.activity-feedback-expand {
  display: block;
  width: max-content;
  max-width: 100%;
  margin-top: 10px;
  padding: 7px 10px;
  border: 1px solid #58c7ff;
  border-radius: 6px;
  background: #123247;
  color: #e5f7ff;
  font: inherit;
  font-size: 13px;
  font-weight: 750;
  cursor: pointer;
}
.activity-feedback-expand[hidden], .activity-feedback-modal.hidden { display: none; }
.activity-feedback-expand:hover { background: #174763; }
body.activity-feedback-open { overflow: hidden; }
.activity-feedback-modal { position: fixed; z-index: 1040; inset: 0; display: grid; place-items: center; padding: 16px; }
.activity-feedback-backdrop { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: rgba(0, 0, 0, .84); backdrop-filter: blur(6px); }
.activity-feedback-dialog { position: relative; width: min(840px, 100%); max-height: min(90dvh, 800px); display: grid; grid-template-rows: auto minmax(0, 1fr); overflow: hidden; border: 1px solid rgba(88, 199, 255, .6); border-radius: 12px; background: #0e151d; box-shadow: 0 26px 90px rgba(0, 0, 0, .7); color: #f3f7fb; }
.activity-feedback-header { display: flex; justify-content: space-between; gap: 20px; padding: clamp(18px, 3vw, 28px); border-bottom: 1px solid #334052; background: #111d29; }
.activity-feedback-eyebrow { color: #58c7ff; font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.activity-feedback-heading { display: flex; align-items: center; gap: 14px; margin-top: 8px; }
.activity-feedback-avatar { flex: 0 0 48px; width: 48px; height: 48px; overflow: hidden; border: 1px solid #57728b; border-radius: 50%; background: #273341; }
.activity-feedback-avatar img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center top; transform: scale(1.6); transform-origin: 50% 0; }
.activity-feedback-header h2 { margin: 6px 0 0; color: #f5f7fb; font-size: clamp(24px, 3vw, 34px); line-height: 1.2; }
.activity-feedback-professor { display: block; margin-top: 3px; color: #b5c8d8; font-size: 13px; font-weight: 600; }
.activity-feedback-close { flex: 0 0 44px; width: 44px; height: 44px; border: 1px solid #58758e; border-radius: 8px; background: #202d3a; color: white; font-size: 30px; cursor: pointer; }
.activity-feedback-body { overflow-y: auto; padding: clamp(22px, 4vw, 40px); }
.activity-feedback-section + .activity-feedback-section { margin-top: 26px; padding-top: 24px; border-top: 1px solid #334052; }
.activity-feedback-body h3 { margin: 0 0 18px; color: #8ed8ff; font-size: clamp(18px, 2vw, 22px); }
.activity-feedback-body p { margin: 0; color: #f0f4f8; font-size: clamp(18px, 2vw, 22px); line-height: 1.65; white-space: pre-line; }
.activity-feedback-references { margin-top: 28px; padding-top: 20px; border-top: 1px solid #334052; color: #bdcbd8; font-size: 14px; line-height: 1.5; }
.activity-feedback-references summary { width: fit-content; color: #8ed8ff; font-weight: 700; cursor: pointer; }
.activity-feedback-references ol { margin: 12px 0 0; padding-left: 21px; }
.activity-feedback-references li + li { margin-top: 8px; }
.activity-feedback-references a { color: #8ed8ff; text-decoration: underline; text-underline-offset: 2px; }
@media (max-width: 600px) { .activity-feedback-modal { padding: 0; } .activity-feedback-dialog { width: 100%; height: 100dvh; max-height: none; border-radius: 0; } }