/* Khóa "Bán dịch vụ nội thất không cần giảm giá" — bổ sung trên course.css (khung CME) */
body.sales{--ease-out:cubic-bezier(.23,1,.32,1)}
/* Logo: chỉ hiện 1 bản theo nền (chép luật của v3/kaiopen.css để trang tự đứng được khi CSS chung chưa tải) */
.sales .official-brand img{background:none;padding:0}
.sales .official-brand .ko-logo-light{display:none}
:root[data-theme=light] .sales .official-brand .ko-logo-dark,html[data-appearance=light] .sales .official-brand .ko-logo-dark{display:none}
:root[data-theme=light] .sales .official-brand .ko-logo-light,html[data-appearance=light] .sales .official-brand .ko-logo-light{display:block}
.sales ::selection{background:var(--accent);color:#08231f}
.sales .small{font-size:13px;color:var(--muted)}
.sales .crumb{font-size:13px;color:var(--muted);margin:0 0 6px}
.sales .crumb a{color:var(--accent)}

/* Trang khóa */
.s-hero{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;padding:72px 0 48px;align-items:start}
.s-hero h1{margin-top:0}
.s-hero p:not(.lead){color:var(--muted)}
.s-panel{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:30px}
.s-panel h2{font-size:20px;margin:0 0 14px}
.plain{list-style:none;padding:0;margin:0}
.plain li{padding:11px 0;border-bottom:1px solid var(--line);font-size:15px}
.plain li:last-child{border:0}
.resume{margin:0;font-size:14px}
.resume a{color:var(--accent);font-weight:650}
.s-how{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:30px 0;margin:8px 0 56px}
.s-how h2{font-size:20px;margin:0 0 18px}
.steps{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.steps li{counter-increment:s;font-size:14px;color:var(--muted);margin:0}
.steps li::before{content:counter(s,decimal-leading-zero);display:block;color:var(--accent);font-weight:700;font-size:13px;margin-bottom:6px}
.steps b{display:block;color:inherit;font-size:16px;margin-bottom:4px;color:var(--text,inherit)}
.toc-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap}
.toc h2,.gift h2{font-size:26px}
.chapter{display:grid;grid-template-columns:260px minmax(0,1fr);gap:32px;padding:22px 0;border-top:1px solid var(--line)}
.chapter h3{margin:6px 0 0;font-size:19px}
.chapter h3 span{display:block;font-size:13px;color:var(--accent);font-weight:700;margin-bottom:2px}
.chapter ol,.giftlist{list-style:none;padding:0;margin:0}
.chapter li,.giftlist li{margin:0}
.chapter a,.giftlist a{display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:12px;align-items:baseline;padding:12px 10px;text-decoration:none;border-radius:4px}
.chapter a .n,.giftlist a .n{color:var(--accent);font-weight:700;font-size:14px;font-variant-numeric:tabular-nums}
.chapter a .t{font-size:16px}
.st{font-size:12px;color:var(--accent);white-space:nowrap}
.gift{margin:64px 0 0;padding:36px;background:var(--panel);border:1px solid var(--line);border-radius:6px}
.gift>p{color:var(--muted)}
.giftlist a{grid-template-columns:40px minmax(0,1fr)}
.giftlist .t b{display:block;font-size:16px;margin-bottom:2px}
.giftlist .t{color:var(--muted);font-size:14px}
.giftlist .t b{color:inherit}
.narrow{max-width:860px}
.narrow .giftlist{margin:28px 0}
@media (hover:hover) and (pointer:fine){
 .chapter a,.giftlist a,.pager a{transition:background-color .2s var(--ease-out)}
 .chapter a:hover,.giftlist a:hover{background:var(--panel)}
 .gift .giftlist a:hover{background:rgba(127,127,127,.08)}
 .button{transition:transform .2s var(--ease-out)}
}
.button:active{transform:scale(.97);transition:transform .12s var(--ease-out)}

/* Trang bài */
.sales .lesson-layout{grid-template-columns:270px minmax(0,1fr)}
.side-title{font-size:12px;color:var(--muted);margin:0 0 10px}
.side-ch{background:none;border:0;border-bottom:1px solid var(--line);padding:0;border-radius:0}
.side-ch summary{padding:11px 4px;font-size:13px;font-weight:650}
.sales .lesson-layout aside nav{padding:0 0 10px}
.sales .lesson-layout aside nav a{display:grid;grid-template-columns:20px 1fr;gap:6px;padding:7px 8px;line-height:1.4}
.sales .lesson-layout aside nav a span{color:var(--accent);font-size:12px}
.sales .lesson-layout aside nav a.done::after{content:"✓";color:var(--accent);margin-left:4px}
.h1-num{display:block;font-size:15px;color:var(--accent);letter-spacing:0;margin-bottom:6px}
.sales .lesson-title{margin:4px 0 14px}
.lesson-status .prog{margin-left:auto}
.onpage{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13px;padding:14px 0;border-bottom:1px solid var(--line)}
.onpage a{color:var(--muted);text-decoration:none;display:inline-block;padding:6px 0;min-height:32px}
.onpage a:hover{color:var(--accent)}
.prose{max-width:76ch;font-size:16.5px}
.prose h2{font-size:25px;margin:44px 0 12px;scroll-margin-top:24px}
.prose h3{font-size:19px;margin:30px 0 8px}
.prose blockquote{margin:18px 0;padding:14px 20px;background:var(--panel);border-radius:4px;border:1px solid var(--line)}
.prose blockquote p{margin:6px 0}
.prose table{font-size:14.5px}
.prose td,.prose th{padding:10px 12px;vertical-align:top}
.table-scroll{margin:16px 0}
.table-scroll table{margin:0}
.table-scroll:focus-visible{outline:3px solid var(--accent)}
.answers{margin:18px 0}
.answers ol{margin:12px 0 0}
.checklist{list-style:none;padding:0}
.check label{display:grid;grid-template-columns:24px 1fr;gap:10px;align-items:start;cursor:pointer;padding:4px 0}
.check input,.done input{width:18px;height:18px;margin-top:5px;accent-color:var(--accent)}
.done-row{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin:40px 0 0;padding:18px 20px;background:var(--panel);border:1px solid var(--line);border-radius:6px}
.done{display:flex;gap:10px;align-items:center;font-weight:650;cursor:pointer}
.done input{margin:0}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0 0}
.pager a{display:block;padding:18px 20px;border:1px solid var(--line);border-radius:6px;text-decoration:none;font-weight:600;line-height:1.45}
.pager a small{display:block;font-weight:500;color:var(--accent);font-size:12px;margin-bottom:4px}
.pager .next{text-align:right}
.pager a:hover{border-color:var(--accent)}
footer .small{max-width:90ch;line-height:1.6}

@media(max-width:850px){
 .s-hero{grid-template-columns:1fr;gap:28px;padding:40px 0 32px}
 .steps{grid-template-columns:1fr 1fr;gap:20px}
 .chapter{grid-template-columns:1fr;gap:6px}
 .sales .lesson-layout{grid-template-columns:1fr}
 .sales .lesson-layout aside{max-height:none;padding:0;order:2;border-bottom:0;border-top:1px solid var(--line);margin-top:24px;padding-top:16px}
 .sales .lesson-layout article{order:1}
 .sales .lesson-layout aside nav{display:flex}
 .side-ch:not([open]) + .side-ch:not([open]){}
}
@media(max-width:560px){
 .steps{grid-template-columns:1fr}
 .gift{padding:22px 18px;margin-top:44px}
 .chapter a{grid-template-columns:40px minmax(0,1fr);padding:11px 4px}
 .chapter a .st{grid-column:2}
 .pager{grid-template-columns:1fr}
 .pager .next{text-align:left}
 .prose{font-size:16px}
 .prose h2{font-size:22px}
 .lesson-status .prog{margin-left:0}
}
@media(prefers-reduced-motion:reduce){.sales *{transition:none!important}}
@media print{.onpage,.pager,.done-row{display:none}}