/* Gen2Courses. The colours are the videos' own: slate background, and one colour per kind of
   data (cyan strings, yellow focus, green answers, orange maps, purple sets). */
:root {
  --bg: #0f172a;
  --bg-2: #0b1222;
  --panel: #1e293b;
  --panel-2: #162033;
  --line: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #86a8e7;
  --cyan: #67e8f9;
  --yellow: #fbbf24;
  --yellow-soft: rgba(251, 191, 36, 0.18);
  --on-yellow: #111827;
  --green: #4ade80;
  --orange: #fb923c;
  --purple: #c792ea;
  --red: #f87171;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --mono: "JetBrains Mono", "Cascadia Code", ui-monospace, SFMono-Regular, Consolas, monospace;
  --sans: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 16px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --bg-2: #eef2f7;
    --panel: #ffffff;
    --panel-2: #f1f5f9;
    --line: #dbe3ee;
    --text: #0f172a;
    --muted: #526177;
    --accent: #3b5fb0;
    --cyan: #0e7490;
    --yellow: #b45309;
    --yellow-soft: rgba(217, 119, 6, 0.14);
    --on-yellow: #ffffff;
    --green: #15803d;
    --orange: #c2410c;
    --purple: #7e3fb0;
    --red: #b91c1c;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
code { font-family: var(--mono); font-size: 0.9em; color: var(--cyan); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(34px, 5vw, 56px); font-weight: 800; }
h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; }
h3 { font-size: 20px; font-weight: 750; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.lead { font-size: 19px; color: var(--muted); max-width: 62ch; }
.eyebrow {
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.skip { position: absolute; left: -999px; top: 8px; background: var(--panel); padding: 8px 14px; z-index: 10; }
.skip:focus { left: 8px; }

/* Header and footer */
.top {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.top nav { display: flex; gap: 22px; }
.top nav a { color: var(--muted); font-weight: 600; font-size: 15px; }
.top nav a[aria-current="page"], .top nav a:hover { color: var(--text); text-decoration: none; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; font-size: 20px; letter-spacing: -0.01em; }
.logo:hover { text-decoration: none; }
.logo .two { height: 0.74em; width: 0.64em; vertical-align: baseline; overflow: visible; }
.logo .two path { fill: none; stroke: var(--yellow); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.mark { width: 35px; height: 32px; flex: none; }
@media (max-width: 520px) {
  .top nav { gap: 14px; }
  .top nav a { font-size: 14px; }
  .logo { font-size: 17px; }
  .nav-yt { display: none; }
}
.foot { border-top: 1px solid var(--line); margin-top: 80px; padding: 40px 0 30px; background: var(--bg-2); }
.foot-row { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; margin-bottom: 20px; }
.foot nav { display: flex; gap: 22px; flex-wrap: wrap; align-items: flex-start; }
.foot nav a { color: var(--muted); }

/* Buttons and badges */
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  font-weight: 700;
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.primary { background: var(--yellow); border-color: var(--yellow); color: var(--on-yellow); }
.btn.primary:hover { filter: brightness(1.06); }
.badges { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.badge, .tag {
  font: 600 12px/1 var(--mono);
  padding: 6px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  white-space: nowrap;
}
.badge.soon, .tag.soon { color: var(--purple); border-color: color-mix(in srgb, var(--purple) 45%, transparent); }
.tag { padding: 3px 7px; font-size: 11px; vertical-align: 2px; }

/* Course colours */
.c-cyan { --c: var(--cyan); }
.c-yellow { --c: var(--yellow); }
.c-orange { --c: var(--orange); }
.c-purple { --c: var(--purple); }
.c-green { --c: var(--green); }

/* Hero */
.hero { padding: 72px 0 40px; background: radial-gradient(1200px 500px at 80% -10%, color-mix(in srgb, var(--cyan) 10%, transparent), transparent 60%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 920px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } .hero { padding-top: 48px; } }
.hero h1 { font-size: clamp(42px, 7vw, 76px); }
.hl { color: var(--cyan); }
.stats { list-style: none; padding: 0; margin: 32px 0 0; display: flex; gap: 28px; flex-wrap: wrap; color: var(--muted); }
.stats b { display: block; font: 800 28px/1.1 var(--mono); color: var(--text); }

/* The sliding-window demo: cells and a frame that slides over them, in the videos' style. */
.demo {
  --cell: 62px;
  --gap: 8px;
  --pitch: calc(var(--cell) + var(--gap));
  margin: 0;
  padding: 28px;
  border-radius: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}
@media (max-width: 520px) { .demo { --cell: 42px; --gap: 6px; padding: 20px 16px; } }
.demo-name, .var { font-family: var(--mono); font-size: 15px; }
.demo-name b, .var b { color: var(--text); }
.demo-name span, .var > span { color: var(--accent); }
.demo-row { position: relative; display: flex; gap: var(--gap); margin: 12px 0 22px; }
.demo-cell { width: var(--cell); text-align: center; flex: none; }
.demo-cell span {
  display: grid;
  place-items: center;
  height: calc(var(--cell) * 0.86);
  border: 3px solid var(--accent);
  border-radius: 10px;
  background: var(--panel-2);
  font: 800 calc(var(--cell) * 0.42) var(--mono);
}
.demo-cell small { font: 13px var(--mono); color: var(--muted); }
.demo-window {
  position: absolute;
  top: -6px;
  left: -6px;
  width: calc(var(--pitch) * 3 - var(--gap) + 12px);
  height: calc(var(--cell) * 0.86 + 12px);
  border: 4px solid var(--yellow);
  border-radius: 13px;
  background: var(--yellow-soft);
  animation: slide 8s ease-in-out infinite;
}
@keyframes slide {
  0%, 20% { transform: translateX(0); }
  25%, 45% { transform: translateX(var(--pitch)); }
  50%, 70% { transform: translateX(calc(var(--pitch) * 2)); }
  75%, 95% { transform: translateX(calc(var(--pitch) * 3)); }
  100% { transform: translateX(0); }
}
.demo-vars { display: flex; gap: 28px; }
.var-box {
  position: relative;
  width: 110px;
  height: 58px;
  margin-top: 6px;
  border: 3px solid var(--muted);
  border-radius: 10px;
  display: grid;
  place-items: center;
  font: 800 26px var(--mono);
  color: var(--text);
}
.var-box.good { border-color: var(--green); color: var(--green); background: color-mix(in srgb, var(--green) 12%, transparent); }
.sum { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0; animation: show 8s infinite; }
.sum.s0 { animation-delay: 0s; }
.sum.s1 { animation-delay: -6s; }
.sum.s2 { animation-delay: -4s; }
.sum.s3 { animation-delay: -2s; }
@keyframes show { 0%, 22% { opacity: 1; } 25%, 100% { opacity: 0; } }
.demo figcaption { margin-top: 18px; color: var(--muted); font-size: 15px; }
@media (prefers-reduced-motion: reduce) {
  .demo-window, .sum { animation: none; }
  .sum.s2 { opacity: 1; }
  .demo-window { transform: translateX(calc(var(--pitch) * 2)); }
}

/* Sections */
.section { padding-top: 64px; }
.section-lead { max-width: 62ch; margin-bottom: 28px; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 20px; }
.page-head { padding-top: 56px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 920px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }
.steps li { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.steps p { color: var(--muted); margin: 0; font-size: 16px; }
.step-n {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 3px solid var(--yellow);
  font: 800 17px var(--mono);
  color: var(--yellow);
  margin-bottom: 12px;
}

/* Cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 20px; }
.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.card:hover { text-decoration: none; transform: translateY(-3px); border-color: var(--c, var(--accent)); }
.course-card { overflow: hidden; display: flex; flex-direction: column; }
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.card-body .clamp { color: var(--muted); font-size: 15.5px; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.sub { color: var(--c, var(--accent)); font-weight: 650; margin-bottom: 10px; }
.sub.big { font-size: 20px; }
.meta { font: 14px var(--mono); color: var(--muted); margin-top: auto; margin-bottom: 0; }
.cover {
  display: grid;
  place-items: center;
  padding: 30px 16px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--c, var(--accent)) 16%, var(--panel-2)), var(--panel-2));
  border-bottom: 1px solid var(--line);
}
.cells { display: flex; gap: 6px; }
.cell {
  width: 46px;
  height: 52px;
  display: grid;
  place-items: center;
  border: 3px solid var(--c, var(--accent));
  border-radius: 10px;
  background: var(--bg);
  font: 800 22px var(--mono);
  color: var(--text);
}
.cell.lit { border-color: var(--yellow); background: var(--yellow-soft); }
.callout {
  display: flex;
  gap: 30px;
  align-items: center;
  justify-content: space-between;
  padding: 34px;
  border-radius: 22px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--green) 10%, var(--panel)), var(--panel));
  border: 1px solid var(--line);
}
.callout p { color: var(--muted); max-width: 70ch; margin: 0; }
@media (max-width: 760px) { .callout { flex-direction: column; align-items: flex-start; padding: 24px; } }

/* Course page */
.course-hero { padding: 40px 0 20px; background: linear-gradient(180deg, color-mix(in srgb, var(--c) 9%, transparent), transparent); border-bottom: 1px solid var(--line); }
.course-hero-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center; padding-bottom: 24px; }
.course-hero .cover { border-radius: 20px; border: 1px solid var(--line); padding: 48px 16px; }
.course-hero .cell { width: 54px; height: 62px; font-size: 26px; }
@media (max-width: 860px) { .course-hero-grid { grid-template-columns: 1fr; } .course-hero .cover { display: none; } }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.crumbs span { margin: 0 6px; opacity: 0.6; }
.note { background: var(--panel); border-left: 4px solid var(--purple); padding: 14px 18px; border-radius: 10px; color: var(--muted); }
.module { margin-top: 40px; }
.module-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 10px; margin-bottom: 6px; }
.module-head h2 { font-size: 22px; margin: 0; }
.eps { list-style: none; padding: 0; margin: 0; }
.ep > a, .ep.planned {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 10px;
  border-radius: 12px;
  color: var(--text);
}
.ep > a:hover { background: var(--panel); text-decoration: none; }
.ep + .ep { border-top: 1px solid color-mix(in srgb, var(--line) 55%, transparent); }
.ep-n { font: 700 15px var(--mono); color: var(--c, var(--accent)); }
.ep-title { font-weight: 650; }
.ep-sum { display: block; color: var(--muted); font-size: 15px; margin-top: 2px; }
.milestone { display: block; font-size: 14px; color: var(--green); }
.ep-side { display: flex; gap: 10px; align-items: center; }
.dur { font: 14px var(--mono); color: var(--muted); }
.play { color: var(--red); font-size: 13px; }
.ep.planned { align-items: start; }

/* Episode page */
.episode { padding-top: 32px; }
.ep-head h1 { font-size: clamp(30px, 4.4vw, 46px); }
.ep-num { display: block; font: 700 16px var(--mono); color: var(--c, var(--accent)); letter-spacing: 0.04em; margin-bottom: 8px; }
.player-wrap { margin: 24px 0 36px; }
.player {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  overflow: hidden;
  background: #0f172a;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 0;
  color: inherit;
  font: inherit;
}
.player img { width: 100%; height: 100%; object-fit: cover; }
.player iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
button.player { cursor: pointer; }
.play-btn {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 84px;
  height: 84px;
  margin: -42px 0 0 -42px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.78);
  border: 3px solid var(--yellow);
  transition: transform 0.15s ease;
}
.play-btn::after {
  content: "";
  position: absolute;
  left: 32px;
  top: 24px;
  border-left: 28px solid var(--yellow);
  border-top: 16px solid transparent;
  border-bottom: 16px solid transparent;
}
button.player:hover .play-btn { transform: scale(1.08); }
.player-note {
  position: absolute;
  right: 14px;
  top: 14px;
  background: rgba(15, 23, 42, 0.9);
  color: #e2e8f0;
  border: 1px solid #334155;
  padding: 7px 12px;
  border-radius: 999px;
  font: 600 13px var(--mono);
}
@media (max-width: 600px) { .player-note { top: 8px; right: 8px; padding: 4px 9px; font-size: 11px; } }
.player-blank { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; font-size: 28px; font-weight: 800; color: #e2e8f0; padding: 20px; }
.player-blank span { display: block; font: 600 15px var(--mono); color: #94a3b8; }
.ep-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 48px; }
@media (max-width: 900px) { .ep-grid { grid-template-columns: 1fr; gap: 10px; } }
.ep-grid .lead { color: var(--text); font-size: 18px; }
.block { margin-bottom: 32px; }
.block h2 { font-size: 20px; }
.learn { padding-left: 0; list-style: none; margin: 0; }
.learn li { position: relative; padding: 8px 0 8px 32px; border-bottom: 1px solid color-mix(in srgb, var(--line) 55%, transparent); }
.learn li::before { content: "✓"; position: absolute; left: 4px; top: 8px; color: var(--green); font-weight: 800; }
.chapters { list-style: none; padding: 0; margin: 0; max-height: 620px; overflow: auto; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.chapters li + li { border-top: 1px solid color-mix(in srgb, var(--line) 55%, transparent); }
.chap { display: flex; gap: 14px; width: 100%; padding: 9px 14px; background: none; border: 0; color: var(--text); font: 15px/1.4 var(--sans); text-align: left; }
button.chap { cursor: pointer; }
button.chap:hover { background: var(--panel-2); }
.chap .t { font: 13.5px/1.6 var(--mono); color: var(--accent); min-width: 54px; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 48px; }
@media (max-width: 600px) { .pager { grid-template-columns: 1fr; } }
.pager-link { padding: 18px 20px; font-weight: 700; }
.pager-link span { display: block; font-weight: 500; margin-bottom: 4px; }
.pager-link.next { text-align: right; }

/* About */
.prose { max-width: 800px; }
.prose h2 { margin-top: 1.6em; font-size: 26px; }
.prose p { color: var(--muted); }
.prose .lead { color: var(--text); }

/* Account link in the header */
.nav-account { display: inline-flex; align-items: center; gap: 8px; }
.nav-account.signed-in span { color: var(--text); }
@media (max-width: 520px) { .nav-account.signed-in span { display: none; } }
.avatar { border-radius: 50%; object-fit: cover; flex: none; }
.avatar-letter {
  display: inline-grid;
  place-items: center;
  background: var(--panel-2);
  border: 2px solid var(--yellow);
  color: var(--yellow);
  font: 800 14px var(--mono);
}

/* Small pill buttons (watched toggle, sign in to track) */
.ep-actions { margin-top: 14px; }
.chip-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  font: 600 14px var(--sans);
  cursor: pointer;
}
.chip-btn:hover { border-color: var(--accent); text-decoration: none; }
.chip-btn.on { border-color: var(--green); color: var(--green); background: color-mix(in srgb, var(--green) 12%, var(--panel)); }

/* Progress bars */
.bar { display: block; height: 8px; border-radius: 99px; background: var(--panel-2); border: 1px solid var(--line); overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--green); border-radius: 99px; transition: width 0.4s ease; }
.course-progress { max-width: 420px; margin: 4px 0 6px; }
.course-progress p { margin: 6px 0 0; }
.ep.done .ep-n { color: var(--green); }
.ep.done .ep-n::after { content: " ✓"; }
.ep.done .ep-title { color: var(--muted); }
.quiz-tag.perfect { color: var(--green); border-color: color-mix(in srgb, var(--green) 50%, transparent); }

/* Continue where you left off */
[data-continue] { margin-top: 8px; }
.continue { display: grid; gap: 6px; padding: 20px 24px; border-left: 5px solid var(--c, var(--accent)); max-width: 640px; }
.continue .eyebrow { margin: 0; }
.continue-title { font-size: 20px; font-weight: 750; }

/* Quiz */
.quiz-block { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--line); }
.quiz-head p { max-width: 70ch; }
.quiz-best { font: 600 14px var(--mono); color: var(--green); }
.quiz-round { margin: 30px 0 12px; font-size: 20px; color: var(--c, var(--accent)); }
.q { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 14px; }
.q-prompt { font-weight: 650; display: flex; gap: 12px; align-items: baseline; margin-bottom: 10px; }
.q-n {
  flex: none;
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 2px solid var(--yellow);
  color: var(--yellow);
  font: 800 14px var(--mono);
}
.q-code {
  margin: 0 0 14px;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--bg);
  border: 1px solid var(--line);
  overflow-x: auto;
  font: 15px/1.55 var(--mono);
}
.q-code code { color: var(--text); font-size: inherit; }
.q-options { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr)); gap: 10px; }
.q-opt {
  padding: 10px 14px;
  border-radius: 10px;
  border: 2px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  font: 600 15px var(--mono);
  text-align: left;
  cursor: pointer;
}
.q-opt { overflow-wrap: anywhere; }
.player-caption { margin: 10px 2px 0; font: 600 14px var(--mono); color: var(--muted); }
.progress-top b { display: block; }
.progress-top span { white-space: nowrap; }
.q-opt:hover:not(:disabled) { border-color: var(--accent); }
.q-opt:disabled { cursor: default; opacity: 0.7; }
.q-opt.right { border-color: var(--green); color: var(--green); opacity: 1; background: color-mix(in srgb, var(--green) 12%, var(--panel-2)); }
.q-opt.wrong { border-color: var(--red); color: var(--red); opacity: 1; background: color-mix(in srgb, var(--red) 10%, var(--panel-2)); }
.q-why { margin: 12px 0 0; color: var(--muted); }
.q-why b { color: var(--text); }
.quiz-score { font: 600 14px var(--mono); color: var(--muted); }
.quiz-result { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; text-align: center; }
.quiz-big { font: 800 44px/1 var(--mono); color: var(--yellow); margin-bottom: 12px; }

/* Sign in */
.signin { display: grid; place-items: center; }
.signin-card {
  width: 100%;
  max-width: 460px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 34px 30px;
  text-align: center;
  box-shadow: var(--shadow);
}
.signin-card .mark { width: 54px; height: 44px; margin-bottom: 12px; }
.signin-card h1 { font-size: 34px; }
.signin-buttons { display: grid; gap: 12px; margin: 24px 0; }
.signin-btn { justify-content: center; padding: 13px 18px; }
.signin-btn[hidden] { display: none; }
.signin-error { color: var(--red); background: color-mix(in srgb, var(--red) 10%, transparent); border-radius: 10px; padding: 10px 14px; }

/* My learning */
.who { display: flex; gap: 18px; align-items: center; }
.who h1 { font-size: clamp(28px, 4vw, 40px); margin: 0; }
.who p { margin: 0; }
.account-h { font-size: 22px; margin-top: 40px; }
.progress-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: 16px; }
.progress-card { display: grid; gap: 10px; padding: 18px 20px; }
.progress-card:hover { transform: none; }
.progress-top { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.progress-top a { color: var(--text); }
.scores { list-style: none; padding: 0; margin: 0; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.scores li { display: grid; grid-template-columns: 1fr auto auto; gap: 16px; align-items: center; padding: 10px 16px; }
.scores li + li { border-top: 1px solid color-mix(in srgb, var(--line) 55%, transparent); }
.score { font: 700 15px var(--mono); }
.score.perfect { color: var(--green); }
.account-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.btn.danger { color: var(--red); border-color: color-mix(in srgb, var(--red) 45%, transparent); }
[hidden] { display: none !important; }

/* Language editions: the picker on a course page, the pills on an episode page. */
.lang-pick { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 14px 0 4px; }
.lang-pick .small { margin-right: 4px; }
.lang {
  font: 600 13px/1 var(--mono);
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  text-decoration: none;
}
.lang:hover { color: var(--text); border-color: var(--accent); text-decoration: none; }
.lang[aria-current="page"], .lang[aria-pressed="true"] {
  color: var(--on-yellow);
  background: var(--c, var(--yellow));
  border-color: var(--c, var(--yellow));
}