/* Trang bán khóa học (/khoa-hoc/{slug} khi chưa sở hữu). Đồng bộ với khu admin và khung học viên: nền kem, thẻ trắng bo tròn, nhấn đỏ thương hiệu. */
.sp{background:linear-gradient(180deg,#FDEFD9 0,var(--bg) 26rem);padding:1.25rem 0 4rem}
.sp-grid{display:grid;grid-template-columns:minmax(0,1fr) 22rem;grid-template-areas:"hero buy" "main buy";column-gap:2rem;row-gap:1.5rem;align-items:start;max-width:70rem}
.sp-hero{grid-area:hero;padding-top:.25rem}
.sp-buy{grid-area:buy;position:sticky;top:5rem;align-self:start}
.sp-main{grid-area:main;display:flex;flex-direction:column;gap:1.25rem;min-width:0}
@media(max-width:900px){
  .sp-grid{grid-template-columns:minmax(0,1fr);grid-template-areas:"hero" "buy" "main"}
  .sp-buy{position:static}
  .sp{padding-bottom:5.5rem}
}

/* Hero */
.sp-eyebrow{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);background:var(--red-soft);border-radius:999px;padding:.25rem .75rem;margin-bottom:.75rem}
.sp-hero h1{font-size:2.25rem;line-height:1.2;letter-spacing:-.01em;margin:0 0 .75rem}
.sp-lead{font-size:1.125rem;line-height:1.6;color:var(--muted);margin:0 0 1.1rem;max-width:40rem}
.sp-meta{list-style:none;margin:0 0 1.25rem;padding:0;display:flex;flex-wrap:wrap;gap:.5rem}
.sp-meta li{display:inline-flex;align-items:center;gap:.4rem;background:#fff;border:1px solid var(--line);border-radius:999px;padding:.35rem .85rem;font-size:.8125rem;font-weight:500}
.sp-meta .ic{color:var(--brand)}
.sp-by{display:flex;align-items:center;gap:.75rem;font-size:.875rem}
.sp-by img{width:44px;height:44px;border-radius:50%;object-fit:cover;object-position:center top;border:2px solid #fff;box-shadow:0 0 0 1px var(--line)}
.sp-by span{display:flex;flex-direction:column;line-height:1.35}.sp-by small{color:var(--muted);font-size:.75rem}
@media(max-width:560px){.sp-hero h1{font-size:1.65rem}.sp-lead{font-size:1rem}}

/* Thẻ mua */
.sp-buycard{background:#fff;border:1px solid var(--line);border-radius:20px;padding:1.5rem;box-shadow:0 12px 32px -12px rgba(66,40,21,.18);text-align:center}
.sp-buycard .price{font-size:2.75rem;line-height:1.1;margin:0 0 .15rem}
.sp-buycard .btn.lg{border-radius:12px;padding:.9rem 1.25rem;box-shadow:0 6px 16px -6px rgba(205,31,49,.55)}
.sp-incl{list-style:none;margin:1.25rem 0 0;padding:1.1rem 0 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:.6rem;text-align:left;font-size:.875rem}
.sp-incl li{display:flex;gap:.55rem;align-items:flex-start;line-height:1.45}.sp-incl .ic{flex:0 0 auto;color:var(--brand);margin-top:.15rem}

/* Thẻ nội dung */
.sp-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:1.5rem 1.6rem}
.sp-card h2{font-size:1.2rem;margin:0 0 1rem;letter-spacing:-.005em}
.sp-head{display:flex;align-items:baseline;justify-content:space-between;gap:.75rem;margin-bottom:1rem}.sp-head h2{margin:0}.sp-head span{font-size:.8125rem;color:var(--muted)}
.sp-free{display:inline-block;font-style:normal;font-size:.6875rem;font-weight:700;color:#17663b;background:rgba(31,140,80,.14);border-radius:999px;padding:.1rem .55rem}
.sp-prev{padding:.6rem .6rem 1rem}.sp-prev .video{border-radius:14px}.sp-prev p{margin:.8rem .9rem 0;font-size:.875rem;color:var(--muted)}
.sp-hl{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.85rem 1.5rem}
.sp-hl li{display:flex;gap:.65rem;font-size:.9375rem;line-height:1.5}.sp-hl .ic{flex:0 0 auto;color:var(--brand);margin-top:.1rem}
@media(max-width:700px){.sp-hl{grid-template-columns:1fr}.sp-card{padding:1.25rem 1.1rem}}

/* Chương trình học */
.sp-ch{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden}
.sp-ch+.sp-ch,.sp-ch+.sp-ls,.sp-ls+.sp-ch{margin-top:.6rem}
.sp-ch[open]{border-color:#E7D3B6}
.sp-ch>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:.8rem;padding:.8rem .95rem}
.sp-ch>summary::-webkit-details-marker{display:none}
.sp-ch>summary:hover{background:var(--bg)}
.sp-ch>summary:focus{outline:none}.sp-ch>summary:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;border-radius:14px}
.sp-chi{flex:0 0 auto;width:2rem;height:2rem;border-radius:50%;background:var(--bg);border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.8125rem}
.sp-cht{flex:1;min-width:0;display:flex;flex-direction:column;line-height:1.35}.sp-cht strong{font-size:.9375rem}.sp-cht small{color:var(--muted);font-size:.75rem}
.sp-chv{flex:0 0 auto;width:.55rem;height:.55rem;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);margin:0 .25rem .2rem 0;transition:transform .15s}
.sp-ch[open]>summary .sp-chv{transform:rotate(-135deg);margin:.2rem .25rem 0 0}
.sp-ls{list-style:none;margin:0;padding:.25rem .5rem .6rem;border-top:1px solid var(--line)}
.sp-ls.plain{border:0;padding:0}
.sp-ls li{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.6rem .55rem;border-radius:10px;font-size:.9rem;line-height:1.4}
.sp-ls li+li{border-top:1px solid #F7EEDF}
.sp-lt{display:flex;align-items:center;gap:.6rem;min-width:0}.sp-lt .ic{flex:0 0 auto;color:#CDBBA2}
.sp-ld{flex:0 0 auto;font-size:.8125rem;color:var(--muted)}

/* Giảng viên */
.sp-inst{display:flex;gap:1.25rem;align-items:flex-start}
.sp-inst img{flex:0 0 auto;width:96px;height:96px;border-radius:50%;object-fit:cover;object-position:center top;border:3px solid #fff;box-shadow:0 0 0 1px var(--line)}
.sp-inst h2{margin-bottom:.15rem}.sp-role{font-size:.8125rem;color:var(--muted);margin:0 0 .6rem}.sp-inst p:last-child{margin:0;font-size:.9rem;line-height:1.65}
@media(max-width:560px){.sp-inst{flex-direction:column}}
.sp-note{font-size:.75rem;color:var(--muted);margin:.25rem .25rem 0;line-height:1.6}.sp-note a{color:var(--brand)}

/* Thanh mua cố định trên điện thoại */
.sp-bar{display:none}
@media(max-width:900px){
  .sp-bar{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 1rem;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-top:1px solid var(--line);box-shadow:0 -8px 24px -12px rgba(66,40,21,.2)}
  .sp-bar span{display:flex;flex-direction:column;line-height:1.2}.sp-bar strong{font-size:1.25rem;color:var(--brand)}.sp-bar small{font-size:.6875rem;color:var(--muted)}
  .sp-bar .btn{padding:.65rem 1.25rem;border-radius:12px}
}

.sp-ls li.sp-pv{cursor:pointer}.sp-ls li.sp-pv:hover,.sp-ls li.sp-pv:focus-visible{background:var(--bg);outline:none}.sp-pv .sp-lt .ic{color:var(--brand)}.sp-pv .sp-free{transition:background .15s}.sp-pv:hover .sp-free{background:rgba(31,140,80,.24)}
.sp-agree{margin:.9rem 0 0;font-size:.6875rem;line-height:1.55;color:var(--muted)}.sp-agree a{color:var(--brand);text-decoration:underline}
.sp-sub{margin:-.6rem 0 1.1rem;font-size:.875rem;color:var(--muted)}