@font-face { font-family: "Newsreader"; src: url("/fonts/newsreader-latin-opsz-normal.woff2") format("woff2-variations"); font-weight: 200 800; font-style: normal; font-display: swap; }
@font-face { font-family: "Newsreader"; src: url("/fonts/newsreader-latin-opsz-italic.woff2") format("woff2-variations"); font-weight: 200 800; font-style: italic; font-display: swap; }
@font-face { font-family: "Inter Tight"; src: url("/fonts/inter-tight-latin-wght-normal.woff2") format("woff2-variations"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("/fonts/jetbrains-mono-latin-wght-normal.woff2") format("woff2-variations"); font-weight: 100 800; font-display: swap; }

:root {
  --paper: #f5f1e8;
  --paper-2: #ece6d8;
  --card: #fffdf8;
  --ink: #1c1a15;
  --ink-2: #4a463d;
  --muted: #7a7466;
  --rule: #ddd5c3;
  --accent: #23793a;
  --accent-ink: #ffffff;
  --accent-soft: #e2efdf;
  --wrong: #b23b26;
  --wrong-soft: #f6e1da;
  --code-bg: #fffdf8;
  --code-bar: #f0ebdf;
  --code-gutter: #b3ab98;
  --focus: #2f6fd6;
  --shadow: 0 1px 0 rgba(28, 26, 21, 0.04), 0 8px 24px -12px rgba(28, 26, 21, 0.18);
  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --sans: "Inter Tight", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --col: 46rem;
  --wide: 56rem;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #16150f;
    --paper-2: #1f1d16;
    --card: #1c1b15;
    --ink: #ece6d6;
    --ink-2: #c8c1ae;
    --muted: #8f887a;
    --rule: #34312a;
    --accent: #5cc073;
    --accent-ink: #0e1a10;
    --accent-soft: #1b2e1e;
    --wrong: #e8735c;
    --wrong-soft: #36201a;
    --code-bg: #1f2228;
    --code-bar: #262a31;
    --code-gutter: #5a606b;
    --focus: #7aa7ff;
    --shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 10px 30px -14px rgba(0, 0, 0, 0.6);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.55 var(--sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 0.18em; }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
[tabindex="-1"]:focus { outline: none; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 1rem; top: -3rem; background: var(--ink); color: var(--paper); padding: 0.5rem 0.9rem; border-radius: 6px; z-index: 10; }
.skip:focus { top: 0.75rem; }

/* ---------- top bar ---------- */
.bar {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--rule);
}
.bar__inner { max-width: var(--wide); margin: 0 auto; padding: 0.7rem 1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; min-width: 0; }
.brand__mark { width: 1.9rem; height: 1.9rem; color: var(--accent); flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-weight: 650; letter-spacing: -0.01em; }
.brand__sub { font-size: 0.78rem; color: var(--muted); }
.bar__right { display: flex; align-items: center; gap: 1.1rem; }

.progress { list-style: none; display: flex; gap: 0.35rem; margin: 0; padding: 0; }
body[data-screen="intro"] .progress { display: none; }
.pip { display: block; width: 1.6rem; height: 0.4rem; border-radius: 99px; background: var(--rule); position: relative; }
.pip::after { content: ""; position: absolute; inset: -0.6rem -0.1rem; } /* larger tap target */
.pip--right { background: var(--accent); }
.pip--wrong { background: var(--wrong); }
.pip.is-current { background: var(--ink); }
.pip.is-current.pip--right { box-shadow: 0 0 0 2px var(--paper), 0 0 0 3.5px var(--accent); }
.pip.is-current.pip--wrong { box-shadow: 0 0 0 2px var(--paper), 0 0 0 3.5px var(--wrong); }
.pip[aria-disabled="true"] { opacity: 0.7; }

.lang { display: inline-flex; padding: 3px; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 9px; }
.lang button {
  font: 550 0.82rem/1 var(--sans); color: var(--muted); background: none; border: 0;
  padding: 0.45rem 0.7rem; border-radius: 6px; cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--card); color: var(--ink); box-shadow: 0 1px 2px rgba(0,0,0,0.12); }
body[data-screen="intro"] .lang { display: none; }

/* ---------- layout ---------- */
main { flex: 1; width: 100%; max-width: var(--col); margin: 0 auto; padding: 2.5rem 1rem 4rem; }
.eyebrow { font: 600 0.78rem/1.2 var(--sans); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin: 0 0 0.9rem; }
.display { font: 500 clamp(2.1rem, 6vw, 3.4rem)/1.05 var(--serif); letter-spacing: -0.02em; margin: 0 0 1.2rem; text-wrap: balance; font-variation-settings: "opsz" 72; }
.lede { font: 400 1.22rem/1.55 var(--serif); color: var(--ink-2); margin: 0 0 2rem; text-wrap: pretty; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font: 600 0.98rem/1 var(--sans); text-decoration: none;
  padding: 0.85rem 1.25rem; border-radius: 10px; border: 1px solid transparent; cursor: pointer;
  transition: transform 0.12s ease, background-color 0.15s ease, opacity 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: color-mix(in srgb, var(--ink) 86%, var(--accent)); }
.btn--primary:disabled { opacity: 0.35; cursor: not-allowed; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn--ghost:hover { background: var(--paper-2); }

/* ---------- intro ---------- */
.pick { margin: 0 0 1.75rem; }
.pick__label { font-size: 0.95rem; color: var(--ink-2); margin: 0 0 0.75rem; }
.pick__options { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.langcard {
  text-align: left; cursor: pointer; font: inherit; color: inherit;
  background: var(--card); border: 1.5px solid var(--rule); border-radius: 12px;
  padding: 1rem 1.1rem; display: flex; flex-direction: column; gap: 0.45rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.langcard:hover { border-color: color-mix(in srgb, var(--ink) 30%, var(--rule)); }
.langcard[aria-checked="true"] { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.langcard__name { font-weight: 650; font-size: 1.05rem; display: flex; align-items: center; gap: 0.5rem; }
.langcard[aria-checked="true"] .langcard__name::after { content: "✓"; color: var(--accent); font-size: 0.9rem; }
.langcard__sample { font: 0.8rem/1.3 var(--mono); color: var(--muted); }
.intro__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 0 0 3rem; }

.faq { border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { font: 500 1.15rem/1.35 var(--serif); padding: 1rem 2rem 1rem 0; }
.faq details p { font: 1.04rem/1.65 var(--serif); color: var(--ink-2); margin: 0 0 1rem; }

summary { cursor: pointer; list-style: none; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after {
  content: ""; position: absolute; right: 0.2rem; top: 50%; width: 0.55rem; height: 0.55rem;
  border-right: 1.5px solid var(--muted); border-bottom: 1.5px solid var(--muted);
  transform: translateY(-70%) rotate(45deg); transition: transform 0.2s ease;
}
details[open] > summary::after { transform: translateY(-30%) rotate(-135deg); }

/* ---------- question ---------- */
.q__head { margin-bottom: 1.5rem; }
.prose { font: 400 1.12rem/1.65 var(--serif); color: var(--ink); text-wrap: pretty; }
.prose p { margin: 0 0 1rem; }
.prose p:last-child { margin-bottom: 0; }
.prose--prompt { font-size: 1.32rem; line-height: 1.5; font-variation-settings: "opsz" 24; }
.prose--prompt p:first-child { font-weight: 500; }
.prose :not(pre) > code, .choice__text code, .recap code {
  font-variant-ligatures: none;
  font: 0.86em/1 var(--mono); background: var(--paper-2); border: 1px solid var(--rule);
  border-radius: 5px; padding: 0.1em 0.35em; white-space: break-spaces;
}
.prose a { color: var(--accent); }

.code {
  margin: 0 -0.25rem 2rem; background: var(--code-bg); border: 1px solid var(--rule);
  border-radius: 12px; box-shadow: var(--shadow); overflow: hidden;
}
.code__bar {
  display: flex; align-items: center; gap: 0.75rem; padding: 0.55rem 0.8rem;
  background: var(--code-bar); border-bottom: 1px solid var(--rule);
  font: 500 0.8rem/1 var(--mono); color: var(--muted);
}
.code__dots { display: inline-flex; gap: 0.35rem; }
.code__dots i { width: 0.6rem; height: 0.6rem; border-radius: 50%; background: var(--rule); }
.code__file { flex: 1; }
.code__copy { font: 500 0.78rem/1 var(--sans); color: var(--muted); background: none; border: 1px solid var(--rule); border-radius: 6px; padding: 0.35rem 0.55rem; cursor: pointer; }
.code__copy:hover { color: var(--ink); background: var(--card); }

.shiki {
  margin: 0; padding: 1rem 1rem 1.1rem 0; overflow-x: auto;
  font: 400 0.9rem/1.65 var(--mono); font-variant-ligatures: none; tab-size: 2;
  background: transparent !important; counter-reset: line;
}
.shiki code { display: block; min-width: max-content; }
.shiki .line { display: inline-block; min-height: 1lh; padding-right: 1rem; }
.shiki .line::before {
  counter-increment: line; content: counter(line);
  display: inline-block; width: 3rem; padding-right: 1.1rem; text-align: right;
  color: var(--code-gutter); user-select: none; -webkit-user-select: none;
}
.shiki span { color: var(--shiki-light); }
@media (prefers-color-scheme: dark) { .shiki span { color: var(--shiki-dark); } }

/* code blocks inside the discussion: no window chrome */
.code--inline { margin: 1.25rem 0; box-shadow: none; }
.code--inline .shiki { font-size: 0.84rem; }

/* ---------- choices ---------- */
.choices fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
.choices legend { padding: 0; margin: 0 0 1rem; }
.prose--ask { font-size: 1.08rem; color: var(--ink-2); }
.prose--ask strong { color: var(--ink); font-weight: 600; }

.choice {
  position: relative; display: flex; align-items: flex-start; gap: 0.9rem;
  background: var(--card); border: 1.5px solid var(--rule); border-radius: 12px;
  padding: 0.95rem 1rem; margin-bottom: 0.6rem; cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}
.choice input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.choice:hover { border-color: color-mix(in srgb, var(--ink) 28%, var(--rule)); }
.choice:has(input:focus-visible) { outline: 2px solid var(--focus); outline-offset: 2px; }
.choice__key {
  flex: none; display: grid; place-items: center; width: 1.85rem; height: 1.85rem; margin-top: -0.05rem;
  border-radius: 8px; border: 1.5px solid var(--rule); font: 650 0.85rem/1 var(--sans); color: var(--muted);
  transition: all 0.15s ease;
}
.choice__text { flex: 1; font-size: 1.02rem; line-height: 1.5; padding-top: 0.12rem; }
.choice.is-selected { border-color: var(--ink); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ink) 10%, transparent); }
.choice.is-selected .choice__key { background: var(--ink); border-color: var(--ink); color: var(--paper); }

fieldset:disabled .choice { cursor: default; }
fieldset:disabled .choice:not(.is-correct):not(.is-wrong) { opacity: 0.6; }
fieldset:disabled .choice.is-selected:not(.is-correct):not(.is-wrong) { box-shadow: none; }
.choice.is-correct { border-color: var(--accent); background: var(--accent-soft); box-shadow: none; }
.choice.is-correct .choice__key { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.choice.is-wrong { border-color: var(--wrong); background: var(--wrong-soft); box-shadow: none; }
.choice.is-wrong .choice__key { background: var(--wrong); border-color: var(--wrong); color: var(--paper); }
.choice__tag { flex: none; align-self: center; font: 600 0.72rem/1 var(--sans); letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.is-correct .choice__tag { color: var(--accent); }
.is-wrong .choice__tag { color: var(--wrong); }

.choices__actions { display: flex; align-items: center; flex-wrap: wrap; gap: 1rem; margin-top: 1.25rem; }
.hint { font-size: 0.82rem; color: var(--muted); }
kbd { font: 600 0.75rem/1 var(--mono); border: 1px solid var(--rule); border-bottom-width: 2px; border-radius: 4px; padding: 0.12rem 0.32rem; background: var(--card); }
@media (hover: none) { .hint { display: none; } }

/* ---------- reveal ---------- */
.reveal { margin-top: 2rem; }
.reveal--new { animation: rise 0.35s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
@media (prefers-reduced-motion: reduce) { .reveal--new { animation: none; } }
.discussion details > summary + * { margin-top: 0.25rem; }
.verdict { display: flex; gap: 0.9rem; align-items: flex-start; padding: 1.1rem 1.2rem; border-radius: 12px; margin-bottom: 2.25rem; }
.verdict--right { background: var(--accent-soft); }
.verdict--wrong { background: var(--wrong-soft); }
.verdict__icon { flex: none; display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; font-weight: 700; color: var(--paper); }
.verdict--right .verdict__icon { background: var(--accent); color: var(--accent-ink); }
.verdict--wrong .verdict__icon { background: var(--wrong); }
.verdict__title { font: 600 1.08rem/1.3 var(--sans); margin: 0.2rem 0 0.25rem; }
.verdict__sub { margin: 0; color: var(--ink-2); font-size: 0.95rem; }

.discussion__title { font: 600 0.78rem/1 var(--sans); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 0 0 1.1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--rule); }
.discussion { font-size: 1.13rem; line-height: 1.72; }
.discussion p { margin: 0 0 1.15rem; }
.discussion em { font-style: italic; }
.discussion details { margin: 1.5rem 0; border: 1px solid var(--rule); border-radius: 12px; background: var(--card); }
.discussion details > summary { font: 600 0.98rem/1.3 var(--sans); padding: 0.95rem 2.75rem 0.95rem 1.1rem; }
.discussion details > summary::after { right: 1.2rem; }
.discussion details > *:not(summary) { margin-left: 1.1rem; margin-right: 1.1rem; }
.discussion details > p:last-child, .discussion details > .code:last-child { margin-bottom: 1.1rem; }
.discussion details .code--inline { margin-left: 0.75rem; margin-right: 0.75rem; }
.q__next { display: flex; justify-content: flex-end; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--rule); }

/* ---------- results ---------- */
.score { margin: 0 0 0.75rem; display: flex; align-items: baseline; gap: 0.6rem; font-family: var(--serif); letter-spacing: -0.03em; }
.score__n { font-size: clamp(4.5rem, 16vw, 7rem); line-height: 0.9; font-weight: 500; }
.score__of { font-size: 2rem; color: var(--muted); }
.recap { list-style: none; padding: 0; margin: 0 0 2.5rem; border-top: 1px solid var(--rule); }
.recap__item { display: flex; gap: 0.9rem; padding: 1rem 0; border-bottom: 1px solid var(--rule); }
.recap__mark { flex: none; display: grid; place-items: center; width: 1.6rem; height: 1.6rem; border-radius: 50%; font-size: 0.8rem; font-weight: 700; margin-top: 0.1rem; }
.recap__item--right .recap__mark { background: var(--accent-soft); color: var(--accent); }
.recap__item--wrong .recap__mark { background: var(--wrong-soft); color: var(--wrong); }
.recap__title { font: 600 1.02rem/1.35 var(--sans); }
.recap__line { margin: 0.25rem 0 0; color: var(--ink-2); font-size: 0.95rem; }
.cta { background: var(--card); border: 1px solid var(--rule); border-radius: 14px; padding: 1.5rem; margin: 0 0 2rem; }
.cta h2 { font: 500 1.45rem/1.2 var(--serif); margin: 0 0 0.6rem; }
.cta p { font: 1.04rem/1.6 var(--serif); color: var(--ink-2); margin: 0 0 1.2rem; }

/* ---------- footer ---------- */
.foot { border-top: 1px solid var(--rule); padding: 1.25rem 1rem 2rem; text-align: center; font-size: 0.85rem; color: var(--muted); }
.foot p { margin: 0; }
.noscript { font-family: var(--serif); font-size: 1.2rem; }

@media (max-width: 640px) {
  main { padding-top: 1.75rem; }
  .bar__inner { padding: 0.6rem 1rem; gap: 0.6rem; }
  .brand__sub { display: none; }
  .bar__right { gap: 0.6rem; }
  .pip { width: 0.9rem; }
  .lang button { padding: 0.42rem 0.5rem; font-size: 0.78rem; }
  .code { margin-left: -1rem; margin-right: -1rem; border-radius: 0; border-left: 0; border-right: 0; }
  .shiki { font-size: 0.8rem; }
  .shiki .line::before { width: 2.2rem; padding-right: 0.8rem; }
  .prose--prompt { font-size: 1.18rem; }
  .discussion { font-size: 1.06rem; }
  .discussion details > *:not(summary) { margin-left: 0.9rem; margin-right: 0.9rem; }
  .discussion details .code--inline { margin-left: 0; margin-right: 0; border-radius: 0; border-left: 0; border-right: 0; }
  .pick__options { grid-template-columns: 1fr; }
}