.activity-preview{position:fixed;left:24px;bottom:24px;z-index:80;width:370px;max-width:calc(100vw - 32px);padding:16px 20px 12px;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:16px;box-shadow:0 12px 42px #102c521c;font-size:14px;line-height:1.5;max-height:calc(100dvh - 48px);overflow:auto}
.activity-preview[hidden],.activity-preview [hidden]{display:none!important}
.activity-preview-header{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:11px;letter-spacing:.08em;text-transform:uppercase}
.activity-preview button{border:0;background:transparent;color:inherit;min-width:44px;min-height:44px;padding:8px;border-radius:8px}
.activity-preview-header button{font-size:24px;margin:-12px -12px -4px 0;line-height:1}
.activity-preview-tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin:4px 0 16px;padding-bottom:8px}
.activity-preview-tabs button{padding:8px 14px;font-size:13px}
.activity-preview-tabs [aria-pressed=true]{background:var(--accent-soft);color:var(--ink);font-weight:600}
.activity-preview-author{display:flex;align-items:center;gap:10px}
.activity-preview-author>span{display:grid;place-items:center;flex-shrink:0;width:38px;height:38px;border-radius:50%;background:var(--surface);font-family:var(--font-display);font-size:22px}
.activity-preview-author strong{font-size:14px}
.activity-preview-author>.activity-preview-purchase-icon{background:var(--accent-soft);color:var(--accent)}
.activity-preview-purchase-icon svg{width:23px;height:23px}
.activity-preview .activity-preview-stars{margin:12px 0 0;gap:3px}
.activity-preview blockquote{margin:12px 0 8px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;font-size:14px}
.activity-preview footer{display:flex;align-items:center;justify-content:space-between;min-height:44px;margin-top:8px;font-size:13px}
.activity-preview footer a{padding-block:10px}
.activity-preview-course{margin:12px 0 8px;font-size:17px;font-weight:600;line-height:1.4}
.activity-preview time{font-size:12px;color:var(--muted)}
.activity-preview :is(button,a):focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media(max-width:600px){.activity-preview{left:16px;bottom:16px;width:calc(100vw - 32px);padding:12px 16px 8px}.activity-preview blockquote{-webkit-line-clamp:2}}

.social-proof{box-sizing:border-box}.social-proof .activity-preview-stars{display:flex;color:var(--accent)}.social-proof .activity-preview-stars svg{width:17px;height:17px;fill:currentColor}.social-proof .activity-preview-author p{margin:2px 0 8px}