/* Bounded Python Lab theme. Shared colors come from css/cinematic.css.
   Existing workspace selectors and responsive flows are preserved. */

.learning-quiz {
  margin-block: 2rem;
  margin-inline: auto;
  max-width: 1100px;
  padding: clamp(1rem, 4vw, 2rem);
  background: var(--void-2);
  color: var(--ice);
  border: 1px solid color-mix(in srgb, var(--steel) 35%, transparent);
  border-radius: .75rem;
  min-width: 0;
}
.learning-quiz :where(h2, h3, legend, strong) { color: var(--ice); }
.learning-quiz :where(p, span) { color: var(--ice); }
.learning-quiz fieldset {
  min-width: 0;
  margin-block: 1.5rem;
  padding: 1rem;
  border: 1px solid color-mix(in srgb, var(--steel) 35%, transparent);
  border-radius: .5rem;
}
.learning-quiz legend { padding-inline: .25rem; font-weight: 600; }
.learning-quiz label {
  display: flex;
  gap: .75rem;
  align-items: start;
  margin-block: .5rem;
  padding: .6rem;
  cursor: pointer;
  background: var(--void-3);
  border-radius: .375rem;
  transition: background .25s cubic-bezier(.16,1,.3,1);
}
.learning-quiz label:hover { background: color-mix(in srgb, var(--coral) 12%, var(--void-3)); }
.learning-quiz input { flex: none; margin-top: .4rem; accent-color: var(--coral); }
.learning-quiz :where(span, p, legend, strong, a) { overflow-wrap: anywhere; }
.learning-quiz label span { white-space: pre-line; }
.learning-quiz pre { max-width: 100%; white-space: pre-wrap; background: var(--void); color: var(--ice); }
.learning-quiz li { margin-block: 1.25rem; }
.learning-quiz :where(a, button, input):focus-visible { outline: 2px solid var(--coral); outline-offset: 4px; }
.learning-quiz .btn-primary { margin-block: .5rem; margin-inline-end: .75rem; min-height: 44px; background: color-mix(in srgb, var(--coral) 70%, var(--void)); color: var(--ice); }
.learning-quiz .btn-ghost { margin-block: .5rem; min-height: 44px; }
.learning-quiz .learning-quiz__save { color: var(--steel); }

body.python-course {
  --bg: var(--void);
  --panel: var(--void-2);
  --panel-2: var(--void-3);
  --well: var(--void);
  --text: var(--ice);
  --muted: var(--steel);
  --accent: var(--coral);
  /* Legacy semantic aliases remain for existing runner/notes/tutor selectors. */
  --green: var(--gold);
  --rose: var(--coral);
  --purple: var(--gold);
  --radius: .75rem;
  --action-fill: color-mix(in srgb, var(--coral) 60%, var(--void));
  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, "SFMono-Regular", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 var(--font-body);
}

h1, h2, h3 {
  font-family: var(--font-body);
  color: var(--ice);
  font-weight: 600;
}

h1 { font-family: var(--font-display); font-weight: 400; font-size: clamp(2.5rem, 5vw, 3.5rem); letter-spacing: .015em; line-height: 1.1; margin: .6rem 0 .9rem; }
h2 { font-size: 1.4rem; line-height: 1.25; margin: 2.4rem 0 .8rem; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 .4rem; }

p, li { max-width: 68ch; color: var(--text); }
a { color: var(--cyan); }

code, kbd, samp, pre { font-family: var(--font-mono); }
code { font-size: .92em; }

pre {
  overflow: auto;
  padding: 1rem;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
}

pre code { font-size: .84rem; }

.wrap {
  max-width: 860px;
  margin: auto;
  padding: 2.5rem 1.5rem 4rem;
}

.eyebrow {
  font: 700 11px/1 var(--font-mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 9;
  padding: .55rem .8rem;
  background: var(--accent);
  color: var(--void);
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus { top: 1rem; }

:where(a, button, input, select, textarea, summary, pre):focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 2px;
}

/* One grain layer, and the same restrained header used by native Python Studio. */
.python-course::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.72' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23grain)'/%3E%3C/svg%3E");
  z-index: 0;
}
.python-topbar, main, .python-footer { position: relative; }
.python-topbar, .python-footer { z-index: 1; }
.python-topbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .65rem 1rem; padding: 1rem clamp(1.25rem, 4vw, 3rem); border-bottom: 1px solid var(--line); }
.python-brand { display: flex; flex-wrap: wrap; gap: .8rem; font-family: var(--font-display); font-size: 1.7rem; color: var(--ice); text-decoration: none; }
.python-brand span { border-left: 1px solid var(--gold); padding-left: .8rem; color: var(--steel); font-family: var(--font-body); font-size: .9rem; align-self: center; }
.python-topbar nav, .python-footer { display: flex; flex-wrap: wrap; gap: .5rem .75rem; }
.python-topbar nav a, .python-footer a { display: inline-flex; align-items: center; min-height: 44px; font-size: .85rem; color: var(--ice); text-underline-offset: .25rem; }
.python-topbar nav a[aria-current] { color: var(--coral); }
.python-study-guide { flex-basis: 100%; min-width: 0; border-top: 1px solid var(--line); }
.python-study-guide summary { cursor: pointer; min-height: 44px; padding-block: .55rem; font-size: .85rem; color: var(--steel); }
.python-study-guide summary:hover { color: var(--coral); }
.python-study-guide__content { display: grid; gap: 1rem 2rem; padding-block: .5rem 1rem; }
.python-study-guide__content h2 { font-family: var(--font-body); font-size: 1rem; margin: 0 0 .5rem; }
.python-study-guide__content p { margin: 0; font-size: .9rem; max-width: 65ch; }
.python-footer { max-width: 1200px; margin-inline: auto; padding: 1.5rem clamp(1.25rem, 4vw, 3rem) 8rem; border-top: 1px solid var(--line); }
.python-footer p { flex-basis: 100%; margin: 0; color: var(--steel); font-size: .85rem; }
.python-course :where(a, button, summary) { transition: color .25s cubic-bezier(.16,1,.3,1), background .25s cubic-bezier(.16,1,.3,1), border-color .25s cubic-bezier(.16,1,.3,1); }
.python-course a:hover { color: var(--coral); }
.python-course :where(button, select) { min-height: 44px; }
.python-course :where(button, select, textarea) { border-radius: .375rem; }
.python-course :where(input, select, textarea) { color-scheme: dark; }
.python-course :where(section, h2, details, [data-lab-practical-id]) { scroll-margin-top: 1.5rem; }
@media (min-width: 768px) {
  .python-course::before { opacity: .055; }
  .python-study-guide__content { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ── Dashboard orientation: one obvious start, one visible route ───── */

.pylab-start-here {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem 1.5rem;
  align-items: center;
  margin-top: 1.4rem;
  padding: 1rem 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
}
.pylab-start-here h2 { margin: .35rem 0 .3rem; font-size: 1.15rem; }
.pylab-start-here p { margin: 0; color: var(--muted); font-size: .92rem; }
.pylab-course-path {
  margin: 1.5rem 0;
  padding: 1.15rem 1.3rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: 12px;
}
.pylab-course-path h2 { margin: .55rem 0 1rem; }
.pylab-course-path__weeks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
.pylab-course-path__weeks article { padding: .9rem; background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; }
.pylab-course-path__weeks span { color: var(--cyan); font: 700 11px/1.4 var(--font-mono); text-transform: uppercase; letter-spacing: .06em; }
.pylab-course-path__weeks strong { display: block; margin: .45rem 0; color: var(--text); }
.pylab-course-path__weeks p { margin: 0; color: var(--muted); font-size: .88rem; }

.pylab-lesson-route {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  padding: .7rem .8rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  color: var(--muted);
  font: 700 11px/1.5 var(--font-mono);
}
.pylab-lesson-route a { color: var(--text); text-underline-offset: 3px; }
.pylab-lesson-route a:hover { color: var(--cyan); }

/* ── Read-aloud ────────────────────────────────────────────────────── */

.pylab-reader {
  display: flex;
  align-items: center;
  gap: .7rem;
  flex-wrap: wrap;
  margin: 1rem 0 0;
  padding: .7rem .9rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.pylab-reader__toggle, .pylab-reader__stop {
  padding: .5rem .8rem;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: 700 .82rem/1.2 var(--font-body);
  cursor: pointer;
}
.pylab-reader__toggle { border-color: var(--cyan); color: var(--cyan); }
.pylab-reader__voice-label {
  display: flex;
  align-items: center;
  gap: .4rem;
  color: var(--muted);
  font: 12px/1.4 var(--font-mono);
}
.pylab-reader__voice, .pylab-reader__rate {
  padding: .4rem .5rem;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
}
.pylab-reader__voice { max-width: 220px; }
.pylab-reader__status { color: var(--muted); font: 12px/1.4 var(--font-mono); }
.pylab-reading { outline: 2px solid var(--cyan); outline-offset: 4px; border-radius: 6px; }

/* ── Lesson rhythm: recall → one idea → the three steps ─────────────── */

.lesson-recall,
.lesson-idea,
.lesson-steps,
.mounts {
  margin: 1.5rem 0;
  padding: 1.15rem 1.3rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.lesson-recall { border-left: 3px solid var(--cyan); }
.lesson-idea { border-left: 3px solid var(--accent); }
.lesson-steps { border-left: 3px solid var(--green); }

.lesson-recall p:last-child,
.lesson-idea p:last-child { margin-bottom: 0; }

.lesson-recall summary {
  cursor: pointer;
  color: var(--cyan);
  font: 12px/1.5 var(--font-mono);
  margin: .4rem 0 1rem;
}
.lesson-recall summary:hover { color: var(--accent); }
.lesson-recall details p { margin: .5rem 0 1rem; }

.lesson-idea .lesson-idea__key {
  margin: 1.1rem 0;
  padding: .85rem 1rem;
  background: var(--panel-2);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
}

.lesson-steps ol { margin: .7rem 0 0; padding-left: 1.3rem; }
.lesson-steps li { margin-bottom: .5rem; }
.lesson-steps li strong { color: var(--ice); }

/* ── Go deeper — optional external resources ─────────────────────────── */

.lesson-resources { border-left: 3px solid var(--rose); }
.lesson-resources p:last-of-type { margin-bottom: 0; }
.lesson-resources__links { list-style: none; margin: .8rem 0 0; padding: 0; display: grid; gap: .5rem; }
.lesson-resources__links a { font-weight: 700; }

/* ── Progress: dashboard bar + per-lesson complete/stuck controls ────── */

.pylab-progress { margin-top: 1.2rem; }

.pylab-continue__link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.1rem;
  background: var(--action-fill);
  color: var(--ice);
  font: 700 .92rem/1.2 var(--font-body);
  border-radius: .375rem;
  text-decoration: none;
}
.pylab-continue__link:hover { filter: brightness(1.08); }
.progress-bar {
  height: 8px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  overflow: hidden;
}
.progress-bar .fill { height: 100%; width: 0; background: var(--accent); transition: width .3s cubic-bezier(.16,1,.3,1); }
.progress-label { margin: .5rem 0 0; color: var(--muted); font: 12px/1.5 var(--font-mono); }

.lesson-steps li.is-done a::after { content: ' ✓'; color: var(--green); }

.pylab-complete-row {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* ── Notes — draggable per-page scratchpad (ported from human-data-lead) ── */

#pylab-notes { position: fixed; right: 20px; bottom: 20px; z-index: 200; }
.nts-fab {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: .375rem;
  padding: .65rem 1rem;
  font-family: inherit;
  font-size: .8rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 28px color-mix(in srgb, var(--void) 45%, transparent);
  transition: transform .25s cubic-bezier(.16,1,.3,1), border-color .25s cubic-bezier(.16,1,.3,1), color .25s cubic-bezier(.16,1,.3,1), opacity .25s cubic-bezier(.16,1,.3,1);
}
.nts-fab:hover { transform: translateY(-2px); border-color: var(--cyan); color: var(--ice); }
.nts-dot { position: absolute; top: 6px; right: 8px; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); }
#pylab-notes.is-open .nts-fab { opacity: 0; pointer-events: none; }

.nts-panel {
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(400px, calc(100vw - 40px));
  height: min(480px, calc(100vh - 120px));
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px color-mix(in srgb, var(--void) 60%, transparent);
  animation: nts-in .26s cubic-bezier(.16,1,.3,1);
}
.nts-panel[hidden] { display: none; }
@keyframes nts-in { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }
.nts-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .85rem 1rem .85rem 1.1rem; border-bottom: 1px solid var(--line); }
.nts-eyebrow { font: 700 .6rem/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); }
.nts-title { font-size: .88rem; font-weight: 700; color: var(--ice); }
.nts-close { background: none; border: none; color: var(--muted); font-size: .9rem; cursor: pointer; padding: .3rem .4rem; border-radius: 6px; }
.nts-close:hover { color: var(--ice); background: var(--panel-2); }
.nts-text { flex: 1; resize: none; background: var(--well); border: none; padding: 1rem 1.1rem; color: var(--text); font-family: inherit; font-size: .88rem; line-height: 1.65; }
.nts-foot { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .6rem 1rem; border-top: 1px solid var(--line); }
.nts-status { font: .7rem/1.4 var(--font-mono); color: var(--muted); }
.nts-export {
  background: none;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: .35rem .7rem;
  font-family: inherit;
  font-size: .72rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .25s cubic-bezier(.16,1,.3,1), color .25s cubic-bezier(.16,1,.3,1);
}
.nts-export:hover { border-color: var(--cyan); color: var(--cyan); }
@media (max-width: 640px) {
  #pylab-notes { right: 12px; bottom: 12px; }
  .nts-panel { width: calc(100vw - 24px); height: min(70vh, calc(100vh - 100px)); }
  .nts-fab-label { display: none; }
  .nts-fab { padding: .75rem; }
}
@media print { #pylab-notes { display: none; } }

.pylab-complete-btn, .pylab-stuck-btn {
  padding: .55rem .8rem;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: 700 .85rem/1.2 var(--font-body);
  cursor: pointer;
}

.pylab-complete-btn { border-color: var(--green); color: var(--green); }
.pylab-complete-btn.is-on { background: var(--green); border-color: var(--green); color: var(--void); }
.pylab-stuck-btn { border-color: var(--rose); color: var(--rose); }
.pylab-stuck-btn.is-on { background: var(--rose); border-color: var(--rose); color: var(--void); }
.pylab-complete-hint { color: var(--muted); font: 12px/1.5 var(--font-mono); }

.lab-picker { display: grid; gap: .4rem; padding: 1.1rem 1.3rem; }
.lab-picker label,
.lab-editor-label { font-weight: 700; color: var(--text); }

.lab-picker select {
  width: 100%;
  padding: .72rem .8rem;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
}

.lab-sequence {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .55rem;
  margin: 0 0 .9rem;
  padding: 0;
  list-style: none;
}
.lab-sequence button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .65rem;
  align-items: center;
  width: 100%;
  min-height: 72px;
  padding: .7rem;
  text-align: left;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  font: inherit;
  cursor: pointer;
  transition: border-color .25s cubic-bezier(.16,1,.3,1), transform .25s cubic-bezier(.16,1,.3,1), color .25s cubic-bezier(.16,1,.3,1);
}
.lab-sequence button:hover { transform: translateY(-2px); border-color: var(--cyan); color: var(--text); }
.lab-sequence button.is-active { border-color: var(--accent); color: var(--text); }
.lab-sequence button.is-passed { border-color: var(--green); }
.lab-sequence__number {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text);
  font: 700 12px/1 var(--font-mono);
}
.lab-sequence button.is-active .lab-sequence__number { background: var(--accent); border-color: var(--accent); color: var(--well); }
.lab-sequence button.is-passed .lab-sequence__number { background: var(--green); border-color: var(--green); color: var(--well); }
.lab-sequence strong,
.lab-sequence small { display: block; }
.lab-sequence strong { color: inherit; font-size: .82rem; line-height: 1.25; }
.lab-sequence small { margin-top: .25rem; color: var(--muted); font: 10px/1.35 var(--font-mono); text-transform: uppercase; letter-spacing: .04em; }
.lab-next-exercise { border-color: var(--accent); color: var(--accent); }
.lab-next-exercise[hidden] { display: none; }
.lab-next-day {
  display: inline-flex;
  align-items: center;
  padding: .62rem .85rem;
  background: var(--green);
  border: 1px solid var(--green);
  border-radius: 8px;
  color: var(--well);
  font: 700 .9rem/1.2 var(--font-body);
  text-decoration: none;
}
.lab-next-day[hidden] { display: none; }

.lab-prompt { margin: .4rem 0 0; color: var(--text); }
.lab-meta { margin: 0; color: var(--muted); font: 12px/1.5 var(--font-mono); }

.lab-editor {
  display: block;
  width: 100%;
  min-height: 310px;
  margin: .5rem 0 .8rem;
  padding: 1rem;
  resize: vertical;
  background: var(--well);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ice);
  font: 14px/1.65 var(--font-mono);
  tab-size: 4;
}

.lab-controls { display: flex; gap: .6rem; flex-wrap: wrap; }

.lab-controls button,
.lab-tutor-button {
  padding: .62rem .85rem;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: 700 .9rem/1.2 var(--font-body);
  cursor: pointer;
}

.lab-controls [data-lab-run] { border-color: var(--green); color: var(--green); }
.lab-controls [data-lab-stop] { border-color: var(--rose); color: var(--rose); }
.lab-controls button:disabled { opacity: .45; cursor: not-allowed; }

.lab-status {
  min-height: 1.7em;
  margin: 0 0 .8rem;
  color: var(--accent);
  font: 12px/1.5 var(--font-mono);
}

.lab-output,
.lab-error {
  min-height: 82px;
  max-height: 220px;
  margin: 0 0 1rem;
  padding: .8rem;
  white-space: pre-wrap;
  overflow: auto;
  background: var(--well);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
}

.lab-error { color: var(--coral); }

.lab-tutor-button {
  width: 100%;
  border-color: var(--purple);
  color: var(--ice);
}

.mounts { display: flex; gap: 1rem; flex-wrap: wrap; }
.mount { flex: 1 1 220px; color: var(--muted); }

.lab-noscript {
  margin: 1.5rem 0;
  padding: 1.2rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.lab-noscript details { border-top: 1px solid var(--line); padding: .65rem 0; }
.lab-noscript summary { cursor: pointer; font-weight: 700; }

.day-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

/* ── Tutor panel. tutor.js injects this markup into [data-tutor-mount]
      unconditionally, so the track stylesheet has to dress it. ─────────── */

.course-tutor { position: relative; color: var(--text); }

.course-tutor__launcher {
  position: fixed;
  left: 1rem;
  bottom: 1rem;
  z-index: 8;
  border-color: var(--purple);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--void) 60%, transparent);
}

.course-tutor__launcher[aria-expanded="true"] { color: var(--purple); }

.course-tutor__panel {
  position: fixed;
  left: 1rem;
  bottom: 4.25rem;
  z-index: 8;
  display: grid;
  gap: 1rem;
  width: min(36rem, calc(100vw - 2rem));
  max-height: min(44rem, calc(100vh - 7rem));
  overflow: auto;
  overscroll-behavior: contain;
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--purple);
  border-radius: var(--radius);
  color: var(--text);
  box-shadow: 0 20px 52px color-mix(in srgb, var(--void) 65%, transparent);
}

.course-tutor__panel[hidden] { display: none; }

.course-tutor__header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .65rem 1rem;
  align-items: start;
}

.course-tutor__header h2 { margin: .2rem 0 0; font-size: 1.2rem; }
.course-tutor__header p { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: .82rem; }

.course-tutor__modes { display: flex; gap: .35rem; flex-wrap: wrap; }

.course-tutor button {
  padding: .5rem .7rem;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: 500 .72rem/1 var(--font-mono);
  cursor: pointer;
}

.course-tutor button:hover,
.course-tutor button[aria-pressed="true"] { border-color: var(--purple); color: var(--ice); }
.course-tutor button[disabled] { opacity: .55; cursor: not-allowed; }

.course-tutor__selection,
.course-tutor__attachment {
  display: flex;
  align-items: center;
  gap: .55rem;
  flex-wrap: wrap;
  padding: .7rem;
  background: var(--panel-2);
  border-left: 2px solid var(--cyan);
}

.course-tutor__selection p {
  flex: 1 1 100%;
  margin: 0;
  color: var(--muted);
  font: .72rem/1.45 var(--font-mono);
  overflow-wrap: anywhere;
}

.course-tutor__attachment { justify-content: space-between; border-left-color: var(--accent); }
.course-tutor__attachment[hidden] { display: none; }
.course-tutor__attachment div { display: grid; min-width: 0; gap: .2rem; }
.course-tutor__attachment strong,
.course-tutor__attachment span { overflow-wrap: anywhere; }
.course-tutor__attachment span { color: var(--muted); font: .68rem/1.4 var(--font-mono); }

.course-tutor__log { display: grid; gap: .6rem; max-height: 28rem; overflow: auto; padding-right: .2rem; }
.course-tutor__panel [data-tutor-context-preview] { max-height: 16rem; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; }

.course-tutor__turn {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: .65rem;
  max-width: none;
  padding: .7rem .8rem;
  background: var(--panel-2);
  border-left: 2px solid var(--cyan);
}

.course-tutor__turn--assistant { border-left-color: var(--purple); }
.course-tutor__turn strong { color: var(--cyan); font: 600 .68rem/1.5 var(--font-mono); text-transform: uppercase; }
.course-tutor__turn--assistant strong { color: var(--ice); }
.course-tutor__turn div { min-width: 0; overflow-wrap: anywhere; }

.course-tutor form { display: grid; gap: .5rem; }
.course-tutor form label { color: var(--muted); font: .72rem/1.3 var(--font-mono); }

.course-tutor textarea {
  width: 100%;
  resize: vertical;
  padding: .75rem;
  background: var(--well);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: .95rem/1.5 var(--font-body);
}

.course-tutor__actions { display: flex; gap: .45rem; flex-wrap: wrap; }
.course-tutor__status { min-height: 1.4em; margin: 0; color: var(--muted); font: .72rem/1.45 var(--font-mono); }

.course-tutor [data-tutor-hub-login] {
  justify-self: start;
  padding: .65rem .8rem;
  border: 1px solid var(--accent);
  border-radius: .375rem;
  color: var(--text);
  font: 600 .85rem/1.4 var(--font-body);
  text-decoration: none;
  transition: border-color .25s cubic-bezier(.16,1,.3,1), color .25s cubic-bezier(.16,1,.3,1);
}
.course-tutor [data-tutor-hub-login]:hover { color: var(--accent); }
.course-tutor [data-tutor-hub-login]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.course-tutor [data-tutor-hub-login][hidden] { display: none; }
.course-tutor [data-tutor-save-status] { margin: 0; color: var(--text); font-size: .85rem; }

/* ── Narrow screens ─────────────────────────────────────────────────── */

@media (max-width: 760px) {
  .wrap { padding-left: 1rem; padding-right: 1rem; }
  .lesson-idea pre {
    overflow-x: visible;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }
  .pylab-start-here { grid-template-columns: 1fr; }
  .pylab-start-here .pylab-continue__link { justify-content: center; }
  .pylab-course-path__weeks { grid-template-columns: 1fr; }
  .lab-sequence { grid-template-columns: 1fr; }
  .day-nav { flex-direction: column; }
  .course-tutor__launcher { left: .75rem; bottom: .75rem; }
  .course-tutor__panel { left: 0; bottom: 0; width: 100%; max-height: min(78vh, 44rem); border-radius: 0; }
}

/* ════════════════════════════════════════════════════════════════════
   Studio redesign — split-screen lesson, route-map dashboard,
   review days. Everything below is the 2026-09 rebuild; tokens and
   type come from :root above.
   ════════════════════════════════════════════════════════════════════ */

/* display rules below (grid/flex) would otherwise defeat the hidden attribute */
body.python-course [hidden] { display: none; }

.studio-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ── Lesson header bar ─────────────────────────────────────────────── */

main.studio { display: block; }

.studio-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  padding: 12px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.studio-bar__lead {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  min-width: 0;
  flex: 0 1 auto;
}

.studio-bar__back {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
}
.studio-bar__back:hover { color: var(--cyan); }

.studio-bar__eyebrow {
  font: 700 11px/1 var(--font-mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
}

h1.studio-bar__topic {
  margin: 0;
  font: 400 1.65rem/1.2 var(--font-display);
  color: var(--ice);
  white-space: normal;
  overflow-wrap: anywhere;
}

.studio-bar__lesson-state {
  color: var(--muted);
  font: 600 12px/1.3 var(--font-mono);
  white-space: nowrap;
}

.studio-stop-point {
  margin: 0;
  padding: 10px 24px;
  max-width: none;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
  color: var(--green);
  font-size: 14px;
  text-align: center;
}

.studio-bar__pills { display: flex; justify-content: flex-end; gap: 8px; }

.studio-pill {
  padding: 6px 10px;
  background: none;
  border: 1px solid var(--line);
  border-radius: .375rem;
  color: var(--cyan);
  font: 600 12px/1.2 var(--font-mono);
  cursor: pointer;
  white-space: nowrap;
}
.studio-pill--tutor { color: var(--purple); }
.studio-pill--stuck { color: var(--rose); border-color: var(--rose); }
.studio-pill:hover { border-color: currentColor; }

/* The stepper: lab.js's .lab-sequence, restyled into the chip row.
   It lives inside .lab-picker, which the studio header hosts. */

.studio-bar .lab-picker {
  display: flex;
  align-items: center;
  padding: 0;
  gap: 0;
  min-width: 0;
  flex: 0 1 auto;
}
.studio-bar .lab-picker label { display: none; }

.studio-bar .lab-sequence {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.studio-bar .lab-sequence li { display: flex; align-items: center; }
.studio-bar .lab-sequence li:not(:last-child)::after {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--line);
}
.studio-bar .lab-sequence li:has(button.is-passed):not(:last-child)::after { background: var(--green); }

.studio-bar .lab-sequence button {
  display: flex;
  align-items: center;
  gap: 8px;
  width: auto;
  min-height: 0;
  padding: 7px 12px;
  background: none;
  border: 1px solid var(--line);
  border-radius: .375rem;
  color: var(--muted);
  font: 600 12px/1.2 var(--font-mono);
  cursor: pointer;
  /* Switch foreground/fill together; cross-fading them loses text contrast. */
  transition: border-color .25s cubic-bezier(.16,1,.3,1);
  transform: none;
}
.studio-bar .lab-sequence button:hover { transform: none; border-color: var(--cyan); color: var(--text); }
.studio-bar .lab-sequence button.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--void);
}
.studio-bar .lab-sequence button.is-passed {
  background: color-mix(in srgb, var(--gold) 14%, transparent);
  border-color: transparent;
  color: var(--green);
}
.studio-bar .lab-sequence__number {
  width: 18px;
  height: 18px;
  border: 1px solid var(--line);
  color: inherit;
  font: 700 11px/1 var(--font-mono);
}
.studio-bar .lab-sequence button.is-active .lab-sequence__number { background: var(--void); border-color: transparent; color: var(--accent); }
.studio-bar .lab-sequence button.is-passed .lab-sequence__number { background: var(--green); border-color: transparent; color: var(--void); }
.studio-bar .lab-sequence strong { font: inherit; color: inherit; }
.studio-bar .lab-sequence small { display: none; }
.studio-bar .lab-sequence button.is-active small {
  display: inline;
  margin-left: 6px;
  color: inherit;
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0;
  text-transform: none;
}

/* ── Split screen ──────────────────────────────────────────────────── */

.studio-split {
  display: grid;
  grid-template-columns: minmax(320px, 2fr) minmax(0, 3fr);
  align-items: start;
}

.studio-left > *, .studio-left__content > * { min-width: 0; }
.studio-left {
  padding: 26px 30px 40px;
  border-right: 1px solid var(--line);
  min-width: 0;
}
.studio-idea-disclosure > summary { display: none; }
.studio-left__content {
  display: grid;
  gap: 18px;
  align-content: start;
}
.studio-left .lesson-recall,
.studio-left .lesson-idea,
.studio-left .lesson-resources { margin: 0; }
.studio-left .pylab-reader { margin: 0; }

.studio-recall-strip {
  margin: 0;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: 10px;
  color: var(--muted);
  font-size: 13px;
  max-width: none;
}
.studio-recall-strip.is-looked { border-left-color: var(--rose); }

.studio-recall-marks { display: flex; gap: 8px; flex-wrap: wrap; margin-top: .8rem; }
.studio-recall-mark {
  padding: 10px 14px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font: 700 13px/1.2 var(--font-body);
  cursor: pointer;
}
.studio-recall-mark.is-knew { border-color: var(--green); color: var(--green); }
.studio-recall-mark.is-looked { border-color: var(--rose); color: var(--rose); }

.studio-index-boxes {
  display: flex;
  gap: 6px;
  margin: 14px 0;
}
.studio-index-boxes > div {
  flex: 1;
  display: grid;
  gap: 2px;
  justify-items: center;
  padding: 10px 6px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
}
.studio-index-boxes > div > span:first-child { font: 700 11px/1.3 var(--font-mono); color: var(--accent); }
.studio-index-boxes > div > span:last-child { font: 13px/1.3 var(--font-mono); color: var(--green); overflow-wrap: anywhere; }
.studio-index-boxes > div.is-bad { background: none; border: 1px dashed var(--rose); opacity: .8; }
.studio-index-boxes > div.is-bad > span { color: var(--rose); }

.studio-now {
  margin: 0;
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: 12px;
}
.studio-now .lab-prompt { margin: 8px 0 0; color: var(--ice); font-size: 15px; line-height: 1.55; }
.studio-now .lab-meta { margin: 6px 0 0; }
.studio-hint { margin: 8px 0 0; color: var(--muted); font-size: 13px; max-width: none; }

/* ── Editor column ─────────────────────────────────────────────────── */

.studio-right {
  position: sticky;
  top: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  max-height: 100vh;
  min-width: 0;
  background: var(--void-2);
}

.studio-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line);
}
.studio-toolbar__meta {
  display: flex;
  gap: 14px;
  font: 600 12px/1.4 var(--font-mono);
  color: var(--muted);
}
.studio-toolbar__file { color: var(--ice); white-space: nowrap; }
.studio-toolbar .studio-task-brief {
  flex-basis: 100%;
  margin: 0;
  color: var(--ice);
  font: 400 .95rem/1.55 var(--font-body);
  overflow-wrap: anywhere;
}

/* The tutor/notes launchers are fixed-position; their in-flow mount needs no
   card chrome on studio pages. */
.studio .mounts { margin: 0; padding: 0 24px; background: none; border: 0; }
.studio .pylab-complete-row { padding: 0 24px; }
.studio .day-nav { margin: 1.2rem 0 0; padding: 1.2rem 24px 2rem; }

.studio-right .lab-controls { flex-wrap: nowrap; }
.studio-right .lab-controls button {
  padding: 7px 14px;
  font: 700 13px/1.2 var(--font-body);
}
.studio-right .lab-controls [data-lab-run] {
  background: var(--action-fill);
  border-color: var(--coral);
  color: var(--ice);
}

.studio-editor {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  background: var(--well);
  padding: 14px 0;
  min-height: 280px;
}
.studio-gutter {
  color: var(--steel);
  text-align: right;
  padding-right: 12px;
  user-select: none;
  overflow: hidden;
  font: 14px/1.75 var(--font-mono);
}
.studio-editor .lab-editor {
  display: block;
  width: 100%;
  min-height: 0;
  height: 100%;
  margin: 0;
  padding: 0 16px 0 12px;
  resize: none;
  background: var(--well);
  border: 0;
  border-radius: 0;
  color: var(--ice);
  caret-color: var(--accent);
  /* Shared line-height with the gutter keeps numbers aligned to code —
     change both together or not at all. Horizontal scroll, never wrap. */
  font: 14px/1.75 var(--font-mono);
  white-space: pre;
  overflow: auto;
}

/* ── Output panel ──────────────────────────────────────────────────── */

.studio-out {
  display: grid;
  gap: 10px;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  overflow: auto;
  max-height: 44vh;
}
.studio-out__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.studio-out__label {
  font: 700 11px/1.4 var(--font-mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}
.studio-out .lab-status {
  margin: 0;
  min-height: 0;
  text-align: right;
  color: var(--muted);
  font: 600 12px/1.5 var(--font-mono);
}
.studio-out.is-pass .lab-status { color: var(--green); }
.studio-out.is-fail .lab-status { color: var(--accent); }
.studio-out.is-error .lab-status { color: var(--rose); }

.studio-out .lab-output {
  min-height: 56px;
  max-height: 180px;
  margin: 0;
  font: 13px/1.7 var(--font-mono);
}
.studio-out .lab-error {
  min-height: 0;
  max-height: 220px;
  margin: 0;
  font: 12px/1.6 var(--font-mono);
  color: var(--coral);
}
.studio-out .lab-error:empty { display: none; }
/* Once a plain-English card is up, the raw traceback lives behind its toggle. */
.studio-out.has-plain .lab-error { display: none; color: var(--muted); background: var(--bg); }
.studio-out.has-plain.show-raw .lab-error { display: block; }

.studio-error-card {
  display: grid;
  gap: 8px;
  padding: 12px 14px;
  background: var(--well);
  border: 1px solid var(--rose);
  border-radius: 10px;
}
.studio-error-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.studio-error-card__head span {
  font: 700 12px/1.4 var(--font-mono);
  color: var(--rose);
}
.studio-error-card__head button {
  padding: 4px 9px;
  background: none;
  border: 1px solid var(--line);
  border-radius: .375rem;
  color: var(--muted);
  font: 600 11px/1.2 var(--font-mono);
  cursor: pointer;
}
.studio-error-card__plain {
  margin: 0;
  color: var(--ice);
  font-size: 14px;
  line-height: 1.6;
  max-width: none;
}

.studio-diff {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.studio-diff__pane {
  min-height: 64px;
  padding: 10px 12px;
  background: var(--well);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: 13px/1.7 var(--font-mono);
  overflow: auto;
}
.studio-diff__label {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.studio-diff__pane div { white-space: pre; }
[data-studio-diff-got] .is-wrong { color: var(--rose); text-decoration: line-through; }
[data-studio-diff-want] div { color: var(--green); }

.studio-out__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 14px;
}
.studio-nudge {
  flex: 1 1 260px;
  min-width: 0;
  color: var(--muted);
  font-size: 13px;
  text-wrap: pretty;
}
.studio-out__actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; flex-shrink: 0; }
.studio-out__actions .lab-tutor-button {
  width: auto;
  padding: 6px 10px;
  font: 700 12px/1.2 var(--font-body);
}
.studio-stuck-btn {
  padding: 6px 10px;
  background: none;
  border: 1px solid var(--rose);
  border-radius: 8px;
  color: var(--rose);
  font: 700 12px/1.2 var(--font-body);
  cursor: pointer;
  white-space: nowrap;
}
.studio-out__actions .lab-next-exercise,
.studio-out__actions .lab-next-day {
  padding: 8px 14px;
  background: var(--green);
  border: 1px solid var(--green);
  border-radius: 8px;
  color: var(--void);
  font: 700 13px/1.2 var(--font-body);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

/* ── Stuck toast ───────────────────────────────────────────────────── */

.studio-toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 9;
  width: min(560px, 92vw);
  display: grid;
  gap: 10px;
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid var(--rose);
  border-radius: .375rem;
  box-shadow: 0 24px 48px color-mix(in srgb, var(--void) 50%, transparent);
}
.studio-toast[hidden] { display: none; }
.studio-toast__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.studio-toast__head span {
  font: 700 11px/1.4 var(--font-mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--rose);
}
.studio-toast__head button {
  background: none;
  border: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}
.studio-toast p { margin: 0; font-size: 14px; line-height: 1.6; max-width: none; }
.studio-toast__actions { display: flex; gap: 8px; flex-wrap: wrap; }
.studio-toast__actions button {
  padding: 9px 13px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: 700 13px/1.2 var(--font-body);
  cursor: pointer;
}
.studio-toast__actions [data-studio-toast-tutor] { border-color: var(--purple); color: var(--ice); }

/* ── Review day (checkpoint pages) ─────────────────────────────────── */

main.studio.is-review .studio-split,
main.studio.is-review .studio-tabs,
main.studio.is-review .studio-mobile-foot { display: none; }

.studio-review {
  max-width: 1100px;
  margin: 0 auto;
  padding: 26px 24px 60px;
  display: grid;
  gap: 22px;
}
.studio-review__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
.studio-review__head .eyebrow { color: var(--cyan); }
.studio-review__count { font: 12px/1.4 var(--font-mono); color: var(--muted); }

.studio-review__cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}
.studio-review-card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.studio-review-card.is-knew { border-color: var(--green); }
.studio-review-card.is-looked { border-color: var(--rose); }
.studio-review-card__label { font: 700 11px/1.4 var(--font-mono); color: var(--muted); text-transform: uppercase; }
.studio-review-card__q { margin: 0; color: var(--ice); font-size: 14px; line-height: 1.5; max-width: none; }
.studio-review-card__a {
  margin: 0;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
  max-width: none;
}
.studio-review-card__marks { display: flex; gap: 6px; flex-wrap: wrap; }
.studio-review-card__marks button {
  padding: 4px 9px;
  background: none;
  border: 1px solid var(--line);
  border-radius: .375rem;
  color: var(--text);
  font: 700 11px/1.4 var(--font-mono);
  cursor: pointer;
}
.studio-review-card__marks [data-studio-review-knew] { border-color: var(--green); color: var(--green); }
.studio-review-card__marks [data-studio-review-looked] { border-color: var(--rose); color: var(--rose); }
.studio-review-card.is-knew [data-studio-review-knew] { background: color-mix(in srgb, var(--gold) 16%, transparent); }
.studio-review-card.is-looked [data-studio-review-looked] { background: color-mix(in srgb, var(--coral) 16%, transparent); }

.studio-review__columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 14px;
}
.studio-review__panel {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.studio-review__panel--rebuild { border-color: var(--accent); }
.studio-review__panel--rebuild .eyebrow { color: var(--accent); }
.studio-review__panel .eyebrow { color: var(--muted); }
.studio-review__panel p { margin: 0; max-width: none; }
.studio-review__lede { color: var(--ice); font-size: 15px; line-height: 1.6; }
.studio-review__note { color: var(--muted); font-size: 13px; line-height: 1.55; }

.studio-honesty { display: grid; gap: 8px; font-size: 14px; }
.studio-honesty__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}
.studio-honesty__bar { height: 6px; border-radius: 3px; background: var(--line); }
.studio-honesty__note { grid-column: 1 / -1; font: 11px/1.4 var(--font-mono); color: var(--muted); }
@media (min-width: 768px) {
  .studio-honesty__row { grid-template-columns: 110px minmax(0, 1fr) auto; }
  .studio-honesty__note { grid-column: auto; }
}
.studio-honesty__note.is-knew { color: var(--green); }
.studio-honesty__note.is-looked { color: var(--rose); }

.studio-review__actions { display: flex; gap: 8px; flex-wrap: wrap; }
.studio-review__actions button {
  padding: 11px 16px;
  border-radius: 10px;
  font: 700 14px/1.2 var(--font-body);
  cursor: pointer;
}
[data-studio-review-start] { background: var(--accent); border: 1px solid var(--accent); color: var(--void); }
[data-studio-review-stuck] { background: none; border: 1px solid var(--rose); color: var(--rose); }

/* ── Tablet stack and phone tab flow ───────────────────────────────── */

.studio-tabs, .studio-mobile-foot { display: none; }

@media (max-width: 899px) {
  .studio-split { grid-template-columns: 1fr; }
  .studio-left { border-right: 0; padding: 20px 18px 32px; }
  .studio-right { position: static; max-height: none; }
  .studio-out { max-height: none; }
  .studio-editor { min-height: 260px; }
  .studio-editor .lab-editor, .studio-gutter { font: 13px/1.75 var(--font-mono); }
}
@media (min-width: 640px) and (max-width: 899px) {
  .studio-left { padding-bottom: 18px; }
  .studio-idea-disclosure {
    display: block;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
  }
  .studio-idea-disclosure > summary {
    display: flex;
    min-height: 44px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text);
    font-weight: 700;
    cursor: pointer;
  }
  .studio-idea-disclosure > summary span {
    color: var(--muted);
    font: 500 12px/1.3 var(--font-body);
  }
  .studio-idea-disclosure[open] > summary {
    border-bottom: 1px solid var(--line);
  }
  .studio-left__content { padding: 18px; }
}

@media (max-width: 639px) {
  main.studio { padding-bottom: 96px; }
  .studio-editor { grid-template-columns: minmax(0, 1fr); }
  .studio-gutter { display: none; }
  .studio-editor .lab-editor {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    overflow-x: hidden;
  }
}

/* Tablet landscape: the split stays, the editor gets the wider column. */
@media (min-width: 900px) and (max-width: 1180px) {
  .studio-split { grid-template-columns: minmax(420px, 44%) minmax(0, 1fr); }
  .studio-editor .lab-editor, .studio-gutter { font: 13px/1.75 var(--font-mono); }
}

/* Tablet portrait: stacked lesson, idea panel can fold away. */
.studio-idea-fold > summary { display: none; }
.studio-idea-fold > summary::after { content: " ▾"; }
.studio-idea-fold:not([open]) > summary::after { content: " ▸"; }
@media (min-width: 641px) and (max-width: 899px) {
  .studio-idea-fold > summary {
    display: block;
    padding: 12px 18px;
    cursor: pointer;
    font: 700 13px/1.2 var(--font-mono);
    color: var(--cyan);
    border-bottom: 1px solid var(--line);
  }
}

.studio-bar__clock { font: 600 12px/1.2 var(--font-mono); color: var(--muted); }
.studio-bar__clock:empty { display: none; }

/* Phones keep the three-tab flow and the fixed footer bar. */
@media (max-width: 640px) {
  main.studio { padding-bottom: 96px; }
  .studio-tabs:not([hidden]) {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    background: var(--void-2);
    border-bottom: 1px solid var(--line);
  }
  .studio-tabs button {
    padding: 13px 6px;
    background: none;
    border: 0;
    border-bottom: 2px solid transparent;
    color: var(--muted);
    font: 700 13px/1.2 var(--font-body);
    cursor: pointer;
  }
  .studio-tabs button.is-active { color: var(--ice); border-bottom-color: var(--accent); }

  main.studio[data-studio-tab="idea"] .studio-right { display: none; }
  main.studio[data-studio-tab="code"] .studio-left { display: none; }
  main.studio[data-studio-tab="code"] .studio-out { display: none; }
  main.studio[data-studio-tab="out"] .studio-left { display: none; }
  main.studio[data-studio-tab="out"] .studio-editor { display: none; }

  .studio-mobile-foot:not([hidden]) {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 8;
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 12px 16px 18px;
    background: var(--panel);
    border-top: 1px solid var(--line);
  }
  .studio-mobile-foot .studio-pill { min-height: 44px; padding: 12px 14px; font: 700 13px/1.2 var(--font-body); }
  .studio-foot-primary {
    flex: 1;
    min-height: 44px;
    padding: 12px 16px;
    background: var(--green);
    border: 1px solid var(--green);
    border-radius: 10px;
    color: var(--void);
    font: 700 15px/1.2 var(--font-body);
    cursor: pointer;
  }
  main.studio[data-studio-tab="idea"] .studio-foot-primary { background: var(--accent); border-color: var(--accent); color: var(--void); }

  /* Notes and tutor launchers sit above the footer bar */
  #pylab-notes { bottom: 84px; }
  .course-tutor__launcher { bottom: 5.5rem; }
  .studio-toast { bottom: 88px; }
}

@media (max-width: 1179px) {
  main.studio button,
  main.studio select,
  main.studio summary,
  main.studio .studio-bar__back,
  main.studio .lab-next-day {
    min-height: 44px;
  }
  main.studio .studio-bar__back {
    display: inline-flex;
    align-items: center;
  }
  .studio-bar .lab-sequence button { min-height: 44px; }
}

/* ── Route map dashboard ───────────────────────────────────────────── */

.pylab-map { max-width: 1180px; margin: 0 auto; padding: 34px 28px 80px; }

.pylab-map__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.pylab-map__top h1 { margin: 10px 0 6px; font-size: clamp(2.75rem, 5vw, 4rem); }
.pylab-map__top > [data-readiness-entry] { order: 3; flex-basis: 100%; margin: 0; color: var(--muted); font-size: .92rem; }
.pylab-map__top > div:first-child p { margin: 0; color: var(--muted); max-width: 60ch; font-size: 15px; }

.pylab-map__meta {
  display: grid;
  gap: 6px;
  justify-items: end;
  font: 600 12px/1.5 var(--font-mono);
  color: var(--muted);
}
.pylab-map__meta .pylab-progress { margin: 0; width: 220px; }
.pylab-map__meta .progress-label { text-align: right; }
.pylab-map__done { color: var(--green); }

.pylab-map .pylab-start-here { margin-top: 26px; padding: 18px 20px; }
.pylab-map .pylab-start-here h2 { font: 600 1.25rem/1.3 var(--font-body); margin: 8px 0 4px; }
.pylab-away-note {
  margin-top: 8px;
  color: var(--accent);
  font-size: 13px;
}
.pylab-continue__link.is-gated {
  background: none;
  border: 1px solid var(--line);
  color: var(--steel);
}

/* Recall gate card */
.pylab-gate {
  display: grid;
  gap: 12px;
  margin-top: 14px;
  padding: 18px 20px;
  background: var(--panel);
  border: 1px solid var(--cyan);
  border-radius: 12px;
}
.pylab-gate[hidden] { display: none; }
.pylab-gate__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.pylab-gate__head .eyebrow { color: var(--cyan); }
.pylab-gate__from { font: 12px/1.4 var(--font-mono); color: var(--muted); }
.pylab-gate__q {
  margin: 0;
  font: 600 1.15rem/1.4 var(--font-body);
  color: var(--ice);
  max-width: none;
  text-wrap: pretty;
}
.pylab-gate__a {
  margin: 0;
  padding: 12px 14px;
  background: var(--well);
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.6;
  max-width: none;
}
.pylab-gate__actions { display: flex; gap: 8px; flex-wrap: wrap; }
.pylab-gate__actions button {
  padding: 10px 14px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font: 700 13px/1.2 var(--font-body);
  cursor: pointer;
}
.pylab-gate__actions [data-pylab-gate-knew] { border-color: var(--green); color: var(--green); }
.pylab-gate__actions [data-pylab-gate-looked] { border-color: var(--rose); color: var(--rose); }
.pylab-gate__note { margin: 0; font-size: 13px; color: var(--muted); max-width: none; }

/* Week rows */
.pylab-map .pylab-course-path {
  margin: 28px 0 0;
  padding: 0;
  background: none;
  border: 0;
  border-radius: 0;
  display: grid;
  gap: 14px;
}
.pylab-week {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 14px 16px;
  background: var(--void-2);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.pylab-week.is-current { background: var(--void-3); }
.pylab-week__label span { display: block; font: 700 11px/1.4 var(--font-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--cyan); }
.pylab-week__label strong { display: block; margin-top: 2px; font: 600 1rem/1.3 var(--font-body); color: var(--ice); }
.pylab-week__label small { display: block; margin-top: 4px; font: 11px/1.4 var(--font-mono); color: var(--muted); }
.pylab-week__days { display: flex; gap: 10px; flex-wrap: wrap; }

.pylab-day {
  flex: 1 1 150px;
  min-width: 140px;
  padding: 11px 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
}
.pylab-day:hover { border-color: var(--cyan); }
.pylab-day.is-checkpoint { border-radius: .5rem; border-color: var(--cyan); }
.pylab-day.is-done { background: color-mix(in srgb, var(--gold) 8%, transparent); border-color: var(--green); }
.pylab-day.is-now { background: color-mix(in srgb, var(--coral) 12%, transparent); border-color: var(--accent); }
.pylab-day__head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.pylab-day__num { font: 700 10px/1.4 var(--font-mono); letter-spacing: .08em; color: var(--steel); }
.pylab-day.is-checkpoint .pylab-day__num { color: var(--cyan); }
.pylab-day.is-now .pylab-day__num { color: var(--accent); }
.pylab-day__mark { font: 700 11px/1.4 var(--font-mono); color: var(--accent); }
.pylab-day.is-done .pylab-day__mark { color: var(--green); }
.pylab-day.is-stuck .pylab-day__mark { color: var(--rose); }
.pylab-day__title { margin-top: 5px; font: 600 13px/1.3 var(--font-body); color: var(--text); }
.pylab-day.is-done .pylab-day__title, .pylab-day.is-now .pylab-day__title { color: var(--ice); }
.pylab-day__pips { display: flex; gap: 3px; margin-top: 8px; }
.pylab-day__pips span { flex: 1; height: 3px; border-radius: 2px; background: var(--line); }
.pylab-day.is-now .pylab-day__pips span { background: var(--steel); }
.pylab-day .pylab-day__pips span.is-done { background: var(--green); }

@media (max-width: 700px) {
  .pylab-week { grid-template-columns: 1fr; gap: 10px; }
  .pylab-map__meta { justify-items: start; }
  .pylab-map__meta .progress-label { text-align: left; }
}

@media (max-width: 767px) {
  /* Starting is the primary job; the saved-history summary follows the action. */
  .pylab-map { padding-top: 24px; }
  .pylab-map__top { gap: 16px; }
  .pylab-map__top .pylab-start-here { order: 1; margin-top: 0; padding-block: 16px; }
  .pylab-map__top .pylab-map__meta { order: 2; }
}

/* App controls share the native course's two visual treatments. Keep the
   existing semantic classes and state colors; filled actions remain readable. */
body.python-course :is(button, .pylab-continue__link, .lab-next-day) { border-radius: .375rem; }
body.python-course :is([data-lab-run], [data-studio-review-start], .studio-foot-primary, .lab-next-exercise, .lab-next-day) {
  background: var(--action-fill);
  border: 1px solid var(--coral);
  color: var(--ice);
}
body.python-course .studio-mobile-foot .studio-foot-primary { background: var(--action-fill); color: var(--ice); }
body.python-course :is(button, .lab-next-day, .pylab-continue__link):hover { border-color: var(--coral); }
body.python-course :is(.nts-text, .lab-editor):focus-visible { outline: 2px solid var(--coral); outline-offset: -3px; }

body.python-course .lab-artifacts { padding: 1rem; border-top: 1px solid var(--line); min-width: 0; }
body.python-course .lab-artifacts h3 { color: var(--ice); font: 600 1rem/1.4 var(--font-body); margin: 0 0 .5rem; }
body.python-course .lab-artifacts p { color: var(--steel); font: 400 .875rem/1.6 var(--font-body); overflow-wrap: anywhere; }
body.python-course .lab-artifacts button { margin-block: .5rem; min-height: 44px; max-width: 100%; white-space: normal; }
body.python-course .lab-artifacts summary { cursor: pointer; padding-block: .75rem; color: var(--ice); }
body.python-course .lab-artifacts pre { max-width: 100%; overflow: auto; color: var(--ice); background: var(--void-2); padding: .75rem; font: 400 .8rem/1.6 var(--font-mono); }

.python-study-guide dt { font-weight: 600; }
.python-study-guide dd { margin: .25rem 0 1rem; }
.python-topic-search { margin-block: 2rem; padding: 1rem; background: var(--void-2); border: 1px solid var(--line); border-radius: .5rem; }
.python-topic-search h2 { margin-top: 0; }
.python-topic-search label { display: block; margin-bottom: .5rem; }
.python-topic-search input { display: block; width: 100%; max-width: 36rem; min-height: 44px; margin-bottom: .75rem; padding: .65rem; font: inherit; color: var(--ice); background: var(--void-3); border: 1px solid var(--steel); border-radius: .375rem; transition: border-color var(--ease-premium); }
body.python-course .python-topic-search button { min-height: 44px; padding: .5rem .75rem; font: 600 .85rem/1.5 var(--font-body); color: var(--ice); background: transparent; border: 1px solid var(--coral); border-radius: .375rem; }
.python-topic-search a { color: var(--ice); }
.python-topic-search a:hover { color: var(--coral); }
.python-topic-search li { margin-block: .75rem; overflow-wrap: anywhere; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none;
    transition: none;
    scroll-behavior: auto;
  }
}