/* Item Audit — a verification desk: clean paper, ink-blue for what you can act on, green for "checked",
   amber for "read this first". One wide column for reading; cards only where something is a choice. */
@import url("https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,600;12..96,800&family=Source+Sans+3:wght@400;600;700&family=JetBrains+Mono:wght@400;600&display=swap");

:root {
  --page: #f5f7fa;
  --surface: #ffffff;
  --panel: #eef2f7;
  --ink: #0f1a2b;
  --ink-soft: #566173;
  --line: #dde3eb;
  --link: #1d4ed8;
  --accent: #1d4ed8;
  --accent-ink: #ffffff;
  --accent-soft: #e4ecfd;
  --ok: #157347;
  --ok-soft: #e1f3e9;
  --warn-edge: #b26a00;
  --warn-soft: #fbf1df;
  --shadow: 0 1px 2px rgba(15, 26, 43, 0.06), 0 8px 24px rgba(15, 26, 43, 0.06);
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "Source Sans 3", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --page: #0c121b;
    --surface: #131b26;
    --panel: #18212e;
    --ink: #e7ecf3;
    --ink-soft: #9ba7b7;
    --line: #263142;
    --link: #8db4ff;
    --accent: #6f9bff;
    --accent-ink: #0c121b;
    --accent-soft: #1b2a45;
    --ok: #6fd4a0;
    --ok-soft: #12301f;
    --warn-edge: #f0b65a;
    --warn-soft: #33270f;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --page: #0c121b;
  --surface: #131b26;
  --panel: #18212e;
  --ink: #e7ecf3;
  --ink-soft: #9ba7b7;
  --line: #263142;
  --link: #8db4ff;
  --accent: #6f9bff;
  --accent-ink: #0c121b;
  --accent-soft: #1b2a45;
  --ok: #6fd4a0;
  --ok-soft: #12301f;
  --warn-edge: #f0b65a;
  --warn-soft: #33270f;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 17px/1.62 var(--body);
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: 50rem;
  margin: 0 auto;
  padding-inline: 20px;
  padding-block: 0 4rem;
}

/* Header: brand on the left, navigation that scrolls sideways on a phone. */
header.site {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 10;
  background: color-mix(in srgb, var(--page) 86%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.6rem;
}

header.site .wrap {
  max-width: 68rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding-block: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font: 800 1.12rem/1 var(--display);
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  flex: none;
}

.brand::before {
  content: "";
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 6px;
  background:
    linear-gradient(135deg, transparent 52%, var(--accent-ink) 52% 62%, transparent 62%) ,
    var(--accent);
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent) 70%, black);
}

nav {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  scrollbar-width: none;
  min-width: 0;
  margin-left: auto;
}

nav::-webkit-scrollbar { display: none; }

nav a {
  flex: none;
  padding: 0.42rem 0.75rem;
  border-radius: 999px;
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  transition: background 0.15s, color 0.15s;
}

nav a:hover, nav a:focus-visible { color: var(--ink); background: var(--panel); }
nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }

a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Type */
h1, h2, h3 { font-family: var(--display); text-wrap: balance; color: var(--ink); }

h1 {
  font-weight: 800;
  font-size: clamp(2rem, 5.2vw, 3.1rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}

h2 {
  font-weight: 600;
  font-size: 1.45rem;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 3rem 0 0.8rem;
}

h3 { font-weight: 600; font-size: 1.12rem; margin: 1.8rem 0 0.5rem; }

p { margin: 0 0 1rem; }
p, li { color: var(--ink); }

.lede {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 62ch;
  margin-bottom: 1.6rem;
}

.soft { color: var(--ink-soft); }
.small { font-size: 0.88rem; }

a { color: var(--link); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

ul, ol { padding-left: 1.3rem; margin: 0 0 1rem; }
li { margin: 0.35rem 0; }
li::marker { color: var(--accent); }

/* Buttons */
.cta { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1.4rem 0 0.4rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.72rem 1.15rem;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none;
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn.ghost { background: var(--surface); color: var(--ink); border: 1px solid var(--line); box-shadow: none; }
@media (prefers-reduced-motion: reduce) { .btn, .btn:hover { transition: none; transform: none; } }

/* Tables: a rounded sheet that scrolls on its own on a phone. */
.scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  margin: 1.2rem 0;
}

.scroll table { margin: 0; border: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
  font-size: 0.95rem;
  background: var(--surface);
}

main > table { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: table; }

th, td {
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

tr:last-child td { border-bottom: 0; }

th {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--panel);
}

tbody tr:hover td, table tr:hover td { background: color-mix(in srgb, var(--accent-soft) 40%, transparent); }

td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.price {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  font-weight: 600;
  color: var(--accent);
}

/* Code */
code, pre { font-family: var(--mono); font-size: 0.86rem; }

pre {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
}

code {
  background: var(--panel);
  padding: 0.12rem 0.38rem;
  border-radius: 6px;
  overflow-wrap: anywhere;
}

pre code { background: none; padding: 0; }

/* Panels: the one thing on a page you can act on. */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.3rem;
  margin: 1.6rem 0;
  box-shadow: var(--shadow);
}

.panel > :last-child { margin-bottom: 0; }
.panel > :first-child { margin-top: 0; }

/* "Read this first": limits and caveats, in amber. */
.limit {
  position: relative;
  background: var(--warn-soft);
  border: 1px solid color-mix(in srgb, var(--warn-edge) 30%, transparent);
  border-radius: var(--radius);
  padding: 1rem 1.15rem 1rem 3rem;
  margin: 1.1rem 0;
}

.limit::before {
  content: "!";
  position: absolute;
  left: 1rem;
  top: 1rem;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font: 800 0.8rem/1 var(--body);
  color: var(--surface);
  background: var(--warn-edge);
}

.limit p:first-child { margin-top: 0; }
.limit p:last-child { margin-bottom: 0; }

/* Source tags under a figure */
.src {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-soft);
  background: var(--panel);
  border-radius: 6px;
  padding: 0.18rem 0.5rem;
  margin: -0.4rem 0 1rem;
  word-break: break-word;
}

/* Footer */
footer.site {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding-top: 1.6rem;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

footer.site .wrap { padding-bottom: 2.5rem; }
footer.site p { color: var(--ink-soft); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { padding-inline: 16px; }
  header.site .wrap { gap: 0.6rem; }
  .brand { font-size: 1rem; }
  h2 { font-size: 1.28rem; }
  .lede { font-size: 1.08rem; }
}

/* "Who are you?" cards on the home page */
.choices {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.8rem;
  margin: 1.4rem 0 2rem;
}

.choice {
  display: grid;
  gap: 0.35rem;
  align-content: start;
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}

.choice:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-2px); text-decoration: none; }
.choice strong { font-family: var(--display); font-size: 1.05rem; }
.choice span { color: var(--ink-soft); font-size: 0.92rem; }
.choice em { font-style: normal; color: var(--accent); font-weight: 700; font-size: 0.9rem; }
@media (prefers-reduced-motion: reduce) { .choice, .choice:hover { transition: none; transform: none; } }

/* Home page: a worked QCM example, numbered steps, short FAQ */
.qcm-example ol { padding-left: 1.6rem; }
.qcm-example li { margin: 0.3rem 0; }
.qcm-example li.right { color: var(--ok); font-weight: 600; }
.qcm-example li.wrong { text-decoration: line-through; text-decoration-color: var(--warn-edge); }
.qcm-example li.wrong span { text-decoration: none; display: inline-block; color: var(--warn-edge); font-size: 0.88rem; font-weight: 600; }

.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps li { counter-increment: step; position: relative; padding-left: 2.6rem; margin: 0.9rem 0; }
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0.05rem;
  width: 1.8rem; height: 1.8rem; border-radius: 50%;
  display: grid; place-items: center;
  font: 800 0.95rem/1 var(--display);
  background: var(--accent-soft); color: var(--accent);
}

.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 0.7rem 1rem; margin: 0.5rem 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 0.6rem 0 0; color: var(--ink-soft); }
.qcm-example .stage { margin: 1.4rem 0 0.4rem; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-soft); }
.qcm-example .stage:first-of-type { margin-top: 0.6rem; }
.qcm-example .verdict { border-left: 3px solid var(--accent); padding: 0.2rem 0 0.2rem 0.9rem; margin: 0.4rem 0 0.8rem; }
.qcm-example .scroll { margin: 0.6rem 0; }