:root {
  --ink: #1c1410;
  --muted: #5c4f45;
  --paper: #f4ede3;
  --sheet: #fffaf3;
  --rule: #e4d5c3;
  --pen: #b42318;
  --pen-dark: #8a1a12;
  --stamp: #1f7a4d;
  --amber: #b45309;
  --focus: #0f4c5c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", system-ui, sans-serif;
  font-size: 1.05rem;
  line-height: 1.65;
  background-image:
    repeating-linear-gradient(transparent, transparent 27px, rgba(180, 35, 24, 0.04) 28px);
}

h1, h2, h3, .brand, .kicker {
  font-family: "Source Serif 4", Georgia, serif;
}

a { color: var(--pen-dark); }
a:hover { color: var(--pen); }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(244, 237, 227, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.site-header nav {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.7rem 1.25rem; gap: 1rem;
}
.brand { font-weight: 700; font-size: 1.2rem; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
.brand span { color: var(--pen); }
.nav-links { display: flex; gap: 1rem; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; font-size: 0.92rem; }
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 600; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  background: var(--pen); color: #fff !important; padding: 0.45rem 0.9rem;
  border-radius: 999px; text-decoration: none; font-weight: 700; font-size: 0.88rem;
}

.register {
  max-width: 1100px; margin: 0 auto; padding: 2.5rem 1.25rem 1rem;
}
.kicker {
  display: inline-block; font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--pen);
}
.register h1 {
  font-size: clamp(2rem, 4.4vw, 3.1rem); line-height: 1.15;
  margin: 0.6rem 0 1rem; font-weight: 700; letter-spacing: -0.03em;
}
.register h1 em { font-style: italic; color: var(--pen); font-weight: 600; }
.lede { max-width: 62ch; color: var(--muted); font-size: 1.12rem; }

.stamps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem;
  margin: 1.75rem 0 2rem; max-width: 720px;
}
.stamp {
  border: 1.5px dashed var(--stamp);
  background: var(--sheet);
  padding: 0.85rem 0.9rem;
  transform: rotate(-0.6deg);
}
.stamp:nth-child(2) { transform: rotate(0.5deg); }
.stamp:nth-child(3) { transform: rotate(-0.2deg); }
.stamp strong { display: block; font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--stamp); }
.stamp span { font-family: "Source Serif 4", serif; font-size: 1.05rem; }

.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 0.5rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.75rem 1.15rem; font-weight: 700; text-decoration: none;
  border-radius: 4px; border: 2px solid var(--ink);
}
.btn-primary { background: var(--pen); color: #fff !important; border-color: var(--pen-dark); }
.btn-secondary { background: var(--sheet); color: var(--ink) !important; }
.btn-ghost { background: transparent; color: var(--ink) !important; }

.two-col { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem 3rem; display: grid; grid-template-columns: 1.6fr 0.9fr; gap: 2rem; }
.content-page { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; display: grid; grid-template-columns: 1.7fr 0.8fr; gap: 2rem; }
.content-page aside { position: sticky; top: 5rem; align-self: start; }

.article-header h1 { font-size: clamp(1.7rem, 3vw, 2.35rem); line-height: 1.2; margin: 0.4rem 0 0.6rem; }
.meta { color: var(--muted); font-size: 0.88rem; }
.breadcrumb { font-size: 0.85rem; color: var(--muted); margin: 0.8rem 0 1.2rem; }
.breadcrumb span { margin: 0 0.35rem; }

.article-body h2 { font-size: 1.45rem; margin: 2rem 0 0.7rem; }
.article-body h3 { font-size: 1.15rem; margin: 1.4rem 0 0.5rem; }
.article-body p { margin: 0.7rem 0; }
.article-body ul, .article-body ol { padding-left: 1.2rem; }
.article-body li { margin: 0.3rem 0; }
.article-body blockquote {
  margin: 1rem 0; padding: 0.8rem 1rem; border-left: 4px solid var(--pen);
  background: var(--sheet);
}
.table-scroll { overflow-x: auto; margin: 1rem 0; border: 1px solid var(--rule); background: var(--sheet); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { padding: 0.65rem 0.75rem; text-align: left; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-size: 0.75rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); background: #f0e6d8; }
pre { overflow-x: auto; background: #1c1410; color: #f4ede3; padding: 1rem; font-size: 0.82rem; }

.card {
  background: var(--sheet); border: 1px solid var(--rule); padding: 1.1rem 1.15rem;
}
.card h2, .card h3 { margin-top: 0; }
.cta-box { background: var(--ink); color: var(--paper); padding: 1.2rem; }
.cta-box h3 { color: #fff; margin: 0 0 0.4rem; }
.cta-box p { color: #e4d5c3; }
.cta-box a { color: #fff; }
.cta-box .btn-primary { margin-top: 0.6rem; }

.site-footer {
  border-top: 1px solid var(--rule); padding: 2rem 1.25rem; color: var(--muted); font-size: 0.9rem;
}
.footer-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.site-footer a { color: var(--ink); text-decoration: none; font-weight: 600; }
.site-footer ul { list-style: none; padding: 0; margin: 0.4rem 0 0; }
.site-footer li { margin: 0.25rem 0; }
.footer-bottom { max-width: 1100px; margin: 1.4rem auto 0; padding-top: 1rem; border-top: 1px solid var(--rule); }

.form label { display: block; font-size: 0.85rem; font-weight: 700; margin-bottom: 0.25rem; }
.form input {
  width: 100%; padding: 0.7rem 0.8rem; border: 1.5px solid var(--rule); background: #fff; margin-bottom: 0.75rem;
  font: inherit;
}
.form button {
  width: 100%; padding: 0.85rem; background: var(--ink); color: #fff; border: 0; font-weight: 700; cursor: pointer;
}
.form button:disabled { opacity: 0.7; }
#formStatus { min-height: 1.2em; font-size: 0.88rem; font-weight: 600; }

@media (max-width: 800px) {
  .stamps, .two-col, .content-page, .footer-inner { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}