/* ════════════════════════════════════════════════════════════════════
   LỚP HỌC THỬ — trang công khai cho người chưa có tài khoản.
   Template: ui/hoc_thu/*.html (khung riêng _khung.html, KHÔNG dùng khung quản trị).
   Tiền tác ht-. Chỉ dùng token màu chung (--mau-*) + một dải màu nhấn riêng.
   ════════════════════════════════════════════════════════════════════ */
:root {
  --ht-1: #1d4ed8;
  --ht-2: #0ea5e9;
  --ht-3: #16a34a;
}

.ht-body { margin: 0; background: var(--mau-nen, #f8fafc); color: var(--mau-chu, #0f172a);
  font-family: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif; }
.ht-dau { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding: 12px 20px;
  background: var(--mau-mat, #fff); border-bottom: 1px solid var(--mau-vien, #e2e8f0); position: sticky; top: 0; z-index: 20; }
.ht-dau .ht-ten { font-weight: 800; font-size: 16px; display: flex; align-items: center; gap: 8px; min-width: 0; }
.ht-dau .ht-ten i { color: var(--ht-1); }
.ht-dau .ht-phai { margin-left: auto; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 13px; }
.ht-chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px;
  background: color-mix(in srgb, var(--ht-2) 12%, transparent); color: var(--ht-1); font-size: 12.5px; font-weight: 600; }
.ht-trang { max-width: 1040px; margin: 0 auto; padding: 20px 16px 48px; }
.ht-hep { max-width: 560px; }

/* Trang đích */
.ht-hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 24px; align-items: start; }
.ht-hero h1 { font-size: 30px; line-height: 1.25; margin: 6px 0 10px; text-wrap: balance; }
.ht-hero .ht-moi { font-size: 16px; color: var(--mau-chu-2, #334155); line-height: 1.6; }
.ht-diem { display: grid; gap: 10px; margin: 18px 0 0; padding: 0; list-style: none; }
.ht-diem li { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; line-height: 1.5; }
.ht-diem i { color: var(--ht-3); margin-top: 3px; }
.ht-the { background: var(--mau-mat, #fff); border: 1px solid var(--mau-vien, #e2e8f0); border-radius: 18px;
  padding: 18px; box-shadow: 0 18px 40px -28px rgba(15, 23, 42, .45); }
.ht-the h2 { margin: 0 0 4px; font-size: 18px; }
.ht-the .ht-phu { margin: 0 0 14px; font-size: 13px; color: var(--mau-chu-mo, #64748b); }
.ht-o { display: grid; gap: 4px; margin-bottom: 12px; }
.ht-o label { font-size: 13px; font-weight: 600; }
.ht-o input { width: 100%; padding: 11px 12px; border-radius: 12px; border: 1.5px solid var(--mau-vien, #e2e8f0);
  font: inherit; font-size: 15px; background: var(--mau-mat, #fff); color: var(--mau-chu, inherit); }
.ht-o input:focus-visible { outline: 2px solid var(--ht-1); outline-offset: 1px; border-color: var(--ht-1); }
.ht-o .ht-loi { color: var(--mau-loi, #dc2626); font-size: 12.5px; }
.ht-nut { display: inline-flex; align-items: center; justify-content: center; gap: 8px; width: 100%; min-height: 48px;
  border: 0; border-radius: 14px; cursor: pointer; font: inherit; font-size: 16px; font-weight: 700; color: #fff;
  background: linear-gradient(120deg, var(--ht-1), var(--ht-2)); box-shadow: 0 12px 24px -14px var(--ht-1); }
.ht-nut:hover { filter: brightness(1.06); }
.ht-nut-phu { background: var(--mau-mat, #fff); color: var(--mau-chu, inherit); border: 1.5px solid var(--mau-vien, #e2e8f0);
  box-shadow: none; width: auto; min-height: 40px; padding: 0 16px; font-size: 14px; }
.ht-nut-nho { width: auto; min-height: 38px; padding: 0 14px; font-size: 14px; }
.ht-ghi-chu { margin: 12px 0 0; font-size: 12px; color: var(--mau-chu-mo, #64748b); line-height: 1.5; }
.ht-canh-bao { padding: 10px 12px; border-radius: 12px; font-size: 13.5px; line-height: 1.5; margin-bottom: 12px;
  background: color-mix(in srgb, var(--mau-loi, #dc2626) 10%, transparent); color: var(--mau-loi, #b91c1c); }
.ht-tin { background: color-mix(in srgb, var(--ht-2) 12%, transparent); color: var(--ht-1); }

/* Lộ trình 3 bước */
.ht-lo-trinh { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.ht-buoc { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 14px;
  border: 1.5px solid var(--mau-vien, #e2e8f0); background: var(--mau-mat, #fff); }
.ht-buoc.xong { border-color: var(--ht-3); background: color-mix(in srgb, var(--ht-3) 8%, transparent); }
.ht-buoc .so { flex-shrink: 0; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: color-mix(in srgb, var(--ht-1) 12%, transparent); color: var(--ht-1); font-weight: 800; }
.ht-buoc.xong .so { background: var(--ht-3); color: #fff; }
.ht-buoc .ten { font-weight: 600; }
.ht-buoc .ht-phu { font-size: 12.5px; color: var(--mau-chu-mo, #64748b); }
.ht-thanh { height: 8px; border-radius: 99px; background: var(--mau-vien, #e2e8f0); overflow: hidden; margin: 10px 0 4px; }
.ht-thanh i { display: block; height: 100%; background: linear-gradient(90deg, var(--ht-1), var(--ht-3)); }

/* Danh sách học liệu / quiz */
.ht-ds { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.ht-muc { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 14px;
  border: 1px solid var(--mau-vien, #e2e8f0); background: var(--mau-mat, #fff); text-decoration: none; color: inherit; }
.ht-muc:hover { border-color: var(--ht-1); }
.ht-muc .bt { flex-shrink: 0; display: grid; place-items: center; width: 38px; height: 38px; border-radius: 11px;
  background: color-mix(in srgb, var(--ht-1) 10%, transparent); color: var(--ht-1); }
.ht-muc .ten { font-weight: 600; min-width: 0; overflow-wrap: anywhere; }
.ht-muc .ht-phu { font-size: 12.5px; color: var(--mau-chu-mo, #64748b); }
.ht-muc.xong .bt { background: color-mix(in srgb, var(--ht-3) 14%, transparent); color: var(--ht-3); }
.ht-khoi { margin-top: 22px; }
.ht-khoi h2 { font-size: 18px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.ht-khoi h2 i { color: var(--ht-1); }
.ht-luoi { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 22px; align-items: start; }

/* Trang xem học liệu */
.ht-xem { display: grid; gap: 12px; }
.ht-khung { width: 100%; height: min(72vh, 780px); border: 1px solid var(--mau-vien, #e2e8f0); border-radius: 14px; background: #fff; }
.ht-dieu-huong { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.ht-dieu-huong .ht-nut { width: auto; }

/* Chứng nhận */
.ht-cn { max-width: 720px; margin: 24px auto; padding: 36px 32px; border-radius: 20px; text-align: center;
  background: var(--mau-mat, #fff); border: 2px solid var(--ht-1); box-shadow: 0 24px 60px -34px rgba(15, 23, 42, .5); }
.ht-cn h1 { font-size: 24px; margin: 8px 0; letter-spacing: .5px; }
.ht-cn .ten { font-size: 30px; font-weight: 800; color: var(--ht-1); margin: 14px 0 6px; }
.ht-cn .ma { font-family: ui-monospace, Consolas, monospace; font-size: 13px; color: var(--mau-chu-mo, #64748b); }

/* Quản lý (giảng viên) — chèn trong khung quản trị, dùng thêm token chung */
.ht-ql-luoi { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 10px; }
.ht-ql-qr { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.ht-ql-qr img { width: 150px; height: 150px; border: 1px solid var(--mau-vien); border-radius: 12px; background: #fff; }
.ht-ql-lk { font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; overflow-wrap: anywhere; }

@media (max-width: 860px) {
  .ht-hero, .ht-luoi { grid-template-columns: minmax(0, 1fr); }
  .ht-hero h1 { font-size: 25px; }
}