/* Aidan Hearth Cybersecurity Studio - shared stylesheet
   v4 kintsugi: warm clay-grey paper, deep umber ink, one gold (金繼) accent.
   Palette sampled from the chosen hero image (DNA6). Static site, no JavaScript. */

:root {
  color-scheme: light;
  --paper: #ece4d6;      /* warm clay-grey, lighter than hero for readability */
  --panel: #f3ecdf;
  --ink: #362c1f;        /* deep umber, darkest tone of the bowl */
  --ink-soft: #6f6048;
  --rule: #d6cab6;
  --rule-strong: #362c1f;
  --gold: #a17c43;       /* kintsugi gold seam */

  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;

  --col: min(960px, calc(100% - 48px));
  --measure: min(62ch, 100%);
}

*,*::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;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
.col { width: var(--col); margin-inline: auto; }

.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;
}

/* ---------- Masthead ---------- */
.site-nav { border-bottom: 1px solid var(--rule-strong); background: var(--paper); }
.site-nav .col {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 10px 28px; padding-block: 18px;
}
.brand { font-family: var(--serif); font-size: 1.25rem; font-weight: 700; color: var(--ink); text-decoration: none; }
.brand:hover { color: var(--gold); }
.nav-links { display: flex; flex-wrap: wrap; gap: 26px; font-family: var(--mono); font-size: 0.85rem; letter-spacing: 0.01em; }
.nav-links a { color: var(--ink-soft); text-decoration: none; }
.nav-links a:hover { color: var(--gold); }

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

main { flex: 1 0 auto; }

/* ---------- Hero image (kintsugi) ---------- */
.hero-full { background: var(--paper); }
.hero-img {
  display: block;
  width: 100%;
  max-width: 1536px;
  margin-inline: auto;
  height: auto;
}

/* lede directly under the hero image */
.lede-section { padding-block: 52px 8px; }
.lede {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--ink);
  max-width: 26ch;
  margin: 0 0 14px;
}
.lede-sub { color: var(--ink-soft); font-size: 1.12rem; margin: 0; max-width: var(--measure); }

/* ---------- Sections ---------- */
.section { padding-block: 60px; }
.section + .section { border-top: 1px solid var(--rule); padding-top: 54px; }

.page-title {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(2.4rem, 5.5vw, 3.8rem); line-height: 1.0; letter-spacing: -0.015em;
  margin: 0 0 26px;
}
h2 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.05rem); line-height: 1.15; letter-spacing: -0.005em;
  margin: 0 0 16px;
}
h3 { font-family: var(--serif); font-weight: 700; font-size: 1.4rem; line-height: 1.2; margin: 0 0 8px; color: var(--ink); }
p { max-width: var(--measure); margin: 0 0 16px; }
.intro { color: var(--ink-soft); font-size: 1.12rem; }

/* ---------- Numbered editorial list ---------- */
.entries { margin-top: 28px; }
.entry {
  display: grid; grid-template-columns: 3.5rem 1fr; column-gap: 24px; align-items: start;
  border-top: 1px solid var(--rule); padding-block: 28px;
}
.entry:first-child { border-top: 1px solid var(--rule-strong); }
.entry:last-child { border-bottom: 1px solid var(--rule); }
.entry-num { font-family: var(--mono); font-size: 0.9rem; color: var(--gold); padding-top: 0.45rem; letter-spacing: 0.02em; }
.entry-body h3 { margin-bottom: 6px; }
.entry-body p { margin-bottom: 0; color: var(--ink-soft); }

/* ---------- Reports ---------- */
.report { border-top: 1px solid var(--rule); padding-block: 32px; }
.report:first-of-type { border-top: 1px solid var(--rule-strong); }
.report:last-of-type { border-bottom: 1px solid var(--rule); }
.status { font-family: var(--mono); font-size: 0.88rem; line-height: 1.5; color: var(--ink-soft); margin: 0 0 12px; max-width: min(64ch,100%); }
.report p { color: var(--ink-soft); margin-bottom: 0; }

/* ---------- Methodology / About blocks ---------- */
.block { margin-top: 38px; border-top: 1px solid var(--rule); padding-top: 30px; }
.block:first-of-type { margin-top: 30px; border-top: 1px solid var(--rule-strong); }
.block p { color: var(--ink-soft); }

/* ---------- Contact ---------- */
.contact { margin-top: 20px; display: grid; grid-template-columns: auto 1fr; column-gap: 22px; row-gap: 10px; max-width: min(64ch,100%); align-items: baseline; }
.contact dt { color: var(--ink-soft); font-family: var(--mono); font-size: 0.85rem; }
.contact dd { margin: 0; color: var(--ink); }
.fingerprint { font-family: var(--mono); font-size: 0.92rem; letter-spacing: 0.01em; word-spacing: 0.05em; }

/* ---------- 404 ---------- */
.notfound { padding-block: 100px; }
.notfound h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(3.4rem,11vw,6rem); margin: 0 0 18px; }
.notfound p { font-size: 1.2rem; color: var(--ink-soft); }

/* ---------- Footer (colophon) ---------- */
.site-footer { flex-shrink: 0; border-top: 2px solid var(--rule-strong); margin-top: 20px; padding-block: 32px 42px; }
.site-footer .col { color: var(--ink-soft); }
.footer-name { font-family: var(--serif); font-size: 1.08rem; color: var(--ink); margin: 0 0 10px; }
.footer-contact { font-family: var(--mono); font-size: 0.85rem; margin: 0 0 14px; max-width: none; color: var(--ink-soft); }
.footer-contact a { color: var(--ink-soft); text-decoration: underline; }
.footer-contact a:hover { color: var(--gold); }
.footer-sep { color: var(--rule); padding-inline: 4px; }
.footer-note { font-size: 0.9rem; color: var(--ink-soft); margin: 0; max-width: none; }
.last-reviewed { font-family: var(--mono); font-size: 0.85rem; color: var(--ink-soft); margin-top: 36px; }

@media (max-width: 560px) {
  .entry { grid-template-columns: 1fr; row-gap: 6px; }
  .entry-num { padding-top: 0; }
  .contact { grid-template-columns: 1fr; row-gap: 4px; }
  .contact dd { margin-bottom: 8px; }
}