/* ============================================================================
   Beamer+ widget base — the shared design language for every widget.

   Injected into every widget iframe ahead of the widget's own <style>, so a
   widget can still override anything, but shouldn't need to: if two widgets
   both draw a toolbar, they should draw the same toolbar.

   What belongs here: tokens, the reset, and any furniture more than one
   widget needs — toolbars, buttons, status pills, inputs, banners, empty and
   loading states. What stays in a widget: whatever is genuinely its own
   (a keypad, a plot, a QR panel).

   ── Presentation scale ──────────────────────────────────────────────────
   These widgets are read from the back of a room, not from a desk. --u is
   the scale for everything the room has to READ; chrome (toolbars, small
   buttons, meta text) is deliberately fixed, so raising the scale makes the
   content bigger without inflating the furniture around it.

   A widget opts in by declaring a `scale` field in its schema — the settings
   kit applies the presenter's choice to --u automatically.
   ========================================================================= */

:root {
  /* Palette — light */
  --bg:         #ffffff;
  --bg-subtle:  #f9f9f8;
  --bg-output:  #fafaf9;
  --border:     #e9e9e6;
  --border-med: #d4d4cf;
  --text:       #1a1a18;
  --text-2:     #6b6b65;
  --text-3:     #aeaea5;
  --accent:     #52524e;
  --accent-bg:  #f0f0ee;
  --on-accent:  #ffffff;

  /* Status */
  --ok:     #15803d;
  --green:  #15803d;
  --warn:   #b45309;
  --amber:  #b45309;
  --err:    #c0392b;
  --red:    #dc2626;
  --err-bg: #fef2f2;

  /* Data colours — for anything a widget draws itself: word clouds, plots,
     result bars. Ordered so the first few carry the most weight, and defined
     for both themes so a canvas can read them instead of hardcoding ink. */
  --chart-1: #1a1a18;
  --chart-2: #3d3d3a;
  --chart-3: #52524e;
  --chart-4: #6b6b65;
  --chart-5: #85857d;
  --chart-6: #9c9c94;

  /* Shape & motion */
  --radius:    6px;
  --radius-lg: 10px;
  --dur:       0.12s;

  /* Type */
  --font-ui:   'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  /* Presentation scale — see the note above. */
  --u: 1.4;

  /* Chrome: fixed, whatever --u is. */
  --fs-chrome:    12px;
  --fs-chrome-sm: 11px;
  --fs-title:     13px;

  /* Content: scales with the room. */
  --fs-body:  calc(14px * var(--u));
  --fs-lead:  calc(18px * var(--u));
  --fs-head:  calc(24px * var(--u));
  --fs-code:  calc(13px * var(--u));
  --fs-small: calc(11.5px * var(--u));

  /* Furniture metrics — shared so two widgets' toolbars line up. */
  --bar-h:  42px;
  --ctl-h:  28px;
  --pad-x:  14px;

  /* Aliases kept for widgets written against the older names. */
  --font:  var(--font-ui);
  --mono:  var(--font-mono);
  --r:     var(--radius);
  --ink-1: var(--text);
  --ink-2: var(--text-2);
  --ink-3: var(--text-3);
  --ink-4: var(--text-3);
}
/* ── Reset ────────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; overflow: hidden; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: var(--fs-chrome);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

/* The usual widget shape: a fixed bar on top, everything else filling the rest. */
.bw-shell {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* ── Toolbar ──────────────────────────────────────────────────────────── */

.bw-toolbar {
  flex: 0 0 auto;
  height: var(--bar-h);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 var(--pad-x);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.bw-toolbar-title {
  font-size: var(--fs-title);
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
  flex-shrink: 0;
}

.bw-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 3px;
  flex-shrink: 0;
}

.bw-spacer { flex: 1 1 auto; }

/* ── Buttons ──────────────────────────────────────────────────────────── */

.bw-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: var(--ctl-h);
  padding: 0 11px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: var(--fs-chrome);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--dur), border-color var(--dur), color var(--dur);
}
.bw-btn:hover:not(:disabled) {
  background: var(--bg-subtle);
  border-color: var(--border-med);
}
.bw-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.bw-btn--primary {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}
.bw-btn--primary:hover:not(:disabled) {
  background: var(--text-2);
  border-color: var(--text-2);
}

.bw-btn--quiet {
  border-color: transparent;
  background: none;
  color: var(--text-2);
}
.bw-btn--quiet:hover:not(:disabled) { background: var(--accent-bg); color: var(--text); }

/* Selected member of a toggle group — view switchers, mode pickers. */
.bw-btn.is-active {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}
.bw-btn.is-active:hover:not(:disabled) { background: var(--text-2); border-color: var(--text-2); }

.bw-btn--icon { width: var(--ctl-h); padding: 0; }
.bw-btn svg   { width: 14px; height: 14px; flex-shrink: 0; }

/* ── Status pill ──────────────────────────────────────────────────────── */

.bw-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-chrome-sm);
  color: var(--text-2);
  flex-shrink: 0;
}
.bw-status strong { color: var(--text-2); font-weight: 500; }

.bw-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-3);
  flex-shrink: 0;
  transition: background 0.3s;
}
.bw-dot.is-ready { background: var(--ok); }
.bw-dot.is-warn  { background: var(--warn); }
.bw-dot.is-busy  { background: var(--err); animation: bw-blink 0.9s ease-in-out infinite; }
.bw-dot.is-idle  { background: var(--text-3); }

/* ── Content areas ────────────────────────────────────────────────────── */

.bw-main {
  flex: 1 1 auto;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
}

/* A readable measure that grows with the room rather than the viewport. */
.bw-stage {
  max-width: calc(760px * var(--u));
  margin: 0 auto;
  padding: 0 24px;
}

/* Centred single-focus content — a question, a timer, a result. */
.bw-center {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 24px;
  text-align: center;
}

/* ── Typography helpers ───────────────────────────────────────────────── */

.bw-head  { font-size: var(--fs-head); font-weight: 500; line-height: 1.3; letter-spacing: -0.01em; }
.bw-lead  { font-size: var(--fs-lead); font-weight: 500; line-height: 1.35; }
.bw-body  { font-size: var(--fs-body); line-height: 1.55; }
.bw-small { font-size: var(--fs-small); color: var(--text-2); }
.bw-mono  { font-family: var(--font-mono); }

/* Micro caps label — "scan to respond", "waiting for responses". */
.bw-hint {
  font-size: var(--fs-chrome-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  user-select: none;
}

/* Markdown-rendered content shouldn't inherit the reset's stripped margins. */
.bw-md p { margin: 0; }
.bw-md p + p { margin-top: 0.6em; }
.bw-md code { font-family: var(--font-mono); font-size: 0.92em; }
.bw-md .katex { font-size: 1em; }

/* ── Form controls ────────────────────────────────────────────────────── */

.bw-input,
.bw-select,
.bw-textarea {
  width: 100%;
  padding: 6px 9px;
  font-family: var(--font-ui);
  font-size: var(--fs-chrome);
  color: var(--text);
  background: var(--bg-subtle);
  border: 1px solid var(--border-med);
  border-radius: var(--radius);
  transition: border-color var(--dur);
}
.bw-input:focus,
.bw-select:focus,
.bw-textarea:focus { outline: none; border-color: var(--accent); }
.bw-textarea { font-family: var(--font-mono); line-height: 1.45; resize: vertical; }

/* ── Card ─────────────────────────────────────────────────────────────── */
/* A block of content set off from the page: a summary, a response, a result. */

.bw-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 15px;
}
.bw-card--lg { padding: 22px 26px; border-radius: var(--radius-lg); }
.bw-card-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-chrome-sm);
  color: var(--text-3);
  margin-top: 8px;
}

/* ── Banner ───────────────────────────────────────────────────────────── */

.bw-banner {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 10px 8px 12px;
  border: 1px solid var(--border-med);
  border-left: 3px solid var(--text-3);
  border-radius: var(--radius);
  background: var(--bg-subtle);
  font-size: var(--fs-chrome);
  line-height: 1.5;
  color: var(--text-2);
}
.bw-banner--warn  { border-left-color: var(--warn); }
.bw-banner--error { border-left-color: var(--err); background: var(--err-bg); }
.bw-banner strong { color: var(--text); font-weight: 600; }
.bw-banner code   { font-family: var(--font-mono); font-size: 0.92em; color: var(--text); }

/* ── Loading & empty states ───────────────────────────────────────────── */

.bw-boot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 64px 20px;
  color: var(--text-2);
  text-align: center;
}
.bw-boot-msg { font-size: var(--fs-body); }
.bw-boot-sub { font-size: var(--fs-chrome-sm); color: var(--text-3); }

.bw-spinner {
  width: 26px;
  height: 26px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: bw-spin 0.65s linear infinite;
}

.bw-empty {
  font-size: var(--fs-body);
  color: var(--text-2);
  line-height: 1.5;
  text-align: center;
}

/* ── Scrollbars ───────────────────────────────────────────────────────── */

.bw-main::-webkit-scrollbar { width: 10px; height: 10px; }
.bw-main::-webkit-scrollbar-thumb {
  background: var(--border-med);
  border: 3px solid var(--bg);
  border-radius: 5px;
}
.bw-main::-webkit-scrollbar-thumb:hover { background: var(--text-3); }
.bw-main::-webkit-scrollbar-track { background: transparent; }

/* ── Motion ───────────────────────────────────────────────────────────── */

@keyframes bw-spin  { to { transform: rotate(360deg); } }
@keyframes bw-blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }

@media (prefers-reduced-motion: reduce) {
  .bw-spinner { animation-duration: 2s; }
  .bw-dot.is-busy { animation: none; }
}

/* ── Injected top bar ─────────────────────────────────────────────────────
   Built by the settings kit inside every widget iframe (see
   widget-settings-kit.js), so every widget carries the same bar without
   drawing one itself — title on the left, the widget's own controls next to
   it, shared utilities pinned right.

   The kit also wraps whatever the widget rendered into .bw-topbar-body, so
   the bar can never overlap it. Everything here is chrome: fixed size
   whatever --u is, so raising the presentation scale grows the content and
   leaves the furniture alone.
   ====================================================================== */

body.bw-has-topbar {
  display: flex;
  flex-direction: column;
  padding: 0;
}

.bw-topbar {
  flex: 0 0 auto;
  height: var(--bar-h);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 var(--pad-x);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  font-size: var(--fs-chrome);
  user-select: none;
}

.bw-topbar-title {
  font-size: var(--fs-title);
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 40%;
  flex-shrink: 0;
}

/* Where a widget's own buttons land (BeamerWidget.topbar.addButton). Takes the
   slack so the utilities stay pinned right however many buttons there are. */
.bw-topbar-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
}

/* Shared utilities — same controls, same place, in every widget. */
.bw-topbar-utils {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
}

/* The widget's own content, below the bar. */
.bw-topbar-body {
  flex: 1 1 auto;
  min-height: 0;
  position: relative;
  overflow: hidden;
}

/* Font size stepper — drives --u, which every content-sized token is built on. */
.bw-fontsize {
  display: flex;
  align-items: center;
  gap: 2px;
}
.bw-fontsize .bw-btn { font-variant-numeric: tabular-nums; }
.bw-fontsize-a-sm { font-size: 10px; font-weight: 600; }
.bw-fontsize-a-lg { font-size: 14px; font-weight: 600; }

/* ── No native control ornaments ──────────────────────────────────────────
   Spinner arrows on number inputs and the chevron on a select are drawn by
   the browser at its own size and colour. Next to flat chrome on a projected
   slide they read as clutter, so they're removed everywhere rather than
   per widget.
   ====================================================================== */

select,
.bw-select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: none;
}
select::-ms-expand { display: none; }

input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* The disclosure triangle on <details>, for the same reason. */
summary { list-style: none; cursor: pointer; }
summary::-webkit-details-marker { display: none; }

/* Search inputs get a cancel "x" and decoration in WebKit. */
input[type="search"]::-webkit-search-decoration,
input[type="search"]::-webkit-search-cancel-button,
input[type="search"]::-webkit-search-results-button { -webkit-appearance: none; }