
/* Thư viện poster lớn: lớp phủ ngay trên trang, không mở cửa sổ mới (Tim 24/10/2026 18:02) */
html.ps-gal-khoa{overflow:hidden}
.ps-gal{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;transition:opacity .18s ease}
.ps-gal.is-mo{opacity:1}
.ps-gal[hidden]{display:none}
.ps-gal-nen{position:absolute;inset:0;background:rgba(8,16,30,.86);backdrop-filter:blur(3px)}
.ps-gal-hop{position:relative;display:grid;grid-template-columns:minmax(0,auto) 300px;gap:0;max-width:min(1040px,100%);max-height:calc(100vh - 32px);background:#0E1C30;color:#FAF9F7;border-radius:16px;overflow:hidden;box-shadow:0 24px 70px rgba(0,0,0,.45)}
.ps-gal-anh{margin:0;display:flex;align-items:center;justify-content:center;background:#08101E;min-width:0}
.ps-gal-anh img{display:block;max-width:100%;max-height:calc(100vh - 32px);width:auto;height:auto;object-fit:contain}
.ps-gal-tt{align-self:end;padding:20px 20px 22px!important;overflow:auto}
.ps-gal-tt .ps-ten{font-size:18px}
.ps-gal-dk{display:flex;align-items:center;gap:12px;margin-top:16px!important;padding-top:14px;border-top:1px solid rgba(255,255,255,.12)}
.ps-gal-so{flex:1;text-align:center;font-size:12.5px;color:#9AA6BA;letter-spacing:.04em}
.ps-gal-dong{position:absolute;top:10px;right:10px;z-index:2;width:40px;height:40px;border:0;border-radius:50%;background:rgba(14,28,48,.75);color:#fff;font-size:26px;line-height:1;cursor:pointer}
.ps-gal-nut{width:44px;height:44px;border:1px solid rgba(255,255,255,.22);border-radius:50%;background:transparent;color:#fff;font-size:26px;line-height:1;cursor:pointer}
.ps-gal-dong:hover,.ps-gal-nut:hover,.ps-gal-dong:focus-visible,.ps-gal-nut:focus-visible{background:#2448FF}
@media (max-width:760px){
  .ps-gal{padding:0;align-items:stretch}
  .ps-gal-hop{grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) auto;max-height:none;height:100%;width:100%;border-radius:0}
  .ps-gal-anh img{max-height:calc(100vh - 190px)}
  .ps-gal-tt{padding:14px 16px 18px!important}
  .ps-gal-tt .ps-mo{display:none}
}
@media (prefers-reduced-motion:reduce){.ps-gal{transition:none}}
/* Poster đầu thẻ bấm được để xem lớn */
.dt-kp-o .ps-the{position:relative;cursor:zoom-in}
.ps-the-phong{position:absolute;right:10px;bottom:10px;padding:3px 10px;border-radius:999px;background:rgba(14,28,48,.78);color:#fff;font-size:12px;font-weight:700;opacity:0;transition:opacity .16s ease}
.dt-kp-o .ps-the:hover .ps-the-phong,.dt-kp-o .ps-the:focus-visible .ps-the-phong{opacity:1}
@media (hover:none),(pointer:coarse){.ps-the-phong{opacity:1}}
.dt-kp-th{margin-left:0}
.dt-kp-o .tk-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px}
@media (prefers-reduced-motion:reduce){.ps-pop{transition:none;transform:none}}
/* Nhãn Thạo không xuống dòng ở cột hẹp */
.thao-o-k{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.08em}
/* Poster đầu thẻ ở Khám phá lớp học; poster tự dựng khi chưa có poster riêng */
.dt-kp-o .ps-the{display:block;margin:-16px -18px 6px;aspect-ratio:16/10;overflow:hidden;border-radius:8px 8px 0 0;background:#0E1C30}
.dt-kp-o .ps-the > img{display:block;width:100%;height:100%;object-fit:cover;object-position:top left;transition:transform .3s ease}
.dt-kp-o:hover .ps-the > img{transform:scale(1.03)}
.ps-tao{position:relative;display:flex;flex-direction:column;justify-content:flex-start;gap:8px;width:100%;height:100%;box-sizing:border-box;padding:16px 18px;background:radial-gradient(120% 90% at 100% 100%,rgba(36,72,255,.55) 0%,rgba(36,72,255,0) 60%),linear-gradient(160deg,#0E1C30 0%,#132a52 100%);color:#FAF9F7;overflow:hidden}
.ps-tao-k{display:inline-block;align-self:flex-start;padding:3px 10px;border:1px solid rgba(226,194,122,.7);border-radius:999px;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#E2C27A}
.ps-tao-t{font-family:Georgia,'Times New Roman',serif;font-weight:700;font-size:26px;line-height:1.1;color:#fff;max-width:75%}
.ps-tao img,.dt-kp-o .ps-tao img{position:absolute;right:10px;bottom:6px;width:72px;height:auto;object-fit:contain}
@media (prefers-reduced-motion:reduce){.dt-kp-o .ps-the > img{transition:none}.dt-kp-o:hover .ps-the > img{transform:none}}
/* Ô trống Lớp học của tôi: lời mời học có poster */
.dtl-trong{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:20px;align-items:start;padding:18px 20px}
.dtl-trong-anh .ps-the{display:block;aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:#0E1C30}
.dtl-trong-anh .ps-the > img{display:block;width:100%;height:100%;object-fit:cover;object-position:top left}
.dtl-trong-anh .ps-tao img{position:absolute;right:10px;bottom:6px;width:72px;height:auto}
.dtl-trong h2{margin:4px 0 8px;font-size:21px}
.dtl-trong p{margin:0 0 10px}
.dtl-trong .tk-actions{display:flex;flex-wrap:wrap;gap:8px}
.dtl-trong-k01{margin-top:6px}
@media (max-width:720px){.dtl-trong{grid-template-columns:1fr}}
.dt-vl-th{margin-top:10px;font-size:15px}
.dt-vl-th a{font-weight:700}
/* Rủ bạn học cùng (Tim chốt 24/10/2026 19:09) */
.dt-gt-nut{display:inline-flex;align-items:center;gap:8px}
.dt-gt-ic{width:18px;height:18px;flex:none}
.ps-chia-se .dt-gt-ic{width:15px;height:15px;vertical-align:-2px}
.ps-chia-se{display:inline-flex;align-items:center;gap:6px}
.dtl-o-gt p{margin:0 0 10px}
.dt-gt-hh{display:flex;align-items:center;gap:12px;margin:12px 0 10px;padding:10px 12px;border-radius:12px;background:#F3F5FF;border:1px dashed #C9D3FF}
.dt-gt-hh.is-co{background:#F6FBDD;border:1px solid #D7F24A}
.dt-gt-hh:not(.is-co) .dt-gt-hh-ic{filter:grayscale(1);opacity:.45}
.dt-gt-hh-ic{width:40px;height:40px;flex:none}
.dt-gt-hh p{margin:0!important}
.dt-gt-hh-t{font-weight:800;font-size:14.5px}
.dt-gt-hh-d{font-size:13px;color:#5A6272}
.dt-gt-so{display:flex;gap:16px;font-size:14px}
.dt-gt-so b{font-size:18px;margin-right:2px}
.dt-gt-tien p{font-size:14px}
.dt-gt-tien .dt-ht-bar{margin:4px 0 10px}
.dt-gt-phieu{padding:8px 10px;border-radius:10px;background:#0E1C30;color:#FAF9F7;font-size:14px}
.dt-gt-cach ul{margin:8px 0 0;padding-left:18px;font-size:13.5px;line-height:1.5}
.dt-gt-cach li{margin-bottom:4px}
.dt-gt-xong{margin:16px 0;border-left:4px solid #D7F24A}
.dt-gt-xong h2{margin:2px 0 8px;font-size:20px}
.dt-gt-qt-o{padding:12px 0;border-top:1px solid #E6E8EE}
.dt-gt-qt-o:first-of-type{border-top:0}
.dt-gt-qt-dau{margin:0 0 4px}
/* Ô Rủ bạn học cùng: nổi bật theo nhận diện (nền xanh đậm, điểm nhấn vàng chanh), Tim 24/10/2026 19:59 */
.dtl-o.dtl-o-gt{background:radial-gradient(120% 80% at 100% 0%,rgba(36,72,255,.45) 0%,rgba(36,72,255,0) 60%),#0E1C30;color:#FAF9F7;border:0}
.dtl-o-gt .dt-gt-k{margin:0 0 6px;font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#D7F24A}
.dtl-o-gt .dt-gt-h{margin:0 0 12px;font-size:19px;line-height:1.3;color:#fff}
.dtl-o-gt .dt-gt-h span{color:#D7F24A}
.dt-gt-qua{list-style:none;margin:0 0 12px;padding:0;display:grid;gap:8px}
.dt-gt-qua li{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;background:rgba(255,255,255,.07)}
.dt-gt-qua li .dt-gt-hh-ic{width:34px;height:34px}
.dt-gt-qua li:first-child:not(.is-co) .dt-gt-hh-ic{filter:grayscale(1);opacity:.55}
.dt-gt-qua b{display:block;font-size:14px}
.dt-gt-qua small{display:block;font-size:12.5px;color:#C9CFDA}
.dt-gt-tien2{display:flex;align-items:center;gap:10px;margin:0 0 4px;font-size:13.5px;color:#E7EAF0}
.dt-gt-cham{display:inline-flex;gap:5px}
.dt-gt-cham i{width:12px;height:12px;border-radius:50%;border:2px solid #D7F24A}
.dt-gt-cham i.is-co{background:#D7F24A}
.dtl-o-gt .dt-gt-so2{margin:0 0 12px;font-size:12.5px;color:#9AA6BA}
.dtl-o-gt .dt-gt-chon{margin:4px 0 6px;font-size:13px;font-weight:700;color:#E7EAF0}
.dt-gt-lop{list-style:none;margin:0 0 10px;padding:0;display:grid;gap:8px}
.dt-gt-lop li{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px;border-radius:10px;background:#FAF9F7;color:#0E1C30}
.dt-gt-lop b{display:block;font-size:14.5px}
.dt-gt-lop small{display:block;font-size:12.5px;color:#5A6272;line-height:1.35}
.dt-gt-moi{flex:none;display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border:0;border-radius:999px;background:#D7F24A;color:#0E1C30;font:inherit;font-size:13.5px;font-weight:800;cursor:pointer}
.dt-gt-moi:hover,.dt-gt-moi:focus-visible{background:#C6E62E;outline:2px solid #fff;outline-offset:2px}
.dt-gt-moi .dt-gt-ic{width:16px;height:16px}
.dtl-o-gt .dt-gt-cach summary{color:#D7F24A}
.dtl-o-gt .dt-gt-cach{color:#E7EAF0}
.dt-lh-nav{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.dt-lh-nav a{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border:1px solid #C9D3FF;border-radius:999px;background:#F3F5FF;color:#1733C9;font-weight:700;font-size:14.5px;text-decoration:none}
.dt-lh-nav a:hover,.dt-lh-nav a:focus-visible{background:#1733C9;color:#fff;border-color:#1733C9}
.dt-lh-dem{padding:1px 8px;border-radius:999px;background:#D7F24A;color:#0E1C30;font-size:12px;font-weight:800}
#kham-pha,#lop-cua-toi{scroll-margin-top:84px}
@media (max-width:420px){.dt-lh-nav a{padding:6px 11px;font-size:13.5px}}