.artifact-flow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.artifact { min-height: 12rem; padding: 1.1rem; background: var(--surface); }
.artifact small { display: block; margin-bottom: 0.7rem; color: var(--accent); font-weight: 750; letter-spacing: 0.08em; text-transform: uppercase; }
.artifact p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.boundary-lab { max-width: 920px; padding: 1.5rem; border: 1px solid var(--line); background: var(--surface); }
.boundary-head { display: flex; gap: 1rem; align-items: start; justify-content: space-between; }
.boundary-head p { margin: 0; }
.boundary-head button { flex: 0 0 auto; }
.module-tree { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.7rem; margin: 1.25rem 0; padding: 1rem; border: 1px solid var(--line); background: var(--paper); }
.module { min-height: 6.6rem; padding: 0.75rem; border: 1px solid var(--line); background: white; transition: border-color 160ms ease, background 160ms ease; }
.module strong { display: block; margin-bottom: 0.25rem; font-size: 0.88rem; }
.module small { display: block; color: var(--muted); }
.module::after { display: inline-block; margin-top: 0.7rem; padding: 0.05rem 0.35rem; border: 1px solid currentColor; border-radius: 999px; content: attr(data-runtime); font-size: 0.66rem; font-weight: 750; letter-spacing: 0.06em; text-transform: uppercase; }
.module[data-runtime="client"] { border-color: var(--warm); background: var(--warm-soft); }
.module[data-runtime="client"]::after { color: var(--warm); }
.module[data-runtime="server"] { border-color: var(--accent); background: var(--accent-soft); }
.module[data-runtime="server"]::after { color: var(--accent); }
.runtime-key { display: flex; flex-wrap: wrap; gap: 0.8rem; color: var(--muted); font-size: 0.8rem; }
.key-chip::before { display: inline-block; width: 0.65rem; height: 0.65rem; margin-right: 0.35rem; border: 1px solid currentColor; content: ""; vertical-align: -0.04rem; }
.key-chip[data-key="server"]::before { color: var(--accent); background: var(--accent-soft); }
.key-chip[data-key="client"]::before { color: var(--warm); background: var(--warm-soft); }
.boundary-result { margin: 1rem 0 0; padding: 0.9rem 1rem; border-left: 0.3rem solid var(--accent); background: var(--code); }
.boundary-result p { margin: 0; }
.boundary-result p + p { margin-top: 0.35rem; }
.boundary-result [data-boundary-warning] { color: var(--warm); }
.myth-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.myth { padding: 1rem 1.1rem; border: 1px solid var(--line); background: var(--surface); }
.myth h3 { margin-bottom: 0.4rem; }
.myth p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.boundary-code { max-width: 920px; overflow-x: auto; margin: 1rem 0; padding: 1rem; background: var(--ink); color: var(--surface); font-size: 0.82rem; line-height: 1.55; }
.boundary-code code { padding: 0; background: transparent; }
@media (max-width: 760px) {
  .artifact-flow { grid-template-columns: 1fr; }
  .module-tree { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .module-tree, .myth-grid { grid-template-columns: 1fr; }
  .boundary-head { display: block; }
  .boundary-head button { width: 100%; margin-top: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  .module { transition: none; }
}
@media print {
  .artifact, .module, .myth { break-inside: avoid; }
}