/* actionppe.org — archival broadsheet.
   A document you consult, not a brand that sells. */

/* ---------- Font ---------- */

@font-face {
  font-family: "Source Serif 4";
  src: url("/fonts/source-serif-4-latin-wght-normal.woff2") format("woff2");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}

/* ---------- Tokens ---------- */

:root {
  --paper: #F7F4ED;       /* page background */
  --ink: #1D1B16;         /* body text */
  --oxblood: #7C342E;     /* links, section marks — the only saturated color */
  --slate: #41565A;       /* metadata, captions, Reviewed lines */
  --brass: #9C7C3C;       /* timeline ticks, table accents, flux callouts */
  --rule: #D9D2C2;        /* hairlines, borders */
  --deep-paper: #EDE8DC;  /* table headers, asides, standards chips */

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --measure: 68ch;
}

/* ---------- Base ---------- */

* { box-sizing: border-box; }

html {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 106.25%; /* 17px */
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body { margin: 0; }

.shell {
  max-width: var(--measure);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.2;
  margin: 2rem 0 0.75rem;
}

h1 { font-size: 1.9rem; margin-top: 0.5rem; }
h2 { font-size: 1.35rem; padding-top: 1rem; border-top: 1px solid var(--rule); }
h3 { font-size: 1.1rem; }

p, ul, ol, dl { margin: 0 0 1rem; }

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

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2rem 0;
}

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

figure { margin: 1.5rem 0; }
figcaption {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--slate);
  margin-top: 0.4rem;
}

code { font-family: var(--mono); font-size: 0.9em; }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--deep-paper);
  color: var(--ink);
  padding: 0.5rem 1rem;
}
.skip:focus { left: 0; z-index: 10; }

/* ---------- Masthead ---------- */

.masthead {
  border-bottom: 2px solid var(--ink);
  padding: 1.75rem 0 1rem;
  text-align: center;
}

.masthead .wordmark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 2.1rem;
  letter-spacing: 0.01em;
  margin: 0;
}
.masthead .wordmark a { color: var(--ink); text-decoration: none; }

.masthead .subtitle {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--slate);
  max-width: 52ch;
  margin: 0.5rem auto 0.9rem;
}

.site-nav {
  border-top: 1px solid var(--rule);
  padding-top: 0.6rem;
}
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem 1.4rem;
}
.site-nav a {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.14em;
  color: var(--ink);
  text-decoration: none;
}
.site-nav a:hover { color: var(--oxblood); text-decoration: underline; }

/* ---------- Wing slugs ---------- */

.wing-slug {
  font-family: var(--sans);
  font-variant-caps: all-small-caps;
  letter-spacing: 0.22em;
  font-size: 0.85rem;
  color: var(--oxblood);
  margin: 2.25rem 0 0;
}
.wing-slug a { color: inherit; text-decoration: none; }
.wing-slug a:hover { text-decoration: underline; }

/* ---------- Reviewed line + changelog ---------- */

.reviewed {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--slate);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0.45rem 0;
  margin: 0.75rem 0 1.5rem;
}
.reviewed .changelog { display: block; margin-top: 0.15rem; }
.reviewed .changelog::before { content: "Changelog — "; }

/* ---------- On this page ---------- */

.on-this-page {
  border: 1px solid var(--rule);
  background: var(--deep-paper);
  padding: 0.9rem 1.1rem;
  margin: 1.5rem 0;
  font-family: var(--sans);
  font-size: 0.85rem;
}
.on-this-page h2, .on-this-page p.otp-title {
  border: 0;
  padding: 0;
  margin: 0 0 0.4rem;
  font-family: var(--sans);
  font-variant-caps: all-small-caps;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  color: var(--slate);
  font-weight: 600;
}
.on-this-page ol {
  margin: 0;
  padding-left: 1.2rem;
}
.on-this-page li { margin: 0.2rem 0; }

/* ---------- Standards chips ---------- */

.chip {
  font-family: var(--mono);
  font-size: 0.82em;
  background: var(--deep-paper);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.08em 0.45em;
  white-space: nowrap;
}
a.chip { color: var(--oxblood); text-decoration: none; }
a.chip:hover { border-color: var(--oxblood); }

/* ---------- Guidance-in-flux callout ---------- */

.flux-callout {
  border: 1px solid var(--brass);
  border-left: 4px solid var(--brass);
  padding: 0.9rem 1.1rem;
  margin: 1.5rem 0;
}
.flux-callout .flux-label {
  font-family: var(--sans);
  font-variant-caps: all-small-caps;
  letter-spacing: 0.16em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brass);
  margin: 0 0 0.35rem;
}
.flux-callout p:last-child { margin-bottom: 0; }

/* ---------- Timeline (Record pages) ---------- */

.timeline {
  list-style: none;
  margin: 1.5rem 0;
  padding: 0 0 0 1.4rem;
  border-left: 2px solid var(--rule);
}
.timeline li {
  position: relative;
  margin-bottom: 1.1rem;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: calc(-1.4rem - 6px);
  top: 0.55em;
  width: 10px;
  height: 2px;
  background: var(--brass);
}
.timeline .tl-date {
  display: block;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.12em;
  color: var(--slate);
}

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

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.92rem;
}
.comparison-table caption {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--slate);
  text-align: left;
  padding-bottom: 0.4rem;
}
.comparison-table th {
  background: var(--deep-paper);
  font-family: var(--sans);
  font-size: 0.8rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.1em;
  text-align: left;
  border-top: 2px solid var(--brass);
  border-bottom: 1px solid var(--rule);
  padding: 0.5rem 0.6rem;
}
.comparison-table td {
  border-bottom: 1px solid var(--rule);
  padding: 0.5rem 0.6rem;
  vertical-align: top;
}
.comparison-table tbody th {
  border-top: 0;
  background: var(--deep-paper);
  font-variant-caps: normal;
  letter-spacing: 0;
}

/* ---------- Wing cards (home) ---------- */

.wings {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.75rem 0;
}
@media (min-width: 44rem) {
  .wings { grid-template-columns: 1fr 1fr; }
}
.wing-card {
  border: 1px solid var(--rule);
  border-top: 3px solid var(--oxblood);
  padding: 1rem 1.2rem 1.1rem;
}
.wing-card .wing-slug { margin-top: 0; }
.wing-card h2 { border: 0; padding-top: 0; margin-top: 0.3rem; font-size: 1.2rem; }
.wing-card ul { margin: 0.6rem 0 0; padding-left: 1.15rem; font-size: 0.92rem; }
.wing-card li { margin: 0.25rem 0; }
.wing-card p { font-size: 0.92rem; }

/* ---------- Recently reviewed (home) ---------- */

.recently-reviewed ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.recently-reviewed li {
  border-bottom: 1px solid var(--rule);
  padding: 0.55rem 0;
}
.recently-reviewed .rr-date {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--slate);
  margin-left: 0.5rem;
  white-space: nowrap;
}

/* ---------- Asides ---------- */

.aside-note {
  background: var(--deep-paper);
  border: 1px solid var(--rule);
  padding: 0.9rem 1.1rem;
  margin: 1.5rem 0;
  font-size: 0.92rem;
}

/* ---------- Contact form ---------- */

.contact-form { margin: 1.5rem 0; }
.contact-form p { margin-bottom: 1rem; }
.contact-form label {
  display: block;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.contact-form .cf-hint { font-weight: 400; color: var(--slate); }
.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
  width: 100%;
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--ink);
  background: #FFFDF8;
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 0.5rem 0.6rem;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--brass);
  outline-offset: 1px;
}
.contact-form button {
  font-family: var(--sans);
  font-variant-caps: all-small-caps;
  letter-spacing: 0.12em;
  font-size: 0.95rem;
  color: var(--paper);
  background: var(--oxblood);
  border: 0;
  border-radius: 2px;
  padding: 0.55rem 1.6rem;
  cursor: pointer;
}
.contact-form button:hover { background: #632a25; }
.contact-form .cf-hp { position: absolute; left: -9999px; }
.contact-form .cf-note {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--slate);
}

/* ---------- Footer ---------- */

.site-foot {
  border-top: 2px solid var(--ink);
  margin-top: 3.5rem;
  padding: 1.5rem 0 2.5rem;
}
.site-foot .foot-caveat {
  font-size: 0.88rem;
  color: var(--slate);
  border-left: 3px solid var(--brass);
  padding-left: 0.9rem;
  margin-bottom: 1.25rem;
}
.foot-nav ul {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.4rem;
}
.foot-nav a {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.14em;
  color: var(--ink);
}
.site-foot .provenance {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--slate);
  margin: 0;
}

/* ---------- Utility ---------- */

.lede { font-size: 1.08rem; }
.meta {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--slate);
}