.app{display:grid;grid-template-columns:280px 1fr;gap:56px;padding:70px 24px 100px}
.side{position:sticky;top:96px;align-self:start}.side ol{list-style:none;padding:0;margin:16px 0 0}.side li{margin:0 0 6px}
.side a,.side span.lk{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;text-decoration:none;font-size:.92rem;color:#4a4d54;border-left:2px solid transparent;line-height:1.4}
.side a:hover{color:var(--dark);background:#efeadf}.side a[aria-current=page]{border-left-color:var(--gold);background:#efeadf;color:var(--dark);font-weight:600}
.side .n{color:var(--gold);font-weight:600;min-width:22px}.side .lk{opacity:.55;cursor:not-allowed}.side .st{margin-left:auto;font-size:.8rem}
.prog{margin:0 0 6px}.prog b{font-size:.85rem;font-weight:600;color:#4a4d54}.prog .bar{height:4px;background:#e2ddd1;margin-top:8px}.prog i{display:block;height:100%;background:var(--gold);width:0;transition:width .6s}
.lesson h2{margin-top:8px}.lesson>p,.lesson .intro p{font-size:1.08rem;color:#4a4d54}.lesson h3{font-size:1.55rem;margin:40px 0 12px}
.lesson ol li,.lesson ul li{margin:0 0 8px;color:#3d4047}
.ex{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.ex div{background:#fff;border:1px solid #e2ddd1;padding:20px}.ex strong{display:block;font-family:"Cormorant Garamond",serif;font-size:1.3rem;font-weight:600;margin-bottom:6px;line-height:1.2}.ex p{margin:0;color:#4a4d54;font-size:.96rem}
.mist li::marker{content:"✕  ";color:#b0503f}
.walk{background:var(--ink);color:#e9e5dc;padding:30px 32px}.walk h3{color:var(--txt);margin-top:0}.walk ol li{color:#d6d3cc}
.pr{background:var(--ink);color:#e9e5dc;padding:18px 22px;margin:0 0 12px;border-left:2px solid var(--gold);font-size:.95rem}
.exr{border:1px dashed var(--gold);padding:22px 24px;background:#fbf8f1}
.take{background:#efeadf;padding:22px 28px}.take li{font-weight:500}
.ck{list-style:none;padding:0}.ck label{display:flex;gap:10px;align-items:flex-start;cursor:pointer;text-transform:none;letter-spacing:0;font-size:1rem;color:#3d4047}.ck input{width:20px;height:20px;margin:3px 0 0;accent-color:#b8964f;flex:none}
.box{background:#fff;border:1px solid #e2ddd1;padding:28px;margin:34px 0}
.pbx textarea{min-height:120px;background:var(--paper)}.ok{color:#2f6a22;font-size:.92rem}
.quiz fieldset{border:0;padding:0;margin:0 0 26px}.quiz legend{font-weight:600;margin-bottom:10px;font-size:1.02rem}
.opt{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;margin:0 0 8px;background:var(--paper);border:1px solid #d8d3c8;cursor:pointer;text-transform:none;letter-spacing:0;font-size:1rem;color:var(--dark)}
.opt input{margin:4px 0 0;accent-color:#b8964f;flex:none}.opt:hover{border-color:var(--gold)}.opt.right{background:#e6f2e2;border-color:#4f8a3c}.opt.wrong{background:#f6e3e0;border-color:#b0503f}
.expl{font-size:.95rem;margin:4px 0 0}.expl.y{color:#2f6a22}.expl.n{color:#9a3b2c}
.score{padding:22px 24px;margin:0 0 24px;border-left:3px solid}.score.pass{background:#e6f2e2;border-color:#4f8a3c}.score.fail{background:#f6e3e0;border-color:#b0503f}.score strong{font-family:"Cormorant Garamond",serif;font-size:1.7rem;display:block;font-weight:600}
.msg{color:#9a3b2c;font-size:.95rem}
.lnav{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-top:30px}.btn[disabled]{opacity:.45;cursor:not-allowed}
.lockd{background:var(--ink2);color:var(--txt);padding:44px;text-align:center}.lockd p{color:var(--mut)}
.banner{background:var(--ink);color:var(--txt);border-left:3px solid var(--gold);padding:16px 22px;margin:0 0 26px}
.acc{font-size:.82rem;color:#6c6f76;margin-top:22px;word-break:normal}
.cert-wrap canvas{width:100%;height:auto;box-shadow:0 20px 50px rgba(0,0,0,.18);display:block}.cert-actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}
.print-only{display:none}
@media(max-width:900px){.app{grid-template-columns:1fr;gap:30px;padding:44px 20px 80px}.side{position:static}.side ol{display:grid;grid-template-columns:1fr;gap:0}.walk{padding:24px 20px}.box{padding:20px}.lnav .btn{width:100%;text-align:center}}
@media print{body.pc>*:not(.print-only){display:none!important}body.pc .print-only{display:block!important}body.pc .print-only img{width:100%}@page{size:landscape;margin:0}}
.buy{background:var(--ink);color:var(--txt);padding:30px;text-align:center}.buy .pz{font-family:'Cormorant Garamond',serif;font-size:3.4rem;color:var(--gold);line-height:1}.buy p{color:var(--mut);font-size:.92rem}.buy .btn{width:100%;padding:15px 10px}.buy .q{margin:8px 0}.buy .q a{color:var(--gold)}
.done{background:var(--ink2);color:var(--txt);padding:44px;text-align:center}.done p{color:var(--mut)}.done .buy{max-width:400px;margin:20px auto 0;background:none;padding:0}
.ll{padding-left:1.2em}.ll li{margin:0 0 14px}.ll span{color:#6c6f76;font-size:.95rem}.fr{font-size:.65rem;letter-spacing:.14em;text-transform:uppercase;background:var(--gold);color:var(--ink);padding:2px 8px;margin-left:6px}
code{background:#efeadf;padding:1px 5px;font-size:.9em}
.opt input,.ck input{width:18px!important;height:18px;padding:0!important;margin:4px 0 0!important}.ck li:before{content:none!important}
.side .acc a{display:inline;padding:0;border:0;background:none;color:var(--dark);text-decoration:underline;font-size:inherit}
.side details summary{cursor:pointer;list-style:none;font-size:.75rem;letter-spacing:.28em;text-transform:uppercase;color:var(--gold);font-weight:600;margin-top:22px}.side details summary::-webkit-details-marker{display:none}
@media(max-width:900px){.side details summary:after{content:" ▾"}.side details[open] summary:after{content:" ▴"}}
.nw{white-space:nowrap}.acc,.side,.lesson,.quiz{word-break:normal;overflow-wrap:normal;hyphens:manual}
.code{display:block;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.8rem;background:#fff;border:1px solid #d8d3c8;padding:10px 12px;margin:6px 0 10px;overflow-wrap:anywhere;word-break:normal;color:var(--dark);user-select:all}
.side .cpy{padding:8px 14px;font-size:.68rem;color:var(--dark)!important;border-color:var(--gold)!important}.acc p{margin:0 0 4px}