/* Labs reader - layers on the Control Room shell (exam-v2.css). Rail + workspace,
   flat surfaces, petrol accent, no new gradients. Only lab-specific pieces here. */

/* ---- Rail: pack sub-label + lab list (styled like the question navigator) ---- */
.cr-pack-sub {
  font-size: 0.72rem;
  color: var(--rail-text);
  opacity: 0.8;
}

.labs-nav {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.labs-nav-group-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--rail-text);
  opacity: 0.6;
  margin: 0.5rem 0 0.1rem;
}
.labs-nav-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  text-align: left;
  border: 1px solid var(--rail-line);
  background: transparent;
  color: var(--rail-text);
  border-radius: 7px;
  padding: 0.5rem 0.6rem;
  font: inherit;
  font-size: 0.8125rem;
  line-height: 1.3;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.labs-nav-item:hover { border-color: var(--accent-bright); color: var(--rail-text-strong); }
.labs-nav-item:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 1px; }
.labs-nav-item.active {
  background: var(--rail-bg-soft);
  border-color: var(--accent-bright);
  color: var(--rail-text-strong);
  font-weight: 600;
}
.labs-nav-item .labs-nav-index {
  font-family: var(--font-num);
  font-size: 0.7rem;
  flex: 0 0 auto;
  width: 18px;
  text-align: center;
  opacity: 0.8;
}
.labs-nav-item .labs-nav-tick { margin-left: auto; color: var(--accent-bright); flex: 0 0 auto; }

/* ---- Workspace: lab detail ---- */
.lab-head { margin-bottom: 1.2rem; }
.lab-domain-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-tint);
  color: var(--accent-deep);
  border: 1px solid var(--accent-chip-border);
  margin-bottom: 0.6rem;
}
.lab-title { font-size: 1.35rem; font-weight: 700; line-height: 1.25; margin-bottom: 0.5rem; }
.lab-objective { color: var(--text-soft); }

.lab-cost-note {
  display: flex;
  gap: 0.6rem;
  margin-top: 1rem;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius);
  background: var(--flag-tint);
  border: 1px solid var(--flag-line);
  color: var(--text-soft);
  font-size: 0.875rem;
}
.lab-cost-note i { color: var(--flag); margin-top: 0.15rem; }

.lab-section { margin-top: 1.6rem; }
.lab-section-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 0.7rem;
}
.lab-list { margin: 0; padding-left: 1.2rem; color: var(--text-soft); }
.lab-list li { margin-bottom: 0.4rem; }

/* steps - mirror the calm numbered look of the exam content */
.lab-steps { list-style: none; margin: 0; padding: 0; counter-reset: labstep; }
.lab-step {
  position: relative;
  border-left: 2px solid var(--line-strong);
  padding: 0 0 1.1rem 1.1rem;
}
.lab-step:last-child { padding-bottom: 0; }
.lab-step::before {
  counter-increment: labstep;
  content: counter(labstep);
  position: absolute;
  left: -0.8rem;
  top: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--btn-primary-text);
  font-family: var(--font-num);
  font-size: 0.75rem;
  font-weight: 600;
}
.lab-step-instruction { color: var(--text); margin-bottom: 0.4rem; }
.lab-step-expected {
  color: var(--text-soft);
  font-size: 0.875rem;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.45rem 0.65rem;
}
.lab-step-expected::before { content: "Expected: "; color: var(--text-faint); font-weight: 600; }
.lab-step-image { max-width: 100%; border-radius: var(--radius); margin-top: 0.6rem; border: 1px solid var(--line); }
.lab-image-missing { color: var(--text-faint); font-size: 0.85rem; font-style: italic; margin-top: 0.4rem; }

.lab-detail code {
  font-family: var(--font-num);
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.05rem 0.4rem;
  font-size: 0.85em;
  overflow-wrap: anywhere;
}

.lab-cleanup {
  background: var(--accent-tint);
  border: 1px solid var(--accent-chip-border);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
}
.lab-cleanup .lab-section-title { color: var(--accent-deep); margin-top: 0; }

.lab-refs a { color: var(--accent); }
.lab-refs a:hover { color: var(--accent-deep); }

.lab-actions {
  margin-top: 1.8rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.lab-done-state {
  color: var(--good);
  font-weight: 600;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.labs-empty {
  text-align: center;
  padding: 3.5rem 1rem;
  color: var(--text-soft);
}
.labs-empty .btn { margin-top: 1rem; }

/* On small screens the rail collapses (exam-v2 handles .cr-rail);
   keep the lab list full-width and readable there. */
@media (max-width: 760px) {
  .labs-nav { flex: 1 1 100%; order: 4; }
  .cr-pack-sub { display: none; }
}