/* Keep — keepcentral.com
   Documentary, typographic, paper-toned. No JavaScript anywhere. */

:root {
  --paper: #f4efe4;
  --paper-deep: #ece5d4;
  --ink: #241f18;
  --ink-soft: #55493a;
  --rule: #b7a98d;
  --accent: #7a2e1d; /* oxblood */
  --plate-edge: #a8987a;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1b1712;
    --paper-deep: #221d16;
    --ink: #ddd3c0;
    --ink-soft: #a4967e;
    --rule: #4d4231;
    --accent: #c96f52;
    --plate-edge: #4d4231;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 17px; }

body {
  font-family: var(--serif);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  max-width: 46rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

/* ------- masthead ------- */

.rule-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-top: 3px double var(--ink);
  border-bottom: 1px solid var(--rule);
  padding: 0.4rem 0.1rem;
  margin-bottom: 2.75rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.14em;
}

.site-name { font-weight: 700; font-size: 1.05rem; }
.site-domain { color: var(--ink-soft); font-size: 0.95rem; }

h1 {
  font-size: 2.1rem;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.005em;
  max-width: 20em;
}

.standfirst {
  margin-top: 1.25rem;
  font-size: 1.12rem;
  color: var(--ink-soft);
  font-style: italic;
  max-width: 34em;
}

/* ------- plates (figures) ------- */

.plate {
  margin: 2.75rem 0;
}

.plate img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--plate-edge);
  outline: 1px solid var(--paper);
  outline-offset: -5px; /* inner keyline, like a mounted print */
  background: var(--paper-deep);
}

@media (prefers-color-scheme: dark) {
  .plate img { filter: brightness(0.88) sepia(0.06); }
}

.plate figcaption {
  margin-top: 0.6rem;
  text-align: center;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.12em;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

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

section { margin: 3.25rem 0; }

h2 {
  font-size: 1.35rem;
  font-weight: 700;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.35rem;
  margin-bottom: 1.1rem;
}

.secno {
  color: var(--accent);
  font-variant-numeric: lining-nums;
  margin-right: 0.75em;
  font-weight: 600;
}

h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 1.6rem 0 0.5rem;
}

p + p { margin-top: 0.9rem; }

strong { font-weight: 700; }
em { font-style: italic; }

blockquote {
  margin: 1.4rem 0 1.4rem 0;
  padding: 0.9rem 1.3rem;
  border-left: 3px solid var(--accent);
  background: var(--paper-deep);
  font-size: 1.05rem;
}

/* ------- code & diagram ------- */

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--paper-deep);
  padding: 0.08em 0.35em;
  border-radius: 2px;
}

pre {
  margin: 1.2rem 0;
  padding: 1rem 1.2rem;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  overflow-x: auto;
  line-height: 1.5;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.82rem;
}

pre.diagram {
  border-style: dashed;
}

pre.diagram code { font-size: 0.72rem; }

/* ------- colophon ------- */

.colophon {
  margin-top: 4rem;
  padding-top: 1.75rem;
  border-top: 3px double var(--ink);
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.colophon .mark {
  margin: 0 auto 1.25rem;
  width: 110px;
}

.colophon .mark img {
  width: 100%;
  height: auto;
  border-radius: 50%;
  border: 1px solid var(--plate-edge);
}

@media (prefers-color-scheme: dark) {
  .colophon .mark img { filter: brightness(0.88) sepia(0.06); }
}

.colophon p { max-width: 32em; margin-left: auto; margin-right: auto; }

.fineprint {
  margin-top: 1.1rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.16em;
  font-size: 0.85rem;
}

/* ------- small screens ------- */

@media (max-width: 480px) {
  html { font-size: 16px; }
  h1 { font-size: 1.7rem; }
  .rule-line { margin-bottom: 2rem; }
}