:root{--bg:#fff7ea;--card:#fff;--ink:#1d1230;--muted:#5a4b70;--brand:#5a1fb8;--brand2:#d6246e;--gold:#ffd23f;--line:#1d1230;--ok:#1f8a4c;--no:#c0392b;--nav:#3a1480;--shadow:3px 3px 0 var(--line)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#17102b;--card:#2a1f4a;--ink:#f6efe2;--muted:#c6b9e0;--brand:#b68cff;--brand2:#ff7eb0;--line:#0c0718;--ok:#5fd68f;--no:#ff8a7a}}
:root[data-theme="dark"]{--bg:#17102b;--card:#2a1f4a;--ink:#f6efe2;--muted:#c6b9e0;--brand:#b68cff;--brand2:#ff7eb0;--line:#0c0718;--ok:#5fd68f;--no:#ff8a7a}
*{box-sizing:border-box}
body{margin:0;font:400 16px/1.6 "Be Vietnam Pro",system-ui,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;font-family:"Baloo 2","Be Vietnam Pro",system-ui,sans-serif}
a{color:var(--brand)}
.wrap{width:100%;max-width:1160px;margin:0 auto;padding:16px}
.wrap--narrow{max-width:780px}
.nav{background:var(--nav);border-bottom:3px solid var(--line)}
.nav__in{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:8px 16px}
.brand{color:#fff;font-weight:800;font-size:18px;text-decoration:none}
.menu-h{display:flex;align-items:center;gap:6px 16px;flex-wrap:wrap}
.menu-h a,.menu-h .linkbtn{color:#fff;text-decoration:none;padding:8px 2px;min-height:40px;display:inline-flex;align-items:center}
.linkbtn{background:none;border:0;font:inherit;cursor:pointer;padding:0;color:var(--brand)}
.menu-h .linkbtn{color:#ffd9e8}
.inline{display:inline;margin:0}
.foot{color:var(--muted);font-size:14px;text-align:center}
.card{background:var(--card);border:3px solid var(--line);border-radius:14px;padding:18px;margin:0 0 16px;box-shadow:var(--shadow)}
.hero{background:var(--nav);color:#fff;border:3px solid var(--line);border-radius:16px;padding:32px 20px;margin:0 0 24px}
.hero h1{font-size:clamp(28px,6vw,48px)}
.lead{font-size:18px;color:inherit}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 22px;border:3px solid var(--line);border-radius:999px;background:var(--gold);color:#1d1230;font:700 16px "Be Vietnam Pro",system-ui,sans-serif;text-decoration:none;cursor:pointer;box-shadow:var(--shadow)}
.btn:hover{transform:translate(-1px,-1px)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btn--big{min-height:54px;padding:10px 28px;font-size:18px}
.btn--sm{min-height:38px;padding:4px 14px;font-size:14px}
.btn--ghost{background:#fff}
.btn--danger{background:#ffb4a8}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.price{font-weight:800;font-size:20px;color:var(--brand2)}
.muted{color:var(--muted)}
.tag{background:var(--gold);color:#1d1230;border-radius:999px;padding:1px 8px;font-size:12px;font-weight:700}
.form{display:grid;gap:12px}
.form label,.row label{display:grid;gap:4px;font-weight:600}
.form .check,.row .check,label.check{display:flex;gap:8px;align-items:flex-start;font-weight:400}
input,select,textarea{font:inherit;color:inherit;background:var(--card);border:2px solid var(--line);border-radius:8px;padding:8px 10px;min-height:42px;max-width:100%}
input[type=checkbox]{min-height:0;width:20px;height:20px;margin-top:3px}
textarea{width:100%}
.form input:not([type=checkbox]),.form select{width:100%}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 8px}
.row input[name=title]{flex:1 1 220px}
.num{width:80px}
.flash{padding:10px 14px;border-radius:10px;border:2px solid var(--line);margin:0 0 14px;background:#d9f5e3;color:#0d3b20}
.flash--err{background:#ffd9d3;color:#5a1208}
.tbl{width:100%;border-collapse:collapse;background:var(--card);border:3px solid var(--line);margin:0 0 16px;display:block;overflow-x:auto}
.tbl th,.tbl td{padding:8px 10px;border-bottom:1px solid rgba(128,128,128,.35);text-align:left;vertical-align:top;font-size:14px}
.secret{word-break:break-all;background:#0001;padding:2px 6px;border-radius:6px}
.pre{white-space:pre-wrap;background:#0001;padding:10px;border-radius:8px}
.bad{color:var(--no)}
.admin-tabs{display:flex;flex-wrap:wrap;gap:6px 14px;margin:0 0 16px;border-bottom:3px solid var(--line);padding-bottom:8px}
.admin-tabs a{font-weight:700;text-decoration:none}
.stats{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.stat{display:grid;gap:2px;text-align:center}.stat b{font-size:26px}
.st-ready{color:var(--ok)}.st-error{color:var(--no)}
.lesson-row{border-top:1px dashed rgba(128,128,128,.5);padding-top:10px;margin-top:10px}
.vid{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:4px 0 10px}
.file{min-height:0;border:0;padding:0}
.bar{height:10px;background:#0002;border-radius:6px;overflow:hidden;margin:8px 0 4px}
.bar span{display:block;height:100%;background:var(--ok)}
.lessons{list-style:none;padding:0;margin:0}.lessons li{padding:6px 0;border-bottom:1px solid rgba(128,128,128,.25)}
.lessons li.cur{font-weight:800}.lessons a{text-decoration:none}
.learn{display:grid;gap:20px}
@media(min-width:900px){.learn{grid-template-columns:1fr 300px}}
.mod h4{margin-top:10px;color:var(--muted)}
/* trình phát */
.vwrap{position:relative;background:#000;border:3px solid var(--line);border-radius:12px;overflow:hidden;margin:0 0 12px;user-select:none;-webkit-user-select:none}
.vwrap video{width:100%;display:block;aspect-ratio:16/9;background:#000}
.wm{position:absolute;z-index:5;pointer-events:none;color:#fff;font:600 13px/1.2 system-ui,sans-serif;opacity:.28;text-shadow:0 0 3px #000;white-space:nowrap;transition:left 1.2s linear,top 1.2s linear}
.wm2{opacity:.16;font-size:11px}
/* hình mờ lớn chớp giữa khung vài giây mỗi 40–90 giây: khó cắt / che khi quay màn hình */
.wm3{position:absolute;z-index:5;left:50%;top:50%;transform:translate(-50%,-50%) rotate(-12deg);pointer-events:none;color:#fff;font:700 clamp(14px,3vw,32px)/1.25 system-ui,sans-serif;opacity:.3;text-shadow:0 0 6px #000;white-space:pre-line;overflow-wrap:anywhere;width:max-content;max-width:88%;text-align:center}
.vlock{position:absolute;inset:0;z-index:8;display:flex;align-items:center;justify-content:center;text-align:center;padding:24px;background:rgba(0,0,0,.92);color:#fff;font-weight:700;cursor:pointer}
.vlock[hidden]{display:none}
.vfs{position:absolute;right:10px;top:10px;z-index:6;background:rgba(0,0,0,.55);color:#fff;border:1px solid #fff6;border-radius:8px;padding:4px 10px;cursor:pointer;font:inherit;font-size:13px}
.vwrap:fullscreen video{height:100%;aspect-ratio:auto}
@media print{body{display:none}}
.bar .w0{width:0%}
.bar .w5{width:5%}
.bar .w10{width:10%}
.bar .w15{width:15%}
.bar .w20{width:20%}
.bar .w25{width:25%}
.bar .w30{width:30%}
.bar .w35{width:35%}
.bar .w40{width:40%}
.bar .w45{width:45%}
.bar .w50{width:50%}
.bar .w55{width:55%}
.bar .w60{width:60%}
.bar .w65{width:65%}
.bar .w70{width:70%}
.bar .w75{width:75%}
.bar .w80{width:80%}
.bar .w85{width:85%}
.bar .w90{width:90%}
.bar .w95{width:95%}
.bar .w100{width:100%}

.hero--course .facts{display:flex;flex-wrap:wrap;gap:8px 18px;margin:0 0 12px;font-size:15px}
.hero--course .price--big{font-size:34px;color:var(--gold);margin:8px 0}
.hero--course .muted,.hero--course a:not(.btn){color:#e8dcff}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:8px 0}
.steps-s{padding-left:20px;margin:0}.steps-s li{margin:6px 0}
.legal h2{font-size:20px;margin-top:18px}
.menu-h a.btn{color:#1d1230;min-height:36px;padding:4px 14px}
.saving{margin:4px 0 10px}
.ticks{padding-left:20px;margin:8px 0 14px}.ticks li{margin:4px 0}
.pay-grid{display:grid;gap:16px;align-items:start}
@media(min-width:700px){.pay-grid{grid-template-columns:280px 1fr}}
.pay-qr{background:#fff;border:3px solid var(--line);border-radius:12px;padding:10px;text-align:center;color:#1d1230}
.pay-qr img{width:100%;max-width:260px;height:auto;margin:0 auto;display:block}
.pay-info{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0}
.pay-info dt{color:var(--muted)}.pay-info dd{margin:0;font-weight:600;word-break:break-all}
.pay-qr .muted{color:#4a3a60}

.theme-btn{position:fixed;left:12px;bottom:84px;z-index:60;width:44px;height:44px;border-radius:50%;border:3px solid #1d1230;background:#ffd23f;color:#1d1230;font-size:20px;line-height:1;cursor:pointer;box-shadow:3px 3px 0 #1d1230;padding:0}
/* cộng đồng */
.cm-tabs{display:flex;flex-wrap:wrap;gap:6px 18px;margin:0 0 16px;border-bottom:3px solid var(--line);padding-bottom:8px}
.cm-tabs a{font-weight:700;text-decoration:none;padding:6px 0}.cm-tabs a.is-on{color:var(--brand2);border-bottom:3px solid var(--brand2)}
.cm-badge{background:var(--brand2);color:#fff;border-radius:999px;padding:0 7px;font-size:12px}
.cm-grid{display:grid;gap:20px}@media(min-width:900px){.cm-grid{grid-template-columns:1fr 300px}}
.cm-cats{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px}
.cm-cats a{border:2px solid var(--line);border-radius:999px;padding:4px 12px;text-decoration:none;background:var(--card);color:var(--ink);font-size:14px;font-weight:600}
.cm-cats a.is-on{background:var(--gold);color:#1d1230}
.cm-compose summary{cursor:pointer;display:flex;align-items:center;gap:10px;color:var(--muted);list-style:none}
.cm-compose[open] summary{margin-bottom:12px}
.cm-filter{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px}.cm-filter input[type=search]{flex:1 1 200px}
.cm-post h3{margin:8px 0 4px}.cm-post h3 a{text-decoration:none;color:var(--ink)}.cm-post h1{font-size:26px;margin:10px 0}
.cm-post.is-pinned{border-color:var(--brand2)}
.cm-head{display:flex;align-items:center;gap:10px}.cm-head>div{flex:1}
.cm-name{font-weight:700;text-decoration:none;color:var(--ink)}
.cm-pin{font-size:13px;font-weight:700;color:var(--brand2)}
.cm-meta{margin:6px 0 0;font-size:14px;color:var(--muted)}
.cm-body{margin:10px 0;word-wrap:break-word;overflow-wrap:anywhere}
.cm-actions{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;font-size:14px}
.cm-like{background:var(--card);color:var(--ink);border:2px solid var(--line);border-radius:999px;padding:2px 12px;cursor:pointer;font:inherit;min-height:34px}
.cm-like.is-on{background:var(--gold);color:#1d1230}
.cm-reply summary{cursor:pointer;color:var(--brand);list-style:none}.cm-reply[open]{flex-basis:100%}.cm-reply form{margin-top:8px}
.cm-com{background:var(--card);border:2px solid var(--line);border-radius:12px;padding:12px 14px;margin:0 0 10px}
.cm-com--re{margin:10px 0 0 22px;border-style:dashed}
.cm-av{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;color:#fff;font-weight:800;border:2px solid var(--line);flex:none}
.cm-av--s{width:30px;height:30px;font-size:14px}.cm-av--m{width:42px;height:42px;font-size:18px}.cm-av--l{width:72px;height:72px;font-size:32px}
.cm-c0{background:#d6246e}.cm-c1{background:#5a1fb8}.cm-c2{background:#1f8a4c}.cm-c3{background:#c26a00}.cm-c4{background:#0b7285}.cm-c5{background:#a61e4d}.cm-c6{background:#364fc7}.cm-c7{background:#862e9c}
.cm-lv{background:var(--brand);color:#fff;border-radius:999px;padding:1px 8px;font-size:12px;font-weight:700}
.cm-top{list-style:none;padding:0;margin:0}.cm-top li{display:flex;align-items:center;gap:8px;padding:6px 0;border-bottom:1px solid rgba(128,128,128,.25)}
.cm-top li a{flex:1;text-decoration:none;font-weight:600}.cm-rank{width:22px;font-weight:800;color:var(--muted)}
.cm-mem{list-style:none;padding:0;margin:0;max-height:520px;overflow:auto}.cm-mem li{display:flex;align-items:center;gap:8px;padding:5px 0}
.cm-pager{display:flex;gap:10px;align-items:center;justify-content:center}
.cm-unread{border-color:var(--brand2)}
/* khung chat */
.chat-btn{position:fixed;right:14px;bottom:84px;z-index:70;display:flex;align-items:center;gap:6px;border:3px solid #1d1230;background:#5a1fb8;color:#fff;border-radius:999px;padding:10px 16px;font:700 15px/1 "Be Vietnam Pro",system-ui,sans-serif;cursor:pointer;box-shadow:3px 3px 0 #1d1230}
.chat-btn__ic{font-size:18px}
.chat-box{position:fixed;right:14px;bottom:140px;z-index:71;width:min(380px,calc(100vw - 28px));height:min(560px,calc(100vh - 170px));display:flex;flex-direction:column;background:var(--bg,#fff7ea);color:var(--ink,#1d1230);border:3px solid #1d1230;border-radius:16px;box-shadow:5px 5px 0 #1d1230;overflow:hidden;font:400 15px/1.5 "Be Vietnam Pro",system-ui,sans-serif}
.chat-box[hidden]{display:none}
.chat-head{display:flex;align-items:center;justify-content:space-between;gap:8px;background:#3a1480;color:#fff;padding:10px 12px}
.chat-head small{display:block;opacity:.8;font-size:12px}
.chat-x{background:none;border:0;color:#fff;font-size:26px;line-height:1;cursor:pointer;min-width:40px;min-height:40px}
.chat-log2{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:8px}
.chat-row{display:flex;flex-direction:column;max-width:88%}
.chat-row--user{align-self:flex-end;align-items:flex-end}
.chat-row--system{align-self:center;max-width:95%}
.chat-who{font-size:12px;color:var(--muted,#5a4b70);margin:0 0 2px 4px}
.chat-bub{padding:8px 12px;border-radius:14px;border:2px solid #1d1230;background:var(--card,#fff);overflow-wrap:anywhere}
.chat-row--user .chat-bub{background:#ffd23f;color:#1d1230}
.chat-row--staff .chat-bub{background:#d9f5e3;color:#0d3b20}
.chat-row--system .chat-bub{background:transparent;border-style:dashed;font-size:13px;color:var(--muted,#5a4b70);text-align:center}
.chat-typing .chat-bub{opacity:.7;font-style:italic}
.chat-cta{display:inline-block;margin:4px 0;padding:4px 12px;border:2px solid #1d1230;border-radius:999px;background:#ffd23f;color:#1d1230!important;font-weight:700;text-decoration:none}
.chat-tools{display:flex;justify-content:space-between;padding:4px 12px;font-size:13px}
.chat-form{display:flex;gap:8px;padding:8px 10px 10px;border-top:2px solid rgba(128,128,128,.3)}
.chat-form textarea{flex:1;min-height:44px;max-height:120px;resize:none}
.chat-log{display:grid;gap:8px;margin:0 0 16px}
.chat-m{background:var(--card);border:2px solid var(--line);border-radius:10px;padding:8px 12px}
.chat-m--user{border-color:#c26a00}.chat-m--staff{border-color:var(--ok)}.chat-m--system{border-style:dashed;opacity:.8}
@media(max-width:600px){.chat-btn__t{display:none}.chat-btn{padding:12px}}

/* bản 2: menu gọn trên điện thoại, nút sáng/tối trong menu, markdown, bài tập */
.theme-btn--nav{position:static;width:36px;height:36px;font-size:16px;box-shadow:none;border-width:2px;margin-left:4px}
.theme-slot{display:inline-flex}
select{max-width:100%}
.row label{min-width:0;max-width:100%}
.chat-form textarea{font:inherit}
.md h3,.md h4,.md h5,.md h6{margin:12px 0 6px}.md p{margin:0 0 8px}.md ul{margin:0 0 10px;padding-left:22px}
.md-check{list-style:none;padding-left:4px!important}.md code{background:#0002;padding:1px 5px;border-radius:5px}
.ex-ch{margin:18px 0 6px}
.ex-list{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.ex-list a{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 14px;background:var(--card);border:2px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink)}
.ex-st{font-size:12px;font-weight:700;border-radius:999px;padding:2px 10px;white-space:nowrap;border:2px solid var(--line)}
.ex-st--none{opacity:.6}.ex-st--ok{background:#d9f5e3;color:#0d3b20}.ex-st--no{background:#ffe0d9;color:#5a1208}.ex-st--wait{background:#ffd23f;color:#1d1230}
.hub{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));margin:0 0 20px}
.hub .card h3{margin-top:0}
.lead-form{display:grid;gap:6px;padding:10px;border:2px dashed var(--line);border-radius:12px;margin:4px 0}
.lead-form input{min-height:38px;padding:6px 8px}
.lead-form label{display:flex;gap:6px;font-size:13px;align-items:flex-start}
.chat-chips{display:flex;flex-wrap:wrap;gap:6px;padding:0 12px 6px}
.chat-chips button{border:2px solid #1d1230;background:var(--card,#fff);color:var(--ink,#1d1230);border-radius:999px;padding:4px 10px;font:600 13px/1.3 inherit;cursor:pointer}
.ctx{font-size:14px}.ctx dt{color:var(--muted)}.ctx dd{margin:0 0 6px;font-weight:600}
.chat-grid{display:grid;gap:16px}@media(min-width:900px){.chat-grid{grid-template-columns:1fr 280px}}
@media(max-width:700px){
  .nav__in{padding:6px 12px;gap:4px}
  .menu-h{flex-wrap:nowrap;overflow-x:auto;width:100%;gap:4px 14px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .menu-h::-webkit-scrollbar{display:none}
  .menu-h a,.menu-h .linkbtn{white-space:nowrap;min-height:36px;padding:4px 0}
  .cm-cats,.cm-tabs{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
  .cm-cats a,.cm-tabs a{white-space:nowrap}
  main.wrap{padding-bottom:90px}
}
.lead-send{justify-self:start;border:2px solid #1d1230;background:#ffd23f;color:#1d1230;border-radius:999px;padding:6px 16px;font:700 14px/1.2 inherit;cursor:pointer}

/* quản trị bản 2 */
.admin-tabs a[aria-current="page"]{color:var(--brand2);text-decoration:underline;text-underline-offset:4px}
.admin-2col{display:grid;gap:16px}@media(min-width:960px){.admin-2col{grid-template-columns:1fr 1fr}}
.chart{width:100%;height:auto;display:block}
.chart-bar{fill:var(--brand)}.chart-bar:hover{fill:var(--brand2)}
.chart-lbl{fill:var(--muted);font-size:11px}
.show-sm{display:none}
.tbl--users{display:table}
@media(max-width:700px){
  .admin-tabs{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;white-space:nowrap}
  .admin-tabs::-webkit-scrollbar{display:none}
  .hide-sm{display:none}.show-sm{display:inline}
  .tbl--users td,.tbl--users th{padding:8px 6px}
}
.chat-dots{display:inline-flex;gap:5px;align-items:center;padding:12px 14px}
.chat-dots span{width:8px;height:8px;border-radius:50%;background:currentColor;opacity:.35;animation:chatdot 1.2s infinite ease-in-out}
.chat-dots span:nth-child(2){animation-delay:.2s}.chat-dots span:nth-child(3){animation-delay:.4s}
@keyframes chatdot{0%,60%,100%{opacity:.25;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}
@media (prefers-reduced-motion:reduce){.chat-dots span{animation:none;opacity:.6}}
.chat-typing .chat-bub{font-style:normal;opacity:1}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0}.kv dt{color:var(--muted)}.kv dd{margin:0;font-weight:600;overflow-wrap:anywhere}
@media(max-width:520px){.kv{grid-template-columns:1fr;gap:0}.kv dd{margin-bottom:8px}}
.cm-cats a[aria-current="page"]{background:var(--gold);color:#1d1230}

/* ô mật khẩu có nút con mắt */
.pw-wrap{position:relative;display:block}
.pw-wrap input{width:100%;padding-right:48px}
.pw-eye{position:absolute;right:4px;top:50%;transform:translateY(-50%);width:40px;height:40px;border:0;background:transparent;color:inherit;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;opacity:.75}
.pw-eye:hover,.pw-eye:focus-visible{opacity:1;background:rgba(128,128,128,.15)}
.pw-eye svg{width:22px;height:22px;fill:currentColor}
/* nút Google */
.btn-google{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;min-height:48px;padding:8px 16px;border:2px solid #1d1230;border-radius:999px;background:#fff;color:#1d1230;font-weight:700;text-decoration:none;box-shadow:3px 3px 0 #1d1230;margin:8px 0 6px}
.btn-google:hover{transform:translate(-1px,-1px)}
.g-logo{width:22px;height:22px}
.g-note{font-size:12px;margin:0 0 10px}
.or-line{display:flex;align-items:center;gap:10px;margin:6px 0 12px;font-size:13px;opacity:.75}
.or-line::before,.or-line::after{content:"";flex:1;border-top:1px solid currentColor;opacity:.4}

/* phễu Free → PRO */
.btn--pro{background:linear-gradient(135deg,#ffd23f,#ff9f1c);color:#1d1230}
.menu-h a.btn--pro{color:#1d1230}
.hero--pro{text-align:center}
.eyebrow-pro{display:inline-block;background:var(--gold);color:#1d1230;border-radius:999px;padding:2px 12px;font-weight:800;margin:0 0 8px}
.pro-nth{font-size:18px}.pro-seats{font-size:16px;color:#ffe9a8}
.hero--pro .cta-row{justify-content:center}
.ladder{margin:16px 0}
.ladder__track{height:12px;background:#0003;border-radius:8px;overflow:hidden;border:2px solid var(--line)}
.ladder__fill{display:block;height:100%;background:linear-gradient(90deg,#1f8a4c,#ffd23f)}
.ladder__fill.w0{width:2%}.ladder__fill.w5{width:5%}.ladder__fill.w10{width:10%}.ladder__fill.w15{width:15%}.ladder__fill.w20{width:20%}.ladder__fill.w25{width:25%}.ladder__fill.w30{width:30%}.ladder__fill.w35{width:35%}.ladder__fill.w40{width:40%}.ladder__fill.w45{width:45%}.ladder__fill.w50{width:50%}.ladder__fill.w55{width:55%}.ladder__fill.w60{width:60%}.ladder__fill.w65{width:65%}.ladder__fill.w70{width:70%}.ladder__fill.w75{width:75%}.ladder__fill.w80{width:80%}.ladder__fill.w85{width:85%}.ladder__fill.w90{width:90%}.ladder__fill.w95{width:95%}.ladder__fill.w100{width:100%}
.ladder__marks{list-style:none;padding:0;margin:10px 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:8px}
.ladder__marks li{border:2px solid var(--line);border-radius:12px;padding:8px 10px;background:var(--card);opacity:.75}
.ladder__marks li b{display:block;font-size:18px}.ladder__marks li span{font-size:13px;color:var(--muted)}
.ladder__marks li.is-now{opacity:1;border-color:var(--brand2);box-shadow:3px 3px 0 var(--brand2)}
.ladder__marks li.is-past{opacity:.45;text-decoration:line-through}
.tbl--cmp td:first-child{font-weight:600}.tbl--cmp th:last-child,.tbl--cmp td:last-child{background:rgba(255,210,63,.12)}
.locked-card{text-align:center}.lock-ico{font-size:44px;margin:0}
.lessons li.is-locked a{opacity:.6}
.free-bar{border-color:var(--gold)}.free-bar p{margin:0 0 6px}
.card--pro{border-color:var(--gold)}
.chart-line{fill:none;stroke:var(--brand2);stroke-width:3}
.pro-save{font-weight:700;color:#d9f5e3}.pro-best{display:inline-block;background:#1f8a4c;color:#fff;border-radius:999px;padding:2px 12px;font-weight:700}
/* trang nâng cấp: tương phản trên nền tím */
.hero--pro .price--big{color:#ffd23f}
.hero--pro .listp{color:#e8dcff;opacity:.85}
.hero--pro .muted{color:#e8dcff}
.hero--pro .pro-save{color:#b9f6c9}
.hero--pro h1{overflow-wrap:anywhere}
/* trang học: điều hướng bài + lời chào */
.lesson-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:0 0 14px}
.lesson-nav{display:flex;justify-content:space-between;gap:10px;align-items:center;border-top:2px dashed rgba(128,128,128,.4);padding-top:14px;margin-top:6px}
.welcome{border-color:var(--gold)}.welcome h2{margin-top:0}
.order-pending{border-color:var(--gold);box-shadow:4px 4px 0 var(--gold)}.order-pending h2{margin-top:0}