.attempt-history {
  margin: 18px 0 26px;
}

.attempt-history h2 {
  font-size: 18px;
}

.attempt-review summary {
  cursor: pointer;
  font-weight: 750;
}

.exercise-intro {
  max-width: 920px;
  padding: 44px 0 28px;
}

.exercise-kicker,
.scenario-label,
.exercise-start > span {
  color: var(--accent);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.exercise-intro h1 {
  max-width: 760px;
  margin: 12px 0 16px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.02;
}

.exercise-lead {
  max-width: 790px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.exercise-lead strong { color: var(--text); }

.exercise-explainer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.exercise-explainer > div {
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.exercise-explainer span,
.exercise-explainer strong { display: block; }
.exercise-explainer span { margin-bottom: 7px; color: var(--muted); font-size: 10px; letter-spacing: .1em; }

.scenario-card {
  position: relative;
  overflow: hidden;
  margin: 12px 0 28px;
  padding: clamp(26px, 5vw, 48px);
  border: 1px solid #60753c;
  border-radius: 22px;
  background: radial-gradient(circle at 100% 0, rgba(174,222,95,.14), transparent 42%), #121712;
  box-shadow: 0 22px 70px rgba(0,0,0,.24);
}

.scenario-card h2 { margin: 11px 0; font-size: 28px; }
.scenario-card > p { max-width: 850px; margin: 0; font-size: clamp(19px, 2.5vw, 25px); line-height: 1.55; }
.scenario-objective { display: grid; gap: 7px; margin-top: 28px; padding-top: 22px; border-top: 1px solid rgba(174,222,95,.23); }
.scenario-objective span { color: var(--muted); font-size: 12px; }

.attempt-history {
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,.018);
}

.attempt-history > summary { cursor: pointer; color: var(--muted); font-size: 13px; font-weight: 700; }
.attempt-list { margin-top: 12px; }
.feedback-pending { color: var(--muted); font-size: 13px; }

.exercise-official-steps {
  display: grid;
  gap: 10px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
}
.exercise-official-steps li {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow-wrap: anywhere;
}
.exercise-official-steps .feedback-status b { font-size: 14px; }
.exercise-official-steps p { margin: 8px 0 0; line-height: 1.55; }

.exercise-start { max-width: 760px; padding: 36px 0 14px; }
.exercise-start h2 { margin: 9px 0; font-size: 25px; }
.exercise-start p { color: var(--muted); line-height: 1.65; }
.hint-box { padding: 17px; border: 1px dashed var(--line); border-radius: 14px; }
.exercise-submit { justify-self: start; margin-top: 8px; }
.exercise-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }

@media (max-width: 720px) {
  .exercise-explainer { grid-template-columns: 1fr; }
  .exercise-intro { padding-top: 30px; }
}