/* Evals, marked. An exercise book: squared paper, a margin line, a red marking pen. */

:root {
  --paper: #fbfcfe;
  --grid: #e4ebf4;
  --margin: #efb3ad;
  --ink: #17202d;
  --ink-2: #455163;
  --muted: #6f7b8d;
  --rule: #d5deea;
  --pen: #c42a1f;
  --biro: #1f4bb0;
  --pass: #17784a;
  --fail: #b42318;
  --warn: #9a5b00;
  --hl: #fff0a3;
  --panel: #ffffff;
  --code-bg: #f1f5fa;

  --f-display: "Schibsted Grotesk", "Arial Narrow", system-ui, sans-serif;
  --f-body: "Atkinson Hyperlegible Next", "Atkinson Hyperlegible", system-ui, sans-serif;
  --f-mono: "Atkinson Hyperlegible Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --f-pen: "Kalam", "Comic Neue", cursive;

  --sq: 24px;
  --col: 44rem;
  --wide: 60rem;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f141b;
    --grid: #19212c;
    --margin: #4d2522;
    --ink: #e8edf4;
    --ink-2: #b6c0ce;
    --muted: #8a96a8;
    --rule: #2a3544;
    --pen: #ff6f61;
    --biro: #8fb0ff;
    --pass: #4cc38a;
    --fail: #ff7a6b;
    --warn: #f0b04a;
    --hl: #4a3f0c;
    --panel: #151b24;
    --code-bg: #18202b;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0f141b;
  --grid: #19212c;
  --margin: #4d2522;
  --ink: #e8edf4;
  --ink-2: #b6c0ce;
  --muted: #8a96a8;
  --rule: #2a3544;
  --pen: #ff6f61;
  --biro: #8fb0ff;
  --pass: #4cc38a;
  --fail: #ff7a6b;
  --warn: #f0b04a;
  --hl: #4a3f0c;
  --panel: #151b24;
  --code-bg: #18202b;
  color-scheme: dark;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 1.5rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  padding-inline: 16px;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: var(--sq) var(--sq);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--biro); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--biro); outline-offset: 2px; border-radius: 2px; }

code, kbd { font-family: var(--f-mono); font-size: 0.88em; background: var(--code-bg); padding: 0.08em 0.35em; border-radius: 3px; }
strong { font-weight: 700; }
mark { background: var(--hl); color: inherit; padding: 0 0.15em; }

h1, h2, h3 { font-family: var(--f-display); line-height: 1.1; text-wrap: balance; margin: 0; }
h2 { font-size: clamp(1.9rem, 1.3rem + 2.2vw, 2.8rem); font-weight: 800; letter-spacing: -0.02em; }
h3 { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.01em; margin-top: 2rem; }
p { margin: 0.9rem 0 0; }

/* ---------- page frame ---------- */

.book {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 78rem;
  margin: 0 auto;
}
@media (min-width: 1100px) {
  .book { grid-template-columns: 15rem 1fr; gap: 3rem; }
}

.rail { display: none; }
@media (min-width: 1100px) {
  .rail {
    display: block;
    position: sticky;
    top: 0;
    align-self: start;
    height: 100vh;
    overflow-y: auto;
    padding: 2rem 1.25rem 2rem 0;
    border-right: 2px solid var(--margin);
  }
}
.rail__title { font-family: var(--f-display); font-weight: 800; font-size: 1.05rem; margin: 0 0 1rem; }
.rail__title a { color: var(--ink); text-decoration: none; }
.rail ol { list-style: none; margin: 0; padding: 0; counter-reset: q; }
.rail li { counter-increment: q; }
.rail li a {
  display: grid;
  grid-template-columns: 1.6rem 1fr;
  gap: 0.25rem;
  padding: 0.28rem 0;
  font-size: 0.9rem;
  line-height: 1.3;
  color: var(--ink-2);
  text-decoration: none;
}
.rail li a::before { content: counter(q); font-family: var(--f-mono); color: var(--muted); font-size: 0.8rem; padding-top: 0.1rem; }
.rail li a:hover { color: var(--ink); }
.rail li a[aria-current="true"] { color: var(--pen); font-weight: 700; }
.rail li a[aria-current="true"]::before { color: var(--pen); }
.rail__group { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 1.1rem 0 0.3rem; }
.rail__group:first-child { margin-top: 0; }

.jump { margin: 1.5rem 0 0; }
@media (min-width: 1100px) { .jump { display: none; } }
.jump summary { cursor: pointer; font-family: var(--f-display); font-weight: 700; }
.jump ol { columns: 2 12rem; margin: 0.75rem 0 0; padding-left: 1.4rem; font-size: 0.95rem; }

main { min-width: 0; padding-block: 1rem 6rem; }

.col { max-width: var(--col); }
.wide { max-width: var(--wide); }

.topbar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 0.75rem 0; font-size: 0.9rem; color: var(--muted); }
.topbar a { color: var(--muted); }
.theme-btn { font: inherit; font-size: 0.85rem; color: var(--ink-2); background: var(--panel); border: 1px solid var(--rule); border-radius: 999px; padding: 0.25rem 0.8rem; cursor: pointer; }

/* ---------- hero ---------- */

.hero { padding-block: 2.5rem 1rem; }
.hero h1 { font-size: clamp(3rem, 1.6rem + 6vw, 6.2rem); font-weight: 800; letter-spacing: -0.035em; line-height: 0.95; }
.hero h1 .scrawl { font-family: var(--f-pen); color: var(--pen); font-weight: 700; letter-spacing: 0; display: inline-block; transform: rotate(-4deg); }
.hero__lede { font-size: clamp(1.2rem, 1rem + 0.8vw, 1.5rem); line-height: 1.4; max-width: 36rem; margin-top: 1.25rem; }

/* ---------- sections ---------- */

.section { padding-top: 4.5rem; }
.q { font-family: var(--f-mono); font-size: 0.85rem; color: var(--pen); letter-spacing: 0.04em; margin-bottom: 0.5rem; display: block; }
.claim { font-size: 1.25rem; line-height: 1.45; margin-top: 1rem; max-width: 40rem; }
.part-head { margin-top: 5.5rem; padding-top: 1.25rem; border-top: 3px double var(--rule); }
.part-head p { margin: 0; font-family: var(--f-display); font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }

.pen {
  font-family: var(--f-pen);
  color: var(--pen);
  font-size: 1.12rem;
  line-height: 1.35;
}
.pen--block { display: block; margin-top: 0.75rem; transform: rotate(-0.6deg); }

.analogy {
  margin-top: 1.25rem;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 3px solid var(--hl);
  color: var(--ink-2);
}
.analogy b { color: var(--ink); }

ul.tight, ol.tight { margin: 0.9rem 0 0; padding-left: 1.3rem; }
ul.tight li, ol.tight li { margin-top: 0.35rem; }

/* ---------- tables ---------- */

.table-wrap { overflow-x: auto; margin-top: 1.25rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; background: var(--panel); }
th, td { text-align: left; padding: 0.55rem 0.75rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-family: var(--f-display); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-2); border-bottom: 2px solid var(--ink); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--f-mono); }
tr.hot td { background: color-mix(in srgb, var(--hl) 55%, transparent); }
caption { caption-side: bottom; text-align: left; font-size: 0.85rem; color: var(--muted); padding-top: 0.5rem; }

/* ---------- transcript: the exam script ---------- */

.script {
  margin-top: 1.5rem;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 4px;
  position: relative;
}
.script__row { display: grid; grid-template-columns: 1fr; border-top: 1px dashed var(--rule); }
.script__row:first-child { border-top: 0; }
@media (min-width: 640px) { .script__row { grid-template-columns: 9.5rem 1fr; } }
.script__label {
  padding: 0.65rem 1rem 0;
  font-family: var(--f-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
@media (min-width: 640px) { .script__label { padding: 0.8rem 1rem; border-right: 2px solid var(--margin); } }
.script__body { padding: 0.35rem 1rem 0.8rem; min-width: 0; }
@media (min-width: 640px) { .script__body { padding: 0.75rem 1rem; } }
.script__ask { font-size: 1.1rem; font-weight: 700; }
.script__reply { white-space: pre-wrap; overflow-wrap: anywhere; }
.calls { list-style: none; margin: 0; padding: 0; font-family: var(--f-mono); font-size: 0.82rem; }
.calls li { padding: 0.15rem 0; overflow-wrap: anywhere; color: var(--ink-2); }
.calls li b { color: var(--ink); font-weight: 700; }
.calls li.bad b, .req.bad { color: var(--fail); }
.req { font-family: var(--f-mono); font-size: 0.85rem; overflow-wrap: anywhere; }
.req.good { color: var(--pass); }
.none { color: var(--muted); font-style: italic; }

.verdict {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}
.verdict--pass { color: var(--pass); }
.verdict--fail { color: var(--fail); }
.verdict--unsafe { color: var(--fail); }
.verdict--miss { color: var(--warn); }
.verdict svg { width: 1.6rem; height: 1.6rem; }

.markbox { position: absolute; top: -1.1rem; right: 0.75rem; }
.markbox svg { width: 3.6rem; height: 3.6rem; filter: drop-shadow(0 0 0.5px var(--paper)); }
.markbox svg path { stroke: var(--pen); }

.stamp { stroke: currentColor; fill: none; stroke-width: 7; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- widgets ---------- */

.widget {
  margin-top: 1.75rem;
  padding: 1.25rem;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-top: 4px solid var(--ink);
  border-radius: 4px;
}
.widget__head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 0.5rem 1rem; }
.widget__title { font-family: var(--f-display); font-weight: 800; font-size: 1.1rem; }
.widget__hint { font-size: 0.9rem; color: var(--muted); }
.widget .script { margin-top: 1rem; }

.btn {
  font: inherit;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  border: 2px solid var(--ink);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  min-height: 44px;
}
.btn:hover { background: var(--code-bg); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: var(--ink-2); }
.btn--pass { border-color: var(--pass); color: var(--pass); }
.btn--fail { border-color: var(--fail); color: var(--fail); }
.btn[disabled] { opacity: 0.45; cursor: default; }
.btns { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }

.seg { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.seg button { font: inherit; font-size: 0.9rem; font-weight: 700; padding: 0.45rem 0.85rem; border: 2px solid var(--ink); border-radius: 4px; background: var(--panel); color: var(--ink); cursor: pointer; min-height: 40px; }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.reveal { margin-top: 1rem; padding: 0.9rem 1rem; border-left: 4px solid var(--pen); background: var(--code-bg); }
.reveal[hidden] { display: none; }

/* marks grid: one cell per trial */
.marks { max-width: 34rem; display: grid; grid-template-columns: minmax(8rem, 1fr) repeat(3, 2.6rem); gap: 0.25rem 0.35rem; align-items: center; margin-top: 1rem; font-size: 0.88rem; }
.marks__case { color: var(--ink-2); line-height: 1.25; padding-right: 0.5rem; }
.marks__head { font-family: var(--f-mono); font-size: 0.72rem; color: var(--muted); text-align: center; }
.cell {
  width: 2.6rem; height: 2.3rem;
  display: grid; place-items: center;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper);
  cursor: pointer;
  padding: 0;
  color: inherit;
}
.cell svg { width: 1.45rem; height: 1.45rem; }
.cell--pass { color: var(--pass); }
.cell--fail { color: var(--fail); }
.cell--unsafe { color: var(--fail); background: color-mix(in srgb, var(--fail) 14%, var(--paper)); border: 2px solid var(--fail); }
.cell[aria-pressed="true"] { outline: 3px solid var(--biro); outline-offset: 1px; }
@media (min-width: 720px) {
  .marks--wide { max-width: 46rem; grid-template-columns: minmax(14rem, 1fr) repeat(3, 2.6rem); }
}

.score-big { display: flex; flex-wrap: wrap; gap: 1.5rem 2.5rem; margin-top: 1rem; }
.score-big div { display: grid; }
.score-big b { font-family: var(--f-display); font-size: clamp(2.2rem, 1.6rem + 2vw, 3.2rem); font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.score-big span { font-size: 0.85rem; color: var(--muted); }
.score-big .is-bad b { color: var(--fail); }

.legend { display: flex; flex-wrap: wrap; gap: 0.4rem 1.2rem; font-size: 0.85rem; color: var(--ink-2); margin-top: 0.9rem; }
.legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.legend .cell { width: 1.5rem; height: 1.4rem; cursor: default; }
.legend .cell svg { width: 1rem; height: 1rem; }

/* sliders */
.slider { display: grid; gap: 0.25rem; margin-top: 1rem; }
.slider label { display: flex; justify-content: space-between; font-weight: 700; font-size: 0.95rem; }
.slider output { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
input[type="range"] { width: 100%; accent-color: var(--ink); min-height: 32px; }

.bars { display: grid; gap: 0.9rem; margin-top: 1.25rem; }
.bar__label { display: flex; justify-content: space-between; gap: 1rem; font-size: 0.95rem; }
.bar__label b { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.bar__track { height: 14px; background: var(--code-bg); border-radius: 4px; overflow: hidden; margin-top: 0.3rem; }
.bar__fill { height: 100%; border-radius: 0 4px 4px 0; transition: width 0.2s; }
.bar__fill--any { background: var(--biro); }
.bar__fill--all { background: var(--pen); }
@media (prefers-reduced-motion: reduce) { .bar__fill { transition: none; } }

/* ---------- figures ---------- */

figure { margin: 1.75rem 0 0; }
figure svg { width: 100%; height: auto; display: block; }
figcaption { font-size: 0.88rem; color: var(--muted); margin-top: 0.5rem; }
.fig-scroll { overflow-x: auto; }
.fig-scroll svg { min-width: 40rem; }

.svg-ink { fill: none; stroke: var(--ink); stroke-width: 2; }
.svg-box { fill: var(--panel); stroke: var(--ink); stroke-width: 2; }
.svg-box--pen { fill: var(--panel); stroke: var(--pen); stroke-width: 2.5; }
.svg-box--dash { fill: var(--panel); stroke: var(--ink-2); stroke-width: 1.5; stroke-dasharray: 5 4; }
.svg-t { fill: var(--ink); font-family: var(--f-display); font-weight: 700; font-size: 15px; }
.svg-s { fill: var(--ink-2); font-family: var(--f-body); font-size: 13px; }
.svg-m { fill: var(--ink-2); font-family: var(--f-mono); font-size: 12px; }
.svg-pen { fill: var(--pen); font-family: var(--f-pen); font-size: 16px; font-weight: 700; }
.svg-arrow { fill: none; stroke: var(--ink-2); stroke-width: 1.75; }
.svg-arrow--pen { fill: none; stroke: var(--pen); stroke-width: 2; }
.svg-head { fill: var(--ink-2); }
.svg-head--pen { fill: var(--pen); }

/* ---------- code ---------- */

pre {
  margin: 1.25rem 0 0;
  padding: 1rem 1.1rem;
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow-x: auto;
  font-family: var(--f-mono);
  font-size: 0.84rem;
  line-height: 1.55;
  tab-size: 2;
}
pre code { background: none; padding: 0; font-size: inherit; }
.c { color: var(--muted); }
.k { color: var(--biro); font-weight: 700; }
.s { color: var(--pass); }
.pn { color: var(--pen); font-weight: 700; }

.steps { list-style: none; counter-reset: step; margin: 1.5rem 0 0; padding: 0; }
.steps > li { counter-increment: step; position: relative; padding: 0 0 0 3rem; margin-top: 2.25rem; }
.steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: -0.15rem;
  width: 2.1rem; height: 2.1rem;
  display: grid; place-items: center;
  border: 2px solid var(--pen); border-radius: 50%;
  font-family: var(--f-pen); font-weight: 700; color: var(--pen); font-size: 1.15rem;
}
.steps h3 { margin-top: 0; }

/* checklist */
.checks { list-style: none; margin: 1rem 0 0; padding: 0; }
.checks li { display: grid; grid-template-columns: 1.8rem 1fr; gap: 0.5rem; padding: 0.7rem 0; border-bottom: 1px dashed var(--rule); }
.checks li::before { content: ""; width: 1.2rem; height: 1.2rem; border: 2px solid var(--ink); border-radius: 3px; margin-top: 0.2rem; }
.checks b { display: block; }
.checks span { color: var(--ink-2); font-size: 0.95rem; }

/* traps: two-column wrong/right */
.pairs { display: grid; gap: 0; margin-top: 1.25rem; border-top: 2px solid var(--ink); }
.pair { display: grid; grid-template-columns: 1fr; gap: 0.25rem 1.5rem; padding: 0.9rem 0; border-bottom: 1px solid var(--rule); }
@media (min-width: 720px) { .pair { grid-template-columns: 1fr 1fr; } }
.pair__bad { color: var(--ink); }
.pair__bad::before { content: "Trap: "; font-weight: 700; color: var(--fail); }
.pair__good { color: var(--ink-2); }
.pair__good::before { content: "Instead: "; font-weight: 700; color: var(--pass); }

/* glossary */
dl.words { display: grid; grid-template-columns: 1fr; margin: 1.25rem 0 0; border-top: 2px solid var(--ink); }
@media (min-width: 720px) { dl.words { grid-template-columns: 12rem 1fr; } }
dl.words dt { font-family: var(--f-display); font-weight: 700; padding: 0.7rem 0 0; }
dl.words dd { margin: 0; padding: 0.15rem 0 0.7rem; border-bottom: 1px solid var(--rule); color: var(--ink-2); }
@media (min-width: 720px) {
  dl.words dt { padding: 0.7rem 0; border-bottom: 1px solid var(--rule); }
  dl.words dd { padding: 0.7rem 0; }
}

.reading { list-style: none; margin: 1rem 0 0; padding: 0; }
.reading li { padding: 0.8rem 0; border-bottom: 1px solid var(--rule); }
.reading a { font-weight: 700; }
.reading span { display: block; color: var(--ink-2); font-size: 0.95rem; }
.reading small { color: var(--muted); }

.foot { margin-top: 5rem; padding-top: 1.5rem; border-top: 3px double var(--rule); font-size: 0.9rem; color: var(--muted); }

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