.cps-root{background:var(--wh-bg);flex-direction:column;flex:1;min-height:0;display:flex}.cps-player-host,.cps-root>div:last-child{flex:1;min-height:0}.cps-bar{border-bottom:1px solid var(--wh-border-light);background:var(--wh-surface);flex-shrink:0;align-items:center;padding:12px 20px;display:flex}.cps-back-btn{cursor:pointer;font-family:var(--wh-font);color:var(--wh-text);background:0 0;border:none;border-radius:8px;align-items:center;gap:4px;padding:6px 8px;font-size:13px;font-weight:600;transition:background .15s;display:inline-flex}.cps-back-btn:hover{background:color-mix(in srgb,var(--wh-text)6%,transparent)}.cps-state{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;min-height:0;padding:40px 24px;display:flex}.cps-state-text{font-family:var(--wh-font);color:var(--wh-text-muted);font-size:13px}.cps-state-icon{background:color-mix(in srgb,var(--wh-text-muted)10%,transparent);border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;margin-bottom:4px;display:flex}.cps-state-title{font-family:var(--wh-font);color:var(--wh-text);margin:0;font-size:18px;font-weight:700}.cps-state-desc{font-family:var(--wh-font);color:var(--wh-text-muted);max-width:420px;margin:0;font-size:13px;line-height:1.6}.cps-state-action{background:var(--wh-indigo);color:var(--wh-on-indigo,#fff);cursor:pointer;font-family:var(--wh-font);border:none;border-radius:10px;margin-top:8px;padding:9px 18px;font-size:13px;font-weight:600;transition:filter .15s}.cps-state-action:hover{filter:brightness(1.05)}.cps-discuss-fab{z-index:40;cursor:pointer;background:var(--wh-indigo);color:var(--wh-on-indigo,#fff);font-family:var(--wh-font);box-shadow:0 6px 18px color-mix(in srgb,var(--wh-text)22%,transparent);border:none;border-radius:999px;align-items:center;gap:8px;padding:10px 16px;font-size:13px;font-weight:600;transition:filter .15s,transform .15s;display:inline-flex;position:fixed;bottom:24px;right:24px}.cps-discuss-fab:hover{filter:brightness(1.05);transform:translateY(-1px)}.course-text-content>:first-child{margin-top:0}.course-text-content>:last-child{margin-bottom:0}.course-text-content p{margin:0 0 1em}.course-text-content h1,.course-text-content h2,.course-text-content h3{color:var(--wh-text);margin:1.6em 0 .5em;font-weight:700;line-height:1.3}.course-text-content h1{font-size:1.4em}.course-text-content h2{font-size:1.25em}.course-text-content h3{font-size:1.1em}.course-text-content ul,.course-text-content ol{margin:0 0 1em;padding-left:1.4em}.course-text-content li{margin:.3em 0}.course-text-content a{color:var(--wh-indigo);text-underline-offset:2px;text-decoration:underline}.course-text-content blockquote{border-left:3px solid var(--wh-border-light);color:var(--wh-text-muted);margin:1.2em 0;padding:.2em 0 .2em 1em;font-style:italic}.course-text-content img{border-radius:10px;max-width:100%;height:auto}.course-text-content code{background:color-mix(in srgb,var(--wh-text)7%,transparent);border-radius:6px;padding:.1em .4em;font-size:.92em}