/* /course — the observing slip */
.cs-hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(28px,5vw,72px);align-items:center;
  padding:clamp(36px,6vw,80px) var(--pad) clamp(40px,6vw,88px) max(var(--pad),calc((100% - var(--wrap)) / 2));
  background:linear-gradient(90deg,var(--bg) 0%,var(--bg) 52%,var(--bg-2) 52%);border-bottom:1px solid var(--line)}
.cs-crumbs{font-size:.92rem;color:var(--muted);margin-bottom:20px}
.cs-crumbs a{display:inline-flex;align-items:center;min-height:44px}
.cs-code,.cs-slip__tag,.cs-log__unit,.cs-pair__code{font:500 .8rem/1.4 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--teal)}
.cs-code{margin:0 0 18px}
.cs-quote{font:400 clamp(1.5rem,3vw,2.35rem)/1.25 var(--font-head);font-style:italic;color:var(--text);max-width:24ch;margin:0 0 26px;padding-left:18px;border-left:2px solid var(--coral)}
.cs-hero h1{font-size:clamp(1.9rem,3.6vw,3rem);max-width:22ch}
.cs-summary{max-width:60ch;color:var(--muted);font-size:1.08rem;margin:0}
.cs-hero__eye{display:flex;justify-content:center;padding:16px}
.cs-eye{max-width:460px}

.cs-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;grid-template-areas:"main slip";gap:clamp(32px,5vw,72px);padding-block:clamp(44px,6vw,88px)}
.cs-main{grid-area:main;min-width:0}
.cs-slip{grid-area:slip;min-width:0}
.cs-slip__in{position:sticky;top:calc(var(--hd-h) + 20px);padding:24px;background:var(--panel);border:1px solid var(--line-2);border-radius:var(--r);
  background-image:repeating-linear-gradient(0deg,transparent 0 31px,var(--line) 31px 32px)}
.cs-slip__tag{margin:0 0 10px;padding-bottom:10px;border-bottom:1px dashed var(--line-2);word-break:break-word}
.cs-slip__price{font:500 2.4rem/1.1 var(--font-mono);font-variant-numeric:tabular-nums;color:var(--gold);margin:6px 0 4px}
.cs-slip__value{color:var(--muted);font-size:.95rem;margin:0 0 6px}
.cs-slip__buy{display:grid;gap:10px;margin:16px 0 20px}
.cs-slip__buy .add-form,.cs-slip__buy .btn{width:100%}
.cs-slip__dl{margin:0 0 16px;display:grid;gap:0}
.cs-slip__dl > div{display:grid;grid-template-columns:72px 1fr;gap:10px;padding:8px 0;border-top:1px solid var(--line)}
.cs-slip__dl dt{font:500 .78rem/1.6 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.cs-slip__dl dd{margin:0;font-size:.95rem}
.cs-slip__kit ul{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none}
.cs-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.cs-slip__note{font-size:.88rem;color:var(--muted);margin:0}

.cs-sec{padding-bottom:clamp(36px,5vw,56px);margin-bottom:clamp(36px,5vw,56px);border-bottom:1px solid var(--line)}
.cs-sec:last-child{border-bottom:0;margin-bottom:0}
.cs-sec h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}

.cs-outcomes{list-style:none;padding:0;margin:0;display:grid;gap:18px;max-width:66ch}
.cs-outcomes li{display:grid;grid-template-columns:3.2rem 1fr;gap:12px;align-items:baseline;font-size:1.08rem}
.cs-outcomes__n{font:600 2rem/1 var(--font-head);color:var(--gold)}

.cs-log{list-style:none;padding:0;margin:0;border-left:2px solid var(--gold);max-width:760px}
.cs-log__row{position:relative;display:grid;grid-template-columns:96px minmax(0,1fr) auto;gap:4px 16px;align-items:baseline;padding:14px 0 14px 22px;border-bottom:1px solid var(--line)}
.cs-log__row::before{content:"";position:absolute;left:-7px;top:21px;width:12px;height:12px;border-radius:50%;background:var(--bg);border:2px solid var(--gold)}
.cs-log__title{font-weight:500}
.cs-log__meta{font:400 .85rem var(--font-mono);font-variant-numeric:tabular-nums;color:var(--muted);text-align:right;white-space:nowrap}
.cs-log__price{grid-column:3;font:500 .95rem var(--font-mono);font-variant-numeric:tabular-nums;color:var(--gold);text-align:right}
.cs-sum{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:24px 0 0;max-width:760px}
.cs-sum > div{padding:14px 16px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r)}
.cs-sum dt{font:500 .78rem/1.4 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.cs-sum dd{margin:4px 0 0;font:500 1.3rem var(--font-mono);font-variant-numeric:tabular-nums}
.cs-sum s{color:var(--muted)}
.cs-sum__save{border-color:var(--gold)!important}
.cs-sum__save dd{color:var(--gold)}

.cs-check{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 28px}
.cs-check li{position:relative;padding-left:30px}
.cs-check li::before{content:"";position:absolute;left:2px;top:.35em;width:8px;height:14px;border:solid var(--gold);border-width:0 2px 2px 0;transform:rotate(45deg)}
.cs-for{max-width:62ch;font-size:1.1rem}

.cs-faq{border-top:1px solid var(--line);max-width:68ch}
.cs-faq:last-of-type{border-bottom:1px solid var(--line)}
.cs-faq summary{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:56px;padding:10px 0;cursor:pointer;font-weight:700;list-style:none}
.cs-faq summary::-webkit-details-marker{display:none}
.cs-faq summary::after{content:"+";font:400 1.4rem/1 var(--font-mono);color:var(--gold)}
.cs-faq[open] summary::after{content:"\2212"}
.cs-faq p{color:var(--muted);margin:0 0 18px}

.cs-pairs{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.cs-pair img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.cs-pair__body{padding:16px 18px 18px}
.cs-pair__code{margin:0 0 6px}
.cs-pair h3{font-size:1.15rem;margin:0 0 8px}
.cs-pair h3 a{text-decoration:none}
.cs-pair h3 a::after{content:"";position:absolute;inset:0}
.cs-pair__meta{margin:0;font:400 .85rem var(--font-mono);font-variant-numeric:tabular-nums;color:var(--muted)}
.cs-pair__price{color:var(--gold)}

@media (max-width:900px){
  .cs-hero{grid-template-columns:minmax(0,1fr);background:var(--bg);padding-inline:var(--pad)}
  .cs-hero__eye{order:-1}
  .cs-eye{max-width:300px}
  .cs-layout{grid-template-columns:minmax(0,1fr);grid-template-areas:"slip" "main"}
  .cs-slip__in{position:static}
}
@media (max-width:600px){
  .cs-check,.cs-pairs,.cs-sum{grid-template-columns:minmax(0,1fr)}
  .cs-log__row{grid-template-columns:minmax(0,1fr) auto}
  .cs-log__unit{grid-column:1 / -1}
  .cs-log__price{grid-column:2}
  .cs-log__meta{grid-column:1;text-align:left}
}