.challenge-layout {
  position:relative;
  left:50%;
  width:min(1240px,calc(100% + 120px));
  margin:0;
  transform:translateX(-50%)
}
.challenge-layout .challenge-card {
  margin-inline:auto
}
.activity-preview {
  position:absolute;
  top:0;
  left:0;
  width:190px;
  padding:15px 14px 13px;
  border:1px solid rgba(23,63,50,.1);
  border-radius:20px;
  background:rgba(255,253,248,.88);
  box-shadow:0 12px 36px rgba(44,59,49,.08);
  backdrop-filter:blur(10px)
}
@media(min-width:1271px) {
  .hero-registered { top:-40px }
  .activity-preview {
    top:-18px;
    left:calc((1240px - min(1280px,100vw - 64px))/2);
    width:210px;
    min-height:195px
  }
}
@media(min-width:1271px) and (max-width:1299px) {
  .challenge-layout .challenge-card { max-width:calc(100vw - 500px) }
}
.activity-preview-head {
  display:flex;
  align-items:center;
  gap:9px;
  margin-bottom:12px
}
.activity-preview-icon {
  display:grid;
  flex:none;
  place-items:center;
  width:30px;
  height:30px;
  border-radius:10px;
  color:#b9531e;
  background:#fff0dc;
  font-weight:1000
}
.activity-preview-head h2 {
  margin:0;
  color:var(--forest);
  font-size:.9rem;
  letter-spacing:-.025em
}
.activity-preview-head p {
  margin:3px 0 0;
  color:var(--muted);
  font-size:.66rem
}
.activity-preview-list,.activity-list {
  display:grid;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none
}
.activity-item {
  min-width:0;
  padding:10px 11px;
  border-radius:12px;
  color:var(--forest);
  background:#f5f0e6
}
.activity-message {
  display:block;
  font-size:.72rem;
  font-weight:850;
  line-height:1.35;
  overflow-wrap:anywhere
}
.activity-time {
  display:block;
  margin-top:4px;
  color:var(--muted);
  font-size:.65rem;
  font-variant-numeric:tabular-nums
}
.activity-empty {
  padding:9px 2px;
  color:var(--muted);
  font-size:.72rem;
  line-height:1.45
}
.activity-preview-status:empty { display:none }
.activity-preview-status {
  margin:7px 0 0;
  color:#a64e1c;
  font-size:.65rem
}
.activity-preview-link {
  display:inline-flex;
  margin-top:11px;
  color:#a64e1c;
  font-size:.7rem;
  font-weight:950;
  text-decoration:none
}
.activity-preview-link:hover,.activity-preview-link:focus-visible { text-decoration:underline; outline-offset:3px }

/* Full activity page */
.page-activity .main-nav { grid-template-columns:repeat(4,minmax(0,1fr)) }
.page-activity .main-nav .activity-nav {
  color:var(--white);
  background:var(--orange-dark);
  box-shadow:0 6px 15px rgba(217,107,32,.2)
}
.activity-hero { max-width:900px }
.activity-hero h1 { font-size:clamp(3.4rem,12vw,6.2rem) }
.activity-panel { max-width:900px; margin-inline:auto }
.activity-page-heading {
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:20px
}
.activity-page-heading h2 {
  margin:0;
  color:var(--deep);
  font-size:clamp(1.7rem,5vw,2.5rem);
  letter-spacing:-.05em
}
.activity-page-heading .kicker { margin-bottom:6px }
.activity-live-mark {
  display:inline-flex;
  align-items:center;
  gap:7px;
  flex:none;
  padding:8px 11px;
  border-radius:999px;
  color:var(--forest);
  background:#e7efe5;
  font-size:.7rem;
  font-weight:900
}
.activity-live-mark i { width:7px; height:7px; border-radius:50%; background:#5c9d67 }
.activity-list { gap:9px }
.activity-list .activity-item {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:58px;
  padding:13px 16px;
  border:1px solid rgba(23,63,50,.06);
  border-radius:15px;
  background:#f6f1e8
}
.activity-list .activity-message { font-size:.9rem }
.activity-list .activity-time { flex:none; margin:0; font-size:.76rem; text-align:right }
.activity-list .activity-empty { padding:28px 5px; text-align:center; font-size:.92rem }
.activity-page-status { min-height:0; margin:12px 0 0; color:var(--muted); font-size:.78rem }
.activity-page-status:empty { display:none }
.activity-more {
  display:block;
  min-height:46px;
  margin:18px auto 0;
  padding:10px 17px;
  border:0;
  border-radius:14px;
  color:var(--cream);
  background:var(--forest);
  font-weight:900;
  cursor:pointer
}
.activity-more:hover,.activity-more:focus-visible { background:var(--deep); outline:3px solid rgba(242,138,56,.45); outline-offset:2px }
.activity-more:disabled { opacity:.6; cursor:wait }
.activity-more[hidden] { display:none }

@media(max-width:1270px) {
  .challenge-layout { left:auto; width:auto; transform:none }
  .activity-preview {
    position:static;
    width:min(100%,820px);
    margin:16px auto 0
  }
  .activity-preview-list { grid-template-columns:repeat(2,minmax(0,1fr)) }
}
@media(max-width:700px) {
  .activity-preview { padding:14px; border-radius:18px }
  .activity-preview-list { grid-template-columns:1fr; gap:6px }
  .activity-preview .activity-item { display:flex; align-items:center; justify-content:space-between; gap:8px; padding:9px 10px }
  .activity-preview .activity-message { font-size:.72rem }
  .activity-preview .activity-time { flex:none; margin:0; text-align:right }
  .page-activity .main-nav { grid-template-columns:repeat(2,minmax(0,1fr)) }
  .activity-page-heading { align-items:flex-start }
  .activity-live-mark { font-size:.62rem }
  .activity-list .activity-item { align-items:flex-start; flex-direction:column; gap:5px; padding:12px 13px }
  .activity-list .activity-message { font-size:.84rem }
  .activity-list .activity-time { text-align:left }
}