/* Learn section (learn/ app). Colours come from the site palette in
   catalog/css/style.css; only the few extra tokens below are new. */
.learn {
  --learn-danger: #e08a72;
  --learn-danger-soft: #2c1610;
  --learn-code-bg: #120c07;
  --learn-mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --learn-kw: #e3b466;
  --learn-def: #9fc1d6;
  --learn-num: #d7a6d9;
  max-width: 1320px;
  margin: 0 auto;
}
[data-theme="light"] .learn {
  --learn-danger: #a8432b;
  --learn-danger-soft: #f7e1d8;
  --learn-code-bg: #f9f3e6;
  --learn-kw: #7e561d;
  --learn-def: #2f5f7f;
  --learn-num: #7d3f86;
}

.learn-eyebrow {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.learn-note { font-size: 14px; color: var(--text-muted); margin: 0; }
.learn-muted { color: var(--text-muted); }

/* ---------- Learn index ---------- */
.learn-intro {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  margin-bottom: 28px;
}
.learn-intro .page-subtitle { max-width: 68ch; margin-bottom: 0; }
.learn-intro__emblem { width: 88px; height: 88px; border-radius: 50%; object-fit: cover; }
@media (max-width: 600px) {
  .learn-intro { grid-template-columns: 56px minmax(0, 1fr); gap: 14px; }
  .learn-intro__emblem { width: 56px; height: 56px; }
}

.learn-course {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.learn-course__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: start;
  margin-bottom: 22px;
}
@media (max-width: 760px) { .learn-course__head { grid-template-columns: minmax(0, 1fr); } }
.learn-course__title { font-family: var(--font-serif); font-weight: normal; font-size: 30px; margin: 4px 0 8px; }
.learn-course__desc { margin: 0; color: var(--text-muted); max-width: 64ch; }
.learn-course__cta { display: grid; gap: 12px; justify-items: start; min-width: 240px; }

.learn-progress { display: grid; gap: 6px; width: 100%; font-size: 13px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.learn-progress__track { display: block; height: 6px; border-radius: 999px; background: var(--surface-muted); overflow: hidden; }
.learn-progress__fill { display: block; height: 100%; background: var(--accent); }

/* The collapsible course outline: the whole outline folds away, and each
   part inside it folds again, so the Learn page stays short. Native
   <details>, so it works without JavaScript. */
.learn-menu { border-top: 1px solid var(--border); padding-top: 14px; }
.learn-menu__summary,
.learn-partmenu__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  border-radius: 8px;
  user-select: none;
}
.learn-menu__summary::-webkit-details-marker,
.learn-partmenu__summary::-webkit-details-marker { display: none; }
.learn-menu__summary { padding: 10px 12px; background: var(--surface-muted); border: 1px solid var(--border); }
.learn-menu__summary:hover { border-color: var(--accent); }
.learn-menu__label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.learn-menu__meta { font-size: 13px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.learn-menu__chevron {
  margin-left: auto;
  flex: none;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.2s ease;
}
details[open] > summary > .learn-menu__chevron { transform: rotate(225deg) translate(-2px, -2px); }
.learn-menu__body { display: grid; gap: 6px; margin-top: 10px; }
.learn-partmenu { border: 1px solid var(--border); border-radius: 8px; }
.learn-partmenu[open] { background: color-mix(in srgb, var(--surface-muted) 35%, transparent); }
.learn-partmenu__summary { padding: 10px 12px; flex-wrap: wrap; }
.learn-partmenu__summary:hover { background: var(--surface-muted); }
.learn-partmenu__title { font-family: var(--font-serif); font-size: 17px; color: var(--text); }
.learn-partmenu__range { font-size: 13px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.learn-partmenu__count {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  padding: 1px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
}
.learn-partmenu__level {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 1px 7px;
  border-radius: 999px;
  background: var(--surface-muted);
}
.learn-partmenu__level--intermediate { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.learn-partmenu__level--advanced { color: var(--bg); background: var(--accent); }
.learn-partmenu__level--master { color: var(--accent); background: transparent; box-shadow: inset 0 0 0 1.5px var(--accent); }
.learn-syllabus__level { font-weight: 400; color: var(--text-muted); }
.learn-partmenu__count.is-complete { color: var(--success); border-color: var(--success); }
.learn-partmenu > .learn-outline { padding: 4px 8px 10px; }
.learn-outline__item.is-next { border-color: var(--accent); }
@media (prefers-reduced-motion: reduce) { .learn-menu__chevron { transition: none; } }
@media (max-width: 600px) {
  .learn-partmenu__range { order: 3; flex-basis: 100%; }
}

.learn-part {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 22px 0 8px;
}
.learn-part:first-of-type { margin-top: 0; }
.learn-outline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 6px;
}
.learn-outline__item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  border: 1px solid transparent;
}
.learn-outline__item:hover { background: var(--surface-muted); border-color: var(--border); text-decoration: none; }
.learn-outline__num { font-variant-numeric: tabular-nums; color: var(--text-muted); font-size: 13px; text-align: right; }
.learn-outline__text { min-width: 0; display: grid; }
.learn-outline__title { font-family: var(--font-serif); font-size: 16px; }
.learn-outline__concept { font-size: 13px; color: var(--text-muted); }
.learn-outline__seal { color: var(--success); font-weight: 700; }

/* ---------- Lesson page ---------- */
.learn-crumbs { display: flex; gap: 8px; font-size: 14px; color: var(--text-muted); margin-bottom: 14px; }
.learn-crumbs a { color: var(--accent); }

.learn-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 28px; }
@media (max-width: 900px) { .learn-layout { grid-template-columns: minmax(0, 1fr); gap: 18px; } }

.learn-syllabus__head {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.learn-syllabus__count { font-variant-numeric: tabular-nums; }
.learn-syllabus ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.learn-syllabus__part {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 14px 8px 6px;
}
.learn-syllabus__part:first-child { margin-top: 4px; }
@media (max-width: 900px) {
  .learn-syllabus__list {
    max-height: 220px;
    overflow-y: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 6px;
  }
}
.learn-syllabus__link {
  display: grid;
  grid-template-columns: 20px 16px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  padding: 6px 8px;
  border-radius: 7px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}
.learn-syllabus__link:hover { background: var(--surface-muted); text-decoration: none; }
.learn-syllabus__link[aria-current="page"] { background: var(--accent-soft); }
.learn-syllabus__num { font-size: 12px; color: var(--text-muted); text-align: right; font-variant-numeric: tabular-nums; }
.learn-syllabus__title { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.learn-syllabus__status {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1.5px solid var(--text-muted);
}
.learn-syllabus__link.is-sealed .learn-syllabus__status {
  border-color: var(--success);
  background: var(--success);
  box-shadow: inset 0 0 0 2.5px var(--bg);
}

.learn-stage { min-width: 0; display: grid; gap: 20px; align-content: start; }
.learn-head__title {
  font-family: var(--font-serif);
  font-weight: normal;
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1.15;
  margin: 4px 0 0;
  text-wrap: balance;
}
.learn-panes { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 24px; align-items: start; }
@media (max-width: 1180px) { .learn-panes { grid-template-columns: minmax(0, 1fr); } }

.learn-teaching { min-width: 0; max-width: 70ch; }
.learn-xher { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 14px; }
.learn-xher__emblem { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; }
.learn-xher__name {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.learn-xher__words p, .learn-task p { margin: 0 0 14px; line-height: 1.6; }
.learn-xher__words ul, .learn-task ul { margin: 0 0 14px; padding-left: 20px; display: grid; gap: 4px; }
.learn-teaching code {
  overflow-wrap: anywhere;
  font-family: var(--learn-mono);
  font-size: 0.9em;
  background: var(--surface-muted);
  padding: 1px 5px;
  border-radius: 4px;
}
.learn-teaching pre {
  font-family: var(--learn-mono);
  font-size: 13.5px;
  line-height: 1.6;
  background: var(--learn-code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin: 0 0 14px;
  overflow-x: auto;
}
.learn-teaching pre code { background: none; padding: 0; font-size: inherit; }
.learn-teaching .out-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: -6px 0 4px;
}
.learn-task {
  margin-top: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.learn-task__title { font-family: var(--font-serif); font-weight: normal; font-size: 21px; color: var(--accent); margin: 0 0 8px; }
.learn-hint summary { cursor: pointer; color: var(--text-muted); font-size: 14px; }
.learn-hint p { margin: 8px 0 0; font-size: 14px; }
.learn-schema { margin-top: 14px; padding: 10px 14px; border: 1px solid var(--border, rgba(255,255,255,0.12)); border-radius: 10px; }
.learn-schema summary { cursor: pointer; color: var(--text-muted); font-size: 14px; }
.learn-schema ul { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 6px; }
.learn-schema li { font-size: 14px; line-height: 1.5; }
.learn-schema__table { font-weight: 600; }
.learn-schema__cols { color: var(--text-muted); }
.learn-schema__note { margin: 10px 0 0; font-size: 13px; color: var(--text-muted); }
.learn-pager { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 16px; font-size: 14px; }
.learn-pager a { color: var(--accent); }

.learn-bench { min-width: 0; display: grid; gap: 12px; position: sticky; top: 12px; }
@media (max-width: 1180px) { .learn-bench { position: static; } }
.learn-editor { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--learn-code-bg); }
.learn-editor__bar {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}
.learn-editor__file { font-family: var(--learn-mono); color: var(--text); }
#learnEditor .CodeMirror { height: 320px; font-family: var(--learn-mono); font-size: 14px; background: var(--learn-code-bg); color: var(--text); }
#learnEditor .CodeMirror-gutters { background: var(--learn-code-bg); border-right: 1px solid var(--border); }
#learnEditor .CodeMirror-linenumber { color: var(--text-muted); }
#learnEditor .CodeMirror-cursor { border-left-color: var(--accent-hover); }
#learnEditor .CodeMirror-selected,
#learnEditor .CodeMirror-focused .CodeMirror-selected { background: var(--accent-soft); }
#learnEditor .cm-keyword { color: var(--learn-kw); }
#learnEditor .cm-def, #learnEditor .cm-builtin { color: var(--learn-def); }
#learnEditor .cm-string { color: var(--success); }
#learnEditor .cm-number { color: var(--learn-num); }
#learnEditor .cm-comment { color: var(--text-muted); font-style: italic; }
#learnEditor .cm-variable, #learnEditor .cm-variable-2 { color: var(--text); }
#learnEditor .cm-operator { color: var(--text-muted); }
.learn-editor__fallback {
  display: block;
  width: 100%;
  height: 320px;
  border: 0;
  padding: 12px;
  resize: vertical;
  font-family: var(--learn-mono);
  font-size: 14px;
  background: var(--learn-code-bg);
  color: var(--text);
  tab-size: 4;
}

.learn-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.learn-actions .btn:disabled { opacity: 0.5; cursor: progress; }
.learn-reset { margin-right: auto; }
.learn-runtime { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-muted); }
.learn-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); }
.learn-dot.is-ok { background: var(--success); }
.learn-dot.is-bad { background: var(--learn-danger); }
.learn-dot.is-wait { background: var(--accent); animation: learn-pulse 1.2s ease-in-out infinite; }
@keyframes learn-pulse { 50% { opacity: 0.35; } }
@media (prefers-reduced-motion: reduce) { .learn-dot.is-wait { animation: none; } }

.learn-console { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.learn-console__head {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.learn-console pre {
  margin: 0;
  padding: 12px;
  min-height: 64px;
  max-height: 240px;
  overflow: auto;
  font-family: var(--learn-mono);
  font-size: 13.5px;
  white-space: pre-wrap;
  word-break: break-word;
}
.learn-console pre.is-error, .learn-error { color: var(--learn-danger); }

.learn-verdict { border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; background: var(--surface); }
.learn-verdict.is-pass { border-color: var(--success); background: var(--success-soft); }
.learn-verdict.is-fail { border-color: var(--learn-danger); background: var(--learn-danger-soft); }
.learn-verdict__say { display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 10px; align-items: start; }
.learn-verdict__say p { margin: 3px 0 0; }
.learn-verdict__sigil {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-size: 15px;
}
.learn-verdict__list { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; }
.learn-verdict__list li { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 8px; font-size: 14px; }
.learn-verdict__mark { font-weight: 700; }
.learn-verdict__list .is-ok .learn-verdict__mark { color: var(--success); }
.learn-verdict__list .is-no .learn-verdict__mark { color: var(--learn-danger); }
.learn-verdict__list pre {
  margin: 6px 0 0;
  font-family: var(--learn-mono);
  font-size: 12.5px;
  background: var(--learn-code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  overflow-x: auto;
  white-space: pre;
}
.learn-verdict__next { margin-top: 12px; display: inline-block; }
.learn-verdict__done { margin: 10px 0 0; }

/* ---------- Paywall ---------- */
.learn-paywall {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px 24px;
  align-items: center;
  margin-bottom: 20px;
  padding: 18px 20px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent-soft);
}
@media (max-width: 760px) { .learn-paywall { grid-template-columns: minmax(0, 1fr); } }
.learn-paywall__text { margin: 6px 0 0; max-width: 70ch; }
.learn-paywall__actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.learn-lock { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-muted); }
.learn-outline__item.is-locked { cursor: default; }
.learn-outline__item.is-locked:hover { background: transparent; border-color: transparent; }
.learn-locked__card {
  max-width: 640px;
  margin: 24px auto;
  padding: 28px;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: grid;
  gap: 12px;
}
.learn-locked__card p { margin: 0; line-height: 1.6; }
.learn-locked__emblem { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; }

/* ---------- experience on the lesson page ---------- */
.learn-xpline { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin-top: 8px; }
.learn-xpchip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.learn-xpchip__glyph { font-size: 12px; }
.learn-unseal { font-size: 13px; }
.learn-unseal.is-armed { color: var(--learn-danger); }
.learn-xpline__hall { margin-left: auto; font-size: 13px; color: var(--accent); }
.learn-xpgain {
  display: grid;
  gap: 6px;
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--gold);
  border-radius: var(--radius);
  background: var(--gold-soft);
  animation: learn-xp-rise 0.5s ease-out;
}
.learn-xpgain__amount { font-family: var(--font-serif); font-size: 20px; color: var(--accent); font-variant-numeric: tabular-nums; }
.learn-xpgain__level { font-weight: 600; color: var(--text); }
.learn-xpgain.is-levelup { box-shadow: 0 0 0 1px var(--gold), 0 0 24px rgba(227, 180, 102, 0.35); }
.learn-xpgain__bar { display: block; height: 6px; border-radius: 999px; background: var(--accent-soft); overflow: hidden; }
.learn-xpgain__bar > span { display: block; height: 100%; background: linear-gradient(90deg, var(--gold), var(--accent-hover)); }
.learn-xpgain__note { font-size: 13px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
@keyframes learn-xp-rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .learn-xpgain { animation: none; } }
.learn-intro__hall { margin: 8px 0 0; font-size: 14px; color: var(--text-muted); }
.learn-intro__hall a { color: var(--accent); }
.learn-sealing { margin: 10px 0 0; font-size: 13px; color: var(--text-muted); }
.learn-sealing.is-refused { color: var(--learn-danger); font-weight: 600; }

/* ---------- C++: the input box for Run ---------- */
.learn-stdin { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.learn-stdin__label { cursor: pointer; padding: 8px 12px; font-size: 13px; color: var(--text); }
.learn-stdin__box {
  display: block;
  width: calc(100% - 24px);
  margin: 0 12px 12px;
  padding: 8px 10px;
  font-family: var(--learn-mono);
  font-size: 13px;
  color: var(--text);
  background: var(--learn-code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  resize: vertical;
}

/* ---- quiz lessons (Latin of the Grimoires, Logic & Puzzles) ---- */
.learn-quiz__form { display: grid; gap: 14px; }
/* Code inside a question (Rust and Go Basics): a block under the prompt, and
   outputs offered as choices. */
.learn-q__block { display: block; margin: 10px 0 2px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--learn-code-bg); font-family: var(--learn-mono); font-size: 13px; line-height: 1.55; white-space: pre;
  overflow-x: auto; tab-size: 4; font-weight: 400; max-width: 100%; }
.learn-q__out { white-space: pre; font-family: var(--learn-mono); }
.learn-teaching pre { tab-size: 4; }
.learn-q { margin: 0; padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); display: block; min-width: 0; }
.learn-q > * + * { margin-top: 10px; }
.learn-q > .learn-q__prompt + * { clear: both; }
.learn-q.is-right { border-color: var(--success, #3c8a5a); }
.learn-q.is-wrong { border-color: #c0505a; }
.learn-q__prompt { float: left; width: 100%; display: block; padding: 0; margin-bottom: 10px; font-size: 15px; line-height: 1.6; color: var(--text); }
.learn-q__prompt em, .learn-q__prompt i { font-family: var(--font-serif); }
.learn-q__num { width: 24px; height: 24px; margin-right: 8px; vertical-align: 1px; border-radius: 50%; display: inline-grid; place-items: center; font-size: 12px; font-weight: 700; background: var(--accent-soft, rgba(214, 170, 70, .18)); color: var(--accent); }
.learn-q__options { display: grid; gap: 6px; }
.learn-q__option { display: flex; gap: 10px; align-items: flex-start; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; }
.learn-q__option:hover { border-color: var(--accent); }
.learn-q__option input { margin-top: 3px; accent-color: var(--accent); }
.learn-q__option:has(input:checked) { border-color: var(--accent); background: var(--accent-soft, rgba(214, 170, 70, .12)); }
.learn-q__text { width: 100%; padding: 9px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font: 16px var(--font-serif); }
.learn-q__mark { margin: 0; font-size: 13px; font-weight: 700; }
.learn-q.is-right .learn-q__mark { color: var(--success, #5fb27e); }
.learn-q.is-wrong .learn-q__mark { color: #e0707a; }
.learn-q__mark[hidden], .learn-q__explain[hidden] { display: none; }
.learn-q__explain { margin: 0; font-size: 14px; color: var(--text-muted); font-style: italic; }

/* ---- the Learn page: the other workings, then one course at a time ---- */
.learn-visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.learn-more { margin: 0 0 22px; }
.learn-more__title { font: 700 13px var(--font-sans, inherit); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin: 0 0 10px; }
.learn-more__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.learn-more__card { display: grid; gap: 4px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--text); text-decoration: none; }
.learn-more__card strong { font: 600 18px var(--font-serif); color: var(--accent); }
.learn-more__card span { font-size: 13px; line-height: 1.45; color: var(--text-muted); }
.learn-more__card:hover, .learn-more__card:focus-visible { border-color: var(--accent); }
.learn-more__tag { display: none; font-style: normal; font-size: 12px; color: var(--text-muted); }
/* On narrow screens the three cards stay side by side, with a short tag
   in place of the description, so they take one row instead of three. */
@media (max-width: 760px) {
  .learn-more__grid { gap: 8px; }
  .learn-more__card { padding: 10px; align-content: start; }
  .learn-more__card strong { font-size: 16px; }
  .learn-more__card span { display: none; }
  .learn-more__tag { display: block; }
}

.learn-library { display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 900px) { .learn-library { grid-template-columns: minmax(0, 1fr); gap: 16px; } }
.learn-chooser {
  display: grid; gap: 16px;
  padding: 14px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface);
}
.learn-chooser__heading { display: flex; align-items: baseline; gap: 8px; margin: 0 0 8px; font: 700 13px var(--font-sans, inherit); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.learn-chooser__tally { font-size: 12px; font-weight: 600; letter-spacing: 0; color: var(--text-muted); padding: 0 7px; border: 1px solid var(--border); border-radius: 999px; }
.learn-chooser__lede { margin: -2px 0 8px; font-size: 13px; line-height: 1.45; color: var(--text-muted); }
.learn-chooser__list { display: grid; gap: 4px; }
@media (max-width: 900px) { .learn-chooser__list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.learn-chooser__item {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 10px; align-items: center;
  padding: 6px 10px; border: 1px solid transparent; border-radius: 8px;
  color: var(--text); text-decoration: none;
}
.learn-chooser__item:hover { background: var(--surface-muted); text-decoration: none; }
.learn-chooser__item:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.learn-chooser__item.is-active { background: var(--accent-soft); border-color: var(--accent); }
.learn-chooser__name { grid-column: 1; font: 17px/1.25 var(--font-serif); }
.learn-chooser__meta { grid-column: 1; font-size: 12px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.learn-chooser__progress { grid-column: 2; grid-row: 1 / span 2; display: grid; justify-items: end; gap: 4px; font-size: 12px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.learn-chooser__bar { display: block; width: 48px; height: 4px; border-radius: 999px; background: var(--surface-muted); overflow: hidden; }
.learn-chooser__bar > span { display: block; height: 100%; background: var(--accent); }
.learn-chooser__progress.is-complete { color: var(--success); }
.learn-chooser__progress.is-complete .learn-chooser__bar > span { background: var(--success); }
/* Phones: two narrow columns, the progress tucked under the name. */
@media (max-width: 520px) {
  .learn-chooser { padding: 10px; }
  .learn-chooser__item { grid-template-columns: minmax(0, 1fr); padding: 6px 8px; }
  .learn-chooser__name { font-size: 15px; }
  .learn-chooser__progress { grid-column: 1; grid-row: auto; display: flex; align-items: center; gap: 6px; justify-items: start; }
}

.learn-shelf { display: grid; gap: 20px; min-width: 0; }
.learn-shelf > .learn-course { scroll-margin-top: 16px; }
.learn-library.is-tabbed .learn-shelf > .learn-course[hidden] { display: none; }
.learn-shelf > .learn-course:focus { outline: none; }

/* ---- the Arena ---- */
.arena-intro { margin-bottom: 18px; }
.arena-intro .page-subtitle { margin-bottom: 6px; }
.arena-intro__sub { font-size: 0.62em; color: var(--accent); white-space: nowrap; }
.arena-paywall { margin-bottom: 18px; }
.arena-new { font: 700 10px var(--font-sans, inherit); font-style: normal; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 0 6px; vertical-align: 2px; }
.arena-live { display: flex; align-items: center; gap: 5px; color: var(--success); }
.arena-live__dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 3px rgba(90, 168, 108, .18); }
.arena-game__live { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--success); }
.arena-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 18px; margin: 16px 0 0; padding: 14px 0 0; border-top: 1px solid var(--border); }
.arena-facts div { display: grid; gap: 2px; min-width: 0; }
.arena-facts dt { font: 700 11px var(--font-sans, inherit); letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); }
.arena-facts dd { margin: 0; font-size: 15px; overflow-wrap: anywhere; }
.arena-game__note { margin: 12px 0 0; font-size: 13px; color: var(--text-muted); }
.arena-library .learn-arena__tier { margin-top: 0; }
/* Wide screens: the menu in two columns, so all of it sits beside the chosen game. */
@media (min-width: 901px) {
  .arena-library { grid-template-columns: minmax(380px, 440px) minmax(0, 1fr); }
  .arena-library .learn-chooser { gap: 12px; position: sticky; top: 12px; }
  .arena-library .learn-chooser__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .arena-library .learn-chooser__name { font-size: 16px; }
}
.arena-tier__head { margin-bottom: 14px; }
@media (max-width: 520px) { .arena-facts { grid-template-columns: minmax(0, 1fr); } }
.learn-arena__tier { margin-top: 28px; }
.learn-arena__tier-title { font: 700 22px var(--font-serif); margin: 0 0 10px; }
.learn-arena__tier-title span { font: 600 13px var(--font-sans, inherit); color: var(--text-muted); margin-left: 8px; }
.learn-arena__tier--novice .learn-arena__num { background: #8a5a2b; }
.learn-arena__tier--adept .learn-arena__num { background: #7d8088; }
.learn-arena__tier--master .learn-arena__num { background: #b8923f; }
.learn-arena__tier--ipsissimus .learn-arena__num { background: #4b2470; box-shadow: 0 0 0 2px #b8923f; }
.learn-arena__tier--ipsissimus .learn-arena__item.is-solved { border-color: #b8923f; }
.learn-arena__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.learn-arena__item { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; padding: 12px 16px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.learn-arena__item.is-solved { border-color: var(--accent); }
.learn-arena__num { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 700; }
.learn-arena__text { display: grid; gap: 2px; min-width: 0; }
.learn-arena__text strong { font: 600 17px var(--font-serif); }
.learn-arena__text span { font-size: 13px; color: var(--text-muted); }
.learn-arena__langs { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.learn-arena__lang { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--border); font-size: 13px; text-decoration: none; color: var(--text); }
.learn-arena__lang:hover { border-color: var(--accent); color: var(--accent); }
.learn-arena__lang.is-solved { border-color: var(--accent); color: var(--accent); }
.learn-arena__rule { font-size: 14px; color: var(--text-muted); border-left: 3px solid var(--accent); padding-left: 10px; }
/* Wide screens: the challenges of a tier in two columns, to save scrolling. */
@media (min-width: 1100px) {
  .arena-library .learn-arena__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .arena-library .learn-arena__item { grid-template-columns: auto minmax(0, 1fr); gap: 6px 12px; padding: 10px 14px; }
  .arena-library .learn-arena__langs { grid-column: 2; justify-content: flex-start; }
  .arena-library .learn-arena__lang { padding: 3px 10px; font-size: 12px; }
}
@media (max-width: 600px) {
  .learn-arena__item { grid-template-columns: auto 1fr; }
  .learn-arena__langs { grid-column: 1 / -1; justify-content: flex-start; }
}

/* ---- the Workbench ---- */
.learn-workbench__head { margin-bottom: 14px; }
.learn-workbench__lede { color: var(--text-muted); margin: 4px 0 12px; max-width: 760px; }
.learn-workbench__langs { display: flex; flex-wrap: wrap; gap: 6px; }
.learn-workbench__lang { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--border); font-size: 14px; text-decoration: none; color: var(--text-muted); }
.learn-workbench__lang.is-active { border-color: var(--accent); color: var(--text); background: var(--accent-soft, rgba(214, 170, 70, .15)); font-weight: 600; }
.learn-workbench__grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
.learn-workbench__grid:has(.learn-workbench__schema) { grid-template-columns: minmax(0, 1fr) 300px; }
.learn-workbench__schema ul { padding-left: 18px; display: grid; gap: 4px; font-size: 13px; }
@media (max-width: 860px) { .learn-workbench__grid:has(.learn-workbench__schema) { grid-template-columns: 1fr; } }

/* ---- the Scriptorium ---- */
.scr-controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px; }
.scr-modes { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.scr-mode { background: none; border: 0; padding: 8px 16px; color: var(--text-muted); cursor: pointer; font: inherit; }
.scr-mode.is-active { background: var(--accent-soft, rgba(214, 170, 70, .18)); color: var(--text); font-weight: 600; }
.scr-pick select { padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font: inherit; max-width: 100%; }
.scr-desk { display: grid; gap: 10px; padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.scr-page { font: 22px/1.7 var(--font-serif); color: var(--text-muted); white-space: pre-wrap; overflow-wrap: anywhere; cursor: text; }
.scr-page.is-code { font: 17px/1.6 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; }
.scr-ch.is-right { color: var(--text); }
.scr-ch.is-wrong { color: #fff; background: #b8404c; border-radius: 2px; }
.scr-ch.is-cursor { box-shadow: inset 2px 0 0 var(--accent); }
.scr-ch--nl { color: var(--border); }
.scr-source { margin: 0; font-size: 13px; color: var(--text-muted); font-style: italic; }
.scr-input { width: 100%; padding: 12px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font: 18px/1.5 var(--font-serif); resize: vertical; }
.scr-stats { display: flex; flex-wrap: wrap; gap: 8px 24px; font-size: 14px; color: var(--text-muted); }
.scr-stats strong { font: 700 22px var(--font-serif); color: var(--text); font-variant-numeric: tabular-nums; }
.scr-result { padding: 10px 14px; border-radius: 8px; border: 1px solid var(--border); }
.scr-result.is-clean { border-color: var(--accent); color: var(--text); }
.scr-result[hidden] { display: none; }
.scr-records { margin-top: 28px; }
.scr-bests { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; }
.scr-bests > div { display: grid; gap: 2px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.scr-bests span { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); }
.scr-bests strong { font: 700 24px var(--font-serif); }
.scr-bests small { font-size: 12px; color: var(--text-muted); }
.scr-recent { margin: 12px 0 0; padding-left: 18px; font-size: 14px; color: var(--text-muted); }
.scr-input.is-code { font: 16px/1.5 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; tab-size: 4; }

.flag-promos { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; margin: 18px 0 6px; }
.flag-promo { display: grid; gap: 4px; align-content: start; padding: 16px 20px; border-radius: 12px; border: 1px solid var(--accent); background: linear-gradient(120deg, rgba(232, 184, 74, .12), rgba(143, 182, 238, .1)); color: var(--text); text-decoration: none; }
.flag-promo strong { font: 700 24px var(--font-serif); }
.flag-promo span:last-child { color: var(--text-muted); font-size: 14px; }
.flag-promo:hover { border-color: var(--text); }
.flag-promo--live { background: linear-gradient(120deg, rgba(224, 112, 122, .14), rgba(216, 168, 255, .12)); border-color: #c98bd8; }
.flag-promo--race { background: linear-gradient(120deg, rgba(240, 120, 60, .16), rgba(232, 184, 74, .12)); border-color: #e8894a; }
.flag-promo--swarm { background: linear-gradient(120deg, rgba(201, 168, 255, .14), rgba(232, 184, 74, .1)); border-color: #b69ae8; }
.flag-promo--survival { background: linear-gradient(120deg, rgba(110, 200, 190, .14), rgba(143, 182, 238, .12)); border-color: #6fc4c0; }

/* ---- tables and foreign scripts in lesson text (Greek and Hebrew of the Grimoires) ---- */
.learn-table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; margin: 10px 0 16px; font-size: 15px; }
.learn-table td { padding: 5px 14px 5px 0; border-bottom: 1px solid var(--border); vertical-align: top; }
.learn-grc { font-family: "Gentium Plus", "GFS Didot", "Noto Serif", "Palatino Linotype", "Times New Roman", serif; font-size: 1.06em; }
.learn-he { font-family: "SBL Hebrew", "Ezra SIL", "Noto Serif Hebrew", "Taamey Frank CLM", "Times New Roman", serif; font-size: 1.28em; line-height: 1.35; unicode-bidi: isolate; }