/* ClerkBrain — clerkbrain.pages.dev
   Paper/ledger theme: warm cream, ink navy, amber accent. Deliberately distinct
   from the GitHub Pages site's dark glassmorphism design. */

:root {
  --paper: #faf6ec;
  --paper2: #f2ead6;
  --ink: #1f2430;
  --ink-dim: #4b5263;
  --ink-dimmer: #7a8194;
  --line: #ddd2b6;
  --amber: #c8872a;
  --amber-ink: #8a5a16;
  --teal: #1f7a6c;
  --radius: 14px;
  --max: 1100px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    linear-gradient(180deg, var(--paper2), var(--paper) 340px),
    repeating-linear-gradient(0deg, transparent, transparent 37px, rgba(31,36,48,0.035) 38px);
  color: var(--ink);
  font-family: "Georgia", "Iowan Old Style", "Palatino Linotype", "Segoe UI", serif;
  line-height: 1.6;
}

a { color: var(--amber-ink); }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

.accent { color: var(--amber-ink); font-style: italic; }

.kicker {
  text-transform: uppercase; letter-spacing: 0.16em; font-size: 12px; font-weight: 700;
  color: var(--teal); margin: 0 0 10px; font-family: Arial, sans-serif;
}

.lede { color: var(--ink-dim); font-size: 1.12rem; max-width: 62ch; }

/* ---- Header ---- */
header.site { position: sticky; top: 0; z-index: 50; background: rgba(250,246,236,0.92); border-bottom: 2px solid var(--line); backdrop-filter: blur(6px); }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 1.15rem; color: var(--ink); font-family: Arial, sans-serif; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.nav-links { display: flex; align-items: center; gap: 24px; font-family: Arial, sans-serif; }
.nav-links a { text-decoration: none; color: var(--ink-dim); font-size: 0.92rem; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.nav-cta {
  background: var(--amber); color: #2a1a05 !important; padding: 9px 18px; border-radius: 6px;
  font-weight: 700; font-size: 0.88rem; text-decoration: none !important; white-space: nowrap;
  box-shadow: 0 3px 0 var(--amber-ink);
}
.nav-cta:hover { transform: translateY(1px); box-shadow: 0 2px 0 var(--amber-ink); }
.nav-toggle { display: none; background: none; border: 0; color: var(--ink); font-size: 1.5rem; cursor: pointer; }

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; inset: 64px 0 0 0; flex-direction: column; align-items: flex-start;
    padding: 24px; gap: 18px; background: var(--paper2); border-top: 1px solid var(--line);
    transform: translateY(-110%); transition: transform 0.25s ease; z-index: 49;
  }
  .nav-links.open { transform: translateY(0); }
}

/* ---- Hero ---- */
.hero { padding: 70px 0 54px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; }
@media (max-width: 880px) { .hero-grid { grid-template-columns: 1fr; } }
.hero h1 { font-size: clamp(2rem, 4.4vw, 3rem); line-height: 1.16; margin: 0 0 18px; font-weight: 700; font-family: Arial, sans-serif; }
.hero .lede { margin-bottom: 26px; }
.stamp {
  display: inline-block; border: 2px solid var(--teal); color: var(--teal); font-family: Arial, sans-serif;
  font-weight: 700; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 5px 10px; border-radius: 5px; transform: rotate(-2deg); margin-bottom: 18px;
}
.hero-frame { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: 0 18px 44px rgba(31,36,48,0.14); background: #fff; }

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 12px; font-family: Arial, sans-serif; }
.btn { display: inline-flex; align-items: center; gap: 9px; text-decoration: none !important; font-weight: 700; padding: 13px 24px; border-radius: 7px; font-size: 0.98rem; }
.btn-primary { background: var(--amber); color: #2a1a05; box-shadow: 0 4px 0 var(--amber-ink); }
.btn-primary:hover { transform: translateY(2px); box-shadow: 0 2px 0 var(--amber-ink); }
.btn-ghost { border: 2px solid var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.fine-print { color: var(--ink-dimmer); font-size: 0.82rem; font-family: Arial, sans-serif; }

/* ---- Sections ---- */
section { padding: 60px 0; }
.section-head { max-width: 680px; margin: 0 0 36px; }
.section-head h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); margin: 0 0 12px; font-weight: 700; font-family: Arial, sans-serif; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.ledger { border-top: 2px solid var(--ink); }
.ledger-row { display: grid; grid-template-columns: 90px 1fr 1fr; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); align-items: start; }
.ledger-row .num { font-family: Arial, sans-serif; font-weight: 700; color: var(--teal); font-size: 1.3rem; }
.ledger-row h3 { margin: 0 0 6px; font-family: Arial, sans-serif; font-size: 1.15rem; }
.ledger-row p { margin: 0; color: var(--ink-dim); }
@media (max-width: 700px) { .ledger-row { grid-template-columns: 50px 1fr; } .ledger-row .shot-cell { grid-column: 1 / -1; } }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 880px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card h3 { margin: 10px 0 8px; font-size: 1.08rem; font-family: Arial, sans-serif; }
.card p { margin: 0; color: var(--ink-dim); font-size: 0.95rem; }
.card .tag { font-family: Arial, sans-serif; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--amber-ink); font-weight: 700; }

.shot { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; box-shadow: 0 14px 34px rgba(31,36,48,0.12); background:#fff; }
.shot img { width: 100%; }

.band { background: var(--paper2); border-top: 2px solid var(--line); border-bottom: 2px solid var(--line); }

.quote-block { border-left: 4px solid var(--amber); padding: 4px 0 4px 22px; font-style: italic; color: var(--ink-dim); margin: 0 0 30px; }

.faq-item { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq-item summary { cursor: pointer; font-weight: 700; font-family: Arial, sans-serif; font-size: 1.02rem; list-style: none; display: flex; justify-content: space-between; gap: 14px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "＋"; color: var(--amber-ink); flex: none; }
.faq-item[open] summary::after { content: "－"; }
.faq-item p { color: var(--ink-dim); margin: 12px 0 0; }

.breadcrumb { font-size: 0.82rem; color: var(--ink-dimmer); margin: 20px 0 0; font-family: Arial, sans-serif; }
.breadcrumb a { color: var(--ink-dimmer); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

footer.site { border-top: 2px solid var(--line); padding: 44px 0 30px; color: var(--ink-dimmer); font-size: 0.88rem; font-family: Arial, sans-serif; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 28px; margin-bottom: 26px; }
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h4 { color: var(--ink); font-size: 0.82rem; margin: 0 0 10px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 7px; }
.footer-grid a { text-decoration: none; color: var(--ink-dimmer); }
.footer-grid a:hover { text-decoration: underline; }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 18px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

.prose { max-width: 740px; }
.prose h2 { margin-top: 2.1em; font-size: 1.35rem; font-family: Arial, sans-serif; }
.prose h3 { margin-top: 1.5em; font-size: 1.1rem; font-family: Arial, sans-serif; }
.prose p, .prose li { color: var(--ink-dim); }
.prose ul { padding-left: 20px; }

.page-hero { padding: 50px 0 10px; }
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin: 10px 0 14px; font-family: Arial, sans-serif; }