.solid-nets {
  --accent: #0b57d0;
  --accent-2: #f97316;
  --muted: #5b6472;
  --surface: #f8fafc;
  --border: #d7dbe3;
}

.solid-nets .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.solid-nets .inline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.solid-nets .input-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  align-items: end;
}

.solid-nets label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

.solid-nets .input,
.solid-nets select {
  width: 100%;
}

.solid-nets .note {
  color: var(--muted);
  font-size: 0.95rem;
}

.solid-nets .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.solid-nets .chip {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.solid-nets .chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.solid-nets .chip:hover {
  border-color: var(--accent);
}

.solid-nets .settings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.solid-nets .toggle-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
}

.solid-nets .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.solid-nets .results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.solid-nets .result-item {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.solid-nets .result-item strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.solid-nets .diagram-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.solid-nets .diagram-shell {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  padding: 10px;
}

.solid-nets .svg-wrap {
  width: 100%;
  min-height: 240px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.solid-nets svg {
  width: 100%;
  height: 100%;
}

.solid-nets .legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
  font-size: 0.95rem;
}

.solid-nets .legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.solid-nets .swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid #c5ccd8;
}

.solid-nets .face-base {
  fill: #dbeafe;
  stroke: #1d4ed8;
}

.solid-nets .face-base.secondary {
  fill: #e0f2fe;
  stroke: #0369a1;
}

.solid-nets .face-lateral {
  fill: #fef3c7;
  stroke: #d97706;
}

.solid-nets .face-extra {
  fill: #ede9fe;
  stroke: #7c3aed;
}

.solid-nets .face-outline {
  fill: none;
  stroke: #94a3b8;
}

.solid-nets [data-face] {
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease, stroke-width 0.2s ease;
}

.solid-nets [data-face].is-hover {
  opacity: 0.9;
  transform: scale(1.01);
  stroke-width: 2.2px;
}

.solid-nets table {
  width: 100%;
  border-collapse: collapse;
}

.solid-nets th,
.solid-nets td {
  border-bottom: 1px solid var(--border);
  padding: 8px 6px;
  text-align: left;
}

.solid-nets tbody tr:hover {
  background: #f8fafc;
}

.solid-nets .step-list {
  display: grid;
  gap: 10px;
}

.solid-nets .step {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  background: #fff;
}

.solid-nets .step h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.solid-nets .code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.95rem;
}

.solid-nets .cta-block {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.solid-nets .status {
  font-weight: 600;
  color: #b91c1c;
}

.solid-nets .status.ok {
  color: #15803d;
}

.solid-nets.teacher-mode .result-item strong,
.solid-nets.teacher-mode h2,
.solid-nets.teacher-mode h3,
.teacher-mode .solid-nets .result-item strong,
.teacher-mode .solid-nets h2,
.teacher-mode .solid-nets h3 {
  font-size: 1.1em;
}

.solid-nets.teacher-mode .svg-wrap,
.teacher-mode .solid-nets .svg-wrap {
  min-height: 280px;
}

.solid-nets .muted-bg {
  background: #f1f5f9;
  border-radius: 10px;
  padding: 8px 10px;
}

.solid-nets .pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  background: #e2e8f0;
  font-size: 0.9rem;
}

.solid-nets .pill strong {
  color: #0f172a;
}

.solid-nets .badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 8px;
  background: #dbeafe;
  color: #1e3a8a;
  font-weight: 600;
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .solid-nets .actions {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .solid-nets [data-face] {
    transition: none;
  }
}

.reduced-motion .solid-nets [data-face],
.solid-nets.reduced-motion [data-face] {
  transition: none;
}