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

/* Theme: Business Blue — calming business blue and white */
:root {
  --bg: #ffffff;
  --panel: #f2f7fb;
  --text: #1e2c38;
  --ink: #101418;
  --muted: #5d7181;
  --accent: #2b7cb3;
  --accent-deep: #1d5d88;
  --accent-soft: #e3eff8;
  --line: #dce7ee;
  --card-line: #b9d2e4;
  --btn-text: #ffffff;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 17px;
}

.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }

.site-header {
  border-top: 4px solid var(--accent);
  background: var(--bg);
  border-bottom: 2px solid var(--ink);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 10px;
  padding-bottom: 10px;
}

.brand img { height: 44px; width: auto; display: block; }

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 22px;
  font-weight: 500;
}

.site-header nav a:hover { color: var(--accent); }

.hero { padding: 56px 0 44px; }

.photo-band { border-top: 4px solid var(--accent); border-bottom: 2px solid var(--ink); }
.photo-band img { width: 100%; height: clamp(240px, 38vw, 440px); object-fit: cover; display: block; }

.hero-logo { max-width: 360px; width: 100%; height: auto; margin-bottom: 20px; display: block; }

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 3px;
  font-size: 13px;
  text-transform: uppercase;
}

h1 { font-size: 40px; line-height: 1.15; margin: 12px 0 16px; color: var(--ink); }

.lede { font-size: 20px; color: var(--muted); max-width: 660px; }

section.block { padding: 36px 0; border-top: 1px solid var(--line); }

h2 { font-size: 26px; margin-bottom: 14px; color: var(--ink); font-weight: 600; }
h2 .tick { color: var(--accent); }
h3 { font-size: 20px; margin: 22px 0 10px; color: var(--ink); font-weight: 600; }

p { margin-bottom: 14px; }

a { color: var(--accent); }

.card {
  background: #fff;
  border: 1px solid var(--card-line);
  border-top: 3px solid var(--accent);
  border-radius: 8px;
  padding: 28px;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--btn-text);
  font-weight: 600;
  padding: 12px 26px;
  border-radius: 6px;
  text-decoration: none;
}

.btn:hover { background: var(--accent-deep); color: var(--btn-text); }

.btn-ghost {
  display: inline-block;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 6px;
  text-decoration: none;
}

.btn-ghost:hover { background: var(--accent); color: var(--btn-text); }

.post-list { list-style: none; }
.post-list li {
  background: #fff;
  border: 1px solid var(--card-line);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 14px;
}
.post-list li a { font-weight: 600; text-decoration: none; }
.post-list li a:hover { text-decoration: underline; }
.post-list .date { color: var(--muted); font-size: 14px; }

.portrait {
  width: 210px;
  height: auto;
  border-radius: 14px;
  float: right;
  margin: 6px 0 18px 28px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
}

.section-img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  margin: 6px 0 18px;
  display: block;
}

.index-img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 22px;
  display: block;
}

.author-row { display: flex; align-items: center; gap: 22px; margin-bottom: 26px; }
.author-photo { width: 32%; max-width: 170px; height: auto; border-radius: 10px; border: 1px solid var(--card-line); }
.author-name { font-size: 30px; font-weight: 700; color: var(--ink); line-height: 1.1; }
.author-role { color: var(--accent); font-weight: 600; letter-spacing: 2px; text-transform: uppercase; font-size: 13px; margin-top: 6px; }

.site-footer {
  border-top: 2px solid var(--ink);
  margin-top: 48px;
  padding: 28px 0;
  color: var(--muted);
  font-size: 14px;
  background: var(--panel);
}

.site-footer nav { margin: 8px 0; }
.site-footer nav a { color: var(--muted); margin-right: 18px; text-decoration: none; }
.site-footer nav a:hover { color: var(--accent); }
.fine { margin-top: 10px; font-size: 13px; }

@media (max-width: 640px) {
  h1 { font-size: 30px; }
  .header-inner { flex-direction: column; gap: 10px; }
  .site-header nav a { margin: 0 11px; }
  .portrait { float: none; display: block; margin: 0 auto 20px; }
}

/* --- agent-ready / readability additions (Oct 2026) --- */
.skip { position: absolute; left: -9999px; top: 0; background: var(--ink); color: #fff; padding: 8px 14px; z-index: 10; }
.skip:focus { left: 10px; top: 10px; }
.site-header nav { display: flex; flex-wrap: wrap; justify-content: flex-end; row-gap: 4px; }
.site-header nav a[aria-current="page"] { color: var(--accent-deep); text-decoration: underline; text-underline-offset: 4px; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
img { max-width: 100%; height: auto; }
.block p, .block li, .block dd { max-width: 68ch; }
.start-list { list-style: none; margin: 14px 0; }
.start-list li { padding: 10px 0; border-bottom: 1px solid var(--line); }
.start-list a { font-weight: 600; text-decoration: none; color: var(--accent-deep); }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 26px; }
.toc a { font-size: 14px; background: var(--accent-soft); color: var(--accent-deep); padding: 4px 10px; border-radius: 14px; text-decoration: none; }
.glossary dt { font-weight: 700; color: var(--ink); margin-top: 18px; scroll-margin-top: 16px; }
.glossary dd { margin: 4px 0 0; padding-left: 14px; border-left: 3px solid var(--accent-soft); }
@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-header nav { justify-content: center; }
  .site-header nav a { margin: 2px 9px; padding: 6px 0; }
}
.cta-row { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 12px; }
.cta-note { margin-top: 10px; font-size: 14px; color: var(--muted); }
.ladder { list-style: none; display: grid; gap: 16px; margin: 20px 0 0; counter-reset: rung; }
.rung { background: var(--panel); border: 1px solid var(--card-line); border-left: 6px solid var(--accent); border-radius: 10px; padding: 20px 22px; }
.rung:nth-child(2) { border-left-color: var(--accent-deep); }
.rung:nth-child(3) { border-left-color: var(--ink); }
.rung h3 { margin: 4px 0 8px; }
.rung p + p { margin-top: 10px; }
.rung-tag { font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--accent-deep); }
.soon { font-size: 14px; color: var(--muted); font-style: italic; }