.explainer {
  padding-top: 58px;
}

.explain-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  border: 1px solid var(--line);
  background: var(--line);
}

.explain-grid article {
  min-width: 0;
  padding: 22px;
  background: #091723;
}

.explain-grid span,
.project dt {
  color: var(--accent2);
  font-size: .78rem;
  font-weight: 800;
}

.explain-grid h3 {
  margin-top: 16px;
  font-size: 1.05rem;
}

.explain-grid p,
.project-summary {
  color: var(--muted);
}

.explain-grid p {
  margin: 9px 0 0;
  font-size: .9rem;
}

.status-guide {
  display: flex;
  align-items: center;
  gap: 14px 22px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding: 15px 17px;
  border-left: 3px solid var(--accent);
  background: #0a1724;
  color: var(--muted);
  font-size: .84rem;
}

.status-guide strong {
  color: var(--text);
}

.status-guide span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.dot.building { background: #7ab7e8; }
.dot.research { background: var(--accent2); }
.dot.experimental { background: #e77862; }

.project {
  min-height: 390px;
}

.project-summary {
  margin: 13px 0 19px;
}

.project dl {
  display: grid;
  gap: 11px;
  margin: 0 0 22px;
}

.project dl div {
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.project dt {
  color: var(--accent);
  font-size: .72rem;
  text-transform: uppercase;
}

.project dd {
  margin: 3px 0 0;
  color: #d8e5ea;
  font-size: .86rem;
}

.project footer {
  gap: 14px;
}

.project footer a {
  text-align: right;
}

@media (max-width: 920px) {
  .explain-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .explain-grid { grid-template-columns: 1fr; }
  .status-guide { display: grid; }
  .project { min-height: 0; }
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 30px;
}

.lab-tool {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
}

.lab-tool.compact-tool {
  grid-column: 1 / -1;
}

.lab-tool header {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.lab-tool header > span {
  color: var(--accent2);
  font-size: .78rem;
  font-weight: 800;
}

.lab-tool header p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: .88rem;
}

.lab-tool label:not(.file-picker) {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 800;
}

.lab-tool textarea {
  width: 100%;
  min-height: 190px;
  resize: vertical;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 5px;
  outline: none;
  background: #06131e;
  color: var(--text);
  font: .84rem/1.55 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.lab-tool textarea:focus,
.file-picker:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(81, 197, 170, .16);
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tool-result {
  display: block;
  min-height: 43px;
  margin-top: 12px;
  padding: 11px 12px;
  overflow-wrap: anywhere;
  border-left: 3px solid var(--line);
  background: #071620;
  color: var(--muted);
  font-size: .8rem;
}

.tool-result[data-state="success"] { border-left-color: var(--accent); color: #b7eadf; }
.tool-result[data-state="error"] { border-left-color: #e77862; color: #ffc7bc; }

.file-picker {
  display: grid;
  place-items: center;
  min-height: 190px;
  padding: 24px;
  border: 1px dashed #4b7181;
  border-radius: 6px;
  background: #06131e;
  text-align: center;
  cursor: pointer;
}

.file-picker strong,
.file-picker small { display: block; }
.file-picker strong { color: var(--accent); }
.file-picker small { max-width: 100%; margin-top: 6px; overflow-wrap: anywhere; color: var(--muted); }
.file-picker input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.hash-result { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.privacy-note { margin: 15px 0 0; color: var(--muted); font-size: .82rem; }
.privacy-note strong { color: var(--text); }

@media (max-width: 760px) {
  .tool-grid { grid-template-columns: 1fr; }
  .lab-tool.compact-tool { grid-column: auto; }
}

@media (max-width: 520px) {
  .lab-tool { padding: 17px; }
  .tool-actions .button { flex: 1 1 100%; }
  .tool-actions .icon-button { flex: 1; }
  .utility-row { display: grid; grid-template-columns: 1fr 1fr; }
  .utility-row output { grid-column: 1 / -1; }
}