/* Project 5W1H: site stylesheet
   Plain CSS, no build step. System fonts only, so no external requests.
   Palette: off-white paper, greys, one muted accent (dark teal). */

:root {
  --paper: #f7f5f0;
  --paper-2: #efece4;
  --ink: #1f2326;
  --ink-2: #474d52;
  --ink-3: #6b7176;
  --rule: #d6d2c8;
  --rule-strong: #2b2f33;
  --accent: #1f5c58;       /* dark teal */
  --accent-soft: #e3ebe9;

  --serif: "Iowan Old Style", "Charter", "Bitstream Charter", "Sitka Text",
           Georgia, "Noto Serif", "DejaVu Serif", serif;
  --sans: system-ui, -apple-system, "Segoe UI", "Source Sans 3", Roboto,
          "Helvetica Neue", Arial, sans-serif;

  --measure: 42rem;
  --wide: 68rem;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
}

img, svg { max-width: 100%; height: auto; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: var(--paper); padding: .5rem 1rem; z-index: 10;
}
.skip-link:focus { left: .5rem; top: .5rem; }

/* ---------- Masthead ---------- */
.masthead {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 1.75rem 1.25rem 0;
  text-align: center;
}
.masthead__meta {
  display: flex; justify-content: space-between; gap: 1rem;
  font-size: .75rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--ink-3);
  border-bottom: 1px solid var(--rule);
  padding-bottom: .5rem;
}
.masthead__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(2.4rem, 7vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: -.01em;
  margin: 1rem 0 .35rem;
}
.masthead__title a { color: inherit; text-decoration: none; }
.masthead--small .masthead__title { font-size: clamp(1.75rem, 5vw, 2.5rem); margin-top: .75rem; }
.masthead__tagline {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-2);
  font-size: 1.05rem;
  margin: 0 0 1rem;
}
.masthead--small .masthead__tagline { font-size: .95rem; margin-bottom: .75rem; }

.site-nav {
  border-top: 3px double var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
}
.site-nav ul {
  list-style: none; margin: 0; padding: .5rem 0;
  display: flex; justify-content: center; flex-wrap: wrap; gap: .25rem 1.75rem;
  font-size: .8125rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 600;
}
.site-nav a { color: var(--ink); text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent); text-decoration: underline; }

/* ---------- Layout ---------- */
main { display: block; }
.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 1.25rem; }
.measure { max-width: var(--measure); margin-left: auto; margin-right: auto; }

/* ---------- Front page ---------- */
.front {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 2.5rem;
  padding: 2rem 0 3rem;
}
.front__lead { border-right: 1px solid var(--rule); padding-right: 2.5rem; }
.section-label {
  font-size: .75rem; text-transform: uppercase; letter-spacing: .14em; font-weight: 700;
  color: var(--ink-3);
  border-bottom: 1px solid var(--rule);
  padding-bottom: .35rem; margin: 0 0 1.25rem;
}

.story { padding-bottom: 1.5rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--rule); }
.story:last-child { border-bottom: 0; }
.story__meta, .article__meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: .35rem .75rem;
  font-size: .8125rem; color: var(--ink-3);
}
.story__title {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.5rem, 3.2vw, 2.1rem); line-height: 1.2;
  margin: .5rem 0 .6rem;
}
.story__title a { color: var(--ink); text-decoration: none; }
.story__title a:hover { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; }
.story__summary { margin: 0 0 .75rem; color: var(--ink-2); font-size: 1.05rem; }
.story__more { font-size: .875rem; font-weight: 600; }

.tag {
  display: inline-block;
  font-size: .6875rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 700;
  color: var(--accent); background: var(--accent-soft);
  border: 1px solid #b3c9c6;
  padding: .1rem .5rem; border-radius: 2px;
}

.sidebar h2 {
  font-family: var(--serif); font-size: 1.2rem; margin: 0 0 .5rem;
}
.sidebar p, .sidebar li { font-size: .95rem; color: var(--ink-2); }
.sidebar section + section { margin-top: 2rem; }
.six {
  list-style: none; padding: 0; margin: .5rem 0 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: .4rem;
}
.six li {
  font-family: var(--serif); font-weight: 700; text-align: center;
  border: 1px solid var(--rule); background: var(--paper-2);
  padding: .4rem 0; color: var(--ink);
}
.formats { padding-left: 1.1rem; margin: .5rem 0 0; }
.formats li { margin-bottom: .4rem; }

/* ---------- Article ---------- */
.article { padding: 2.25rem 0 3rem; }
.article__header { border-bottom: 1px solid var(--rule); padding-bottom: 1.25rem; margin-bottom: 1.5rem; }
.article__title {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.75rem, 4.5vw, 2.6rem); line-height: 1.18;
  margin: .6rem 0 .9rem; letter-spacing: -.005em;
}
.article__byline { font-size: .875rem; color: var(--ink-3); margin: 0; }

.article__body h2 {
  font-family: var(--serif); font-size: 1.45rem; line-height: 1.25;
  margin: 2.25rem 0 .75rem;
  padding-top: 1rem; border-top: 1px solid var(--rule);
}
.article__body p { margin: 0 0 1rem; }
.article__body ul { padding-left: 1.2rem; margin: 0 0 1rem; }
.article__body li { margin-bottom: .55rem; }
.lead { font-size: 1.15rem; line-height: 1.6; }
.lead::first-letter {
  font-family: var(--serif); font-weight: 700;
  float: left; font-size: 3.4em; line-height: .85; padding: .08em .08em 0 0; color: var(--ink);
}

blockquote {
  margin: 1.5rem 0; padding: .25rem 0 .25rem 1.25rem;
  border-left: 3px solid var(--accent);
  font-family: var(--serif); font-size: 1.15rem; font-style: italic; color: var(--ink-2);
}
blockquote p { margin: 0 0 .35rem; }
blockquote cite { font-family: var(--sans); font-style: normal; font-size: .85rem; color: var(--ink-3); }

.qa { margin: 0; }
.qa dt { font-family: var(--serif); font-weight: 700; font-size: 1.1rem; margin-top: 1rem; }
.qa dd { margin: .15rem 0 0; }

.intro-note { font-size: .9rem; color: var(--ink-3); font-style: italic; }

/* Established / claimed / unknown labels. Greyscale shapes, not colour coding. */
.ecu { list-style: none; padding: 0 !important; }
.ecu li { display: grid; grid-template-columns: 7.5rem 1fr; gap: .75rem; align-items: baseline;
          padding: .55rem 0; border-bottom: 1px dotted var(--rule); margin: 0 !important; }
.ecu li:last-child { border-bottom: 0; }
.label {
  display: inline-block; text-align: center;
  font-size: .6875rem; text-transform: uppercase; letter-spacing: .1em; font-weight: 700;
  padding: .15rem .4rem; border-radius: 2px; white-space: nowrap;
}
.label--fact    { background: var(--ink); color: var(--paper); border: 1px solid var(--ink); }
.label--claim   { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
.label--unknown { background: transparent; color: var(--ink-2); border: 1px dashed var(--ink-3); }

.timeline { list-style: none; padding: 0 !important; border-left: 2px solid var(--rule); margin-left: .25rem !important; }
.timeline li { padding-left: 1rem; position: relative; }
.timeline li::before {
  content: ""; position: absolute; left: -6px; top: .55em;
  width: 10px; height: 10px; border-radius: 50%; background: var(--paper); border: 2px solid var(--accent);
}
.timeline strong { font-family: var(--serif); }

.sources { font-size: .95rem; }
.sources h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); margin: 1.25rem 0 .5rem; }
.sources li { overflow-wrap: anywhere; }
.sources .src-type { font-size: .75rem; color: var(--ink-3); }

.corrections {
  margin: 2.5rem 0 0;
  border: 1px solid var(--rule-strong);
  background: var(--paper-2);
  padding: 1rem 1.25rem;
}
.corrections h2 { border: 0 !important; padding: 0 !important; margin: 0 0 .5rem !important; font-size: 1.15rem !important; }
.corrections p { margin: 0; font-size: .95rem; }

.article__footer { margin-top: 2rem; font-size: .875rem; color: var(--ink-3); }

/* ---------- Plain pages (About, archive, 404) ---------- */
.page { padding: 2.25rem 0 3rem; }
.page h1 { font-family: var(--serif); font-size: clamp(1.8rem, 4.5vw, 2.4rem); line-height: 1.2; margin: 0 0 1rem; }
.page h2 { font-family: var(--serif); font-size: 1.35rem; margin: 2rem 0 .6rem; padding-top: 1rem; border-top: 1px solid var(--rule); }
.page p, .page li { color: var(--ink); }
.page ul, .page ol { padding-left: 1.2rem; }
.page li { margin-bottom: .5rem; }
.standfirst { font-family: var(--serif); font-size: 1.2rem; color: var(--ink-2); }

.archive { list-style: none; padding: 0 !important; }
.archive li { padding: 1rem 0; border-bottom: 1px solid var(--rule); margin: 0 !important; }
.archive a { font-family: var(--serif); font-weight: 700; font-size: 1.2rem; color: var(--ink); text-decoration: none; }
.archive a:hover { color: var(--accent); text-decoration: underline; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 3px double var(--rule-strong);
  margin-top: 1rem;
  padding: 1.5rem 0 2.5rem;
  font-size: .85rem; color: var(--ink-3);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 2rem; }
.site-footer p { margin: 0; }
.site-footer a { color: var(--ink-2); }

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  body { font-size: 1rem; }
  .front { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 1.5rem; }
  .front__lead { border-right: 0; padding-right: 0; }
  .sidebar { border-top: 3px double var(--rule-strong); padding-top: 1.25rem; }
  .masthead { padding-top: 1rem; }
  .masthead__meta { flex-direction: column; align-items: center; gap: .15rem; }
  .site-nav ul { gap: .25rem 1.1rem; }
  .ecu li { grid-template-columns: 1fr; gap: .25rem; }
  .ecu .label { justify-self: start; }
  .lead { font-size: 1.075rem; }
}

@media print {
  .site-nav, .skip-link { display: none; }
  body { background: #fff; }
  a { color: inherit; }
}

/* AI-transparency note at the foot of each article */
.ai-note {
  margin: 1.5rem 0 0; padding-top: .75rem;
  border-top: 1px solid var(--rule);
  font-size: .85rem; font-style: italic; color: var(--ink-3);
}

/* Question vs. Answer pieces */
.exchange { margin: 0 0 1.25rem; }
.exchange__label {
  margin: 0 !important; font-size: .75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .14em; color: var(--accent);
}
.exchange__who { margin: .1rem 0 .4rem !important; font-size: .9rem; color: var(--ink-3); }
.exchange blockquote { margin-top: .25rem; font-size: 1.05rem; }
.rating {
  border: 1px solid var(--rule-strong); background: var(--paper-2);
  padding: .75rem 1rem; font-size: .975rem;
}
.checks { list-style: none; padding: 0 !important; }
.checks li { padding: .7rem 0; border-bottom: 1px dotted var(--rule); margin: 0 !important; }
.checks li:last-child { border-bottom: 0; }
.checks li p { margin: 0 !important; }
.checks__claim { font-family: var(--serif); font-weight: 700; margin-bottom: .25rem !important; }
.checks .label { margin-right: .35rem; vertical-align: .1em; }
.calc-note { font-size: .95rem; color: var(--ink-2); }

/* Data tables */
.table-wrap { overflow-x: auto; margin: 0 0 .75rem; -webkit-overflow-scrolling: touch; }
.table-wrap:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.data-table { width: 100%; border-collapse: collapse; font-size: .95rem; font-variant-numeric: tabular-nums; }
.data-table caption { text-align: left; font-size: .85rem; color: var(--ink-3); padding-bottom: .4rem; }
.data-table th, .data-table td { padding: .5rem .75rem; border-bottom: 1px solid var(--rule); text-align: right; white-space: nowrap; }
.data-table th:first-child { text-align: left; }
.data-table thead th {
  font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-2);
  border-bottom: 2px solid var(--rule-strong); vertical-align: bottom; white-space: normal;
}
.data-table tbody th { font-weight: 600; }
.data-table tr.is-reference { background: var(--paper-2); }
.table-note { font-size: .875rem; color: var(--ink-3); }
@media (max-width: 760px) {
  .data-table th, .data-table td { padding: .45rem .5rem; font-size: .9rem; }
  .data-table tbody th { white-space: normal; }
}