/* Keep the surrounding article's examples within narrow browser windows. */
article:has(#zipper-playground) > pre { white-space: pre-wrap; overflow-wrap: anywhere; }

.zipper-standalone { margin: 0; padding: 44px 24px; background: #edf1e9; }
.zipper-lab {
  --zl-ink: #183a2e; --zl-muted: #536b60; --zl-line: #d5dfd2;
  --zl-paper: #fafbf6; --zl-green: #dfff85; --zl-dark: #142d25;
  box-sizing: border-box; width: min(1180px, calc(100vw - 40px)); max-width: none;
  position: relative; left: 50%; transform: translateX(-50%); margin: 32px 0;
  color: var(--zl-ink); background: var(--zl-paper); border: 1px solid var(--zl-line);
  border-radius: 24px; box-shadow: 0 16px 56px #243b2010;
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light; text-align: left; overflow: hidden;
}
.zipper-lab *, .zipper-lab *::before, .zipper-lab *::after { box-sizing: border-box; }
.zipper-lab [hidden] { display: none !important; }
.zipper-lab h2, .zipper-lab h3, .zipper-lab p { margin: 0; }
.zipper-lab button, .zipper-lab select, .zipper-lab input, .zipper-lab textarea { font: inherit; }
.zipper-lab button, .zipper-lab select, .zipper-lab input { border: 1px solid var(--zl-line); border-radius: 7px; background: #fff; color: var(--zl-ink); }
.zipper-lab button { padding: 9px 15px; font-weight: 650; cursor: pointer; white-space: nowrap; transition: background .15s, border-color .15s; }
.zipper-lab button:hover:enabled { border-color: #778d77; background: #edf3e5; }
.zipper-lab button:disabled { opacity: .38; cursor: default; }
.zipper-lab :focus-visible { outline: 3px solid #6a9275; outline-offset: 3px; }
.zipper-lab select { padding: 8px 26px 8px 10px; max-width: 100%; }
.zipper-lab input { padding: 8px; }
.zipper-lab pre, .zipper-lab code, .zipper-lab textarea { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.zipper-lab code { font-size: .94em; color: inherit; background: transparent; }
.zipper-lab pre { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.zipper-lab a { color: var(--zl-ink); }
.zl-header { padding: 28px 32px 0; }
.zl-brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 750; letter-spacing: -.04em; }
.zl-logo { display: grid; place-items: center; height: 30px; width: 30px; background: var(--zl-ink); color: var(--zl-green); border-radius: 7px; font-size: 22px; font-style: italic; }
.zl-brand-note { margin-left: 10px; font-size: 12px; font-weight: 400; color: var(--zl-muted); letter-spacing: 0; }
.zl-local { margin-left: auto; font-size: 11px; color: var(--zl-muted); font-weight: 500; letter-spacing: 0; }
.zl-local span { color: #5d8238; margin-right: 5px; }
.zl-intro { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; padding: 30px 0 25px; }
.zl-eyebrow { font-size: 10px; font-weight: 700; letter-spacing: .14em; color: var(--zl-muted); margin-bottom: 10px !important; }
.zipper-lab .zl-intro h2 { font-size: clamp(34px, 4.5vw, 52px); font-weight: 650; line-height: 1.03; letter-spacing: -.055em; }
.zl-intro > p { max-width: 340px; padding-bottom: 4px; color: var(--zl-muted); line-height: 1.7; }
.zl-tape-strip { display: flex; align-items: center; gap: 18px; border-top: 1px solid var(--zl-line); padding: 12px 0; font: 11px/1.4 monospace; color: #758373; overflow: hidden; white-space: nowrap; }
.zl-strip-cursor { color: #67933f; font-size: 22px; line-height: 1; }
.zl-strip-caption { margin-left: auto; font: 10px/1.4 system-ui, sans-serif; letter-spacing: .035em; }
.zl-workbench { background: #f0f4e9; border-block: 1px solid var(--zl-line); padding: 20px 24px 0; }
.zl-example-row { display: flex; align-items: center; gap: 20px; margin-bottom: 18px; }
.zl-example-picker label { display: block; font-size: 9px; font-weight: 750; letter-spacing: .12em; margin-bottom: 5px; }
.zl-example-picker > div { display: flex; gap: 7px; }
.zl-example-picker select { min-width: 230px; }
.zl-example-row > p { max-width: 330px; color: var(--zl-muted); font-size: 11px; margin-top: 15px; }
.zl-controls, .zl-actions, .zl-settings { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.zl-controls { justify-content: space-between; gap: 16px; }
.zipper-lab button.zl-primary { background: var(--zl-ink); color: var(--zl-green); border-color: var(--zl-ink); padding-inline: 24px; }
.zipper-lab button.zl-primary:hover { background: #29543e; color: #eaffb8; }
.zl-actions button span { padding-right: 4px; }
.zipper-lab button.zl-quiet { background: transparent; border-color: transparent; }
.zl-settings { gap: 14px; }
.zl-settings label { font-size: 10px; color: var(--zl-muted); display: flex; align-items: center; gap: 7px; }
.zl-settings select, .zl-settings input { width: 86px; padding: 7px; font-size: 11px; }
.zl-help { color: var(--zl-muted); font-size: 10px; line-height: 1.6; }
.zl-workbench > .zl-help { padding: 10px 0 14px; }
.zl-status-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding: 12px 0; border-top: 1px solid var(--zl-line); font-size: 11px; }
.zl-status { border-radius: 20px; padding: 3px 10px; background: #dae5d0; color: #315239; font-size: 10px; font-weight: 700; }
.zl-status[data-status="error"] { background: #ffe0d3; color: #8b341b; }
.zl-status[data-status="waiting"], .zl-status[data-status="limit"] { background: #f7e9be; color: #755919; }
#zl-step-count { color: var(--zl-ink); font-variant-numeric: tabular-nums; }
#zl-message { color: var(--zl-muted); flex: 1; min-width: 220px; }
.zl-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; padding: 22px 24px; }
.zl-panel { min-width: 0; border: 1px solid var(--zl-line); border-radius: 12px; overflow: hidden; background: white; }
.zl-panel-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px 6px; min-height: 47px; }
.zipper-lab h3 { font-size: 13px; font-weight: 700; letter-spacing: -.015em; }
.zl-section-number { color: #799177; font-size: 10px; margin-right: 8px; font-weight: 500; }
.zipper-lab button.zl-text-button { border: none; background: transparent; padding: 3px 0; font-size: 10px; font-weight: 500; }
.zl-panel-help { padding: 0 16px 12px; color: var(--zl-muted); font-size: 10px; min-height: 32px; }
.zl-code-editor { display: flex; height: 266px; background: var(--zl-dark); color: #e6eedd; overflow: hidden; }
.zipper-lab #zl-lines { flex: 0 0 39px; padding: 18px 7px 18px 0; text-align: right; color: #749181; background: #11281f; user-select: none; overflow: hidden; font-size: 12px; line-height: 1.85; }
.zipper-lab #zl-source { width: 100%; min-width: 0; resize: none; padding: 18px 14px; border: 0; border-radius: 0; background: transparent; color: #e6eedd; font-size: 12px; line-height: 1.85; tab-size: 2; outline-offset: -3px; white-space: pre; }
.zl-editor-footer, .zl-tape-footer { display: flex; gap: 15px; justify-content: space-between; padding: 11px 16px; color: var(--zl-muted); font-size: 9px; min-height: 48px; align-items: center; }
.zl-editor-footer > span:first-child { max-width: 70%; }
.zl-editor-footer > span:last-child { text-align: right; }
.zipper-lab .zl-tape { height: 266px; overflow: auto; padding: 18px; font-size: 11px; line-height: 1.85; color: #4f6758; background: #f4f7ef; border-block: 1px solid #e2e8dc; }
.zl-tape mark, .zl-legend-call { background: #dcecad; color: #263f23; border-radius: 3px; box-decoration-break: clone; }
.zl-tape mark { padding: 2px 0; }
.zl-cursor, .zl-legend-cursor { background: #315640; color: #dfff85; border-radius: 2px; padding: 1px 2px; }
.zl-tape-footer > span:last-child { color: #7a8979; }
.zl-meta { color: var(--zl-muted); font-size: 10px; font-weight: 400; }
.zipper-lab .zl-output { min-height: 213px; max-height: 310px; padding: 18px; font-size: 13px; line-height: 1.8; overflow: auto; border-top: 1px solid #e6ebe2; color: #214837; }
.zl-output:empty::before { content: "Your program’s words will appear here."; color: #8b9687; font-family: system-ui, sans-serif; font-size: 12px; }
.zl-console { padding: 10px 16px; border-top: 1px solid #e6ebe2; font-size: 10px; color: var(--zl-muted); }
.zl-console summary { cursor: pointer; }
#zl-console-count { float: right; }
.zl-console .zl-help { padding-top: 8px; }
.zl-console pre { max-height: 160px; overflow: auto; padding-top: 8px; }
.zl-preview-badge { color: #617952; background: #edf4e5; border-radius: 4px; padding: 4px 6px; font-size: 8px; letter-spacing: .06em; }
.zl-preview { height: 270px; background: #f3f6ef; border-top: 1px solid #e2e8dc; }
.zl-preview iframe { width: 100%; height: 100%; border: 0; display: block; background: #f3f6ef; }
.zl-preview-footer { padding: 10px 16px; color: var(--zl-muted); font-size: 9px; }
.zl-tape-editor { padding: 10px 14px; min-height: 266px; }
.zl-tape-editor label { font-size: 10px; color: var(--zl-muted); }
.zl-tape-editor textarea { display: block; width: 100%; height: 190px; margin: 8px 0; resize: vertical; font-size: 11px; border: 1px solid var(--zl-line); border-radius: 5px; padding: 10px; background: #f4f7ef; color: var(--zl-ink); }
.zl-tape-editor button { padding: 5px 10px; font-size: 10px; margin-right: 8px; }
.zl-guide { margin: 0 24px 22px; padding: 16px 0; border-block: 1px solid var(--zl-line); }
.zl-guide > summary { display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-size: 13px; font-weight: 600; list-style: none; }
.zl-guide > summary::-webkit-details-marker { display: none; }
.zl-guide .zl-meta span { margin-left: 20px; font-size: 18px; }
.zl-guide-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; padding-top: 22px; }
.zl-guide-grid h3 { margin-bottom: 8px; }
.zl-guide-grid p { font-size: 11px; color: var(--zl-muted); margin: 8px 0; }
.zl-guide-grid pre { padding: 10px; background: #edf3e5; font-size: 10px; }
.zl-footer { display: flex; justify-content: space-between; padding: 0 24px 22px; font-size: 9px; letter-spacing: .08em; color: #758573; }
.zl-footer a { letter-spacing: 0; text-decoration: none; }
@media (max-width: 780px) {
  .zipper-standalone { padding: 12px 0; }
  .zipper-lab { width: calc(100vw - 24px); margin-block: 16px; border-radius: 16px; }
  .zl-header { padding: 22px 20px 0; }
  .zl-brand-note { display: none; }
  .zl-intro { align-items: flex-start; gap: 20px; }
  .zl-intro > p { max-width: 235px; font-size: 12px; }
  .zl-workbench { padding: 16px 16px 0; }
  .zl-example-row { flex-wrap: wrap; gap: 0; }
  .zl-example-row > p { margin-top: 7px; max-width: none; }
  .zl-grid { padding: 16px; gap: 12px; }
  .zl-guide { margin-inline: 16px; }
  .zl-guide-grid { grid-template-columns: 1fr; gap: 12px; }
}
@media (max-width: 580px) {
  .zl-intro { display: block; padding-top: 24px; }
  .zl-intro > p { max-width: none; margin-top: 16px; }
  .zl-local { font-size: 9px; }
  .zl-grid { grid-template-columns: minmax(0, 1fr); }
  .zl-example-picker { width: 100%; }
  .zl-example-picker select { min-width: 0; flex: 1; width: 100%; }
  .zl-example-picker > div { width: 100%; }
  .zl-example-picker button { font-size: 11px; padding: 8px 10px; }
  .zl-actions { gap: 5px; }
  .zl-actions button { padding: 9px 12px; font-size: 12px; }
  .zl-settings { width: 100%; }
  .zl-settings label { flex: 1; }
  .zl-tape-strip { gap: 12px; }
  .zl-strip-caption { display: none; }
  .zl-guide > summary { gap: 10px; font-size: 11px; }
  .zl-guide .zl-meta { max-width: 130px; text-align: right; }
  .zl-guide .zl-meta span { margin-left: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  .zipper-lab button { transition: none; }
}