/* lumbda repl — grid-only layout. Inherits palette + base from style.css. */

body.repl {
  /* Plain document flow — no min-height, no overflow. The page scrolls
   * naturally when content exceeds the viewport; the prompt-bar uses
   * position: sticky so it stays glued to the bottom of the viewport in
   * that case, and sits right under the transcript otherwise. */
}

/* ─── Lock screen overlay ──────────────────────────────────────── */

.lock-screen {
  position: fixed; inset: 0; z-index: 1000;
  display: grid;
  place-items: center;
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(4px);
}
.lock-card {
  background: var(--pane-bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1.5rem 2rem;
  max-width: 28rem;
  width: 90%;
  display: grid;
  gap: 0.4rem;
}
.lock-card h2 {
  margin: 0 0 0.1rem;
  font-family: 'chunkfive', Georgia, serif;
  font-size: 1.4rem;
  color: var(--green);
  font-weight: normal;
}
.lock-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}
.lock-card input[type=password] {
  width: 100%;
  padding: 0.5rem 0.7rem;
  margin: 0.4rem 0 0;
  background: var(--code-bg);
  color: var(--fg);
  border: 1px solid var(--rule);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 0.95rem;
}
.lock-card input[type=password]:focus {
  outline: none;
  border-color: var(--green);
}
.lock-row {
  display: grid;
  grid-template-columns: auto auto;
  gap: 0.6rem;
  margin-top: 0.5rem;
  justify-content: start;
}
.lock-row button {
  font-family: var(--mono);
  font-size: 0.85em; font-weight: 600;
  padding: 0.45rem 1.1rem;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid var(--green);
}
.lock-row .primary { background: var(--green); color: var(--bg); }
.lock-row .secondary { background: transparent; color: var(--green); }
.lock-row .primary:hover { filter: brightness(1.1); }
.lock-row .secondary:hover { background: var(--code-bg); }
.lock-note {
  margin: 0.4rem 0 0;
  color: var(--err);
  font-size: 0.8rem;
  min-height: 1.2em;
}
.lock-explain {
  margin: 0.4rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}
.lock-explain summary {
  cursor: pointer;
  color: var(--green);
  user-select: none;
}
.lock-explain summary:hover { text-decoration: underline; }
.lock-explain ul {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.3rem;
}
.lock-explain li { line-height: 1.45; }
.lock-explain code {
  background: var(--code-bg);
  padding: 0 0.2em;
  border-radius: 2px;
  font-size: 0.92em;
}
.lock-explain a {
  color: var(--green);
  text-decoration: none;
}
.lock-explain a:hover { text-decoration: underline; }
.lock-explain strong { color: var(--fg); }

/* ─── Tab bar ──────────────────────────────────────────────────── */

.tabbar {
  /* Sticks to the top of the viewport so it stays visible after the
   * header scrolls away — keeps the active-session controls reachable
   * even after a long transcript pushes them off-screen. */
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  /* tabs · new-tab · spacer · heap-pressure (injected by repl.js) ·
   * reboot · clear · cancel · lock — 8 cells. Extend if the toolbar
   * grows; CSS Grid drops trailing children onto a new row, which is
   * how lock used to wrap. */
  grid-template-columns: auto auto 1fr auto auto auto auto auto;
  gap: 0.3rem;
  align-items: center;
  padding: 0.4rem 0.4rem;
  margin: 0 0 0.4rem;
  background: var(--code-bg);
  border-bottom: 1px solid var(--rule);
}
.tabs {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 0.3rem;
  overflow-x: auto;
}
.tab {
  background: var(--pane-bg);
  border: 1px solid var(--rule);
  padding: 0.25rem 0.6rem;
  border-radius: 3px 3px 0 0;
  font-size: 0.85em;
  cursor: pointer;
  display: inline-grid;
  grid-template-columns: auto auto;
  gap: 0.3rem;
  align-items: center;
  white-space: nowrap;
}
.tab.active {
  background: var(--code-bg);
  border-bottom-color: var(--code-bg);
  color: var(--green);
}
.tab .tab-close {
  opacity: 0.5;
  cursor: pointer;
  padding: 0 0.2rem;
}
.tab .tab-close:hover { opacity: 1; color: var(--err); }
.tabbar .ghost {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.8em;
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  cursor: pointer;
}
.tabbar .ghost:hover:not(:disabled) {
  border-color: var(--green); color: var(--green);
}
.tabbar .ghost:disabled { opacity: 0.4; cursor: default; }
.tabbar .heap-pressure {
  color: var(--muted);
  font-size: 0.72em;
  font-family: var(--mono);
  white-space: nowrap;
  padding: 0 0.4rem;
}

/* Portal bar — REPL save/resume controls. Sits between tabbar and
 * transcript. Hidden when the active tier has no portal support yet
 * (the asm-wat tier stays grey). */
.portal-bar {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 0.4rem;
  align-items: center;
  padding: 0.2rem 0.5rem;
  background: var(--code-bg);
  border-bottom: 1px solid var(--rule);
  font-size: 0.78em;
  font-family: var(--mono);
}
.portal-bar .portal-label {
  color: var(--muted);
}
.portal-bar .portal-chips {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 0.3rem;
  overflow-x: auto;
}
.portal-chips .chip {
  display: inline-grid;
  grid-template-columns: auto auto;
  gap: 0.3rem;
  align-items: center;
  background: var(--pane-bg);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.1rem 0.4rem;
  color: var(--green);
  cursor: pointer;
  white-space: nowrap;
}
.portal-chips .chip:hover { border-color: var(--green); }
.portal-chips .chip .chip-close {
  color: var(--muted);
  font-size: 0.85em;
  cursor: pointer;
  padding: 0 0.15rem;
}
.portal-chips .chip .chip-close:hover { color: var(--err); }

/* ─── Transcript ───────────────────────────────────────────────── */

/* The REPL stream is the page's only scroller. Header stays pinned;
 * tabs, transcript, and prompt all flow inside this one scroller so
 * fresh sessions show the prompt up near the top and it drifts down
 * with each new entry. */
.repl-stream {
  background: var(--code-bg);
  display: grid;
  grid-template-rows: auto auto auto;
  align-content: start;
}
.transcript {
  /* Same horizontal inset as the active prompt-bar so prior λ> sigils
   * line up with the live one. No max-width / margin: auto here — a
   * centered transcript on wide viewports would mis-align with the
   * left-flush prompt-bar. Long lines wrap inside the entry instead. */
  padding: 0.4rem 0.4rem 0;
  font-family: var(--mono);
  font-size: 0.92em;
  line-height: 1.45;
}
.transcript .entry {
  margin: 0;
  padding: 0;
}
.transcript .entry .prompt-line {
  color: var(--green);
  white-space: pre-wrap;
  word-break: break-word;
}
.transcript .entry .prompt-line .sigil {
  display: inline-block;
  width: 3ch;
  opacity: 0.7;
}
.transcript .entry .tier-output {
  display: block;
  padding: 0;
  color: var(--fg);
}
.transcript .entry .tier-result {
  white-space: pre-wrap;
  word-break: break-word;
  padding-left: 3ch;             /* line up under "λ> " */
}
.transcript .entry .tier-meta {
  color: var(--muted);
  font-size: 0.78em;
  margin-left: 0.6em;
  user-select: none;
}
.transcript .entry .tier-meta::before {
  content: "; ";                  /* render as a lisp comment */
  color: var(--muted);
  opacity: 0.6;
}
.transcript .entry.error .tier-result { color: var(--err); }
.transcript .entry + .entry { margin-top: 0.4rem; }

/* ─── Prompt bar ───────────────────────────────────────────────── */

.prompt-bar {
  /* Flows directly under the last transcript entry — connected, no gap.
   * Sticks to the viewport bottom once the page scrolls past it. */
  position: sticky;
  bottom: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 0.4rem;
  align-items: center;
  padding: 0.3rem 0.4rem 0.5rem;
  background: var(--code-bg);
}
.prompt-bar .prompt-sigil {
  color: var(--green);
  font-weight: 600;
  font-size: 0.95em;
}
.prompt-bar textarea {
  resize: none;
  background: var(--code-bg);
  border: none;
  color: var(--fg);
  padding: 0.25rem 0;
  font-family: var(--mono);
  font-size: 0.92em;
  min-height: 1.5em;
  max-height: 30vh;
  min-width: 0;
}
.prompt-bar textarea:focus { outline: none; border-color: var(--green); }
.prompt-bar select {
  background: var(--code-bg);
  border: 1px solid var(--rule);
  color: var(--fg);
  padding: 0.35rem 0.5rem;
  font-family: var(--mono);
  font-size: 0.85em;
  border-radius: 3px;
}
.prompt-bar button.primary {
  background: var(--green);
  color: var(--bg);
  border: 1px solid var(--green);
  padding: 0.4rem 1rem;
  font-family: var(--mono);
  font-weight: 600;
  border-radius: 3px;
  cursor: pointer;
}
.prompt-bar button.primary:hover { filter: brightness(1.1); }
.prompt-bar button.primary:disabled { opacity: 0.4; cursor: wait; }

kbd {
  font-family: var(--mono);
  background: var(--code-bg);
  padding: 0.05em 0.3em;
  border: 1px solid var(--rule);
  border-radius: 2px;
  font-size: 0.85em;
}