.str-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

@media (max-width: 900px) {
  .str-layout { grid-template-columns: 1fr; }
}

.idea-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 0.55rem;
  margin-bottom: 0.75rem;
}

@media (max-width: 900px) {
  .idea-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .idea-grid { grid-template-columns: 1fr; }
}

.idea-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  background: var(--surface2);
  font-size: 0.88rem;
}

.idea-card h3 {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
}

.str-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  align-items: end;
  margin-bottom: 0.85rem;
}

.str-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.str-field label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.str-field select {
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  min-width: 10rem;
}

.spec-box {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem;
  background: var(--surface2);
  font-size: 0.88rem;
  margin-bottom: 0.75rem;
}

.spec-box h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.spec-box ul {
  margin: 0;
  padding-left: 1.1rem;
}

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.checklist li {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.88rem;
}

.checklist li:last-child {
  border-bottom: none;
}

.checklist li.is-done {
  background: color-mix(in srgb, #15803d 8%, transparent);
}

.checklist input {
  margin-top: 0.2rem;
}

.checklist .tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  display: block;
  margin-top: 0.15rem;
}

.flag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.45rem 0 0.55rem;
}

.flag {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.flag.is-ok {
  border-color: #15803d;
  background: color-mix(in srgb, #15803d 12%, var(--surface));
}

.flag.is-on {
  border-color: #b45309;
  background: color-mix(in srgb, #b45309 12%, var(--surface));
}

.verdict {
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  margin: 0.5rem 0;
}

.verdict.yes {
  border-color: #15803d;
  background: color-mix(in srgb, #15803d 10%, var(--surface));
}

.verdict.idle {
  color: var(--muted);
}

.code-box,
.trace-box,
.log-box {
  font-family: var(--mono);
  font-size: 0.78rem;
  white-space: pre-wrap;
  margin: 0;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface2);
  max-height: 16rem;
  overflow: auto;
}

.block-list {
  font-family: var(--mono);
  font-size: 0.78rem;
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
}

.kbd-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.kbd-row button {
  font-size: 0.75rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.chal-hint {
  font-size: 0.9rem;
  color: var(--muted);
}