/* ==========================================================================
   Build Lab — two calm columns: "Ask" (left) and "Preview" (right).
   Big and obvious on a projector; stacks on phones (Ask on top).
   Everything is scoped under .lab (the element the Lab mounts into).
   Colours only via theme.css variables, so light and dark both work.
   ========================================================================== */

.lab {
  --lab-top: 60px;        /* page header height — lab.js measures the real value */
  --lab-pad: 1rem;
}

.lab .lab-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  padding: var(--lab-pad) max(16px, 2vw) 2.5rem;
  max-width: 1920px;
  margin-inline: auto;
}

/* ≥1000px: Ask ~400px on the left, Preview fills the rest; both columns fit the screen */
@media (min-width: 1000px) {
  .lab .lab-cols {
    grid-template-columns: 400px minmax(0, 1fr);
    align-items: start;
    padding-bottom: var(--lab-pad);
  }
  .lab .lab-ask,
  .lab .lab-preview {
    position: sticky;
    top: calc(var(--lab-top) + var(--lab-pad));
    height: calc(100dvh - var(--lab-top) - 2 * var(--lab-pad));
  }
  .lab .lab-ask { overflow-y: auto; overscroll-behavior: contain; scrollbar-gutter: stable; }
  .lab .lab-preview { min-height: 680px; }
}

.lab .lab-small { font-size: 0.9rem; margin: 0 0 0.6rem; }
.lab .lab-offscreen { position: fixed; top: 0; left: -9999px; opacity: 0; }

/* ---------------------------------------------------------------- Ask */
.lab .lab-ask {
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.15rem 1.4rem;
  box-shadow: var(--shadow);
}
.lab .lab-intro p { font-size: 1.15rem; line-height: 1.4; margin-bottom: 0.6rem; }
.lab .lab-intro strong { color: var(--field); }
.lab .lab-status { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; margin-bottom: 1rem; }
.lab .lab-status-chip { font-size: 0.9rem; padding: 0.3em 0.8em; white-space: normal; }

.lab .lab-form { display: flex; flex-direction: column; gap: 0.6rem; }
.lab .lab-form-row { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.lab .lab-level { display: flex; align-items: center; gap: 0.5rem; flex: 1 1 10rem; }
.lab .lab-level select { flex: 1; font-weight: 700; }
.lab .lab-new { flex: none; }
.lab .lab-ask-label { font-size: 1rem; margin-top: 0.2rem; }
.lab #lab-ask {
  font-size: 1.15rem;
  line-height: 1.4;
  min-height: 7.5em;
  resize: vertical;
}
.lab #lab-ask::placeholder { color: var(--ink-3); }
.lab .lab-go { width: 100%; font-size: 1.35rem; }
.lab .lab-hint { margin: 0; font-size: 0.85rem; color: var(--ink-3); }
@media (hover: none) { .lab .lab-hint { display: none; } }   /* no keyboard shortcut talk on phones */
.lab .lab-msg { margin: 0; min-height: 1.4em; font-weight: 700; color: var(--field); }
.lab .lab-msg:empty { min-height: 0; }
.lab .lab-msg.is-error { color: var(--barn); }

.lab .lab-confirm {
  border: 2px solid var(--barn);
  background: var(--barn-2);
  border-radius: var(--radius);
  padding: 0.8rem 0.9rem;
}
.lab .lab-confirm p { font-weight: 700; margin-bottom: 0.6rem; }

.lab .lab-sec { border-top: 1.5px dashed var(--line); margin-top: 1.1rem; padding-top: 0.95rem; }
.lab .lab-h { font-size: 1.1rem; margin: 0 0 0.35rem; }

/* chips: starters and prepared examples */
.lab .lab-chips { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.lab .lab-chip {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  min-height: 44px;
  padding: 0.35em 0.85em;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink);
  font: 700 0.92rem/1.2 var(--font-body);
  text-align: left;
  cursor: pointer;
}
.lab .lab-chip:hover { border-color: var(--harvest); background: var(--harvest-2); }
.lab .lab-chip-ex { background: var(--sky-2); border-color: color-mix(in srgb, var(--sky) 45%, var(--line)); }
.lab .lab-chip-ex:hover { border-color: var(--sky); background: var(--sky-2); }
.lab .lab-chip-level {
  font-size: 0.75rem;
  padding: 0.1em 0.5em;
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-2);
}
.lab button:focus-visible,
.lab a:focus-visible,
.lab summary:focus-visible,
.lab .lab-code:focus-visible { outline: 3px solid var(--sky); outline-offset: 2px; }
.lab button:disabled { cursor: not-allowed; opacity: 0.5; }

/* conversation: user bubbles + version rows */
.lab .lab-convo-list { list-style: none; margin: 0.3rem 0 0.6rem; padding: 0; display: flex; flex-direction: column; gap: 0.45rem; }
.lab .lab-bubble {
  align-self: flex-end;
  max-width: 88%;
  padding: 0.5rem 0.8rem;
  border-radius: 16px 16px 4px 16px;
  background: var(--sky-2);
  color: var(--ink);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 0.95rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 8;
  line-clamp: 8;
  overflow: hidden;
}
.lab .lab-vrow { display: flex; flex-direction: column; gap: 0.25rem; }
.lab .lab-version {
  appearance: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  min-height: 48px;
  padding: 0.45rem 0.8rem;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  color: var(--ink);
  font: 700 0.95rem/1.25 var(--font-body);
  text-align: left;
  cursor: pointer;
}
.lab .lab-version:hover:not(:disabled) { border-color: var(--field); }
.lab .lab-version[aria-current="true"] { border: 2px solid var(--field); background: var(--field-2); }
.lab .lab-version.is-writing {
  cursor: default;
  justify-content: flex-start;
  border-style: dashed;
  border-color: var(--harvest);
  background: var(--harvest-2);
  font-variant-numeric: tabular-nums;
}
.lab .lab-newest { font-size: 0.72rem; padding: 0.1em 0.55em; }
.lab .lab-vnote { margin: 0; font-size: 0.85rem; color: var(--barn); }
.lab .lab-dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--harvest);
  animation: lab-pulse 1s ease-in-out infinite alternate;
}
@keyframes lab-pulse { from { opacity: 0.25; transform: scale(0.8); } to { opacity: 1; transform: scale(1.1); } }

/* recent builds + shared links */
.lab .lab-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.35rem; }
.lab .lab-item { display: flex; align-items: stretch; gap: 0.35rem; }
.lab .lab-item-open {
  appearance: none;
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  min-height: 44px;
  padding: 0.35rem 0.75rem;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  font: 700 0.92rem/1.25 var(--font-body);
  text-align: left;
  cursor: pointer;
}
.lab .lab-item-open:hover:not(:disabled) { border-color: var(--field); }
.lab .lab-item-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lab .lab-item-time { flex: none; font-weight: 400; font-size: 0.8rem; color: var(--ink-3); }
.lab .lab-x {
  appearance: none;
  flex: none;
  width: 44px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--ink-2);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
}
.lab .lab-x:hover { color: var(--barn); border-color: var(--barn); }

/* <details> sections */
.lab details.lab-sec > summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
}
.lab details.lab-sec > summary::-webkit-details-marker { display: none; }
.lab details.lab-sec > summary::before { content: "▸"; color: var(--harvest); transition: transform 0.15s ease; }
.lab details.lab-sec[open] > summary::before { transform: rotate(90deg); }
.lab details.lab-sec[open] > summary { margin-bottom: 0.4rem; }
.lab .lab-recipe-text {
  font: 500 0.78rem/1.5 var(--font-mono);
  background: var(--paper-2);
  color: var(--ink);
  resize: vertical;
  margin-bottom: 0.6rem;
}
.lab .lab-copy-prompt { width: 100%; white-space: normal; margin-bottom: 0.5rem; }

/* ---------------------------------------------------------------- Preview */
.lab .lab-preview {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-width: 0;
  scroll-margin-top: calc(var(--lab-top) + 8px);
}
.lab .lab-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem; }
.lab .lab-tabs { display: inline-flex; border: 2px solid var(--ink); border-radius: 12px; overflow: hidden; }
.lab .lab-tab {
  appearance: none;
  min-height: 44px;
  padding: 0 1.15em;
  border: 0;
  background: var(--card);
  color: var(--ink);
  font: 700 1rem/1 var(--font-body);
  cursor: pointer;
}
.lab .lab-tab + .lab-tab { border-left: 2px solid var(--ink); }
.lab .lab-tab[aria-selected="true"] { background: var(--ink); color: var(--paper); }
.lab .lab-tools { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.lab .lab-tool { min-height: 44px; font-size: 0.95rem; }
.lab .lab-tool[aria-pressed="true"] { --bg: var(--field-2); --bd: var(--field); color: var(--field); }
.lab a.lab-tool[aria-disabled="true"] { opacity: 0.45; pointer-events: none; }

.lab .lab-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem 0.4rem;
  min-height: 1.6em;
  font-size: 1.02rem;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.lab .lab-meta-title { font-family: var(--font-display); font-size: 1.15rem; color: var(--ink); }
.lab .lab-meta-sep { color: var(--ink-3); }
.lab .lab-meta-chip { font-size: 0.75rem; }
.lab .lab-meta-note { color: var(--barn); font-weight: 700; flex-basis: 100%; }
.lab .lab-slow {
  margin: 0;
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius);
  background: var(--harvest-2);
  border: 1.5px solid var(--harvest);
  font-weight: 700;
}

/* the stage holds the panes (frame / code), the empty state and the share overlay in one grid cell */
.lab .lab-stage {
  position: relative;
  flex: 1 1 auto;
  min-height: 560px;
  display: grid;
  grid-template: minmax(0, 1fr) / minmax(0, 1fr);
  container: lab-stage / inline-size;
}
.lab .lab-stage > * { grid-area: 1 / 1; min-width: 0; min-height: 0; }
@media (max-width: 999.98px) {
  /* stacked: the demo gets 70% of the phone screen; the empty-state card just takes the room it needs */
  .lab .lab-stage { flex: none; min-height: 0; }
  .lab .lab-panes { height: 70dvh; min-height: 420px; }
}

.lab .lab-panes { display: grid; gap: 0.75rem; grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr); }
.lab .lab-panes[data-view="preview"] .lab-code-pane,
.lab .lab-panes[data-view="code"] .lab-frame-wrap,
.lab .lab-panes[data-view="split"] .lab-frame-wrap { display: none; }
/* While the AI writes: code and the growing preview side by side when there is room */
@container lab-stage (min-width: 760px) {
  .lab .lab-panes[data-view="split"] { grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); }
  .lab .lab-panes[data-view="split"] .lab-code-pane { order: -1; }   /* code left, preview right */
  .lab .lab-panes[data-view="split"] .lab-frame-wrap { display: grid; }
}

.lab .lab-frame-wrap {
  display: grid;
  grid-template: minmax(0, 1fr) / minmax(0, 1fr);
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  overflow: hidden;
}
.lab .lab-frame-wrap > * { grid-area: 1 / 1; }
.lab .lab-frame-hint { align-self: center; justify-self: center; margin: 0; padding: 1rem; color: var(--ink-3); text-align: center; }
.lab .lab-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  color-scheme: light;     /* demos are written for a light page */
  background: Canvas;      /* = white in the light scheme, so a demo without its own background stays readable */
}
.lab .lab-frame.is-next { opacity: 0; pointer-events: none; }
.lab .lab-frame-wrap.is-phone { padding: 14px; background: var(--paper-3); }
.lab .lab-frame-wrap.is-phone .lab-frame {
  justify-self: center;
  width: min(390px, 100%);
  border: 10px solid var(--ink);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.lab .lab-code-pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
  overflow: hidden;
}
.lab .lab-code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.35rem 0.5rem 0.35rem 0.85rem;
  border-bottom: 1.5px solid var(--line);
  background: var(--card);
}
.lab .lab-code-label { font-size: 0.9rem; color: var(--ink-2); font-weight: 700; font-variant-numeric: tabular-nums; }
.lab .lab-code {
  flex: 1;
  min-height: 0;
  margin: 0;
  padding: 0.8rem 0.95rem 1.4rem;
  overflow: auto;
  font: 500 0.8rem/1.5 var(--font-mono);
  color: var(--ink);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  tab-size: 2;
}

/* empty state: the five steps */
.lab .lab-empty { display: grid; place-items: center; padding: 1rem; border: 2px dashed var(--line); border-radius: var(--radius-lg); background: var(--paper-2); overflow: auto; }
.lab .lab-empty-card {
  max-width: 640px;
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: var(--radius-lg);
  padding: clamp(1.1rem, 3vw, 2rem);
  box-shadow: 8px 8px 0 var(--harvest);
}
.lab .lab-empty-card h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
.lab .lab-steps { list-style: none; counter-reset: lab-step; margin: 1rem 0 0.8rem; padding: 0; display: grid; gap: 0.75rem; }
.lab .lab-steps li {
  counter-increment: lab-step;
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  column-gap: 0.8rem;
  align-items: center;
}
.lab .lab-steps li::before {
  content: counter(lab-step);
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  background: var(--field);
  color: var(--paper);
  font: 800 1.3rem/1 var(--font-display);
}
.lab .lab-steps strong { font-size: clamp(1.1rem, 1.8vw, 1.3rem); }
.lab .lab-steps span { color: var(--ink-2); font-size: 0.95rem; }
.lab .lab-tip { margin: 0; font-weight: 700; color: var(--soil); }
:root[data-theme="dark"] .lab .lab-tip { color: var(--harvest); }

/* share overlay: big QR + link, readable from the back of the room */
.lab .lab-share {
  z-index: 2;
  display: grid;
  place-items: center;
  padding: 1rem;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper) 80%, transparent);
  backdrop-filter: blur(3px);
  overflow: auto;
}
.lab .lab-share-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.25rem 1.75rem;
  max-width: 100%;
  background: var(--card);
  border: 3px solid var(--ink);
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 3vw, 1.75rem);
  box-shadow: 8px 8px 0 var(--plum);
}
.lab .lab-qr {
  width: clamp(200px, 30vh, 260px);
  height: auto;
  aspect-ratio: 1;
  border-radius: 10px;
  border: 2px solid var(--line);
}
.lab .lab-share-text { display: flex; flex-direction: column; gap: 0.5rem; min-width: min(100%, 16rem); max-width: 30rem; }
.lab .lab-share-kicker { margin: 0; font-weight: 700; color: var(--plum); text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.85rem; }
.lab .lab-share-title { margin: 0; font-family: var(--font-display); font-weight: 800; font-size: 1.35rem; line-height: 1.15; }
.lab .lab-share-link {
  font: 500 clamp(1.15rem, 2.4vw, 1.6rem)/1.25 var(--font-mono);
  color: var(--ink);
  overflow-wrap: anywhere;
  text-decoration-color: var(--plum);
}

/* ---------------------------------------------------------------- PIN dialog */
.lab .lab-dialog {
  width: min(440px, calc(100vw - 32px));
  border: 2px solid var(--ink);
  border-radius: var(--radius-lg);
  background: var(--card);
  color: var(--ink);
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow);
}
.lab .lab-dialog::backdrop {
  background: color-mix(in srgb, var(--paper) 70%, transparent);
  backdrop-filter: blur(3px);
}
.lab .lab-dialog h2 { font-size: 1.5rem; }
.lab .lab-dialog form { display: flex; flex-direction: column; gap: 0.5rem; }
.lab .lab-dialog input {
  font: 700 1.4rem/1.2 var(--font-mono);
  letter-spacing: 0.15em;
  color: var(--ink);
  background: var(--paper);
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 0.5em 0.7em;
  min-height: 52px;
  width: 100%;
}
.lab .lab-dialog input:focus-visible { outline: 3px solid var(--sky); outline-offset: 1px; border-color: var(--sky); }
.lab .lab-pin-err { margin: 0; min-height: 1.4em; color: var(--barn); font-weight: 700; }
.lab .lab-dialog-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 0.3rem; }

@media (prefers-reduced-motion: reduce) {
  .lab .lab-dot { animation: none; }
}