/* ─── Core principles grid ────────────────────────────────────────────── */
.pw-principles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.1rem;
}
@media (max-width: 640px) {
  .pw-principles-grid { grid-template-columns: 1fr; }
}
.pw-principle-card {
  border-radius: 10px;
  border: 1.5px solid var(--border);
  padding: 0.85rem;
  background: var(--surface);
}
.pw-principle-card h4 {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}
.pw-principle-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}
.pw-principle-card code {
  font-family: ui-monospace, monospace;
  font-size: 0.75em;
  background: var(--bg);
  border-radius: 4px;
  padding: 0.1em 0.3em;
}

.pw-principle-card--1 { border-color: #93c5fd; background: #eff6ff; }
.pw-principle-card--1 h4 { color: #1d4ed8; }
.pw-principle-card--2 { border-color: #86efac; background: #f0fdf4; }
.pw-principle-card--2 h4 { color: #15803d; }
.pw-principle-card--3 { border-color: #fcd34d; background: #fffbeb; }
.pw-principle-card--3 h4 { color: #92400e; }
.pw-principle-card--4 { border-color: #c4b5fd; background: #f5f3ff; }
.pw-principle-card--4 h4 { color: #6d28d9; }
.pw-principle-card--5 { border-color: #fca5a5; background: #fef2f2; }
.pw-principle-card--5 h4 { color: #b91c1c; }

/* ─── Project structure file tree ─────────────────────────────────────── */
.pw-tree {
  font-family: ui-monospace, monospace;
  font-size: 0.74rem;
  line-height: 1.85;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
  margin-top: 0.9rem;
  color: var(--text-muted);
  white-space: pre;
  overflow-x: auto;
}
.pw-tree .pw-tree-dir {
  color: var(--text);
  font-weight: 700;
}
.pw-tree .pw-tree-comment {
  color: #94a3b8;
}

/* ─── Do / Don't grid ────────────────────────────────────────────────── */
.pw-dos-donts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 0;
}
.pw-dos,
.pw-donts {
  border-radius: 10px;
  border: 1.5px solid;
  padding: 0.85rem;
}
.pw-dos  { border-color: #86efac; background: #f0fdf4; }
.pw-donts { border-color: #fca5a5; background: #fef2f2; }

.pw-dos h4,
.pw-donts h4 {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}
.pw-dos h4  { color: #15803d; }
.pw-donts h4 { color: #b91c1c; }

.pw-dos ul,
.pw-donts ul {
  font-size: 0.78rem;
  line-height: 1.75;
  padding-left: 1rem;
  margin: 0;
}
.pw-dos li  { color: #166534; }
.pw-donts li { color: #991b1b; }